Rubber-modified fire-retardant anhydride copolymers
US4278768A · kind A · utility
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4References
7Claims
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Key dates
| Filing date | May 7, 1980 |
| Grant date | Jul 14, 1981 |
| Priority date | — |
| Expiry date | May 7, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J9/125
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Rubber-modified copolymers of monovinyl aromatic monomers and the anhydride of ethylenically unsaturated dicarboxylic acid monomers are blended with water as a blowing agent, bromodiphenylethers as fire retardants, and metal oxides as synergist for the ethers to form a composition which can be foamed to densities of between 1 and 10 pounds per cubic foot, said foam composition having fire-retardant properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.