Transparent and flexible blends of PMMA and polycarbonate-siloxane copolymer

US11760878B2 · kind B2 · utility

Assignee

• SHPP Global Technologies B.V. · NL

Inventors

• Christopher Luke Hein · Evansville, US
• Hao Zhou · Evanston, US
• Bing Zhou · Cranbury, US
• Manojkumar Chellamuthu · Greenwood, US
• Peter Vollenberg · Evansville, US

Key dates

• Filing date: Oct 22, 2019
• Grant date: Sep 19, 2023
• Expiry date: Aug 13, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2203/30
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A thermoplastic composition includes from about 30 wt % to about 95 wt % poly(methyl methacrylate) (PMMA), and from about 5 wt % to about 70 wt % of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt % to about 45 wt %. A method of making a thermoplastic composition includes: (a) combining from about 30 wt % to about 95 wt % poly(methyl methacrylate) (PMMA) and from about 5 wt % to about 70 wt % of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt % to about 45 wt % to form a mixture; and melt processing the mixture to polymerize it and form the thermoplastic composition.