Method for cold rolling metals using an aqueous lubricant...

C - Chemistry – Metallurgy – 10 – M

Patent

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Details

C10M 173/02 (2006.01) C10M 129/26 (2006.01) C10M 139/00 (2006.01) C10M 171/06 (2006.01)

Patent

CA 2437601

The invention concerns a method for cold rolling metals using an aqueous lubricant comprising: (1) at least a mixture based on at least an acid selected among saturated or unsaturated mono- or poly-carboxylic acids, comprising 5 to 40 carbon atoms; at least an acid phosphate ester of formula (RO)¿x?-P(=O)(OH)¿x'?, wherein: R is a hydrocarbon radical, optionally polyalkoxylated; x and x' being equal to 3; the carboxylic acid and/or the acid phosphate ester being optionally neutralised by an organic or mineral base; and (2) at least a natural or synthetic wax exhibiting a melting point not less than 50 ·C and having an average particle size ranging between 0.5 and 10 µm. The use of said lubricant enables to increase the productivity of the method by at least 15 % relative to a method using a conventional lubricant.

La présente invention a pour objet un procédé de laminage à froid de métaux mettant en oeuvre un lubrifiant aqueux comprenant (1) au moins un mélange à base d'au moins un acide choisi parmi les acides mono- ou poly-carboxyliques, saturés ou non, comprenant 5 à 40 atomes de carbone; d'au moins un ester phosphate acide de formule (RO)¿x?-P(=O)(OH)¿x'?, formule dans laquelle R est un radical hydrocarboné, éventuellement polyalcoxylé, x et x' étant égaux à 1 ou 2, à la condition que la somme de x et x' soit égale à 3; l'acide carboxylique et/ou l'ester phosphate acide étant éventuellement neutralisé(s) par une base organique ou minérale; et (2) au moins une cire naturelle ou synthétique présentant un point de fusion supérieur ou égal à 50 ·C et présentant une taille moyenne de particules comprise entre 0,5-10 µm. La mise en oeuvre de ce lubrifiant permet d'augmenter la productivité du procédé d'au moins 15 % par rapport à un procédé mettant en oeuvre un lubrifiant classique.

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