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US3989660A
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Polymerization of vinyl halides
Assignee: European Vinyls Corp Technology AG
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Filing: 1975-04-07
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Granted: 1976-11-02
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Expires: 1995-04-07
Abstract
Abstract Aqueous microsuspension polymerization of vinyl halides in which monomer-soluble surfactant is dissolved in the monomer before it is brought into contact with the aqueous phase.
Inventors
- 👤 Peter John Goldsworthy
- 👤 Mark John Scudamore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:34
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; Y; Y10; Y10S; Y10S526/00; Y10S526/911
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
45 words
A process for polymerizing a vinyl halide-containing monomeric material which comprises first dissolving a monomer-soluble surfactant in said monomeric material, then bringing said solution into contact with an aqueous phase, homogenizing said mixture, and polymerizing said monomeric material in the presence of a monomer-soluble initiator.
Claim 2
Dependent Claim
45 words
A process for polymerizing a vinyl halide-containing monomeric material which comprises first dissolving a monomer-soluble surfactant in said monomeric material, then bringing said solution into contact with an aqueous phase, homogenizing said mixture, and polymerizing said monomeric material in the presence of a monomer-soluble initiator.
Claim 3
Dependent Claim
13 words
A process according to claim 1 wherein the vinyl halide is vinyl chloride.
Claim 4
Dependent Claim
26 words
A process according to claim 2 wherein the vinyl halide-containing monomeric material contains not more than 30% by weight of vinyl halide of a copolymerisable monomer.
Claim 5
Dependent Claim
17 words
A process according to claim 3 wherein the vinyl halide-containing monomeric material consists solely of vinyl chloride.
Claim 6
Dependent Claim
32 words
A process according to claim 1 wherein the monomer-soluble surfactant used is a salt of a sulphosuccinate ester, an ethoxylated long-chain alcohol, an ethoxylated carboxylic acid, or an ethoxylated substituted phenol surfactant.
Claim 7
Dependent Claim
47 words
A process according to claim 5 wherein the salt of the sulphosuccinate ester has the formula ##STR2## wherein R 1 is an alkali metal, an ammonium group or an alkyl group, R 2 is an alkyl group, and M is an alkali metal ion or ammonium ion.
Claim 8
Dependent Claim
24 words
A process according to claim 6 wherein R 1 , when it is an alkali metal, is sodium, and M is a sodium ion.
Claim 9
Dependent Claim
15 words
A process according to claim 7 wherein the monomer-soluble surfactant is sodium bis tridecyl sulphosuccinate.
Claim 10
Dependent Claim
29 words
A process according to claim 1 wherein the surfactant system also comprises a water-soluble surfactant dissolved in the aqueous phase before it is brought into contact with the monomer.
Claim 11
Dependent Claim
14 words
A process according to claim 9 wherein the water-soluble surfactant is sodium lauryl sulphate.
References Cited (Backward Citations)
GB978875A
Cited
GB1102980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |