Global Patent Index - EP 1161513 A1

EP 1161513 A1 2001-12-12 - ENGINE OIL COMPOSITION WITH REDUCED DEPOSIT-FORMATION TENDENCY

Title (en)

ENGINE OIL COMPOSITION WITH REDUCED DEPOSIT-FORMATION TENDENCY

Title (de)

MOTORENÖLZUSAMMENSETZUNG MIT REDUZIERTER NEIGUNG ZUR BILDUNG VON ABLAGERUNGEN

Title (fr)

COMPOSITION D'HUILE DE MOTEUR A TENDANCE REDUITE A LA FORMATION DE DEPOTS

Publication

EP 1161513 A1 (DE)

Application

EP 00916867 A

Priority

  • DE 19909401 A
  • EP 0001534 W

Abstract (en)

[origin: DE19909401A1] The invention relates to engine oil compositions with reduced deposit-formation tendency which contain between 0.05 and 10 % by weight, in relation to the total weight of the engine oil composition, of an alkyl alkoxylate of formula (I), in which R<1>, R<2> and R<3> independently are hydrogen or a hydrocarbon rest with up to 40 carbon atoms; R<4> is hydrogen, a methyl or ethyl rest; L is a linking group; n is a whole number between 4 and 40; A is an alkoxy group with between 2 and 25 recurring units derived from ethylene oxide, propylene oxide and/or butylene oxide and comprises homopolymers and statistical copolymers of at least two of the above compounds; and z is 1 or 2. The nonpolar part of compound (I) of the formula (II) contains at least 9 carbon atoms. The invention also relates to the preparation of such engine oils and to the use of alkyl alkoxylates of formula (I) for the reduction of deposit formation.

IPC 1-7 (main, further and additional classification)

C10M 145/36; C10M 133/08; C10M 133/16; C10M 145/38

IPC 8 full level (invention and additional information)

C10M 145/36 (2006.01); C10M 145/38 (2006.01)

CPC (invention and additional information)

C10M 145/38 (2013.01); C10M 145/28 (2013.01); C10M 145/30 (2013.01); C10M 145/32 (2013.01); C10M 145/34 (2013.01); C10M 145/36 (2013.01); C10M 2209/103 (2013.01); C10M 2209/104 (2013.01); C10M 2209/105 (2013.01); C10M 2209/106 (2013.01); C10M 2209/107 (2013.01); C10M 2209/108 (2013.01); C10M 2209/109 (2013.01); C10M 2215/042 (2013.01); C10M 2215/22 (2013.01); C10M 2215/221 (2013.01); C10M 2215/225 (2013.01); C10M 2215/226 (2013.01); C10M 2215/30 (2013.01); C10M 2221/043 (2013.01); C10N 2240/10 (2013.01); C10N 2240/101 (2013.01); C10N 2240/102 (2013.01); C10N 2240/103 (2013.01); C10N 2240/104 (2013.01); C10N 2240/106 (2013.01); C10N 2270/02 (2013.01)

Citation (search report)

See references of WO 0052117A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

DE 19909401 A1 20000907; AU 3806400 A 20000921; BR 0008634 A 20011226; CA 2372458 A1 20000908; CA 2372458 C 20090728; CN 1252232 C 20060419; CN 1347444 A 20020501; EP 1161513 A1 20011212; JP 2002538266 A 20021112; KR 100454323 B1 20041026; US 6458750 B1 20021001; WO 0052117 A1 20000908

INPADOC legal status


2008-12-31 [18R] REFUSED

- Effective date: 20080828

2007-11-07 [RAP1] TRANSFER OF RIGHTS OF AN APPLICATION

- Owner name: EVONIK ROHMAX ADDITIVES GMBH

2003-03-19 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20030129

2001-12-12 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010714

2001-12-12 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-12-12 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Free text: AL;LT;LV;MK;RO;SI