US4020223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorination of polyolefin and polyacrylonitrile fibers
Assignee: Air Products and Chemicals Inc
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Filing: 1975-10-30
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Granted: 1977-04-26
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Expires: 1995-10-30
Abstract
Abstract The present invention relates to surface modification of synthetic resin fiber form materials, notably polyolefin and polyacrylonitrile fiber form materials whose surface has been modified by treatment with elemental fluorine, and to the fluorination process.
Inventors
- 👤 Dale D. Dixon
- 👤 Larry J. Hayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:48
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/07; D06M11/09; D06M11/11; D06M11/32; D06M11/34; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2973; Y10T428/2978; Y10T428/31504; Y10T428/3154; Y10T442/00; Y10T442/20; Y10T442/2279; Y10T442/2861; Y10T442/2885; Y10T442/291
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
87 words
An oil stain release moisture transporting fiber form comprising a synthetic resin selected from the group consisting of polyolefins and polyacrylonitriles, said fiber form being surface fluorinated from about [4 × 10.sup. -7 to 4 × 10.sup. -1 mg F/cm 2 ] 1 × 10.sup. -6 to 1 × 10.sup. -3 mg F/cm 2 on an after wash basis, said fluorinated fiber form exhibiting a neutralization equivalent of below about [1 × 10 6 ] 2 × 10 5 and an F/COOH ratio no greater than 25.
Claim 2
Dependent Claim
87 words
An oil stain release moisture transporting fiber form comprising a synthetic resin selected from the group consisting of polyolefins and polyacrylonitriles, said fiber form being surface fluorinated from about [4 × 10.sup. -7 to 4 × 10.sup. -1 mg F/cm 2 ] 1 × 10.sup. -6 to 1 × 10.sup. -3 mg F/cm 2 on an after wash basis, said fluorinated fiber form exhibiting a neutralization equivalent of below about [1 × 10 6 ] 2 × 10 5 and an F/COOH ratio no greater than 25.
Claim 3
Dependent Claim
22 words
The fluorinated fiber form of claim 1 wherein the resin is a polyolefin selected from the group consisting of polyethylene and polypropylene.
Claim 4
Dependent Claim
13 words
The fluorinated fiber form of claim 1 wherein the resin is a polyacrylonitrile.
Claim 5
Dependent Claim
13 words
The fluorinated fiber form of claim 1 wherein the fiber form is fabric.
Claim 6
Independent Claim
86 words
A method for surface treating an unfluorinated fiber form comprising a synthetic resin selected from the group consisting of polyacrylonitriles and polyolefins which consists essentially of contacting the fiber form for less than 15 minutes with a fluorine containing gas having from about 0.2-1% by volume of elemental oxygen, and from about 0.5-5% by volume of elemental fluorine to a combined fluorine level in said fiber form of from 1 × 10.sup. -6 to 1 × 10.sup. -3 mg F/cm 2 on an after wash basis.
Claim 7
Independent Claim
86 words
A method for surface treating an unfluorinated fiber form comprising a synthetic resin selected from the group consisting of polyacrylonitriles and polyolefins which consists essentially of contacting the fiber form for less than 15 minutes with a fluorine containing gas having from about 0.2-1% by volume of elemental oxygen, and from about 0.5-5% by volume of elemental fluorine to a combined fluorine level in said fiber form of from 1 × 10.sup. -6 to 1 × 10.sup. -3 mg F/cm 2 on an after wash basis.
Claim 8
Dependent Claim
20 words
The method of claim 5 wherein the fluorine containing gas has less than a 1:5 O 2 /F 2 ratio.
Claim 9
Dependent Claim
19 words
The method of claim 5 wherein the fluorine containing gas has less than about 5% by volume of fluorine.
Claim 10
Dependent Claim
14 words
The method of claim 6 wherein the treatment time is less than 5 minutes.
Claim 11
Dependent Claim
13 words
The method of claim 6 wherein the fiber form treated is a fabric.
Claim 12
Dependent Claim
15 words
The method of claim 6 wherein the fiber form fluorinated is an already dyed fabric.
Claim 13
Dependent Claim
18 words
The method of claim 5 wherein the fluorination gas/fiber form contact time is less than about 10 minutes.
Claim 14
Dependent Claim
18 words
The method of claim 5 wherein the fluorination gas/fiber form contact time is less than about 1 minute.
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) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |