US3650663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treating synthetic linear polyesters fibers and film in the vapor phase to improve the dyeability and to heat set said polyesters
Assignee: Collins and Aikman Corp
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Filing: 1969-09-15
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Granted: 1972-03-21
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Expires: 1989-09-15
Abstract
Abstract A method is provided for improving the dyeability and for heat setting synthetic linear polyesters, wherein the polyester in fibrous or film form is contacted with a vapor of a monocyclic or bicyclic halogenated aromatic hydrocarbon for 10 4 to 20 seconds. The halogenated aromatic hydrocarbon is removed from the polyester after treatment. The polyester fibers and films treated in accordance with the method of this invention exhibits superior dyeing properties being readily dyed to deep shades in the absence of a carrier. The polyester fibers and films treated in accordance with the present invention likewise exhibit improved dimensional stability.
Inventors
- 👤 Frederick E Barwick
- 👤 Vernon C Smith
- 👤 Robert W Mccullough
- 👤 James B Hobgood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:24
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/651; D06P1/6515; D06P1/65156; D06C; D06C29/00; D06M; D06M13/00; D06M13/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
44 words
The method according to claim 1 wherein said polyester is contacted with a vapor of said halogenated aromatic hydrocarbon which is heated to a temperature above the boiling point of the halogenated aromatic hydrocarbon but below the shrink and decomposition temperature of the polyester.
Claim 2
Dependent Claim
32 words
The method according to claim 2 wherein said halogenated aromatic hydrocarbon is represented by the formula wherein X'' is chlorine or bromine and n'' is a whole number from 1 and 2.
Claim 3
Dependent Claim
10 words
The method according to claim 3 wherein X'' is chlorine.
Claim 4
Dependent Claim
34 words
The method according to claim 2 wherein said halogenated aromaTic hydrocarbon is heated to a temperature relative to the temperature of said polyester such that the halogenated aromatic hydrocarbon vapors condense on said polyester.
Claim 5
Dependent Claim
63 words
The method according to claim 2 wherein said halogenated aromatic hydrocarbon is heated to a temperature relative to the temperature of said polyester such that the halogenated aromatic hydrocarbon condenses on said polyester in a thin film and continuing heating said polyester until it is above the boiling point of the halogenated aromatic hydrocarbon, thereby causing said film to volatilize off said polyester.
Claim 6
Dependent Claim
21 words
The method according to claim 1 wherein the polyester after treatment with and removal of the halogenated aromatic hydrocarbon is dyed.
Claim 7
Dependent Claim
12 words
A polyester having improved dyeability prepared by the method of claim 1.
Claim 8
Dependent Claim
12 words
The dimensional stabilized polyester prepared according to the method of claim 1.
References Cited (Backward Citations)
US2999002A
Cited
US3512913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |