C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
C10M 157/00 (2006.01) C10M 143/02 (2006.01) C10M 143/04 (2006.01) C10M 143/10 (2006.01)
Patent
CA 2640288
Process for the preparation of viscosity index improver (V.I.I.) additives of lubricating oils which comprises a mixing treatment under high shear conditions of a composition comprising: (i) one or more EP(D)M polymers (ii) one or more polyvinylarene/ conjugated hydrogenated polydiene/polyvinylarene block copolymers; and (iii) lubricating oil, (ii) being present in a concentration of 1.5 to 20% by weight whereas (iii) is present in a concentration ranging from 1.5 to 45% by weight.
La présente invention a pour objet un procédé d'élaboration d'additifs améliorant l'indice de viscosité (VII, viscosity index improver) des huiles lubrifiantes qui comprend un traitement sous agitation dans des conditions de cisaillement élevées d'une formule comprenant : (i) un ou plusieurs polymères EP(D)M (ii) un ou plusieurs copolymères bloc polyvinylarène/polydiène hydrogéné conjugué/polyvinylarène ; et (iii) une huile lubrifiante, (ii) étant présent à une concentration comprise entre 1,5 et 20 % en poids, tandis que (iii) est présent à une concentration comprise entre 1,5 et 45 % en poids.
Polimeri Europa S.p.a.
Robic
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