Polyisocyanates containing allophanate and isocyanurate groups,

Details Polyisocyanates containing allophanate and isocyanurate groups, Polyisocyanates containing allophanate and isocyanurate groups,

1992-05-06

1993-08-10

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 59, 528 67, 528 73, 544193, 544196, C08G 1808

Patent

active

052350185

ABSTRACT:
The present invention is directed to a polyisocyanate mixture having an NCO content of 10 to 47% by weight and a viscosity of less than 10,000 mPa.s and containing isocyanurate and allophanate groups in a molar ratio of monoisocyanurates to monoallophanates of 10:1 to 1:5, wherein the allophanate groups are formed from urethane groups which are based on the reaction product of an organic diisocyanate having (cyclo)aliphatic bound isocyanate groups and a monoalcohol containing at least 10 carbon atoms and having a molecular weight of 158 to 2500.
The present invention is also directed to a process for the production of a polyisocyanate mixture having an NCO content of 10 to 47% by weight, having a viscosity of less than 10,000 mPa.s and containing isocyanurate and allophanate groups in a molar ratio of monoisocyanurates to monoallophanates of 10:1 to 1:5 by

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patent: 4647623 (1987-03-01), Kase et al.
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patent: 5086175 (1992-02-01), Minato et al.

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