US4344878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant, non-dripping linear polyester compositions
Assignee: General Electric Co
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Filing: 1981-02-19
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Granted: 1982-08-17
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Expires: 2001-02-19
Abstract
Abstract Novel thermoplastic compositions are disclosed which include a linear polyester resin, a flame-retardant additive and polytetrafluoroethylene resin. These flame retardant, non-dripping compositions are particularly useful for molding applications.
Inventors
- 👤 Thomas J. Dolce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:09
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
53 words
A flame retardant, non-dripping thermoplastic molding composition which consists essentially of: (a) a linear polyester resin; (b) a flame retardant amount of a flame retardant additive consisting essentially of a halogen containing polycarbonate in admixture with antimony oxide; and (c) an amount of polytetrafluoroethylene resin that is sufficient to render the composition non-dripping.
Claim 2
Dependent Claim
53 words
A flame retardant, non-dripping thermoplastic molding composition which consists essentially of: (a) a linear polyester resin; (b) a flame retardant amount of a flame retardant additive consisting essentially of a halogen containing polycarbonate in admixture with antimony oxide; and (c) an amount of polytetrafluoroethylene resin that is sufficient to render the composition non-dripping.
Claim 3
Dependent Claim
47 words
A composition as defined in claim 1 wherein said polyester is selected from the group consisting of polymeric glycol terephthate and isophthalate esters having repeating units of the general formula: ##STR5## wherein n is a whole number of from 2 to 4, and mixtures of such esters.
Claim 4
Dependent Claim
13 words
A composition as defined in claim 1 wherein said polyester is poly(1,4-butylene terephthalate).
Claim 5
Dependent Claim
13 words
A composition as defined in claim 1 wherein sad polyester is poly(ethylene terephthalate).
Claim 6
Dependent Claim
27 words
A composition as defined in claim 1 wherein said flame retardant additive is present in an amount of 0.5 to 40 parts by weight of the composition.
Claim 7
Dependent Claim
18 words
A composition as defined in claim 1 wherein said halogen containing polycarbonate is derived from tetrabromobisphenol-A and bisphenol-A.
Claim 8
Dependent Claim
52 words
A composition as defined in claim 1 which includes from 50 to 80 parts by weight of poly(1,4-butylene terephthalate) from 0.5 to 35 parts by weight of a halogen containing polycarbonate; from 0.2 to 1 part by weight of polytetrafluoroethylene resin and from 0.2 to 3 parts by weight of antimony oxide.
Claim 9
Dependent Claim
61 words
A flame retardant, non-dripping thermoplastic molding composition which consists of: (a) from 50 to 80 parts by weight of poly(1,4-butylene terephthalate) resin; (b) from 0.5 to 35 parts by weight of a polycarbonate derived from tetrabromobisphenol-A and bisphenol-A; (c) from 0.2 to 1 part by weight of polytetrafluoroethylene resin; and (d) from 0.2 to 3 parts by weight of antimony oxide.
Claim 10
Dependent Claim
61 words
A flame retardant, non-dripping thermoplastic molding composition which consists of: (a) from 50 to 80 parts by weight of poly(1,4-butylene terephthalate) resin; (b) from 0.5 to 35 parts by weight of a polycarbonate derived from tetrabromobisphenol-A and bisphenol-A; (c) from 0.2 to 1 part by weight of polytetrafluoroethylene resin; and (d) from 0.2 to 3 parts by weight of antimony oxide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-16 | 1986-02-15 | 1986-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-16 | 1990-02-15 | 1990-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-16 | 1994-02-15 | 1994-08-17 | $7700.00 | Window Closed / Lapsed |