Polyisocyanate prepolymer composition and soft elastomers...

Details Polyisocyanate prepolymer composition and soft elastomers... Polyisocyanate prepolymer composition and soft elastomers...

C - Chemistry, Metallurgy

08

G

C08G 18/76 (2006.01) C08F 290/00 (2006.01) C08F 290/06 (2006.01) C08F 290/14 (2006.01) C08G 18/08 (2006.01) C08G 18/10 (2006.01) C08G 18/48 (2006.01) C08K 5/12 (2006.01)

Patent

CA 2232354

A polyisocyanate prepolymer composition which comprises the reaction product of a) diphenylmethane diisocyanate composition and b) an active hydrogen containing compound having a number average molecular weight of at least about 2000 wherein the reaction is carried out in the presence of a diluent capable of maintaining the average viscosity of the resulting prepolymer below about 500 cps at 25° C. The prepolymer may be reacted with a resin composition to prepare soft elastomers.

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