Patent US4318836A successfully refreshed from Google Patents.
US4318836A
Expired / Lapsed
US
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Titanium dioxide filled polyphenylene ether compositions
Assignee: General Electric Co
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Filing: 1980-11-24
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Granted: 1982-03-09
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Expires: 2000-11-24
Abstract
Abstract Compositions comprising a polyphenylene ether resin, an impact modifier such as an A-B-A1 block copolymer, a plasticizer and particulate titanium dioxide in which the particles have a mean particle size no greater than 0.6 micron, provide unexpected retention of Gardner impact resistance.
Inventors
- 👤 Visvaldis Abolins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:00
CPC Classifications
C; C08; C08L; C08L53/00; C08L53/02; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
36 words
A thermoplastic composition comprising: (a) a polyphenylene ether resin, alone, or together with an impact modifier; (b) an effective amount of a plasticizer; and (c) titanium dioxide having mean particle size no greater than 0.6 micron.
Claim 2
Dependent Claim
36 words
A thermoplastic composition comprising: (a) a polyphenylene ether resin, alone, or together with an impact modifier; (b) an effective amount of a plasticizer; and (c) titanium dioxide having mean particle size no greater than 0.6 micron.
Claim 3
Dependent Claim
42 words
A composition as defined in claim 1, in which the impact modifier is an A-B-A 1 block copolymer wherein terminal blocks A and A 1 are derived from a vinyl aromatic compound and center block B is derived from a conjugated diene.
Claim 4
Dependent Claim
20 words
A composition as defined in claim 2, in which the terminal blocks are polystyrene and the center block is polybutadiene.
Claim 5
Dependent Claim
17 words
A composition as defined in claim 2, in which the A-B-A 1 block copolymer has been hydrogenated.
Claim 6
Dependent Claim
104 words
A composition as defined in claim 1, in which the polyphenylene ether resin has the formula ##STR3## wherein the oxygen ether atom of one unit is connected to the benzene nucleus of the next adjoining unit, n is a positive integer and is at least 50, and each Q is a monovalent substituent selected from the group consisting of hydrogen, halogen, hydrocarbon radicals free of a tertiary alpha-carbon atom, halohydrocarbon radicals having at least two carbon atoms between the halogen atom and the phenyl nucleus, hydrocarbonoxy radicals and halohydrocarbonoxy radicals having at least two carbon atoms between the halogen atom and the phenyl nucleus.
Claim 7
Dependent Claim
16 words
A composition as defined in claim 1, in which the polyphenylene ether resin is poly(2,6-dimethyl-1,4-phenylene) ether.
Claim 8
Dependent Claim
14 words
A composition as defined in claim 1, in which the plasticizer is triaryl phosphate.
Claim 9
Dependent Claim
14 words
A composition as defined in claim 1, in which the plasticizer is triphenyl phosphate.
Claim 10
Dependent Claim
60 words
A composition as defined in claim 1, comprising from about 5 to about 95 parts by weight of said polyphenylene ether resin, from about 95 to 5 parts by weight of said impact modifier, from about 5 to about 50 parts by weight of said plasticizer and from about 5 to about 50 parts by weight of said titanium dioxide.
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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) | 1985-03-08 | 1985-09-07 | 1986-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-08 | 1989-09-07 | 1990-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-08 | 1993-09-07 | 1994-03-09 | $7700.00 | Window Closed / Lapsed |