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US3887523A
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Fiber-forming copolyester compositions from brominated ethoxylated hydroquinone
Assignee: Henkel Corp
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Filing: 1974-06-24
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Granted: 1975-06-03
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Expires: 1994-06-24
Abstract
Abstract Flame retardant copolyesters capable of being formed into fibers and filaments and which are thermally stable at temperatures up to about 350*C are obtained by the use of ethoxylated brominated hydroquinones.
Inventors
- 👤 Chiou C Yau
- 👤 Irwin S Schlossman
- 👤 Herman F Oehlschlaeger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:38
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/682; C08G63/6824; C08G63/6826; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
34 words
A FLAME RETARDANT, THERMALLY STABLE, FIBER-FORMING COPOLYESTER COMPRISING THE CONDENSATION PRODUCT OF (A) A DIOL, (B) A DICARBOXYLIC ACID OR A LOWER ALKYL ESTER THEREOF AND (C) A BORMINATED ETHOXYLATED HYDROQUINONE OF THE FORMULA
Claim 2
Dependent Claim
34 words
A FLAME RETARDANT, THERMALLY STABLE, FIBER-FORMING COPOLYESTER COMPRISING THE CONDENSATION PRODUCT OF (A) A DIOL, (B) A DICARBOXYLIC ACID OR A LOWER ALKYL ESTER THEREOF AND (C) A BORMINATED ETHOXYLATED HYDROQUINONE OF THE FORMULA
Claim 3
Dependent Claim
34 words
A flame retardant, thermally stable, fiber-forming copolyester comprising the condensation product of (a) a diol, (b) a dicarboxylic acid or a lower alkyl ester thereof and (c) a brominated ethoxylated hydroquinone of the formula
Claim 4
Dependent Claim
34 words
A flame retardant, thermally stable, fiber-forming copolyester comprising the condensation product of (a) a diol, (b) a dicarboxylic acid or a lower alkyl ester thereof and (c) a brominated ethoxylated hydroquinone of the formula
Claim 5
Dependent Claim
21 words
The copolyester of claim 1 wherein n and m of the brominated ethoxylated hydroquinone are the same and equal to 1.
Claim 6
Dependent Claim
44 words
The copolyester of claim 1 wherein (a) is selected from the group consisting of glycols of the formula HO-CH2)xOH where x is an iNteger from 2 to 10 and 1,4-cyclohexanedimethanol and (b) is selected from the group consisting of terephthalic acid and dimethyl terephthalate.
Claim 7
Dependent Claim
10 words
The copolyester of claim 3 wherein (c) has the formula
Claim 8
Dependent Claim
10 words
The copolyester of claim 3 wherein (c) has the formula
Claim 9
Dependent Claim
10 words
The copolyester of claim 3 wherein (c) has the formula
Claim 10
Dependent Claim
22 words
The copolyester of claim 3 wherein (a) is ethylene glycol and (c) constitutes 5 to 15% by weight of the copolyester composition.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |