C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/48 (2006.01) B01F 17/00 (2006.01) C08G 18/10 (2006.01) C08G 18/28 (2006.01) C08G 18/32 (2006.01) C08G 18/66 (2006.01) C09D 5/02 (2006.01) C09D 7/02 (2006.01)
Patent
CA 2213911
The present invention relates to a process for the solvent-free production of polyisocyanate addition products, which are suitable as dispersing agents for incorporating solids into aqueous coating compositions, wherein the polyisocyanate addition products have a maximum content of 1% by weight of isocyanate groups and a content of 30 to 95% by weight of ethylene oxide units (molecular weight = 44) present in the polyether chains of monofunctional alcohols B), and are prepared by reacting A) a polyisocyanate component having an average NCO functionality of 1.7 to 2.5 and an NCO content of 10 to 65% by weight with one or more of the following components: B) monohydric polyether alcohols having a number average molecular weight of 150 to 5000 and an ethylene oxide content of 40 to 99.5% by weight, C) monohydric alcohols having a number average molecular weight of 32 to 5000, which are different from the alcohols of component B), D) an amine component which contains at least one tertiary amine having a molecular weight of 88 to 250 and which contains one isocyanate-reactive group and E) compounds having a number average molecular weight of 32 to 5000 and at least two isocyanate-reactive groups, The present invention also relates to the polyisocyanate addition products obtained by this process and to their use as dispersing agents incorporating solids into aqueous and/or solvent-containing coating compositions.
Kirchmeyer Stephan
Mazanek Jan
Wamprecht Christian
Wilmes Oswald
Aktiengesellschaft Bayer
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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