Patent US4064080A successfully refreshed from Google Patents.
US4064080A
Expired / Lapsed
US
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Latex of styrene polymers with terminal amino-sulfonated groups and method of making
Assignee: Rhone Poulenc Industries SA
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Filing: 1976-08-09
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Granted: 1977-12-20
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Expires: 1996-08-09
Abstract
Abstract A dispersion of particles having an average diameter within the range of 0.05 to 3 mu m formed of a homo- or copolymer of styrene having terminal <IMAGE> groups and a glass transition temperature above 20 DEG C, and the use of such latex for fixing proteins.
Inventors
- 👤 Jean-Claude Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:07
CPC Classifications
C; C08; C08F; C08F12/00; C08F12/02; C08F12/04; C08F12/06; C08F12/08
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
35 words
Styrene polymers having terminal ##STR6## groups in the form of stable latices, the polymer particles of which have an average diameter of between 0.05 and 3 μm and a glass transition temperature above 20° C.
Claim 2
Dependent Claim
35 words
Styrene polymers having terminal ##STR6## groups in the form of stable latices, the polymer particles of which have an average diameter of between 0.05 and 3 μm and a glass transition temperature above 20° C.
Claim 3
Dependent Claim
13 words
Polymers as claimed in claim 1 comprising homopolymers of styrene or its derivatives.
Claim 4
Dependent Claim
16 words
Polymers as claimed in claim 1 comprising copolymers of styrene or its derivatives with vinyl monomers.
Claim 5
Dependent Claim
16 words
Polymers as claimed in claim 1 comprising copolymers of styrene or its derivatives with diene monomers.
Claim 6
Independent Claim
94 words
A method of preparing latices of polymers having terminal ##STR7## groups, in the form of stable latices, the polymer particles of which have an average diameter of between 0.05 and 3 μm and a glass transition temperature above 20° C, comprising polymerizing a styrene compound, alone or in admixture, with a copolymerizable vinyl monomer in an aqueous emulsion in the presence of 0.1 to 10% by weight of a chain transfer agent, selected from the group consisting of aminophenyl disulphide and aminophenyl mercaptan at least one emulsifying agent, and a water soluble diazo initiator.
Claim 7
Independent Claim
94 words
A method of preparing latices of polymers having terminal ##STR7## groups, in the form of stable latices, the polymer particles of which have an average diameter of between 0.05 and 3 μm and a glass transition temperature above 20° C, comprising polymerizing a styrene compound, alone or in admixture, with a copolymerizable vinyl monomer in an aqueous emulsion in the presence of 0.1 to 10% by weight of a chain transfer agent, selected from the group consisting of aminophenyl disulphide and aminophenyl mercaptan at least one emulsifying agent, and a water soluble diazo initiator.
Claim 8
Dependent Claim
25 words
The method as claimed in claim 5, in which the copolymerizable vinyl monomer is replaced in whole or in part with a copolymerizable diene monomer.
Claim 9
Dependent Claim
23 words
A method as claimed in claim 6 in which the diene monomer is selected from the group consisting of butadiene and its derivatives.
Claim 10
Dependent Claim
27 words
A method as claimed in claim 5 in which the styrene compound is selected from the group consisting of styrene, methyl styrene, vinyl toluene and ethyl styrene.
Claim 11
Dependent Claim
38 words
A method as claimed in claim 5 in which the vinyl monomer is selected from the group consisting of acrylonitrile, methacrylonitrile, alkyl acrylates and alkyl methacrylates in which the alkyl group contains from 1 to 10 carbon atoms.
Claim 12
Dependent Claim
22 words
A method as claimed in claim 8 in which the vinyl monomer is present in an amount up to 90% by weight.
Claim 13
Dependent Claim
22 words
A method as claimed in claim 9 in which the diene monomer is present in an amount up to 90% by weight.
Claim 14
Dependent Claim
49 words
A method as claimed in claim 5 in which the emulsifying agent is selected from the group consisting of an anionic agent, a cationic agent and a non-ionic agent and is present in an amount within the range of 0.05 to 10% by weight of the monomer or monomers.
Claim 15
Dependent Claim
48 words
A method as claimed in claim 5 in which the water soluble diazo initiator is selected from the group consisting of sulfonated azo-nitrile carboxylated azonitrile, an azo-bis-alkylamidinium salt and is present in an amount within the range of 0.01 to 3% by weight of the monomer or monomers.
Claim 16
Dependent Claim
29 words
A method as claimed in claim 5 in which the concentration of monomer or monomers in the reaction media is within the range of 1 to 70% by weight.
Claim 17
Dependent Claim
19 words
A method as claimed in claim 5 in which the polymerization temperature is within the range of 20°-100° C.
Claim 18
Dependent Claim
13 words
Proteins fixed on the latex formed of the polymer particles of claim 1.
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) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |