Abstract: The invention relates to a process for the phosphatization of metallic substrates comprising the use of a phosphatization bath having a pH from 1 to 5.5 and which comprises from about 0.3 to about 25 g/l of zinc ion, preferably from 0.5 to 10 g/l, from 5 to about 50 g/l of phosphate ion, preferably from 8 to 30 g/l, and from about 0.01 to about 10 g/l, preferably from 0.03 to 3 g/l of a trivalent cobalt complex.
Type:
Grant
Filed:
September 2, 1997
Date of Patent:
May 30, 2000
Assignee:
CFPI Industries
Inventors:
Joseph Schapira, Patrick Droniou, Michel Sudour, Michele Guimon, Daniel Bernard
Abstract: The invention relates to a composition, which is simultaneously anticlumping and water-repellent, for salts, simple and complex fertilizers. This composition contains:on the one hand, an anticlumping product chosen from fatty amines, amine salts of phosphoric esters, amine salts of alkylarylsulphonic acids and mixtures thereof, andon the other hand, an anticlumping substance capable of imparting water-repellent properties and consisting of the product of the reaction of an alcohol or an amine with a carboxylic acid or anhydride bearing a hydrocarbon group having from 20 to 500 carbon atoms,as well as a formulation agent.
Type:
Grant
Filed:
September 25, 1995
Date of Patent:
December 16, 1997
Assignee:
CFPI Industries
Inventors:
Joseph Schapira, Jean-Claude Cheminaud, Pascal Petitbon, Dominique Imbert