Patent US4373052A successfully refreshed from Google Patents.
US4373052A
Expired / Lapsed
US
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Polyphenylene ether compositions
Assignee: General Electric Co
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Filing: 1981-09-23
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Granted: 1983-02-08
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Expires: 2001-09-23
Abstract
Abstract Improved polyphenylene ether compositions are described. These compositions contain an amount of talc filler effective to provide an UL arc tracking rate of less than 1 inch/minute. Improvement in the impact strength and other physical properties of these compositions may be obtained through incorporation of low molecular weight terblock copolymer having polystyrene endblocks and a rubber midblock.
Inventors
- 👤 Visvaldis Abolins
- 👤 Bruce A. Luxon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:16
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/42; H01B3/427; C; C08; C08K; C08K3/00; C08K3/34; C08L; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; C08L75/00; C08L81/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
32 words
A thermoplastic resin composition which comprises an intimate admixture of polyphenylene ether resin with an amount of talc filler effective to provide an UL arc tracking rate of less than 1 inch/minute.
Claim 2
Dependent Claim
32 words
A thermoplastic resin composition which comprises an intimate admixture of polyphenylene ether resin with an amount of talc filler effective to provide an UL arc tracking rate of less than 1 inch/minute.
Claim 3
Dependent Claim
19 words
A composition as defined in claim 1, wherein the talc filler is at least about 45% by total weight.
Claim 4
Dependent Claim
22 words
A composition as defined in claim 1, wherein said composition additionally contains a terblock copolymer with polystyrene endblocks and a rubber midblock.
Claim 5
Dependent Claim
20 words
A composition as defined in claim 3, wherein the talc filler is from about 45 to 60% by total weight.
Claim 6
Dependent Claim
22 words
A composition as defined in claim 3, wherein the ratio of terblock copolymer to polyphenylene ether resin is from 2:1 to 1:20.
Claim 7
Dependent Claim
12 words
A composition as defined in claim 3, wherein the midblock is hydrogenated.
Claim 8
Dependent Claim
14 words
A composition as defined in claim 6, wherein the midblock is an ethylene/butadiene midblock.
Claim 9
Dependent Claim
20 words
A composition as defined in claim 3, wherein the terblock copolymer has a molecular weight of less than about 100,000.
Claim 10
Dependent Claim
15 words
A composition as defined in claim 8, wherein the midblock is a hydrogenated ethylene/butadiene midblock.
Claim 11
Dependent Claim
21 words
A composition as defined in claim 9, wherein the terblock copolymer has a molecular weight of between about 30,000 and 80,000.
Claim 12
Dependent Claim
20 words
A composition as defined in claim 10, wherein the copolymer has a styrene to rubber weight ratio of about 30:70.
Claim 13
Dependent Claim
19 words
A composition as defined in claim 11, wherein the terblock copolymer is from 5 to 25% by composition weight.
Claim 14
Dependent Claim
23 words
A composition as defined in claim 12, wherein the total terblock copolymer to polyphenylene ether resin weight ratio is from 2:1 to 1:20.
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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) | 1986-02-07 | 1986-08-09 | 1987-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-07 | 1990-08-09 | 1991-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-07 | 1994-08-09 | 1995-02-08 | $7700.00 | Window Closed / Lapsed |