C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
C10M 173/00 (2006.01) C10M 137/10 (2006.01)
Patent
CA 2360016
An emulsion used to lubricate the surface of a steel sheet, comprising an additive corresponding to one of the following formulae: (R¿1,2?-O-)¿1,2?-PSS-(CH¿2?)¿n?-COO-(CH¿2?)¿m?-CH¿3?, (R¿1,2?-O-)¿1,2?-PSS-CH2-~-O-H, (R¿1,2?-O-)¿1,2?-PSS-CH¿2?-~-O-(CH¿2?)¿n?,-COO-(CH¿2?)¿m?,-CH¿3?, 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 1g/m?2¿ when dry. The invention enables dry-looking oiled sheets to be obtained, whereby no re-oiling is required before forming even by die stamping.
Emulsion destinée à un traitement de lubrification d'une surface de tôle d'acier comprenant un additif répondant à l'une des formules suivantes : (R1,2- O-)1,2-PSS-(CH2)n-COO-(CH2)m-CH3, (R1,2-O-)1,2-PSS-CH2-~-O-H, (R1,2-O-)1,2-PSS- CH2-~-O-(CH2)n,-COO-(CH2)m,-CH3, où PSS désigne la fonction dithiophosphate. Les tôles d'acier nu traitées à l'aide de cette émulsion présentent de très bonnes propriétés tribologiques, même si la densité d'émulsion appliquée est inférieure ou égale à 1 g/m2 à l'état séché. On peut obtenir des tôles huilées d'aspect sec ne nécessitant aucun rehuilage avant mise en forme, même par emboutissage.
Derule Herve
Dicko Amadou
Guinet Peggy
Jacobs Hubert
Robic
Usinor
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