1199results about "Pigment treatment with organosilicon compounds" patented technology

Copper chromite particles can advantageously be used as black particles in electrophoretic media and displays. Preferably, the copper chromite particles are coated with a silica coating and a polymer coating.

The invention discloses a preparation method of a silica aerogel aqueous heat-insulating coating, and is characterized in that: prepared SiO2 microspheres are hydrophobic inside and hydrophilic outside; and the aerogel microspheres can be added into an aqueous coating carrier to prepare a good heat-insulating material. The main preparation method comprises the following steps of: before drying the prepared wet gel microspheres, performing surface modification by using an organic silane or an organic chlorosilane, so that the prepared wet gel microspheres are hydrophobic by grafting a large number of alkoxy groups or alkyl groups on the surfaces thereof, or directly preparing the hydrophobic wet gel microspheres; performing surface modification on the microspheres by using a hydrophilic silane coupling agent, and drying to obtain the SiO2 microspheres which are hydrophobic inside and hydrophilic outside; and adding the prepared microspheres into an aqueous coating for preparing the aqueous heat-insulating coating.

Silica coated carbon blacks are disclosed and can be prepared by coating a fine dispersion of carbon black, such as a carbon black having an attached organic group(s). Compositions and articles of manufacture, including elastomeric compositions, containing such carbon black are also disclosed.

The present invention is coated aluminum powder pigment and its preparation process. The coated aluminum powder pigment is prepared through the following steps: mixing aluminum powder pigment with alcohol solvent; adding organosiloxane, water and acid catalyst, and heating in water bath to react to obtain organosiloxane coated aluminum powder pigment; heating the reaction system to 65-120 deg.c, adding polymer monomer and initiator to react to obtain organosiloxane and polymer coated aluminum powder pigment; and cooling, filtering, washing and drying to obtain the coated aluminum powder pigment product. The coated aluminum powder pigment with two coating layers has excellent metal luster and high acid and alkali resistance, and is suitable for water paint.

A versatile silicone resin reflective substrate which exhibits high reflectance of high luminance light from an LED light source over a wide wavelength from short wavelengths of approximately 340-500 nm, which include wavelengths from 380-400 nm near lower limit of the visible region, to longer wavelength in the infra-red region. The silicone resin reflective substrate has a reflective layer which contains a white inorganic filler powder dispersed in a three-dimensional cross linked silicone resin, the inorganic filler powder having a high reflective index than the silicone resin. The reflective layer is formed on a support body as a film, a solid, or a sheet. The silicone resin reflective substrate can be easily formed as a wiring substrate, a packaging case or the like, and can be manufactured at low cost and a high rate of production.

A process of treating metal oxide nanoparticles that includes mixing metal oxide nanoparticles, a solvent, and a surface treatment agent that is preferably a silane or siloxane is described. The treated metal oxide nanoparticles are rendered hydrophobic by the surface treatment agent being surface attached thereto, and are preferably dispersed in a hydrophobic aromatic polymer binder of a charge transport layer of a photoreceptor, whereby π—π interactions can be formed between the organic moieties on the surface of the nanoparticles and the aromatic components of the binder polymer to achieve a stable dispersion of the nanoparticles in the polymer that is substantially free of large sized agglomerations.

Free flowing filler composition based on organofunctional silane and/or mixtures of organofunctional silanes possessing mercaptan and blocked mercaptan functionality. The invention also relates to articles of manufacture, particularly tires, made from the elastomer compositions described herein.

The invention discloses a method for chemically modifying inorganic filler with graphene oxide and a product. The method comprises the following steps: performing surface hydroxylation treatment and silane coupling agent treatment on the inorganic filler; maintaining the pH of a graphene oxide solution at 5.8-6.0 with an MES buffer solution; sequentially adding EDC and NHS, and performing ultrasonic treatment for 1-3 hours; adding the treated inorganic filler, and performing an amidation reaction at room temperature; and after the reaction, filtering, washing and drying to obtain the graphene oxide modified inorganic filler. The invention also discloses a method for preparing an inorganic filler/epoxy resin composite by use of the product. The process flow of the method disclosed by the invention is simple and environmentally friendly; the GO is connected to the surface of the inorganic filler by a chemical modification process, and the firm covalent bond combination between the GO and inorganic particles is generated, so that the interface adhesiveness and mechanical strength between the inorganic filler and the polymer are enhanced, and a new idea is provided to the modification of an inorganic filler surface and the preparation of a high-performance composite.

An inorganic oxide dispersion containing an organic solvent, and inorganic oxide particles surface-treated with at least one of a hydrolyzate and a partial condensate of an organosilane compound represented by formula (I), the inorganic oxide particles being dispersed in the organic solvent: (R¹⁰)_m—Si(X)_4−m (I) as defined herein, the surface treatment of the inorganic oxide particles being carried out in a presence of at least one of: (a) an acid catalyst; and (b) a metal chelate compound having Zr, Ti or Al as a center metal and at least one of an alcohol represented by formula: R³OH in which R³ represents an allyl group having 1 to 10 carbon atoms, and a compound represented by formula: R⁴COCH₂COR⁵ as defined herein, as a ligand.

The invention discloses a preparation method of a double-layer coated water-based aluminum pigment, which comprises the following steps: coating ethyl orthosilicate on lamellar aluminum powder to form a single-layer coated aluminum pigment; and under the action of an azo initiator, coating a hydrophilic ester monomer on the single-layer coated aluminum pigment to form the double-layer coated water-based aluminum pigment. The double-layer coated water-based aluminum pigment prepared by the method provided by the invention has the advantages of high coating tightness and favorable water resistance, and the coating layer can not be easily damaged. The organic layer on the outer layer is easily compatible with high-molecular rein in the paint, has favorable dispersity in the paint, and is mainly used in various water-based paints and water-based inks.

The present invention is related to treated filler and processes for producing said treated filler. Untreated filler slurry can be treated with a treating material and, optionally, a coupling material and then subjected to conventional drying method(s), to produce the treated filler of the invention. Treated filler has a wide variety of applications including but not limited to battery separators and rubber compositions such as tires.

Methods comprising: providing a treatment fluid that comprises a base fluid and a least a plurality of coated particulates, the coated particulates having been treated with a surface modification agent and coated with a hydrolysable coating; placing the treatment fluid into a subterranean formation via a well bore. Also provided are methods comprising: treating a particulate with a surface modification agent; coating the particulate with a hydrolysable coating that has an initial degradation rate to produce a coated particulate; placing the particulate in a subterranean formation; and allowing the hydrolysable coating to degrade at a second degradation rate that is slower than its initial degradation rate.

The present invention provides process of organizing the surface to modify inorganic powder, and during the process, inorganic superfine particles are dispersed homogeneously in non-polar organic solvent and have the surfaces well organization modified. The process includes preparing water solution for dispersing inorganic powder, dissolving organic surface modifier, organic surface modifying, solid-liquid separating and washing, and post-treatment. The process features that oil-water interface and phase transfer are utilized for organic surface modification of inorganic superfine powder in non-polar organic solvent.

Silane-modified oxidic or siliceous filler with a bead fraction below 75 mum of less than 15 wt. % and a median particle size distribution between of 150 to 500 mum, which is produced by the reaction of at least one microbeaded or microgranular, oxidic or siliceous filler in a compressed gas with at least one silane. The silane-modified oxidic or siliceous fillers are used in rubber compounds.

The invention discloses novel nano calcium carbonate used for a plastic film and a preparation method thereof. A Ca(OH)2 suspension and CO2 are carbonized in a reactor to generate the nano calcium carbonate, and then the obtained nano calcium carbonate is subjected to liquid phase coating treatment or is directly subjected to mixed coating by using dried nano calcium carbonate and a surfactant to obtain nano calcium carbonate powder which is highly dispersed and surface-activated. The invention has the advantages that: the process is simple, the nano calcium carbonate is effectively dispersed in a polymer and a remarkable enhancement effect can be achieved on the premise of ensuring the transparency. The nano calcium carbonate prepared by adopting the invention can remarkably improve the mechanical property of a polyolefin material; after the nano calcium carbonate is used for polyethylene plastic, the tension strength of the material is greatly improved; and after the nano calcium carbonate is used for a polyolefin film, a fish eye is free, and the high transparency of the film is maintained.

The invention relates to surface-modified nanoparticles composed of metal or semimetal oxides or hydroxides and having been reacted on their surface with a modifier, with formation of covalent bonds. The modifier is a polysiloxane. The invention also relates to a process for preparing the nanoparticles, to their use as fillers in coating materials, plastics, foams and nail varnishes, and to dispersions which comprise the nanoparticles.

The invention relates to a surface-modified nano silicon dioxide and a preparation method thereof, particularly a method for preparing lipophilic nano silicon dioxide by in-situ modification by a sol-gel process, belonging to the field of functional nano materials. The invention adopts a sol-gel process to prepare the nano silicon dioxide under the common catalytic action of acid and alkali, and performs in-situ modification on the nano silicon dioxide by using a silane coupling agent, so that the nano silicon dioxide becomes lipophilic instead of hydrophilic. The wetting property and dispersity of the modified nano silicon dioxide in the polymer are improved.

The invention relates to a method for preparing a nanocomposite and particularly relates to a method for modifying a halloysite nanotube with a silane coupling agent and an epoxy resin nanocomposite prepared by mixing the modified halloysite nanotube obtained by the method and epoxy resin. The surface modification treatment method of the halloysite nanotube, which is disclosed by the invention comprises the following steps of adding the silane coupling agent into a suspension containing the acidified halloysite nanotube and carrying out condensation reaction on a hydrolyzable X group on the silane coupling agent and a hydroxy group on the lamella on the surface of the halloysite nanotube to obtain the halloysite nanotube which is modified by the silane coupling agent and of which an inner cavity and the outer surface are grafted by the silane coupling agent, and mixing the modified halloysite nanotube and epoxy resin to prepare the epoxy resin nanocomposite. The epoxy resin nanocomposite can obtain the desired mechanical properties and thermal properties.

The invention relates to a modification method of the organic surface of attapulgite. The process steps are as follows: the attapulgite powder is added into deionized water according to certain proportion, so as to produce attapulgite suspendion liquid, and the attapulgite mass occupies 5 percent to 25 percent of the water mass; the temperature of the attapulgite suspendion liquid is adjusted to be 20 to 90 DEG C, cationic surface active agent is added, the cationic surface active agent quality is 2 to 10 percent of the attapulgite quality, and stirring and reaction are perfromed for 2 to 10 h; after the organic surface modification of the cationic surface active agent is accomplished, the pH value of the system is adjusted to be 3 to 3 or 8 to 11, silane coupling agent is added into the reaction system, the silane coupling agent mass occupies 5 to 20 percent of the attapulgite mass, and the the silane coupling agent is stirred and reacted for 3 to 24 h below 20 to 90 DEG C; the obtained attapulgite pulp is filtered, washed, dried and crushed, and finally the attapulgite powder modified through combing the cationic surface active agent with the silane coupling agent is obtained. Through the cationic surface active agent and the silane coupling agent to perform the organic surface modification to the attapulgite together, the organic surface modification effect is greatly improved.

The invention discloses a preparation method of an efficient and environment-friendly composite fire retardant, which comprises the following steps: modifying attapulgite to obtain nano attapulgite; and using the nano attapulgite as a substrate, coating a proper amount of inorganic fire retardant and phosphate fire retardant on the surface so as to form the efficient and environment-friendly composite fire retardant. By using the preparation method, the obtained fire retardant can be superfine, and the influence of the fire retardant on the processability and the physical properties of the high molecular substrate material can be weakened. At the same time, by the fire retardant property of the nano attapulgite and the synergetic effect of multiple fire retardants, the fire retardant efficiency is enhanced, the industrial cost of the fire retardant is lowered and a new way is provided for the development and the application of attapulgite.

The invention discloses a method for preparing titanium dioxide for coating surfaces of hollow glass microspheres. The method comprises: washing the hollow glass microspheres with alkali liquor to remove impurities and etching to improve activity; performing surface activation and modification by using a silane coupling agent; mixing the activated hollow glass microspheres and distilled water in a mass ratio of 1:10; fully stirring at 40 to 90 DEG C; in the stirring process, dripping solution of titanium sulfate at a constant speed with in 2 to 6 hours according to a mass ratio of the hollow glass microspheres to the titanium sulfate of 1:0.8-1:1.6; slowly adding alkali liquor, keeping the pH value of the reaction system between 5 and 7, and stirring first at a speed of 400r/min for the first 1/5 of reaction time and then at a speed of 100 to 300r/min for the rest 4/5 of reaction time; and after the reaction is finished, standing, performing suction filtration, washing with distilled water, drying and calcining. The hollow glass microspheres coated with the titanium dioxide can serve as filler for reflective and thermal-insulation coating. Compared with common hollow glass microspheres, the hollow glass microspheres can be used for preparing and synthesizing high-performance coating combining various thermal-insulation mechanisms.

The invention provides an organic-silicon pouring sealant composition with high thermal conductivity and an application thereof. The composition comprises a component A and a component B, wherein the component A comprises 100 parts of vinyl silicone oil, 6-14 parts of hydrogen silicone oil, 400-1000 parts of organic-silicon coated alumina powder and 0.1-0.8 part of inhibitor; and the component B comprises 100 parts of vinyl silicone oil, 400-1000 parts of organic-silicon coated alumina powder and 0.2-1.5 parts of catalyst. The composition can still achieve high alumina addition volume under the premise of ensuring low viscosity of the organic-silicon pouring sealant, thus improving the thermal conductivity of the pouring sealant.

A combination for surface treating powder, composed of (I)organopolysiloxane or condensate thereof and (II)organopolysiloxane in a weight ratio of (I):(II) of from 95:5 to 5:95; (I)organopolysiloxane or condensate thereof and (III) acryl/silicone copolymer in a weight ratio of (I):(III) of from 95:5 to 5:95; or (I)organopolysiloxane or condensate thereof, (II)organopolysiloxane and (III) acryl/silicone copolymer in a weight ratio of (I):[(II)+(III)] of from 95:5 to 5:95, provided that each of (I), (II), and (III) may be packed together or separately, wherein (I)organopolysiloxane is represented by the following formula (1),

R¹_a(OR²)_bSiO_(4-a-b)/2  (1)

wherein R¹ may be the same with or different from each other and is a C_1-30 alkyl, aryl, aralkyl, fluorinated alkyl or amino-substituted alkyl group,

• R² is a C_1-6 alkyl group, a is the number of from 0.75 to 1.5, and b is the number of from 0.2 to 3, provided that a sum of a and b is greater than 0.9 and at most 4; (II)organopolysiloxane is represented by the formula (2)

R³_cR⁴_dR⁵_eSiO_(4-c-d-e)/2  (2)

wherein R³may be the same with or different from each other and is a C_1-30 alkyl, aryl, aralkyl, or fluorinated alkyl group,

R⁴ is a hydrogen atom, a hydroxyl group or a C_1-6 alkoxy group and is bonded to the Si atom in the formula (2) via a group comprising carbon, oxygen, or silicon atom, and

R⁵ is a silicone compound residue represented by the following formula

wherein R3 is as defined above, c is the number of from 1.0 to 2.5, d is the number of from 0.001 to 1.5, and e is the number of from 0 to 1.5, x is an integer of from 1 to 5, and y is an integer of from 0 to 500; and (III) acryl/silicone copolymer has at least one hydrolyzable silyl group.

The invention provides a nano-modified highly stain-resistant elastic paint and a preparation method thereof, belonging to the technical field of building paint preparation. The composition and mass percent of the elastic coating provided by the present invention are: emulsion 40-50; water-based nano-colloidal silicon; 2-5; ultrafine aluminum carbonate; 15-25; modified nano-calcium carbonate 5-10; rutile titanium White powder; 8~15; pH regulator; 0.30~35; film-forming aid 0.50~0.65; elastic defoamer; 0.35~0.40; wetting agent 0.20~0.30; ; Leveling agent; 0.30~0.45; Bactericidal preservative; 0.10~0.15; Thickener; 0.10~0.20; Water; Balance. The nano-modified highly stain-resistant elastic paint provided by the present invention well achieves a balance among elasticity, stain resistance, water resistance, adhesion and practicability.

The invention relates to a high-performance natural rubber vulcanized rubber of a carbon-containing nano-tube, which is prepared by a method comprising the steps of: plasticating the carbon-containing nano-tube with a modified surface and natural rubber together to prepare master batch; adding crude rubber, carbon black, zinc oxide, vulcanized agent and accelerating agent into the master batch, processing the obtained mixture by an open mill or an internal mixer, and obtaining natural rubber mixer modified by the carbon-containing nano-tube; and carrying out vulcanizing processing, and obtaining the modified natural rubber vulcanized rubber. By adding the modified carbon-containing nano-tube into the natural rubber material, the invention leads the comprehensive performances such as wear-resisting property, mechanism strength, anti-aging performance, heat-conducting property, anti-fatigue performance and the like of the natural rubber to be remarkably improved, thus improving the using performance of the natural rubber vulcanized rubber, reducing the using quantity of carbon black, and expanding the application scope of the natural rubber vulcanized rubber.

The invention relates to graphene-containing lubricating oil, which contains lubricating grease and multiple modified graphene powder. The modified graphene powder accounts for 0.001wt%-10wt%, is evenly dispersed in the lubricating grease, and the modified graphene powder includes at least one surface modification layer. The at least one surface modification layer includes a surface modifier, and at least two functional groups respectively located at two ends of the surface modifier. One functional group of the at least two functional groups undergoes chemical bonding with the organic functional group on the graphene powder surface, and the other functional group of the at least two functional groups forms the surface properties of the modified graphene powder. And the surface modification layer can provide the modified graphene powder and lubricating oil with good affinity.

The invention discloses a method for preparing active calcium carbonate, which comprises the following steps of: adding 1 to 10 weight parts of one or a mixture of more of fatty acid and fatty acid salt and 0.05 to 5 weight parts of coupling agent into suspension containing 100 weight parts of calcium carbonate, and modifying at the temperature of between 60 and 90 DEG C for 0.5 to 5 hours to prepare the active calcium carbonate. The method has a simple preparation process and is stable in performance; and the surface of the prepared active calcium carbonate has the good hydrophobicity, is easy to disperse in rubber and resin, improves the combination property of polymers, and can be used in fields of the rubber, adhesives and the like.

The invention discloses a thermal-insulation coating by taking hydrophobic silicon dioxide aerogel microspheres as thermal-insulation packing. The coating is prepared by the following main steps: preparing the hydrophobic silicon dioxide aerogel microspheres; and mixing the prepared hydrophobic silicon dioxide aerogel microspheres and a polymer emulsion to prepare the thermal-insulation coating. Hydrophobic modification of the silicon dioxide aerogel microspheres includes the following two modes: in one mode, silicon dioxide wet-gel microspheres are modified by adopting halogenated hydrocarbon and in the other mode, alkoxy silane, silazane or siloxane is added into a mixed solution in a sol preparing stage. When the coating is prepared, a surfactant is added, so that the compatibility between the hydrophobic silicon dioxide aerogel microspheres and the polymer emulsion can be improved, the dispersibility of the microspheres in the coating can be improved, the coating quality can be improved, and the thermal-insulation performance of the coating can be improved.

The invention relates to a high performance super-amphiphobic conductive multi-functional corrosion-resistant coating, which is characterized by comprising a bottom layer component and a surface layer component, wherein the bottom layer component is epoxy resins, epoxy curing agents, organic fluorines, polyaniline/carbon nanofibers composite materials, the surface layer component is organic fluorines, low surface energy modified nanofillers and fluorine silane coupling agents. The high performance super-amphiphobic conductive multi-functional corrosion-resistant coating can have the advantages of superamphiphobic, drag reduction, abrasion resistance and pit corrosion resistance, and is low in cost. The invention further provides a method for preparing the high performance super-amphiphobic conductive multi-functional corrosion-resistant coating.

The invention relates to a surface treatment method for a powder composition of optical diffusion plastic, which is characterized by comprising the following steps: modifying the surfaces of inorganic optical diffusion particles with a silane coupling agent in an in-situ polymerization method, ultrasonically dispersing the inorganic optical diffusion particles into an organic solvent, and slowly dripping mixed solution of an initiator and (methyl) acrylic acid and ester monomers thereof at a certain temperature for polymerization, thereby obtaining the product. Since the compound with the core-shell structure is prepared through in-situ realization and combination of the inorganic particles, the invention not only improves the compatibility of the powder composition and the transparent plastic substrate, but also has no large changes in optical properties. Moreover, the refractive index matching degree of the powder composition and the transparent plastic substrate can be effectively adjusted through changing the thickness of the shell layer and the core layer of the powder composition, thereby realizing high transparency and optical diffusibility.