Dispersions of non-tertiary butyl (meth)acrylate copolymers having glass transition temperatures of less than -10.degree.C.

US4937282A · kind A · utility

Assignee

• BASF SE

Inventors

• Peter Pfoehler · Speyer, DE
• Hermann Seyffer · Heidelberg, DE
• Juergen Vietmeter · Monsheim, DE
• Johannes Tuerk · Haßloch, DE
• Wolfgang Druschke
• Klaus Schagerer · Havelsee, DE

Key dates

• Filing date: Jun 1, 1989
• Grant date: Jun 26, 1990
• Expiry date: Jun 1, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F220/1804
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Aqueous dispersions of copolymers of PA1 (a) from 70 to 85% by weight of nontertiary butyl (meth)acrylates, PA1 (b) from 8 to 27.2% by weight of (meth)acrylates (A) whose homopolymers have a glass transition temperature greater than that of the polybutyl (meth)acrylate up to 0.degree. C. and (meth)acrylates (B) whose homopolymers have a glass transition temperature below that of the polybutyl (meth)acrylate, the weight ratio of the (meth)acrylates (A) to the (meth)acrylates (B) being from 3:1 to 1:3, PA1 (c) from 2 to 15% by weight of methyl methacrylate, styrene and/or acrylonitrile and PA1 (d) 0.8 to 5% by weight of monoolefinically unsaturated mono- and/or dicarboxylic acids of 3 to 5 carbon atoms and/or their amides which are unsubstituted or substituted at the nitrogen atoms by alkyl and/or alkylol radicals of 1 to 4 carbon atoms and/or hydroxyalkyl (meth)acrylates where the alkyl groups are of 2 to 5 carbon atoms, are used for coating sheet-like substrates.