Patent ID: 7632911

Claim:
A liquid, storage-stable diisocyanate having an NCO group content of 11 to 32% by weight, and comprising the reaction product of: (A) a diphenylmethane diisocyanate which comprises: (1) from 0 to 6% by weight of the 2,2′-isomer, (2) from 0 to 60% by weight of the 2,4′-isomer, and (3) from 34 to 100% by weight of 4,4′-isomer, wherein the sum of the %′s by weight of (1), (2) and (3) totals 100% by weight of (A) the diphenylmethane diisocyanate; with (B) at least one compound selected from the group consisting of: (1) compounds which contain both an amide group and a hydroxyl group, and correspond to the structure: wherein: R 1 : represents an alkyl radical containing from 1 to 20 carbon atoms, a cycloalkyl radical containing 5 to 6 carbons, or an aryl radical containing 6 carbons; and R 2 : represents an alkyl radical containing from 1 to 12 carbon atoms; and (2) compounds which contain both an amide group and a hydroxyl group, and correspond to the structure: wherein: R 3 : represents an alkyl radical containing from 1 to 16 carbon atoms, a cycloalkyl radical containing 5 to 6 carbons, or an aryl radical containing 6 carbons, and R 4 : represents an alkyl radical containing from 1 to 12 carbon atoms; in the presence of one or more catalysts.