Crystalline, grindable polyurethane polymers

Details Crystalline, grindable polyurethane polymers Crystalline, grindable polyurethane polymers

C - Chemistry, Metallurgy

08

G

402/140, 260/455

C08G 18/80 (2006.01) C08G 18/12 (2006.01) C08G 18/28 (2006.01) C08G 18/66 (2006.01)

Patent

CA 1188316

Abstract of the Disclosure A crystalline grindable end-blocked prepolymer useful in providing a polyurethane elastomer having a 100% modulus less than approxi- mately 250 psi, tensile of 3500 to 6500 psi, and less than 30% initial tensile set, said prepolymer being the product of reacting an organic polyisocya- nate, a long chain crystalline diol having an average molecular weight of approximately 50? to 5000, a polyhydroxy cross-linking agent, and an end-blocking agent.

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