Patent ID: 7666971

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) amides which correspond to the structure: wherein: R: represents a hydrogen atom, an alkyl radical containing from 1 to 6 carbon atoms, a cycloalkyl radical containing from 5 to 6 carbon atoms, or an aryl radical containing 6 carbon atoms; and R 1 : represents a hydrogen atom, an alkyl radical containing from 1 to 6 carbon atoms, a cycloalkyl radical containing from 5 to 6 carbon atoms, an aryl radical containing 6 carbon atoms, or an alkoxy radical; with the proviso that R and R 1 do not simultaneously represent hydrogen; (2) bisamides which correspond to the structure: wherein: each R 2 : independently represents a hydrogen atom, an alkyl radical containing from 1 to 6 carbon atoms, a cycloalkyl radical containing 5 or 6 carbon atoms, an alkoxy radical, or an aryl radical containing 6 carbon atoms; and R 3 : represents an alkyl radical containing from 1 to 12 carbon atoms or a cycloalkyl radical containing 6 carbon atoms; and (3) cyclic ureas which correspond to the structure: wherein: n: represents from 2 to 5 methylene groups; in the presence of one or more catalyst.