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:
Feb. 03, 1976
Filed:
Jun. 14, 1973
Henry L King, Cary, NC (US);
John W McGee, Cary, NC (US);
Monsanto Company, St. Louis, MO (US);
Abstract
Glycol solutions of a bis glycol ester of a difunctional aromatic compound possessing one or more metallo sulfonate groups suitable for use in continuous or non-continuous preparation of fiber-forming cationic dyeable copolyesters by copolymerization with a low molecular weight glycol-dicarboxylic acid prepolymer are prepared by reacting the dimethyl ester of a metallo sulfo dicarboxylic acid with glycol at a mole ratio of about 4-30 of the glycol to 1 of the dimethyl ester, under ester interchange conditions so as to provide a solution of the bis glycol ester of the metallo sulfo dicarboxylic acid in glycol containing about 20-75% of the bis glycol ester having a carboxyl plus carboxylate content of not more than about 200.mu.eq/g of bis glycol ester, and no more than about 10 weight percent of glycol ether based on bis glycol ester. A conventional ester interchange catalyst and glycol ether suppressant may be employed.