Impact-modified polycarbonate compositions
US8338533B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2009 |
| Grant date | Dec 25, 2012 |
| Priority date | — |
| Expiry date | Sep 11, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L33/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to non-aging, impact-modified polycarbonate compositions and molding compositions comprising: A) from 60 to 86 parts by weight (based on the sum of components A+B+C) of aromatic polycarbonate and/or aromatic polyester carbonate, B) from 4 to 12 parts by weight (based on the sum of components A+B+C) of graft polymer comprising: B.1 from 10 to 50 wt. % (based on the graft polymer B) of a shell of at least one vinyl monomer, and B.2 from 90 to 50 wt. % (based on the graft polymer B) of a graft base of silicone-acrylate composite rubber, C) from 10 to 30 parts by weight (based on the sum of components A+B+C) of a polymer or copolymer based on vinyl monomer, and D) from 0 to 20 parts by weight of polymer additives. Components B and C are present in a ratio of the parts by weight of B:C in the range from 1:1.3 to 1:3.5. A composition of the present invention is generally free of inorganic fillers, and is distinguished by an improved balance of multiaxial low-temperature impact strength and flowability, good dyeability and a high heat distortion resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.