KR series silicone resin

Shin-Etsu KR Series Silicone Resin is a range of cross-linking silicone resins used as the primary film former or as a modifier for heat-resistant paints and insulating varnishes. Once cured, the resin forms a hard film with a heat-stable Si-O backbone that retains adhesion and electrical insulation at temperatures where conventional organic resins would decompose.

Typical Applications

• Heat-resistant paints for exhaust pipes, kilns, drying ovens and industrial stoves
• Insulating impregnation varnish for Class H motor and transformer windings
• Binder for mica sheets, thermal insulation materials and composites
• Heat-resistant non-stick coatings for molds and bakeware
• Modifying alkyd and polyester resins to improve weather resistance

Advantages

1. Withstands 250 °C continuously, and higher short-term when formulated with aluminum powder
2. Good, stable electrical insulation at high temperatures, with low moisture absorption
3. Weather resistant, retains color and gloss with minimal chalking
4. Compatible with many organic resins to tailor film properties

Key Specifications

Application Notes

Thin with xylene or toluene to a viscosity suited to spraying, dipping or brushing. Metal surfaces should be sandblasted or thoroughly degreased. Flash off the solvent at a low temperature before ramping up to the cure temperature to avoid pinholes. Apply in a well-ventilated area and wear respiratory protection.

A dry film thickness of 20–30 µm per coat is optimal; overly thick films are prone to cracking under thermal cycling.

Contact the technical team at AMS Vietnam for advice on paint formulation, samples and packaging options.