US3671487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass reinforced polyester resins containing polytetrafluoroethylene and flame retardant additives
Assignee: General Electric Co
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Filing: 1971-05-05
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Granted: 1972-06-20
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Expires: 1991-05-05
Abstract
Abstract Flame retardant thermoplastic molding compositions are provided comprising a normally flammable linear polyester, filamentous glass, a flame retardant agent and a polytetrafluoroethylene resin. The use of the polytetrafluoroethylene resin controls dripping and permits the flame retardant agent to be used in amounts sufficient to render the compositions non-burning or self-extinguishing without detracting from their physical properties.
Inventors
- 👤 Visvaldis Abolins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:31
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/02; C08K5/03; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08L; C08L67/00; C08L67/02; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
30 words
A composition as defined in claim 1 wherein said polyester is selected from the group consisting of polymeric glycol terphthalate and isophthalate esters having repeating units of the general formula
Claim 2
Dependent Claim
13 words
A composition as defined in claim 2 wherein said polyester is poly(ethylene terephthalate).
Claim 3
Dependent Claim
13 words
A composition as defined in claim 2 wherein said polyester is poly(1,4-butylene terephthalate).
Claim 4
Dependent Claim
72 words
A composition as defined in claim 1 wherein said flame retardant additive is a halogen-containing compound; a halogen-containing compound in admixture with antimony oxide; elemental phosphorus or a phosphorus compound; a halogen-containing compound in admixture with a phosphorus compound; a compound containing phosphorus-nitrogen bonds; or a mixture of the foregoing, and said compound is present in an amount of from 0.5 to 50 parts by weight per hundred parts of said resin.
Claim 5
Dependent Claim
78 words
A composition as defined in claim 5 wherein said halogen containing compound is an aromatic halogen containing compound selected from the group consisting of chlorinated benzene; brominated benzene; chlorinated biphenyl; chlorinated terphenyl; brominated biphenyl; brominated terphenyl; a compound comprising two phenyl radicals separated by a divalent alkylene or oxygen group and having at least two substituents selected from the group consisting of chlorine and bromine per phenyl radical; and a mixture of at least two of the foregoing.
Claim 6
Dependent Claim
14 words
A composition as defined in claim 6 wherein said organic halogen compound is hexabromobenzene.
Claim 7
Dependent Claim
16 words
A composition as defined in claim 6 wherein said organic halogen compound is a chlorinated biphenyl.
Claim 8
Dependent Claim
19 words
A composition as defined in claim 5 wherein said flame retardant additive is hexabromobenzene in admixture with antimony oxide.
Claim 9
Dependent Claim
40 words
A composition as defined in claim 5 wherein said flame retardant additive is selected from the group consisting of elemental phosphorus; organic phosphonic acids, phosphonates, phosphinates, phosphonites, phosphinites, phosphine oxides, phosphines, phosphites, phosphates and mixtures of any of the foregoing.
Claim 10
Dependent Claim
15 words
A composition as defined in claim 10 wherein said flame retardant additive is triphenyl phosphate.
Claim 11
Dependent Claim
22 words
A composition as defined in claim 5 wherein said flame retardant additive is a mixture of hexabromobenzene, antimony oxide and triphenyl phosphate.
Claim 12
Dependent Claim
20 words
A composition as defined in claim 5 wherein said flame retardant additive is a mixture of hexabromobenzene and triphenyl phosphate.
Claim 13
Dependent Claim
16 words
A composition as defined in claim 10 wherein said flame retardant additive is triphenyl phosphine oxide.
Claim 14
Dependent Claim
23 words
A composition as defined in claim 5 wherein said flame retardant additive is a mixture of hexabromobenzene, antimony oxide and triphenyl phosphine oxide.
Claim 15
Dependent Claim
23 words
A composition as defined in claim 5 wherein said flame retardant additive is a mixture of a chlorinated biphenyl and triphenyl phosphine oxide.
Claim 16
Dependent Claim
30 words
A composition as defined in claim 1 wherein said polytetrafluoroethylene resin is present in an amount of from 0.5 to 2.5 parts by weight per hundred parts of said resin.
Claim 17
Dependent Claim
122 words
A self-extinguishing and non-dripping reinforced thermoplastic composition for molding comprising a. a normally flammable high molecular weight linear poly(1,4-butylene terephthalate); b. filamentous glass reinforcement, in the form of dispersed fibrous chopped strands, in an amount of from 5 to 40 percent by weight based oN the combined weight of said glass and said resin; c. as a flame retardant additive a mixture of hexabromobenzene, from about 8 to about 12 parts by weight per hundred parts by weight of said resin, and antimony oxide, from about 2 to about 5 parts by weight per hundred parts by weight of said resin; and d. a polytetrafluoroethylene resin, from about 0.5 to 2.5 parts by weight per hundred parts by weight of said resin.
Claim 18
Dependent Claim
33 words
A composition as defined in claim 18 wherein the surface of said glass reinforcement is substantially free of sizing and the filament lengths in said glass are between about 0.000005 and about 0.125inch.
Claim 19
Dependent Claim
26 words
A composition as defined in claim 17 wherein the polytetrafluoroethylene resin has an average particle size of from about 0.3 to about 0.7 millimeters, before blending.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |