Patent US3887646A successfully refreshed from Google Patents.
US3887646A
Expired / Lapsed
US
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Resinous compositions containing polyphenylene ether, styrene rubber and rubber-modified chlorostyrene polymer
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1972-10-30
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Granted: 1975-06-03
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Expires: 1992-10-30
Abstract
Abstract A thermoplastic blended composition which possesses greatly superior flame retardancy, containing a polyphenylene ether, high styrene rubber and a rubber-modified chlorostyrene polymer in the respective ranges of 40-60 percent, 5-30 percent and 20-50 percent, by weight, the total of the three components amounting to 100 percent by weight.
Inventors
- 👤 Eiichi Yonemitsu
- 👤 Akitoshi Sugio
- 👤 Masanobu Masu
- 👤 Masaharu Kimura
- 👤 Seiichi Kamiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:09
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02; C08L; C08L51/00; C08L51/04; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; C08L67/00; C08L69/00; C08L77/00; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S525/00; Y10S525/905; Y10S525/912
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
15 words
A THERMOPLASTIC BLENDED COMPOSITION COMPRISING A. A POLYPHENYLENE ETHER HAVING RECURRING UNITS OF THE FORMULA
Claim 2
Dependent Claim
15 words
A THERMOPLASTIC BLENDED COMPOSITION COMPRISING A. A POLYPHENYLENE ETHER HAVING RECURRING UNITS OF THE FORMULA
Claim 3
Dependent Claim
15 words
A thermoplastic blended composition comprising a. a polyphenylene ether having recurring units of the formula
Claim 4
Dependent Claim
15 words
A thermoplastic blended composition comprising a. a polyphenylene ether having recurring units of the formula
Claim 5
Dependent Claim
50 words
A composition according to claim 1 wherein said component (c) is a rubber-modified chlorostyrene polymer composed of units derived from the conjugated diene monomer and units derived from a mixture containing more than 50 percent by weight of chlorostyrene, the remainder of the mixture being styrene or a derivative thereof.
Claim 6
Dependent Claim
24 words
A composition according to claim 1 further comprising at least one member selected from the group consisting of thermal stabilizers, plasticizers and flame retardants.
Claim 7
Dependent Claim
30 words
A composition according to claim 1 wherein said composition has an inflammability corresponding to, or exceeding, the level of SE-1 in the combustion test in accordance with the UL-Subject-94 Standards.
Claim 8
Dependent Claim
25 words
A composition according to claim 3 wherein said flame retardants are selected from the group consisting of decabromobiphenyl, pentabromophenol, pentabromotoluene, hexabromobenzene, decabromodiphenylcarbonate and tetrabromophthalic anhydride.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |