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US 4,229,332 AGranted
Aromatic copolyester composition
AssigneeUnitika Ltd.
InventorsKayomon Kyo, Yasuhiko Asai, Isamu Hirose, Minolu Kishida
Life of this patent
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Abstract
An aromatic copolyester composition comprising (A) an aromatic copolyester derived from terephthalic acid, isophthalic acid and/or a bisphenol and (B) a metal salt of an organic carboxylic acid, which is suitable for preparation of molded articles having superior mechanical properties and fire retardancy as well as superior thermal stability and reduced crazing.
Claims22
An aromatic copolyester composition comprising:
- (A) an aromatic copolyester prepared by reacting
- (a) a mixture of terephthalic acid and/or a functional derivative thereof and isophthalic acid and/or a functional derivative thereof, with the terephthalic acid unit/isophthalic acid unit molar ratio being about 9:1 to about 1:9, and
- (b) a bisphenol of the general formula (I) ##STR4## wherein --X-- is a member selected from the group consisting of --O--, --S--, --SO.sub.2 --, --SO--, --CO--, an alkylene group containing 1 to 4 carbon atoms and an alkylidene group containing 1 to 4 carbon atoms, and R.sub.1, R.sub.2, R.sub.3, R.sub.4, R'.sub.1, R'.sub.2, R'.sub.3 and R'.sub.4, which may be the same or different, each is a member selected from the group consisting of a hydrogen atom, a chlorine atom, a bromine atom and an alkyl group containing 1 to 4 carbon atoms, or a functional derivative thereof, and
- (B) a salt of an organic carboxylic acid containing 1 to 22 carbon atoms and a metal of Groups I, II, III or IV of the Periodic Table.
1 more element
Dependencies are inferred from the claim text.