Patent EP0110056A2 successfully refreshed from Google Patents.
Patent US4590236A successfully refreshed from Google Patents.
US4590236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of hydrophobicizing and oleophobicizing agents
Assignee: Bayer AG
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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 08:41
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.
References Cited (Backward Citations)
US3179534A
Cited
US3425863A
Cited
GB1123379A
Cited
US3520863A
Cited
US3407247A
Cited
US3501448A
Cited
US3403122A
Cited
FR2155133A5
Cited
US3870767A
Cited
FR2156786A1
Cited
US3919183A
Cited
FR2319668A1
Cited
US4312914A
Cited
US4508775A
Cited
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 |