Colorants, polyester fibers mass-colored therewith and process f

Details Colorants, polyester fibers mass-colored therewith and process f Colorants, polyester fibers mass-colored therewith and process f

1991-01-23

1992-04-21

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524605, C08J 320, C08K 515, C08L 6702

Patent

active

051069059

ABSTRACT:
A heat resistant colorant for mass-coloring polyester such as polyethylene terephthalate, containing 100 parts of pigments and/or dyes and 42.about.2,000 parts of a liquid aliphatic polyester dispersing medium having a viscosity at 25.degree. C. not exceeding 150 poises and a hydroxyl value not exceeding 25 mgKOH/g. The dispersing medium contains a polycondensate of alkylene glycols including at least 30% by weight of 1,3-butanediol with at least one aliphatic dicarboxylic acid, which polycondensate has at least one terminal group blocked with a monohydric alcohol. The colorants are easily blended and uniformly dispersed in a fiber grade polyester, without causing degradation of the polyester. Fibers mass-colored by the colorant are excellent in stability during their manufacture and uniform in quality.

REFERENCES:
patent: 4879335 (1989-11-01), Hirota et al.

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