US4445959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of synthetic rubber latices, their use as a starting material in the production of pressure-sensitive adhesives and pressure-sensitive adhesives
Assignee: Bayer AG
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Filing: 1982-05-14
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Granted: 1984-05-01
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Expires: 2002-05-14
Abstract
Abstract A process for the production of synthetic rubber latices by the emulsion polymerization of a monomer mixture of: 40 to 80 parts by weight of a conjugated diene; 0 to 45 parts by weight of an aromatic vinyl compound; 0 to 30 parts by weight of (meth)acrylonitrile 0 to 30 parts by weight of a (meth)acrylic acid ester containing from 1 to 12 carbon atoms in the alcohol component or other copolymerizable compounds, and 0.5 to 5.0 parts by weight of an α, β-unsaturated mopnocarboxylic or dicarboxylic acid, the sum of the monomer compounds amounting to 100 parts by weight, characterized in that from 0.5 to 2.0 parts by weight of a chain transfer agent are used per 100 parts by weight of monomer. Said latices can be used for producing pressure-sensitive adhesives.
Inventors
- 👤 Rudolf Hombach
- 👤 Wilfried Nolte
- 👤 Peter J. Russell
- 👤 Nigel G. Wall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:37
CPC Classifications
C; C09; C09J; C09J113/00; C09J113/02; C08; C08F; C08F236/00; C08F236/02; C08F236/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
155 words
In the process of bonding a surface of one substrate to a surface of another substrate by applying a pressure-sensitive adhesive to at least one of said surfaces and then bringing said surfaces together in contact with each other under pressure, the improvement wherein said adhesive comprises a latex produced by emulsion polymerization of a monomer mixture containing 40to 80 parts by weight of conjugated diene; 0 to 45 parts by weight of an aromatic vinyl compound; 0 to 30 parts by weight of (meth)acrylonitrile; 5 to 30 parts by weight of an acrylic acid ester containing from 4 to 8 carbon atoms in the alcohol component and 0.5 to 5.0 parts by weight of an α,β-unsaturated monocarboxylic or dicarboxylic acid, the sum of the monomer components amounting to 100 parts by weight and from 0.5 to 2.0 parts by weight of a chain transfer agent being used per 100 parts by weight of monomer.
Claim 2
Dependent Claim
155 words
In the process of bonding a surface of one substrate to a surface of another substrate by applying a pressure-sensitive adhesive to at least one of said surfaces and then bringing said surfaces together in contact with each other under pressure, the improvement wherein said adhesive comprises a latex produced by emulsion polymerization of a monomer mixture containing 40to 80 parts by weight of conjugated diene; 0 to 45 parts by weight of an aromatic vinyl compound; 0 to 30 parts by weight of (meth)acrylonitrile; 5 to 30 parts by weight of an acrylic acid ester containing from 4 to 8 carbon atoms in the alcohol component and 0.5 to 5.0 parts by weight of an α,β-unsaturated monocarboxylic or dicarboxylic acid, the sum of the monomer components amounting to 100 parts by weight and from 0.5 to 2.0 parts by weight of a chain transfer agent being used per 100 parts by weight of monomer.
Claim 3
Dependent Claim
62 words
The process of claim 1 wherein a monomer mixture containing 40 to 80 parts by weight of butadiene, 10 to 45 parts by weight of styrene, 5 to 30 parts by weight of an acrylic acid ester containing from 4 to 8 carbon atoms in the alcohol component and 0.5 to 5.0 parts by weight of an α,β-unsaturated monocarboxylic acid is used.
Claim 4
Dependent Claim
30 words
The process of claim 1 or 2 wherein a mercapto compound, a dialkyl xanthogen disulphide, an organic halogen compound or a mixture thereof is used as the chain transfer agent.
Claim 5
Dependent Claim
18 words
The process of claim 1 or 2 wherein a mercapto compound is used as the chain transfer agent.
Claim 6
Dependent Claim
23 words
The process of claim 1 wherein an alkyl mertaptan containing from 4 to 20 carbon atoms is used as the chain transfer agent.
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) | 1987-05-01 | 1987-10-31 | 1988-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-01 | 1991-10-31 | 1992-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-01 | 1995-10-31 | 1996-05-01 | $7700.00 | Window Closed / Lapsed |