106results about How to "Moderate reactivity" patented technology

The invention relates to a preparation method of graphene and graphene prepared by the method, and is characterized in that the method adopts graphite as a raw material; a graphite intercalation compound is prepared by intercalating metal between graphite layers; and then graphene is prepared by peeling the graphite intercalation compound. The graphene prepared by the method has a length and a width of 5-15000 nm, and a thickness of 0.3-15 nm. The advantages of the invention are that: the raw material source is wide; the cost is low; the preparation method is simple; the product performance is stable and controllable; and the method is suitable for industrial production.

Process for the assembly of at least two articles made of silicon carbide-based materials by moderately refractory non-reactive brazing, in which the articles are placed in contact with a non-reactive brazing composition, and the assembly formed by the articles and the brazing composition is heated to a brazing temperature that is sufficient to melt the brazing composition in order to form a refractory joint, in which the non-reactive brazing composition is a binary alloy formed, as mass percentages, from 56% to 70% silicon and 44% to 30% yttrium.

The invention discloses a method for regenerating polyol by using waste polyurethane. In the method, fragments of polyurethane waste, an alcoholysis agent, a catalyst, an antioxidant and a treating agent are used as raw materials; and the method comprises the following reaction steps: (1) adding the alcoholysis agent in a reaction kettle, heating up to 200-220 DEG C under the protection of nitrogen, and adding the catalyst and antioxidant; (2) adding the fragments of polyurethane waste, and preserving the temperature for 1-5 hours; and (3) cooling to 80-150 DEG C, adding the treating agent, preserving the temperature for 1-3 hours to obtain a polyol liquid homogeneous phase mixture, wherein the fragments of polyurethane waste are added at least twice in the step (2). The method disclosed by the invention has high alcoholysis rate; the product has low viscosity, moderate reactivity and easiness for use; and the prepared polyurethane product has excellent performance.

The invention relates to a pre-treatment process method of high acid crude oil. The method comprises the following steps that high acid crude oil is treated by coupling deacidification and electro-desalting processes by combining chemical extraction and electro-desalting; a first level tank is taken as a deacidification and electro-desalting tank; a demulsifier and an extractant are injected before a crude oil electro-desalting static mixer; after being fully mixing with crude oil, the mixture enters into the first level desalting tank; generated naphthenate and salt-containing sewage in the crude oil are dissolved in the extractant; treated deacidified oil enters into second and third level desalting tanks after being mixed with the demulsifier and water through the static mixer for desalination and dehydration; treated crude oil enters into a subsequent heat exchange unit; after a period time of operation of an electro-desalting system, impurities such as mud in raw material oil are flushed by a non-stop back purge device to discharge mud-containing sewage out of the tank; an extract phase is acidified to separate out naphthenic acid which is further extracted and purified by light dydrocarbon, and the extractant is purified and recovered and recycled.

A method is described for assembling at least two parts made of silicon carbide based materials by non-reactive brazing in an oxidizing atmosphere, each of the parts comprising a surface to be assembled, wherein the parts are placed in contact with a non-reactive brazing composition, the assembly formed by the parts and the brazing composition is heated to a brazing temperature sufficient for completely or at least partially melting the brazing composition, or rendering the brazing composition viscous, and the parts and the brazing composition are cooled so as to form, after cooling the latter to ambient temperature, a moderately refractory joint. The non-reactive brazing composition is a composition A consisting of silica (SiO₂), alumina (Al₂O₃), and calcium oxide (CaO), or a composition B consisting of alumina (Al₂O₃), calcium oxide (CaO), and magnesium oxide (MgO), and, before heating the assembly formed by the parts and the brazing composition to the brazing temperature, a supply of silicon in a non-oxidized form is carried out on the surfaces to be assembled of the parts to be assembled, and/or on the surface layers comprising the surfaces to be assembled of the parts to be assembled, and/or in the brazing composition.

The invention provides a modified styrene-maleic anhydride copolymer which adopts the structural formula shown in the specification. The invention also provides a thermosetting resin composition including both the modified styrene-maleic anhydride copolymer and epoxy resin, and the composition is relatively low in dielectric constant and low in dielectric loss tangent and has excellent heat resistance, processing technology and storage performance. The invention further provides a prepreg and a laminate which are prepared from the thermosetting resin composition and both can be used as printed circuit substrate materials, PCBs and the like.

The invention discloses a composite reactive grey for printing and dyeing and a clean production process thereof. The composite reactive grey consists of active ingredients, namely a chromium grey dye component, a cobalt grey dye component and C.I. reactive black 5 with the structure shown in the specifications in a weight ratio of (10-20):(55-80):(5-10); and the dye has the characteristics of high solubility, particularly low temperature solubility, high fastness to light and chlorine, mild reactivity, low substantivity and high chromatic light controllability. The replacement of a reductivegrey dye under the common conditions can be met; printing and dyeing cost is reduced; printing and dyeing processes are simplified; energy conservation and emission reduction are realized; three-waste emission in dye production is reduced; and clean production is achieved.

The invention provides a terpolymer containing structural units represented by a general formula (I), a general formula (II) and a general formula (III). The invention also provides a thermosetting resin composition containing the terpolymer and epoxy resin. The composition has low dielectric constant, low dielectric loss tangent, and excellent heat resistance, processing manufacturability and storage performance. The invention also provides a prepreg and a laminate prepared from the thermosetting resin composition, and the thermosetting resin composition can be used in printed circuit substrate material and printed circuit board.

Disclosed is anthracite carbon foundry formed coke which solves the disadvantages of uneven granularity, insufficient oxygen-adding, high broken rate and environment pollution found in the formed coke in the prior art; the anthracite carbon foundry formed coke is characterized in that the anthracite or non-coking coal is used to produce the anthracite carbon foundry formed coke; the steps include that the raw coal is conveyed to the factory, crushed and grinded to powder; the binder is added to the grinded powder and the mixture is stirred under the cooling condition, and then stirred evenly after being heated; the mixture is conveyed to the pressing machine for the extruding formation; the formed material is conveyed to the carbonization chamber and then is processed with dry distillation and carbonization under the conditions of air-isolation and the temperature ranging from 950 DEG C-1050 DEG C; finally, the formed material is cooled and the finished product is outputted to be stored in the storehouse for sale; the process of comprehensive utilization of the coke-oven gas generated in the carbonization chamber is set for the lime joint production; the process of dust removal and desulfurization is set for the flue gas and SO2 in the exhausted gas; based on the special binder formula and the special product structure and compared with the traditional coking method, the anthracite carbon foundry formed coke has the advantages of high carbon content, high calorific value, low ash content and sulfur content, crush resistance, abrasion resistance, good intensity, moderate reactivity, high intensity after reaction, good cold and heat intensity, reasonable and simple structure, small investment, low expense and specially being applicable to the coking and the mechanical casting industries.

The invention discloses a novel composite active cardinal dye and a manufacturing method thereof. The composite active cardinal dye mainly comprises structural components shown in formula I, formula II and formula III, wherein the weight ratio of the structural components shown in formula I, formula II and formula III is (30-40): (30-40): (5-25). The dye disclosed by the invention can be used fordip dyeing, continuous pad dyeing and printing processes at 50-60 DEG C, and can be also used for cold pad batch dyeing; the dye has good color tone controllability, good dyeing build-up properties, high product solubility and good color fastness to chlorinated water; and the product performance of the dye is superior to that of the traditional active cardinal dye. Formula I, formula II and formula III are shown in the specification.

Process for the moderately refractory assembly of at least two articles made of silicon carbide-based materials by non-reactive brazing in an oxidizing atmosphere, in which the articles are placed in contact with a non-reactive brazing composition and the assembly formed by the articles and the brazing composition is heated in an oxidizing atmosphere at a brazing temperature sufficient to melt the brazing composition so as to form a moderately refractory joint, wherein the non-reactive brazing composition is a composition A composed of silica (SiO₂), alumina (Al₂O₃) and calcium oxide (CaO), or alternatively a composition B composed of alumina (Al₂O₃), calcium oxide (Cao) and magnesium oxide (MgO).

Brazing suspension, paste comprising a powder of said brazing composition and an organic binder.

Refractory joint and assembly.

The invention relates to a reactive golden yellow dye and a composite reactive brown dye. The reactive golden yellow dye is shown in a formula (I), while the composite reactive brown dye is prepared be compounding the reactive golden yellow dye shown in formula (I), C.I reactive orange 107, reactive dark blue M-R, C.I reactive blue 203, reactive dark red and reactive red SHE according to the mass ratio of (30-55): (5-12): (5-15): (5-15): (5-15): (5-15). The dyes can be used for dip dyeing, continuous pad dyeing, cold batching and shortened wet steaming processes, are low in directness, moderate in reactivity and high in product solubility, and have 1/1 dyeing depth, grade 5 of fastness to light, grade 4-5 of fastness to soaping, grade 4-5 of fastness to perspiration, grade 4 of fastness to chlorine water, grade 4-5 of fastness to dry rubbing, grade 4 of fastness to wet rubbing and grade 4 of fastness to ironing, and particularly, the phenomena of metamerism of redness and thermosensitive discoloration of a lamp A are improved obviously.

The invention discloses a preparation method of a paper compound surface sizing agent and provides a preparation method of a surface sizing agent with good combination property. The preparation method comprises the steps of: with polymers (dihydric alcohol and diisocyanate) as raw materials, adding a hydroxyl-containing modifying agent, stirring for reaction at a temperature of 80-90 DEG C and under the protection of an inert gas to prepare a waterborne polyurethane oligomer; adding a hydrophilic substance, stirring at a temperature of 80-90 DEG C for reacting for 2.5-3.5h to obtain a waterborne polyurethane prepolymer; cooling to 45-50 DEG C, adding a neutralizing agent and a cosolvent, stirring for reaction to ensure that the waterborne polyurethane prepolymer neutralizes to form a salt; cooling to 5-10 DEG C, sequentially adding water, a part of starch and a chain extender, then raising the temperature to 50-60 DEG C, reacting to prepare hydroxyl silicone oil modified waterborne polyurethane; and performing reduced pressure distillation to remove the cosolvent, adding the rest of starch, raising the temperature to 90 DEG C, and stirring for reaction to obtain the waterborne polyurethane/starch compound surface sizing agent. The preparation method is simple and is low in cost.

The invention discloses a preparation method of a wear-resistant, heat-insulation and corrosion-resistant powder coating. The powder coating is prepared from the following raw materials: benzoxazine resin, epoxy resin, chlorinated polyether, carboxylated-terminated acrylonitrile-polybutadiene rubber, a curing agent, barite powder and wollastonite powder. The wear-resistant, heat-insulation and corrosion-resistant powder coating can be prepared by processes such as melting, mixing and extruding, cooling for tabletting, crushing and sieving and has excellent wear and corrosion resistance and heat insulation properties, the surface of a processed coating meets the national and industrial standards on the aspects such as adhesive force, flexibility, impact strength, smoothness, hardness and chemical resistance, and the wear-resistant, heat-insulation and corrosion-resistant powder coating is low in curing temperature, convenient to use and capable of reducing the cost.

The invention discloses low-hydroxyl-value hydroxyl-terminated polyester resin for Tetramethoxymethylglycuril curable texture powder coating. The low-hydroxyl-value hydroxyl-terminated polyester resin is obtained by melt polycondensation of the following ingredients (by weight): 0-3% of trimethylol propane, 0-3% of 1,2,6-hexanetriol, 35-40% of dihydric alcohol, 43-52% of terephthalic acid, 5-14% of m-phthalic acid, 0-4% of succinic acid and 0.05-0.12% of a catalyst. The invention also discloses a preparation method of the polyester resin. The texture powder coating prepared by the use of the synthesized polyester resin has fine and strong three-dimensional coating texture and good mechanical property and weatherability.

The invention discloses a C2 post-hydrogenation acetylene removing method. A column top effluent from a deethanizer in a C2 post-hydrotreatment device is fed into a thermal insulation reactor for selective hydrogenation, and thus acetylene in the effluent can be removed. A Fe family selective hydrogenation catalyst is adopted as a hydrogenation catalyst, a high temperature resistant inorganic oxide is adopted as a carrier, and hydrogenation raw materials mainly consist of 0.98-2.2% of acetylene, 11.2-30.3% of ethane and 65.0-85.0% of ethylene. The reaction conditions are that the inlet temperature of a thermal insulating bed reactor is 40-100 DEG C, the reaction pressure is 1.5-2.5MPa, and the gas volume airspeed is 2000-10000 h<-1>. The C2 post-hydrogenation acetylene removing method disclosed by the invention is moderate in catalyst reaction activity, good in operation elasticity and good in ethylene selectivity, and the 'green oil' generation amount is far less than that of an acetylene removing method using a noble metal catalyst.

The invention discloses a composite reactive light yellow dye composition which mainly comprises a Formula I compound and a Formula II compound in a mole ratio of 1:(0.1-10), wherein Y is -SO3Na, and the Y group is meta-position or para-position. The dye can be used for a printing technique of an automatic sizing system, and the direct Rf value is 0.9; and the composite-structure bright yellow dye has the advantages of moderate reactivity and favorable color light controllability. The dye has favorable dye lifting power and high product solubility, the 2-DEG C solubility is greater than 200 g/L, and the dyeing deepness is 1/1. The fastness to light is Grade 6, the fastness to soaping is Grade 4-5, the fastness to perspiration is Grade 4-5, the fastness to chlorine water soaking is Grade 4, the fastness to dry rubbing is Grade 4-5, the fastness to wet rubbing is Grade 4, the fastness to ironing is Grade 4, and thus, the product has better properties than the traditional reactive light yellow dye. The dye has favorable printing lifting power, the strength is more than 2 times of the reactive light yellow K-6G, the printing color paste sewage is free of inorganic salts, and the content of hydrolytic dyes is low, thereby being beneficial to energy saving and environment friendliness.

The invention discloses a preparation method of a polymetal carbosilane precursor, which comprises the following steps: sequentially adding alkali metal and metallocene into an organic solvent in a protective atmosphere, then dropwise adding chlorosilane, carrying out first reaction, solid-liquid separation and solvent removal to obtain a reactant B, and then carrying out second reaction on the reactant B and a reactant A in the protective atmosphere to obtain the polymetal carbosilane precursor. And removing the solvent to obtain polymetal carbosilane, wherein the reactant A is liquid polysilicon carbosilane. According to the preparation method, a large amount of metal is introduced through the reaction of chlorosilane and metallocene, a reactant B which has high reaction activity and contains more Si-Si bonds is obtained at the same time, then the reactant B continues to react with liquid polysilicocarbosilane, and the obtained product has high metal content and good performance stability at the same time. And the distribution of metal elements is uniform, the metal content is adjustable, and the precursor does not contain oxygen.

The invention discloses a halogen-free resin composition. The halogen-free resin composition comprises the following components dispersing in an organic solvent, by weight: 5-10 parts of polyurethanemodified epoxy resin, 20-30 parts of multifunctional epoxy resin, 40-60 parts of a polyurethane and polyamide block copolymer, 10-20 parts of MQ resin, 5-10 parts of a curing agent, 0.2-0.5 part of acuring accelerator, and 15-20 parts of a phosphorus-containing flame retardant. The invention also discloses a flexible copper clad laminate prepared by using the halogen-free resin composition. The flexible copper clad laminate has excellent flexibility and folding resistance, low ion content, no dendritic crystallization during an ion migration test and good insulation property. Moreover, sincea toughening agent does not contain a saturated double bond, the flexible copper clad laminate has excellent aging resistance and can be applied in the field of high reliability requirements.

The invention discloses a composite waterproof structure and a preparation method thereof, and belongs to the field of building waterproof materials. The composite waterproof structure is prepared from a waterproof coil layer, a reaction type macromolecular elastic coating layer and a waterproof base layer in turn from top to bottom, wherein the waterproof coil layer is prepared from an upper surface layer and a self-sticking material layer in turn from top to bottom; the self-sticking layer is self-sticking polymer modified asphalt. According to the composite waterproof structure and the preparation method thereof disclosed by the invention, separation between the coating and the coil is avoided, and the waterproof effect is perfect.

The invention provides a terpolymer containing structural units represented by a general formula (I), a general formula (II) and a general formula (III). The terpolymer has appropriate reaction activity, so as to improve the processing and storage performance of a composition of the terpolymer and epoxy resin, and has excellent dielectric properties. The invention also provides a thermosetting resin composition containing the terpolymer and epoxy resin. The composition has low dielectric constant, low dielectric loss tangent, and excellent heat resistance, processing manufacturability and storage performance. The invention also provides a prepreg and a laminate prepared from the thermosetting resin composition, and the thermosetting resin composition can be used in printed circuit substrate material and printed circuit board.