293results about How to "Good colloidal stability" patented technology

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 ®U 0.1 to 1 ®U 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 and the 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 function towards a damaged bearing.

The invention relates to a lubricating grease, comprising 40-95 wt% of a lubricating base oil, 1-59 wt% of a composite zirconium based densifier and 1-59 wt% of octapolyurea; and the composite zirconium based densifier is a compound zirconium soap generated from reaction of higher aliphatic acid, aromatic acid, water and zirconium alkoxide. The invention also relates to a preparation method of the lubricating grease. The method comprises the following steps: subjecting the zirconium alkoxide, higher aliphatic acid and aromatic acid to a first contact reaction in lubricating base oil at 60-120 DEG C; then subjecting the mixture obtained from the first contact reaction and water to a second contact reaction at 85-100 DEG C, and heating the products obtained from the second contact reaction for dehydration; and introducing the octapolyurea into the obtained reaction products. The lubricating grease provided by the invention has high drop point, excellent colloidal stability, and excellent extreme pressure wear resistance and ball bearing lubrication life.

The invention relates to a lubricating grease, comprising 40-95 wt% of a lubricating base oil, 1-59 wt% of a composite zirconium based densifier and 1-59 wt% of bipolyurea; and the composite zirconium based densifier is a compound zirconium soap generated from reaction of higher aliphatic acid, aromatic acid, water and zirconium alkoxide. The invention also relates to a preparation method of the lubricating grease. The method comprises the following steps: subjecting the zirconium alkoxide, higher aliphatic acid and aromatic acid to a first contact reaction in lubricating base oil at 60-120 DEG C; then subjecting the mixture obtained from the first contact reaction and water to a second contact reaction at 85-100 DEG C, and heating the products obtained from the second contact reaction for dehydration; and introducing the bipolyurea into the obtained reaction products. The lubricating grease provided by the invention has high drop point, excellent colloidal stability, and excellent extreme pressure wear resistance and ball bearing lubrication life.

The invention relates to complex lithium base grease and a preparation method thereof. The preparation method comprises the following processes of: adding 1/4 of base oil and dibasic organic acid into a reaction kettle, heating and melting, and adding monobasic organic acid for reaction; adding 1/4 of base oil, cooling the base oil, and adding lithium hydroxide oil solution for saponification andwarming; adding 1/4 of base oil, moving materials in the reaction kettle to an intermediate kettle, adding the rest 1/4 of base oil into the intermediate kettle, and circulating and cooling; adding an antioxidant, a corrosion inhibitor and an extreme pressure antiwear additive; and uniformly stirring, homogenizing and degassing to obtain the complex lithium base grease. The complex lithium base grease has a simple process, the time for producing the complex lithium base grease with a normal-pressure kettle is short, energy resources are saved, production cost is reduced, the utilization rate of equipment is improved, and the saponification reaction is quick and full.

The invention discloses insulating and heat-conducting silicone grease. The insulating and heat-conducting silicone grease consists of the following raw materials in parts by weight: 10-40 parts of organic silicon oil, 50-80 parts of heat-conducting powder, 0.5-4 parts of a structure improver, 0.5-3 parts of rheological aid, 0.5-5 parts of a friction modifier and 0.1-2 parts of an antioxidant. The insulating and heat-conducting silicone grease prepared by the invention is excellent in heat-conducting performance and low in cost, and is widely applicable to heat radiators requiring effective cooling in the industry, such as heat transmission for a gap where a diode and a substrate (aluminum or copper plate) are in contact, and heat conduction and insulation of a rectifier, electric and the like.

The invention discloses lithium-based lubricating grease and a preparation method thereof. The lithium-based lubricating grease is characterized by being prepared from the following components on the basis of the weight of the lubricating grease: 65-95% of lubricating base oil, 6-20% of lithium-based thickening agent and 0.5-15% of graphene. The lithium-based lubricating grease has excellent properties such as excellent high temperature resistance, water and adhesion resistance, colloidal stability, extreme pressure antiwear property, long lubricating service life, corrosion resistance and salt mist resistance.

The invention relates to an anti-rust extreme pressure lithium lubricating grease composition and a preparation method thereof. The composition is prepared from 5.5%-12.5% of thickening agents, 72.8%-91.3% of base oil, 0.5%-3.8% of extreme pressure anti-wear agents, 0.28%-1.25% of antioxidants and 0.02%-1.05% of anti-rust anti-corrosion agents, wherein the base oil is high-viscosity mineral oil. The preparation method of the composition comprises the steps that one third of the base oil and 12-hydroxy stearin or a mixture of 12-hydroxy stearin and stearic acid are heated to the temperature ranging from 60 DEG C to 80 DEG C, a lithium hydroxide solution is added, the temperature is raised to range from 180 DEG C to 220 DEG C after a reaction is completed, one third of quenching oil is added, the extreme pressure anti-wear agents, the anti-rust anti-corrosion agents and the rest of the base oil are added after cooling is conducted, and the composition is prepared after grounding is conducted. The novel lubricating grease containing the extreme pressure components and the anti-rust anti-corrosion components has the excellent extreme pressure property and anti-corrosion property and can be widely applied to severer environment conditions with a medium or heavy load and water.

The invention discloses a compound lithium base grease composite, which comprises the following materials in percentage by weight: 70-89% of grease base oil, 10-25% of densifier, 0.02-2% of additive, and 0.01-5% of bismuth oxide. In the compound lithium base grease composite, micron-level bismuth oxide powder is added as an extreme-pressure additive, and the prepared compound lithium base grease composite has good colloidal stability and mechanical stability, and better high temperature performance and extreme pressure resisting performance.

The invention discloses a lubricating grease composition and a preparation method of the lubricating grease composition. The lubricating grease composition consists of the following materials by weight: 70-85% of lubricating grease base oil, 12-27% of a double thickening agent and 0.1-3% of an additive, wherein the lubricating grease base oil is silicone oil. The preparation method adopts silicone oil with good high-temperature and low-temperature performance as the lubricating grease base oil, is simple in process, and effectively reduces the energy consumption relative to a two-step method.In the lubricating grease composition of the invention, nano-SiO4 is used as a thickening agent and the additive simultaneously. The additive also comprises such solid additives as an antioxidant, a rust protection agent and the like. The lubricating grease composition of the invention has good colloid stability, mechanical stability and high and low temperature performance, and can be suitable for an extreme operating condition.

The invention discloses composite sodium-based lubricating grease and a preparation method thereof. By the weight of the lubricating grease, the compound sodium-based lubricating grease comprises the following components: 65-95% of lubricating base oil, 5-30% of a composite sodium-based thickener and 0.2-15% of graphene. The composite sodium-based lubricating grease disclosed by the invention has excellent properties such as high temperature resistance, water resistance, adhesivity, colloid stability, extreme pressure antiwear property, long lubricating life, corrosion resistance and salt fog resistance.

The invention relates a speed reducer lubricating grease composition and a preparation method thereof. The composition comprises 69 to 80 percent of mineral base oil, 12 to 23 percent of ester base oil, 3.2 to 6 percent of thickening agent, 0.6 to 2 percent of dinonyl sulfonate or zinc naphthenate, and 1 to 2.8 percent of solid wear-resistance additive. The preparation method comprises: adding the mineral base oil into a reaction kettle, adding fatty acid, mixing, raising temperature to 80 to 85 DEG C, adding an aqueous solution of lithium hydroxide, heating to 90 to 100 DEG C, and performingsaponification for 1 to 2 hours; raising temperature to 210 DEG C, adding the mineral base oil into the reaction kettle, and quenching, wherein the quenching temperature is kept between 140 to 190 DEG C, and the quenching oil accounts for 14 to 43 percent of the total amount of the base oil; adding the ester base oil, and cooling; when the temperature is below 100 DEG C, adding the dinonyl sulfonate or zinc naphthenate, cooling to a temperature below 80 DEG C, and adding the solid wear-resistance additive; and cooling to a temperature below 60 DEG C, rolling oil by a three-roll machine for three times and filling to obtain finished speed reducer lubricating grease composition. In the invention, the lubricating grease is prepared by one-step direct reaction, the process and equipment are simple and energy-saving, and the quality of the product produced by the process is stable.

The invention discloses grease special for plastic and a preparation method thereof. The grease comprises the following components: organopolysiloxane, an additive, a heat stabilizer, a colloid stabilizer and a thickener, wherein the additive improves lubrication of dropping points and interfaces. The grease not only has the performance of common grease, but also has the advantages of stable colloid stability, strong high temperature resistance, and a special plastic protective function.

The invention provides lithium base grease and a preparation method thereof. The lithium base grease comprises a lubricating base oil, a lithium base thickener and a phosphorous compound, and a structure of the phosphorous compound is described in the specification. The lithium base grease has excellent biodegradability, colloid stability, mechanical stability and oxidation resistance, is suitablefor severe working conditions such as high temperature, high speed, high load, wateriness, and is environmental-friendly.

The invention discloses functional urea-based lubricating grease and a preparation method thereof. According to the functional urea-based lubricating grease, furfural refined oil of naphthenic crude oil is used as lubricating grease base oil, and a substance synthesized by the reaction of organic amine mixture and diisocyanate is used as urea-based thickening agent; and the functional urea-based lubricating grease composition also comprises at least one of the following additives: antioxidant and pigment. Because the furfural refined oil of a mineral source is used as the base oil, the urea-based lubricating grease has good anti-oxidation property and high colloid stability; and meanwhile, the addition of oxidant improves the oxidation stability of the urea-based lubricating grease and the addition of a little amount of pigment endows the urea-based lubricating grease with special appearance. In the preparation method of the invention, the initial reaction temperature of the thickening agent is controlled to be between 60 and 100 DEG C, so the energy consumption is effectively reduced.

The invention relates to thixotropic optical fiber filling paste for a ribbon optical cable, which mainly comprises base oil, an oil separation inhibitor, a pour point depressant, an antioxidant, an organic gelling agent, an inorganic gelling agent and a thixotropic agent. The invention also provides a preparation method for the thixotropic optical fiber filling paste for the ribbon optical cable. The thixotropic optical fiber filling paste for the ribbon optical cable is mainly characterized in that: the thixotropic optical fiber filling paste has excellent colloid stability and oxidation stability, heat resistance, weather resistance, non separation of oil in a system, low acid value, high thixotropic index, high water resistance, no emulsification, good high-temperature trickle-down property, high temperature resistance and low temperature resistance, is mainly used to be filled in a loose tube of the ribbon optical cable so as to prevent water or other fluid from flowing into or moving into the optical cable, and provides excellent effects of resisting water, buffering and the like for the optical cable.