C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 7/12 (2006.01) C08G 18/28 (2006.01) C08G 18/40 (2006.01) C08G 18/63 (2006.01) C09D 175/06 (2006.01)
Patent
CA 2108438
Herberts Gesellschaft mit beschrankter Haftung ABSTRACT A composition, its preparation and use as a rheology- influencing agent for coating media, containing a mixture which is obtainable by the preparation of A) one or more (meth)acrylic copolymers containing hydroxyl groups and/or one or more polyesters containing hydroxyl groups, with a hydroxyl number of 30 - 200 mg KOH/g and a carboxyl group content corresponding to an acid number of 0 - 50 mg KOH/g, and B) a hydroxyfunctional microdispersion obtainable by preparing a solution of one or more film-forming polyesters containing hydroxyl and/or carboxyl groups and/or (meth)acrylic copolymers containing hydroxyl and/or carboxyl groups, wherein up to half of the polyester and/or (meth)acrylic copolymer molecules can each be esterified with one molecule of maleic acid or maleic anhydride, and the polymerisation of one or more radically polymerisable monomers based on one or more hydroxyalkyl (meth)acrylates which may be present in the mixture with one or more other unsaturated monomers in this preparation, and reaction of the mixture of A) and B) with C) one or more diisocyanates and D) one or more aliphatic primary monoamines which may be present in the mixture with part of component A) or of the soluble fraction of component B), 2 wherein the amount of (meth)acrylic copolymers and/or polyesters contained in components A), B) and D) is 57 to 90 weight %, the amount of microparticles contained in B) is 5 to 30 weight %, the amount of diisocyanates C) is 3 to 8 weight %, and the amount of monoamines D) is 2 to 5 weight %, wherein the weight percentages are in each case based on the solids content and add up to 100 weight %, and the composition may in addition contain pigments, extenders, the usual lacquer additives and/or solvents.
Bederke Klaus
Dahm Ralf
Fried Hermann
Kerber Hermann
Reifferscheidt Heinz-Walter
Herberts Gesellschaft Mit Beschrankter Haftung
Kirby Eades Gale Baker
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