New flexible polyurethane foams

Details New flexible polyurethane foams New flexible polyurethane foams

C - Chemistry, Metallurgy

08

J

C08J 9/08 (2006.01) C08G 18/09 (2006.01) C08G 18/65 (2006.01) C08G 18/66 (2006.01) C08J 9/38 (2006.01)

Patent

CA 2218288

Process for preparing a flexible polyurethane foam by reacting a polyisocyanate and two different polyols under foam forming conditions so as to prepare a rigid foam and by crushing the rigid foam so obtained. Flexible foams are obtained which do not show a major glass transition temperature between -100 °C and +25 °C.

Procédé de préparation de mousse polyuréthanne souple qui consiste à faire réagir un polyisocyanate et deux polyols différents dans des conditions de formation de mousse, de manière à préparer une mousse rigide, et à écraser la mousse ainsi obtenue. On obtient des mousses souples qui ne présentent pas une température majeure de transition vitreuse située entre -100 DEG C et +25 DEG C.

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