Flame retardant compounds and thermoplastic compositions containing the same
US4743637A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1986 |
| Grant date | May 10, 1988 |
| Priority date | — |
| Expiry date | Aug 1, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2201/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Novel flame retardant agents comprise polyalkylene oxides or a derivative thereof end-capped with brominated phthalimide groups, and have the general formulae EQU R--R.sup.1 --O--R.sup.1).sub.n R (I) EQU (R--R.sup.1 --O--R.sup.1).sub.n' NH).sub.2 C.dbd.O (II) or EQU R--R.sup.1 --OR.sup.1).sub.n" CH.sub.2).sub.3 C--R.sup.2 (III) wherein R is ##STR1## R.sup.1 is alkylene of from about 2 to about 6 carbon atoms; R.sup.1 is alkyl of from about 1 to about 6 carbon atoms; n is from about 4 to about 40; n' is from about 3 to about 15; and n" is from about 1 to about 10. Thermoplastic compositions, for example, polyphenylene ether compositions, rendered flame retardant with the novel compounds have a high resistance to additive vaporization and surface liquid exudation as well as desirable high flow characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.