US3915926A
Expired / Lapsed
US
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Flame retardant thermoplastic compositions
Assignee: General Electric Co
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Filing: 1974-07-23
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Granted: 1975-10-28
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Expires: 1994-07-23
Abstract
Abstract Normally flammable polyester resins (a) are rendered flameretardant without loss in toughness by combination with (b) a flame retardant amount of (i) an aromatic carbonate copolymer, from 25 to 75 wt. percent of the repeating units comprising chloro- or bromo-substituted dihydric phenol units; (ii) an aromatic carbonate homopolymer having repeating units comprising chloro- or bromo-substituted dihydric phenol units in combination with an aromatic carbonate homopolymer having repeating dihydric phenol units; or (iii) a combination of (i) with an aromatic carbonate homopolymer having repeating dihydric phenol units, (c) an antimony-containing compound and (d) a reinforcing filler.
Inventors
- 👤 Allen D Wambach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:30
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/40; C08L69/00; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
174 words
A FLAME RETARDANT THERMOPLASTIC COMPOSITION COMPRISING FROM 90 TO 10 PARTS BY WEIGHT OF A RESINOUS COMPOSITION WHICH COMPRISES: A. A NORMALLY FLAMMABLE HIGH MOLECULAR WEIGHT POLYESTER AND A FLAME-RETARDANT AMOUNT OF FROM 0.5 TO 50 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF THE RESINOUS COMPONENTS OF B. (I) AN AROMATIC CARBONATE COPOLYMER IN WHICH FROM 25 TO 75 WT. PERCENT OF THE REPEATING UNITS COMPRISE CHLORO- OR BROMO-SUBSTITUTED DIHYDRIC PHENOL UNITS AND THE REMAINDER OF THE REPEATING UNITS COMPRISE DIHYDRIC PHENOL, GLYCOL OR DICARBOXYLIC ACID UNITS, II. AN AROMATIC CARBONATE HOMOPOLYMER IN WHICH THE REPEATING UNITS COMPRISE CHLORO- OR BROMO-SUBSTITUTED DIHYDRIC PHENOL UNITS IN COMBINATION WITH AN AROMATIC CARBONATE HOMOPOLYMER COMPRISING DIHYDRIC PHENOL UNITS, OR III. A COMBINATION OR (I) WITH AN AROMATIC CARBONATE HOMOPOLYMER COMPRISING DIHYDRIC PHENOL UNITS, IN COMBINATION WITH C. ABOUT 0.5 TO ABOUT 20 PARTS BY WEIGHT PER 100 PARTS OF COMBINED RESINOUS COMPONENTS IN THE COMPOSITION OF AN INORGANIC OR ORGANIC ANTIMONY-CONTAINING COMPOUND, AND D. FROM 10 TO 90 PARTS BY WEIGHT OF A REINFORCING FILLER.
Claim 2
Dependent Claim
174 words
A FLAME RETARDANT THERMOPLASTIC COMPOSITION COMPRISING FROM 90 TO 10 PARTS BY WEIGHT OF A RESINOUS COMPOSITION WHICH COMPRISES: A. A NORMALLY FLAMMABLE HIGH MOLECULAR WEIGHT POLYESTER AND A FLAME-RETARDANT AMOUNT OF FROM 0.5 TO 50 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF THE RESINOUS COMPONENTS OF B. (I) AN AROMATIC CARBONATE COPOLYMER IN WHICH FROM 25 TO 75 WT. PERCENT OF THE REPEATING UNITS COMPRISE CHLORO- OR BROMO-SUBSTITUTED DIHYDRIC PHENOL UNITS AND THE REMAINDER OF THE REPEATING UNITS COMPRISE DIHYDRIC PHENOL, GLYCOL OR DICARBOXYLIC ACID UNITS, II. AN AROMATIC CARBONATE HOMOPOLYMER IN WHICH THE REPEATING UNITS COMPRISE CHLORO- OR BROMO-SUBSTITUTED DIHYDRIC PHENOL UNITS IN COMBINATION WITH AN AROMATIC CARBONATE HOMOPOLYMER COMPRISING DIHYDRIC PHENOL UNITS, OR III. A COMBINATION OR (I) WITH AN AROMATIC CARBONATE HOMOPOLYMER COMPRISING DIHYDRIC PHENOL UNITS, IN COMBINATION WITH C. ABOUT 0.5 TO ABOUT 20 PARTS BY WEIGHT PER 100 PARTS OF COMBINED RESINOUS COMPONENTS IN THE COMPOSITION OF AN INORGANIC OR ORGANIC ANTIMONY-CONTAINING COMPOUND, AND D. FROM 10 TO 90 PARTS BY WEIGHT OF A REINFORCING FILLER.
Claim 3
Dependent Claim
33 words
A flame retardant composition as defined in claim 1 wherein said normally flammable polyester resin is a poly(alkylene terephthalate, isophthalate or mixed isophthalate-terephthalate), said alkylene groups containing from 2 to 10 carbon atoms.
Claim 4
Dependent Claim
18 words
A flame retardant composition as defined in claim 2 wherein said normally flammable polyester resin is poly(1,4-butylene terephthalate).
Claim 5
Dependent Claim
26 words
A flame retardant composition as defined in claim 1 wherein said aromatic carbonate copolymer or homopolymer is a reaction product of phosgene and a dihydric phenol.
Claim 6
Dependent Claim
46 words
A flame retardant composition as defined in claim 1 wherein aromatic carbonate copolymer component (b) is one in which from 75 to 25 wt. percent of the repeating units comprise tetrabromobisphenol-A units and from 25 to 75 wt. percent of the repeating units comprise bisphenol-A units.
Claim 7
Dependent Claim
16 words
A flame retardant composition as defined in claim 1 wherein said antimony-containing compound is antimony oxide.
Claim 8
Dependent Claim
53 words
A flame retardant composition as defined in claim 5 wherein, in said aromatic carbonate copolymer, about 35 wt. percent of the repeating units comprise tetrabromobisphenol-A units and about 65 wt. percent of the repeating units comprise bisphenol-A units, and wherein said copolymer has an intrinsic viscosity of from about 0.2 to about 0.7.
Claim 9
Dependent Claim
135 words
A flame retardant thermoplastic composition comprising from 90 to 10 parts by weight of a resinous composition which comprises: a. a normally flammable high molecular weight poly(1,4-butylene terephthalate); and from 0.5 to 50 parts by weight per 100 parts by weight of the resinous components b. an aromatic carbonAte copolymer in which from 25 to 75 wt. percent of the repeating units comprise tetrachlorobisphenol-A or tetrabromobisphenol-A units and from 25 to 75 wt. percent of the repeating units comprise bisphenol-A units, and wherein said copolymer has an intrinsic viscosity of 0.2 to 0.7, in combination with c. about 0.5 to about 20 parts by weight per 100 parts of combined resinous components in the composition of an organic or inorganic antimony-containing compound; and d. from 10 to 90 parts by weight of a reinforcing filler.
Claim 10
Dependent Claim
135 words
A flame retardant thermoplastic composition comprising from 90 to 10 parts by weight of a resinous composition which comprises: a. a normally flammable high molecular weight poly(1,4-butylene terephthalate); and from 0.5 to 50 parts by weight per 100 parts by weight of the resinous components b. an aromatic carbonAte copolymer in which from 25 to 75 wt. percent of the repeating units comprise tetrachlorobisphenol-A or tetrabromobisphenol-A units and from 25 to 75 wt. percent of the repeating units comprise bisphenol-A units, and wherein said copolymer has an intrinsic viscosity of 0.2 to 0.7, in combination with c. about 0.5 to about 20 parts by weight per 100 parts of combined resinous components in the composition of an organic or inorganic antimony-containing compound; and d. from 10 to 90 parts by weight of a reinforcing filler.
Claim 11
Dependent Claim
47 words
A flame retardant thermoplastic composition as defined in claim 8 wherein said component (b) contains repeating units of tetrabromobisphenol-A units and bisphenol-A units and comprises from about 15 to about 50 parts by weight per 100 parts by weight of the total resinous components in said composition.
Claim 12
Dependent Claim
16 words
A flame retardant composition as defined in claim 8, wherein said antimony-containing compound is antimony oxide.
Claim 13
Dependent Claim
71 words
A flame retardant composition as defined in claim 9 wherein said polyester component (a) comprises from about 50 to about 85 parts by weight; said aromatic carbonate copolymer component (b) comprises from about 15 to about 50 parts by weight; and said antimony compound comprises from about 2 to about 10 parts by weight, all parts being based on 100 parts by weight of the total resinous components in the composition.
Claim 14
Dependent Claim
97 words
A flame retardant composition as defined in claim 11 wherein said poly(1,4-butylene terephthalate) component (a) comprises from about 60 to about 80 parts by weight; in said aromatic carbonate copolymer component (b) about 35 wt. percent of the repeating units comprise tetrabromobisphenol-A units and about 65 wt. percent of bisphenol-A units, the amount of component (b) comprises from about 20 to about 40 parts by weight; and the antimony compound comprises antimony oxide, about 3 to 7 parts by weight, all parts being based on 100 parts by weight of the total resinous components in said composition.
Claim 15
Dependent Claim
30 words
A flame retardant composition as defined in claim 1 wherein component (b) (ii) comprises in combination an aromatic carbonate homopolymer in which the repeating units comprise units of the formula
Claim 16
Dependent Claim
16 words
A flame retardant composition as defined in claim 13 wherein said antimony-containing compound is antimony oxide.
Claim 17
Dependent Claim
40 words
A flame retardant composition as defined in claim 13 wherein the units in the homopolymer of from 2 to 20 repeating units are tetrabromobisphenol-A units and the units in the homopolymer of at least 100 repeating units are bisphenol-A units.
Claim 18
Dependent Claim
54 words
A flame retardant composition as defined in claim 13 wherein said aromatic carbonate homopolymer of from about 2 to about 20 repeating units comprises from 30 to 70 wt. percent and said aromatic carbonate homopolymer of at least about 100 repeating units comprises from about 70 to about 30 wt. percent of said combination.
Claim 19
Dependent Claim
138 words
A flame retardant thermoplaStic composition comprising from 90 to 10 parts by weight of a resinous composition which comprises: a. a normally flammable high molecular weight poly(1,4-butylene terephthalate); and from 0.5 to 50 parts by weight per 100 parts of the resinous components of b. an aromatic carbonate homopolymer in which the repeating units comprise tetrabromobisphenol-A units, the average number of repeating units being from about 2 to about 20, in combination with an aromatic carbonate homopolymer in which the repeating units comprise bisphenol-A units, the average number of repeating units being at least about 100, in combination with c. about 0.5 to about 20 parts by weight per 100 parts of combined resinous components in the composition of an organic or inorganic antimony-containing compound; d. from 10 to about 40 percent by weight of a glass filler.
Claim 20
Dependent Claim
138 words
A flame retardant thermoplaStic composition comprising from 90 to 10 parts by weight of a resinous composition which comprises: a. a normally flammable high molecular weight poly(1,4-butylene terephthalate); and from 0.5 to 50 parts by weight per 100 parts of the resinous components of b. an aromatic carbonate homopolymer in which the repeating units comprise tetrabromobisphenol-A units, the average number of repeating units being from about 2 to about 20, in combination with an aromatic carbonate homopolymer in which the repeating units comprise bisphenol-A units, the average number of repeating units being at least about 100, in combination with c. about 0.5 to about 20 parts by weight per 100 parts of combined resinous components in the composition of an organic or inorganic antimony-containing compound; d. from 10 to about 40 percent by weight of a glass filler.
Claim 21
Dependent Claim
102 words
A flame retardant composition as defined in claim 17, wherein said poly(1,4-butylene terephthalate) component (a) comprises from about 50 to about 85 parts by weight; said aromatic carbonate homopolymer of from about 2 to about 20 repeating units comprises from about 10 to about 25 parts by weight; said aromatic carbonate homopolymer having at least about 100 repeating units comprises from about 5 to about 25 parts by weight, and said antimony compound is antimony trioxide from about 2 to about 10 parts by weight, all parts being based on 100 parts by weight of the total resinous components in said composition.
Claim 22
Dependent Claim
100 words
A flame retardant composition as defined in claim 18 wherein said poly(1,4-butylene terephthalate) component (a) comprises from about 70 to about 85 parts by weight; said aromatic carbonate homopolymer of from about 2 to about 20 repeating units comprises from about 10 to about 15 parts by weight; said aromatic carbonate homopolymer having at least about 100 repeating units comprises from about 5 to about 15 parts by weight and said antimony oxide comprises from about 2 to about 7 parts by weight, all parts being based on 100 parts by weight of the total resinous components in said composition.
Claim 23
Dependent Claim
51 words
A flame retardant composition as defined in claim 19 wherein from 35 to 55 wt. percent of said aromatic carbonate homopolymer having from about 2 to about 20 repeating units is combined with from 65 to 45 wt. percent of said aromatic carbonate homopolymer having at least about 100 repeating units.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |