Patent US3847657A successfully refreshed from Google Patents.
US3847657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophobic and oleophobic finish
Assignee: Hoechst AG
•
Filing: 1972-10-17
•
Granted: 1974-11-12
•
Expires: 1992-10-17
Abstract
Abstract Polyester materials are rendered hydrophobic and oleophobic by contacting said material with fluoroalkyl-acrylates or methacrylates and by effecting polymerization, graftpolymerization or both of these reactions in the presence of tetrachlorethane.
Inventors
- 👤 M Rieber
- 👤 W Loffler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:30
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M15/277; D06M14/00; D06M14/08; D06M14/12; D06M14/14; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/2971
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
63 words
A PROCESS FOR RENDERING POLYESTER MATERIALS FOR FIBERS AND FOILS WATER- AND OIL REPELLANT WHICH COMPRISES CONTACTING SAID MATERIAL WITH A MIXTURE OF A FLUOROALKYL ACRYLATE OR METHACRYLATE AND TETACHLORETHANE AND EFFECTING A GRAFT POLYMERIZATION OR POLYMERIZATION OR BOTH OF THESE REACTIONS BY ADDITION OF AN EFFECTIVE AMOUNT OF A FREE RADICAL GENERATING CATALYST, WHEREIN SAID FLUORALKYL ACRYLATE OR METHYACRYLATE HAS THE FORMULA
Claim 2
Dependent Claim
63 words
A PROCESS FOR RENDERING POLYESTER MATERIALS FOR FIBERS AND FOILS WATER- AND OIL REPELLANT WHICH COMPRISES CONTACTING SAID MATERIAL WITH A MIXTURE OF A FLUOROALKYL ACRYLATE OR METHACRYLATE AND TETACHLORETHANE AND EFFECTING A GRAFT POLYMERIZATION OR POLYMERIZATION OR BOTH OF THESE REACTIONS BY ADDITION OF AN EFFECTIVE AMOUNT OF A FREE RADICAL GENERATING CATALYST, WHEREIN SAID FLUORALKYL ACRYLATE OR METHYACRYLATE HAS THE FORMULA
Claim 3
Dependent Claim
15 words
A process as claimed in claim 1, wherein the polyester material consists essentially of poly-ethyleneglycolterephthalate.
Claim 4
Dependent Claim
16 words
A process as claimed in claim 1, wherein the fluoroalkyl acrylate or methacrylate has the formula
Claim 5
Dependent Claim
22 words
A process as claimed in claim 1, wherein x is a number of 5 to 9 and y is 1 or 2.
Claim 6
Dependent Claim
24 words
A process as claimed in claim 1, wherein the ratio of fluoroalkyl compound and tetrachloroethane is about 1:30 to about 15:1 parts by weight.
Claim 7
Dependent Claim
16 words
A process as claimed in claim 5, wherein the ratio is about 1:5 to about 5:1.
Claim 8
Dependent Claim
13 words
A process as claimed in claim 1, wherein the catalyst is a peroxide.
Claim 9
Dependent Claim
14 words
A process as claimed in claim 7, wherein the peroxide is an organic peroxide.
Claim 10
Dependent Claim
29 words
A process as claimed in claim 8, wherein the peroxide is dibenzoyl peroxide, di-tertiary-butyl peroxide, di-acetyl peroxide, peracetic acid and its salts, perbenzoic acid and its salts, or azo-diisobutyronitrile.
Claim 11
Dependent Claim
14 words
A process as claimed in claim 7, wherein the peroxide is an inorganic peroxide.
Claim 12
Dependent Claim
31 words
A process as claimed in claim 10, wherein the peroxide is hydrogen peroxide, persulfuric acid and its salts, perboric acid and its salts or a lower aliphatic ester of percarbonic acid.
Claim 13
Dependent Claim
24 words
A process as claimed in claim 1, wherein the catalyst is contacted with the polyester material before contacting the material with the fluoroalkyl compound.
Claim 14
Dependent Claim
25 words
A process as claimed in claim 1, wherein the tetrachloroethane is contacted with the polyester material before the material is contacted with the fluoroalkyl compound.
Claim 15
Dependent Claim
31 words
A process as claimed in claim 1, wherein a mixture of fluoroalkyl compound, tetrachloroethane and catalyst having a temperature of about 40* to 80* C is added to the polyester material.
Claim 16
Dependent Claim
35 words
A process as claimed in claim 1, wherein the polyester material is conducted continuously through a mixture of the fluoroalkyl compound, tetrachloroethane and the catalyst which mixture has a temperature of about 40* to 80*C.
Claim 17
Dependent Claim
17 words
A process as claimed in claim 1, wherein the amount is about 0.2 to about 2 percent.
Claim 18
Dependent Claim
33 words
A process as claimed in claim 1, wherein the polyester which has been treated with the fluoroalkyl compound, tetrachloroethane and the catalyst is heated to a temperature of about 80* to about 220*C.
Claim 19
Dependent Claim
53 words
A process as claimed in claim 1, wherein the polyester is impregnated with the mixture of fluoroalkyl compound, tetrachloroethane and catalyst and cured in a two-step heat treatment consisting of a first step of a temperature of about 80* to 140*C and a second step of a temperature of about 150* to 220*C.
Claim 20
Dependent Claim
28 words
A process as claimed in claim 18, wherein the temperature is in the first step between 100* and 130*C and in the second step between 160* and 180*C.
References Cited (Backward Citations)
US2642416A
Cited
US3034925A
Cited
US3274294A
Cited
US3479214A
Cited
US3464947A
Cited
US3412175A
Cited
US3592686A
Cited
US3617355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |