US3989456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing of polyester fibers
Assignee: BASF SE
•
Filing: 1975-03-06
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Granted: 1976-11-02
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Expires: 1995-03-06
Abstract
Abstract Polyester fibers are dyed level shades at above 100° C with disperse dyes from an aqueous liquor containing emulsions of aliphatic alcohols of 8 to 12 carbon atoms.
Inventors
- 👤 Michele Vescia
- 👤 Manfred Daeuble
- 👤 Rudi Widder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:17
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/651; D06P1/65106; D06P1/642; D06P1/6421; D06P3/00; D06P3/34; D06P3/52; D06P3/54; Y; Y10; Y10S; Y10S8/00; Y10S8/907; Y10S8/908; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
74 words
In a process for dyeing polyester fibers in water with a disperse dye at a temperature above 100° C, the improvement in obtaining a level dyeing which comprises: carrying out the dyeing of said fibers from an aqueous liquor containing, in addition to the disperse dye, from 0.05 to 0.5 percent by weight of an aliphatic alcohol of 8 to 12 carbon atoms in the form of an emulsion as the essential leveling agent.
Claim 2
Dependent Claim
74 words
In a process for dyeing polyester fibers in water with a disperse dye at a temperature above 100° C, the improvement in obtaining a level dyeing which comprises: carrying out the dyeing of said fibers from an aqueous liquor containing, in addition to the disperse dye, from 0.05 to 0.5 percent by weight of an aliphatic alcohol of 8 to 12 carbon atoms in the form of an emulsion as the essential leveling agent.
Claim 3
Dependent Claim
25 words
A process as claimed in claim 1, wherein the aqueous liquor contains 2-ethylhexanol, n-nonanol, 2-methyloctanol, n-undecanol, 2-methyldecanol, isodecanol or lauryl alcohol as the leveling agent.
Claim 4
Dependent Claim
31 words
A process as claimed in claim 1, wherein an aliphatic alcohol having an unbranched carbon chain or at most one methyl or ethyl side chain is used as the leveling agent.
Claim 5
Dependent Claim
20 words
A process as claimed in claim 1, wherein a mixture of non-ionic and anionic surfactants is used as an emulsifier.
Claim 6
Dependent Claim
47 words
A process as claimed in claim 4, wherein the non-ionic surfactant is a member selected from the group consisting of an unsaturated fatty acid oxyethylated with from 5 to 15 moles of ethylene oxide and castor oil oxyethylated with from 30 to 50 moles of ethylene oxide.
Claim 7
Dependent Claim
72 words
A process as claimed in claim 5, wherein the anionic surfactant is selected from the group consisting of the sodium, potassium or ammonium salts of sulfuric acid half-esters of fatty alcohols, of from 9 to 18 carbon atoms, which are oxyethylated with from 2 to 4 moles of ethylene oxide and the same salts of alkylbenzenesulfonic acids or alkylphenols, in each case of 6 to 12 carbon atoms in the alkyl radical.
Claim 8
Dependent Claim
48 words
A process as claimed in claim 6 wherein the non-ionic surfactant is employed in an amount of 5 to 40 percent by weight and the anionic surfactant is employed in an amount of 2.5 to 30 percent by weight, the percentages being with reference to said aliphatic alcohol.
Claim 9
Dependent Claim
26 words
A process as claimed in claim 1 wherein the content of said aliphatic alcohol in the aqueous liquor is from 0.1 to 0.3 percent by weight.
Claim 10
Dependent Claim
16 words
A process as claimed in claim 1 wherein the dyeing temperature is from 120°to 135° C.
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) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |