Adhesives

US7465767B2 · kind B2 · utility

Assignee

• Cytec Surface Specialties, S.A. · US

Inventors

• François Simal · Ottignies-Louvain-la-Neuve, BE
• Harrell Tweedy · Acworth, US
• Steven Van Es · Meerhout, BE
• Patrice Roose · Sint-Pieters-Leeuw, BE

Key dates

• Filing date: Dec 19, 2003
• Grant date: Dec 16, 2008
• Expiry date: Aug 12, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2666/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

There are disclosed star shaped thermoplastic elastomers made of acrylic block copolymers obtained by transition metal catalysed radical polymerisation. The elastomers comprise core arms obtained from monomers or mixture of monomers, whose Tg is from about −65° C. to about −20° C., and of shell arms obtained from monomers or mixture of monomers, whose Tg is from about 70° C. to about 160° C. The core copolymer has a polydispersity of 2 or higher and the final copolymer has a polydispersity of from 3 to 10.