Overview:
This document provides a comprehensive chemical resistance rating table for various rubber materials used in the innerliner of expansion joints manufactured by Trelleborg Expansion Joints. The ratings indicate the suitability of different rubber types when exposed to specific chemicals at ambient temperature unless otherwise stated.

Rating Codes

• A (Excellent): Highly suitable for use with the chemical.
• B (Good): Suitable with minor limitations.
• C (Conditional): Use with caution; may require special considerations.
• X (Inappropriate): Not recommended for use.
• – (Please ask): Further consultation required.

Rubber Materials Evaluated

The table covers the following rubber types:

• EPDM
• Chloroprene (Neoprene)
• Nitrile
• Hypalon
• Butyl
• SBR (Styrene-Butadiene Rubber)
• Viton (Fluoroelastomer)
• Teflon (PTFE)
• Natural Rubber
• Epichlorohydrin

Chemical Resistance Summary

The document lists numerous chemicals including acids, solvents, oils, gases, and other industrial chemicals, with their concentration and temperature conditions where applicable. Key points include:

• Acids: Concentrated acids such as hydrochloric, nitric, sulfuric, and chromic acids generally show poor compatibility (ratings often X or C) with most rubbers except Viton and Teflon, which perform better.
• Organic Solvents: Chemicals like acetone, benzene, toluene, and various ketones are mostly rated as inappropriate (X) for many rubbers, with Viton and Teflon showing better resistance.
• Alcohols and Glycols: Ethanol, methanol, ethylene glycol, and glycerine generally have good to excellent compatibility (A or B) with most rubber types.
• Oils and Fuels: Diesel, fuel oil, lubricating oils, and petroleum-based products show variable compatibility; nitrile and Viton often perform better, while natural rubber and SBR are less resistant.
• Gases: Ammonia gas (cold) is well tolerated by most rubbers, but hot ammonia gas shows reduced compatibility. Chlorine gas and sulfur dioxide generally have poor compatibility except with Viton and Teflon.
• Other Chemicals: Detergents, beer, milk, and sugar solutions show excellent compatibility across most materials.

Limitations and Recommendations

• The ratings apply primarily at ambient temperature; for other temperatures, consultation with Trelleborg is advised.
• The table is a guideline and does not constitute a guarantee or warranty by Trelleborg Expansion Joints.
• For chemicals or conditions marked with “–”, users should contact Trelleborg for specific advice.
• Material selection should consider chemical concentration, temperature, and exposure duration.

Contact Information

For further information or specific inquiries, contact Trelleborg IESA, s.a., located in Izarra (Alava), Spain. Phone: +34 945 437 090, Fax: +34 945 437 050, Email: [email protected] or [email protected]. Websites: www.teguflex.com and www.trelleborg.com/iesa.