COOLANT COMPOSITION AND METHOD FOR OPERATING INTERNAL COMBUSTION ENGINE USING THE SAME

• Main Authors: NAKANO TOMOYUKI, YAEDA KAZUTO, OGURA SHINICHI, KAMENOUE SHOGO, NAGASAWA MASAYUKI, KODAMA YASURO, MIYAJIMA KAZUHIRO, MAKINO RYOTA, YOSHII YOICHIRO
• Format: Patent
• Language: English; Japanese
• Published: 11.07.2016
• Subjects: ADHESIVES; BLASTING; CHEMISTRY; COOLING OF INTERNAL-COMBUSTION ENGINES; COOLING OF MACHINES OR ENGINES IN GENERAL; DYES; ENGINE PLANTS IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MECHANICAL ENGINEERING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES; STEAM ENGINES; WEAPONS

PROBLEM TO BE SOLVED: To provide a coolant composition that can enhance a fuel consumption effect of an internal combustion engine and to provide a method for operating an internal combustion engine using the coolant composition.SOLUTION: The coolant composition comprises a viscosity characteristics modifier, at least one kind of alkali metal compound selected from an alkali metal salt and an alkali metal hydroxide, and a base agent. The viscosity characteristics modifier is a compound represented by formula (1) and the base agent comprises at least one kind of alcohol selected from monohydric alcohol, dihydric alcohol, trihydric alcohol and glycol monoalkyl ether and water. The coolant composition has a kinematic viscosity at 25°C of 8.5 mm/s or more and a kinematic viscosity at 100°C of 2.0 mm/s or less. Formula (1): RO-(RO)-SOM [Ris a linear/branched-chain 16-24C alkyl group or alkenyl group; Ris an ethylene group or a propylene group; m represents an average addition molar number of RO and is a number of 0.5 to 10; and M is a cationic ion or a hydrogen atom]SELECTED DRAWING: Figure 1 【課題】内燃機関の燃費効果を向上させることができる冷却液組成物及びこれを用いた内燃機関の運転方法の提供。【解決手段】粘度特性改良剤、アルカリ金属塩、アルカリ金属水酸化物から選ばれる少なくとも１種のアルカリ金属化合物、基剤を含有する冷却液組成物であって、粘度特性改良剤が、式（１）で表される化合物であり、基剤が、一価、二価、三価アルコール又はグリコールモノアルキルエーテルから選ばれる少なくとも１種のアルコール類、水からなり、動粘度が、２５℃で８．５ｍｍ２／秒以上であり、かつ１００℃で２．０ｍｍ２／秒以下である、冷却液組成物に関する。Ｒ１Ｏ−（Ｒ２Ｏ）ｍ−ＳＯ３Ｍ（１）［Ｒ１は直鎖／分岐鎖状のＣ１６〜２４のアルキル基又はアルケニル基；Ｒ２はエチレン基又はプロピレン基；ｍはＲ２Ｏの平均付加モル数を示し、０．５〜１０の数；Ｍは陽イオン又は水素原子］【選択図】図１