130results about How to "Improve cracking performance" patented technology

The invention discloses a binder and making method of modified urea-formaldehyde resin, which comprises the following steps: adopting urea-formaldehyde resin, fill, reinforcer, deoxidation agent, formaldehyde catching agent, anti-aging agent, anti-shrinking agent, hardener and auxiliary reinforcer; adopting modified copolymer of acrylic acid, sodium acrylate, N, N-dimethylamino propyl methyl acrylamide as anti-shrinking agent; making polyacrylamide solution reacted by acrylamide and ammonium persulphate as formaldehyde catching agent; allocating each component according to proportion; blending evenly; casting; extracting into vacuum; stripping; stewing; drying naturally; coating a layer of polymethacrylate paint on the surface of product; proceeding colorful paint; obtaining the product.

The present invention provides a super-stable Y zeolite and the preparation method thereof. The ratio of silicate to aluminum in the super-stable Y zeolite is 6-11. The lattice constant of the zeolite is 2.446 to 2.458 nanometers. The percentage of non-skeleton aluminum in total aluminum in the zeolite is not higher than 30% by weight. The diameter of secondary pores with diameter of 2 to 100 nanometers in the zeolite shows a double probable distribution. The most probable diameter of the secondary pores with comparatively large diameter is 6-15 nanometers. The proportion of secondary pores with diameter between 8 to 100 nanometers in total secondary pores is 35% to 60%. The preparation method of the zeolite includes the step of making the super-stable Y zeolite come into contact with a solution containing organic acids and inorganic acids in the atmosphere of inert gases and/or nitrogen. The modified super-stable Y zeolite provided in the invention is applied to catalytic cracking; therefore the following effects can be realized: the cracking ability of heavy oil is strong, the selectivity of gasoline is high, and the selectivity of dry gas and carbon coke is good.

The invention belongs to the technical field of preparation of additives, and in particular relates to a chlorine-free and alkali-free liquid setting accelerator and a preparation method thereof. The preparation method comprises the steps of adding aluminum sulfate and aluminum hydroxide into deionized water, and heating to obtain mother liquor of aluminate; then, adding magnesium fluosilicate and disodium ethylenediamine tetraacetate into the deionized water, and heating to obtain a magnesium fluosilicate solution; mixing the magnesium fluosilicate solution with the mother liquor of aluminate, then adding organic amine, organic acid and a stabilizer, and stirring to obtain the chlorine-free and alkali-free liquid setting accelerator. The setting accelerator prepared by the method has the characteristics of being small in mixing amount and good in setting acceleration effect; furthermore, after the setting accelerator is used, the mechanical properties of the concrete are improved, and the compressive strength of the concrete is increased; therefore, the chlorine-free and alkali-free liquid setting accelerator is an ideal concrete additive.

The invention relates to the technical field of pouring sealant, in particular to modified epoxide resin pouring sealant and a preparation method of the modified expoxide resin pouring sealant. The modified epoxide resin pouring sealant achieves improvement based on the prior art. The pouring sealant is composed of a component A and a curing agent. The weight ratio of the component A to the curing agent is 100 to 3-15, wherein the component A comprises, by weight, 1.0-8.0% of thinner, 25.0-39.0% of nano filler, 0.5-4.5% of flexibilizer, 0.08-0.45% of coupling agent, 0.08-0.45% of pigment, and the balance grapheme modified epoxide resin, and the total weight is equal to 100%. Compared with the prior art, due to addition of the grapheme modified epoxide resin and the nano filler, the pouring sealant is capable of improving high and low temperature resistant impact properties, capable of reducing hygroscopicity and a dilatation coefficient, capable of prolonging storage time, capable of strengthening dehiscence resisting capacity, and capable of having great value of industrial application.

The invention discloses a melt processing method of high-speed steel rolls containing high vanadium used for various rolling mills. When molten steel in transportation, ferrovanadium granules are added with flowing, the addition amount of the ferrovanadium granules is 0.80-1.20 percent of total weight of the molten steel. Before the molten steel is poured over a pouring ladle, yttrium based rare earth magnesium alloy, nitriding ferrochrome, potassium salt and metal aluminum are added into the pouring ladle in advance; wherein, the addition amount of the yttrium based rare earth magnesium alloy is 0.30-0.80 percent of the weight of the molten steel, the addition amount of the nitriding ferrochrome is 0.20-0.50 percent of the weight of the molten steel, the addition amount of the potassium salt is 0.30-0.80 percent of the weight of the molten steel and the addition amount of the metal aluminum is 0.30-0.60 percent of the weight of the molten steel. When the temperature of the molten steel reaches between 1450-1480 DEG C, the molten steel in a centrifuge is directly cast into rollers; during the process of casting molten steel, the ferrovanadium granules and ferrotitanium granules with granule dimension between 5mm-8mm are added with flowing, wherein, the addition amount of the ferrovanadium granules and the ferrotitanium granules is respectively 0.30-0.80 percent and 0.40-1.00 percent of the total weight of the molten steel. The centrifugal casting high-speed steel rolls containing high vanadium of the invention has less segregation, no casting cracks, high rigidity and good abrasion resistance.

The invention discloses high temperature-resistant, high-radiation, anti-cracking and energy-saving coating and a preparation method. The high temperature-resistant, high-radiation, anti-cracking and energy-saving coating can be applied to various industrial furnaces and boilers. The high temperature-resistant, high-radiation, anti-cracking and energy-saving coating is prepared from the following components in parts by weight: 30-40 parts of high temperature-resistant and high-radiation powder, 10-20 parts of a high temperature-resistant filler, 1-5 parts of high temperature-resistant fiber filaments, 30-50 parts of a bonding agent and 10-20 parts of a solvent, and further 0.1-0.2 part of a dispersing agent, 0.15-0.3 part of a coupling agent and 0.05-0.15 part of a defoaming agent. The high temperature-resistant, high-radiation, anti-cracking and energy-saving coating is characterized in that metals and non-metallic fiber filaments are introduced into a coating slurry, on one hand, the non-metallic fiber filaments have a certain suspending effect in the coating slurry and can improve the stability of the slurry, and on the other hand, the fiber filaments can hinder the sintering contraction and cracking of the coating and prolong the service life of the coating.

The invention discloses an oil fume resistant polycarbonate material, a preparation method and application thereof. The oil fume resistant polycarbonate material is prepared from the following components by mass: 70-90% of polycarbonate; 5-20% of modified nitrile butadiene rubber; 4-15% of a flame retardant; 0.3-3% of an antioxidant, and 0.4%-3% of a lubricating agent. The modified nitrile butadiene rubber is prepared from nitrile butadiene rubber and an ethylene-methyl acrylate copolymer in a mass ratio of 2-5:1. The material has excellent impact toughness, good flame retardant properties and electrical insulation properties, also has well improved oil fume cracking resistance, and is very suitable for preparation of kitchen wall switches and other products. The preparation method of the oil fume resistant polycarbonate material disclosed in the invention adopts existing equipment, the preparation is simple and is easy for industrial production, thus having broad application prospects.

The invention relates to a modified clay and a preparation method thereof. The modified clay is prepared by being roasted at 800-1100 DEG C for 0.3-10h, comprising the following materials by mass percentage: 0.1-3.0 of P, 0.1-4.0 of RE2O3 and 0.1-1.5 of Na2O; the pore volume of the modified clay is 0.1-0.5ML/g, the specific surface is 50-400m/g, and the average grain diameter is 0.5-15mu m. The preparation method comprises the following steps: roasting clay at 800-1100 DEG C for 0.3-10h, mixing the roasted clay and deionized water evenly, adding inorganic alkali solution with 0.5-15 mol/L of OH-concentration in the mixture to react at 50-100 DEG C for 0.1-5h and obtaining clay slurry; filtering the clay slurry,,washing the obtained clay slurry by inorganic acid solution at 30-100 DEG C, introducing phosphorus and rare earth by soaking, separating and drying to obtain the modified clay; wherein, the mass ratio of deionized water to clay (dry basis) is 1.5-10, the mass ratio of inorganic alkali solution to clay (dry basis) is 0.5-8, and the inorganic alkali is selected out of one or more of sodium hydroxide, water glass, ammonia and sodium meta-aluminate.

The invention discloses a ceramic coating protection gradient carbon-ceramic composite material and a preparation method thereof. The ceramic coating protection gradient carbon-ceramic composite material comprises: a gradient carbon-ceramic composite material which is provided with a concave structure on the surface thereof and is a gradient C/C-ZrC-SiC composite material; and an ultrahigh-temperature ceramic coating which is continuously arranged along the surface of the gradient carbon-ceramic composite material and the inner wall surface of the concave structure. The ultrahigh-temperature ceramic coating is an indissolvable metal carbide coating formed by diffusing and infiltrating indissolvable metal along the surface of the gradient carbon-ceramic composite material and reacting the indissolvable metal with the surface of the gradient carbon-ceramic composite material. Therefore, the formed ceramic coating is a three-dimensional jack structure coating, the interfacial strength of the ceramic coating is far higher than that of a two-dimensional plane coating, the surface area of the coating is greatly increased due to the arrangement of the concave structure, meanwhile, the flow resistance of melt on the surface of the composite material can be improved, then the overall temperature resistance of the composite material can be improved, and the risk of coating stripping is reduced.

The invention discloses a bridge compound pier stud structure based on an orientation ECC and a construction process. The bridge compound pier stud structure comprises a pier stud plastic hinging areafor connecting a concrete pier stud base and a concrete pier stud. The pier stud plastic hinging area is of a reinforced concrete columnar structure. Concrete adopted in the pier stud plastic hingingarea is an oriented-fiber-enhanced cement-base composite. The oriented-fiber-enhanced cement-base composite is a cement-base composite with fibers in a cement base body arrayed in one direction. Thetending direction of the fibers in the oriented-fiber-enhanced cement-base composite is the same as the axial direction of the pier stud plastic hinging area. A reinforcing steel bar framework adoptedin the pier stud plastic hinging area is formed by binding a plurality of low-yield reinforcing steel bars and a plurality of high-strength reinforcing steel bars through reinforcement stirrups. Thelow-yield reinforcing steel bars and the high-strength reinforcing steel bars are parallel in pairs and located in different planes.

The invention provides an anti-fracturing solid wood composite board and a processing method thereof. At least one non-impregnated fiber layer is arranged on a base material, the upper face and the lower face of the non-impregnated fiber layer are respectively provided with at least one impregnated layer, the non-impregnated fiber layer, the upper impregnated layer and the lower impregnated layer form an anti-fracturing fiber buffering layer, and the fiber buffering layer and the base material are composited in a hot-press mode to form the anti-fracturing solid wood composite board. The anti-fracturing solid wood composite board has the advantages that the fracturing phenomenon caused by different expansion factors is avoided, and surface resin can not fracture due to expansion or shrinkage of the base material; production cost is not increased, the processing method is simple and practical, and the anti-fracturing solid wood composite board can be suitable for industrial mass production.