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. 10, 1989
Filed:
Feb. 05, 1988
Walter K Bornack, Jr, Amherst, NY (US);
Keith R McNally, Bedminster, NJ (US);
Union Camp Corporation, Wayne, NJ (US);
Abstract
The present invention comprises a water dispersible polyamide ester useful in flexographic ink formulations and Cold Seal Release Lacquers. A high AV polyamide is reacted with a polyol to increase molecular weight via ester formation. The polyamide ester is then reacted with a cyclic carboxylic anhydride. A general formula for the product resin is as follows: ##STR1## wherein x is an integer of 1-5; R'=a polyamide ester chain of molecular weight 500-2000; where y is an integer of 1-3; R.sup.2 is independently at each occurrence the residue of a cyclic carboxylic anhydride bearing at least one free carboxyl group or ##STR2## where R.sup.3 is independently at each occurrence R' or a polyamide segment of up to 2000 MW.