Process for preparing rigid and flexible polyurethane foams

Details Process for preparing rigid and flexible polyurethane foams Process for preparing rigid and flexible polyurethane foams

C - Chemistry, Metallurgy

08

G

C08G 18/66 (2006.01) B29C 44/56 (2006.01) C08G 18/65 (2006.01)

Patent

CA 2268179

Process for preparing a rigid and a flexible polyurethane foam by reacting a polyisocyanate and two different polyols under foam forming conditions, the polyisocyanate being reacted with said polyols in the absence of compounds comprising primary, secondary or tertiary amines. Flexible foams are obtained which do not show a major glass transition temperature between -100 ~C and +25 ~C.

Dans un procédé de préparation d'une mousse rigide ou souple de polyuréthane, on fait réagir un polyisocyanate et deux polyols différents dans des conditions de formation de mousse, la réaction du polyisocyanate et desdits polyols s'opérant en l'absence de composés comprenant des amines primaires, secondaires ou tertiaires. On obtient des mousses souples sans température majeure de transition vitreuse entre -100 ·C et +25 ·C.

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