The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 05, 2021
Filed:
Jun. 20, 2017
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Yasuaki Kodama, Toyota, JP;
Kazuhito Yaeda, Shizuoka, JP;
Yoichiro Yoshii, Shizuoka, JP;
Yosuke Kishino, Shizuoka, JP;
Tomoyuki Nakano, Shizuoka, JP;
Masayuki Nagasawa, Shizuoka, JP;
Shogo Kamenoue, Wakayama, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, unknown;
Abstract
An automotive engine coolant composition includes: a surfactant as a viscosity index improver; a rubber swelling inhibitor; and a base, in which the rubber swelling inhibitor is at least one selected from a compound expressed by a following formula (1) [in the formula, Ris hydrogen, a methyl group, or an ethyl group] and a compound expressed by a following formula (2) [in the formula, Ris hydrogen, a methyl group, or an ethyl group], the base includes at least one alcohol selected from the group consisting of a monohydric alcohol, a dihydric alcohol, a trihydric alcohol, and a glycol monoalkyl ether and/or water, a kinematic viscosity is 8.5 mm/s or more at 25° C., and a content of the rubber swelling inhibitor is 0.03 parts by mass or more and 0.9 parts by mass or less with respect to 100 parts by mass of the coolant composition.