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US3972675A
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US
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Process for dyeing skins and furs
Assignee: Novartis AG
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Filing: 1974-07-11
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Granted: 1976-08-03
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Expires: 1994-07-11
Abstract
Abstract A new process for dyeing furs and skins below 70°C is provided, which process is carried out with aqueous dyebaths containing a dyestuff, up to 15 g per liter of the whole preparation of an organic non-ionizable oxo compound with only limited solubility in water and optionally an emulsifier for these compounds. According to this process furs and skins can be dyed in deep and level shades with a broad scope of dyestuffs without any pretreatments for improving the dye-receptivity of the substrates.
Inventors
- 👤 Max Schwank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:54
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/32; D06P3/3206; D06P3/30; D06P3/3008; D06P3/3058; D06P3/326; Y; Y10; Y10S; Y10S8/00; Y10S8/907; Y10S8/916
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
78 words
An exhaust process for dyeing skins and furs, comprising the step of applying to the skin or fur, in a goods-to-liquor ratio of 1:10 to 1:40, at a temperature in the range of 55° to 70°C, an aqueous dye bath having a pH of 3 to 6 which contains water, a water-soluble wool dyestuff, and 0.75 to 15 grams of a non-ionisable organic compound selected from the group consisting of isophorone and tributylphosphate, per liter of aqueous dyebath.
Claim 2
Dependent Claim
78 words
An exhaust process for dyeing skins and furs, comprising the step of applying to the skin or fur, in a goods-to-liquor ratio of 1:10 to 1:40, at a temperature in the range of 55° to 70°C, an aqueous dye bath having a pH of 3 to 6 which contains water, a water-soluble wool dyestuff, and 0.75 to 15 grams of a non-ionisable organic compound selected from the group consisting of isophorone and tributylphosphate, per liter of aqueous dyebath.
Claim 3
Dependent Claim
22 words
The process of claim 1, wherein the aqueous dye bath contains 6 to 12 grams of the non-ionisable organic compound per liter.
Claim 4
Dependent Claim
28 words
The process of claim 1, wherein the aqueous dye bath contains from 0.75 to 4 grams of the non-ionisable organic compound per liter and additionally contains an emulsifier.
Claim 5
Dependent Claim
20 words
The process of claim 3, wherein the emulsifier is a reaction product of fatty alcohol or alkylphenol with ethylene oxide.
Claim 6
Dependent Claim
37 words
The process of claim 1, wherein the dyestuff is a 1:2-chromium complex of cobalt complex dyestuff, which is free from sulfonic acid groups and free from carboxylic acid groups which do not participate in the complex formation.
Claim 7
Dependent Claim
26 words
The process of claim 1, wherein the dyestuff is a fiber-reactive dyestuff, containing as the reactive grouping, an acrylamide or α-halogenacrylamide group, or grouping convertible thereto.
Claim 8
Dependent Claim
16 words
The process of claim 1, wherein the temperature is in the range of 55° to 60°C.
Claim 9
Dependent Claim
16 words
The process of claim 1, wherein the pH is in the range of 3.5 to 5.
Claim 10
Dependent Claim
9 words
The process of claim 1, wherein sheepskins are dyed.
Claim 11
Dependent Claim
12 words
The process of claim 1, wherein the non-ionisable organic compound is isophorone.
Claim 12
Dependent Claim
12 words
The process of claim 1, wherein the non-ionisable organic compound is tributylphosphate.
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) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |