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60results about How to "Both hardness" patented technology

Ultraviolet curing anti-drag paint in steel pipes

ActiveCN102079937AGood adhesionGood mechanical properties and chemical resistancePolyurea/polyurethane coatingsEpoxy resin coatingsPrepolymerSteel quality
The invention relates to an ultraviolet curing anti-drag paint in steel pipes. Epoxy acrylate and polyester acrylate are combinedly used as prepolymers, and phosphate-modified acrylate resin is used as an adhesion promotor, thereby greatly increasing the adhesion; a mixture of two or three of tripropylene glycol diacrylate, isobornyl acrylate and ethoxylated trimethylolpropane triacrylate is selected as an active monomer, and multiple functional group monomers are selectively added for compounding, thereby simultaneously satisfying curing speed, hardness, adhesion, flexibility and other requirements; multiple initiator compounding systems are adopted so as to simultaneously implement curing on the surface layer and deep layer; the paint provided by the invention has favorable mechanical properties and chemical resistance on a steel substrate; after coating, the surface is very smooth, has favorable anti-drag effect, can effectively enhance the salt fog resistance and corrosion resistance of the coating and the transmission efficiency of the pipeline, and can be widely used in anti-drag corrosion prevention in transmission pipelines in the fields of oil transmission, gas transmission, water supply and drainage, and the like.
Owner:SHANGHAI HILONG SHINE NEW MATERIAL

Self-cleaning superhard polysilazane hydrophobic coating and preparation and use method thereof

The invention discloses a self-cleaning superhard polysilazane hydrophobic coating and a preparation and use method thereof, and belongs to the technical field of super-hydrophobic coatings. The self-cleaning superhard polysilazane hydrophobic coating is prepared from the following components in parts by weight: 5 to 25 parts of organic-inorganic hybridized polysilazane, 15 to 30 parts of hydrophobic acrylate resin, 5 to 15 parts of nanometer silicon dixoide and 40 to 250 parts of organic solvent. The self-cleaning superhard polysilazane hydrophobic coating has the advantages that the excellent superhard, super-hydrophobic, scratch-resistant, abrasion-resistant and high-adhesion properties of a coating are realized; the defects of easiness in cracks, voids and the like in the inorganic polysilazane coating along with the increase of coating thickness are overcome; the problem of low hardness of the organic polysilazane is solved; the coating has the advantages that the hardness is high, the adhesion force is high, the easiness in falling and cracking of the coating is avoided, and the abrasion-resistant and scratch-resistant properties of the coating are ensured; the preparation technology is simple, the implementing is easy, and the preparation technology is suitable for widely popularized and applied.
Owner:BEIJING NEATRITION TECH CO LTD

Aging-resistant silver-plastic composite pipe

InactiveCN101216132AAnti-infraredLightfastRigid pipesWaxPolypropylene
An anti-aging silver-plastic composite tube takes polyethylene, polypropylene or polyvinyl chloride as the matrix material and is composed of an outer tube and an inner tube. The composition and content of the outer tube are as follows (by weight parts): low-density polyethylene (LDPE0 and / or high-density polyethylene (HDPE), polypropylene (PP) or polyvinyl chloride (PVC) 100, silver powder 0.1-10, silver ash 0.1-5, antioxidant 1010 0.5-3, wax 0.5-3 and stearic acid HST 0.5-3. The inner tube is an LDPE, PP, PVC or metal tube. The composite tube in silver-white color has the advantages of good appearance, anti-ageing effect, resistance against deformation, brittle rupture and discoloration, long service life, recyclable materials, reduced material cost, and increased product quality.
Owner:姜晓兵

Inorganic modified high-temperature-resistant high-emissivity graphene coating and preparation method thereof

InactiveCN109880408AAdhesive performance is stableHigh bonding strengthAlkali metal silicate coatingsIonGraphene coating
The invention provides an inorganic modified high-temperature-resistant high-emissivity graphene coating. The inorganic modified high-temperature-resistant high-emissivity graphene coating is preparedfrom the following raw materials in parts by weight: 35-55 parts of an inorganic high-temperature adhesive; 3-10 parts by weight of an organic silicon resin emulsion; 1-10 parts by weight of a graphene dispersion liquid; 20-30 parts by weight of a functional filler; 1-4 parts by weight of an auxiliary agent; and 10-20 parts by weight of deionized water. According to the invention, the organic silicon resin emulsion and the inorganic high-temperature adhesive are subjected to hybridization reaction, thus normal-temperature curing of the inorganic adhesive can be accelerated, and the defects oflarge volume shrinkage in the curing process of the inorganic adhesive and easy generation of cracks and micro pores due to the rigidity of a formed film are effectively solved; the high radiation and high heat conductivity coefficient of graphene are utilized, and multiple functional fillers are supplemented, thus the emissivity of the prepared inorganic modified high-temperature-resistant high-emissivity graphene coating is 0.98 or above, and meanwhile the temperature resistance can reach 1200 DEG C. The invention also provides a preparation method of the inorganic modified high-temperature-resistant high-emissivity graphene coating.
Owner:SHENZHEN GUOCHUANG JIAWEI GRAPHENE TECH CO LTD +1

Preparation method of high-strength high-nitrogen rare earth stainless bearing steel

The invention discloses a preparation method of high-strength high-nitrogen rare earth stainless bearing steel. The preparation method comprises the processes of primary smelting, refining, vacuum degassing, casting, pressurized electroslag remelting and heat treatment. Nitride is added in the pressurized electroslag remelting process, meanwhile, the nitrogen pressure is controlled, the nitrogen content in steel is increased to 0.3%-0.5%, the nitrogen increasing process is stable, and nitrogen distribution is uniform; rare earth elements are added before nitrogen dissolving to purify molten steel, so that the stability and uniformity of the nitrogen dissolving process are further improved, and the strength of the bearing steel is effectively improved; 80-90% of rare earth elements are usedfor purifying molten steel, the rest of rare earth elements are dissolved in the molten steel for microalloying, and the toughness of the bearing steel is remarkably improved through the two parts ofrare earth elements which are matched in a labor-division mode; and in addition, the mode of combining diffusion deoxidation, vacuum deoxidation and rare earth deep deoxidation is adopted, the deoxidation effect is guaranteed, meanwhile, use of aluminum is reduced, harm of the aluminum is reduced, and the anti-fatigue performance of the steel is improved.
Owner:DEQING TIANMA BEARING CO LTD

Wearing-resistant composite material fan coal mill hitting plate

The invention discloses a wearing-resistant composite material fan coal mill hitting plate which comprises a metal substrate, a composite material insert block, dowels and a rubber ring, wherein through holes and dowel holes I are uniformly formed in the metal substrate; one end of the composite material insert block protrudes out; the other end of the composite material insert block is a steppedshaft; one end of the stepped shaft is sleeved by the rubber ring; a dowel holes II are formed in the composite material insert block; dowel holes III are formed in the rubber ring; the composite material insert block is embedded into the metal substrate; the dowels penetrate through the dowel holes I in the metal substrate, the dowel holes III in the rubber ring and the dowel holes II in the composite material insert block; the cross section of the protruding end of the composite material insert block takes the shape of a circle or a polygon. By adopting the hitting plate, the wearing resistance of the hitting plate can be remarkably improved, the service life of the hitting plate can be greatly prolonged, and in addition, a ceramic / metal-based composite material can be replaced in time after being damaged or peeled off, so that the production and repairing cost can be lowered, and the production efficiency can be improved.
Owner:KUNMING UNIV OF SCI & TECH

Three-proofing coating for flexible printed circuit board

The invention relates to the technical field of printed circuit board protection and in particular relates to a three-proofing coating for a flexible printed circuit board. According to the three-proofing coating, the advantages of organic silicon resin and acrylic resin are integrated in formula, a low-toxicity efficient solvent is adopted for promoting dissolution and dispersion of the resin in water, a good curing effect is achieved, and ocimene has an effect of assisting in film formation and endows the coating with pleasant aroma; mixed resin is ultrasonically processed in the solvent at first technologically, so that the mixed resin easily reacts with other materials and is easily compatible with the materials, and the subsequent curing speed is increased; the prepared coating is a waterborne coating, is environmental friendly and has good waterproof moisture-resistant effects, and a cured paint film is good in hardness and toughness, can completely fit the flexible circuit board and is not easily cracked in vibration and bending processes of the flexible circuit board, so that three-proofing effects are further enhanced and the occurrence probability of circuit board faults caused by environmental factors is reduced.
Owner:乐凯特科技铜陵有限公司

Hyperbranched polyethyleneimine doped and modified acrylic emulsion and preparation method thereof

The invention provides a hyperbranched polyethyleneimine doped and modified acrylic emulsion and a preparation method thereof. The emulsion provided by the invention is particularly suitable for preparing a waterborne wood paint coating, and good paint film performance can be obtained. Hyperbranched polyethyleneimine is added into an acrylic emulsion which is neutralized to be weakly alkaline, anduniform mixing is carried out to obtain the hyperbranched polyethyleneimine doped and modified acrylic emulsion, wherein the acrylic emulsion is prepared by a polymerization reaction of components including an acrylate monomer, a functional monomer acid, a post-crosslinking monomers and an emulsifier; and the post-crosslinking monomer at least comprises at least one of diacetone acrylamide and ethylene glycol dimethacrylate.
Owner:WANHUA CHEM GRP CO LTD +2

High-finish-degree antibacterial stainless steel pump valve casting and manufacturing method thereof

The invention discloses a high-finish-degree antibacterial stainless steel pump valve casting. According to the stainless steel pump valve casting, the use amount of elements such as Cu, Zr and Ag is properly increased on the basis that low-carbon steel has good toughness and plasticity, good casting mold forming performance is given to a stainless steel casting material, the hardness and toughness are achieved, corrosion resistance is extremely excellent, the certain antibacterial property is achieved, the situation that the surface of the material breeds bacteria and consequently use is affected can be prevented, crystal nucleuses can be refined effectively through the added rare earth element, the surface quality of the casting is improved, shrinkage cavities are reduced, and a high-finish-degree material is obtained; and the deoxygenation and impurity removal effects are achieved through a composite refining agent of nanometer Ca-RE intermediate phase alloy powder loaded by honeycomb ceramic powder and graphene, the slagging speed is high, efficiency is high, the degree of purity of molten steel can be increased effectively, the performance of stainless steel heat-treated multiple times is stable, and the energy-saving and efficient production effects of products are achieved.
Owner:TONGLING JINGWEI FLUID SCI & TECH

Dental implant carrying device and implantation tool assembly

The invention discloses a dental implant carrying device. The dental implant carrying device comprises a carrying body and a connecting body, wherein the carrying body is a columnar component; an implantation tool combination section is arranged at one end of the surface of the carrying body; a dental implant combination section is arranged at the other end of the surface of the carrying body; theimplantation tool combination section is matched with an external implantation tool interface; the dental implant combination section is matched with an external abutment interface of a dental implant; the connecting body is a columnar component, is coaxial with the carrying body and comprises a connecting rod and a joint; one end of the connecting rod is connected with the dental implant combination section, and the other end of the connecting rod is connected with the joint; the diameter of the connecting rod is smaller than that of the joint; and the carrying body is a medical metal component, and the connecting body is a non-toxic high polymer material component. The connecting body is made of a material with good elasticity, and the carrying body is made of a material with relativelyhigh hardness, so that the assembled dental implant carrying device has both elasticity and hardness, and the overall material cost and processing cost are far lower than those of the existing carrying device.
Owner:广东中科安齿生物科技有限公司
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