Aqueous polymer latex of film-forming copolymers suitable as binders in aqueous coating compositions

Aqueous polymer latexes using methylene-γ-butyrolactone and (meth)acrylate esters in emulsion polymerization address the challenge of achieving balanced coating properties and reducing fossil carbon, offering improved adhesion, gloss, and stain resistance in water-based architectural coatings.

JP2026516405APending Publication Date: 2026-05-25BASF SE
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
BASF SE
Filing Date
2024-03-21
Publication Date
2026-05-25

AI Technical Summary

Technical Problem

Existing polymer dispersions struggle to achieve a balanced coating profile with improved hardness, adhesion, gloss, and stain resistance while reducing fossil carbon content, and existing bio-based monomers often result in unstable latexes or low glass transition temperatures.

Method used

Aqueous polymer latexes are produced through emulsion polymerization using a combination of methylene-γ-butyrolactone and (meth)acrylate esters, including bio-based monomers, to enhance coating properties such as adhesion, gloss, and stain resistance without compromising stability.

Benefits of technology

The polymer latexes provide a stable, balanced coating profile with improved adhesion, gloss, and stain resistance, significantly reducing fossil carbon usage by incorporating bio-based monomers, suitable for water-based architectural coatings.

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Abstract

The present invention relates to aqueous polymer latexes of film-forming copolymers obtained by aqueous emulsion polymerization of an ethylenically unsaturated monomer M comprising a combination of methylene-γ-butyrolactone and a (meth)acrylate ester. The present invention also relates to a process for producing such polymer latexes and the use of these polymer latexes as binders in aqueous coating compositions. Furthermore, the present invention relates to aqueous coating compositions comprising a binder polymer in the form of the aqueous polymer latex and at least one further component that has been conventionally used in aqueous coating compositions but is not a binder.
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