Poly(phenylene ether) resin modified with silicone rubber powder
US5916952A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1997 |
| Grant date | Jun 29, 1999 |
| Priority date | — |
| Expiry date | Nov 20, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L71/123
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A free-flowing silicone rubber powder, having an average particle size of 1 to 1000 microns and prepared by mixing a polydiorganosiloxane with a silica filler, is uniformly dispersed in a poly(phenylene ether) resin using conventional equipment, such as a single screw or, preferably, a twin screw extruder. When employed at relatively low concentrations, such as about 0.2 to 3 parts by weight of powder per 100 parts by weight of resin, a significant improvement in the processability is obtained, while modification at higher levels, such as 5 to 20 parts by weight of powder per 100 parts by weight of the resin results in a resin composition having greatly augmented impact resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.