US4283511A
Expired / Lapsed
US
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Method for producing modified polyphenylene oxides
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1980-03-31
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Granted: 1981-08-11
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Expires: 2000-03-31
Abstract
Abstract A method for producing a modified polyphenylene oxide which comprises polymerizing 69 to 25 parts by weight of a mixture of 97 to 45% by weight of a styrene monomer and 3 to 55% by weight of a polar vinyl mononer at 90 DEG to 190 DEG C. using 0.3 to 10 parts by weight of a radical initiator in an aqueous dispersion containing a dispersion stabilizer alone or in combination with at least one of a surfactant and an adhesion-preventing agent in the presence of 31 to 75 parts by weight of a polyphenylene oxide having a unit structure of the formula, <IMAGE> wherein R1, R2, R3 and R4 are each a hydrogen or halogen atom, or a hydrocarbon, substituted hydrocarbon, cyano, hydrocarbonoxy, substituted hydrocarbonoxy, nitro or amino group.
Inventors
- 👤 Katsuji Ueno
- 👤 Takashi Maruyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:50
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/06; C08F283/08; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
134 words
A method for producing a modified polyphenylene oxide which comprises polymerizing 69 to 25 parts by weight of a mixture of 97 to 45% by weight of a styrene monomer and 3 to 55% by weight of a polar vinyl monomer at 90° to 190° C. using 0.3 to 10 parts by weight of a radical initiator in an aqueous dispersion containing a dispersion stabilizer alone or in combination with at least one of a surfactant and an adhesion-preventing agent in the presence of 31 to 75 parts by weight of a polyphenylene oxide having a unit structure of the formula, ##STR11## wherein R 1 , R 2 , R 3 and R 4 are each a hydrogen or halogen atom, or a hydrocarbon, substituted hydrocarbon, cyano, hydrocarbonoxy, substituted hydrocarbonoxy, nitro or amino group.
Claim 2
Independent Claim
134 words
A method for producing a modified polyphenylene oxide which comprises polymerizing 69 to 25 parts by weight of a mixture of 97 to 45% by weight of a styrene monomer and 3 to 55% by weight of a polar vinyl monomer at 90° to 190° C. using 0.3 to 10 parts by weight of a radical initiator in an aqueous dispersion containing a dispersion stabilizer alone or in combination with at least one of a surfactant and an adhesion-preventing agent in the presence of 31 to 75 parts by weight of a polyphenylene oxide having a unit structure of the formula, ##STR11## wherein R 1 , R 2 , R 3 and R 4 are each a hydrogen or halogen atom, or a hydrocarbon, substituted hydrocarbon, cyano, hydrocarbonoxy, substituted hydrocarbonoxy, nitro or amino group.
Claim 3
Dependent Claim
46 words
A method according to claim 1, wherein said polyphenylene oxide is a member selected from the group consisting of poly-2,6-dimethyl-1,4-phenylene oxide, poly-2,6-diethyl-1,4-phenylene oxide, poly-2,6-dipropyl-1,4-phenylene oxide, poly-2-methyl-6-allyl-1,4-phenylene oxide, poly-2,6-dimethoxy-1,4-phenylene oxide, poly-2,6-dichloromethyl-1,4-phenylene oxide, poly-2,6-dibromomethyl-1,4-phenylene oxide, poly-2,6-ditolyl-1,4-phenylene oxide, poly-2,6-dichloro-1,4-phenylene oxide, poly-2,6-diphenyl-1,4-phenylene oxide, poly-2,5-dimethyl-1,4-phenylene oxide, poly-2,3,6-trimethyl-1,4-phenylene oxide and copolymers thereof.
Claim 4
Dependent Claim
13 words
A method according to claim 2, wherein the polyphenylene oxide is poly-2,6-dimethyl-1,4-phenylene oxide.
Claim 5
Dependent Claim
16 words
A method according to claim 2, wherein said copolymer is a copolymer of 2,6-xylenol and 2,3,6-trimethylphenol.
Claim 6
Dependent Claim
101 words
A method according to claim 1, wherein said styrene monomer is a styrene represented by the formula, ##STR12## wherein R 1 ', R 2 ', R 3 ', R 4 ' and R 5 ' are each a hydrogen or halogen atom, or a cyano, nitro, amino, hydroxy, carboxy, hydrocarbon, substituted hydrocarbon, hydrocarbonoxy or substituted hydrocarbonoxy group, or a mixture of said styrene and an α-substituted styrene represented by the formula, ##STR13## wherein R 1 ', R 2 ', R 3 ', R 4 ' and R 5 ' are as defined above and R 6 ' is a hydrocarbon group.
Claim 7
Dependent Claim
56 words
A method according to claim 5, wherein each R 1 ', R 2 ', R 3 ', R 4 ' and R 5 ' are chlorine, bromine, iodine, cyano, nitro, amino, carboxyl, methyl, ethyl, propyl, vinyl, allyl, benzyl, methylbenzyl, chloromethyl, bromomethyl, cyanoethyl, methoxy, ethoxy, phenoxy or monochloro and R 6 ' is methyl, ethyl or phenyl.
Claim 8
Dependent Claim
33 words
A method according to claim 5, wherein the styrene monomer is a member selected from the group consisting of styrene, 2,4-dichlorostyrene, p-methoxy-styrene, p-nitrostyrene, p-methylstyrene, p-phenylstyrene, p-acetoxystyrene, p-divinylbenzene, p-aminostyrene, p-(chloromethoxy)styrene, m-cyanostyrene, p-aminostyrene and o-hydroxystyrene.
Claim 9
Dependent Claim
26 words
A method according to claim 5, wherein the α-substituted styrene is a member selected from the group consisting of α-methylstyrene, o-methyl-α-methylstyrene, m-methyl-α-methylstyrene, p-methyl-α-methylstyrene, p-methoxy-α-methylstyrene and 1,1-diphenylethylene.
Claim 10
Dependent Claim
50 words
A method according to claim 1, wherein said polar vinyl monomer is a member selected from the group consisting of acrylonitrile, α-methacrylonitrile, α-ethacrylonitrile, methyl acrylate, methyl methacrylate, butyl acrylate, ethyl methacrylate, vinyl chloride, vinylidene chloride, vinyl acetate, N-vinylpyrrolidone, N-vinyl-N-methylacetamide, ethyl vinyl ether, 2-chloroethyl vinyl ether, glycidyl methacrylate and maleic anhydride.
Claim 11
Dependent Claim
21 words
A method according to claim 1, wherein the polymerization is carried out at a temperature of from 115° to 180° C.
Claim 12
Dependent Claim
20 words
A method according to claim 1, wherein the weight ratio of said mixture to polyphenylene oxide is 65-30 to 35-70.
Claim 13
Dependent Claim
20 words
A method according to claim 1, wherein the amount of styrene in the mixture is 44 to 95% by weight.
Claim 14
Dependent Claim
13 words
A method according to claim 9, wherein the polar vinyl monomer is acrylonitrile.
Claim 15
Dependent Claim
15 words
A modified polyphenylene oxide prepared by the method of anyone of claims 1 to 12.
References Cited (Backward Citations)
US3862263A
Cited
US3781382A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |