US4590236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of hydrophobicizing and oleophobicizing agents
Assignee: Bayer AG
•
Filing: 1985-02-19
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Granted: 1986-05-20
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Expires: 2005-02-19
Abstract
Abstract The present invention relates to a process for the production of emulsions containing graft copolymers of ethylenically unsaturated perfluoroalkyl monomers on acrylate dispersions and to the use thereof as hydrophobicizing and oleophobicizing agents.
Inventors
- 👤 Joachim Konig
- 👤 Carlhans Suling
- 👤 Christian Lindner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:33
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M15/277; C; C08; C08F; C08F265/00; C08F265/04; D06M2200/00; D06M2200/10; D06M2200/11; D06M2200/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
65 words
A process for the production of an aqueous dispersion of a graft copolymer comprising, graft polymerizing graft monomers, comprising ethylenically-unsaturated perfluoroalkyl monomers having saturated perfluorinated aliphatic alkyl groups containing at least four perflorinated carbon atoms, onto an aqueous acrylate dispersion graft base, in the presence of a water-insoluble solvent capable of dissolving the graft monomers and of initiators which are soluble in the water-insoluble solvent.
Claim 2
Dependent Claim
65 words
A process for the production of an aqueous dispersion of a graft copolymer comprising, graft polymerizing graft monomers, comprising ethylenically-unsaturated perfluoroalkyl monomers having saturated perfluorinated aliphatic alkyl groups containing at least four perflorinated carbon atoms, onto an aqueous acrylate dispersion graft base, in the presence of a water-insoluble solvent capable of dissolving the graft monomers and of initiators which are soluble in the water-insoluble solvent.
Claim 3
Dependent Claim
22 words
A process according to claim 1 further comprising graft polymerizing in the presence of a graft activator having a high transfer activity.
Claim 4
Dependent Claim
29 words
A process according to claim 1 further comprising, the graft monomers are an admixture of the ethylenically-unsaturated perfluoroalkyl monomers and ethylenically-unsaturated monomers which are free from perflourinated carbon atoms.
Claim 5
Dependent Claim
13 words
An aqueous dispersion of a graft copolymer producted in accordance with claim 1.
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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) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |