(19)
(11) EP 0 385 728 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
16.01.1991 Bulletin 1991/03

(43) Date of publication A2:
05.09.1990 Bulletin 1990/36

(21) Application number: 90302083.2

(22) Date of filing: 27.02.1990
(51) International Patent Classification (IPC)5C10M 157/00
// (C10M157/00, 143:02, 143:12, 145:12, 145:14, 145:16), C10N30:02
(84) Designated Contracting States:
BE DE FR GB IT NL

(30) Priority: 28.02.1989 US 316624

(71) Applicant: EXXON CHEMICAL PATENTS INC.
Florham Park New Jersey 07932 (US)

(72) Inventors:
  • Rossi, Albert
    Warren, New Jersey 07060 (US)
  • Rosental, Celio
    Flamengo, Rio de Janeiro, Rio de Janeiro (BR)

(74) Representative: Northover, Robert Frank et al
Exxon Chemical Limited Exxon Chemical Technology Centre PO Box 1
Abingdon Oxfordshire, OX13 6BB
Abingdon Oxfordshire, OX13 6BB (GB)


(56) References cited: : 
   
       


    (54) C14 carboxylate polymer and viscosity index improver containing oleaginous compositions


    (57) A lubricating oil composition exhibiting improved low temperature flow properties and viscometric properties comprising lubricating oil and

    (i) an amount effective to improve the low temperature flow properties of said lubrica­ting oil composition of additive consisting essentially of at least one low molecular weight polymer or interpolymer of unsaturated carboxy ester represented by the formula

    wherein R′ is selected from the group consist­ing of hydrogen and COOR, and R is a C₁₄ alkyl group; and

    (ii) an amount effective to improve the viscosity index of said lubricating oil composition of additive comprising hydrocarbon polymeric viscosity index improver.







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