US3929931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft copolymer of styrene type compound and a polyphenylene ether
Assignee: Asahi Kasei Corp
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Filing: 1974-08-28
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Granted: 1975-12-30
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Expires: 1994-08-28
Abstract
Abstract A novel graft copolymer composition comprising 30 to 90 wt. % of a graft copolymer containing substantially no polyphenylene ether homopolymer and 10 to 70 wt. % of a styrene type compound polymer having a number average molecular weight in the range from 50,000 to 200,000. The graft copolymer is prepared by graft polymerizing 20 to 200 parts by weight of a styrene type compound on an oligophenylene ether with a polymerization degree of 60 to 90. The composition has excellent resistance to creep.
Inventors
- 👤 Shinichi Izawa
- 👤 Katsuhiko Tsuzimura
- 👤 Ken Mizushiro
- 👤 Juro Ozeki
- 👤 Yoshiaki Sugawara
- 👤 Tsutomu Tanaka
- 👤 Astuo Nakanishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:04
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/08; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
111 words
A GRAFT COPOLYMER COMPOSITION WHICH COMPRISES 30 TO 90 WT.% OF A GRAFT COPOLYMER, 10 TO 70 WT. % OF A STYRENE TYPE COMPOUND POLYMER HAVING A NUMBER AVERAGE MOLECULAR WEIGHT IN THE RANGE FROM 50,000 T0 200,000 AND SELECTED FROM THE GROUP CONSISTING OF STYRENE, LOWER ALKYL STYRENES AND HALOSTYRENES, SAID GRAFT COPOLYMER CONTAINING SUBSTANTIALLY NO POLYPHENYLENE ETHER HOMOPOLYMER AND HAVING BEEN PREPARED BY GRAFT POLYMERIZING WITH STIRRING UNDER ANHYDROUS CONDITIONS AT A TEMPERATURE OF 130* TO 200*C. 20 TO 200 PARTS BY WEIGHT OF A STYRENE TYPE COMPOUND SELECTED FROM THE GROUP CONSISTING OF STYRENE, LOWER-ALKYL STYRENES AND HALOSTYRENS ON 100 PARTS OF AN OLIGOPHENYLENE ETHER HAVING THE FORMULA
Claim 2
Dependent Claim
111 words
A GRAFT COPOLYMER COMPOSITION WHICH COMPRISES 30 TO 90 WT.% OF A GRAFT COPOLYMER, 10 TO 70 WT. % OF A STYRENE TYPE COMPOUND POLYMER HAVING A NUMBER AVERAGE MOLECULAR WEIGHT IN THE RANGE FROM 50,000 T0 200,000 AND SELECTED FROM THE GROUP CONSISTING OF STYRENE, LOWER ALKYL STYRENES AND HALOSTYRENES, SAID GRAFT COPOLYMER CONTAINING SUBSTANTIALLY NO POLYPHENYLENE ETHER HOMOPOLYMER AND HAVING BEEN PREPARED BY GRAFT POLYMERIZING WITH STIRRING UNDER ANHYDROUS CONDITIONS AT A TEMPERATURE OF 130* TO 200*C. 20 TO 200 PARTS BY WEIGHT OF A STYRENE TYPE COMPOUND SELECTED FROM THE GROUP CONSISTING OF STYRENE, LOWER-ALKYL STYRENES AND HALOSTYRENS ON 100 PARTS OF AN OLIGOPHENYLENE ETHER HAVING THE FORMULA
Claim 3
Dependent Claim
21 words
A composition according to claim 1 wherein the composition consists essentially of said graft copolymer and said styrene type compound polymer.
Claim 4
Dependent Claim
19 words
A composition according to claim 1 wherein the composition includes 2 to 15 wt. % of a synthetic rubber.
Claim 5
Dependent Claim
14 words
A composition according to claim 1 wherein the styrene type compound polymer is polystyrene.
Claim 6
Dependent Claim
25 words
A composition according to claim 1 wherein the styrene is used in an amount of 25 to 170 parts per 100 parts of polyphenylene ether.
Claim 7
Dependent Claim
13 words
A composition according to claim 5 wherein R1 and R2 are both methyl.
Claim 8
Dependent Claim
27 words
A composition according to claim 1 wherein the polyphenylene ether used for preparation of the graft copolymer has a number average polymerization degree between 65 and 85.
Claim 9
Dependent Claim
18 words
A composition according to claim 1 wherein the graft copolymer is prepared in the absence of a solvent.
Claim 10
Dependent Claim
24 words
A composition according to claim 1 wherein the graft copolymer is prepared in the presence of an organic solvent inert under the reaction conditions.
Claim 11
Dependent Claim
12 words
A composition according to claim 9 wherein the solvent is a hydrocarbon.
Claim 12
Dependent Claim
18 words
A composition according to claim 9 wherein the solvent is an aromatic hydrocarbon or a halogenated aromatic hydrocarbon.
Claim 13
Dependent Claim
12 words
A composition according to claim 11 wherein the solvent is alkyl benzene.
Claim 14
Dependent Claim
15 words
A composition according to claim 1 containing 0 to 15% of a conjugated diene rubber.
Claim 15
Dependent Claim
13 words
A composition according to claim 13 containing 2 to 15% of said rubber.
Claim 16
Dependent Claim
15 words
A composition according to claim 14 wherein the rubber is polybutadiene, polyisoprene or butadiene-styrene copolymer.
References Cited (Backward Citations)
US3522326A
Cited
US3700630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |