516results about How to "Low oil absorption" patented technology

The invention discloses a preparation method of nano-calcium carbonate SCC-2 special for a silicone sealant, belonging to the technical field of inorganic chemical industry. According to an adopted technical scheme, the method comprises the following steps of: calcining limestone, crushing to obtain CaO; digesting, refining and aging the CaO in a hot state in the ratio of 1:4.8 of CaO to H2O; adding 1 percent of white granulated sugar crystal form control agent for undergoing a carbonation reaction to obtain CaCO3 slurry; performing activation surface treatment; and dehydrating, drying, crushing and degrading to obtain a nano-active CaCO3 product of 60-100 nanometers. The crystal form, size, regularity, oil absorption value and pH value of CaCO3 are controlled, so that 'hard aggregation' among particles is avoided from a surface modification production process, and the product has low oil absorption value and high bulk specific weight and has high dispersity in polymers.

The invention belongs to the field of chemical industry, and particularly discloses white finish coat photocurable UV (ultraviolet) paint and a preparation method thereof. The photocurable UV paint comprises the following components in percentage by weight: 20-60% of epoxy acrylate, 20-60% of polyurethane acrylate, 2-5% of phenyl acetone photoinitiator, 0.2-1% of diphenyl phosphine oxide photoinitiator, 0.2-1% of dispersant, 0.2-1% of leveling agent, 1-40% of titanium white TiO2, 5-15% of two-functional-group reactive diluent and 5-30% of three-functional-group reactive diluent. The paint has the characteristics of favorable gloss, adhesive force and leveling property, thus ensuring that the white UV paint can be better applied.

A substantially white powder for use as a filler and/or extender derived from by-products of manufacturing vitreous low alkali, low iron glass fibers, and a method for producing the powder. The filler has very low alkalinity and by virtue of its being essentially free of crystalline silica is non-hazardous to health and therefore safe for consumer-based and industrial-based uses.

The invention belongs to the field of coatings and particularly relates to an odorless and wear-resisting smooth UV (ultraviolet) matt finish paint coating and a preparation method thereof. The odorless and wear-resisting smooth UV matt finish paint coating comprises components in percentage by weight as follows: 25%-50% of hexa-functional polyurethane acrylate prepolymers, 15%-50% of trifunctional modified polyurethane acrylate prepolymers, 15%-50% of acrylate monomers, 1%-10% of a photoinitiator, 0.2%-2% of a wetting dispersant, 0.2%-1% of a leveling agent, 0.2%-0.5% of a defoaming agent and 1%-15% of a matting agent. According to the odorless and wear-resisting smooth UV matt finish paint coating, the technical problems that a pungent smell is left, wetting of the matting agent is difficult, matting is difficult, a paint film is prone to floating and the like after curing of a conventional UV matt finish paint coating are solved, and meanwhile, the defect of crispness of the paint film caused by improvement of the wear resistance of the conventional UV matt finish paint coating is overcome.

Disclosed are methods of processing kaolin to produce ultrafine hydrous kaolin. The methods involve processing gray crude kaolin by subjecting the kaolin crude to flotation and then centrifuging the kaolin to provide a fine stream that is subject to refinement. Also disclosed are systems for the automated processing of gray crude kaolin to produce the ultrafine hydrous kaolin and paint compositions that contain the ultrafine hydrous kaolin.

The invention discloses low-viscosity active calcium carbonate, a preparation method and application thereof. The preparation method comprises the following steps: (1) calcium carbonate is heated up to 100-120 DEG C in a high-speed stirrer or a mixer, and then a surface conditioning agent containing 0.1-0.5 percent of calcium carbonate according to the weight is added and mixed at a high speed for 3-5 minutes; (2) fatty alcohol polyoxyethylene ether containing 0.3-1.0 percent of calcium carbonate according to the weight is added at 130-140 DEG C, mixed at a high speed for 3-5 minutes and cooled; and (3) the mixture is sieved so as to obtain the low-viscosity active calcium carbonate. The active calcium carbonate prepared by the method can be applied to PVC resin leather. When the calcium carbonate is applied to PVC paste resin for reducing the viscosity of the PVC paste resin system, 20-25 percent of the dosage of dioctylphthalate (DOP) which is a plasticizing agent can be reduced or 15-20 percent of the filler content of the calcium carbonate can be improved, thereby reducing the production cost of the PVC resin leather.

The invention discloses a preparation method of a special titanium dioxide for an oily system. The method comprises the following steps: 1, pulping to prepare a titanium dioxide suspension slurry, adding a dispersant, dispersing, and grinding; 2, diluting the ground titanium dioxide suspension slurry, and filtering; 3, adding a zirconium compound, curing, and depositing; 4, adding an aluminum compound, curing, and depositing; 5, adjusting the pH value, and curing; and 6, washing, drying, and carrying out airflow crushing. The method allows the surface of a titanium dioxide particle to be respectively coated with a zirconium oxide film and an alumina film inside out and a silane coupling agent hydrolysate to be adopted to carry out organic treatment, so the special titanium dioxide has the advantages of substantially-increased weather resistance, lipophilicity and luster, low oil absorption, good dispersity, realization of the hiding capability same to import titanium dioxide, high contrast rate, good temperature resistance, and no ink layer yellowing.

The invention provides single-component addition type high-temperature-resistant high-thermal-conductivity silica gel and a preparation method thereof. The single-component addition type high-temperature-resistant high-thermal-conductivity silica gel is prepared from the following raw materials in parts by weight: 80 to 100 parts of vinyl silicone oil, 0.1 to 5 parts of cross-linking agent hydrogen-containing silicone oil, 500 to 2000 parts of a thermal-conductive filler, 1 to 20 parts of a treating agent, 1 to 4 parts of a catalyst and 1 to 8 parts of a pigment, and the hydrogen-containing silicone oil comprises at least one of terminated hydrogen-containing polysiloxane and side hydrogen-containing polysiloxane; and the hydrogen content of the end hydrogen-containing polysiloxane is 0.16 to 3.00 mmol/g, and the hydrogen content of the side hydrogen-containing polysiloxane is 0.9 to 9 mmol/g. Compared with silicone grease and silicon gaskets which are frequently used in the market at present, the single-component addition type high-temperature-resistant high-thermal-conductivity silica gel provided by the invention has the advantages of higher heat conductivity coefficient, higher bearing temperature, almost unchanged thermal resistance after long-time aging and the like, and further ensures that a heat-conducting interface material always keeps high heat-conducting efficiency in a long-term use process.

The present invention provides one kind of antiseptic and antistatic terrace paint and its preparation process. The paint includes two components, component A and component B. The component A includes water-thinned epoxy curing agent, water, defoaming agent, wetting agent, leveling agent, anticracking agent, stuffing, pigment and color paste; and the component B includes water-thinned epoxy resin emulsion, antiseptic and antistatic agent and water. The preparation process includes preparing the component A through high speed dispersing, grinding, filtering and other steps; and preparing the component B through low speed dispersing, filtering and other steps. The antiseptic and antistatic terrace paint has excellent and lasting antiseptic and antistatic performance, ideal environment friendly performance, fireproof performance, waterproof performance, high chemical corrosion resistance and other advantages.

The invention relates to a method for preparing silver powder for a touch screen silver paste and belongs to the technical field of preparation of conductive metal powder. The method comprises the following steps: using silver nitrate as a raw material and controlling the speed of liquid phase reduction reaction by regulating the process conditions of reaction temperature, charging manner and charging speed so as to prepare approximately spherical or spherical particle reduced silver powder with a particle size of 300 nm to 800 nm; sufficiently stirring and modifying the silver powder in absolute ethyl alcohol solution containing two modifiers of oleic acid, stearic acid, hexadecanol, a polyacrylate dispersing agent and a graft copolymer dispersing agent, carrying out batching on the obtained modified silver powder and phi3 stainless steel beads according to a mass ratio of 1:10 after drying at a temperature of 60 DEG C, and grinding for 10 to 24 hours; and after finishing grinding, carrying out bead and material separation, sieving the obtained silver powder by 300 meshes to obtain the high dispersion approximately spherical or spherical silver powder with D50 of 1.5 to 2.5mum and tap density of 4.0 to 6.0 g/cm<3>. The silver powder prepared by the method disclosed by the invention has high crystallinity, is suitable for an addition volume of silver of 70 to 85 percent and can be used for printing capacitive screen silver paste of a thin wire with a specification below 80 mum.

The invention relates to a meta titanate treatment method, comprising the following steps of: pulping metatitanic acid; adding an alkaline compound into the metatitanic acid pulp until the pH value is above 3; filtering and washing; adding dissoluble aluminum salt, dissoluble phosphate, dissoluble potassium-containing compounds and zinc-containing compounds into a filter cake and mixing uniformly; and calcining and crushing to obtain titanium dioxide. Compared with the prior art, the meta titanate treatment method provided by the invention has the advantages that the energy consumption is reduced; the production efficiency is improved; and the mellowness of the titanium dioxide is improved.

The invention discloses a method for modifying the surface of nano calcium carbonate. The method comprises the steps that 1, lime milk is added to a bubbling carbonatation reaction kettle, mixed gas containing carbon dioxide is introduced to the reaction kettle for a carbonatation reaction, carbonatation is conducted till the pH is equal to 7.0, carbonatation is completed, and a nano calcium carbonate suspension solution is obtained; 2, a stabilizer is added to the nano calcium carbonate suspension solution, the temperature is controlled within 50-60 DEG C, and heat preservation is conducted for 20-30 min; 3, a fatty acid modifier is heated and melted in water, an emulsifier is added to the fatty acid modifier, stirring is conducted for 10-30 min, and a modifier emulsion is obtained; 4, the nano calcium carbonate suspension solution obtained in the second step is added to the modifier emulsion, stirring is conducted for 30-60 min, and then through filter-pressing dehydration, drying and smashing, a nano calcium carbonate product is obtained. The prepared nano calcium carbonate has the advantages of good dispersity and processability, low oil absorption value, high thixotropy and activation rate, good stability, pH value close to neutral and the like. The method is low in production cost and simple in technology, facilitates industrial production and has good economic, social and ecological benefits.

The invention belongs to the technical field of silicon dioxide, and particularly relates to a preparation method of low-specific-surface-area high-oil-absorption-value friction type silicon dioxide.The preparation method comprises the steps that S1, 8-12 m<3> of ethanol aqueous solution is injected and heated to 60-70 DEG C, and stirring starts; S2, water glass and sulfuric acid are added dropwise to carry out a parallel flow reaction, the pH value in the reaction process is controlled to be 6.0-6.8, meanwhile, absolute ethyl alcohol is added every 5-10 minutes in the reaction process to keep the volume ratio of ethyl alcohol to water in a reaction system to be 1:(3-7), after the water glass is dropwise added, dropwise addition of sulfuric acid is stopped, and stirring continues; S3, stirring and heating are stopped, aging is conducted for one hour, and pressure filtration, washing, drying and crushing are conducted on the on formed silicon dioxide to prepare silicon dioxide. The silicon dioxide has the advantages of a low in specific surface area, a high oil absorption value, a high water absorption amount, the friction property and the like; toothpaste has good friction and cleaning performance after the silicon dioxide is used, and meanwhile, the problem of expansion of the viscosity of the toothpaste is well solved.

The invention provides a grease composition for frying; the grease composition contains a fully hydrogenated palm oil intermediate fraction. The invention also relates to a preparation method of the grease composition for frying and a method of improving the frying performance of frying oil; the methods include the step of mixing the fully hydrogenated palm oil intermediate fraction and the frying oil. The invention also includes a use of the fully hydrogenated palm oil intermediate fraction in preparation of the grease composition for frying or improvement of the frying performance of the frying oil. The grease composition for frying does not have a health problem of trans-fatty acids, the frying stability is markedly improved, the oil absorption rate of fried products is significantly reduced, and color, luster, brittleness, flavor and greasy feeling are all improved.

The invention provides modified wollastonite, and a preparation method and application thereof, belonging to the field of mineral material processing and application. The preparation method of the modified wollastonite provided by the invention comprises the following steps: mixing wollastonite with a titanate coupling agent, stearic acid and fatty acid polyoxyethylene ester, and carrying out a modification reaction to obtain inorganic modified wollastonite powder. According to the invention, a composite modifier composed of the titanate coupling agent, the stearic acid and the fatty acid polyoxyethylene ester is adopted for modification of the wollastonite, so the interface interaction between the wollastonite and a filling material can be improved, and the obtained modified product has improved binding capacity with PP and other materials and is improved in mechanical properties. Results of embodiments show that a PP composite material obtained by filling the PP with the modified wollastonite has a simply supported beam strength of more than 12.5 J, notch impact strength of no less than 7kJ/m<2>, tensile strength of more than 31 MPa, bending strength of more than 38 MPa, bendingmodulus of more than 1820 MPa and an oil absorption value of less than or equal to 23 mL/100 g.

The invention provides a preparation method modified calcium carbonate. The preparation method includes: mixing and crushing calcite and talcum, performing dry grinding to obtain raw slurry with solid content being 70-75%, performing constant-temperature stirring and grinding to obtain processed slurry with average particle size being 0.9-1.1 micrometers, adding naphthalene sulfonate type anti-precipitation agent and anionic surfactant into the processed slurry to perform liquid-phase dispersing, drying, collecting, depolymerizing and dispersing, adding brightener and liquid surface modifier to perform wrapping treatment, and stirring to obtain the modified calcium carbonate. By the preparation method, the modified calcium carbonate which is good in printing performance, good in dispersity, good in surface brightness and applicable to films adhered to car bodies can be prepared.

The invention belongs to the field of chemical industry and relates to a hydrolysis method for producing electronic-grade special titanium white by a sulfuric acid process. The technical problem to be solved is that the electronic-grade special titanium white with narrow particle size distribution and low impurity content is prepared by the sulfuric acid process. The method improves the hydrolysis method in the sulfuric acid process, and the improved hydrolysis method comprises the following steps of: A, adding titanium liquid with the concentration of 140 to 190g/L which is preheated to the temperature of between 75 and 95 DEG C into water which is preheated to the temperature of between 80 and 95 DEG C; B, heating the system to boil, and keeping the system boiling; C, when the hydrolysis system becomes steel grey, continuously keeping boiling for 5 to 25 minutes, stopping heating and stirring, and curing; and D, heating the system to boil with stirring, and keeping the system slightly boiling until the hydrolysis is finished. The obtained titanium white has the mean grain size of 800 to 1,200nm, the half-peak width of 70 to 98nm, narrow range of particle size distribution and low impurity content, and can be used as electronic-grade special titanium white.

The invention relates to a method for preparing smooth dense silver-coated copper powder through a chemical plating method. The preparing method comprises the following steps that deionized water anda dispersing agent are added into activated copper powder to obtain a copper nano-particle suspension liquid; a complexing agent is added into a silver nitrate water solution to prepare a silver complexing solution; and the above solutions are mixed, a reducing agent solution and a nano-silver suspension liquid are sequentially added, stirring is carried out at room temperature to obtain a silver-coated copper nanoparticle suspension liquid, and standing, washing and drying are carried out to obtain the smooth dense silver-coated copper powder. Compared with the prior art, nano-silver particles are added into a plating solution, so that the obtained silver-coated copper powder is dense in coating, smooth and non-porous in surface, excellent in conductivity and oxidation resistance, and extremely high in application value in the electronic slurry industry.

The invention relates totalcum powder and preparation method thereof, in particular to special scratch-resistant talcum powder for polypropylene and a preparation method thereof. The talcum powder comprises the following components in parts by weight: 0.1-0.5 part of titanate coupling agent, 0.1-0.5 part of silane coupling agent, 97-99 parts of superfine talcum powder and 0.1-0.5 part of high molecular weight siloxane copolymer. The invention has the following advantages and effects: the activation rate of the talcum powder provided by the invention is more than 99.0%, the oil adsorption value is less than 1.5mL/100g, the product purity is high and the particle size is 1-50mu m. Through the inspections of the professional inspection institution, the scratch resistance of the polypropylene car bumper special material prepared from the talcum powder which is provided the invention satisfies the grade A of the multi-finger scratch test and the Delta L in the Erichsen cross test is less than 1.5.