Liquid isocyanate prepolymers

Details Liquid isocyanate prepolymers Liquid isocyanate prepolymers

C - Chemistry, Metallurgy

07

C

260/455.3

C07C 275/40 (2006.01) C08G 18/10 (2006.01) C08G 18/50 (2006.01) C08G 18/76 (2006.01) C08G 18/78 (2006.01) C08G 18/80 (2006.01)

Patent

CA 1317310

Mo-3048 LIQUID ISOCYANATE PREPOLYMERS ABSTRACT OF THE DISCLOSURE The present invention is directed to a liquid storage-stable isocyanate prepolymer having an isocyanate group content of from 10 to 30% by weight prepared by reacting: i) a polyamine containing at least two aromatically bound primary amino groups prepared by hydrolyzing an isocyanate compound having an isocyanate group content of from 0.5 to 40% by weight, with ii) an isocyanate mixture comprising a) from 50 to 100% by weight of diphenyl- methane diisocyanates if which from 3 to 50% by weight consist of 2,2'- and 2,4'-isomers, and b) the balance being polyphenylpolymethylene polyisocyanates, with the proviso that if said mixture comprises form 95 to 100% by weight of diphenylmethane diisocyanate, at least 15% by weight of said diisocyanate consisting of the 2,2'- and 2,4'- isomers. MO-3048

596322

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