# US 4,392,265 A · Method of modifying the dye affinity of cellulose fiber-containing structure with benzene sulfonyl chloride

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- Number: US 4,392,265 A
- Document ID: US4392265A
- Status: Granted
- Kind: A
- Application number: 06/320,763
- Filed: 1981-11-12
- Granted: 1983-07-12
- Earliest claimed: 1981-06-15
- Assignees: Toppan Printing Co., Ltd.
- Inventors: Takahiro Fujiu; Masao Nakajima; Shigeru Okano
- Web page: https://patentgrep.com/patent/US4392265A

## CPC

- D06P 5/005: {on resin-treated fibres}
- D06B 11/0089: {the textile material being a surface}
- D06M 13/256: Sulfonated compounds {esters thereof, e.g. sultones}
- D06P 5/22: Effecting variation of dye affinity on textile material by chemical means that react with the fibre {(documents concerning material modified in the mass by compounding with modifying agents affecting the dye affinity after spinning, are not classified here: see the relevant groups C08, D01F, D06P3/00; grafting of monomers on textile materials C08F, D06M11/00)}
- Y10S 8/918: Cellulose textile
- D06P: DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06B: TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS (mechanical treatment of natural fibrous or filamentary material to obtain fibres or filaments D01B)
- D06M: TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

The method involves treating a cellulose fiber-containing structure with an alkaline agent, coating the structure with an acid chloride having the following formula: ##STR1## (wherein X is --H, --NO.sub.2, --CH.sub.3 or --SO.sub.2 Cl) and subjecting the resultant structure to heat treatment to cause chemical modification. The acid chloride is employed in the form of an emulsion in water. The emulsion may also contain a thickener such as a natural sizing agent or a dye. The method provides a more dyeable cellulose fiber-containing structure.

## Claims

### Claim 1

A method of modifying the dye affinity of a cellulose fiber-containing structure, comprising the steps of treating a cellulose fiber structure or a mixed structure of a cellulose fiber and a synthetic fiber with an alkaline agent, coating the structure with an aqueous emulsion of an acid chloride having the formula: ##STR5## (wherein X is --H, --NO.sub.2, --CH.sub.3 or --SO.sub.2 Cl) and subjecting the coated structure to heat treatment prior to drying of the emulsion to cause chemical modification.

### Claim 2 (depends on 1)

A method according to claim 1, wherein the heat treatment is carried out by microwave heating.

### Claim 3 (depends on 2)

A method according to claim 2, wherein the microwave heating is carried out for 5 to 120 seconds.

### Claim 4 (depends on 1)

A method according to claim 1, wherein the emulsion contains the acid chloride, a disperse dye and a thickener.

### Claim 5 (depends on 4)

A method according to claim 4, wherein the thickener is an animal, vegetable or mineral sizing agent.

### Claim 6 (depends on 1)

A method according to claim 1, wherein the emulsion contains the acid chloride, a vegetable natural sizing agent, bentonite and a nonionic surface active agent.

### Claim 7 (depends on 1, 2, 3, 6)

A method according to any one of claims 1 to 3 and 6, wherein treatment with a resin capable of being dyed with a disperse dye is further carried out after the chemical modification.

### Claim 8 (depends on 1, 2, 3, 6)

A method according to any one of claims 1 to 3 and 6, wherein treatment with a fiber crosslinking agent and a crosslinking catalyst is carried out after the chemical modification.

### Claim 9 (depends on 1, 2, 3, 4, 5, 6)

A method according to any one of claims 1 to 6, wherein the fiber structure is partially chemically modified and subjected to heat treatment with a 40 to 75% sulfuric acid solution, whereby the chemically unmodified portion thereof is dissolved substantially completely to give a transparent pattern.