Block copolymers

US6239226A · kind A · utility

Assignee

• BASF SE

Inventors

• Michael Fischer · Ludwigshafen, DE
• Jurgen Koch · Refrath, DE

Key dates

• Filing date: Jul 15, 1998
• Grant date: May 29, 2001
• Expiry date: Jul 15, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F293/005
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A block copolymer obtainable by reacting PA1 A) monomers selected from the group consisting of styrene, .alpha.-methylstyrene, acrylonitrile, methacrylonitrile, methyl methacrylate and maleic anhydride to form blocks A having a glass transition temperature Tg of more than 0.degree. C. and PA1 B) monomers selected from the group consisting of n-butyl acrylate, methyl acrylate and 2-ethylhexyl acrylate to form blocks B having a glass transition temperature Tg of less than 0.degree. C. at from 100 to 160.degree. C. in the presence of free-radical initiators and N-oxyl radicals.