US4448839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sizing hydrophobic yarn
Assignee: Rohm and Haas Co
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Filing: 1981-10-20
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Granted: 1984-05-15
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Expires: 2001-10-20
Abstract
Abstract A method of sizing a hydrophobic yarn for weaving comprising the steps of applying thereto an acid pH latex of a free radical initiated vinyl polymer and drying the yarn. The polymer has a weight average molecular weight of from about 300,000 to about 2,500,000, and in dried film form is hydrophobic, not redispersible in a solution at a low pH and redispersible in an alkaline aqueous medium. The polymer is prepared from monomers comprising about 8% to about 14%, by weight ethylenically unsaturated acid. The average solubility parameter of the monomers in the polymer is between about 9.0 and about 9.5; the calculated polymer T g is between about -20° C. and 20° C. Preferred yarns are nylon and polyester.
Inventors
- 👤 Hal C. Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:53
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2402
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
106 words
A method of sizing a hydrophobic yarn for weaving comprising the steps of ( 1) applying thereto an acid pH latex of a free radical initiated vinyl polymer having a weight average molecular weight of from about 300,000 to about 2,500,000; said polymer, in dried film form, being hydrophobic and not redispersible in a solution at a low pH and being redispersible in an alkaline aqueous medium; said polymer being of monomers having a solubility parameter from about 9.0 to about 9.5, a T g from about -20° C. and comprising 8% to about 14%, by weight, alpha, beta-ethylenically unsaturated acid, and (2) drying the yarn.
Claim 2
Independent Claim
106 words
A method of sizing a hydrophobic yarn for weaving comprising the steps of ( 1) applying thereto an acid pH latex of a free radical initiated vinyl polymer having a weight average molecular weight of from about 300,000 to about 2,500,000; said polymer, in dried film form, being hydrophobic and not redispersible in a solution at a low pH and being redispersible in an alkaline aqueous medium; said polymer being of monomers having a solubility parameter from about 9.0 to about 9.5, a T g from about -20° C. and comprising 8% to about 14%, by weight, alpha, beta-ethylenically unsaturated acid, and (2) drying the yarn.
Claim 3
Dependent Claim
49 words
The method of claim 1, the yarn being of polyester or nylon, the polymer being of monomers selected from butyl acrylate, from styrene, acrylic acid, methacrylic acid, ethyl acrylate, 2 ethyl hexylacrylate, propyl acrylate and methyl acrylate, vinyl toluene, α-methyl styrene, acrylonitrile, ethyl meth-acrylate, butyl methacrylate and propyl methacrylate.
Claim 4
Dependent Claim
22 words
The method of claim 2 in which said monomers consist essentially of butyl acrylate, methyl methacrylate, styrene, acrylic acid and methacrylic acid.
Claim 5
Dependent Claim
11 words
The method of claim 3 in which said yarn is polyester.
Claim 6
Dependent Claim
11 words
The method of claim 3 in which said yarn is nylon.
Claim 7
Dependent Claim
27 words
The method of claim 4 in which said monomers consist essentially of 50 to 60% butyl acrylate, 28 to 40% styrene and 10 to 13% acrylic acid.
Claim 8
Dependent Claim
22 words
The method of claim 5 in which said monomers consist essentially of about 50-60% butyl acrylate, 28-40% styrene and 10-13% methacrylic acid.
Claim 9
Dependent Claim
12 words
Sized polyester yarn prepared by the method of claim 4 or 6.
Claim 10
Dependent Claim
12 words
Sized nylon yarn prepared by the method of claim 5 or 7.
Claim 11
Dependent Claim
40 words
A method of weaving comprising the steps of preparing a sized yarn in accordance with the method of claim 4, 5, 6, or 7, weaving the yarn into fabric, and removing said vinyl polymer therefrom by an aqueous alkaline solution.
Claim 12
Dependent Claim
15 words
The method of claim 10 in which the weaving is by a water jet loom.
Claim 13
Dependent Claim
9 words
A fabric prepared by the method of claim 10.
Claim 14
Dependent Claim
10 words
A polyester fabric prepared by the method of claim 11.
References Cited (Backward Citations)
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US4015317A
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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) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |