Use of polydiene diols in resilient polyurethane foams

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/69 (2006.01) C08G 18/62 (2006.01) C08J 9/04 (2006.01)

Patent

CA 2224737

Polyurethane foams having high resilience and significantly improved humid ageing are formed from a polydiene diol, preferably a hydrogenated polybutadiene diol, having a hydroxyl functionality from 1.6 to 2.0 and from an aromatic polyisocyanate having an isocyanate functionality of from 2.5 to 3Ø The polydiene diol is preferably blended with foaming agents prior to addition of the highly reactive polyisocyanate.

La présente invention se rapporte à des mousses de polyuréthane présentant une grande souplesse et un vieillissement par voie humide amélioré de façon significative. Lesdites mousses sont formées, de préférence, à partir d'un diol de polydiène, de préférence un diol de polybutadiène hydrogéné, comportant une fonctionnalité hydroxyle de 1,6 à 2,0, et à partir d'un polyisocyanate aromatique comportant une fonctionnalité de 2,5 à 3,0. De préférence, le diol de polydiène est mélangé avec des agents moussants avant d'être ajouté au polyisocyanate hautement réactif.

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