US3684778A
Expired / Lapsed
US
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Polymers of ethylene, sulfur dioxide and ethylenic monomers
Assignee: EIDP Inc
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Filing: 1970-04-28
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Granted: 1972-08-15
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Expires: 1990-04-28
Abstract
Abstract Essentially random copolymers of ethylene, sulfur dioxide and at least one copolymerizable ethylenically unsaturated organic compound such as vinyl acetate or methyl methacrylate which are essentially free of 1:1 molar ratio of ethylene and sulfur dioxide are provided. Processes for preparing these copolymers are also provided. These copolymers consist essentially of at least about 25 percent by weight ethylene, from about 0.1 to 30 percent by weight of sulfur dioxide and from about 0.1 to 55 percent by weight of at least one of the copolymerizable organic compounds. By varying the amount of the highly polar sulfur dioxide in the copolymer, materials which are blendable with another solid organic polymer such as a vinyl chloride polymer and which possess improved properties such as oil and solvent resistance can be obtained. By varying the amount of the polar copolymer in the blend, shaped articles which are flexible or rigid can be obtained.
Inventors
- 👤 Clarence Frederick Hammer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:39
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/20; C08G75/205; C08G75/22; B; B32; B32B; B32B7/00; B32B7/04; B32B7/12; B32B15/00; B32B15/04; B32B15/043; B32B15/20; C08L; C08L81/00; C08L81/06; B32B2311/00; B32B2311/24
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
87 words
The polymer of claim 1 wherein the copolymerizable, ethylenically unsaturated organic compound is selected from the group consisting of unsaturated mono- or dicarboxylic acids, esters of unsaturated mono- or dicarboxylic acids, vinyl esters of saturated carboxylic acids wherein the acid group has one to 18 carbon atoms, vinyl alcohol, vinyl halides, vinyl alkyl ethers, vinylidene halides, acrylonitrile, methacrylonitrile, alpha olefins of three to 12 carbon atoms, vinyl aromatics, hydroxy or epoxy substituted esters of unsaturated mono- or dicarboxylic acids and hydroxy or epoxy substituted vinyl alkyl ethers.
Claim 2
Dependent Claim
19 words
The polymer of claim 2 wherein the polymer contains from about 15 to 30 percent by weight sulfur dioxide.
Claim 3
Dependent Claim
19 words
The polymer of claim 2 wherein the polymer contains from about 0.1 to 15 percent by weight sulfur dioxide.
Claim 4
Dependent Claim
42 words
The polymer of claim 3 wherein the copolymerizable, ethylenically unsaturated organic compound is vinyl acetate, alkyl acrylate wherein the alkyl group is from one to 18 carbon atoms or alkyl methacrylate wherein the alkyl group is from one to 18 carbon atoms.
Claim 5
Dependent Claim
42 words
The polymer of claim 4 wherein the copolymerizable, ethylenically unsaturated organic compound is vinyl acetate, alkyl acrylate wherein the alkyl group is from one to 18 carbon atoms or alkyl methacrylate wherein the alkyl group is from one to 18 carbon atoms.
Claim 6
Dependent Claim
36 words
The polymer of claim 4 wherein said polymer is at least about 50 percent by weight ethylene, about 0.1 to 45 percent by weight vinyl acetate and about 0.1 to 15 percent by weight sulfur dioxide.
Claim 7
Dependent Claim
49 words
The polymer of claim 4 wherein said polymer is at least about 50 percent by weight ethylene, about 0.1 to 35 percent by weight alkyl acrylate or methacrylate wherein the alkyl group is from one to 18 carbon atoms and about 0.1 to 15 percent by weight sulfur dioxide.
Claim 8
Dependent Claim
13 words
The ethylene copolymer of claim 1 in the form of a shaped article.
Claim 9
Dependent Claim
13 words
The ethylene copolymer of claim 3 in the form of a shaped article.
Claim 10
Dependent Claim
13 words
The ethylene copolymer of claim 4 in the form of a shaped article.
Claim 11
Dependent Claim
147 words
A process for preparing an ethylene copolymer comprising: (1) continuously reacting ethylene, sulfur dioxide and at least one copolymerizable, ethylenically unsaturated organic compound having only one copolymerizable double bond in proportions to provide an essentially random copolymer consisting essentially of at least about 25 percent by weight ethylene, from about 0.1 to 30 percent by weight sulfur dioxide and from about 0.1 to 55 percent by weight of at least one of said copolymerizable organic compounds, in a pressurized, stirred reaction zone maintained at a temperature of at least 140*C., with a free-radical catalyst wherein the contents throughout the reaction zone are kept uniform with respect to the molar ratio of ethylene, sulfur dioxide and said copolymerizable organic compound, (2) continuously separating the copolymer from unreacted ethylene, sulfur dioxide and said copolymerizable organic compound, and (3) continuously discharging said unreacted ethylene, sulfur dioxide and copolymerizable organic compound.
Claim 12
Dependent Claim
41 words
The process of claim 12 wherein the pressure is within the range of about 5,000 to 60,000 psi, the temperature is within the range of about 155* to 300*C. and the free-radical catalyst is an azo catalyst or a perester catalyst.
Claim 13
Dependent Claim
87 words
The process of claim 13 wherein the copolymerizable, ethylenically unsaturated organic compound is selected from the group consisting of unsaturated mono- or dicarboxylic acids, esters of unsaturated mono- or dicarboxylic acids, vinyl esters of saturated carboxylic acids wherein the acid group has one to 18 carbon atoms, vinyl alcohol, vinyl halides, vinyl alkyl ethers, vinylidene halides, acrylonitrile, methacrylonitrile, alpha olefins of three to 12 carbon atoms, vinyl aromatics, hydroxy or epoxy substituted esters of unsaturated mono- or dicarboxylic acids and hydroxy or epoxy substituted vinyl alkyl ethers.
Claim 14
Dependent Claim
42 words
The process of claim 14 wherein the copolymerizable, ethylenically unsaturated organic compound is vinyl acetate, alkyl acrylate wherein the alkyl group is from one to 18 carbon atoms or alkyl methacrylate wherein the alkyl group is from one to 18 carbon atoms.
Claim 15
Dependent Claim
50 words
The process of claim 15 wherein the sulfur dioxide is continuously mixed with the copolymerizable organic compound and the mixture continuously fed to said stirred reactor maintained at a pressure within the range of about 20,000 to 35,000 psi and a temperature within the range of about 155* to 225*C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |