3/10/2024 0 Comments Formula viscosidade cinemáticaTitle (English): COMPOSITION OF LUBRICATING OIL FOR AUTOMATIC TRANSMISSIONS The gear precision grinding oil of the present invention causes little harm to the environment and the human body, has good lubrication performance, high anti-rust and anti-corrosion performance, and can reduce workpiece machining precision. The preparation method for the gear precision grinding oil comprises the following steps: loading the secondary hydrogenated paraffinic mineral oil and the antioxidant into a container, raising the temperature to 40☌-50☌, and stirring until transparent stopping heating, loading the sulfurized fatty acid ester and the polymer polyisobutylene into the container, and stirring until transparent loading the pentaerythritol oleate and the high-alkalinity calcium sulfonate into the container, and stirring until transparent filtering the liquid in the container, and taking the filtrate, to obtain the gear precision grinding oil. The gear precision grinding oil comprises the following components: a secondary hydrogenated paraffinic mineral oil, a pentaerythritol oleate, a high-alkalinity calcium sulfonate, a sulfurized fatty acid ester, a polymer polyisobutylene and an antioxidant. Publication/Patent Number: WO2023024366A1Ībstract: The present invention relates to the technical field of grinding oil, in particular to a gear precision grinding oil and a preparation method therefor. Abstract: To provide grease base oil with excellent heat resistance and low-temperature storability, containing a condensed ester, and a grease composition containing the grease base oil.SOLUTION: The grease base oil contains a condensed ester of an alcohol (A) and a carboxylic acid (B), wherein the alcohol (A) contains a polyhydric alcohol represented by formula (1) and the carboxylic acid (B) contains a 5 to 9C aliphatic acid (B-1), a 15 to 20C branched aliphatic acid (B-2), a 4 to 8C cycloalkane monocarboxylic acid (B-3), and an aromatic carboxylic acid (B-4), with the ratio of (B-1) being not lower than 30 mol% and not higher than 50 mol%, the ratio of (B-2) being not lower than 30 mol% and not higher than 50 mol%, the ratio of (B-3) being not lower than 10 mol% and not higher than 30 mol%, and the ratio of (B-4) being not lower than 1 mol% and not higher than 15 mol%, in the carboxylic acid (B).SELECTED DRAWING: None
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