Patent US3929930A successfully refreshed from Google Patents.
US3929930A
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Graft copolymerizing a 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 graft copolymer free from polyphenylene ether homopolymers is prepared by polymerizing 20 to 200 parts by weight of a styrene type compound at a temperature in the range from 130* to 200*C in the presence of 100 parts by weight of a polyphenylene ether and 0.1 to 15 parts by weight of a radical initiator. The graft copolymer is excellent in moldability and is also useful in making films, sheets, fibers, etc.
Inventors
- 👤 Shinichi Izawa
- 👤 Juro Ozeki
- 👤 Tsutomu Tanaka
- 👤 Atsuo Nakanishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:42
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/06; C08F283/08; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
63 words
A PROCESS FOR PRODUCING GRAFT COPOLYMERS CONTAINING SUBSTANTIALLY NO POLYPHENYLENE ETHER HOMOPOLYMERS COMPRISING GRAFT POLYMERIZING WITH STIRRING UNDER ANHYDROUS CONDITIONS 20 TO 200 PARTS OF A STYRENE TYPE COMPOUND OF THE GROUP CONSISTING OF STYRENE, LOWER ALKYL STYRENE AND HALOSTYRENES AT A TEMPERATURE OF 130*C TO 200*C IN THE PRESENCE OF 100 PARTS BY WEIGHT OF A POLYPHENYLENE ETHER REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
63 words
A PROCESS FOR PRODUCING GRAFT COPOLYMERS CONTAINING SUBSTANTIALLY NO POLYPHENYLENE ETHER HOMOPOLYMERS COMPRISING GRAFT POLYMERIZING WITH STIRRING UNDER ANHYDROUS CONDITIONS 20 TO 200 PARTS OF A STYRENE TYPE COMPOUND OF THE GROUP CONSISTING OF STYRENE, LOWER ALKYL STYRENE AND HALOSTYRENES AT A TEMPERATURE OF 130*C TO 200*C IN THE PRESENCE OF 100 PARTS BY WEIGHT OF A POLYPHENYLENE ETHER REPRESENTED BY THE FORMULA
Claim 3
Dependent Claim
13 words
A process according to claim 1 wherein the styrene type compound is styrene.
Claim 4
Dependent Claim
13 words
A process according to claim 2 wherein the temperature is 135* to 190*C.
Claim 5
Dependent Claim
25 words
A process according to claim 3 wherein the styrene is used in an amount of 25 to 170 parts per 100 parts of polyphenylene ether.
Claim 6
Dependent Claim
13 words
A process according to claim 4 wherein R1 and R2 are both methyl.
Claim 7
Dependent Claim
20 words
A process according to claim 1 wherein the polyphenylene ether has a number average polymerization degree between 60 and 280.
Claim 8
Dependent Claim
20 words
A process according to claim 6 wherein the polyphenylene ether has a number average polymerization degree between 70 and 250.
Claim 9
Dependent Claim
14 words
A process according to claim 1 carried out in the absence of a solvent.
Claim 10
Dependent Claim
17 words
A process according to claim 1 carried out in an organic solvent inert under the reaction conditions.
Claim 11
Dependent Claim
12 words
A process according to claim 9 wherein the solvent is a hydrocarbon.
Claim 12
Dependent Claim
18 words
A process according to claim 9 wherein the solvent is an aromatic hydrocarbon or a halogenated aromatic hydrocarbon.
Claim 13
Dependent Claim
13 words
A process according to claim 11 wherein the solvent is an alkyl benzene.
Claim 14
Dependent Claim
77 words
A process for producing graft copolymers containing substantially no polyphenylene ether homopolymers consisting essentially of graft polymerizing with stirring under anhydrous conditions in the absence of a solvent 25 to 170 parts of styrene at a temperature of 135* to 190*C in the presence of 100 parts by weight of poly(2,6-dimethylphenylene-1,4-ether) having a number average polymerization degree between 70 and 250 and 0.3 to 10 parts by weight of a radical initiator based on the polyphenylene ether.
Claim 15
Dependent Claim
77 words
A process for producing graft copolymers containing substantially no polyphenylene ether homopolymers consisting essentially of graft polymerizing with stirring under anhydrous conditions in the absence of a solvent 25 to 170 parts of styrene at a temperature of 135* to 190*C in the presence of 100 parts by weight of poly(2,6-dimethylphenylene-1,4-ether) having a number average polymerization degree between 70 and 250 and 0.3 to 10 parts by weight of a radical initiator based on the polyphenylene ether.
Claim 16
Dependent Claim
80 words
A process for producing graft copolymers containing substantially no polyphenylenE ether homopolymers consisting essentially of graft polymerizing with stirring under anhydrous conditions in an organic solvent inert under the reaction conditions 25 to 170 parts of styrene at a temperature of 135* to 190*C in the presence of 100 parts by weight of poly(2,6-dimethylphenylene-1,4-ether) having a number average polymerization degree between 70 and 250 and 0.3 to 10 parts by weight of a radical initiator based on the polyphenylene ether.
Claim 17
Dependent Claim
80 words
A process for producing graft copolymers containing substantially no polyphenylenE ether homopolymers consisting essentially of graft polymerizing with stirring under anhydrous conditions in an organic solvent inert under the reaction conditions 25 to 170 parts of styrene at a temperature of 135* to 190*C in the presence of 100 parts by weight of poly(2,6-dimethylphenylene-1,4-ether) having a number average polymerization degree between 70 and 250 and 0.3 to 10 parts by weight of a radical initiator based on the polyphenylene ether.
Claim 18
Dependent Claim
10 words
A graft copolymer prepared by the process of claim 1.
Claim 19
Dependent Claim
10 words
A graft copolymer prepared by the process of claim 5.
Claim 20
Dependent Claim
10 words
A graft copolymer prepared by the process of claim 13.
Claim 21
Dependent Claim
10 words
A graft copolymer prepared by the process of claim 14.
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 |