Process for pre-treating cellulosic fibers and cellulosic fiber blends

• US 7,044,985 B2
• Filed: 12/15/2000
• Issued: 05/16/2006
• Est. Priority Date: 12/21/1999
• Status: Expired due to Fees

• Current Assignee: Clariant Finance (Bvi) Limited
• Original Assignee: Clariant Finance (Bvi) Limited
• Inventors: Grigat, Michael, Rizzardi, Angelo
• Primary Examiner(s): Gupta, Yogendra N.
• Assistant Examiner(s): Kumar, Preeti
• Application Number:
  US09/738,623
• Publication Number:
  US 20020007515A1
• Time in Patent Office: 1,978 Days
• Field of Search: 811/61, 818/1, 812/7, 510/437, 252 90- 99
• US Class Current: 8/115.51
• CPC Class Codes: D06L 4/12 combined with specific additives
• CPC Class Codes: D06L 4/13 using inorganic agents

Abstract

A process and formulation for pre-treating a cellulosic, or cellulosic blend with synthetic fiber, substrate, achieving sufficient clearness and appropriate absorbency prior to dyeing the substrate. The process having the steps of: providing a vessel; providing a cellulosic, or their blends with synthetic fiber, substrate; providing a water bath; adding an active amount of an activating compound selected from the group of: salts of organic acids, organic amine derivatives, transitional metals salts and complexes, pigments, and combinations thereof; adding an active amount of caustic soda; adding an active amount of hydrogen peroxide; achieving a pH from about 6.0 to about 9.0 at the end of the bleaching cycle; heating the water bath to a temperature in excess of 50 degrees centigrade for a pre-determined period of time; and dropping the bath.

Claims

1. A textile treatment bath composition for pre-treating a cellulosic, or cellulosic blends with synthetic fiber, substrate prior to dyeing comprising:

at least 90% water;

a non-foaming scouring/wetting agent;

a first activating compound formed of a mixture of urea and copper gluconate;

optionally, a second activating compound selected of a pigment;

caustic soda; and

hydrogen peroxide;

wherein said textile treatment bath composition starts with a slightly alkaline pH.

2. A textile treatment bath composition according to claim 1, wherein said second activating compound is a pigment selected from pigmented Sulfur Black 1 with a particle size less than 150 μ

m, titanium dioxide with a particle size less than 150 μ

m, fully pre-oxidized sulfur dyes, and combinations thereof.

3. A textile treated with the textile treatment bath composition of claim 1, wherein the textile is selected from the group consisting of cellulosic textiles and cellulosic blends with synthetic fiber textiles.