Polycarbonate compositions for mobile phone housing applications
US11104796B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2019 |
| Grant date | Aug 31, 2021 |
| Priority date | — |
| Expiry date | Jan 29, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2207/324
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polycarbonate composition contains, based on the total weight of the polycarbonate composition: one or more polycarbonate homopolymers; a poly(carbonate-siloxane) copolymer comprising siloxane units with an average block length of 5 to 120, preferably 10 to 100, the poly(carbonate-siloxane) copolymer being present in an amount effective to provide 2.5 to 10 wt % of siloxane units based on the total weight of the polycarbonate composition; 1 to 8 wt % of an elastomer-modified graft copolymer; 0.01 to 5 wt % of a silicone oil; and 0.1 to 8 wt % of an additive; and wherein the composition has a melt mass flow rate higher than 16 g/10 min, determined in accordance with ASTM D1238 under a load of 1.2 kg at 300° C. with a dwelling time of 300 seconds; and an Izod notched impact energy of at least 700 J/m measured at 23° C. on a sample of 3.2 mm thickness according to ASTM D256-10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.