C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
400/106, 402/3,
C07C 271/08 (2006.01) C08G 18/10 (2006.01) C08G 18/64 (2006.01) C08G 18/80 (2006.01) C09D 5/44 (2006.01) C09D 175/04 (2006.01)
Patent
CA 1334960
A curing agent (A) for resins (B) which can be cured by means of isocyanates, which has an amine number of 20 to 150 mg of KOH/g and an OH number of not more than 20 mg of KOH/g and which contains per molecule at least two masked isocyanate groups which are reactive under the conditions of curing, obtained by reacting (a) an amine which contains at least one .beta.-hydroxyalkyl group per molecule and has an OH number of 100 to 1,200 mg of KOH/g and an amine number of 100 to 1,200 mg of KOH/g and which, if appropriate, also contains NHCO groups, if appropriate as a mixture with another OH-functional and/or NH-functional compound, with (b) a partly masked isocyanate, if appropriate as a mixture with an at least difunctional, OH-reactive and/or NH-reactive compound. These curing agents are readily dispersible in aqueous systems, if appropriate after neutralization, and frequently increase stability in aqueous paint formulations.
594408
Finke Manfred
Honel Michael
Walz Gerd
Ziegler Peter
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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