US3971626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fat-liquoring agent for waterproofing leather and skins
Assignee: Henkel AG and Co KGaA
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Filing: 1974-10-29
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Granted: 1976-07-27
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Expires: 1994-10-29
Abstract
Abstract A process for preparing waterproof leathers by fat-liquoring with an aqueous liquor containing esters of citric acid with higher fatty alcohols which are used as the impregnating agent, characterized in that the fat-liquoring agent contains a mixture emulsified in water which consists of (A) an acid ester of citric acid with a higher fatty alcohol having chain lengths of 12 to 22 carbon atoms and (B) an organic alcohol solvent for the citric acid ester which is totally or partially soluble in water and which have a boiling point above 100°C.
Inventors
- 👤 Rudi Heyden
- 👤 Adolf Asbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:35
CPC Classifications
C; C14; C14C; C14C9/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
91 words
A process for manufacturing waterproof leather or skins, which comprises impregnating said leather or skins with an effective water-proofing amount of an aqueous fat-liquoring emulsion of a mixture of (A) an acid ester of citric acid with a fatty alcohol having 12 to 22 carbon atoms, and (B) an organic alcohol solvent for said ester of citric acid which is totally or partially soluble in water and which has a boiling point above 100°C., the ratio of component (A) to component (B) being between 9 : 1 and 1 : 9.
Claim 2
Dependent Claim
91 words
A process for manufacturing waterproof leather or skins, which comprises impregnating said leather or skins with an effective water-proofing amount of an aqueous fat-liquoring emulsion of a mixture of (A) an acid ester of citric acid with a fatty alcohol having 12 to 22 carbon atoms, and (B) an organic alcohol solvent for said ester of citric acid which is totally or partially soluble in water and which has a boiling point above 100°C., the ratio of component (A) to component (B) being between 9 : 1 and 1 : 9.
Claim 3
Dependent Claim
59 words
The process of claim 1, wherein component (A) is an acid ester of citric acid with a fatty alcohol selected from the group consisting of a straight-chain unsaturated fatty alcohol having 12 to 18 carbon atoms, a branched-chain saturated fatty alcohol having 12 to 18 carbon atoms, and a branched-chain unsaturated fatty alcohol having 12 to 18 carbon atoms.
Claim 4
Dependent Claim
55 words
A process according to claim 1 wherein the organic alcohol is selected from the group consisting of the alkanediols having 2 to 6 carbon atoms, the monoalkyl ethers of alkanediols having 2 to 6 carbon atoms with lower alkanols having 1 to 6 carbon atoms, and the cycloalkylether alcohols having 4 to 6 carbon atoms.
Claim 5
Dependent Claim
31 words
The process of claim 1, wherein component (B) is a monoalkyl ether of an alkanediol having 2 to 6 carbon atoms with a lower alkanol having 1 to 6 carbon atoms.
Claim 6
Dependent Claim
18 words
The process of claim 1, wherein component (B) is a cycloalkylether alcohol having 4 to 6 carbon atoms.
Claim 7
Dependent Claim
37 words
The process of claim 1, wherein component (A) is an acid ester of citric acid selected from the group consisting of citric acid-monooleyl ester, citric acid-monoalkenyl ester having 12 to 18 carbon atoms and citric acid-monoisooctadecyl ester.
Claim 8
Dependent Claim
46 words
The process of claim 1, wherein component (B) is an organic solvent selected from the group consisting of ethanediol, 1,2-propanediol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 2-methyl-2-propyl-1,3-propanediol and 2-methyl-2,4-pentanediol, glycol monomethyl ether, glycol monoethyl ether, glycol monobutyl ether, 1,2-propanediol monobutyl ether, tetrahydrofurfuryl alcohol and the mixtures thereof.
Claim 9
Dependent Claim
12 words
The process of claim 1, wherein component (B) is the tetrahydrofurfuryl alcohol.
Claim 10
Dependent Claim
24 words
The process of claim 1, wherein the ratio of component (A) to component (B) ranges from 1 : 1 to 2 : 1. pg,17
Claim 11
Dependent Claim
29 words
The process of claim 1, wherein said fat-liquoring emulsion contains an amount of ammonia which is not sufficient for the complete neutralization of the acid ester of citric acid.
Claim 12
Dependent Claim
13 words
The process of claim 1, wherein said leather is a chrome tanned leather.
Claim 13
Dependent Claim
105 words
A fat-liquoring aqueous preparation for waterproofing leather or skins consisting essentially of an aqueous emulsion of a mixture of (A) an acid ester of citric acid with a fatty alcohol having 12 to 22 carbon atoms and (B) and organic alcohol solvent for said acid ester of citric acid which is totally or partially soluble in water and which has a boiling point of over 100°C., the amount of said acid ester of citric acid being from 3% to 8% by weight of the fat-liquoring aqueous preparation, and the ratio of component (A) to component (B) being from 9 : 1 to 1 : 9.
Claim 14
Dependent Claim
105 words
A fat-liquoring aqueous preparation for waterproofing leather or skins consisting essentially of an aqueous emulsion of a mixture of (A) an acid ester of citric acid with a fatty alcohol having 12 to 22 carbon atoms and (B) and organic alcohol solvent for said acid ester of citric acid which is totally or partially soluble in water and which has a boiling point of over 100°C., the amount of said acid ester of citric acid being from 3% to 8% by weight of the fat-liquoring aqueous preparation, and the ratio of component (A) to component (B) being from 9 : 1 to 1 : 9.
Claim 15
Dependent Claim
17 words
The process of claim 1, wherein component (B) is an alkanediol having 2 to 6 carbon atoms.
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) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |