US3847543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reducing shrinkage of textile materials
Assignee: Milliken Research Corp
•
Filing: 1972-11-28
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Granted: 1974-11-12
•
Expires: 1992-11-28
Abstract
Abstract A process for reducing the shrinkage of a textile material which comprises impregnating the textile with an aqueous dispersion of an aliphatic polyisocyanate and a polyglycol having a molecular weight between about 300 and 12,000 and a functionality based on hydroxyl groups between about 2 and 4 per molecule. The polyisocyanate and the polyglycol are reacted to render the textile less susceptible to shrinkage.
Inventors
- 👤 C Carroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:37
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/564; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4833; C08G18/4837; C08G18/70; C08G18/72; C08G18/73; C08G18/74; C08G18/75
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
94 words
A PROCESS FOR REDUCING THE SHRINKAGE OF A WOOLEN OR POLYACRYLIC FIBER-CONTAINING TEXTILE MATERIAL WHICH COMPRISES IMPREGNATING SAID TEXTILE WITH AN AQUEOUS DISPERSION OF A CYCLOALIPHATIC POLYISOCYANATE AND A POLYGLYCOL HAVING A MOLECULAR WEIGHT BETWEEN ABOUT 300 AND 12,000 AND HAVING FOUR HYDROXYL GROUPS PER MOLECULE AND FOUR POLYOXYALKYLENE CHAINS INCLUDING BOTH POLYOXYETHYLENE AND POLYOXYPROPYLENE MOLECULES, REACTING SAID POLYISOCYANATE AND SAID POLYGLYCOL TO RENDER SAID TEXTILE LESS SUSCEPTIBLE TO SHRINKAGE AND DRYING SAOD TEXTILE, THE RAIO OF ISOCYANATE GROUPS IN THE POLYSIOCYANATE TO HYDROXYL GROUPS IN THE POLYGLYCOL BEING BETWEEN ABOUT 2:1 AND 3:1.
Claim 2
Dependent Claim
94 words
A PROCESS FOR REDUCING THE SHRINKAGE OF A WOOLEN OR POLYACRYLIC FIBER-CONTAINING TEXTILE MATERIAL WHICH COMPRISES IMPREGNATING SAID TEXTILE WITH AN AQUEOUS DISPERSION OF A CYCLOALIPHATIC POLYISOCYANATE AND A POLYGLYCOL HAVING A MOLECULAR WEIGHT BETWEEN ABOUT 300 AND 12,000 AND HAVING FOUR HYDROXYL GROUPS PER MOLECULE AND FOUR POLYOXYALKYLENE CHAINS INCLUDING BOTH POLYOXYETHYLENE AND POLYOXYPROPYLENE MOLECULES, REACTING SAID POLYISOCYANATE AND SAID POLYGLYCOL TO RENDER SAID TEXTILE LESS SUSCEPTIBLE TO SHRINKAGE AND DRYING SAOD TEXTILE, THE RAIO OF ISOCYANATE GROUPS IN THE POLYSIOCYANATE TO HYDROXYL GROUPS IN THE POLYGLYCOL BEING BETWEEN ABOUT 2:1 AND 3:1.
Claim 3
Dependent Claim
13 words
The process according to claim 1 wherein the polyisocyanate is a polycycloaliphatic polyisocyanate.
Claim 4
Dependent Claim
18 words
The process according to claim 1 wherein the polyglycol has a molecular weight between about 3,000 and 6,000.
Claim 5
Dependent Claim
17 words
The process according to claim 1 wherein the reaction is conducted in the presence of a catalyst.
Claim 6
Dependent Claim
14 words
The process according to claim 4 wherein the catalyst is an organo metallic compound.
Claim 7
Dependent Claim
14 words
The process according to claim 5 wherein the catalyst is an organo tin compound.
Claim 8
Dependent Claim
13 words
The process according to claim 1 wherein the dispersion is an aqueous emulsion.
Claim 9
Dependent Claim
17 words
The process according to claim 7 wherein the emulsion includes an emulsifying agent or an organic liquid.
Claim 10
Dependent Claim
18 words
The process according to claim 8 wherein the aqueous emulsion has a pH between about 4 and 9.
Claim 11
Dependent Claim
12 words
The process according to claim 1 wherein the fabric contains keratin fibers.
Claim 12
Dependent Claim
12 words
The process according to claim 1 wherein the fabric contains acrylic fibers.
Claim 13
Dependent Claim
15 words
The process according to claim 1 wherein the fabric is dried at an elevated temperature.
Claim 14
Dependent Claim
20 words
The process according to claim 1 wherein the fabric is dried at a temperature between about 220* and 325* F.
Claim 15
Dependent Claim
21 words
The process according to claim 1 wherein the fabric after drying is stored in roll form for at least 24 hours.
Claim 16
Dependent Claim
22 words
The process according to claim 1 wherein the fabric after drying is stored in roll form between about 24 and 120 hours.
Claim 17
Dependent Claim
11 words
A textile material produced according to the process of claim 1.
Claim 18
Dependent Claim
26 words
A textile fabric produced according to the process of claim 1 in which between about 0.5 percent and 20 percent polymer is present in the fabric.
References Cited (Backward Citations)
US2537064A
Cited
US2893898A
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US3558264A
Cited
GB1097516A
Cited
US3498740A
Cited
US3687605A
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 |