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Title:
ENGINE COOLANT COMPOSITION FOR AUTOMOBILE, CONCENTRATED ENGINE COOLANT COMPOSITION FOR AUTOMOBILE AND OPERATION METHOD OF INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2017226800
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an engine coolant composition for an automobile, which has a specific kinematic viscosity by an appropriate thickening effect of a surfactant as a viscosity characteristic improving agent and which suppresses foaming property of the surfactant, and a concentrated engine coolant composition for an automobile for obtaining the above composition.SOLUTION: The engine coolant composition for an automobile comprises the following components: (A) a silicone-based oil compound; (B) a polyether-modified silicone; (C) non-silicone-based surfactant; and (D) a base agent. The silicone-based oil compound (A) comprises the following components: (A1) at least one compound selected from organopolysiloxane represented by general formula (1) below; and (A2) a filler. The polyether-modified silicone (B) is at least one compound selected from polyoxyalkylene-modified organopolysiloxane represented by general formula (2) below. The base agent comprises at least one alcohol selected from the group consisting of monohydric alcohol, dihydric alcohol, trihydric alcohol and glycol monoalkyl-ether, and/or water. The coolant composition has a kinematic viscosity of 8.5 mm/sec or more at 25°C and 2.0 mm/sec or less at 100°C.SELECTED DRAWING: None

Inventors:
KODAMA YASURO
SAKURAI TAKATO
YAEDA KAZUTO
YOSHII YOICHIRO
KISHINO YOSUKE
MAKINO RYOTA
NAGASAWA MASAYUKI
KAMENOUE SHOGO
Application Number:
JP2016125808A
Publication Date:
December 28, 2017
Filing Date:
June 24, 2016
Export Citation:
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Assignee:
TOYOTA MOTOR CORP
NIPPON CHEMICAL IND
SHINETSU CHEMICAL CO
KAO CORP
International Classes:
C09K5/10; B01D19/04; C09K5/20
Domestic Patent References:
JP2014012831A2014-01-23
JP2014189737A2014-10-06
JP2015218234A2015-12-07
JPH02198603A1990-08-07
Foreign References:
WO2015041000A12015-03-26
Attorney, Agent or Firm:
Yusuke Hiraki
Satoshi Fujita
Naomi Shimamura
Hiroko Wada