Patent US3617355A successfully refreshed from Google Patents.
US3617355A
Expired / Lapsed
US
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Method of applying water and oil repellent finish for synthetic fibrous materials
Assignee: Hoechst AG
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Filing: 1969-12-30
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Granted: 1971-11-02
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Expires: 1989-12-30
Abstract
Abstract Process for rendering foils and fibrous materials water and oil repellent by grafting onto these substrates a perfluoro n-alkylvinyl ether under simultaneous use of trifluoroacetic acid and/or methylene chloride under the action of a grafting initiator.
Inventors
- 👤 Wilhelm Loffler
- 👤 Martin Rieber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:08
CPC Classifications
D; D06; D06M; D06M14/00; D06M14/18; D06M14/26
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
33 words
A process as claimed in claim 1, wherein as perfluoro n-alkyl-vinyl ether a compound of the general formula F3C-(CF2) x-0-CH CH2 in which x represents an integer from 2 to 8 is used.
Claim 2
Dependent Claim
33 words
A process as claimed in claim 1, wherein the perfluoro n-alkyl-vinyl ether and the auxiliary agents trifluoroacetic acid and/or methylene chloride are used in a ratio of 1:30 to 15:1 parts by weight.
Claim 3
Dependent Claim
47 words
A process as claimed in claim 1, wherein the perfluoro n-alkyl-vinyl ether and the auxiliary agents trifluoroacetic acid and/or methylene chloride are applied onto the goods to be provided with the finish in the form of a solution in an organic solvent or of an aqueous emulsion.
Claim 4
Dependent Claim
34 words
A process as claimed in claim 1, wherein the perfluoro n-alkyl-vinyl ether is applied in quantities of about 0.5 to 10%, referred to the weight of the goods to be provided with the finish.
Claim 5
Dependent Claim
33 words
A process as claimed in claim 1, wherein the goods treated with the perfluoro n-alkyl-vinyl ether and the auxiliary agents trifluoroacetic acid and/or methylene chloride are heated to about 30 to 140* C.
Claim 6
Dependent Claim
47 words
A process as claimed in claim 1, wherein the action of the ionizing rays on the goods to be provided with the finish is carried through either before, during or after application of the perfluoro n-alkyl-vinyl ether and of the auxiliary agents trifluoroacetic acid and/or methylene chloride.
Claim 7
Dependent Claim
45 words
A process as claimed in claim 1, wherein ozone is applied as grafting initiator either before or during application of the perfluoro n-alkyl-vinyl ether and of the auxiliary agents trifluoroacetic acid and/or methylene chloride onto the goods ether and of be provided with a finish.
References Cited (Backward Citations)
US3382222A
Cited
US3465045A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |