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US 12,606,730 B2Granted
Coolant composition and concentrated coolant composition
AssigneesToyota Jidosha Kabushiki Kaisha, Japan Chemical Industries Co., Ltd.
InventorsYuya Kusano, Masao Watanabe, Taiki Nakamura, Takumi Otsubo, Yoichiro Yoshii, Nobukazu Takagi, Yu Sasaki
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Abstract
A coolant composition containing the following substances: a) an alcohol; b) water; c1) a triazole compound; c2) an imidazole compound; d) a phosphate ion; and e) a metasilicate.
Claims9
A coolant composition comprising:
- an alcohol;
- water;
- a triazole compound;
- an imidazole compound;
- a phosphate ion;
- and
- a metasilicate,
- wherein a ratio of a content of the imidazole compound to a content of the triazole compound is less than 0.1, wherein the coolant composition comprises:
- from 40 wt. % to 60 wt. % of the alcohol;
- from 40 wt. % to 60 wt. % of the water;
- from 0.05 wt. % to 0.5 wt. % of the triazole compound;
- from 0.0005 wt. % to 0.04 wt. % of the imidazole compound;
- from 0.0005 wt. % to 0.005 wt. % of the phosphate ion (in terms of P);
- and
- from 0.0005 wt. % to 0.005 wt. % of the metasilicate, on the basis of the total weight of the composition.
12 more elements
Dependencies are inferred from the claim text.