Single-lithium soap automotive grease and preparation method thereof
A technology for lubricating grease and soap truck, which is applied in the field of monolithic soap vehicle grease and its preparation, can solve the problems of high formulation cost, poor pumping performance, long production cycle, etc., so as to shorten the production cycle and improve the pumping performance. , the effect of reducing the cost of formulations
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[0040] The present invention also provides a preparation method of the above-mentioned monolithium soap grease. Firstly, the base oil is mixed with the fatty acid soap thickener to obtain a pre-mixture; After mixing, homogenizing or grinding, grease is obtained.
[0041] Preferably, the fatty acid soap thickener is obtained by reacting a fatty acid with a metal hydroxide, and the preparation method of the mixture includes the following steps: first mixing part of the base oil with the fatty acid to obtain a mixture; heating the mixture to 80-90°C Add metal hydroxide, react at 90-100°C for 0.5-2 hours, raise the temperature to 150-160°C, keep the temperature for 30 minutes, then raise the temperature to 200°C, add the remaining base oil and cool to obtain the pre-mixture.
Embodiment 1
[0052] 1200g of 500SN base oil and 300g of lauryl hydroxystearic acid were heated up to 90°C, and an aqueous solution of lithium hydroxide monohydrate (42g of lithium hydroxide monohydrate, 360g of water) was added to react at 100°C for 1 hour. Slowly raise the temperature to 150°C and keep it warm for 30 minutes. Rapidly raise the temperature to 200°C, add 1200g of 500SN base oil to cool. Continue to cool down to 90°C, add the following functional additives: 12g of N-phenyl-α-naphthylamine, 33g of zinc dialkyldithiophosphate, 120g of hydrogenated styrene-isoamyl copolymer, 33g of sulfurized olefin, 33g of borate, Benzotriazole 10g, mixed and homogenized by a homogenizer to obtain monolithium soap grease.
Embodiment 2
[0054] 1200g of 500SN base oil and 260g of hydrogenated castor oil were heated up to 85°C, and an aqueous solution of lithium hydroxide monohydrate (36.4g of lithium hydroxide monohydrate, 360g of water) was added, and reacted at 90°C for 1 hour. Slowly heat up to 155°C and keep warm for 50 minutes. Rapidly raise the temperature to 180°C, add 1200g of 500SN base oil to cool. Continue to cool down to 80°C, add the following functional additives: 7.2g diphenylamine, 12g zinc dialkyldithiophosphate, 70g polymer polyisobutylene, 24g aminothioester, 36g borate alkylammonium salt, phenylacrylic acid Azole 7g was mixed and ground on a three-roll mill to obtain monolithium soap grease.
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