Patent US3975338A successfully refreshed from Google Patents.
US3975338A
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Process of producing vinyl chloride polymers
Assignee: Kanegafuchi Chemical Industry Co Ltd
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Filing: 1973-12-21
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Granted: 1976-08-17
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Expires: 1993-12-21
Abstract
Abstract A vinyl chloride polymer for providing a vinyl chloride paste which has a good thermal stability, a stability to sol viscosity and an excellent air release capability in the natural state or in a short period of time under a moderately low pressure is produced by using, in the production thereof, as an emulsifying agent, the alkali metal salts and/or ammonium salts of a mixture of a major amount of olefin alkyl sulfonates and a minor amount of hydroxyalkyl sulfonates (hereinafter olefin alkyl/hydroxyalkyl sulfonates) having from about 8 to 20 carbon atoms, in the polymerization thereof or in the preparation of a vinyl chloride paste from the polymerized product.
Inventors
- 👤 Katsuya Tsubota
- 👤 Shigeru Motani
- 👤 Tatsuo Hasue
- 👤 Yasuhiro Nijima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:00
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
141 words
In a method of producing a polyvinyl chloride paste resin which has improved thermal stability, improved stability to sol viscosity and good free and forced air release capability, wherein the polyvinyl chloride paste resin is produced by the polymerization of vinyl chloride, the improvement wherein the polymerization is conducted in the presence of an emulsifying agent which contains as a major component (1) components selected from the group consisting of alkali metal salts and ammonium salts of an olefin alkyl sulfonate and mixtures thereof, and as a minor component (2) a minor amount of a hydroxyalkyl sulfonate; both components (1) and (2) having from about 12 to 18 carbon atoms in the alkyl moiety; said emulsifying agent being produced by sulfonating an α-olefin having 12 to 18 carbon atoms, and then hydrolyzing the sulfonated product in the presence of an alkali.
Claim 2
Dependent Claim
141 words
In a method of producing a polyvinyl chloride paste resin which has improved thermal stability, improved stability to sol viscosity and good free and forced air release capability, wherein the polyvinyl chloride paste resin is produced by the polymerization of vinyl chloride, the improvement wherein the polymerization is conducted in the presence of an emulsifying agent which contains as a major component (1) components selected from the group consisting of alkali metal salts and ammonium salts of an olefin alkyl sulfonate and mixtures thereof, and as a minor component (2) a minor amount of a hydroxyalkyl sulfonate; both components (1) and (2) having from about 12 to 18 carbon atoms in the alkyl moiety; said emulsifying agent being produced by sulfonating an α-olefin having 12 to 18 carbon atoms, and then hydrolyzing the sulfonated product in the presence of an alkali.
Claim 3
Dependent Claim
18 words
The process as claimed in claim 1, wherein said alkyl moiety has about 12 to 16 carbon atoms.
Claim 4
Dependent Claim
32 words
The process of claim 1, wherein 100 parts by weight of said polyvinyl chloride paste resin is combined with 30 to 150 parts by weight of a plasticizer to form a plastisol.
Claim 5
Dependent Claim
15 words
The process of claim 1, wherein said polymerization is conducted with vinyl chloride monomer only.
Claim 6
Dependent Claim
39 words
The process of claim 1, wherein said polymerization is conducted with at least 50% by weight vinyl chloride monomer, the balance consisting of monomers selected from the group of vinyl acetate, vinylidene chloride, acrylonitrile, acrylic esters and maleic acid.
Claim 7
Dependent Claim
20 words
The process as claimed in claim 1, wherein the emulsion polymerization is a catalytic copolymerization using a water soluble catalyst.
Claim 8
Dependent Claim
27 words
The process as claimed in claim 1, wherein said emulsifying agent is used in an amount of from 0.05 to 5.0% by weight of the monomers polymerized.
Claim 9
Dependent Claim
89 words
The process as claimed in claim 1, wherein said emulsifying agent is employed in combination with conventional emulsifying agents selected from the group of alkali metal salts of higher alcohol sulfonic acid esters, ammonium salts of higher sulfonic acid esters, alkyl benzene sulfonate, dialkyl sulfosuccinate, polyoxyethylene alkyl ether, polyoxyethylene-polyoxypropylene block copolymer, sorbitan ester, and glycerine alkyl ester; said mixture of said olefin alkyl sulfonate and said hydroxyalkyl sulfonate being used in an amount of at least 50% by weight of the total weight of the combination of emulsifying agents.
Claim 10
Dependent Claim
16 words
The process as claimed in claim 1 wherein the emulsion polymerization is a seeded emulsion polymerization.
Claim 11
Dependent Claim
20 words
The process as claimed in claim 1 wherein the emulsion polymerization is a catalytic polymerization using an oil soluble catalyst.
Claim 12
Dependent Claim
149 words
In a method of producing a polyvinyl chloride past resin which has improved thermal stability, improved stability to sol viscosity and good free and forced air release capability, wherein the polyvinyl chloride paste resin is produced by the polymerization of vinyl chloride, the improvement wherein the preparation of the polyvinyl chloride paste resin includes the adding to a polyvinyl chloride latex an emulsifying agent which contains as a major component (1) components selected from the group consisting of alkali metal salts and ammonium salts of an olefin alkyl sulfonate and mixtures thereof, and as a minor component (2) a minor amount of a hydroxyalkyl sulfonate; both components (1) and (2) having from about 12 to 18 carbon atoms in the alkyl moiety; said emulsifying agent being produced by sulfonating an α-olefin having 12 to 18 carbon atoms, and then hydrolyzing the sulfonated product in the presence of an alkali.
Claim 13
Dependent Claim
149 words
In a method of producing a polyvinyl chloride past resin which has improved thermal stability, improved stability to sol viscosity and good free and forced air release capability, wherein the polyvinyl chloride paste resin is produced by the polymerization of vinyl chloride, the improvement wherein the preparation of the polyvinyl chloride paste resin includes the adding to a polyvinyl chloride latex an emulsifying agent which contains as a major component (1) components selected from the group consisting of alkali metal salts and ammonium salts of an olefin alkyl sulfonate and mixtures thereof, and as a minor component (2) a minor amount of a hydroxyalkyl sulfonate; both components (1) and (2) having from about 12 to 18 carbon atoms in the alkyl moiety; said emulsifying agent being produced by sulfonating an α-olefin having 12 to 18 carbon atoms, and then hydrolyzing the sulfonated product in the presence of an alkali.
Claim 14
Dependent Claim
30 words
The process as claimed in claim 11, wherein said emulsifying agent is used in an amount of from 0.001 to 1.0% weight of the polymer latex resulting from the polymerization.
References Cited (Backward Citations)
US3546193A
Cited
US3332875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |