74results about How to "Good dispersion performance" patented technology

The invention provides a method for preparing spherical superfine silver powder by using a chemical reduction method, using ascorbic acid to reduce silver nitrate and using gelatin as a dispersing agent. An ascorbic acid solution and a silver nitrate solution with certain concentrations are respectively prepared with the mole ratio of the amounts of the silver nitrate to the ascorbic acid of 2:1; the silver nitrate is dropwise added in the ascorbic acid solution while stirring, the gelatin is dropwise added when sediments start to generate, and the pH value of a reaction solution is regulated by ammonia water; the reaction solution is filtered and washed after titration, the sediments are taken out, dried in a drying oven and then is put in a muffle furnace to be heated to 350 DEC C, and then impurities are removed through heat preservation and thermal treatment. The prepared silver powder is in a spherical shape or a shape similar to a ball and has the advantages of smooth surface, less agglomeration and favorable dispersion; the impurity content is less than 5*10-4, the specific surface area is from 0.8 to 1.5 m2.g-1, the thermal gravitation is less than 2%, the tap density is about 4g.cm-3, and the particle size distribution is from 0.5 to 3 mum. The method can be used for producing electrode slurry for sheet-type elements, silver paste for the glass of saloon cars, and the like, and has important industrial application value.

The invention provides a starch-based graft copolymer coal water slurry dispersant and a preparation method thereof. The method comprises steps that: a 10% to 20% starch aqueous suspension is heated; an oxidizing agent which takes 0.1% to 5% of the mass of starch is added to the aqueous suspension of starch for carrying out an oxidization reaction for 10 to 60min; the mixture is heated to a temperature of 80 to 95 DEG C, and the mixture is gelatinized for 20 to 60min while maintaining the temperature; the temperature of the mixture is reduced to 40 to 70 DEG C, and meanwhile mixed monomer and an initiator are dropped into the mixture; the mixture is heated to a temperature of 80 to 95 DEG C, and is subject to a reaction while maintaining the temperature for 20 to 120min; the temperature is reduced to 20 to 40 DEG C, and the pH value of the mixture is regulated to 7-9 by using a sodium hydroxide solution. The dispersant is a viscous emulsion with a color of light yellow to off-white, a solid content of 25 to 35%, a pH value of 7 to 9, and a viscosity of 30 to 150mPa.s. According to the invention, strong dispersibility of styrene and carboxylic salt is fully utilized. Hydrogen bonding effect of polyhydroxy on starch straight chains upon hydrones is adopted, such that the storage stability of the coal water slurry is improved, the dispersibility of the coal water slurry is good, and the stationary phase of the coal water slurry is long-lasting.

The invention discloses a viscosity reduction type polycarboxylate concrete admixture and a preparation method thereof. The polycarboxylate concrete admixture contains the following synthetic raw materials: low molecular weight segmented modified unsaturated polyoxyethylene ether comonomer A, an unsaturated carboxylic acid comonomer B, alkylphenol ethoxylate C, an initiator, a reducing agent, a chain transfer agent, caustic soda liquid and water, wherein the mass ratio of the synthetic raw materials is as follows: a ratio of the low molecular weight segmented modified unsaturated polyoxyethylene ether comonomer A to the unsaturated carboxylic acid comonomer B to the alkylphenol ethoxylate C to the initiator to the reducing agent to the chain transfer agent to the caustic soda liquid to the water is (320-420):(24-36):(3-10):(1-5):(0.5-3):(0.5-4):(20-50):(400-500). The viscosity reduction type polycarboxylate concrete admixture disclosed by the invention has the characteristics of excellent dispersion property, obvious viscosity reduction effect, and excellent cement adaptability, and the product is simple in process, safe, reliable and stable in performance, does not contain any chloride ion, does not have any Corrosion damage on reinforcement and is environment-friendly.

The invention belongs to the technical field of carbon nanometer materials, and discloses an alkali lignin carbon nanometer sphere, a preparation method and an application thereof. The preparation method is as follows: using N, N-dimethylformamide or glacial acetic acid as a solvent, configuring an alkali lignin electrostatic spray solution with a mass fraction of 20% to 50%, and then transferring it to an electrostatic spraying device , the alkali lignin nanospheres are obtained by electrostatic spraying, and then the alkali lignin nanospheres are pre-oxidized at a temperature of 250-280°C, and finally carbonized at a temperature of 400-900°C to obtain alkali lignin carbon nanospheres. The invention uses low-cost, renewable and degradable commercial alkali lignin as a carbon source, and has the advantages of energy saving and environmental protection. The obtained alkali lignin carbon nano-microspheres have good microscopic appearance and good dispersion performance, which improves the use performance of the lignin carbon material.

The invention provides a polyacrylate adhesive containing a traditional Chinese medicine oil microcapsule, and aims to solve the problem that an adhesive needs to be additionally added into an existing traditional Chinese medicine oil microcapsule in a sorting process of textiles. The polyacrylate adhesive containing the traditional Chinese medicine oil microcapsule is a compound of the traditional Chinese medicine oil microcapsule and the polyacrylate emulsion. The preparation method of the polyacrylate adhesive containing the traditional Chinese medicine oil microcapsule comprises the steps that the traditional Chinese medicine oil microcapsule of which the wall material contains (methyl) acrylic acid is prepared by utilizing a complex coacervation method; and the polyacrylate adhesive containing the traditional Chinese medicine oil microcapsule is prepared by using an in-situ emulsion polymerization method. The polyacrylate adhesive containing the traditional Chinese medicine oil microcapsule can be applied in the textiles, and be directly used after being diluted according to the technological requirements and the adhesive is not additionally added; the sorted textiles have a good antibacterial effect and are in wash durability.

The invention relates to a coating modification method of a carboxylic polymer to nano calcium carbonate. In the invention, a carboxylic butylbenzene polymer or carboxylic polybutadiene are adopted, nano CaCO3 is coated and modified by a direct blending method, pulp after being coated is filtered, a filter cake is dried, and then a product can be obtained. The edges of coated particles are passivated, and the particles approach to a spherical shape, are not allowed to aggregate and have good stability. The surface is changed from a hydrophilic state into an oily state, and the dispersivity ina non-polar solvent is improved. The invention has simple operation and easy industrialized production.

The invention relates to an iron-oxide-ore-containing heavy oil hydrogenation catalyst, and preparation and application thereof. The heavy oil hydrogenation catalyst is composed of iron oxide ore powder and a dispersion medium, wherein the iron oxide ore powder accounts for 5-70 wt% of the catalyst; and on the basis of the dispersion medium, the dispersion medium contains 80-99 wt% of base oil, 0.05-10 wt% of solid thickening rheological agent and 0.05-10 wt% of polar additive. The heavy oil hydrogenation catalyst provided by the invention has the advantages of high catalytic-activity solid content, favorable mixing capacity with heavy oil raw oil, and favorable catalytic effect in heavy oil hydrocracking or modification in a suspension bed or slurry-state bed.

The present invention discloses a modified nanometer chlorapatite and a preparation method thereof, wherein the modified nanometer chlorapatite comprises nanometer chlorapatite and sodium lauryl sulfate, the sodium lauryl sulfate is modified on the nanometer chlorapatite surface, and a mass ratio of the sodium lauryl sulfate to the nanometer chlorapatite is 7-15:1. The modified nanometer chlorapatite preparation method comprises: under a stirring condition, adding a CaCl2 solution to a sodium lauryl sulfate solution in a dropwise manner, adding a Na3PO4 solution to the obtained mixed solution in a dropwise manner, and adjusting the pH value to 8.0-10.0 so as to prepare the product. The modified nanometer chlorapatite the present invention has advantages of large specific surface area, good dispersion property, high stability, and the like. In addition, the modified nanometer chlorapatite preparation cost is low, no secondary pollution is generated to the environment, and the method is suitable for large-scale use.

The invention provides a linen dedusting agent capable of removing multiple metal ions scales. The linen dedusting agent comprises the following components in percentage by weight: 20-30% of sodium gluconate, 20-27% of nitrilotriacetic acid trisodium salt, 5-10% of polyaspartic acid, 4-6% of hydroxyacetic acid, 5-8% of sodium citrate, 7-12% of maleic acid-crylic acid copolymer, 10-20% of sodium fluosilicate, 4-6% of ethylene diamine tetraacetic acid (EDTA)-tetrasodium, 2-4% of citric acid, 0.1-0.5% of whitening agent and 0.1-1% of essence. The invention provides a washing auxiliary which is used for a post-treatment stage after main washing is completed so as to remove the metal ion scales which are generated in the washing process and adhered on linen in order to soften the linen, thereby effectively prolonging the service life of the linen.

The invention relates to a method for producing high-intensity fine denier fiber from a scrap material and a returned material of polyester bottles. The method is characterized by comprising the following steps of: after the material is dried for the second time and the water content of the material is controlled below 80 ppm, adding the following chemical additives in percentage by mass: 0.02 to 0.04 percent of OB-1 brightening agent, 0.02 to 0.04 percent of barium stearate and 0.04 to 0.06 percent of titanium white into the material, uniformly stirring the mixture, and fusing and stirring the mixture in a screw rod at a high temperature and extruding the mixture; arranging a mixing region at the tail end of a screw extruder, wherein the length of the mixing region H is 3 to 4 times the sleeve diameter D of the screw extruder; and raising the temperature of a heating region of a screw rod sleeve from conventionally 260-310 DEG C to 285-340 DEG C. A product produced by the method belongs to high-intensity fine denier fiber; the linear density of the fiber is less than or equal to 1.55 dtex and the breaking strength of the fiber is CN / dtex is more than or equal to 5.8; and the quality of the product reaches or is close to the quality standard of similar chopped fiber produced by melt direct spinning. The method has the advantages of reliving the situation of material shortage for users, saving the consumption of national resource consumptions, fulfilling the aim of mutual benefits and bringing considerable economic benefit to enterprises.

The invention belongs to the technical field of drilling fluid additives, and in particular relates to an oil base drilling fluid fracture leakage stoppage formula, comprising a component A and a component B, wherein the component A is composed of a fiber material of which the diameter is 0.01-1.00mm and the length is 0.50-10.00cm, and the component B is composed of different lipophilic rigid granular materials. The oil base drilling fluid fracture leakage stoppage formula provided by the invention can significantly improve the leakage stoppage success rate of oil base drilling fluid and enhance the load bearing capacity of a stratum; and for a crack of 1-5mm, the added amount of a leaking stoppage agent is less than 7%, and the compression strength can reach 7MPa. In comparison with a domestic similar product, the formula has the technical characteristic of higher fracture leakage stoppage compression strength.

The invention provides an asphalt material with a high-strength structure and a preparation method thereof, which aim at improving the track resistance, the, water-resistant damage performance and low-temperature cracking resistant performance of the asphalt pavement. The asphalt material is characterized by comprising the following components by the weight portion: 25 to 30 of new polyolefine material, 57 to 67 of old polyolefine material, 3 to 5 of inorganic filler, 0.8 to 1 of ultrafine carbon black particles, 2 to 4.5 of organic anhydride and 0.1 to 0.15 of age inhibitor. The asphalt material with the high-strength structure, which is prepared by the method, has lower production cost and favorable dispersion performance, and can markedly improve the modulus of the asphalt mixing material.

The invention discloses a preparation method of a silicon carbide ceramic pot using graphene to enhance heat conductivity. The preparation method comprises the following steps of according to scientific and reasonable component proportional ratio, compounding silicon carbide micropowder, boron carbide micropowder, liquid phenolic resin, and graphene component; performing ball milling, granulating, isostatic pressing forming, non-pressure sintering and the like, so as to obtain the silicon carbide ceramic pot. The silicon carbide ceramic pot has the advantages that the density of a prepared blank is large, the uniformity is good, the strength is high, and the sintering can be performed through simple drying; by adopting the non-pressure sintering, the energy consumption is decreased. The preparation method has the advantages that the method is simple, the industrial control is convenient, the raw material cost is low and the obtaining is easy, and the non-toxic and non-harmful ceramic pot which can be in direct contact with food can be prepared; the heat conductivity is higher, the boiling time of foods is accelerated, and the energy-saving effect is realized.

The invention relates to a preparation method of iron nanoparticles, in particular to a preparation method of ClO3- ionic liquid dispersed iron nanoparticles. According to the method, by adding certain dispersant, soluble ferrous or ferric iron salt is dissolved in distilled water (or mixture of distilled water and ethyl alcohol) to form iron salt solution by means of liquid-phase chemical reduction; reducing agent with strong reducibility, such as hydroboron, is directly used to reduce iron ions into zero-valent iron; a product is filtered and washed and vacuum-dried so as to obtain well-dispersible iron nano-powder material with the nano-micro structure. The iron nanoparticles prepared are spherical with small diameter and narrow particle size range and have certain oxidation resistance. The iron nanoparticles prepared by the method are well dispersible, and the problem that iron nanoparticles agglomerate easily is solved effectively. The products are high in purity and small and even in particle size, the process is simple and easy to control, the preparation method is performed under normal temperature and normal pressure, and actual production needs are met.

The invention relates to a manufacturing method of an enhanced type flam-retardant anti-aging polyester film. Magnesium hydrate crystal whisker, calcium carbonate crystal whisker, barium sulfate, microencapsulation red phosphorus fire retardant and the like, which have flame-retardant and material-enhancing functions, are ground with ethylene glycol, p-hydroxybenzoic acid and the like to obtain flame-retardant and function-enhancing alcohol; an anti-aging material triazine-5 light stabilizer, rutile titanium dioxide, a high-temperature antioxygen and a UV-327 ultraviolet light absorber are mixed with ethylene glycol and the like, and are ground to react to obtain a compound anti-aging agent; purified terephthalic acid is mixed with the ethylene glycol and the flame-retardant function-enhancing alcohol according to a certain proportion, and is subjected to copolycondensation; the compound anti-agnign agent is continuously added in the later stage of esterification reaction to obtain enhanced type flame-retardant anti-aging polyester; the enhanced type flame-retardant anti-aging polyester is stretched in a dual-axis mode and is thermally shaped to be manufactured into the enhanced type flame-retardant anti-aging polyester film.

The invention discloses colloidal gold partly modified by polyethylene glycol and a preparation method thereof. The preparation method comprises the following steps of (1) preparing the colloidal gold; (2) fixing nanogold on a glass solid phase carrier; (3) modifying the colloidal gold by using the polyethylene glycol; and (4) preparing a solution of the colloidal gold partly modified by the polyethylene glycol. 80-95% of the surface region of the colloidal gold prepared by the method is covered by the polyethylene glycol, and the other 5-20% of the surface region is still a bare gold surface. The stability of the colloidal gold partly modified by the polyethylene glycol prepared by the preparation method in complex mediums and the selective recognition of the colloidal gold to target proteins are obviously enhanced. Through asymmetrically modifying the colloidal gold, directional adjustment and control of reactions can be realized, and the uncontrollable agglomeration and sedimentation problems caused by isotropic colloidal gold in traditional method are also solved; and the colloidal gold partly modified by the polyethylene glycol is expected to be widely used in nano-assembling and biosensing fields.

The invention discloses a spiral carbon nanotube hybridized graphene composite plastic and a preparation method thereof, belonging to the field of composite material manufacturing. Aiming at solving the problems of uncontrollable conductivity and mechanical properties of graphene carbon nanotube hybrid polymers, the invention provides a spiral carbon nanotube hybridized graphene composite plasticand a preparation method thereof, and in particular, provides a formula, preparation and application of a composite plastic material prepared from at least one of polyethylene, polypropylene, polyvinyl chloride, polystyrene, ethylene-vinyl acetate copolymer, nylon, polyester and ABS. Carbon nanotube catalytic elements are supported on graphene to prepare a catalyst, spiral carbon nanotube hybridized graphene is prepared by chemical vapor deposition, and then a spiral carbon nanotube hybridized graphene complex with excellent phase connection is prepared and applied to the plastic. The method is suitable for manufacturing and processing of compound plastics.

The invention relates to a pyrite-containing heavy oil hydrogenation catalyst, and preparation and application thereof. The heavy oil hydrogenation catalyst is composed of pyrite powder and a dispersion medium, wherein the pyrite powder accounts for 5-70 wt% of the catalyst; and on the basis of the dispersion medium, the dispersion medium contains 80-99% of base oil, 0.05-10 wt% of surfactant, 0.05-10 wt% of solid thickening rheological agent and 0.5-2 wt% of oleic acid. The heavy oil hydrogenation catalyst provided by the invention has the advantages of high catalytic-activity solid content, favorable mixing capacity with heavy oil raw oil, and favorable catalytic effect in heavy oil hydrocracking or modification in a suspension bed or slurry-state bed.

The invention discloses an alkaline phosphatase micro- / nano-particle which comprises alkaline phosphatase as drug and adjuvants at weight ratio of 1:100-100:1. The adjuvants comprise stabilizer and dispersant at weight ratio of 1:100-100:1. The micro- / nano-particle has yield of 20-98%, average particle size of 0.1-10 micrometer, bio-active drug activity retention rate of 50-100%, and in-vitro lung deposition efficiency of 10-98%. The micro- / nano-particle with small and uniform particle size and good dispersivity can be delivered into lung in multiple lung inhalation preparation forms, can effectively maintain drug bioactivity, and has excellent lung inhalation efficiency, no gastrointestinal tract degradation effect and no liver first pass effect during application course, and good patient compliance due to non-invasive treatment manner.

The invention relates to a colour master batch with a low combustion speed. The colour master batch is composed of the following components in percentage by weight: 20-70% of styrene copolymer, 0.01-70% of toner, 1-20% of dispersant, 0-50% of synergist and 0-40% of filler, wherein the toner is one or more of inorganic pigments, organic pigments or dyes, and the temperature resistances of the inorganic pigments, organic pigments or dyes are not less than 200 DEG C. When the colour master batch provided by the invention is applied to the colouring of ABS products, the combustion speeds of the ABS products achieve the standards of UL94 HB, and the ABS products are excellent in dispersibility and free from colour dots and colour lines; master batches with different colours can be prepared as needed; and meanwhile, the colour master batch has a low influence on the mechanical properties of the products.

The invention discloses a preparation method of modified superfine graphene. The preparation method includes the following steps that (1), graphene is subjected to grinding, specifically, the grapheme is placed in a grinder and is ground to obtain graphene pasty material; (2), the graphene pasty material is subjected to stage treatment, specifically, the graphene pasty material is put into a high-speed centrifugal settling type grader, the graphene pasty material whose particle diameter is less than or equal to 1 [mu]m is concentrated in the middle of the grader, and is stored in a storage tank after being led out; and (3), the graphene pasty material whose particle diameter is less than or equal to 1 [mu]m is subjected to kneading treatment, specifically, the graphene pasty material whose particle diameter is less than or equal to 1 [mu]m is put into a kneading reaction device, a surface treating agent is added, the kneading treatment is conducted, the superfine graphene is obtained after being kneaded, and in the period, the accumulating density of superfine graphene powder is controlled within 0.5-1.2. According to the preparation method, the prepared modified superfine graphene particles have the characteristics of being good in dispersing performance, low in accumulating density and the like. Partial shielding and disturbing to electromagnetic waves and wireless signals are achieved, and the effect of gaining advantages in information competition is realized.

The invention discloses random-texture pigment liquid for an air die material. The pigment liquid consists of the following components in parts by weight: 100 parts of PVC (Polyvinyl Chloride) paste resin, 50-60 parts of a plasticizer, 10-20 parts of calcium carbonate, 1-5 parts of fumed silica, 2-3 parts of a liquid barium-zinc stabilizer, 10-30 parts of titanium dioxide paste, 5-20 parts of color paste and 0.5-3 parts of an adhesive. The pigment liquid for the random texture air die material, which is disclosed by the invention, has the advantages of high dispersity, freeness from color strips, weather resistance and resistance to color fading and color change; meanwhile, after the content of the pigment liquid is adjusted, the pigment liquid can be taken as background pigment liquid as well as texture pigment liquid as well as pigment liquid for the air die material. The background pigment liquid and the texture pigment liquid are used in a matching manner, so that the prepared air die material is high in surface color contrast, natural and clear strips and freeness from air bubbles on the surface.

The invention relates to the field of inorganic chemical synthesis and discloses a preparation process for anhydrous magnesium carbonate. According to the process disclosed by the invention, magnesium carbonate prepared by way of synchronous charge is added into a high-temperature and high-pressure reaction kettle for hydro-thermal treatment to obtain an anhydrous magnesium carbonate product. According to the process disclosed by the invention, used raw materials are easily available and are low in price, so that the preparation process is easily amplified for industrial production. The process disclosed by the invention is reasonable, and the product is wide in application field and huge in market potential, so that the preparation process has remarkable economical and social benefits.

The invention provides a dispersible ethylene-propylene copolymer and a preparation method thereof. The dispersible ethylene-propylene copolymer comprises, by weight, 90-99.7% of an anhydride group-grafted ethylene-propylene copolymer and 0.3-10% of N-(1-naphthyl)ethylenediamine and its derivatives. The preparation method comprises that the anhydride group-grafted ethylene-propylene copolymer and N-(1-naphthyl)ethylenediamine and its derivatives undergo a reaction in the presence of base oil to produce a glue solution containing the dispersible ethylene-propylene copolymer. The preparation method has the advantages that the product color is not changed easily by oxidization, amide residues can be removed by reduced pressure distillation, an after-treatment reaction is avoided, preparation processes are simple, and energy is saved. The dispersible ethylene-propylene copolymer can be used as a dispersion viscosity index improver and can be used in lubricating oil. Through use of the dispersible ethylene-propylene copolymer, oil products have excellent dispersion performances.

The invention relates to the technical field of building additives and in particular to a low-surface tension hyperbranched shrinkage reduction type polycarboxylate superplasticizer and a preparationmethod thereof. The preparation method comprises the following steps: putting an unsaturated polyether, a polyhydroxy polymer and a hyperbranched shrinkage reduction functional monomer and water intoa container, mixing at 20-60 DEG C, adding an initiator solution, a chain transfer agent solution and an unsaturated acid solution, keeping the temperature for a certain time, and adjusting the pH value of the obtained reaction product to 6.0-7.0 by using an alkali substance, thereby obtaining the low-surface tension hyperbranched shrinkage reduction type polycarboxylate superplasticizer. As a great amount of the shrinkage reduction functional monomer is introduced into a polycarboxylic acid molecular structure through copolymerization, the polycarboxylic acid molecular structure has a shrinkage reduction function chain segment, a steric hindrance segment and an adsorption group segment, the prepared superplasticizer product has low surface tension, unification of shrinkage reduction and dispersing performance of concrete can be achieved with a low doping amount, the concrete can be prevented from shrinkage cracking, then the durability of the concrete can be improved, and practical application values are great.

The invention discloses a novel asphalt modifier. The novel asphalt modifier is prepared from following raw materials, by weight, 1.2 to 2.8 parts of polyamide, 1.5 to 3 parts of aramid fiber, 2.3 to 3.7 parts of decabromodiphenyl ether, 5 to 10 parts of ethanol, 1.2 to 1.8 parts of red phosphorus, 0.8 to 1.7 parts of acetic acid lignin, and 0.5 to 1.2 parts of tartaric acid. The novel asphalt modifier is suitable for all petroleum asphalt; adding amount is small; adding of the novel asphalt modifier with an amount accounts for 2 to 3% of the amount of asphalt is capable of achieving excellent viscosity reduction and modification effects; mixing is convenient; separation is not caused; no special equipment is needed; dispersity is excellent; acid resistance, alkali resistance, and water resistance are excellent; the novel asphalt modifier is capable of resisting high temperature rut and low temperature cracking; construction workability is high; paving temperature can be reduced about 30 DEG C; adhesive force on aggregate is increased; toxic dust emission is reduced; the novel asphalt modifier is beneficial for environment protection, can be used for improving working environment of operators, reducing labor intensity, and is beneficial for health of operators.

The invention belongs to the technical field of concrete, and particularly relates to a high-belite sulphoaluminate cement-based hardener for a concrete floor and a preparation method of the high-belite sulphoaluminate cement-based hardener. The hardener is prepared by mixing and stirring the following materials in percentage by weight for reaction: 10%-20% of high-belite sulphoaluminate cement, 60%-80% of aggregate, 3%-5% of kaolin, 1%-2% of lime, 5%-10% of other mineral additives, 0.5%-2% of rubber powder, 0.05%-0.1% of retarder, 0.05%-0.1% of a water reducing agent and 0-3% of a pigment. The hardener prepared by the method breaks through the limitation of applying a sulphoaluminate cement-based hardener to Portland cement-based concrete; the problem of plastic cracks on the surface of an existing cement-based wear-resistant floor is solved. The prepared hardener has ultrahigh strength and surface hardness and is good in dispersing performance, the compatibility and binding force ofall the raw materials are greatly improved, the performance is enhanced, and the ultrahigh bonding strength of a wear-resisting layer and a base layer is achieved.

The invention provides a super-branched chain reverse osmosis scale inhibitor with a net structure. The super-branched chain reverse osmosis scale inhibitor is characterized by being prepared from substances containing the following components: the mass ratio of an acrylic acid-2-acrylamido-2-methylpropane sulfonic acid copolymer to a mixture of polyamino polyether methylene phosphonate and organic phosphine derivatives to tricarboxylic acid is (2-2.5):1:(0.5-1); the mass of water is 1-1.5 times as much as the sum of masses of the acrylic acid-2-acrylamido-2-methylpropane sulfonic acid copolymer, the mixture of polyamino polyether methylene phosphonate and organic phosphine derivatives and tricarboxylic acid; the mass of a crosslinking agent is 0.5-1% of the mass of the water; and the concentration of an organic acid catalyst in the water is 0.5-1 mol / L. A scale inhibitor is capable of effectively preventing carbonate, sulfate, metal oxide and silicon dioxide from blocking a reverse osmosis membrane and effectively realizing sterilization.

The invention discloses a novel piperazine pyrophosphate flame retardant and a preparation method thereof. The preparation method comprises the following steps: 1, adding distilled water, piperazinyl monomers and phosphoric acid into a reaction kettle in parts by mass, heating a reaction solution to 80-90 DEG C and reacting for 2h; reducing the temperature to 0-5 DEG C, separating out white crystals, and obtaining pyrophosphate piperazine powder; and carrying out surface polymerization reaction on the piperazine pyrophosphate, copper acrylate and (2, 7-octadiene-1-yl) succinic anhydride to obtain the novel piperazine pyrophosphate flame retardant.