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GB702050A - Improvements in the coloration of cellulosic materials with vat dyes - Google Patents

Improvements in the coloration of cellulosic materials with vat dyes

Info

Publication number
GB702050A
GB702050A GB1545750A GB1545750A GB702050A GB 702050 A GB702050 A GB 702050A GB 1545750 A GB1545750 A GB 1545750A GB 1545750 A GB1545750 A GB 1545750A GB 702050 A GB702050 A GB 702050A
Authority
GB
United Kingdom
Prior art keywords
vat dye
thiourea dioxide
vat
dye
impregnated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1545750A
Inventor
Pavel Krug
Fred Scholefield
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Borax Europe Ltd
Original Assignee
Hardman and Holden Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hardman and Holden Ltd filed Critical Hardman and Holden Ltd
Priority to GB1545750A priority Critical patent/GB702050A/en
Publication of GB702050A publication Critical patent/GB702050A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/22—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using vat dyestuffs including indigo
    • D06P1/225—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using vat dyestuffs including indigo using acid vat method

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Coloring (AREA)

Abstract

Cellulosic materials are treated to form within them a fine dispersion of a vat dyestuff by causing an acid leuco vat dye, with which the material is impregnated, to oxidize to the vat dye, the acid leuco vat having been prepared by reducing the vat dye with thiourea dioxide. The material may be impregnated with a suspension of pre-formed acid leuco vat dye prepared by reducing the vat dye in the presence of alkali with thiourea dioxide and subsequently acidifying. A dispersing agent may be present. In a modification, the material is impregnated with a suspension of vat dye and thiourea dioxide and the acid leuco vat dye is formed in situ by heating the material to at least 80 DEG C in the presence of moisture. In either case, the material containing the vat dye dispersed therein is then dyed by alkaline reduction of the dye to fix it on the materials; sodium hydrosulphite may be used for this reduction. In Examples (1), (2) and (3), cotton, linen or spun rayon-wool cloth is impregnated with an acid leuco vat dye prepared with thiourea dioxide, and the material then developed in a bath containing sodium hydrosulphite or thiourea dioxide and finieshed in the usual way; (4), (5) and (6) spun rayon, rayon-wool or cotton cloth is padded with a composition containing thiourea dioxide and a vat dye together with a dyeing assistant and a thickener, steamed at 100 DEG C with saturated steam, and the dyeing developed by means of alkaline hydrosulphite. Specifications 702,040 and 702,041 are referred to.
GB1545750A 1950-06-21 1950-06-21 Improvements in the coloration of cellulosic materials with vat dyes Expired GB702050A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1545750A GB702050A (en) 1950-06-21 1950-06-21 Improvements in the coloration of cellulosic materials with vat dyes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1545750A GB702050A (en) 1950-06-21 1950-06-21 Improvements in the coloration of cellulosic materials with vat dyes

Publications (1)

Publication Number Publication Date
GB702050A true GB702050A (en) 1954-01-06

Family

ID=10059477

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1545750A Expired GB702050A (en) 1950-06-21 1950-06-21 Improvements in the coloration of cellulosic materials with vat dyes

Country Status (1)

Country Link
GB (1) GB702050A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3077370A (en) * 1958-04-08 1963-02-12 Standfast Dyers & Printers Ltd Dyeing of cellulosic material with vat dyestuffs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3077370A (en) * 1958-04-08 1963-02-12 Standfast Dyers & Printers Ltd Dyeing of cellulosic material with vat dyestuffs

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