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US4229332A
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Aromatic copolyester composition
Assignee: Unitika Ltd
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Filing: 1977-12-13
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Granted: 1980-10-21
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Expires: 1997-12-13
Abstract
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.
Inventors
- 👤 Kayomon Kyo
- 👤 Yasuhiko Asai
- 👤 Isamu Hirose
- 👤 Minolu Kishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:01
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
188 words
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 2 --, --SO--, --CO--, an alkylene group containing 1 to 4 carbon atoms and an alkylidene group containing 1 to 4 carbon atoms, and R 1 , R 2 , R 3 , R 4 , R' 1 , R' 2 , R' 3 and R' 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.
Claim 2
Dependent Claim
188 words
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 2 --, --SO--, --CO--, an alkylene group containing 1 to 4 carbon atoms and an alkylidene group containing 1 to 4 carbon atoms, and R 1 , R 2 , R 3 , R 4 , R' 1 , R' 2 , R' 3 and R' 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.
Claim 3
Dependent Claim
10 words
The composition of claim 1, wherein the biphenol is 2,2-bis(4-hydroxyphenyl)propane.
Claim 4
Dependent Claim
23 words
The composition of claim 1, wherein the molar ratio of the terephthalic acid units to the isophthalic acid unit i 7:3 to 3:7.
Claim 5
Dependent Claim
21 words
The composition of claim 1, wherein the molar ratio of the terephthalic acid units to the isophthalic acid unit is 1:1.
Claim 6
Dependent Claim
33 words
The composition of claim 1, wherein the amount of the organic carboxylic acid metal salt (B) is about 0.01 to about 3.0% by weight based on the weight of the aromatic copolyester (A).
Claim 7
Dependent Claim
31 words
The composition of claim 1, wherein the amount of the organic carboxylic acid metal salt (B) is 0.1 to 1.0% by weight based on the weight of the aromatic copolyester (A).
Claim 8
Dependent Claim
14 words
The composition of claim 1, wherein the organic carboxylic acid is a monocarboxylic acid.
Claim 9
Dependent Claim
27 words
The compoition of claim 7, wherein the monocarboxylic acid is selected from the group conisting of formic acid, acetic acid, stearic acid, benzoic acid an lauric acid.
Claim 10
Dependent Claim
14 words
The composition of claim 1, wherein the organic carboxylic acid is a dicarboxylic acid.
Claim 11
Dependent Claim
21 words
The composition of claim 9, wherein the dicarboxylic acid is selected from the group consisting of terephthalic acid and isophthalic acid.
Claim 12
Dependent Claim
12 words
The composition of claim 1, wherein the metal is an alkali metal.
Claim 13
Dependent Claim
20 words
The composition of claim 11, wherein the alkali metal is selected from the group consisting of lithium, sodium and potassium.
Claim 14
Dependent Claim
23 words
The composition of claim 1, wherein the metal is selected from the group consisting of magnesium, calcium, barium, zinc, cadmium, tin and lead.
Claim 15
Dependent Claim
38 words
The composition of claim 1, wherein the molar ratio of the terephthalic acid unit to the isophthalic acid units is 7:3 to 3:7, the bisphenol is 2,2-bis(4-hydroxyphenyl)propane, and the salt of the organic carboxylic acid is sodium acetate.
Claim 16
Dependent Claim
38 words
The composition of claim 1, wherein the molar ratio of the terephthalic acid units to the isophthalic acid units is 7:3 to 3:7, the bisphenol is 2,2-bis(4-hydroxyphenyl)propane, and the salt of the organic carboxylic acid is sodium stearate.
Claim 17
Dependent Claim
38 words
The composition of claim 1, wherein the molar ratio of the terephthalic acid units to the isophthalic acid units is 7:3 to 3:7, the bisphenol is 2,2-bis(4-hydroxyphenyl)propane, and the salt of the organic carboxylic acid is sodium formate.
Claim 18
Dependent Claim
38 words
The composition of claim 1, wherein the molar ratio of the terephthalic acid units to the isophthalic acid units is 7:3 to 3:7, the bisphenol is 2,2-bis(4-hydroxyphenyl)propane, and the salt of the organic carboxylic acid is sodium benzoate.
Claim 19
Dependent Claim
10 words
A molded article produced from the composition of claim 1.
Claim 20
Dependent Claim
10 words
A molded article produced for the composition of claim 14.
Claim 21
Dependent Claim
10 words
A molded article produced from the composition of claim 15.
Claim 22
Dependent Claim
10 words
A molded article produced from the composition of claim 16.
Claim 23
Dependent Claim
10 words
A moled article produced from the composition of claim 17.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |