Liquid isocyanate prepolymers

Details Liquid isocyanate prepolymers Liquid isocyanate prepolymers

C - Chemistry, Metallurgy

08

G

402/154

C08G 18/32 (2006.01) C08G 18/50 (2006.01) C08G 18/76 (2006.01) C08G 18/80 (2006.01)

Patent

CA 2001254

Mo3134 PU-273A 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 3 to 30% by weight, prepared by reacting i) an isocyanate selected from the group consisting of methylene bis(phenylisocyanates), polymethylene poly(phenylisocyanates), and mixtures thereof, and ii) a polyamine of the structure Image where R represents an m-valent residue obtained by the removal of m-functional groups from a compound having m-functional groups and having a molecular weight of from 76 to about 10,000, X represents -O-, Image , Image , -S-, or Image R1 represents hydrogen or an inert substituent, R2 represents hydrogen, a C1 to C5 alkyl group or a phenyl group, n is 1 or 2, and m is an integer of from 2 to 8.

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