Glass fibre reinforced polycarbonate composition met improved toughness
US7208542B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2003 |
| Grant date | Apr 24, 2007 |
| Priority date | — |
| Expiry date | Apr 25, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L69/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a polycarbonate composition containing: a) 40–69.5 mass % of aromatic polycarbonate having a limiting viscosity number of 43–52 ml/g, b) 30–50 mass % of sized glass fibres, c) 0.5–5 mass % of at least one partially hydrogenated block copolymer containing at least two terminal polymer blocks A of a monoalkenylarene and at least one intermediate polymer block B of a conjugated diene, and optionally d) 0–25 mass % of other additives, and where the sum of a–d) is 100%. The composition combines improved toughness, for example increased elongation at break and improved environmental stress cracking resistance, and high strength and rigidity. The invention also relates to a process for producing the polycarbonate composition according to the invention, to a moulded part that contains this composition and to an article that contains such a moulded part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.