Aqueous n-butyl acrylate copolymer dispersions for use as laminating adhesives

US6727327B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Matthias Gerst · Maikammer, DE
• Alexander Centner · Ludwigshafen am Rhein, DE
• Karl-Heinz Schumacher · Ludwigshafen, DE

Key dates

• Filing date: Aug 27, 2001
• Grant date: Apr 27, 2004
• Expiry date: Aug 27, 2021

Classification

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

Abstract

The present invention provides aqueous polymer dispersions comprising at least one particulate polymer P having a glass transition temperature Tg of less than 0° C. which is composed of ethylenically unsaturated monomers M including:i. from 60 to 94.9% by weight, preferably from 75 to 89.5% by weight, of n-butyl acrylate as monomer M1,ii. from 5 to 39.9% by weight, preferably from 10 to 24.5% by weight, of at least one monomer M2 selected from esters of methacrylic acid with C1 to C4 alkanols, tert-butyl acrylate, and vinylaromatic monomers, andiii. from 0.1 to 5% by weight, preferably from 0.5 to 2% by weight, of at least one monomer M3 selected from ethylenically unsaturated compounds having at least one acid group;the proportions of said monomers M1 to M3 being based on 100% by weight of monomers M,obtainable by free-radical aqueous emulsion polymerization of monomers M in the presence of at least 0.01% by weight, based on the weight of the monomers M, of at least one molecular weight regulator. The present invention also provides for the use of such polymer dispersions in adhesive formulations for producing laminates, a process for producing laminates, and the laminates obt…