US3987227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Durably stain-repellant and soil-resistant pile fabric and process
Assignee: 3M Co
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Filing: 1974-11-06
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Granted: 1976-10-19
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Expires: 1994-11-06
Abstract
Abstract A durably soil-resistant pile fabric, such as a carpet, is provided which comprises a plurality of organic fibers having thereon a normally solid coating comprising (a) a first phase of a water-insoluble fluoroaliphatic radical free urethane adduct having at least one major transition temperature higher than about 45° C. and melting to a flowable liquid below about 200° C. and (b) a second phase of waterinsoluble fluoroaliphatic radical containing urethane adduct having at least one major transition temperature higher than about 45° C. and melting to a flowable liquid below about 200° C.
Inventors
- 👤 William J. Schultz
- 👤 Samuel Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:43
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3855; C08G18/3857; C08G18/3861; C08G18/2805; C08G18/288; C08G18/2885; D; D06; D06M; D06M13/00; D06M13/322; D06M13/402; D06M13/425; D06M13/428; D06M15/00; D06M15/19; D06M15/37; D06M15/564; D06M15/576; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/2395; Y10T428/23986; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
49 words
A durably stain-repellent and soil-resistant pile fabric having on the pile fibers thereof a coating consisting essentially of the combination of water-insoluble fluoroaliphatic-radical containing urethane adduct and water-insoluble urethane adduct free from fluoroaliphatic radicals, each said adduct becoming a flowable liquid above 45° C. and below about 200° C.
Claim 2
Dependent Claim
49 words
A durably stain-repellent and soil-resistant pile fabric having on the pile fibers thereof a coating consisting essentially of the combination of water-insoluble fluoroaliphatic-radical containing urethane adduct and water-insoluble urethane adduct free from fluoroaliphatic radicals, each said adduct becoming a flowable liquid above 45° C. and below about 200° C.
Claim 3
Dependent Claim
21 words
A durably stain-repellent and soil-resistant pile fabric according to claim 1 which is a carpet having a pile of synthetic fibers.
Claim 4
Dependent Claim
75 words
A durably stain-repellent and soil-resistant pile fabric according to claim 1 having on the pile fibers thereof a coating consisting essentially of the combination of water-insoluble fluoroaliphatic-radical containing urethane adduct and water-insoluble urethane adduct free from fluoroaliphatic radicals, each said adduct having at least one major transition temperature higher than about 45° C. and melting to a flowable liquid at temperatures below about 200° C., at least one of said adducts forming a continuous phase.
Claim 5
Dependent Claim
93 words
A durably stain-repellent and soil-resistant pile fabric according to claim 1 which is a carpet having a pile of synthetic fibers in which the coating consists of a first coating of fluoroaliphatic-radical containing urethane adduct over the pile and a second coating partially over said first coating and restricted to the distal portion of the face pile fibers of the carpet, said second coating consisting of fluoroaliphatic radical containing urethane adduct and fluoroaliphatic radical free urethane adduct, each said adduct melting to a flowable liquid above 45° C. and below about 200° C.
Claim 6
Dependent Claim
48 words
A durably stain-repellent and soil-resistant pile fabric according to Claim 3 wherein each fluoroaliphatic radical containing urethane adduct is (C 8 F 17 SO 2 NRC 2 H 4 OCONH) 2 C 6 H 3 CH 3 in which R is alkyl of 1 to 3 carbon atoms.
Claim 7
Dependent Claim
102 words
A process for rendering a synthetic pile fabric stain-repellent and soil-resistant without enhancing the flammability thereof which comprises the step of applying to said fabric, in an amount sufficient to provide at least 0.02% by weight of carbon-bonded fluorine on the weight of the face pile fibre, a dispersion at a concentration of from 0.02 to about 25% by weight solids of the combination of fluoroaliphatic radical-containing urethane adduct and fluoroaliphatic radical free urethane adduct in proportions of from about 1:1.5 to about 4:1, each of said adducts melting to a flowable liquid at above 45° C. and below about 200° C.
Claim 8
Dependent Claim
102 words
A process for rendering a synthetic pile fabric stain-repellent and soil-resistant without enhancing the flammability thereof which comprises the step of applying to said fabric, in an amount sufficient to provide at least 0.02% by weight of carbon-bonded fluorine on the weight of the face pile fibre, a dispersion at a concentration of from 0.02 to about 25% by weight solids of the combination of fluoroaliphatic radical-containing urethane adduct and fluoroaliphatic radical free urethane adduct in proportions of from about 1:1.5 to about 4:1, each of said adducts melting to a flowable liquid at above 45° C. and below about 200° C.
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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) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |