US4045513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene 2,6-naphthalene dicarboxylated-alkylene-2,5 dibromoterephthalate flame-retardant copolyesters
Assignee: Akzo Nobel UK PLC
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Filing: 1973-01-30
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Granted: 1977-08-30
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Expires: 1993-01-30
Abstract
Abstract A flame-retardant filament-forming copolyester resin of at least 75 mol % of ethylene-2,6-naphthalene dicarboxylate units and at least 5 mol % up to 25 mol % of alkylene-2,5-dibromoterephthalate units is disclosed herein. In addition, fibers of the above flame-retardant copolyester resin and flame-retardant cellulosic fibers are blended together to provide flame-retardant yarns and fabrics of excellent physical properties.
Inventors
- 👤 William N. Knopka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:07
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/667; D06M15/673; C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C08G63/185; C08G63/187; C08G63/189; C08G63/68; C08G63/682; C08G63/6824; C08G63/6826; C08G63/688; C08G63/6884; C08G63/6886; C08G79/00; C08G79/02; C08G79/025; C08K; C08K5/00; C08K5/02; C08K5/03; C08L; C08L67/00; C08L67/02; C08L85/00; C08L85/02; D02; D02G; D02G3/00; D02G3/44; D02G3/443; D06M13/00; D06M13/08; D06M13/10; D06M13/184; D06M13/207; D06M13/21; D06M13/224; D06M13/232; D06M15/507; D06M15/53
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
40 words
A filament-forming random copolyester resin of at least 75 mol % of ethylene-2,6-naphthalene dicarboxylate units and at least 5 mol % up to 25 mol % of alkylene-2,5-dibromoterephthalate units wherein the alkylene radical has from 2 to 10 carbon atoms.
Claim 2
Dependent Claim
40 words
A filament-forming random copolyester resin of at least 75 mol % of ethylene-2,6-naphthalene dicarboxylate units and at least 5 mol % up to 25 mol % of alkylene-2,5-dibromoterephthalate units wherein the alkylene radical has from 2 to 10 carbon atoms.
Claim 3
Dependent Claim
12 words
The copolyester resin of claim 1 wherein the alkylene radical is ethylene.
Claim 4
Dependent Claim
52 words
The copolyester resin of claim 1 having dispersed therein a metal compound selected from the group consisting of antimony oxides, antimony salts of α-hydroxycarboxylic or α,β-dicarboxylic acid, zinc oxide and alumina such that the metal is present in an amount of from 0.5 to 5% based on the weight of the resin.
Claim 5
Dependent Claim
13 words
The copolyester resin of claim 1 in the form of a shaped article.
Claim 6
Dependent Claim
14 words
The copolyester resin shaped article of claim 4 in the form of textile fibers.
References Cited (Backward Citations)
US3110547A
Cited
US3265762A
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US3483157A
Cited
US3794617A
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US3763644A
Cited
US3775374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |