Thermoplastic fluoroelastomers produced by graft copolymerization

US5447994A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Ralf Kruger · Bensberg, DE
• David Harrison · Leverkusen, DE
• Leo Morbitzer

Key dates

• Filing date: Sep 2, 1994
• Grant date: Sep 5, 1995
• Expiry date: Sep 2, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F259/08
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Thermoplastic fluoroelastomer graft polymers formed from a fluorine-containing graft polymer formed from a rubber like (Tg<0.degree. C.), uncrosslinked fluorine-containing copolymer containing double bonds as the graft base onto which is grafted a fluorine-containing monomer that gives an at least partly crystalline polymer are produced from the rubber-like uncrosslinked copolymer by radical polymerization in solution, suspension or emulsion under elevated pressure at about -15.degree. to +120.degree. C., and grafting thereon a monomer which forms an at least partly crystalline polymer the grafting onto the rubber-like copolymer taking place by radical solution, suspension or emulsion graft polymerization under elevated pressure at about -15.degree. to +120.degree. C.