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:
Oct. 13, 1987
Filed:
Mar. 09, 1983
Bobby J Bailey, Candler, NC (US);
Akzona Incorporated, New York, NY (US);
Abstract
A new and useful indigo-dyeable polyester is disclosed, and process for making same, for which a suitable polyester has had applied to its surface an amount of a suitable indigo dye retaining compound effective to provide said polyester with indigo fastness properties similar to cotton. The new indigo dyeable polyester may be employed in the manufacture of a staple material blended with cotton in predetermined amounts depending on the end use desired, e.g., 50:50 by weight for cotton denims (e.g., jeans). Preferable indigo dye retaining compounds comprise monomers dioleylamine and dicocoamine. Other suitable indigo dye retaining monomers are disclosed, inter alia, having the formula: ##STR1## wherein R.sub.1 is alkyl or alkenyl of about 10-18 carbons; R.sub.2 is alkyl, alkylaryl, or alkenyl of about 8-18 carbons, R--CH.sub.2 --NO.sub.2, R--CH.dbd.NH, where R is alkyl or alkenyl from one to eighteen carbons; and R.sub.3 is hydrogen or alkyl from one to about twelve carbons. A process is also disclosed for treating a meltspun suitable polyester fiber with an amount (e.g., about 0.25%-2.0% by weight) of a suitable indigo dye retaining compound effective to provide said polyester fiber with indigo fastness properties similar to cotton.