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Cleaners Remove Silicone Deposits from Industrial Equipment and Surfaces Case Study: Dow Corning® DS-2025 Silicone Cleaning Solvent and Dow Corning® DS-1000 Aqueous Silicone Cleaner Project Demonstrate the removal of cured and uncured silicone from substrates.

Products Dow Corning ® DS-2025 Silicone Cleaning Solvent Dow Corning ® DS-1000 Aqueous Silicone Cleaner

Figure 1

Silicones are widely used in various products and in manufacturing processes, and good cleaning practices can help you reduce the risk of microbial or chemical contamination in finished products, reduce the likelihood of buildup-related equipment failures, and contribute to good industrial hygiene and worker safety. Dow Corning offers two products for the easy removal of silicone deposits on tools, kettles, bottling lines, pipes, manufacturing equipment, floors and other surfaces: Dow Corning ® DS-2025 Silicone Cleaning Solvent for removing cured silicones and Dow Corning ® DS-1000 Aqueous Silicone Cleaner for removing uncured silicones.

Using Dow Corning ® DS-2025 Silicone Cleaning Solvent to remove cured silicone To demonstrate the cleaning effect of Dow Corning ® DS-2025 Silicone Cleaning Solvent, a plastic pipe was coated with XIAMETER® RSN-0749 Resin – a curable silicone that, on evaporation of the cyclomethicone, forms a cured film of highmolecular-weight silicone resin. The silicone was applied to the outside of the pipe rather than the inside (Figure 1) so the cleaning can be seen more effectively. The pipe was left to stand in Dow Corning ® DS-2025 Silicone Cleaning Solvent overnight at room temperature (Figure 2). It was then rinsed with water and dried to yield a clean pipe (Figure 3).

Figure 2

Recommended procedure for using Dow Corning ® DS-2025 Silicone Cleaning Solvent to remove cured silicone from industrial equipment: 1. Silicone digestion - Drain tanks and lines from a maximum of residue and water (0.5% maximum). - Fill tanks and lines with Dow Corning ® DS-2025 Silicone Cleaning Solvent. - Ventilation is required. A nitrogen blanket is not required but may be used as an additional safety measure if working at 60°C.

Figure 3

- Recirculate Dow Corning ® DS-2025 Silicone Cleaning Solvent at room temperature (or up to 60°C) until dissolution of residue is effective. Typically, this takes one to four hours. - Note that no impact of Dow Corning ® DS-2025 Silicone Cleaning Solvent on stainless steel 304 and 316 has been detected. Additionally, no impact has been detected on Teflon®, Viton®, nitrile, polyethylene, polypropylene or EPDM gaskets, seals and ts, as well as ABS and PET. However, Dow Corning ® DS-2025 Silicone Cleaning Solvent will affect nylon, butyl rubber, polyurethane and silicone gaskets, seals and ts. … continued on back

2. Degreasing

Further information

- Drain Dow Corning ® DS-2025 Silicone Cleaning Solvent from unit and refill container for next use.

To request samples of Dow Corning ® DS-2025 Silicone Cleaning Solvent or Dow Corning ® DS-1000 Aqueous Silicone Cleaner or to obtain information for your local sales/technical representatives or distributor, visit dowcorning.com/SiliconeCleaning.

- Start CIP cleaning with 10% Dow Corning ® DS-1000 Aqueous Silicone Cleaner to solubilize and remove solvent residue. 3. Sanitization - Perform final sanitization according to customer standard practice.

Using Dow Corning ® DS-1000 Aqueous Silicone Cleaner to remove uncured silicone To demonstrate the cleaning effect of Dow Corning ® DS-1000 Aqueous Silicone Cleaner, some XIAMETER® PMX-200 Silicone Fluid, 350 CS – a typical uncured silicone – was poured Figure 4 onto a floor (Figure 4).

Figure 5

Figure 6

The bulk of the spill was cleaned up using paper tissue to leave a residue of silicone on the floor (Figure 5). The floor was then cleaned with a 10% aqueous solution of Dow Corning ® DS-1000 Aqueous Silicone Cleaner to give a clean surface (Figure 6). Recommended procedure for using Dow Corning ® DS-1000 Aqueous Silicone Cleaner to remove uncured silicone from industrial equipment: 1. Degreasing - Drain any residues from unit. - Fill unit with a 10% aqueous solution of Dow Corning ® DS-1000 Aqueous Silicone Cleaner. - Heat up to 80°C and recirculate using the CIP cleaning procedure to solubilize and remove silicone residues. Recirculate through piping and spray nozzle-ball where relevant. 2. Sanitization - Drain off Dow Corning ® DS-1000 Aqueous Silicone Cleaner solution. - Perform final sanitization according to customer standard practice.

Photos: Page 1 - AV19391, AV19396, AV19397; Page 2 - AV19389, AV19392, AV19394. HANDLING PRECAUTIONS PRODUCT SAFETY INFORMATION REQUIRED FOR SAFE USE IS NOT INCLUDED IN THIS DOCUMENT. BEFORE HANDLING, READ PRODUCT AND MATERIAL SAFETY DATA SHEETS AND CONTAINER LABELS FOR SAFE USE, PHYSICAL AND HEALTH HAZARD INFORMATION. THE MATERIAL SAFETY DATA SHEET IS AVAILABLE ON THE DOW CORNING WEBSITE AT DOWCORNING.COM, OR FROM YOUR DOW CORNING SALES APPLICATION ENGINEER, OR DISTRIBUTOR, OR BY CALLING DOW CORNING CUSTOMER SERVICE. LIMITED WARRANTY INFORMATION – PLEASE READ CAREFULLY The information contained herein is offered in good faith and is believed to be accurate. However, because conditions and methods of use of our products are beyond our control, this information should not be used in substitution for customer’s tests to ensure that our products are safe, effective and fully satisfactory for the intended end use. Suggestions of use shall not be taken as inducements to infringe any patent. Dow Corning’s sole warranty is that our products will meet the sales specifications in effect at the time of shipment. Your exclusive remedy for breach of such warranty is limited to refund of purchase price or replacement of any product shown to be other than as warranted. DOW CORNING SPECIFICALLY DISCLAIMS ANY OTHER EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY. DOW CORNING DISCLAIMS LIABILITY FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES. Dow Corning is a ed trademark of Dow Corning Corporation. XIAMETER is a ed trademark of Dow Corning Corporation. We help you invent the future is a trademark of Dow Corning Corporation. Teflon and Viton are ed trademarks of E. I. du Pont de Nemours and Company. ©2012 Dow Corning Corporation. All rights reserved. Printed in USA

AGP12376

Form No. 26-1881-01