Hot-melt pressure-sensitive adhesives based on block copolymers

US4089824A · kind A · utility

Assignee

• BASF SE

Inventors

• Klaus Bronstert · Eisenberg (Pfalz), DE
• Volker Ladenberger · Schwetzingen, DE
• Wolfgang Druschke
• Wolfgang Groh · Mannheim, DE
• Helmut Mueller

Key dates

• Filing date: Oct 18, 1976
• Grant date: May 16, 1978
• Expiry date: Oct 18, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2666/02
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Hot-melt pressure-sensitive adhesive composition based on a rubbery block copolymer of a monovinyl-aromatic compound or monovinylidene-aromatic compound and butadiene. The composition contains a selectively hydrogenated radial block copolymer with terminal polymer blocks of the monovinyl- or mono-vinylidene-aromatic compound and, in the middle position, butadiene-based polymer blocks which had a 1,2-vinyl content of from 30 to 70 per cent by weight prior to hydrogenation. The compositions may be used, in particular, for the production of self-adhesive materials.