US4064196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-retardant resin compositions
Assignee: Unitika Ltd
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Filing: 1976-02-19
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Granted: 1977-12-20
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Expires: 1996-02-19
Abstract
Abstract A resin composition comprising: (a) an aromatic co-polyester comprising terephthalic acid, isophthalic acid and a halogen-free bisphenol; and (b) a halogen-containing aromatic co-polyester containing terephthalic acid, isophthalic acid and, at least in part, a bisphenol bearing a halogen substituent(s) as a comonomer. Molded articles prepared from such a resin composition possess excellent mechanical properties, electrical properties and flame-retardant capabilities.
Inventors
- 👤 Kenichi Hazama
- 👤 Isamu Hirose
- 👤 Kenji Yasue
- 👤 Daisuke Shinoura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:38
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08L67/03; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
73 words
A flame-retardant aromatic co-polyester composition comprising (A) a halogen-free aromatic co-polyester obtained by the condensation reaction of (a) 2,2-bis(4'-hydroxyphenyl)propane and (b) a mixture of isophthalic acid and/or its functional derivatives and terephthalic acid and/or its functional derivatives, and (B) a halogen-containing aromatic co-polyester obtained by the condensation reaction of (a) 2,2-bis(4'hydroxy-3', 5'-dibromophenyl)propane and/or 2,2-bis(4'-hydroxy-3', 5'-dichlorophenyl)propane and (b) a mixture of isophthalic acid and/or its functional derivatives and terephthalic acid and/or its functional derivatives.
Claim 2
Dependent Claim
73 words
A flame-retardant aromatic co-polyester composition comprising (A) a halogen-free aromatic co-polyester obtained by the condensation reaction of (a) 2,2-bis(4'-hydroxyphenyl)propane and (b) a mixture of isophthalic acid and/or its functional derivatives and terephthalic acid and/or its functional derivatives, and (B) a halogen-containing aromatic co-polyester obtained by the condensation reaction of (a) 2,2-bis(4'hydroxy-3', 5'-dibromophenyl)propane and/or 2,2-bis(4'-hydroxy-3', 5'-dichlorophenyl)propane and (b) a mixture of isophthalic acid and/or its functional derivatives and terephthalic acid and/or its functional derivatives.
Claim 3
Dependent Claim
26 words
The flame-retardant aromatic co-polyester composition as described in claim 1, wherein the molar ratio of terephthalic acid to isophthalic acid is about 1:9 to about 9:1.
Claim 4
Dependent Claim
28 words
The flame-retardant aromatic co-polyester composition as described in claim 1, wherein the molar ratio of terephthalic acid to isophthalic acid is 3 : 7 to 7 : 3.
Claim 5
Dependent Claim
24 words
The flame-retardant aromatic co-polyester composition as described in claim 1, wherein the molar ratio of terephthalic acid to isophthalic acid is 1 : 1.
Claim 6
Dependent Claim
29 words
The flame-retardant aromatic co-polyester composition as described in claim 1, wherein the halogen content based on the total amount of the composition is at least about 1% by weight.
Claim 7
Dependent Claim
15 words
The flame-retardent aromatic co-polyester composition as described in claim 5, wherein the halogen is bromine.
Claim 8
Dependent Claim
29 words
The flame-retardant aromatic co-polyester composition as described in claim 1, wherein the halogen content based on the total amount of the composition is at least about 1.5% by weight.
Claim 9
Dependent Claim
15 words
The flame-retardant aromatic co-polyester composition as described in claim 7, wherein the halogen is chlorine.
Claim 10
Dependent Claim
29 words
The flame-retardant aromatic co-polyester composition as described in claim 1, wherein the halogen content based on the total amount of the composition is at least about 2.0% by weight.
Claim 11
Dependent Claim
28 words
The flame-retardant aromatic co-polyester composition as described in claim 1, wherein the halogen content based on the total amount of the composition is at least 3.0% by weight.
Claim 12
Dependent Claim
10 words
A molded article produced from the composition of claim 1.
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) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |