Kukdong Jeyen Company Limited

Hyundai Motor Company

Kia Motors Corporation

Kd Finechem Co. Ltd.

Chang Yeol Jo

Sung Wook Na

Jae Yoon Park

Hong Ki Lee

Dong Yeol Choi

Young Joo Ha

Hun-Woo Park

Jae Yoon; Park

The present invention relates to a vehicle-glass cleaning fluid composition comprising an alcohol, an anionic surfactant, and tartaric acid as a corrosion inhibitor. The present invention provides a cleaning fluid composition entailing improved metal corrosion prevention, durability for rubbers and plastics, and performance in preventing the noise and wear which occur when there is friction between a wiper blade and glass surface. The cleaning fluid composition of the present invention has outstanding corrosion-preventing properties while also substantially improving test-piece weight-change reduction and abnormal appearance changes, and has a highly outstanding performance in preventing noise and wear due to friction.

Vehicle-glass cleaning fluid composition comprising anionic surfactant and tartaric acid

The present invention relates to a composition for an antifreeze liquid or a coolant. The present invention provides the composition for the antifreeze liquid or the coolant comprising: (a) a glycol-based antifreeze agent; (b) a cyclo hexane dicarboxylic acid; and (c) a non-reduced polyol. Generally, a mixture of mono- or dicarboxylic acid, which is used as a corrosion inhibitor agent, and an inorganic additive is prone to cavitation erosion and corrosion of gaps, but when a composition is comprised by using in parallel the cyclo hexane dicarboxylic acid and the non-reduced polyol, a synergy effect is created, thereby exhibiting a superior corrosion prevention effect with respect to cavitation erosion and corrosion of gaps inside a cooling apparatus.

Composition for antifreeze liquid or coolant having superior cavitation erosion- and gap corrosion-resistance effect

A composition for the antifireeze liquid or the coolant includes a cyclo hexane dicarboxylic acid, an azole- or thiazole-based inhibitor, and a metal from an element of group 2, group 5, group 6, or group 7. The composition of the present invention has increased corrosion resistance at a lower density by not containing organic additives, and has a better pH buffering property due to enhanced thermal oxidation stability at a high temperature. Even after a long-term operation for over 200000 km, the composition of the present invention maintains a metal corrosion resistance capability, the appearance of a water pump impeller and the inside of a radiator tube including aluminum remains decent, and the composition has a superior corrosion resistance effect with respect to internal metal parts even after an operational test, thereby allowing use of the composition for the antifreeze liquid or the coolant having a long life.

Composition having enhanced corrosion resistance and pH buffering property for antifreeze liquid or coolant

The present invention relates to a brake fluid composition comprising (a) a glycol compound and boron-containing compound mixture as solvents, (b) corrosion inhibitior, (c) and tartatric acid, imidazole or a mixture of tartaric acid and imidazole as antioxidants. Provided is a brake fluid composition having improved capabilities for inhibiting thermal oxidation, metallic and high-temperature corrosion. The brake fluid composition according to the present invention significantly improves long-term durability by reducing metal dot corrosion and preventing boronic acid precipitation on a test piece, while having a superior thermal oxidation inhibition capability, and has superior capabilities for inhibiting high-temperature oxidation and corrosion while having negligible effects on the equilibrium reflux boiling point and the wet equilibrium reflux boiling point.

Brake fluid composition comprising tartaric acid and imidazole

The present invention relates to a brake fluid composition comprising a glycol compound as a solvent, and triazole, thiadiazole mixture, and antioxidant as metallic corrosion inhibitors. Provided is a brake fluid composition having improved long-term metallic and high-temperature corrosion inhibition. The brake fluid composition according to the present invention significantly improves long-term durability by being a superior anti-corrosive as well as having a reduced weight variation on a test piece, and has a superior high-temperature corrosion inhibition while having negligible effects on the equilibrium reflux boiling point and the wet equilibrium reflux boiling point.

Brake fluid composition comprising triazole and thiadiazole

A coolant composition for a fuel cell, including (a) an alkylene glycol, (b) deionized water, and (c) a compound containing a trimethylsilyl group. The compound containing a trimethylsilyl group of the composition of the present invention prevents the oxidation of the alkylene glycol, and thus the generation of an acid is 700 ppm or less. Additionally, the compound prevent the oxidation of the alkylene glycol, thereby inhibiting the generation of an ionic material, and thus the rate of change of electrical conductivity (conductivity after oxidation/initial conductivity) can be maintained to be 40 times or less. Therefore, the coolant composition for a fuel cell of the present invention can be used as a coolant for a cooling system of a fuel cell driving device with an electrical conductivity of 40 &#x3bc;s/cm or less even without being frozen in the winter.

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Busan, South Korea

Chang Yeol Jo