C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/75 (2006.01) C07D 251/34 (2006.01) C08G 18/78 (2006.01) C08G 18/79 (2006.01)
Patent
CA 2125237
The present invention is directed to a polyisocyanate mixture which i) has an NCO content of 5 to 47% by weight, ii) is prepared from an isocyanate component substantially containing one or more cyclic organic diisocyanates having (cyclo)aliphatically-bound isocyanate groups and iii) contains isocyanurate and allophanate groups in a molar ratio of monoisocyanurates to monoallophanates of 10:1 to 1:10, wherein the allophanate groups are formed from urethane groups which are based on the reaction product of an organic diisocyanate having (cyclo)aliphatically bound isocyanate groups and a monoalcohol containing at least 1 carbon atom and having a molecular weight of up to 2500. The present invention is also directed to a process for the production of these polyisocyanate mixtures and to their use, optionally in blocked form, as an isocyanate component in two-component coating compositions.
Jacobs Patricia B.
Wicks Douglas A.
Corporation Bayer
Miles Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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