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128results about How to "Good temperature resistance" patented technology

Superhard strong toughness and high-entropy alloy nitride nano-composite coating carbide blade and preparation method thereof

The invention discloses a superhard strong toughness and high-entropy alloy nitride nano-composite coating cemented carbide blade. A superhard nano-composite coating is deposited on a cemented carbidesurface, wherein the superhard nano-composite coating is composed of a bonding layer, a transition layer, a support layer, a stiffening layer, a wear-resistant layer and a temperature-resistant layer; the bonding layer is a pure Cr layer, and the transition layer is a CrN layer; the support layer is a nano-multilayer film formed through alternate growth of the transition layer and the stiffeninglayer, and the stiffening layer is a TiVZrNbHfN high-entropy alloy nitride layer; and the wear-resistant layer is a nano-multilayer film formed through alternate growth of the stiffening layer and thetemperature-resistant layer material, and the temperature-resistant layer is an AlCrNbSiTi high-entropy alloy nitride layer. According to the nano-composite coating cemented carbide blade, by adopting deign of various high-entropy alloy coating materials and composition gradient, the internal stress of the coating can be reduced greatly, and the toughness of the coating is improved; the disadvantage of low temperature resistance of an existing blade coating is overcome effectively; and the service life of the cemented carbide blade is prolonged greatly, and the adaptability of the cemented carbide blade is improved.
Owner:WUHAN UNIV

Polyether-ether-ketone modified polytetrafluoroethylene composite material, bearing retainer and making method of bearing retainer

The invention discloses a polyether-ether-ketone modified polytetrafluoroethylene composite material, a bearing retainer and a making method of the bearing retainer. The composite material comprises, by mass, 18-25% of polyether ether ketone, 5-8% of tungsten disulfide, and the balance of polytetrafluoroethylene. The composite material comprises polytetrafluoroethylene, polyether-ether-ketone and tungsten disulfide. Polyether-ether-ketone has good temperature resistance, hydrolysis resistance, compression strength and corrosion resistance, has a low friction coefficient and has wear fastness, tungsten disulfide has high compression strength and high oxidation resistance, and very low friction coefficient, and polyether-ether-ketone and tungsten disulfide are used to modify polytetrafluoroethylene as fillers, so the obtained composite material reserves the lubrication performance of polytetrafluoroethylene, improves the dimension stability, the compression strength and the wear resistance of polytetrafluoroethylene, and has a greatly higher thermal deformation temperature than a pure polytetrafluoroethylene material, thereby requirements of the material of the retainer by long life bearings are met.
Owner:LUOYANG BEARING RES INST CO LTD

Partially hydrolyzed acrylamide water-soluble polymer with utlralong hydrophobic long chain, preparation method therefor and application thereof

The invention discloses a partially hydrolyzed acrylamide water-soluble polymer with an utlralong hydrophobic long chain, a preparation method therefor and an application thereof. A structural formula of the partially hydrolyzed acrylamide water-soluble polymer is as shown in formula II. The preparation method for the polymer as shown in formula II provided by the invention comprises the following steps: (1) under an inert atmosphere, dissolving acrylamide and docosyl polyoxyethylene ether methacrylate into water to obtain a solution I; (2) under the inert atmosphere, dissolving acrylic acid into water to obtain a solution II, and adding NaOH into the solution II to regulate the pH value of the system to 6-7; and (3) mixing solutions I and II obtained in the steps (1) and (2), and adding an initiator into the mixed solution to carry out a polymerization reaction, thereby obtaining the polymer. According to the preparation method provided by the invention, raw materials are easily available, preparation is simple, yield is relatively high, use is safe and storage is convenient. The partially hydrolyzed acrylamide water-soluble polymer with the utlralong hydrophobic long chain can be directly used, and has an extensive potential utilization value in the fields of oil exploitation, paint, medicines, daily use chemicals and the like.
Owner:CHINA NAT OFFSHORE OIL CORP +1

Development of controllable cross-linking agent for methanol-based fracturing fluid

The invention relates to a cross-linking agent for alcohol-based fracturing fluids, in particular to the development of a controllable cross-linking agent for methanol-based fracturing fluid, and the cross-linking time of the controllable cross-linking agent can be adjusted. For certain natural gas wells or oil wells with low formation pressure, low permeability and strong water-locking characteristic, the controllable cross-linking agent for methanol-based fracturing fluid can be used in the fracturing stimulation process. Inorganic zirconium or zirconate ester is adopted as a raw material, isopropanol or water or the mixture of isopropanol and water is adopted as solvent, suitable ligand is added, the materials react according to a certain material proportion under certain conditions for 4 hours, neutralizer is then added for neutralization, and finally, a moderate amount of diluent is added, so that the controllable cross-linking agent for methanol-based fracturing fluid is prepared. The cross-linking agent can be cross-linked with polymer with 60 to 100 percent of methanol content, the application range is wide, the dosage is little, and the controllable cross-linking agent cannot harm the environment. The biggest difference between the cross-linking agent disclosed by the invention and organic zirconium series cross-linking agents sold on the market is that mixed diluent formed by low-molecular weight sodium polyacrylate and low-molecular weight polyacrylic acid is adopted as the diluent of the controllable cross-linking agent.
Owner:北京希涛技术开发有限公司

Tire stock of IPN (Interpenetrating Polymer Network) crosslinked structure and mixing method as well as application thereof

The invention relates to the field of rubber tires, in particular to a tire stock and a mixing method as well as application thereof. The tire stock of an IPN (Interpenetrating Polymer Network) crosslinked structure is prepared by mixing the following raw material components in part by weight: 100 parts of first network material, 0.1-30 parts of second network material, 0.8-20 parts of co-meltingassistant, 20-150 parts of carbon black, 1-30 parts of activating agent, 0-50 parts of softening agent, 0-20 parts of anti-aging agent, 0.1-10 parts of vulcanizing agent and 0.1-20 parts of vulcanization accelerator, wherein the first network material is one or the combination of more selected from diene rubbers; and the second network material is selected from natural resin or synthetic resin providing a crosslink bond and monomer of the synthetic resin. In the invention, the advantages of superior temperature resistance, high shear strength resistance and high torsion deformation resistanceof an IPN vulcanization network bond are integrated while each item of physical performance and processing performance of the conventional single sulfur crosslink bond are kept; and the service performance of a tire formula is improved to the greatest extent.
Owner:ZHONGCE RUBBER GRP CO LTD
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