Polysiloxane-polycarbonate compositions, method of manufacture, and articles formed therefrom

US8389648B2 · kind B2 · utility

Assignee

• Sabic Innovative Plastics B.V. · NL

Inventors

• Purushotham Adoni · Savanuru, IN
• Dibakar Dhara · Bengaluru, IN
• Sriramakrishna Maruvada · Evansville, US
• Roopali Rai · Savanuru, IN
• Veeraraghavan Srinivasan · Bengaluru, IN

Key dates

• Filing date: Aug 2, 2011
• Grant date: Mar 5, 2013
• Expiry date: Aug 2, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L83/10
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A composition, comprising, based on the total weight of the polymer components in the composition, 1 to 40 wt. % of an aromatic polycarbonate, 30 to 98.8 wt. % of a polysiloxane-polycarbonate block copolymer, and 0.1 to 10 wt. % of a polysiloxane-polyimide block copolymer comprising more than 20 wt. % polysiloxane blocks, based on the total weight of the polysiloxane-polyimide copolymer. The compositions provide articles with low haze, high luminous transmittance, and good hydro-aging properties. The articles can further be formulated to have excellent flame retardance, particularly when KSS is used.