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US3644079A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for improving the dyeability and for heat setting synthetic linear polyesters

Assignee: Collins and Aikman Corp
•
Filing: 1969-07-11
•
Granted: 1972-02-22
•
Expires: 1989-07-11
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Abstract

Abstract A method is provided for improving a dyeability and for heat setting synthetic linear polyesters, wherein the polyester in fibrous or film form is contacted at an elevated temperature, for example, 120* to 200* C. for about 1 to 20 seconds with a monocyclic or bicyclic halogenated aromatic hydrocarbon. The halogenated aromatic hydrocarbon is extracted 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

  • 👤 Vernon C Smith
  • 👤 James Barnette Hobgood
  • 👤 Frederick E Barwick

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 21:35
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: 12
Claim 1
Independent Claim 15 words
The process according to claim 1 wherein said temperature is about 130* to 160* C.
Claim 2
Dependent Claim 32 words
The process according to claim 1 wherein said halogenated aromatic hydrocarbon is represented by the formula wherein X'' is chlorine or bromine and n'' is a whole number from two to three.
Claim 3
Dependent Claim 10 words
The process according to claim 3 wherein X'' is chlorine.
Claim 4
Dependent Claim 13 words
The process according to claim 4 wherein said halogenated aromatic hydrocarbon is 1,2,4-trichlorobenzene.
Claim 5
Dependent Claim 12 words
The process according to claim 4 wherein said halogenated hydrocarbon is 1,2,5-trichlorobenzene.
Claim 6
Dependent Claim 34 words
The process according to claim 1 wherein said halogenated aromatic hydrocarbon is extracted from the polyester with a solvent having a boiling point lower than and which is miscible with said halogenated aromatic hydrocarbon.
Claim 7
Dependent Claim 15 words
The process according to claim 7 wherein said solvent is a halogenated aliphatic hydrocarbon solvent.
Claim 8
Dependent Claim 26 words
The process according to claim 8 wherein said solvent is a member selected fRom the group consisting of methylene chloride, trichloroethylene, 1,1,1-trichloroethane, perchloroethylene and mixtures thereof.
Claim 9
Dependent Claim 21 words
The process according to claim 1 wherein the polyester after treatment with and removal of the halogenated aromatic hydrocarbon is dyed.
Claim 10
Dependent Claim 21 words
The process according to claim 10 wherein the dyeing is conducted in an aqueous medium in the absence of a carrier.
Claim 11
Dependent Claim 12 words
A polyester having improved dyeability prepared by the process of claim 1.
Claim 12
Dependent Claim 11 words
The dimensional stabilized polyester prepared by the process of claim 1.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-02-21 1975-08-23 1976-02-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-02-21 1979-08-23 1980-02-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-02-21 1983-08-23 1984-02-22 $7700.00 Window Closed / Lapsed

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