Carboxyl-containing acrylate copolymer and epoxy resin
AssigneeBASF Lacke + Farben, AG
InventorsStephan Engelke, Michael Brunnemann, Olaf Rotter, Andreas Holst
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Abstract
A coating agent comprises a binding agentcontaining 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; and one or more epoxy resins.
Claims20
A coating agent which comprises, as the binding agent, at least one polymer containing carboxyl groups and, as the hardener, at least one epoxy resin having on average more than one epoxide group per molecule, wherein:
- the binding agent comprises at least one acrylate copolymer (A) which comprises carboxyl groups and is prepared by solution polymerization using from 0.4 to 2.5% by weight, based on the total weight of the 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, wherein copolymer A has a number average molecular weight of between 5000 and 25,000.
Dependencies are inferred from the claim text.