7results about How to "Good fluidity at low temperature" patented technology

This application belongs to the technical field of grouting materials for tunnel engineering, specifically relating to a grouting material suitable for tunnel rock strata reinforcement and its preparation method. It includes component A and component B; by weight, component A comprises: 75-85 parts of a first base material, 10-20 parts of a coupling agent, and 2-5 parts of a catalyst; component B comprises: 70-80 parts of a second base material and 15-25 parts of a modifying accelerator; wherein, the first base material is a water glass solution, and the physicochemical properties of the water glass solution meet the following conditions: modulus > 2.5, Baume degree < 40°Bé; the second base material is composed of isocyanate compounds and glycidyl etheroxypropyl cage-like polysilsesquioxane in a weight ratio of 100:(11-23); the modifying accelerator includes polyvinylpyrrolidone and dicarboxylic acid alkyl ester compounds. The two base materials synergistically cure at low temperature to form a highly cross-linked organic-inorganic composite network, thereby significantly improving the compressive strength of the solidified body.

The invention provides a random polymerized metallocene compound as well as a preparation method and application thereof. The random polymerized metallocene compound has a structure as shown in a formula I, wherein R is selected from H, benzene and derivatives thereof; x is selected from halogen, C1-C30 alkyl groups and derivatives thereof, C1-C6 alkoxy groups and derivatives thereof, C2-C30 dialkyl amino groups and derivatives thereof, and C2-C10 alkenyl groups and derivatives thereof; m is a transition metal element. The random polymerized metallocene compound is high in catalytic activity and is used for preparing high-viscosity mPAO base oil, and the prepared product has excellent low-temperature flowing property.

The present application relates to the technical field of lubricating oil, and particularly relates to a special lubricating oil composition for gear box of port machinery equipment and a preparation method thereof.The preparation method of the present application comprises the following steps: preparing a graphene oxide lubricating additive by using graphene oxide and part of base oil; stirring uniformly extreme pressure anti-wear agent, rust inhibitor, antioxidant, demulsifier, pour point depressant, viscosity index modifier and the remaining part of base oil, then adding the graphene oxide lubricating additive and anti-foaming agent, continuing to stir and mixing uniformly to obtain the special lubricating oil composition for gear box of port machinery equipment.The lubricating oil composition prepared by the preparation method of the present application has excellent load-carrying and anti-wear performance, unique anti-micro-pitting performance, excellent oxidation resistance, low-temperature fluidity and water separation performance and the like, and is suitable for gear box lubrication working under harsh working conditions such as heavy load, impact load and low-temperature environment.

The invention discloses a preparation process of vegetable insulating oil with high oxidation stability, and belongs to the technical field of vegetable oil refining. The core of the process is as follows: firstly, taking palladium and nickel salts in a specific molar ratio as precursors, and combining with polyethylene glycol to prepare a palladium-nickel bimetallic catalyst loaded on alkaline carclazyte; then, vegetable oil is mixed with the catalyst and activated carbon, and hydrogen is introduced under mild vacuum and heating conditions for selective hydrogenation refining; and finally, adding an antioxidant and a pour point depressant into the refined oil to obtain a final product. Through the synergistic effect of the catalyst, extremely unstable linolenic acid in hydrogenated oil can be efficiently and selectively hydrogenated, by means of an integrated process and blending, the oxidation stability is remarkably improved, meanwhile, the excellent low-temperature fluidity of the product is kept, the refining yield is high, the process is simple and convenient, and the method is suitable for large-scale production of the environment-friendly high-performance vegetable insulating oil.

This invention relates to the field of lubricating oil technology, and discloses an 80W-90 locomotive gear oil, its preparation method, and its application. Based on the total weight of the 80W-90 locomotive gear oil, it contains 50wt%~90wt% coal-based base oil, 5wt%~20wt% synthetic ester, 2wt%~7wt% extreme pressure anti-wear agent, 0.5wt%~3wt% antioxidant, 0.1wt%~0.7wt% pour point depressant, 0.001wt%~0.04wt% antifoaming agent, 0.05wt%~10wt% metal deactivator, 1wt%~8wt% viscosity index improver, 0.5wt%~1wt% rust inhibitor, and 0.02wt%~0.3wt% demulsifier. The 80W-90 locomotive gear oil exhibits excellent extreme pressure anti-wear properties, load-bearing capacity, pitting corrosion resistance, low-temperature fluidity, and thermal oxidation stability.

The invention provides a hydraulic oil composition as well as a preparation method and application thereof, and belongs to the technical field of industrial oil for an engineering machinery hydraulic system. The hydraulic oil composition comprises base oil, a viscosity index improver, an antioxidant, an anti-wear agent, an anti-rust agent, a metal deactivator, a pour point depressant, an anti-foaming agent and a demulsifier, the base oil is selected from hydrofined base oil; the viscosity index improver is polymethacrylate; the pour point depressant is polymethacrylate. According to the composition disclosed by the invention, the base oil, the viscosity index improver and the pour point depressant are improved, and other additives are matched, so that the prepared hydraulic oil composition has excellent low-temperature fluidity, anti-rust property, wear resistance, high-temperature oxidation resistance and the like, and the oil product can meet all requirements of quality indexes.

The application relates to the technical field of electrical insulation materials, and discloses a natural ester insulating oil and a preparation method thereof, the preparation method of the natural ester insulating oil comprising the following steps: preparing a composite pour point depressant mother liquor containing polymethyl acrylate and an intermolecular spacer; atomizing and injecting the composite pour point depressant mother liquor into a base oil flow for online mixing, and controlling the momentum flux ratio to be 5-20; gradient quenching the mixed oil flow, and controlling the cooling rate to be 6-15 DEG C / min. According to the application, fluid mechanics control and thermodynamics locking are adopted, so that the polymethyl acrylate pour point depressant is in a non-equilibrium state solvated dispersion structure in the base oil. The obtained insulating oil has a filter blocking tendency value less than 1.05, the application has excellent low-temperature fluidity and micro cleanliness, solves the problems of uneven dispersion and easy agglomeration of the polymer pour point depressant in the natural ester, and is suitable for high-voltage power equipment.