Polyurethane foams

Details Polyurethane foams Polyurethane foams

C - Chemistry, Metallurgy

08

G

C08G 18/48 (2006.01) C08G 18/22 (2006.01) C08G 18/40 (2006.01) C08G 18/63 (2006.01) C08G 18/76 (2006.01) C08G 18/79 (2006.01)

Patent

CA 2158648

A method for the preparation of flexible polyurethane foams by reacting a polyisocyanate containing at least 85 % by weight of 4,4'- diphenylmethane diisocyanate or a liquid variant thereof with a polyol composition comprises at least one poly(oxyethylene-oxyalkylene) polyol, the composition having an average nominal hydroxyl functionality of from 2.5 to 6, a number average hydroxyl equivalent weight of from 1000 to 3000 and an average oxyethylene content of from 25 to less than 50 % by weight and with water.

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