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:
Jan. 04, 1977
Filed:
Mar. 19, 1975
Applicant:
Inventors:
Murty S Tanikella, Newark, DE (US);
Odorich VON Susani, Geneva, CH;
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
260 / ; 260 77 ;
Abstract
Textile fibers or filaments having improved dyeability are prepared from linear polyesters modified with a minor proportion of 2,2,6,6,-tetramethylpiperidine groups attached in the polymer chain through oxyalkylene linkages at the 1 and 4 positions of the piperidine ring. Alkylene oxide condensates of 2,2,6,6,-tetramethylpiperidine glycols are shown to have adequate heat-stability and compatibility for incorporating in polyesters under conditions of condensation polymerization to form modified polyesters suitable for melt-spinning into desirable products.