Flame retardant composition of polyphenylene ether, styrene resin and cyclic phosphate
AssigneeGeneral Electric Company
InventorRobert J. Axelrod
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Abstract
Flame retardant compositions comprising a polyphenylene ether resin, a styrene resin and a cyclic phosphate have excellent appearance and physical properties after molding. Especially useful is diphenyl pentaerythritol diphosphate.
Claims20
A flame retardant composition comprising
- (a) a normally flammable composition comprising a polyphenylene ether resin and a styrene resin, and
- (b) an effective, flame-retardant amount of a compound of the formula ##STR6## wherein R is alkyl of from 1 to 18 carbon atoms, aryl or alkaryl.
A process for decreasing the self-extinguishing time of a normally flammable composition comprising a polyphenylene ether resin and a styrene resin, said process comprising adding to said composition an effective flame-retardant amount of a flame-retardant of the formula ##STR9## wherein R is alkyl of from 1 to 18 carbon atoms, aryl or alkaryl.
A process for decreasing the self-extinguishing time of a normally flammable composition comprising a polyphenylene ether resin and a styrene resin, said process comprising adding to said composition from 2 to 4.5 parts by weight per 100 parts by weight of polyphenylene ether resin, styrene resin, and flame-retardant combined, of a flame-retardant of the formula ##STR12## wherein R is alkyl of from 1 to 18 carbon atoms, aryl or alkaryl.
A flame retardant composition comprising
- (a) a normally flammable composition comprising a polyphenylene ether resin and a styrene resin, and
- (b) from 2 to 4.5 parts by weight per 100 parts of (a) and (b) combined of a compound of the formula ##STR13## wherein R is alkyl of from 1 to 18 carbon atoms, aryl or alkaryl.
Dependencies are inferred from the claim text.