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97results about How to "Improve bonding performance" patented technology

Ultrafine grain wolfram carbide/ cobalt hard alloy and preparation method thereof

The invention discloses an ultrafine grain wolfram carbide (WC)/ cobalt hard alloy containing rare-earth hexaboride and a preparation method thereof and belongs to the field of high-performance powder metallurgy materials. The hard alloy comprises the following components in percentage by weight: 0.1 to 2 percent of the rare-earth hexaboride, 0.1 to 0.6 percent of chromium carbide, 0.1 to 0.4 percent of vanadium carbide, 5 to 15 percent of cobalt powder, and the balance of wolfram carbide powder. The preparation method comprises the following steps of: weighing the wolfram carbide powder, the cobalt powder, the rare-earth hexaboride powder, the chromium carbide powder and the vanadium carbide powder with certain granularity in percentage by weight; uniformly mixing the powder by ball milling; pressing the mixture by a mold pressing process to form a green ware body in a certain shape; degreasing the green ware body and sintering the degreased green ware body in a high-temperature low-pressure sintering furnace; and cooling the obtained product along with the furnace to obtain the ultrafine grain wolfram carbide/cobalt hard alloy. The hard alloy has the advantages of rational proportion of the components, simple production process, effective reduction in the grain size of the WC in the hard alloy and improvement on the hardness and fracture toughness of the hard alloy by adulterating the rare-earth hexaboride to inhibit the growth of the wolfram carbide grains in the sintered hard alloy, achievement of high hardness and fracture toughness and application in industrial production.
Owner:昆山长鹰硬质材料科技股份有限公司

Room-temperature vulcanized one-component dealcoholized silicone rubber sealant and preparation method thereof

The invention discloses a room-temperature vulcanized one-component dealcoholized silicone rubber sealant and a preparation method thereof. The sealant comprises the following components in parts by weight: 100 parts of (A) alpha, omega-dihydroxyl polydimethylsiloxane, 10-30 parts of (B) simethicone, 5-10 parts of (C) a cross-linking agent, 1-5 parts of (D) a silane coupling agent, 50-150 parts of (E) reinforcing filler, 0.5-3 parts of (F) a catalyst and 0.5-2 parts of (G) storage stabilizer. Due to addition of the silane coupling agent containing various active functional groups, the defect that common dealcoholized silicone rubber sealant cannot have good adhesion performance and good storage performance at the same time is overcome, and storage performance is not affected when the adhering performance is improved. In addition, as the sealant uses the titanate catalyst with low yellowing property, the sealant has excellent yellowing resistance, the defect that common dealcoholized silicone rubber sealant is easy to yellow is overcome, and the sealant provided by the invention can be widely applied to adhering and sealing in the industries such as electronics, automobiles and home appliances.
Owner:SUZHOU TIANSHAN NEW MATERIAL TECH

Fiber reinforced resin composite material, preparation method and applications thereof

The invention discloses a preparation method of a fiber reinforced resin composite material. The preparation method comprises the following steps: subjecting the fibers, which have been subjected to a surface oxidization treatment, to a coating treatment; subjecting the fibers, which have been subjected to the coating treatment, to three-dimensional knitting according to a required shape; placing the knitted three-dimensional textile into a mould, pouring thermosetting resin into the mould, and carrying out low-temperature injection moulding. According to the preparation method, a three-dimensional textile is taken as the skeleton, and thermosetting resin is taken as the filling material. The preparation method is characterized in that the processing temperature is low (not higher than 160 DEG C), the obtained three-dimensional composite material has a high mechanical strength in the vertical direction and in the horizontal direction; and moreover, due to the existence of the three-dimensional textile framework, the impact-resistant and anti-knock performances of the composite material are greatly improved. A fiber reinforced resin composite material prepared by the provided preparation method is also disclosed. The composite material can be used to produce the battery tank of electric vehicle.
Owner:江苏南创化学与生命健康研究院有限公司

Modified phenolic resin for bamboo structure material and preparation method thereof

The invention discloses modified phenolic resin for a bamboo structure material, which comprises 35 to 85 percent of phenolic aldehyde stock solution, 0 to 40 percent of aqueous solution of formaldehyde, 7 to 20 percent of alkali aqueous solution and 0.5 to 5 percent of resorcinol. The phenolic aldehyde stock solution is mixed solution prepared from 2 to 85 weight percent of phenol and 15 to 98 weight percent of formaldehyde. A preparation method for the modified phenolic resin comprises the following steps of: adding the phenolic aldehyde stock solution into a reaction kettle, adding the aqueous solution of formaldehyde into the reactor for the first time, adding partial alkali aqueous solution into the reactor, heating the solution to between 30 and 70 DEG C, and reacting the solution for 30 to 90 minutes; adding the aqueous solution of formaldehyde into the reactor for the second time within an additional proportion range, uniformly heating the solution to between 70 and 98 DEG C, and reacting the solution for 20 to 90 minutes with heat preservation; adding the alkali aqueous solution into the reactor within an additional proportion range, and reacting the solution; adding a resorcinol modifying agent into the reactor till the viscosity of the tested glue solution is 15 to 700mPa.s; and cooling the reaction product to below 40 DEG C, and discharging the product. The gluing performance of the resin on the bamboo material is remarkably improved by adding the resorcinol modifying agent to modify the phenolic resin, and the adhesive has low free formaldehyde content and has the characteristics of energy conservation and environmental protection.
Owner:INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY

Addition type liquid silicone rubber tackifier, as well as preparation method and application thereof

The invention discloses an addition type liquid silicone rubber tackifier, as well as a preparation method and application thereof. The preparation method comprises the following steps of step 1, mixing 80-120 parts of an acrylic compound containing phenyl groups and ester groups with 0.006-0.06 part of a platinum catalyst solution of which the mass concentration is 0.05-0.5% to obtain a mixture, and preheating the mixture at certain temperature environment for some time so as to obtain mixed liquor for standby application; step 2, adding 100-150 parts of D4H containing silicon-hydrogen bonds, 100-200 parts of toluene and 0.12-0.50 part of p-hydroxyanisole to a round-bottomed flask, and raising temperature while stirring; step 3, when the temperature in the round-bottomed flask reaches to 40-90 DEG C, dropwise adding the mixture in the step 1 to the round-bottomed flask; step 4, after the mixture is dropwise added, controlling the reaction temperature to 60-100 DEG C, and performing a reaction for 1-5h; and step 5, after the reaction is completed, cooling reaction fluid to room temperature, then adding activated carbon for adsorbing residual platinum catalysts, and finally performing sucking filtration and rotary evaporation on the reaction fluid so as to obtain the tackifier. According to the addition type liquid silicone rubber tackifier, as well as the preparation method and application thereof disclosed by the invention, a small quantity of the tackifiers are added to shaping liquid silicone rubber, so that the bonding failure between the shaping liquid silicone rubber and PC plastic cement reaches to 100% cohesive failure.
Owner:岳胜武

Preparation method of special low-smoke halogen-free flame retardant cladding layer material for butterfly-shaped introduction cable of access network

The invention provides a preparation method of a special low-smoke halogen-free flame retardant cladding layer material for a butterfly-shaped introduction cable of an access network. The preparation method comprises the following steps of: (1) proportioning the components of the cladding layer material in parts by weight: 5-15 parts of high-fused ethylene-vinyl acetate copolymer, 5-15 parts of low-fused ethylene-vinyl acetate copolymer, 5-15 parts of polyethylene, 55-65 parts of a fire retardant, 10-20 parts of compatilizer, 2-3 parts of ultra-high molecular weight silicone, and 0.3-0.8 part of anti-oxygen; adding the components in a milling machine for mixing for 8-12 minutes, and discharging when the mixing temperature reaches 135-150 DEG C; (2) feeding the mixture into a double-screw-rod extruding machine, plastifying through double screw rods, and pelleting through a single screw rod, wherein for all the sections of the screw rods, a feeding section has a temperature of 90-110 DEG C, a transportation section has a temperature of 120-130 DEG C, a plastifying section has a temperature of 130-140 DEG C, and a machine head has a temperature of 135-145 DEG C; and pelleting is carried out by using an air cooling and hot cutting process; and finally drying the made particles to obtain a finished product. The cladding layer material manufactured by the invention is used as a special material of a rubber-insulated optical cable, and has the advantages of good material flowing property, good binding property and good product quality. Furthermore, the optical attenuation degree can be greatly reduced.
Owner:SUZHOU HENGLI COMM MATERIAL +1

Overlapping structure of waterproof coil materials, and construction method

InactiveCN107313342AInhibition of Infiltration and PenetrationImprove bonding performanceUnderground chambersRoof covering using flexible materialsGraphene nanocompositesWater seepage
The invention discloses an overlapping structure and a construction method of a waterproof coiled material, and belongs to the technical field of waterproof layer construction. The overlapping structure includes two waterproof rolls whose ends are overlapped with each other, wherein one end of the waterproof roll is in an asymmetric concave shape, and the end of the other waterproof roll is in a corresponding convex shape. The overlapping parts of the waterproof membrane are connected by an adhesive layer, and a waterproof strengthening coating is also provided at the seam of the surface of the waterproof membrane. The construction method of the lap joint structure is as follows: clean up the lap joint ends of the two waterproof rolls and remove the protective film; evenly coat the contact surfaces of the two lap joint ends with adhesive epoxy resin/graphene nanocomposite material ;Tightly combine the two overlapping ends, press for 2~5 minutes, and then apply a strong waterproof coating on the seam of the upper surface of the waterproof membrane, and let it dry. The overlapping structure can greatly improve the firmness of the overlapping structure of the waterproof coiled material, avoid water seepage and leakage, and has a good application prospect.
Owner:安徽科徽联合认证有限公司

Waterborne epoxy modified phenolic resin emulsion, preparation method thereof and adhesive prepared by using same as raw material

The invention relates to a waterborne epoxy modified phenolic resin emulsion, a preparation method thereof and an adhesive prepared by using same as a raw material and aims at solving the problem that an existing waterborne epoxy modified phenolic resin emulsion is large in brittleness and low in adhesion strength after being cured. The waterborne epoxy modified phenolic resin emulsion consists of thermosetting phenolic resin, epoxy resin, common solvent, protective colloid, a non-ionic emulsifier and deionized water. The preparation method comprises the steps of solving the thermosetting phenolic resin and the epoxy resin in the common solvent and perform even stirring to obtain a resin solution; solving the protective colloid and the non-ionic emulsifier in the deionized water to obtain an emulsion water solution, mixing the resin solution and the emulsion water solution and performing emulsification and stirring to obtain the waterborne epoxy modified phenolic resin emulsion. The adhesive consists of the waterborne epoxy modified phenolic resin emulsion, a curing agent, an inorganic filler, a coupling agent and an inhabitation corrosive. The waterborne epoxy modified phenolic resin emulsion is small in brittleness and high in adhesion strength after being cured and is used for the field of adhesives.
Owner:INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI

High-strength straw brick and preparation method thereof

The invention discloses a high-strength straw brick and a preparation method thereof, and relates to the technical field of straw construction materials. The high-strength straw brick is prepared fromthe following raw materials in parts by weight: 60-80 parts of modified straw, 20-30 parts of cement, 7-15 parts of modified urea formaldehyde resin, 7-15 parts of stone powder, 2-5 parts of ceramsite, 0.05-0.5 part of ammonium chloride and 0.5-2 parts of polyphenylene sulfide powder. The preparation method of the high-strength straw brick comprises the following steps: mixing and uniformly stirring the modified straw, the stone powder, the ceramsite, the polyphenylene sulfide powder and the cement; adding a right amount of water and performing uniform stirring; adding the modified urea formaldehyde resin and performing uniform stirring; adding the ammonium chloride and performing uniform stirring to obtain mixture; and paving the mixture into a mold, and performing press forming, condensation curing, solidification demolding and airing to obtain the high-strength straw brick. The brick prepared by adopting heat-insulated straw as a substrate bonded with the cement and the modified urea formaldehyde resin has high compactness, good strength and water resistance and good heat insulation performance, anti-seismic performance, sound insulation performance, anti-cracking performance and the like, and can replace a common brick to serve as a construction material, thereby reducing the construction energy consumption.
Owner:安徽展大生物科技有限公司

Construction technology of insulation heat preservation layers of deep cooling pipeline connecting equipment

The invention discloses a construction technology of insulation heat preservation layers of deep cooling pipeline connecting equipment. The construction technology comprises the following steps that firstly, according to the equipment size and requirement, heat preservation blocks are prefabricated, and then, the heat preservation blocks are longitudinally bonded on the surface of the equipment at intervals; foam is sprayed on the surface of the equipment between the heat preservation blocks for priming, when the thickness of priming reaches 50% of the total thickness, metal outer protecting layers are installed on the exterior of the equipment from bottom to top in sequence, and the foam is injected and molded in interior spaces as every layer is installed until the layer is installed at a sealing head of the equipment; and finally, foam spraying is conducted on the sealing head, and then the metal protecting layers are installed to achieve whole installing completing. By means of the construction technology of the insulation heat preservation layers of the deep cooling pipeline connecting equipment, heat preservation processing on the connecting equipment is achieved, and the whole heat preservation performance is ensured.
Owner:南通梵浩保温科技有限公司
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