Mixts. of aliphatic non alpha, omega di:isocyanate(s) - with other di:isocyanate(s), useful e.g. for polyurethane coating compsns.

摘要

Mixt. of 2 or more diisocyanates is claimed comprising (A) an aliphatic diisocyanate of formula (I) in which R1 is chosen from (i) alkyl with 1 or more C, (ii) opt. substd. phenyl and (c) a gp. R1''-O-R1'- in which R1' and R1'' are 1-10 C alkyl, and R2, R3 and R4 are chosen from (a) alkyl with 1 or more C, (b) alkoxy with 1 or more C and (c) H, and (B) another diisocyanate (II). Pref. (I) is 1,5-hexanediisocyanate and (II) is an aromatic dissocyanate, esp. MDI and/or TDI. Also claimed are oligomers of the isocyanate mixts., and adducts of the isocyanate mixts. with a cpd. having at least one active H atom. Pref. the mol. ratio (I); (II) in the isocyanate mixt. = 1:20 to 20:1, esp. 3:2 - 2:3.