Oil-in-water emulsion comprising at least one lubricating additive
AssigneeUnisor
InventorsHervé Derule, Hubert Jacobs, Amadou Dicko, Peggy Guinet
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Abstract
An emulsion used to lubricate the surface of a steel sheet, comprising an additive corresponding to one of the following formulae: (R1-2—O—)1-2—PSS—(CH2)n—COO—(CH2)m—CH3, (R1-2—O—)1,2—PSS—CH2-φ-O—H, (R1,2—O—)1,2—PSS—CH2-φ-O—(CH2)n, —COO—(CH2)m, —CH3, where PSS designates a dithiophosphate function. The naked sheets of steel that are treated with said emulsion have very good tribological properties even when the density of the emulsion thus applied is less than or equal to 1 g/m2 when dry. The invention enables dry-looking oiled sheets to be obtained, whereby no re-oiling is required before forming even by die stamping.
Claims11
An oil-in-water emulsion intended for a lubrication treatment of a steel surface, containing at least one lubrication additive chosen from the group comprising the products corresponding to the following formulae:
- (R1,2—O—)1,2—PSS—(CH2)n—COO—(CH2)m—CH3 with n and m chosen so that n+m≧22;
- (R1,2—O—)1,2—PSS—CH2-Φ-OH, or hydroxybenzyl O,O′-dialkyl dithiophosphates;
- (R1,2—O—)1,2—PSS—CH2-Φ-O—(CH2)n′—COO—(CH2)m′—CH3 with n′ and m′ having any value,
- where PSS denotes the dithiophosphate functional group, (R1,2—O—)1,2— denotes O,O′-dialkyl terminal groups, —CH2-Φ-OH denotes the hydroxybenzyl functional group and —CH2-Φ-O— the benzyloxy functional group.
Dependencies are inferred from the claim text.