Patent US3970534A successfully refreshed from Google Patents.
US3970534A
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Graft copolymer and process for preparation thereof
Assignee: Maruzen Petrochemical Co Ltd
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Filing: 1975-01-13
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Granted: 1976-07-20
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Expires: 1995-01-13
Abstract
Abstract A graft copolymer comprising a hydrocarbon polymer main chain and a side chain composed mainly of a styrene compound of the following formula (I) ##SPC1## wherein R is a hydrogen atom or an R'CO group, in which R' is a hydrocarbon group having 1 to 20 carbon atoms, and a polyene compound grafted to the hydrocarbon polymer main chain and a process for preparing the graft copolymer comprising graft-copolymerizing the above copolymer components with the hydrocarbon polymer by ionizing radiation. The graft copolymer is especially suitable as an ion-exchange membrane or a basic polymer matrix for an ion-exchange membrane.
Inventors
- 👤 Hiroshi Fujiwara
- 👤 Koichi Asano
- 👤 Akio Sugishita
- 👤 Asao Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:42
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/16; C08J7/18; C08F; C08F255/00; C08F257/00; C08F8/00; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; C08J5/2231; C08J5/2243; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/08; C08J2353/00; C08J2353/02
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
103 words
A graft copolymer comprising a hydrocarbon polymer main chain and a side chain composed mainly of a styrene compound of the following general formula (I) ##SPC13## wherein R is a hydrogen atom or an R'CO group, in which R' is a hydrocarbon group having 1 to 20 carbon atoms, and a polyene compound containing at least two polymerizable double bonds in the molecule grafted to the hydrocarbon polymer main chain, the grafting ratio of said styrene compound being about 0.1 to 500% and the grafting ratio of said polyene compound being about 0.1 to 100% based on the weight of the hydrocarbon polymer.
Claim 2
Dependent Claim
103 words
A graft copolymer comprising a hydrocarbon polymer main chain and a side chain composed mainly of a styrene compound of the following general formula (I) ##SPC13## wherein R is a hydrogen atom or an R'CO group, in which R' is a hydrocarbon group having 1 to 20 carbon atoms, and a polyene compound containing at least two polymerizable double bonds in the molecule grafted to the hydrocarbon polymer main chain, the grafting ratio of said styrene compound being about 0.1 to 500% and the grafting ratio of said polyene compound being about 0.1 to 100% based on the weight of the hydrocarbon polymer.
Claim 3
Dependent Claim
42 words
The graft copolymer of claim 1, wherein said hydrocarbon polymer is an aliphatic hydrocarbon polymer, an aromatic hydrocarbon polymer, an alicyclic hydrocarbon polymer, or a copolymer derived from at least two of an aliphatic monomer, an aromatic monomer and an alicyclic monomer.
Claim 4
Dependent Claim
12 words
The graft copolymer of claim 1, wherein said hydrocarbon polymer is polyethylene.
Claim 5
Dependent Claim
12 words
The graft copolymer of claim 1, wherein said hydrocarbon polymer is polypropylene.
Claim 6
Dependent Claim
12 words
The graft copolymer of claim 1, wherein said hydrocarbon polymer is polystyrene.
Claim 7
Dependent Claim
17 words
The graft copolymer of claim 1, wherein said hydrocarbon polymer is in the form of a film.
Claim 8
Dependent Claim
17 words
The graft copolymer of claim 1, wherein said styrene compound of the general formula (I) is hydroxystyrene.
Claim 9
Dependent Claim
18 words
The graft copolymer of claim 1, wherein said styrene compound of the general formula (I) is an acyloxystyrene.
Claim 10
Dependent Claim
19 words
The graft copolymer of claim 8, wherein said acyloxystyrene contains an acyl group having 2 to 21 carbon atoms.
Claim 11
Dependent Claim
11 words
The graft copolymer of claim 9, wherein said acyloxystyrene is acetoxystyrene.
Claim 12
Dependent Claim
25 words
The graft copolymer of claim 1, wherein said polyene compound is an aliphatic compound, an alicyclic compound, or an aromatic compound having polymerizable double bonds.
Claim 13
Dependent Claim
12 words
The graft copolymer of claim 11, wherein said polyene compound is divinylbenzene.
Claim 14
Dependent Claim
12 words
The graft copolymer of claim 11, wherein said polyene compound is isoprene.
Claim 15
Dependent Claim
28 words
The graft copolymer of claim 1, wherein the weight ratio of the styrene compound of the general formula (I) to the polyene compound is about 200:1 to 1:1.
Claim 16
Dependent Claim
22 words
The graft copolymer of claim 1, wherein said styrene compound of the general formula (I) is hydroxystyrene which further contains ion-exchange groups.
Claim 17
Dependent Claim
21 words
The graft copolymer of claim 15, wherein said ion-exchange groups are sulfonic acid groups, quaternary ammonium groups, or quaternary phosphonium groups.
Claim 18
Dependent Claim
31 words
The graft copolymer of claim 15, wherein the grafting ratio of the hydroxystyrene is about 5 to 500%, and the grafting ratio of the polyene compound is about 0.5 to 100%.
Claim 19
Dependent Claim
44 words
The graft copolymer of claim 1, wherein the amount of (1) the styrene compound of the general formula (I) and (2) the polyene compound in the side chain is 70% by weight based on the total weight of the components of the side chain.
Claim 20
Dependent Claim
67 words
A process for preparing a graft copolymer, which comprises graft copolymerizing a hydrocarbon polymer with monomers comprising mainly a styrene compound of the general formula (I) ##SPC14## wherein R is a hydrogen atom or an R'CO group, in which R' is a hydrocarbon group having 1 to 20 carbon atoms, and a polyene compound containing at least two polymerizable double bonds in the molecule using ionizing radiation.
Claim 21
Dependent Claim
67 words
A process for preparing a graft copolymer, which comprises graft copolymerizing a hydrocarbon polymer with monomers comprising mainly a styrene compound of the general formula (I) ##SPC14## wherein R is a hydrogen atom or an R'CO group, in which R' is a hydrocarbon group having 1 to 20 carbon atoms, and a polyene compound containing at least two polymerizable double bonds in the molecule using ionizing radiation.
Claim 22
Dependent Claim
20 words
The process of claim 19, wherin said hydrocarbon polymer is subjected to ionizing radiation in the absence of the monomers.
Claim 23
Dependent Claim
20 words
The process of claim 19, wherein said hydrocarbon polymer is subjected to ionizing radiation in the presence of the monomers.
Claim 24
Dependent Claim
30 words
The process of claim 19, including reacting the styrene compound of the general formula (I) first with the hydrocarbon polymer, and then reacting the polyene compound with the hydrocarbon polymer.
Claim 25
Dependent Claim
27 words
The process of claim 19, wherein a mixture of the styrene compound of the general formula (I) and the polyene compound is reacted with the hydrocarbon polymer.
Claim 26
Dependent Claim
29 words
The process of claim 19, wherein said styrene compound of the general formula (I) is an acyloxystyrene, and the process includes hydrolyzing the acyl group after the graft copolymerization.
Claim 27
Dependent Claim
34 words
The process of claim 19, including introducing ion-exchange groups into the product after the graft copolymerization, and if the styrene compound is an acyloxystyrene, after hydrolyzing the hydrolyzed product subsequent to the graft copolymerization.
References Cited (Backward Citations)
US3073667A
Cited
US3304272A
Cited
US3162696A
Cited
US3700609A
Cited
US3634218A
Cited
US3639516A
Cited
US3847840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |