Patent ID: 6838542

Claim:
A stable liquid biuret modified diphenylmethane diisocyanate comprising a secondary amine based biuret modified diphenylmethane diisocyanate having an NCO group content of 12 to 30% by weight, comprising: (a) a secondary monoamine group containing compound which may be aliphatic, aromatic or araliphatic; and (b) diphenylmethane diisocyanate having an NCO group content of about 33.6% and comprising: (i) from 0 to 60% by weight of 2,4′-diphenylmethane diisocyanate, (ii) less than 6% by weight of 2,2′-diphenylmethane diisocyanate, and (iii) the balance being 4,4′-diphenylmethane diisocyanate, wherein the %'s by weight of (b)(i), (b)(ii) and (b)(iii) total 100% by weight of (b).