Copolymer dispersions

US4321175A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Adolf Schmidt · Adelsheim, DE
• Werner Clarenz · Leverkusen, DE

Key dates

• Filing date: Dec 5, 1979
• Grant date: Mar 23, 1982
• Expiry date: Dec 5, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31989
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

40-50% by weight finely divided, stable, aqueous dispersions (particle size 0.1-0.15.mu.) of copolymers of copolymerized units of PA1 20-48% by weight of acrylonitrile which may be partially substituted by styrene, PA1 47,5-70,5% by weight of n-butyl acrylate, PA1 3,5-4,5% by weight of methacrylic acid, which may be substituted up to 50% by acrylic acid and PA1 0-5% by weight of N-methoxymethyl metharylamide. The dispersions are prepared by a special process characterized by a critical combination of known process steps. The dispersions are eminently suitable for use as binders in unpigmented or pigmented aqueous dispersion paints for metal, wood, plastics and mineral substrates.