Carboxyl-containing acrylate copolymer, carboxyl-containing resin and epoxy resin
AssigneeBASF Lacke + Farben, AG
InventorsStephan Engelke, Michael Brunnemann, Olaf Rotter, Andreas Holst
Life of this patent
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Abstract
A coating agent comprises a binding agent containing at least one acrylate copolymer (A) with carboxyl groups and/or at least one acrylate copolymer (B) with epoxide groups, the acrylate copolymers (A) and (B) being obtained by solution polymerization using less than 5% by weight based on the total weight of monomers of one or more polysiloxane macromonomers a.sub.1 having a number-average molecular weight of 1000 to 40,000 and on average 0.5 to 2.5 ethylenically unsaturated double bonds per molecule; one or more addition and/or condensation resins with carboxyl groups; and one or more epoxy resins.
Claims18
A coating agent which comprises:
- a binding agent comprising at least one acrylate copolymer (A) which contains carboxyl groups and is obtained by solution polymerization using from 0.4 to 2.5% by weight, based on the total weight of the monomers employed for the preparation of copolymer (A), of one or more polysiloxane macromonomers a.sub.1 having a number-average molecular weight of 1000 to 40,000 and on average 0.5 to 2.5 ethylenically unsaturated double bonds per molecule, and
- one or more further addition and/or condensation resins containing carboxyl groups;
- and
- one or more epoxy resins as a crosslinking component.
A coating agent which comprises:
- A) at least one acrylate copolymer (A) which contains carboxyl groups and is obtained by solution polymerization using from 0.4% to less than 1.0% by weight, based on the total weight of the monomers employed for the preparation of copolymer (A), of one or more polysiloxane macromonomers a.sub.1 having a number-average molecular weight of 1000 to 40,000 and on average 0.5 to 2.5 ethylenically unsaturated double bonds per molecule, and
- (B) one or more further addition and/or condensation resins containing carboxyl groups and
- C) one or more epoxy resins.
Dependencies are inferred from the claim text.