Patent ID: 7524621
Filing Date: 2009-04-28
Classification: G03C

Abstract:
1. A method of forming a silver soap of a long chain carboxylic acid comprising: (A) preparing a dispersion of a long chain carboxylic acid in water, with no alkali or ammonia salt of said acid present in the dispersion while said long chain carboxylic acid is maintained above its melting point but below the boiling point of the dispersion; (B) converting a first portion of said long chain carboxylic acid to one or more alkali metal salts of said long chain carboxylic acid by the addition of one or more alkali metal hydroxides; (C) converting the remainder of said long chain carboxylic acid to one or more alkali metal salts of said long chain carboxylic acid by the addition of one or more alkali metal hydroxides; (D) cooling the dispersion, and thereafter; and (E) converting the mixture of said long chain alkali metal salts of said long chain carboxylic acid to a silver soap of said long chain carboxylic acid; so long as one of said alkali metal hydroxides in step (B) or (C) but not both is lithium hydroxide.