Anti-drip compositions including transparent blends of PMMA and PC-siloxane copolymer

US11193014B2 · 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: Dec 7, 2021
• Expiry date: Oct 22, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2203/16
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Thermoplastic compositions include: (a) from about 30 wt % to about 95 wt % poly(methyl methacrylate) (PMMA); and (b) 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 %. Methods for making a molded article, include: (a) combining from about 30 wt % to about 95 wt % 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 blend; (b) melt processing and pelletizing the blend; and (c) injection molding the article from the melt processed and pelletized blend.