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US 4,301,062 AGranted
Diester of 3,5,3',5'-tetrabromo-bisphenol A with halogenated aromatic carboxylic acid
AssigneeAsahi-Dow Limited
InventorsIzumi Yamashita, Kazuo Yoshida, Yuji Kusumi, Kunio Fukuda, Kichiya Tazaki
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Abstract
A novel diester compound of the formula (I): ##STR1## wherein each of R.sub.1 and R.sub.2 represents a group of the formula (II): ##STR2## wherein n is an integer of 0 to 4; and m an integer of 1 to 5, is found to be capable of imparting excellent flame-retardancy to various inflammable polymeric materials such as polystyrene, polyester, polyamide, polyphenylene oxide, etc. without deleterious effects on other physical properties of such polymeric materials.
Claims8
A compound of the formula (I):
- ##STR8## wherein R.sub.1 and R.sub.2, which may be identical or different, represent the groups of the formula (II):
- ##STR9## wherein n is an integer of 1 to 4;
- and m an integer of 1 to 5.
A polymeric material improved in flame-retardancy, comprising:
- (a) at least one inflammable polymer selected from the group consisting of polystyrene, acrylonitrilestyrene resin, acrylonitrile-butadiene-styrene resin, polyphenylene oxide, polyester, polyamide, polyethylene, polypropylene, polyisoprene, polybutadiene, polyacrylate and polycarbonate;
- and
- (b) at least one compound of the formula (I):
- ##STR10## wherein R.sub.1 and R.sub.2, which may be identical or different, represent the groups of the formula (II):
- ##STR11## wherein n is an integer of 1 to 4;
- and m an integer of 1 to 5.
3 more elements
Dependencies are inferred from the claim text.