Low-VOC aqueous hybrid binders
AssigneeBASF SE
InventorsRoelof Balk, Sebastian Roller, Rolf Dersch, Uwe Dittrich
Life of this patent
Estimating the term…
Abstract
The present invention relates to aqueous binder compositions obtainable by emulsion polymerization of (A) at least one C1-C10 alkyl (meth)acrylate, and/or a vinylaromatic compound having up to 20 C atoms, or mixtures thereof (monomers A), (B) and also, if appropriate, further monomers B, and (C) at least one water-soluble alkyd resin having a weight-average molecular weight between 5000 and 40 000 Da, wherein the polymerization of the monomers A and also, if appropriate, B and the alkyds C is carried out in the form of a parallel feed process, and also to their preparation and use in coating materials.
Claims16
An aqueous binder composition obtained by emulsion polymerization of
- (A) at least one C1-C10 alkyl (meth)acrylate, or at least one vinylaromatic compound having up to 20 C atoms, or a mixture thereof (monomers A),
- (B) optionally at least one monomer B (monomers B), in the presence of
- (C) a solution of at least one water-soluble alkyd resin having a weight-average molecular weight between 5000 and 40 000 Da (alkyds C),
- wherein monomers A and optionally the monomers B are fed into a polymerization vessel parallel to a feed of said alkyds C and polymerization takes place by way of two or more spatially separate feed streams;
- and
- wherein an initiator for said emulsion polymerization is a water-soluble initiator.
Dependencies are inferred from the claim text.