US 3,973,907 A · Dyeing of halogenated aromatic polyester fibrous materials with dimethylterephthalate

Abstract

Heretofore, halogenated aromatic polyesters (as defined), such as those formed by the reaction of tetrabromobisphenol A, and a mixture of isophthaloyl chloride and terephthaloyl chloride, have proven to be extremely difficult to dye and to undergo a deleterious fiber degradation when dyeing is attempted in the presence of common dye carriers. Difficulties heretofore encountered when attempts have been made to dye such fibrous materials effectively are eliminated in the substantial absence of fiber degradation when practicing the present process. The dyeing of the specifically defined halogenated aromatic polyester fibrous material with an aqueous disperse dye system is carried out in a closed dyeing zone at a temperature of about 110.degree. to 130.degree.C. in the presence of a dimethylterephthalate dye carrier.

Claims12

Dependent claims

An improved process for dyeing of a halogenated aromatic polyester fibrous material having recurring units of the formula:

##SPC4##
where X is chlorine or bromine, Y is hydrogen, chlorine or bromine, R and R' may be the same or different and represent lower alkyl groups, hydrogen, or together constitute a cyclic hydrocarbon group, and n = at least 25, comprising contacting said fibrous material with an aqueous dyebath in a closed dyeing zone at a temperature of about 110.degree. to 130.degree.C. containing a disperse dye and an effective concentration of a dimethylterephthalate dye carrier in the substantial absence of fiber

Dependencies are inferred from the claim text.

Dyeing of halogenated aromatic polyester fibrous materials with dimethylterephthalate

Life of this patent

Dyeing of halogenated aromatic polyester fibrous materials with dimethylterephthalate

Life of this patent

Abstract

Claims12