Lubricant compositions with low HTHS for a given SAE viscosity grade

(19)

(11)

EP 2 077 316 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	21.12.2011 Bulletin 2011/51

(43)	Date of publication A2:
	08.07.2009 Bulletin 2009/28

(21)	Application number: 08105939.6

(22)	Date of filing: 04.12.2008

(51)

International Patent Classification (IPC):

C10M 143/10^(2006.01)
C10M 169/04^(2006.01)
C10N 40/25^(2006.01)

C10M 157/00^(2006.01)
C10N 30/02^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
	Designated Extension States:
	AL BA MK RS

(30)

Priority:

17.12.2007 US 957627

(71)	Applicant: Infineum International Limited
	Abingdon Oxfordshire OX13 6BB (GB)

(72)	Inventors:
	Chambard, Laurent Linden, NJ 07036 (US) Bansal, Jai Linden, NJ 07036 (US)

(74)	Representative: Goddard, Frances Anna et al
	PO Box 1 Milton Hill Abingdon, Oxfordshire OX13 6BB Abingdon, Oxfordshire OX13 6BB (GB)

(54)	Lubricant compositions with low HTHS for a given SAE viscosity grade

(57) A lubricant composition that exhibits low high temperature high shear viscosity is disclosed. The lubricant composition is made up of a first polymer having a kinematic viscosity ratio less than or equal to 0.25 and a shear stability index (SSI) equal to or greater than 20 percent and base oil having a viscosity index equal to or greater than 120.

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