Low density particles of polyphenylene ether resins
US4727093A · kind A · utility
20Cited by
16References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1986 |
| Grant date | Feb 23, 1988 |
| Priority date | — |
| Expiry date | Oct 27, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2471/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Low density particles or beads of polyphenylene ether or polyphenylene ether-polystyrene blends are provided by incorporation of a suitable blowing agent such as pentane into the resin mixture, flowed by expansion of the resin particles by exposure temperatures near the Tg of the blend.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.