US3844713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkyl and aryl phosphites to inhibit ozone fading of dyed polyamides
Assignee: Honeywell International Inc
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Filing: 1972-04-11
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Granted: 1974-10-29
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Expires: 1992-04-11
Abstract
Abstract When from about 0.7 percent to about 3 percent of organic phosphites are coated on nylon fiber, or are added to the polymer prior to spinning, improved dyefastness is achieved compared to an untreated dyed nylon fiber when this fiber is exposed to ozone.
Inventors
- 👤 P Saunders
- 👤 B Dementi
- 👤 R Lofquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:16
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/667; D06P5/00; D06P5/15; D06P5/17; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/924; Y10S8/929
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
IN A METHOD FOR DYEING NYLON FIBERS WITH ANTHROQUINONE DYES, THE IMPROVEMENT COMPRISING COATING THE FIBER WITH A SUBSTANCE CONSISTING ESSENTIALLY OF ARYL HYDROCARBON, ARALKYL HYDROCARBON, SATURATED ALKYL OR A POLYMERIC PROPOXYLATED PHENYL ORGANIC PHOSPHITE HAVING A MOLECULAR WEIGHT OF FROM ABOUT 200 TO ABOUT 2500 SO THAT FROM ABOUT 0.7 TO ABOUT 3 PERCENT ON WEIGHT OF FIBER OF SAID PHOSPHITE REMAINS ON SAID FIBERS AFTER DYEING WHEREBY SAID DYE POLYCARBONAMIDE FIBERS HAVE IMPROVED DYEFASTNESS WHEN EXPOSED TO OZONE, SAID COATING BEING APPLIED SUBSEQUENT TO THE DYEING FIBER.
Claim 2
Dependent Claim
89 words
IN A METHOD FOR DYEING NYLON FIBERS WITH ANTHROQUINONE DYES, THE IMPROVEMENT COMPRISING COATING THE FIBER WITH A SUBSTANCE CONSISTING ESSENTIALLY OF ARYL HYDROCARBON, ARALKYL HYDROCARBON, SATURATED ALKYL OR A POLYMERIC PROPOXYLATED PHENYL ORGANIC PHOSPHITE HAVING A MOLECULAR WEIGHT OF FROM ABOUT 200 TO ABOUT 2500 SO THAT FROM ABOUT 0.7 TO ABOUT 3 PERCENT ON WEIGHT OF FIBER OF SAID PHOSPHITE REMAINS ON SAID FIBERS AFTER DYEING WHEREBY SAID DYE POLYCARBONAMIDE FIBERS HAVE IMPROVED DYEFASTNESS WHEN EXPOSED TO OZONE, SAID COATING BEING APPLIED SUBSEQUENT TO THE DYEING FIBER.
Claim 3
Dependent Claim
51 words
In a method of dyeing nylon fibers with anthraquinone dyes, the improvement comprising adding a phosphite of claim 1 to the polymer which forms said fiber before spinning, said phosphite remaining in said fibers in an amount from about .7 percent to about 3 percent on the weight of the fiber.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein said anthraquinone dyes are disperse dyes.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein said anthraquinone dyes are basic dyes.
Claim 6
Dependent Claim
21 words
The method of claim 1 wherein said phosphites are selected from the group consisting of triphenyl phosphite, tridecyl phosphite and tris(nonylphenyl)phosphite.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |