Aqueous two-component polyurethane-forming compositions and...

Details Aqueous two-component polyurethane-forming compositions and... Aqueous two-component polyurethane-forming compositions and...

C - Chemistry, Metallurgy

08

L

C08L 75/04 (2006.01) C08J 5/08 (2006.01) C08K 7/14 (2006.01)

Patent

CA 2072693

The present invention is directed to a process for the preparation of an aqueous two-component polyurethane- forming composition by a) dispersing in water a polyisocyanate which has an isocyanate content of at least 12% by weight and b) also blending with water either before, during or after dispersing the polyisocyanate, a polyhydroxyl compound which i) has a molecular weight of 62 to 10,000, ii) contains at least two hydroxyl groups, iii) is water soluble or water dispersible, iv) does not contain urea or urethane groups and v) is selected from the group of polyesters, polylactones, polycarbonates, polyethers, polythioethers, polyacetals, polyether esters, polyester amides and polyamides, wherein the equivalent ratio of isocyanate groups to aqueous groups is 0.8:1 to 6:1. The present invention is also directed to the aqueous composition prepared by this process and to its use as a binder for fiberglass.

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