Patent US3933754A successfully refreshed from Google Patents.
US3933754A
Expired / Lapsed
US
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Insoluble chloroprene polymer
Assignee: Denka Co Ltd
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Filing: 1974-07-24
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Granted: 1976-01-20
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Expires: 1994-07-24
Abstract
Abstract A toluene-insoluble gel polymer having a crosslinking density of at least 2.4 × 10 - 6 obtained by polymerizing chloroprene or a mixture of chloroprene with a small amount of at least one copolymerizable monomer to a monomer conversion of at least 80 percent in the presence of a crosslinking agent selected from the group consisting of a compound represented by the following formula: ##EQU1## wherein n is integer of from 1 to 8, ##EQU2## wherein n is integer of from 2 to 4, divinylbenzene and diallyl phthalate and a process for the preparation thereof.
Inventors
- 👤 Chojiro Kitagawa
- 👤 Ichiro Fukuoka
- 👤 Takashi Kadowaki
- 👤 Shoji Kimura
- 👤 Takehiko Nishimura
- 👤 Kanehisa Hanabusa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:35
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F36/14; C08F36/16; C08F36/18
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
88 words
A toluene-insoluble gel polymer having a crosslinking density of at least 2.4 × 10 - 6 obtained by polymerizing chloroprene or a mixture of chloroprene with a small amount of at least one copolymerizable monomer to a monomer conversion of at least 80 percent in the presence of a crosslinking agent selected from the group consisting of a compound represented by the following formula: ##EQU7## wherein n is integer of from 1 to 8, ##EQU8## wherein n is integer of from 2 to 4, divinylbenzene and diallyl phthalate.
Claim 2
Dependent Claim
88 words
A toluene-insoluble gel polymer having a crosslinking density of at least 2.4 × 10 - 6 obtained by polymerizing chloroprene or a mixture of chloroprene with a small amount of at least one copolymerizable monomer to a monomer conversion of at least 80 percent in the presence of a crosslinking agent selected from the group consisting of a compound represented by the following formula: ##EQU7## wherein n is integer of from 1 to 8, ##EQU8## wherein n is integer of from 2 to 4, divinylbenzene and diallyl phthalate.
Claim 3
Dependent Claim
15 words
A toluene-insoluble gel polymer of claim 1, wherein the crosslinking agent is ethylene glycol dimethacrylate.
Claim 4
Dependent Claim
15 words
A toluene-insoluble gel polymer of claim 1, wherein the crosslinking agent is trimethylene glycol dimethacrylate.
Claim 5
Dependent Claim
15 words
A toluene-insoluble gel polymer of claim 1, wherein the crosslinking agent is tetramethylene glycol dimethacrylate.
Claim 6
Dependent Claim
15 words
A toluene-insoluble gel polymer of claim 1, wherein the crosslinking agent is diethylene glycol dimethacrylate.
Claim 7
Dependent Claim
15 words
A toluene-insoluble gel polymer of claim 1, wherein the crosslinking agent is triethylene glycol dimethacrylate.
Claim 8
Dependent Claim
15 words
A toluene-insoluble gel polymer of claim 1, wherein the crosslinking agent is tetraethylene glycol dimethacrylate.
Claim 9
Dependent Claim
40 words
A toluene-insoluble gel polymer of claim 1, wherein the monomer copolymerizable with chloroprene is a monomer selected from the group consisting of styrene, vinyltoluene, butadiene, isoprene, 2,3-dichlorobutadiene-1,3, methyl vinyl ketone, methyl acrylate, ethyl acrylate, methyl methacrylate, ethyl methacrylate and acrylonitrile.
Claim 10
Dependent Claim
15 words
A toluene-insoluble gel polymer of claim 1, wherein the monomer copolymerizable with chloroprene is styrene.
Claim 11
Dependent Claim
15 words
A toluene-insuluble gel polymer of claim 1, wherein the monomer copolymerizable with chloroprene is 2,3-dichlorobutadiene-1,3.
Claim 12
Dependent Claim
90 words
A process for preparing a toluene-insoluble gel polymer comprising polymerizing chloroprene or a mixture of chloroprene with a small amount of at least one copolymerizable monomer in the presence of a cross-linking agent selected from the group consisting of a compound represented by the following formula: ##EQU9## wherein n is integer of from 1 to 8, ##EQU10## wherein n is integer of from 2 to 4, divinylbenzene and diallylphthalate to a crosslinking density of at least 2.4 × 10 - 6 and a monomer conversion of at least 80 percent.
Claim 13
Dependent Claim
90 words
A process for preparing a toluene-insoluble gel polymer comprising polymerizing chloroprene or a mixture of chloroprene with a small amount of at least one copolymerizable monomer in the presence of a cross-linking agent selected from the group consisting of a compound represented by the following formula: ##EQU9## wherein n is integer of from 1 to 8, ##EQU10## wherein n is integer of from 2 to 4, divinylbenzene and diallylphthalate to a crosslinking density of at least 2.4 × 10 - 6 and a monomer conversion of at least 80 percent.
Claim 14
Dependent Claim
13 words
A process of claim 11, wherein the crosslinking agent is ethylene glycol dimethacrylate.
Claim 15
Dependent Claim
13 words
A process of claim 11, wherein the crosslinking agent is trimethylene glycol dimethacrylate.
Claim 16
Dependent Claim
13 words
A process of claim 11, wherein the crosslinking agent is tetramethylene glycol dimethacrylate.
Claim 17
Dependent Claim
13 words
A process to claim 11, wherein the crosslinking agent is diethylene glycol dimethacrylate.
Claim 18
Dependent Claim
13 words
A process of claim 11, wherein the crosslinking agent is triethylene glycol dimethacrylate.
Claim 19
Dependent Claim
13 words
A process of claim 11, wherein the crosslinking agent is tetraethylene glycol dimethacrylate.
Claim 20
Dependent Claim
38 words
A process of claim 11, wherein the monomer copolymerizable with chloroprene is a monomer selected from the group consisting of styrene, vinyltoluene, butadiene, isoprene, 2,3-dichlorobutadiene-1,3, methyl vinyl ketone, methyl acrylate, ethyl acrylate, methyl methacrylate, ethyl methacrylate and acrylonitrile.
Claim 21
Dependent Claim
13 words
A process of claim 11, wherein the monomer copolymerizable with chloroprene is styrene.
Claim 22
Dependent Claim
13 words
A process of claim 11, wherein the monomer copolymerizable with chloroprene is 2,3-dichlorobutadiene-1,3.
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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |