Flexible elastomeric thermoplastic polyurethanes, process...

Details Flexible elastomeric thermoplastic polyurethanes, process... Flexible elastomeric thermoplastic polyurethanes, process...

C - Chemistry, Metallurgy

08

L

400/4302, 400/55

C08L 75/04 (2006.01) C08G 18/66 (2006.01) C08J 5/18 (2006.01) C08K 5/12 (2006.01) C08K 5/523 (2006.01)

Patent

CA 1257946

FLEXIBLE ELASTOMERIC THERMOPLASTIC POLYURETHANES, PROCESS FOR THEIR PREPARATION AND THEIR USE Abstract of the Disclosure Soft, flexible elastic, thermoplastic poly- urethanes contain as plasticizers phthalic acid bis(methoxy- ethyl ester), tricresyl phosphate, diphenylcresyl phosphate, and polyester polyurethanes having molecular weights from 4000 to 10,000 based on 1,4'-butanediol adipate and 4,4'- diphenylmethane diisocyanate, generally in amounts from 1 to 50 weight percent. The plasticizers can be incorporated into the starting components used for preparing the poly- urethane, into the reactable polyurethane mixture during preparation, or, preferably, into the resulting thermo plastic polyurethanes. The products are suitable for preparing sheets and molded parts, for example, pipes/tubing and profiles, and preferably for sealing profiles.

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