Patent US3871898A successfully refreshed from Google Patents.
US3871898A
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Process for the optical brightening of organic fibre material
Assignee: Novartis AG
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Filing: 1971-08-23
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Granted: 1975-03-18
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Expires: 1991-08-23
Abstract
Abstract A process for the non-aqueous optical brightening of organic fibre material, especially fibre material made from cellulose, natural or synthetic polyamide, by the exhaustion method, is disclosed, which comprises treating said fibre material in the solution of at least one optical brightener salt consisting of the anionic radical of an anionic optical brightener and at least one cationic radical of an inorganic or organic base, said organic base being derived from an organic nitrogen compound containing at least one nitrogen atom capable of salt formation, in a solvent mixture consisting of unsubstituted or halogenated hydrocarbon boiling between 50* and 150*C and liquid, water soluble organic solvent boiling below 220*, at a temperature between room temperature and the boiling point of the solvent mixture, optionally under pressure, and finishing the brightened fibre material in the usual manner. By this process, excellent white-effects or brightenings having good fastness properties, such as fastness to dry cleaning and washing, are obtained on said fibre material, without any subsequent heat treatment such as steaming or thermofixing.
Inventors
- 👤 Gerhard Reinert
- 👤 Alois Kleemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:24
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/90; D06P1/92; D06P1/928; D06L; D06L4/00; D06L4/60; D06L4/607; D06P1/922; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917; Y10S8/918; Y10S8/92; Y10S8/924
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
145 words
AT LEAST ONE OPTICAL BRIGHTENER SALT CONSISTING OF THE ANIONIC RADICAL OF AN ANIONIC OPTICAL BRIGHTENER AND AT LEAST ONE CATIONIC RADICAL OF AN INORGANIC BASE, II. A SOLVENT MIXTURE CONSISTING OF A. FROM 50 TO 99 PERCENT BY WEIGHT OF HALOGENATED HYDROCARBON BOILING BETWEEN 50* AND 150*C, THE BALANCE CONSISTNG OF B. A LIQUID, WATER-SOLUBLE ORGANIC SOLVENT BOILING BELOW 220*C AND SELECTED FROM THE GROUP CONSISTING OF ALKANOLS, CYCLOALIPHATIC ALCOHOLS, ARALIPHATIC ALCOHOLS, ALIPHATIC AND CYCLOALIPHATIC KETONES, ALKYLENE GLYCOL MONOALKYL ESTERS, FURFURYL ALCOHOL, TETRAHYDROFURFURYL ALCOHOL, LOWER CYCLIC ETHERS LOWER ANHYDROUS MONOCARBOXYLIC ACID, N,NDIALKYLAMIDES OF LOWER MONOCARBOXYLIC ACIDS, AMIDES OF CARBONIC ACID, CYCLIC AMIDES, LOWER CARBOXYLIC ACID NITRILES, AND MIXTURES, THEREOF WHICH ARE SOLUBLE IN WATER, AT A TEMPERATURE BETWEEN ROOM TEMPERATURE AND THE BOILING POINT OF THE SOLVENT MIXTURE, OPTIONALLY UNDER PRESSURE, AND B. FINISHING THE BRIGHTNED FIBRE MATERIAL BY REMOVING EXCESS SOLVENT AND DRYING.
Claim 2
Dependent Claim
145 words
AT LEAST ONE OPTICAL BRIGHTENER SALT CONSISTING OF THE ANIONIC RADICAL OF AN ANIONIC OPTICAL BRIGHTENER AND AT LEAST ONE CATIONIC RADICAL OF AN INORGANIC BASE, II. A SOLVENT MIXTURE CONSISTING OF A. FROM 50 TO 99 PERCENT BY WEIGHT OF HALOGENATED HYDROCARBON BOILING BETWEEN 50* AND 150*C, THE BALANCE CONSISTNG OF B. A LIQUID, WATER-SOLUBLE ORGANIC SOLVENT BOILING BELOW 220*C AND SELECTED FROM THE GROUP CONSISTING OF ALKANOLS, CYCLOALIPHATIC ALCOHOLS, ARALIPHATIC ALCOHOLS, ALIPHATIC AND CYCLOALIPHATIC KETONES, ALKYLENE GLYCOL MONOALKYL ESTERS, FURFURYL ALCOHOL, TETRAHYDROFURFURYL ALCOHOL, LOWER CYCLIC ETHERS LOWER ANHYDROUS MONOCARBOXYLIC ACID, N,NDIALKYLAMIDES OF LOWER MONOCARBOXYLIC ACIDS, AMIDES OF CARBONIC ACID, CYCLIC AMIDES, LOWER CARBOXYLIC ACID NITRILES, AND MIXTURES, THEREOF WHICH ARE SOLUBLE IN WATER, AT A TEMPERATURE BETWEEN ROOM TEMPERATURE AND THE BOILING POINT OF THE SOLVENT MIXTURE, OPTIONALLY UNDER PRESSURE, AND B. FINISHING THE BRIGHTNED FIBRE MATERIAL BY REMOVING EXCESS SOLVENT AND DRYING.
Claim 3
Dependent Claim
39 words
A PROCESS FOR THE NON-AUEOUS OPTICAL BRIGHTENING OF ORGANIC FIBRE MATERIAL BY THE EXHAUSTION METHOD, WHICH ESSENTIALLY COMPRISES THE STEPS OF A. TREATING SAID FIBRE MATERIAL, AT A GOOD: LIQUOR RATIO OF AT LEAST 1:5 IN THE SOLUTION OF
Claim 4
Dependent Claim
39 words
A PROCESS FOR THE NON-AUEOUS OPTICAL BRIGHTENING OF ORGANIC FIBRE MATERIAL BY THE EXHAUSTION METHOD, WHICH ESSENTIALLY COMPRISES THE STEPS OF A. TREATING SAID FIBRE MATERIAL, AT A GOOD: LIQUOR RATIO OF AT LEAST 1:5 IN THE SOLUTION OF
Claim 5
Dependent Claim
35 words
A process as defined in claim 1, wherein the optical brightener salt defined under (I) is an alkali metal salt or ammonium salt of an optical brightener containing sulphonic acid groups and/or carboxylic acid groups.
Claim 6
Dependent Claim
46 words
A process as defined in claim 1, wherein the anionic optical brightener defined under (I) is selected from derivatives of distyryl acids, 4,4''-bis-triazinylamino-stilbene-sulphonic acids, stilbyl-naphthotriazole-carboxylic acids or sulphonic acids, 4, 4''-bis-v-triazolyl-stilbene-sulphonic acids or of derivatives of diaryl- and triaryl-pyrazolines containing carboxylic acid or sulphonic acid groups.
Claim 7
Dependent Claim
109 words
A process as defined in claim 1, wherein the solvent mixture defined under (II) consists of Alpha . from 80 to 99 percent by weight of halogenated lower aliphatic hydrocarbon having a boiling point between 50* and 150* C, the balance consisting of Beta . a liquid, water soluble, organic solvent boiling below 220* C and selected from the group consisting of alkanols, cycloaliphatic alcohols, araliphatic alcohols, aliphatic and cycloaliphatic ketones, alkylene glycol monoalkyl ethers, furfuryl alcohol, tetrahydrofurfuryl alcohol, lower cyclic ethers, lower anhydrous monocarboxylic acids, N,N-dialkylamides of lower monocarboxylic acids, amides of carbonic acid, cyclic amides, lower carboxylic acid nitriles, and mixtures thereof which are soluble in water.
Claim 8
Dependent Claim
59 words
A process as defined in claim 1, wherein the solvent mixture defined under (II) consists of Alpha . from 90 to 99 percent by weight of trichloroethylene, tetrachloroethylene, trichloroethane or trifluorotrichloroethane, the balance consisting of Beta . a lower alkanol, an N,N-dialkylamide of a lower monocarboxylic acid, a lower alkylene glycol monoalkyl ether, or a ketone, or mixtures thereof.
Claim 9
Dependent Claim
15 words
A process as defined in claim 5, wherein said lower alkanol is methanol or ethanol.
Claim 10
Dependent Claim
19 words
A process as defined in claim 5, wherein said N,N-dialkylamide of a lower monocarboxylic acid is dimethylformamide or dimethylacetamide.
Claim 11
Dependent Claim
19 words
A process as defined in claim 5, wherein said lower alkylene glycol monoalkyl ether is ethylene monoglycol methyl ether.
Claim 12
Dependent Claim
12 words
A process as defined in claim 5, wherein said ketone is acetone.
Claim 13
Dependent Claim
21 words
A process as defined in claim 1, wherein said organic fibre material consists of cellulose fibres, natural or synthetic polyamide fibres.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |