Modified polyphenylene ether resins having improved foamability and methods of making the same
US4728674A · kind A · utility
9Cited by
14References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 16, 1987 |
| Grant date | Mar 1, 1988 |
| Priority date | — |
| Expiry date | Jun 16, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2371/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The production of foamed articles of polyphenylene ether resins is improved by including a modifier comprising an alpha, beta-unsaturated carboxylic acid or derivative. The resulting products are lightweight, exhibit superior heat resistance and retain flame retardancy over polyphenylene ether resins which are foamed in the absence of the modifier. Such resins are especially suited for the production of extrusion and injection foam molding material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.