Low-density rrim having improved coefficient of linear...

Details Low-density rrim having improved coefficient of linear... Low-density rrim having improved coefficient of linear...

C - Chemistry, Metallurgy

08

L

C08L 75/08 (2006.01) B29C 67/24 (2006.01) C08G 18/50 (2006.01) C08J 9/08 (2006.01) C08K 7/10 (2006.01) C08K 7/14 (2006.01)

Patent

CA 2204539

The invention pertains to a low weight, low density rigid polyurethane-polyurea reinforced reaction injection molded (RRIM) part having flaked glass, reinforcing fibers dispersed throughout a matrix made by reacting polyisocyanates with a resin containing hydroxy group tertiary amine polyether polyols, a blowing agent, and optionally surfactants, chain extenders, and urethane promoting catalysts. The low density RRIM part using flaked glass and the tertiary amine polyether polyols is a low cost alternative to glass fiber reinforced low density parts and the part exhibits a relatively low coefficient of linear thermal expansion and relatively high temperature deflection properties as compared to other known fillers.

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