Patent US4565717A successfully refreshed from Google Patents.
US4565717A
Expired / Lapsed
US
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Antisoiling treatment of synthetic filaments
Assignee: EIDP Inc
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Filing: 1983-10-20
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Granted: 1986-01-21
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Expires: 2003-10-20
Abstract
Abstract Antisoiling properties of polyamide filaments are enhanced upon melt-spinning by using a spin finish comprised of a textile lubricant, an antisoiling fluorochemical and an epoxy resin.
Inventors
- 👤 Edward A. Hosegood
- 👤 Ludwig E. Seufert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:34
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/55; D06M15/21; D06M15/263; D06M15/277; D06M7/00; D06M2200/00; D06M2200/40
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
90 words
A process for producing synthetic polyamide filaments of enhanced soil resistance through the application of a fluorochemical antisoiling agent to the filaments as a yarn finish during a melt-spinning process which comprises applying to freshly solidified filaments a first finish composition containing a textile lubricant, an antisoiling fluorochemical and an epoxy resin having an epoxy equivalent of less than 200 and a molecular weight of less than 500 and subsequently applying any curing agent to substantially remove all of any free epoxide, such that the synthetic polyamide filaments resist soiling.
Claim 2
Dependent Claim
90 words
A process for producing synthetic polyamide filaments of enhanced soil resistance through the application of a fluorochemical antisoiling agent to the filaments as a yarn finish during a melt-spinning process which comprises applying to freshly solidified filaments a first finish composition containing a textile lubricant, an antisoiling fluorochemical and an epoxy resin having an epoxy equivalent of less than 200 and a molecular weight of less than 500 and subsequently applying any curing agent to substantially remove all of any free epoxide, such that the synthetic polyamide filaments resist soiling.
Claim 3
Dependent Claim
31 words
A process of claim 1 wherein a second finish composition is subsequently applied to the filaments which second finish contains a textile lubricant and a curing agent for the epoxy resin.
Claim 4
Dependent Claim
32 words
A process of claim 2 wherein the fluorochemical comprises a perfluoroalkyl ester of a carboxylic acid containing 3 to 30 carbon atoms and the perfluroalkyl radical contains 6 to 14 carbon atoms.
Claim 5
Dependent Claim
33 words
A process of claim 3 wherein the filaments are heated after the first finish is applied and prior to being packaged to a temperature sufficient to soften and cause flowing of the fluorochemical.
Claim 6
Dependent Claim
26 words
A process of claim 2 wherein the first finish is applied as a primary spin finish to the freshly spun filaments prior to their being drawn.
Claim 7
Dependent Claim
56 words
A process of claim 1 wherein the fluorochemical is a perfluoroalkyl citrate tri-ester bis-urethane of a fluorinated alcohol of the formula C n F 2n+1 (CH 2 ) 2 OH and the citric acid bis-urethane is of 1,6-hexamethylene diisocyanate; the epoxy resin is a diglycidyl ether of bisphenol A and the curing agent is polyethylene imine.
Claim 8
Dependent Claim
19 words
A process of claim 6 wherein the first and second finish compositions contain a copolyalkylene glycol ether textile lubricant.
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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) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |