2932 - Enamel, Synthetic 34115x

IS 2932:2003

Wt’(1%1 ~11*

‘q-aw-?r, +-f%-m, W1-s8 : (*) Wlch‘i (Q) mwufkfafm (dh’mljp?)m) Indian Standard ENAMEL, SYNTHETIC, EXTERIOR : (a) UNDERCOATING (b) FINISHING — SPECIFICATION ( Third Revision)

ICS 87.040

(3 BIS 2003

BUREAU MANAK

December 2003

OF BHAVAN,

INDIAN

STANDARDS

9 BAHADUR SHAH NEW DEL1{I 110002

ZAFAR

MARG

Price Group 7

Paints, Varnishes

and Related Products Sectional Committee,

CHD 20

FOREWORD This Indian Standard (Third Revision) was adopted by the Bureau of Indian Standards, after the draft finalized by the Paints, Varnishes and Related Products Sectional Committee had been approved by the Chemical Division Council. Composition requirement has been simplified making it more performance oriented; requirement for freedom from unsaponifiable synthetic hydrocarbon resin has been deleted. Also, changes made in this standard through various amendments have been amalgamated in this revised version. Through Annex G, a testing programme

has been added in this revision, for the guidance of purchasers.

For satisfactory results, it is desirable that primer, undercoating same manufacturer. The composition

of the Committee

and the finishing enamel are obtained from the

responsible. for the preparation

of this standard is given in Annex H.

For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2: 1960 ‘Rules for rounding off numerical values (revise~’. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.

IS 2932:2003

Indian Standard ENAMEL, SYNTHETIC, EXTERIOR : (a) UNDERCOATING (b) FINISHING — SPECIFICATION (’Third Revision) 1 SCOPE

modifications in any form when tested in accordance with IS 101 (Part 9/See 2). In case of disputes, test to be carried out as prescribed in Annex B. It shall be of such a composition as to satisfy the requirements of this standard.

This standard prescribes requirements, methods of sampling and test for the material commercially known as enamel, synthetic, exterior: (a) undercoating (b) finishing, colour as required used in painting system for protection and decoration.

6.1.2 Total Non-volatile

2 REFERENCES

Content

The total non-volatile matter including pigments, extenders and vehicles, when tested as per IS 101 (Part 8/See 2) shall not deviate by more than+ 2 units by mass from the recorded data of ed sample. This applies to both undercoating and finishing enamels.

The standards listed in Annex A contain provisions which through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated in Annex A.

6.2 Condition

in Container

6.2.1 At Delivery

3 TERMINOLOGY

At the time of delivery the paint shall be in such a condition that manual stirring readily produces a uniform product.

3.1 For the purpose of this standard, the definitions given in IS 1303 and that given below shall apply. 3.1.1 ed Sample — Sample supplied in advance by a prospective supplier and ed by the testing agency, atler testing as per all requirements of this standard. A complete record of its performance shall be kept in respect of all tests.

During the 12 months storage period, the rating for degree of settling shall not drop to O, when tested as per IS 101 (Part 6/See 2).

4 CLASSES

6.3 Freedom

The material shall be supplied in brushing consistency but shall be suitable for application by brushing and air spraying thinning with petroleum hydrocarbon solvent to grade 145/205 low aromatic grade (see IS 1745) or suitable thinner as agreed to between the purchaser and the supplier.

The paint shall be free from coarse aggregates, suspended particles of gel and foreign matter, when tested as per IS 101 (Part l/See 2).

5 COLOUR

6.2.2 During Storage

from Coarse

Particles

6.4 Skin Formation The paint shaIl show no skin formation, examined visually at the time of delivery.

CATEGORIES

For the purpose of registration of the samples of the material, the colour categories given in Table 1 shall be employed.

when

6.5 Thinning Properties The paint shall be capable of being readily mixed with the petroleum hydrocarbon, solvent grade (see IS 1745) or with a suitable thinner as agreed to between the purchaser and the supplier, without showing any precipitation.

6 REQUIREMENTS 6.1 Composition 6.1.1 General

6.6 Application

The material shall be based on synthetic alkyd resin, free from natural rosin or its derivatives or its

Properties

The paint shall normally 1

be supplied

in a condition

IS 2932:2003 Table 1 Colour Categories and Wet Opacity Requirements (Clause 5) Colour Category No.

Colour Shade

ISC No. as per Is 5

Shade Recommneded for Registration of Samples

Wet Opacity Requirement, Min, m2/10 Iitre

(1)

(2)

(3)

(4)

(5)

1

White

—

White

130

2

Black

—

Black

260

3

Dark violet

796

Dark violet

4

i) ii)

Turquoise

iii)

Oriental

iv)

Light iral grey

697

v) vi)

Phirozi

176

Satin blue

177

i) ii)

Eau-de-nil

216

Opaline

275

iii)

Apple green

281

iv)

Bus green

299

i) ii)

Peacock blue

103

Azure blue

104

iii)

Traffic

169

5

6

7

Sky blue

13

1’4

Ii 16

17

green

blue

Oxford blue

105 106

French blue

12

I 74

Navy blue

Aircraft

II

102

i)

8

10

blue

blue

ii)

9

blue

Apple green

210

Traffic blue

200

Oxford blue

100

170

Aircratl

French blue

150

217

Sea green

170

Sage green

160

Traffic green or Grass green

I 50

Middle

220

i) ii)

Sage green

219

Light olive green

278

iii)

Aircraft

283

O

Grass green

218

ii)

Traffic

267

iii)

India green

iv)

Brilliant

i) ii)

Light brunswick Middle

iii)

Deep brunswick

blue

280

grey green

green

284

green

221 green

brunswick

green

green

225 226

iv)

I.incoln

green

276

Cypress green

277

Forest green

282

i) ii)

Olive green

220

Light bronze green

222

iii)

Middle

223

iv)

Deep bronze green

224

v) vi)

Steel furniture green

279

Scamic

294

vii)

Olive drab

298

bronze green

brunswick

227

v) vi)

Canary yellow

160

108

i) ii)

green

Turquoise blue

166

Sea green Verdigris

80

101

Olive green

220

309

Canary yellow

100

O ii)

Lemon

355

Golden yellow

100

Golden yellow

356

i)

Pale cream

352

ii)

Deep cream

353

iii)

L.igbt stone

361

iv)

Portland stone

364

v)

Vellum

365

Pale cream or

110

vi)

Light straw

384

deep cream

vii)

Light biscuit

385

IS 2932:2003 Table 1 (Corzchde~ (1)

(2) viii)

Champagne

386

ix)

Sunshine

387

x) xi)

Beige

388

Jasmine yellow

397

xii)

Light salmon pink

442

xiii)

Salmon pink

443

18

Primrose

19

Light buff

20

i) ii)

Deep buff

360

iii)

Middle

362

i) ii)

Dark stone

363

Light brown

410

iii)

Middle

brown

411

iv)

Golden brown

414

v) vi)

India brown

415

Leaf brown

489

i) ii)

Dark brown

412

Orange brown

439

iii)

Venetian

445

iv)

Red oxide

446

v) vi)

Deep Indian red

448

Light purple brown

449

vii)

Gulf red

473

viii)

Beech brown

490

i)

Nut brown

413

ii)

Chocolate

451

iii)

Service brown

449

21

22

23

24 25

Middle

buff

(5)

354

Primrose

100

358

Light buff

160

Deep bufY

200

Light brown

140

Gulf red

200

Net brown

220

359

stone

red

Terra cotta

444

i) ii)

Fire red

536

Signal red

537

iii)

Post oflice red

538

Post office red

iv)

Crimson

540

or signal red

v)

International

orange

Maroon

27

i) ii)

Traffic

Light orange

557

iii)

‘fraftic

570

iv)

Deep orange

541 yellow red

Maroon

130

Deep orange

120

India saffron

120

200

591

India saffron

29

i)

Silver grey

ii)

Quaker grey

629

iii)

French grcy

630

574 628

iv)

Light grey

63 [

v) vi)

Dark iral grey

632

Light grey or

Smoke grey

692

aircrafi grey

vii)

Aircraft

693

viii)

Dove grey

694

i) ii)

RAF blue grey

633

S Iate

634

iii)

Lead

iv)

Middle

v)

Dark blue grey

635 graphite

60

368

28

grey

Terra cotta

592

26

30

(4)

(3)

RAF blue grey

671 695

3

230

160

IS 2932:2003 suitable

for application

by brushing,

either

Annex E, shall not show signs of disintegration or change of colour to a rating not less than 8, taking the original coIour as 10. The loss of gloss shall not be more than 50 per cent of the original gloss.

as supplied

or when thinned with not more than 5 percent by volume of petroleum hydrocarbon solvent (see IS 1745) or with another suitable thinner as agreed to between the purchaser and the supplier. The paint may also be supplied in a condition suitable for spraying when thinned with not more than 20 percent by volume of the aforementioned thinner.

6.10 The material shall also requirements given in Table 2. 7 PACKING

6.7 Durability 6.7.1 ed

Sample

AND MARKING

7.2 Marking 7.2.1 Each following:

6.7.1.3 QUV apparatus may be used as an alternative when tested with an approved sample for a period of ~oo }1. that (Iw outdoor exposure test (see C-3) and the

be marked

with

a)

Name and type of the material;

b)

Indication of the source of manufacture;

c)

Volume of the material;

d)

Lot number or batch otherwise; and

e)

Month and year of manufacture.

number

in code

the

or

The container may also be marked with the Standard Mark.

6.7.2 %inp]e,fioin Bulk SUPPIY The characteristics of a film of the material prepared from a representative sample of the bulk supply as prescribed in C-2 tested in the accelerated weathering apparatus (see C-4) and examined every third day for a period of 21 days shall not deviate more than the limits specified in 6.7.2.1 and 6.7.2.2.

7.2.2.1 The use of the Standard Mark is governed by the provisions of Bureau ofIndian Standar& Act, 1986 and the Rules and Regulations made thereunder. The details of conditions under which the Iicence for the use of the Standard Mark may be granted to manufacturers or producers maybe obtained fi-om the Bureau of Indian Standards.

6.7.2. I Gloss (specular 60”) retention of bulk supply shall be within + 10 units of that of the recorded data of ed sample.

8 SAMPLING

6.7.2.2 The results of observation on characteristics of the colour, cracking, checking, spotting etc, of the bulk supply sample shall not be less than rating of 8 when evaluated as per C-3.2.

8.1 Preparation

of Test Samples

8.1.1 For Registration The sample shall be submitted in three different containers each containing not less than 500 ml of the material.

to Acid (for Finishing Only)

A film of the material, when tested as prescribed in Annex D, shall not show signs of disintegration or change of colour to a rating not less than 8, taking the original colour as 10. The loss of gloss shall not be more than 50 percent of the original gloss.

8.1.1.1 As testing to the requirements of this standard covers a period of more than 12 months, the supplier is advised to submit samples for registration sufficiently in advance within the period from October to December of the year, so that outdoor exposure test can be started during the period stipulated in C-3.1.

to Alkali (for Finishing Only) when tested as prescribed

shall

7.2.2 BIS Cert~jication Marking

accelerated weathering test (see C-4) are carried out in duplicate,

A film of the material,

container

7.2.1.1 The material when intended for defence purposes, shall be marked in accordance with IS 5661.

NOTE — As ~ prccaation against inadvertent accidents, it is

6.9 Resistance

the

Unless otherwise agreed to between the purchaser and the supplier, the enamel shall be packed in suitable metal containers (see IS 1407 and IS 2552).

6.7.1.2 A film of the sample for registration shall be prepared and tested in accelerated weathering apparatus using carbonlxenon arc, as prescribed under C-4. It shall be examined every third day for a period of 21 days and a complete record of its performance maintained.

6.8 Resistance

with

7.1 Packing

6.7.1.1 When prepared and tested as prescribed under C-3 up to a period of 12 months preferably at National Test House, Kolkata , a film prepared from the sample for registration of the material shall satisfy the requirements of the test.

rccommeodcd

comply

in 4

IS 2932:2003 Table 2 Requirements for Enamel, Synthetic, (a) Undercoating (b) Finishing

Exterior

(Clause 6.10)

S1

Methods of Test

Requirements —

Characteristics

No.

/

-

.

Undercoating

Finishing

Refto IS 101

(3)

(4)

(5)

Annex/Other Standard

(1) O

(2)

Smooth, uniform and suitable for brushing without

a) Consistency

(6)

Visual

—

(Part l/See 5)

—

(Part l/See 7)

—

appreciable drag on the brush b) Viscosity by ford cup

80-120 S

80-120 S

11.5

9.0

No. 4 at 27 + 2°C ii)

Mass, in lig/10 Iitres, Mirr

iii)

Drying time, h, Max a)

(Part 3/See 1)

2 8 24

Surface dry

b) Hard dry c) Tack free iv)

a) Finish

4 12 24 Smooth and glossy

(Part 3/See 4)

—

o to 20

Above 71

(Part 4/See 1)

—

Not more than 50

Not more than 15

(Part 3/See 5)

—

microns

microns (Part 4/See 2)

—

Smooth and matt to egg shell gloss

b) (dOSS 60° v) vi)

Fineness of grind

Approximate

Colour

with

match

[SC No.

385

or

match

to

the

an agreed colour

635 vii)

Close

specified 1S eolour or to

No such scratch as to show bare metal

Scratch hardness after 48 h air

Clause 3 of (Part 5/See 1)

drying (1 000 g) viii)

Flexibility

and adhesion

ix)

Flash point

x)

Composition: a)

No visible

damage or

No

visible

damage

or

detachment atler 48 h

detachment after 96 h of

of air drying

air drying

Not below 30”C

Not below 30°C

Volume solids percent, Min

b) Phthaliic anhydride

Clause 2 of (Part 5/See 2)

(Part l/See 6)

40

35

(Part 8/See 6)

20

20

.

— Clause 11 of

cootent of non-volatile

Is 354 (Part 2)

vehicle, percent by mass, Mirr xi)

Accelerated

storage stability

test,

—

Shall the test

Shall the test

Not less than one year

Not less than one year

from date of manufac-

from date of manufac-

turing

turing

Annex F

at 60”C, 96 h xii)

Keeping properties

8.1.2 Tender Sample

(Part 6/See 2)

requirements of this standard if the test results of the composite samples satisfy the requirements as prescribed in 6.

The supplies may dispense with sending a tender sample standard provided that he declares that the material, for which the tender is given, of the same quality as the sample previously ed in his name.

9 TEST METHODS

Representative samples of the materials shall be drawn and treated as prescribed in IS 101 (Part 1/See 1),

9.1 Test shall be conducted as prescribed in various parts of IS 101 and various Annexes to this standard. References to the relevant clauses of these standards are given in CO15 of Table 2, 6.1, 6.2 and 6.3.

8.2 Criteria

9.2 Quality of Reagents

8.1.3 Bulk Supply Sample

A lot shall

for Conformity be declared

as conforming

Unless

to the 5

specified

otherwise,

pure

chemicals

and

IS 2932:2003 test to be not inferior to the approved

distilled water (see 1S 1070) shall be employed in tests. NOTE

— ‘Pure chemicals’

shall mean chemicals that do not

10.2.2 Alternatively, the vendor may give following information and may declare compliance with ed sample:

contain impurities which affect the results of analysis.

9.3 Comparison with the performance of the ed sample shall be carried out on the basis of records maintained for the ed samples (see 6.7. 1). 9.4 For match against Indian Standard shall be used. 10 GENERAL

colours, IS 5

PROVISIONS

a)

Description

of paint,

b)

Vendor’s product reference,

c)

Lot identification,

d)

Quantity in lot, and

e)

Date of manufacture.

10.2.3 A certificate/declaration one lot.

10.1 supply Unless otherwise agreed by the purchaser, the paint supplied shall not differ significantly from the ed sample in either composition or performance. 10.2 Vendor’s

sample.

may relate to more than

10.3 Tests 10.3.1 The frequency and procedure to establish compliance of the paint material with this specification may vary depending on the agreement between the purchaser and the supplier.

Certificate

10.2.1 When required by the purchaser, the vendor shall certify that each batch of the paint supplied has been manufactured to the same formula as the ed sample and/or that it has been indicated by

10.3.2 The kind of testing programme Annex G, maybe taken for guidance, appropriate.

as indicated in where thought

ANNEX A

(Clause 2) LIST OF REFERRED Title

IS No.

Title

Colours for ready mixed paints and enamels ~ourth revision) Methods of sampling and test for paints, varnish and related products: Test on liquid paints (general and physical), Section 1 Sampling (third revision) Test on liquid paints (general and physical), Section 2 Preliminary examination and preparation of samples for testing (third revision) and Test on liquid paints (general

(Part 2/See 1): 1988

Test on liquid paints (chemical examination), Section 1 Water content (third revision) Tests on paint film formation, Section 1 Drying time (t~ird revision) Tests on paint film formation, Section 4 Finish (third revision) Tests on paint film formation, Section 5 Fineness of grind (third revision) Optical tests on paint films, Section 1 Opacity (third revision) Optical tests on paint films, Section 2 Colour (third revision) Optical tests on paint films, Section 3 Light fastness test (third revision) Optical tests on paint films, Section 4 Gloss (third revision) Mechanical tests on paint films, Section 1 Hardness tests (third revision)

IS No. 5:1994 101 (Part

l/See

1):

1986

(Part l/See 2): 1987

(Part l/See 3): 1986 (Part l/See 5): 1989 (Part l/See 6): 1987

INDIAN STANDARDS

physical),

Section

3 Preparation

s (third revision) Test on liquid paints physical),

Section

(third revision) Test on liquid physical),

(Part 3/See 4): 1987 (Part 3/See 5): 1987 (Part 4/See 1): 1988 (Part 4/See 2): 1989 (Part 4/See 3): 1988

of

(general

and

5 Consistency

paints

Section

(Part 3/See 1): 1986

(general 6

(third revision) (Part 1/See 7) : Test on liquid paints physical), Section 7 1987 litres (third revision)

Flash

(general Mass

and

(Part 4/See 4): 1988 (Part 5/See 1): 1988

point

and

per 10

6

IS 2932:2003 Title

(Part 5/See 2): 1988

Mechanical tests on paint films, Section2 Flexibility and adhesion (third revision) Durability tests on paint films, Section 1 Resistance to humidity under conditions of condensation (third revision) Durability tests on paint films, Section 2 Keeping properties (third revision) Durability tests on paint films Section 4 Degradation of coatings (pictorial aids for evaluation) Tests for pigments and other solids Section 2 Pigments and non-volatile matter (third revision) Tests for pigments and other solid Section 6 Volume solids Test for lacquers and varnish, Section 2 Rosin test Sulphuric acid (secorrd revision) Laundry soaps (third revision)

(Part 6/See 1): 1988

(Part 6/See 2): 1989 (Part

6/See

4)

1991

(Part

8/See

2):

1990

(Part 8/See 6): 1993 (Part 9/See 2) 1993 266:1993 285:1992

:

Title

IS No.

/S No

296:1986 354 (Part 2) : 1986

513:1994 1017:1983 1070:1992 1303:1983 1407:1980 1745:1978 2074:1992

2552:

989

5661:

970

Sodium carbonate, anhydrous (third revision) Methods of sampling and test for resins for paints : Part 2 Special test methods for alkyd resins (second revision) Cold-rolled low carbon steel sheets and strips ~ourth revision) Chamois leather (second revision) Reagent grade water (third revision) Glossary of relating to paints (second revision) Rpund paint tins (second revision) Petroleum hydrocarbon solvents (second revision) Ready mixed paint, air drying, red oxide-zinc chrome, priming (second revision) Steel drums (galvanized and ungalvanized) (third revision) Code of practice for packing and marking of packages of paints, enamels, varnishes and allied products

ANNEX B

(Clause 6.1.1) TEST METHOD

FOR TOTAL ROSIN ACIDS CONTENT

Libermann storch test for Halphen-Hicks test for detection of rosin also gives coloration with bleeding pigments (for example, Post Office Red) which may be confused with the presence of rosin. If the rosin content estimated by method described below is less than I percent, the paint sample should be considered free from rosin. The proposed method covers the determination of total rosin acids content of rosin esters, varnishes and alkyd resins, unmodified by such materials as maleic or fumaric acid or phenols. Total rosin acids determined include free rosin, esterified rosin and metallic salts of rosin. is primarily

dcsigrwd

containing 0.5 to 5 percent rosinon non-volatile

VEHICLES

with potassium hydroxide-ethylene glycol reagent and acidified with hydrochloric acid. Heat is applied to hydrolyze metallic driers. This is necessary when metallic rosinates are present.

B-O GENERAL

NOTE –- This method

OF COATING

B-O.1.2 The mixture described in B-O. L 1 is extracted with toluene. The rosin and fatty acids and unsaponifiables into the toluene layer. The aqueous layer will contain certain dibasic acids, polyhydric alcohol and other water-soluble products of saponification. B-O.I.3 The toluene is removed by evaporation, the residue weighed and the rosin acids are determined by a selective esterification and titration method.

for material basis.

B-1 APPARATUS

B-O.I Outline of the Method

B-1.1 Air condenser taper t.

B-O.1.1 The sample of separated vehicle is saponified 7

700 mm, with a 24/40 standard

1S 2932:2003 B-1.2 Burette — Automatic type having a capacity of 25 ml, for the standard potassium hydroxide solution, fitted with soda-lime trays to protect against absorption of atmospheric carbon dioxide.

according to details shown 12.7 mm asbestos tape. B-1.7 Pipette — Automatic,

Moisture

Funnels — Three of 1 litre capacity.

Collection

50-ml capacity.

B-2.1 Toluene B-2.2 Butyl Alcohol Sulphuric Acid Esterification Reagent — Add 500 ml of n-butyl alcohol, 500 ml of toluene and 3.3 ml (6 g) of sulphuric acid to a 2-litre round bottom flask with ground t, connect to a moisture trap and condenser and reflux on a hot plate

B-1.5 Steam Bath — Located in a fume hood for evaporation of volatile solvents. B-1.6

Trap — Constructed

E2!-.l *

70*3

1. Wrap with

B-2 REAGENTS

B-1.3 Erlenmeyer Flasks — 250 and 500 ml capacity with 24/40 ground ts. B-1.4 Separating

in Fig.

O/l) 22 APPROX

I 24 /40 GROUND

All dimensions

in millimetres,

FIG. 1 MOISTURECOLLECTIONTRAP 8

IS 2932:2003 inert gas to volume of approximately 20 ml. Add 5 ml of anhydrous ethyl alcohol and evaporate to dryness, to remove any water present by azeotropic distillation.

for 30 min to distil out the water and to form butylsulphuric acid. Cool and store in a glass stoppered bottle. B-2.3 Ethyl Alcohol B-2.4 Hydrochloric

B-3.5 Cool and weigh to the nearest 0.001 g. To avoid oxidation, do not try in an oven, also the retention of a small amount of toluene does not affect the final calculation.

Acid — Concentrated (sp gr 1. 19).

B-2.5 Potassium Hydroxide — Ethylene Glycol Solution (132 g/1)—Dissolve 132 g of potassium hydroxide pellets in 1 Iitre of ethylene glycol in a 2-litre Erlenmeyer flask. Insert a thermometer and boil to eliminate water until the temperature of the liquid reaches 190 to 195°C. Cool and store in a rubber stoppered bottle.

B-3.6 Using an automatic pipette, accurately measure 50 ml of the esterification reagent into the flask. Connect the flask to the moisture collections trays and condenser. Place on a hot plate to boiling and reflux for 20 min. At the end of heating period, allow the flask to cool somewhat, then remove and cool to room temperature.

B-2.6 Potassium Hydroxide, Alcoholic Standard Solution (13.3 g/1) — Dissolve 13.3 g of potassium hydroxide pellets in 1 Iitre of alcohol. Standardize against potassium acid phthallate primary standard. B-2.7 Sulphuric

B-3.7 Add 10 drops of thymol blue indicator solution and titrate with the alcoholic potassium hydroxide solution to a blue end-point.

Acid — Concentrated

a blank solution,

titration on 50 ml of the after refluxing in the same

B-2.8 Thymol Blue Indicator Solution (10 g/1) — Mix 1 g of thymol blue indicator with 100 ml of ethyl alcohol.

B-3.8 Make esterification manner.

B-3 PROCEDURE

B-4 CALCULATION

B-3.1 Transfer to a 500 ml Erlenmeyer flask an amount of sample, weighed to the nearest 0.001 g, containing approximately 10 + 1 g of non-volatile material. Add 150 ml of the potassium hydroxide ethylene glycol solution and swirl to disperse the sample. Add a boiling stone, attach a condenser and reflux on a hot plate for 2 h.

B-4.1 In order to apply properly the esterification correction factors to the isolated rosin acids- fatty acids mixture, it is necessary first to calculate the percent of rosin acids in the dried toluene extract, and then to correct this value to the on-volatile sample basis. Rosin acids in dried toluene extract, y = [(A – B) N x 30.24 x 1.018] & 0.3 percent by mass

B-3.2 After refluxing, remove the flask from the hot plate and cool to room temperature under tap water. Add 100 ml of water and while cooling under tap water, add 40 ml of the hydrochloric acid. Place on the hot plate again, reflux for 5 min and cool under tap water.

where

B-3.3 Transfer the sample quantitatively to a 1 Iitre separating funnel with the aid of a total of 150 ml of water, followed by two 25 ml rinse with toluene. Shake, allow the layers to separate, and draw off the lower aqueous layers into a second 1 Iitre separating funnel. Extract with a third 50-ml portion of toluene. Draw off and discard the water layer. Combine the benzene extracts, and wash with three 50 ml portions of water. Measure the pH of the third water wash. If it is less than 3.8, repeat with a fourth water wash. Discard the wash waters.

A=

alcoholic potassium hydroxide solution required for titration of the sample, in m 1;

B=

alcoholic potassium hydroxide solution required for titration of blank, in ml;

N=

normality of potassium hydroxide solution used;

s.

= molecular mass of abietic acid multiplied by 100 and divided by 1 000;

1.018

determined factor to = experimentally correct for slight esterification of resin acid; and

0.3

B-3.4 Transfer the washed toluene extract to a weighed (to the nearest 0.001 g) 250-ml Erlenmey6r flask, with the aid of 25 ml of toluene. Evaporate the toluene on the steam bath, preferably with the aid of a gentle stream of

mass of dried toluene extract, in g;

30.24

determined factor = experimentally correct for unesterified fatty acids.

Rosin acids in alkyd vehicle, non-volatile

9

basis, percent = (S x Y)/(W x ~

to

IS 2932:2003 where

expressed as a decimal; and Y

S

= mass ofdried

W

= mass of original alkyd vehicle taken for analysis, ing;

T

=

non-volatile

toluene extract, ing;

content

of the

= percent extract.

of resin acids in dried toh.rene

NOTE— [f it is desired to express the total rosin acids as commercial rosin, use 35.00 instead of30.24 as the factor in the calculation.

vehicle,

ANNEX C (Clauses 6.7.1 .1,6.7.1.2,6.7.2.2 TEST METHOD

FOR DURABILITY

C-O GENERAL

a)

Apply one coat of ready mixed paint red oxide-zinc chrome primer (conforming to IS 2074) by brushing afler a coat of undercoat;

b)

Rub down lightly with waterproof emery paper No. 280/320, wipe off the surface using a piece of clean and dry soft cloth and then apply the brushing one coat of the under coating enamel conforming to this standard and allow to air-dry for 24 h;

c)

Rub down, wet, with waterproof emery paper No. 280/320, wipe off the surface using a piece of clean and dry soft cloth and then apply the brushing one coat of the finishing enamel conforming to this standard and allow to air-dry for 24 h; and

d)

Rub down, wet, with waterproof emery paper No. 320, wipe off water and, when the surface is dry, apply by brushing a second coat of the finishing enamel and allow to air dry for 7 days before subjecting to exposure test.

C-O.1 Outline of the Method The durability of the material is determined by ascertaining actual behaviour of suitably prepared test s in normal outdoor exposure test for a specified period and evaluating the results of the exposure by a suitable method of rating for various characteristics of the film of the material. Apart from this, the material is also evaluated by an accelerated weathering test wherein a prepared is subjected to controlled exposure to heat, light and water in the artificial weathering apparatus. C-1 TEST S C-1. 1 The shall be mild steel plate, 1.25 mm thick and free from surface defects (see IS 5 13). s for the outdoor exposure test shall be 300 mm x 300 mm in size and for the accelerated weathering test 150 tmm x 75 mm. The s shall be cleaned as prescribed in IS 10i (Part l/See 3) and the back and edges of the s shall be protected with two coats of a suitable paint. C-2 PREPARATION

and 8.1.1.1)

NOTE —The primer, undercoatandthe finishing enamelsshalt be from the samesource.

OF TEST S

C-3 NORMAL

OUTDOOR

EXPOSURE

TEST

C-3.O Subject the samples for registration and the tender samples, if supplied, to normal outdoor exposure test in the manner described under C-3.1.

C-2. 1 In the painting procedure outlined under C-2.2, the air drying of the films shall be done at room temperature and at a relative humidity of not more than 70 percent.

C-3.1 Expose in the open the test s, prepared in the manner prescribed under C-1 and C-2 in duplicate at an angle of 45° facing South. Commence the exposure not earlier than the third week of January and not later than the first week of April.

C-2.2 The surface of the test s to be exposed shall be prepared as follows, taking care that total dry film thickness of the complete system shall be between 75 and !00 microns:

10

1S 2932:2003 Numerical Value 2tol o

C-3.1.1 Examine the condition of the exposed films at monthly intervals for the first quarter and thereafter quarterly for the rest of the period for the following characteristics:

Type of Colour Change

Rating

Very bad colour change L — Loss of colour Complete colour change

a)

Colour;

b)

Checking,

cracking and flaking;

C-3.2.3 Freedom from Checking

c)

Chalking;

and

d)

Spotting.

Freedom from checking shall be rated as 10 for no checking and Ofor most severe and complete checking. Intermediate ratings of 8, 6, 4 and 2 shall be done by matching with standard photographs.

C-3. 1.2 For the above examinations, wash the right hand half of the surface of the two test s by pouring water and then wiping with a soft cloth or chamois leather (see IS 1017). Adequate time for cooling of the s to room temperature shall be allowed prior to washing examine the same half of the test s at each examination. As an aid in the examination, a magnifying glass may be used, but the evaluation shall be based on an assessment with the unaided eye. At the end of the stipulated period for durability test, examine the two halves of the test s. The sample shall be considered satisfactory if the material surface underneath as wel I as condition of the film in both the halves, the one washed periodically as well as the one washed only for the final examination is satisfactory by the method of evaluation described in C-3.2. Stray film failure, due to extraneous causes other than climate, shall be ignored. C-3.2 Evaluation and Characteristics of Test

Rating

of

C-3.2.4 Freedom from Cracking Freedom from cracking shall be rated as 10 for no cracking and O for most severe and complete cracking. Intermediate ratings of 8, 6,4 and 2 shall be done by matching with standard photographs. C-3.2.5 Freedom from Flaking Freedom from flaking shall berated as 10 for no flaking and O for most severe and complete flaking. Intermediate ratings of 8, 6,4 and 2 shall be done by matching with standard photographs. C-3.2.6 Freedom from Chalking Freedom from chalking shall be rated as 10 for no chalking and O for most severe and complete chalking. Intermediate ratings of 8, 6,4 and 2 shall be done by matching with standard photographs. C-3.2.7 Freedom from Spotting

Film

Freedom from spotting shall be rated as follows: Numerica[ Value 10

C-3.2.1 The test s before and after the specified periods of exposure tests shall be assessed for the various film characteristics as prescribed in C-3.2.2 to C-3.2.8.

9

C-3.2.2 Colour The colour of the test shall be compared against the stipulated shade as given in 1S 5. The initial rating for a good colour match shall be 10. The colour retention on exposure shall be expressed and recorded as the abbreviation of the type of colour change followed by the numerical rating as given below: Rating Numericat Value 10 Good match 9 Satisfactory 8 to 7 Slight colour change 6 to 5 Definite colour change 4 to 3 Bad colour change

No spotting Satisfactory

8-7

Slight spotting

6-5

Definite spotting

4-3

Bad spotting

2-1

Very bad spotting

o

Complete

C-3.2.8 Freedom from Blistering

spotting

and Corrosion

Freedom from blistering shall be rated as 10 for no blistering and O for complete failure in respect of blistering. Intermediate ratings for blister density F, M, MD and D ( few medium, medium-dense and dense) and blister sizes 8,6,4 and 2 shall be done by matching with standard photographs.

Type of Colour Change D— F— B— R—

Rating

Darkening Fading Blueing Reddening

C-3.3 Evaluation

of Exposed Films

C-3.3.1 The requirements of this test shall be taken to have been satisfied if performance in respect of the characteristics as noted in C-3.2 is within the limits specified below:

Y — Yellowing

11

IS 2932:2003

sl No. i)

Characteristic

Exposure

Colour

Requirement

After 3 months

The film shall have a minimum rating of 7 (except for colour categories No. 12, 13, 14, 16, 22, 26 and 27 where the minimum rating shall be 4)

After 6 months

The film shall have a minimum rating of 5 (except for colour categories No. 12, 13, 14, 16,22,26 and 27 where the minimum rating shall be 3)

After 12 months

The film shall have a minimum rating of 4 (except for colour categories No. 12, 13, 14, 16,22,26 and 27 where the minimum rating shall be 2)

Freedom from checking

After 12 months

Minimum rating of 6

iii)

Freedom from cracking

After 12 months

Minimum rating of 8

iv)

Freedom

After 12 months

Minimum rating of 9

ii)

from flaking

v)

Freedom from chalking

After 12 months

Minimum rating of 6

vi)

Freedom from spotting

After 12 months

Minimum rating of 5

C-3.3.2 Freedom from Blisters and Corrosion

used if mutually agreed upon between the purchaser and the supplier. The temperature of water for specimen spray shall be 16 * 5°C. The term cycle is the set of exposure conditions (light, light plus water spray, dark periods) that are repeated.

The film shall remain generally free from blisters and the metal underneath shall show no signs of corrosion on exposure for 12 months. A few isolated blisters without any signs of corrosion underneath as well as one or two localized corrosion andlor rust spots shall not constitute a cause of failure. C-3.4 Protection

C-4.2.3 The exposed film shall be evaluated for gloss and various film properties as prescribed under C-3.2.

Against Corrosion

C-4.2.4 The requirement of this test on a sample from bulk supply shall be taken to have been satisfied if the gloss retention shall be minimum 40 percent of the original and the performance in respect of the other film characteristics is generally similar to that obtained with the ed sample.

After exposure of the film is discontinued, examine for corrosion of the metal surface of the underneath by removing film at 5 different places, one in the centre and one each at 4 different places near the 4 corners about 50 mm away from the edges. The paint film shall be removed by solvent type paint remover. When the film is softened by the paint remover it shall be removed by gently rubbing with cotton swab or waste jute taking care to remove adhering film of primer and/or undercoating. After removal of the film, the exposed metal shall be covered by thick mineral oil or petroleum jelly. Localized corrosion andlor one or two rust spots shall not constitute a cause of failure. To satisfy the requirements of this standard, the metal surface shall be otherwise free from corrosion. C-4 ACCELERATED

WEATHERING

Table 3 Test Cycles Commonly Used for Carbon-Arc Exposure Testing of Paints (Cfause C-4.2.2) Cycle Description

(1) 102 min light

Black Temp, “C

Typical [Jses

(2)

(3)

63 + 2.5 General coatings

18 min light and water spray 18 h using; 102 min light

TEST

General coatings 63*2.5

18 min light and water spray

C-4.1 Accelerated

Weathering

Apparatus

6 h at 95 + 4 percent

An artificial weathering apparatus of the xenonlcarbon arc type for uniform and controlled exposure to the effects of heat, light and water.

75*3

relative humidity with no spray 48 min light

63 + 2,5 Original equipment

12 min light and water spray

C-4.2 Procedure

4 h light

C-4.2. 1 The for this test shall be prepared as described under C-2.2. Samples for registration shall be tested in duplicate in a suitable accelerated weathering apparatus (see C-4.1 ) and samples drawn from the bulk supply shall be tested in a similar manner.

Manufactured

Exterior pigmented

63+ 2.5

Exterior wood stains

4 h water spray 12 h light

coating

63+ 2.5

Paints and clears

12 h water spray 8 h light 10 h light and water spray

C-4.2.2 Commonly used cycles and test conditions are given in Table 3. However, any other cycle may be

6 h water spray

12

63 * 2.5 Marine enamels

IS 2932:2003

ANNEX D

(Clause 6.8) TEST FOR RESISTANCE

D-O GENERAL

TO ACID

with the mass in kg/1 O litres of the material. Protect the edges of the by applying a coat of wax. Allow the to air-dry in a horizontal position for 48 h under specified laboratory drying conditions [see IS 101 (Part 1/See 3)]. Immerse the in a 2 percent (m/v) solution of concentrated sulphuric acid (relative density 1.84) (see IS 266) for 24 h at room temperature. Remove the s, wash in running fresh water and allow to dry for 1 h.

D-O.I Outline of the Method A test coated with the enamel, after specified drying period, is immersed in a definite concentration of sulphuric acid for 24 h after which it is washed, dried and compared in performance with a paneI prepared with the ed sample data. D-1 PROCEDURE

D-1.2 The tested portion shall not show signs of disintegration. The colour shall not vary more than slightly from that of untested portion of the test .

D-1. 1 Apply a coat of the finishing enamel, as specified in2.2of1S 101 (Part 6/See l) ona 150mm x 100mm clean glass to give a dry film mass commensurate

ANNEX E

(Clause 6.9) TEST FOR RESISTANCE

TO ALKALI

of 27 * 2“C. Remove, wash in running water, dry for an hour and examine the film and then subject it to test as prescribed under E-1.2.

E-O GENERAL E-O.1 Outline of the Method The tilm of the material is tested with a solution of laundry soap followed by a solution of sodium carbonate, washed dried and compared in performance with a prepared with the ed sample.

E-1.2 Immerse the in a 2 percent (m/v) solution of sodium carbonate of analytical reagent grade (see 1S 296) for half an hour at a temperature of 27 * 2°C. Remove the , wash in running water, dry for an hour and examine the film.

E-1 PROCEDURE

E-1.3 The tested portion shall not show signs of disintegration. The colour shall not vary more than slightly from that of the untested portion of the test .

E-1.1 Immerse a prepared as prescribed in D-1.1 in a 1 percent (m/v) solution of laundry soap (see Type 1 of IS 285) for half an hour at temperature

13

IS 2932:2003

ANNEX F [Table 2, S1No. (xi)] ACCELERATED

STORAGE

F-1 PROCEDURE F-1.1 Store the paint sample in a closed container and keep at 600C for 96 h.

STABILITY

TEST

original value and there shall be no evidence of seeding. The paint shall meet the drying requirements and produce a film free from streaking, mottling and seeding. Further, for finishing paint, change in gioss value shall not be more than 5 units fi-om that of original value.

500-ml

F-1.2 After the test, paint shall not gel, liver, curdle or increase in viscosity by more than 20 percent of the

ANNEX G

(Clause 10.3.2) TESTING PROGRAMME G-1 When a purchaser orders for supply of paint (conforming to this standard) in lots to be delivered, over a period of time, it is assumed that not all of the tests specified shall be carried out on samples representing of each lot or consignment. The extent and frequency of the tests may vary depending on many factors and on choice of purchaser. The following programme of tests is, however, maybe useful for the guidance of purchasers, particularly in relation to vendor’s certification. It may also provide a usefuI tool to establish a testing programme when an inspecting agency acting on behalf of a purchaser, is required to examine lots of products for compliance to this standard. C-1.1 Programme

f)

Drying time,

g)

Colour,

h)

G1OSS,

j)

Finish, and

k)

Viscosity.

G-1.2 Programme

2

Following tests to be made on first lot and subsequently as and when agreed upon: a)

Flexibility and adhesion,

b)

Scratch resistance,

c)

Acid resistance and alkali resistance.

G-1.3 Programme

1

and

3

Following tests to be made on first lot alone:

Following tests to be made on first lot and on every subsequent lot:

Durability, Keeping qualities,

a)

Non-volatile

b)

Mass per 10 Iitre,

c)

Volume solids percent,

Condition

d)

Phthallic anhydride content of non-volatile vehicle, percent by mass, and

e)

Flash point.

c)

content,

a) b)

in container,

d)

Fineness of grind,

e)

Thinning properties,

14

IS 2932:2003

ANNEX H (F’orewwd) COMMITTEE

COMPOS1TION

Paints, Varnishes and Related Products Sectional Committee, Representative

Organization (14, Orion,

In personal capacity

CHD 20

Oorner Park, Bhulabhai

Desai Road,

SHN RAW ~ARPHAnA

(s)

(Chairman)

,Mumhai 400026) Addisons Paint & Chemicals Asian Paints (India)

SHRI R. SRtNIVASAN

Ltd, Chennai

SHRI A. B. MENON

Ltd, Mumbai

DR B. P. MALJK (Alternate) Bajaj Auto Limited,

REPfti3E~A~

Pune

Bcrger Paints India Ltd, Howrah

SHRI K. NIRMALKUMAR

Bharat Heavy Electrical

SHRI M, SOMU

SHRIN. K. RAY (Alternate)

Central Building

Ltd, Tiruchirapalli

DR L. K. AGARWAL

Research Institute, Roorkec

DR K. K. ASTHANA(Alternate) Central Poblic Works Department, Colour-Chem

Limited,

REPRESEFWATIW

New Delhi

SHRI R. R. VAIDYA

Thane

Consumer Unity & ‘rurst Society (CUTS),

Jaipur

Strru SANOEEPSINGH

Continental

Coatings Pvt Ltd, Chennai

SHRI M. B. SATVANARAYANA

Directorate

Gcnmal

REPRESENTAITVE

of Supplies & Disposals, New Delhi

Export Inspection

Council

Goodlass Nerolac

Paints Ltd, Mumbai

Hindustan Shipyard

REPRESENTATIVE

of India, Ncw Delhi

SHRI S. V, PORWAL SHRI P. V. RAMANAMURTHY

Ltd, Visakhapatmrm

SHRI A. P. CH. N. PRASAD(Alternate) ICI (India)

ltd.

REPRESENTATIVE

Kolkata

[ndian Institute ot’ Chem Technology, Indian Paints Association,

DR K. V. S. N. RAIU

Hyderabad

DR M, B. GUHA

Kolkata

SHRI V. M. NATU (Ahernate) Indian Petrochemicals

Indian Small Scale Paint Association, Jensen & Nicholson Maruti

REPRESEmATIVE

Corp Ltd, Vadodra

(India)

REPRESENTATIVE

Mumbai

Ltd, Gorifa,

24 Pargtmas (N), West Bengal

SHRIT. K. BANERJEE

Lldyog Ltd, Gurgaon

Ministry

REPRE.5E~A~E

of Defence (DGQA),

SHRI M. S. SULTANtA

Kanpur

SHRI L. S. MISHRA(A/[ernate) Ministry

of Environment

Ministry

of Industry,

Mumbai

Paints Limited,

REPREsE~Amw

& Forest, New Delhi

SHFOP. K. JAIN

New Delhi

SHIUN. C. TIWAtU (Ahernate) REPmsE~,4~

Mumbai

National

Organic Chemical

National

Test House (ER),

Industries Ltd, Mumbai

DR B. V. BAPAT DR B. B. PAL

Kolkata

DR SUNtLKUMARSAHA (Ahernafe) Ollice

of the DevIopment

office

of the Scientific

Commissioner (SS1), New Delhi

Adviser

to Chief Naval

Oil and Natural Gas Corporation Oil ‘Technologists Association

StatY, New Delhi

Ltd, New Delhi

of India, Kanpur

SHSOY. S. BHATNAGAR SHRI A. K. JAIN (Alternate) SHRI R, K. SEHGAL REPRESENTATIVE REPRESENTAWE

(Corrfinued on page 16)

IS 2932:2003 (Continued jrom page

15) Representative(s)

Organization Punjab Paint Colour

and Varnish

Works,

Research Designs & Standards Organization, Resins & Plastics Limited,

REPREsE14TATlvE

Lucknow

SHRI M. C. CHOKSI

Mumbai

Shriram institute forlndustrial Sudarshan Chemicals

SHRI G. N. TIWARI

Kanpur

Research, Delhi Ssuu SUDHIRH. HARSULE

hrdustries Ltd, Pune

Smu MAHESHD. METTELLDO(Alternate) Tata Engineering

& Locomotive

The Indian Turpentine Travancore

Titanium

REPRESE~A~

Co Ltd, Jamshedpur

SHRI R. C. BASSI

& Rosin Co Ltd, Bariely

SHRI V. S. BASHIR

Products Ltd, Triruvananthapuram

DR K. GOPINATHAN NAIR (Ahernate) U. K. Paints industries, BIS Directorate

SHRI V. K. NAYYAR

New Delhi

SHRI S. K. CHAUDHORI,Director&

General

Head (CHD)

[Representing Director General (Ex-off7cio)]

Member Secretary SHRIN. K. BANSAL t Director (CHD),

16

BIS

Bureau of Indian Standards institution established under the Bureau 131S is a statutory harmonious development of the activities of standardization, and attending to connected matters in the country.

of Zndian Standards Act, 1986 to promote marking and quality certification of goods

Copyright Bl S has the copyright of all its publications. No part of these publications may be reproduced in any form without the prior permission in writing of BIS. This does not preclude the free use, in the course of implementing the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright be addressed to the Director (Publications), BIS. Review of’ Indidn Standards Amendments are issued to standards as the need arises on the basis periodically; a standard along with amendments is reaffirmed when needed: if the review indicates that changes are needed, it is taken should ascertain that they are in possession of the latest amendments ‘BIS Catalogue’ and ‘Standards: Monthly Additions’. This Inciian Standard has been developed

from Doc : No. CHD 20 (946).

Amendments Amend No.

of comments. Standards are also reviewed such review indicates that no changes are up for revision. s of Indian Standards or edition by referring to the latest issue of

Issued Since Publication Date of Issue

Text Affected

BUREAU OF INDIAN STANDARDS Headquarters

:

Manak Bhavan, 9 Bahadur Shah Zafar Marg, New DeIhi 110002 Telephones :23230131,23233375,2323 9402 Regional Offices :

Telegrams : Manaksanstha (Common to all offices) Telephone

Central

: Manak Bhavan, 9 Bahadur Shah Zafar Marg NEW DELHI 110002

Eastern

: 1/1 4 C.I.T. Scheme VII M, V. L P. Road, Kankurgachi KOLKATA 700054

Northern

: SCO 335-336, Sector 34-A, CHANDIGARH

Southern

: C.I.T. Campus, IV Cross Road, CHENNAI 600113

22541216,22541442 22542519,22542315 {

Western

: Manakalaya, E9 MIDC, Marol, Andheri (East) MUMBAI 400093

128329295,28327858 128327891,28327892

Branches

23237617 { 23233841

160022

23378499,23378561 { 23378626,23379120 603843 { 609285

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