The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 27, 1977
Filed:
Sep. 13, 1973
Dara Ardeshir Jilla, Collinsville, VA (US);
Martin Processing Co., Inc., Martinsville, VA (US);
Abstract
A process is disclosed for preparing shaped or preformed polyester material for coloring with acid type dyes, which comprises impregnating the shaped or preformed polyester material, preferably but not necessarily continuously, at a temperature between 90.degree. C. and 250.degree. C. at ordinary atmospheric pressure with a mixture of (a) an organic nitrogen compound and (b) a glycol, an alcohol, a ketone, an ether, or water; then cooling the treated material with cold water or a mixture of a carboxylic acid with cold water whereby to impart affinity for acid dyes to the treated polyester material. Coloring the treated polyester material is then effected such as by padding, printing or cascading the treated polyester material with an acid dye from an aqueous solution or a printing paste whereby to effect fixation of said acid dye on the treated polyester material with substantially uniform distribution thereof within the polyester material. The organic nitrogen compound is an alkyleneamine, an alkanolamine, or an alkylamine. The pretreated polyester material to which affinity for acid type dyes has been imparted is also claimed as a part of the invention, as is the thus acid-dyed pretreated polyester material.