34 results about "Lithium 12-hydroxystearate" patented technology

The invention belongs to a composition of four-component lithium complex grease and a preparation method thereof. 12-lithium hydroxyl stearate, lithium azelaic acid or lithium sebacic acid, lithium boric acid and lithium salicylate are added into base oil. Four-component complex lithium prepared by controlling complex saponification temperature and time in a first step, alkali adding temperature in a second step, complex co-crystallization temperature and time and the highest temperature by a two-step saponification process has the advantages of high adhesion property, excellent high temperature leakage resistance, long high-temperature bearing service life, high comprehensive performance and capability of meeting the requirement of the lubricating of high-temperature environment equipment and high-temperature centralized pumping and lubricating. The lithium complex grease of the invention belongs to high-temperature grease of which the dropping point is not less than 260 DEG C and which has the prominent advantages of high adhesion property, excellent high temperature leakage resistance and long high-temperature bearing service life at the temperature of 160 DEG C. Compared with polyurea grease, the lithium complex grease cannot be hardened at a high temperature; and compared with the ordinary two-component or three-component complex lithium, the lithium complex grease has the advantages of high adhesion property, excellent high temperature leakage resistance and long high-temperature bearing service life.

The invention provides low-temperature lubricating grease and a preparation method thereof. The low-temperature lubricating grease comprises mineral oil, synthesized oil, fatty acid soap, an antioxidant and an antirust agent. Compared with the prior art, the low-temperature lubricating grease is characterized in that semi-synthesized oil obtained by mixing III-type oil and ester oil and / or PAO (poly alpha olefin) oil is used as basic oil; the III-type oil has a high viscosity index and is high in high-temperature and low-temperature performance, oxidation stability, heat stability and evaporation performance; the ester oil and the PAO oil also have high viscosity indexes and are high in low-temperature performance; moreover, a mixture of lithium stearate and 12-hydroxy lithium stearate is used as a thickening agent for thickening the semi-synthesized oil, so that the low-temperature lubricating grease is high in low-temperature performance, and a used component can be normally lubricated under low temperature; the applicable temperature range is large; furthermore, the thickening agent is easy to synthesize.

The present invention provides composite lithium-based lubricating grease and a preparation method thereof. The composite lithium-based lubricating grease consists of thickener, base oil and additive.The thickener consists of 12-hydroxy stearic acid lithium dibasic acid and / or lithium borate, and the mol ratio is 1 : 0.1 to 1 : 0.1to 1. The base oil is mineral oil or poly-alpha-olefin synthesis oil. The additive consists of organic amine compound antioxidant, benzotriazole and barium petroleum sulfonate or barium dinonylnaphthalene sulfonate anti-corrosion additive and rust protection agent,dialkyl dithiocarbamate or dibenzyl disulfide and sulfurized olefin cottonseed oil extreme pressure antiwear additive and nanometer copper powder repairing additive. The contents of the thickener andthe base oil are respectively 6 percent to 18 percent and 82 percent to 94 percent according to the weight percentage. The lubricating grease has the multi-effect performances of high dripping point,good high-temperature performance and low-temperature performance, chemical invariability, colloid invariability, antiwear extreme pressure performance etc., and especially has the repairing functiontowards a damaged bearing.

A hydroxy fatty acid salt having an average particle diameter of from 5 μm to 100 μm with a composition of from 0.3 wt % to 2 wt %, and more preferably, from 0.5 wt % to 2 wt % is added to a raw material powder in powder metallurgy, and worm molding is performed. In addition, a hydroxy fatty acid salt having an average particle diameter of 50 μm or less is attached on a mold in advance, and after that, the warm molding is performed. As a hydroxy fatty acid salt, 12-hydroxy lithium stearate is suitably used.

The invention relates to bearing lubricating grease comprising the following components of: (a) a compound thickening agent formed by lithium 12-hydroxystearate soap, lithium binary acid soap and lithium borate, (b) an additive, and (c) base oil, wherein the compound thickening agent is formed by soapnifying 12-hydroxystearic acid, binary acid and boric acid with lithium hydroxide; and the additive amount of the boric acid is 1-5 parts by weight while the weight of the base oil is 100 parts by weight, wherein the additive is one or combination of at least two of an antioxidant, an antirusting agent, an anti-wear reagent at extreme pressure and a metal passivator. The dropping point temperature of the bearing lubricating grease provided by the invention is more than or equal to 300 DEG C, and the bearing lubricating grease provided by the invention does not collapse or fade and has the characteristics of long service life, silence and high temperature resistance.