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:
May. 23, 1995
Filed:
Sep. 20, 1994
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
The present invention relates to a process for retanning chrome-tanned leather comprising applying to leather a reaction product of (a) at least one glycerol monoester of a saturated C.sub.12-18 monocarboxylic acid, (b) at least one diisocyanate selected from the group consisting of toluene diisocyanate, hexamethylene diisocyanate, and isophorone diisocyanate, and (c) dimethylolpropionic acid, wherein (i) the components (a), (b) and (c) are so selected that the molar ratio of the isocyanate groups of component (b) to the sum of the hydroxyl groups of components (a) plus (c) is about 0.5 to about 1.05 and (ii) the molar ratio of compound (c) to compound (a) is about 0.7 to about 1.5 and wherein (iii) the carboxyl groups originating from compound (c) are at least partly neutralized.