Bleaching and dyeing; fluid treatment and chemical modification – Chemical modification of textiles or fibers or products thereof – Treating textiles or fibers from synthetic resin or natural...
Patent
1972-08-14
1976-08-10
Levy, Donald
Bleaching and dyeing; fluid treatment and chemical modification
Chemical modification of textiles or fibers or products thereof
Treating textiles or fibers from synthetic resin or natural...
8174, 8175, 8158, 8 94A, D06P 500
Patent
active
039739082
ABSTRACT:
A method for dyeing polyester fibers by contacting the fiber, which may be in the form of loose fibers or staple, filament or texturized yarn, woven or knitted fabric, with a solution of a soluble dyestuff in a suitable solvent, such as a chlorinated solvent, reducing the volume of the solute in contact with the fiber while maintaining the volume of liquid in contact with the fiber substantially constant by addition of a nonsolvent, maintaining the temperature of the fiber and contacting solvent-nonsolvent at a temperature to effect dyeing. The process also includes the procedures for purifying the solvent and nonsolvent to enable their reuse (recycling) in the process economically and reducing the waste material from the process.
The process also provides for scouring and/or drying the fiber if such be necessary.
REFERENCES:
patent: 2828180 (1958-03-01), Lertorio
patent: 3473175 (1969-10-01), Lober
patent: 3523749 (1970-08-01), MacLeod et al.
patent: 3667898 (1972-06-01), Bergman et al.
patent: 3692467 (1972-09-01), Durr et al.
patent: 3706525 (1972-12-01), Blackwell et al.
patent: 3708260 (1973-01-01), Marshall
patent: 3765840 (1973-10-01), Durr et al.
Milicevic, "Solvent Dyeing; Theory & Practice" Teptile Chemist & Colorist, vol. 2, No. 5, (1970 pp. 87-98).
White, American Dyestuff Rep. July 31, 1967 pp. 591-597.
Baker Glwynn R.
Levy Donald
The Dow Chemical Company
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