Production of highly concentrated adhesive dispersions and their use

US6225401A · kind A · utility

Assignee

• BASF SE

Inventors

• Gerd Rehmer · Beindersheim, DE
• Bernd Stanger · Dudenhofen, DE
• Gerhard Auchter · Bad Dürkheim, DE
• Johannes Turk · Böhl-Iggelheim, DE
• Oral Aydin · Mannheim, DE
• Rudiger Fussl · Neustadt, DE

Key dates

• Filing date: Feb 22, 1999
• Grant date: May 1, 2001
• Expiry date: Feb 22, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F220/1808
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Readily filterable and deodorizable aqueous dispersions of pressure-sensitive adhesive, especially for self-adhesive labels, having solids contents of more than 65%, can be prepared with readily reproducible properties by copolymerizing esters of acrylic and/or methacrylic acid in the presence of less than 50 ppm of inhibitor and, preferably, in the presence of from 0.01 to 5% by weight of reducing agent by a special emulsion technique. The highly concentrated pressure-sensitive adhesive dispersion, subsequently deodorized with steam, is free from coagulum and seediness.