US4191685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition of polyphenylene ether, aromatic phosphate, aromatic halogen compound and impact modifier comprising diene polymer
Assignee: General Electric Co
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Filing: 1977-10-03
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Granted: 1980-03-04
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Expires: 1997-10-03
Abstract
Abstract Compositions comprising a polyphenylene ether and, optionally, a styrene resin, an aromatic phosphate, phosphonate or phosphine oxide, an aromatic halogen compound and an impact modifier comprising a diene polymer have excellent flame retardant properties during large scale flammability tests. The compositions will tolerate large amounts of aromatic halogen compound without discoloration and processing difficulties. In comparison with compositions of the present state of the art, peak burn temperatures are reduced, smoke is less dense, and flaming drips are eliminated in large as well as small scale burn tests.
Inventors
- 👤 William R. Haaf
- 👤 Gim F. Lee, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:05
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333; C08K5/52; C08K5/521; C08K5/5397; C08L; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
102 words
A flame retardant, impact resistant thermoplastic composition comprising (a) a polyphenylene ether resin; (b) an aromatic phosphate, aromatic phosphonate or aromatic phosphine oxide compound; (c) an aromatic halogen compound; and (d) an impact modifier comprising an elastomeric A-B-A or A-B block copolymer wherein A comprises a polymerized vinyl aromatic compound and B comprises a polymerized diene hydrocarbon, not including hydrogenated derivatives thereof, components (b) and (c) being present in an amount at least sufficient to render said composition flame retardant, and component (d) being present in an amount at least sufficient to improve the impact resistance of articles molded from said composition.
Claim 2
Dependent Claim
102 words
A flame retardant, impact resistant thermoplastic composition comprising (a) a polyphenylene ether resin; (b) an aromatic phosphate, aromatic phosphonate or aromatic phosphine oxide compound; (c) an aromatic halogen compound; and (d) an impact modifier comprising an elastomeric A-B-A or A-B block copolymer wherein A comprises a polymerized vinyl aromatic compound and B comprises a polymerized diene hydrocarbon, not including hydrogenated derivatives thereof, components (b) and (c) being present in an amount at least sufficient to render said composition flame retardant, and component (d) being present in an amount at least sufficient to improve the impact resistance of articles molded from said composition.
Claim 3
Dependent Claim
137 words
A composition as defined in claim 1 wherein the polyphenylene ether is present in an amount of from 50 to 95 parts per 100 parts by weight of the compositions and is of formula: ##STR4## wherein the oxygen ether atom of one unit is connected to the benzene nucleus of the next adjoining unit; n is a positive integer equal to at least 50; and each Q and Q' is a monovalent substituent selected from hydrogen, halogen, hydrocarbon radicals free of a tertiary alpha-carbon atom, halohydrocarbon radicals having at least two carbon atoms between the halogen atom and phenyl nucleus and being free of a tertiary-alpha-carbon atom, hydrocarbonoxy radicals being free of a tertiary-alpha-carbon atoms, or halohydrocarbonoxy radicals having at least two carbon atoms between the halogen atom and phenyl nucleus and being free of tertiary-alpha-carbon atom.
Claim 4
Dependent Claim
18 words
A composition as defined in claim 2 wherein each Q is lower alkyl and each Q' is hydrogen.
Claim 5
Dependent Claim
39 words
A composition as defined in claim 1 wherein the phosphate component (b) is of the formula: ##STR5## where each Q" is individually selected from the group of hydrogen and hydrocarbon radicals provided that at least one Q" is aryl.
Claim 6
Dependent Claim
25 words
A composition as defined in claim 1 wherein the aromatic halogen component (c) is a halogenated aromatic ring compound having at least two halogen atoms.
Claim 7
Dependent Claim
16 words
A composition as defined in claim 5 wherein the aromatic halogen component (c) is a polyhalobenzene.
Claim 8
Dependent Claim
24 words
A composition as defined in claim 1 wherein the aromatic halogen component is a biphenyl having at least two halogen atoms per aromatic ring.
Claim 9
Dependent Claim
13 words
A composition as defined in claim 7 wherein the halogen atoms are chlorine.
Claim 10
Dependent Claim
13 words
A composition as defined in claim 7 wherein the halogen atoms are bromine.
Claim 11
Dependent Claim
33 words
A composition as defined in claim 1 wherein the aromatic halogen component has two phenyl radicals joined by a bivalent radical and each phenyl radical has at least two halogen atoms substituted thereon.
Claim 12
Dependent Claim
19 words
A composition as defined in claim 10 wherein the bivalent radical is alkylene and the halogen atoms are chlorine.
Claim 13
Dependent Claim
19 words
A composition as defined in claim 10 wherein the bivalent radical is alkylene and the halogen atoms are bromine.
Claim 14
Dependent Claim
19 words
A composition as defined in claim 10 wherein the bivalent radical is oxygen and the halogen atoms are chlorine.
Claim 15
Dependent Claim
19 words
A composition as defined in claim 10 wherein the bivalent radical is oxygen and the halogen atoms are bromine.
Claim 16
Dependent Claim
12 words
A composition as defined in claim 4 wherein each Q" is phenyl.
Claim 17
Dependent Claim
16 words
A composition as defined in claim 1 wherein component (d) comprises polymerized styrene and polymerized butadiene.
Claim 18
Dependent Claim
39 words
A composition as defined in claim 1 wherein component (a) comprises poly(2,6-dimethyl-1,4-phenylene) ether; component (b) comprises triphenyl phosphate; component (c) comprises decabromodiphenyl oxide; and compound (d) comprises an A-B-A block copolymer including polystyrene terminal blocks and polybutadiene center blocks.
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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) | 1983-03-04 | 1983-09-03 | 1984-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-04 | 1987-09-03 | 1988-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-04 | 1991-09-03 | 1992-03-04 | $7700.00 | Window Closed / Lapsed |