470 results about "Silanol" patented technology

The invention relates to a preparation method of a universal super-hydrophobic fluoride-free waterproof agent with strong washability. According to the method, a polymeric monomer and a polymerizable silane coupling agent are subjected to free radical copolymerization or polycondensation to obtain an emulsion A, and a silanol-based compound formed by hydrolysis of the silane coupling agent interacts with the surface of a fiber base material to enhance the adhesive force of microspheres on the fiber surface; meanwhile, organic silicon in the emulsion B is cured on the surfaces of the polymer microspheres and the fibers to form a film, so that the firmness of the fabric is further enhanced, and the washability of the fabric is remarkably improved while an excellent hydrophobic effect is ensured. According to the invention, simplification and batch production of the production process are effectively realized, and meanwhile, the requirements of modern industry on economic and green production are met.

The invention relates to a preparation method of composite porous carbon beneficial to silicon deposition and a silicon-carbon composite negative electrode. The method comprises the following steps: (P1) carrying out surface oxidation treatment on porous carbon fine powder to obtain oxidized porous carbon fine powder; (P2) adding the oxidized porous carbon fine powder and ether polycarboxylic acid silanol into a solvent to obtain ether polycarboxylic acid silanol modified porous carbon fine powder; the ether polycarboxylic acid silanol is prepared by copolymerizing a polyether macromonomer, an acrylic monomer and an alkenyl silane coupling agent in water; (P3) soaking the ether polycarboxylic acid silanol modified porous carbon fine powder in a salt aqueous solution to obtain catalyst-loaded porous carbon; (P4) mixing the porous carbon loaded with the catalyst with a carbon source precursor solution, and performing spray drying to obtain a composite carbon precursor; and (P5) carbonizing and activating the composite carbon precursor to obtain the composite porous carbon beneficial to silicon deposition. The composite porous carbon prepared by the invention is beneficial to more uniform deposition of silicon in pores of the core porous carbon fine powder.

A carbon-coated current collector. The carbon-coated current collector comprises a foil and a conductive coating arranged on the surface of the foil. The conductive coating comprises a combination of a modified conductive carbon material and a binder. The binder is prepared from the following raw materials in parts by weight: 40-60 parts of methyl isobutyl ketone, 25-30 parts of a solvent, 20-25 parts of isobornyl methacrylate, 20-25 parts of methyl methacrylate, 20-25 parts of n-butyl acrylate, 20-25 parts of hydroxyethyl acrylate, 18-22 parts of silicone oil, and 50-55 parts of an initiator. The modified conductive carbon material is a fluorosilane-modified carbon material. The modified conductive carbon material and the binder can form silanols by means of hydrolysis reaction of respective alkoxy groups, then the silanols form new hydrogen bonds with OH groups, and covalent bonds are formed on the surface of the carbon material, thereby forming a highly cross-linked network structure, which further enhances water resistance, allowing for the ability to withstand 200 or more wiping operations.

The invention discloses a silane cross-linked polyolefin halogen-free flame-retardant cable material and a low-energy-consumption preparation method thereof.The preparation method comprises the steps that EVA / EEA serves as a matrix, silane groups are covalently connected to a polyolefin molecular chain through a free radical grafting reaction, and a grafting material containing an active silane side group is prepared; meanwhile, vinyl isocyanate is adopted to chemically modify hydroxyl on the surface of magnesium hydroxide, vinyl is grafted to the surfaces of particles, the polarity of the particles is reduced, and the dispersity of the particles is enhanced; then carrying out melt blending on the grafted material and modified magnesium hydroxide, constructing an interface bridge by using an anhydride group, and shortening the two-phase distance; finally, through room-temperature natural cross-linking and warm water auxiliary cross-linking, silane groups are promoted to be hydrolyzed into silanol, the silanol is condensed to form a-Si-O-Si-three-dimensional network, meanwhile, vinyl on the surface of magnesium hydroxide and a polyolefin matrix are subjected to free radical copolymerization, and a covalent bond interface layer is formed between inorganic particles and an organic matrix. According to the method, the synergistic improvement of high crosslinking degree, strong stretchability and excellent flame retardance of the cable material is realized through molecular-level interface regulation and cross-linking network optimization.

The invention discloses a method for melt catalysis modification of a bamboo powder / polypropylene composite material and application, and the preparation method of the composite material comprises the following steps: uniformly spraying a composite silane coupling agent water-alcohol solution on the surface of bamboo powder, and drying to obtain modified bamboo powder; polypropylene, silicone master batches (containing 50% of polydimethylsiloxane), the modified bamboo powder and a cobalt acetylacetonate / manganese acetylacetonate catalyst are uniformly mixed in different temperature zones, melt extrusion is performed, and the modified bamboo powder / polydimethylsiloxane / polypropylene composite material is prepared. The alkoxy group of the composite silane coupling agent is hydrolyzed to form silanol, the silanol reacts with the hydroxyl group on the surface of the bamboo powder to form a hydrogen bond, the hydrogen bond is condensed into a covalent bond, meanwhile, the amino group and the imino group in the coupling agent can also form a hydrogen bond with the hydroxyl group, and hydrophobic modification is conducted on the bamboo powder. Polydimethylsiloxane in the silicone master batch and silicon hydroxyl on the surface of the modified bamboo powder are subjected to a dehydrogenation reaction through fusion catalysis, stable chemical bonds are generated, an interface layer is formed, and the effect of enhancing the compatibility between the bamboo powder and polypropylene is achieved.

The invention relates to the technical field of pigments, and particularly discloses a water-based colored aluminum-based pigment and a preparation method thereof. The water-based colored aluminum-based pigment comprises aluminum powder, the surface of the aluminum powder is coated with a silicon dioxide layer, and the surface of the silicon dioxide layer is grafted with amino silanol; the preparation method comprises the following steps: stirring and mixing aluminum powder and absolute ethyl alcohol to obtain an aluminum powder dispersed phase; adding the aluminum powder dispersed phase into the silica sol, then adding ammonia water, and stirring for reaction to obtain aluminum powder coated with a silicon dioxide layer; and adding amino silanol into the aluminum powder coated with the silicon dioxide layer, and carrying out condensation reaction to obtain the water-based colored aluminum-based pigment. According to the water-based colored aluminum-based pigment, the silicon dioxide layer is adopted to reduce corrosion of water to the aluminum powder, the amino silanol and the anionic dye are adopted to generate electrostatic interaction force, and different anionic dyes can be compounded, so that the obtained water-based colored aluminum-based pigment has the advantages of being rich in color, high in stability and good in dispersity in a water-based system.

Provided herein is a method of sequentially isolating DNA and RNA from a sample, the method comprising: contacting the sample with a solid support comprising surface silanol groups in the presence of an aqueous nucleic acid purification buffer to provide a DNA-bound solid support; removing the DNA-bound solid support from the sample; contacting the sample with a solid support comprising surface carboxyl groups in the presence of the aqueous nucleic acid purification buffer to provide an RNA-bound solid support; and removing the RNA-bound solid support from the fluid sample, wherein the aqueous nucleic acid purification buffer comprises a polar aprotic solvent. Also provided is a kit comprising said purification buffer and solid supports, the use of said kit in an automated nucleic acid analysis platform, and a nucleic acid analysis apparatus, comprising an automated nucleic acid analysis platform; and the aforementioned kit.

The invention discloses a phosphate ester type composite binder for a sulfide battery, the phosphate ester type composite binder comprises a solute and a solvent, the solute comprises the following components in percentage by mass: 49.75%-88.5% of a binder, 9.5%-49.75% of phosphate ester and 0.45%-1.96% of silanol; the solvent is a non-polar solvent, and the mass ratio of the solute to the solvent is 1%: (10%-90%); the preparation method comprises the following steps: S1, placing the binder in a non-polar solvent, and heating and stirring until the binder is completely dissolved to obtain a solution A; s2, mixing a silane coupling agent with absolute ethyl alcohol, adjusting the pH value with acetic acid, and stirring to generate silanol; s3, silanol is added into the solution A, so that one end of silanol reacts with active hydrogen of the binder for bonding; and S4, adding phosphate into the solution A, so that the other end of the silanol is combined with a group of the phosphate to obtain a reaction solution with a binder-silanol-phosphate structure. According to the invention, stable combination of the binder and phosphate is realized through a silanol-mediated grafting structure, and the interface stability, the ionic conductivity and the mechanical strength are improved.

The invention discloses an in-situ inorganic hybridization reinforced polyurethane resin and a preparation method thereof. An inorganic in-situ bonding structure of the in-situ inorganic hybridization reinforced polyurethane resin can effectively control the strength and hardness of the polyurethane resin; and the organic auxiliary agent can effectively reduce the curing speed of the high-activity component, so that the system resin can be simultaneously applied to use scenes with different curing speeds and different hardness requirements. The in-situ inorganic hybridization reinforced polyurethane resin comprises a component A and a component B. The component A is prepared from the following components in parts by mass: 100 parts of isocyanate-terminated polyurethane oligomer, 4.5 to 102 parts of monomer polyisocyanate b, 2.9 to 4.4 parts of reaction speed regulator and 0 to 1.2 parts of catalyst a; the component B is prepared from the following components in parts by mass: 14.5 to 89.6 parts of silanol, 0 to 2 parts of glycerol and 0 to 1.2 parts of catalyst b; wherein in use, the component A and the component B are mixed according to the mass ratio of (1.66-7.1): 1 to obtain the in-situ inorganic hybridization reinforced polyurethane resin.

The invention relates to a nanocellulose-silicon-based hybrid material, preparation and application thereof and a thermoplastic polymer composite material. Comprising the following steps: combining nano SiO2 containing hydrophilic hydroxyl on the surface with hydroxyl on the surface of cellulose, then adding a silane coupling agent, reacting and hydrolyzing the silane coupling agent to obtain silanol, combining the silanol with hydroxyl on the surface of nano SiO2 particles and hydroxyl on the surface of nano cellulose, drying, dehydrating the silanol into siloxane, and grafting the siloxane on the surface of nano cellulose / SiO2, thereby obtaining the nano SiO2 / silanol composite material. Grinding to obtain a nanocellulose-silicon-based hybrid material, blending the obtained hybrid material with a thermoplastic polymer matrix, and preparing a corresponding product through a thermal forming process. The process is environment-friendly, the method is simple, the product is easy to form, operation and control are simple and convenient, and industrial production is facilitated; the prepared hybrid material has good stability, dispersibility and polymer matrix compatibility, and shows excellent mechanical properties and thermal properties when applied to thermoplastic polymers.

The invention discloses a modified polyferric coagulant and a preparation method thereof, and belongs to the technical field of papermaking wastewater treatment.The polyferric sulfate serves as a main chain and then is combined with carboxylated polyvinyl alcohol, the carboxylated polyvinyl alcohol contains a large number of carboxyl groups, and the carboxylated polyvinyl alcohol and iron ions in polyferric molecules can form stable complexing coordination bonds; kH-570 can generate a polyhydroxy complex after hydrolysis, and active silanol on the surface of the hydrolysis product serves as a carrier with a larger surface area, can be combined with polyferric sulfate and can be subjected to a condensation reaction with hydroxyl and amino on chitosan, so that the molecular weight of the polymer is increased. Compared with a conventional coagulant, the prepared modified polyferric coagulant has the advantages that the selective adsorption performance is increased, the characteristic that PFS carries a large number of positive charges is reserved, meanwhile, molecular chains are increased, the speed of net capturing, sweeping and floc forming is increased, and the coagulation effect is higher.

The invention relates to the technical field of high-molecular compound preparation, in particular to a high-molecular compound preparation method and system.The method comprises the steps that distilled water and boron nitride are added into a container containing silane monomers, stirring reaction is conducted for 3-5 h, and a hyperspectral image of a mixed solution in the container in the stirring reaction process is collected; the method comprises the following steps: acquiring spectral similarity factors of matched pixels in a hyperspectral image, judging the fullness degree of a stirring reaction according to the distribution characteristics of the spectral similarity factors of the pixels, completing the stirring reaction, mixing the prepared boron nitride modified organic silicon resin, silanol, polyester resin and a crosslinking catalyst, continuously reacting for 2-4 hours at 110-130 DEG C, adding an organic solvent, and uniformly stirring to obtain the boron nitride modified organic silicon resin. The solid content of the modified polyester resin is 62-66%. The invention aims to improve the performance and prolong the service life of the prepared modified polyester resin, and realizes the preparation method of the high-molecular compound.

The invention discloses vinyl fluorine-containing polysiloxane and a preparation method thereof, and relates to the technical field of organic silicon materials. According to the invention, high-activity fluorine-containing potassium hydroxide silanolate is used as a catalyst to realize high-efficiency catalysis; d3F serves as a main monomer, D3Vi serves as a comonomer, deionized water is introduced for the first time to serve as a retarder, and implosion is effectively inhibited; vinyl dimethyl ethyoxyl silane is used as an end-capping reagent for the first time, end group vinylation is synchronously realized, and end group and side chain divinyl polysiloxane is prepared; through cooperation of ring-opening polymerization and condensation polymerization, the reaction process is mild and controllable, the product viscosity is controllable, the crosslinking activity is high, and the application range is remarkably widened.

Methods and compositions including a CO2 foam treatment fluid having a plurality of functionalized silanol group silica nanoparticles the silanol group selected from the group consisting of an isolated silanol group, a vicinal silanol group, a geminaol silanol group, and any combination thereof; and a surfactant. The CO2 foam treatment fluids can be used for stimulation of subterranean formations for hydrocarbon production.

A fine particle of a silicon polymer having a siloxane group and a silanol group, wherein a moisture adsorption amount of the fine particle at a temperature of 30° C. and a humidity of 80% RH is from 1.0 mg / g to 22.0 mg / g, an amount of the silanol group of the fine particle measured by a titration method using KOH is from 0.012 mmol / g to 0.120 mmol / g, and a number average particle diameter of primary particle of the fine particle is from 0.05 μm to 0.30 μm.

The invention discloses a solid electrolyte membrane for constructing a grain boundary bridge based on an APTES coupling agent and a preparation method of the solid electrolyte membrane, and belongs to the technical field of lithium batteries. According to the composite film, a gallium-doped lithium ion conductor is used as an inorganic phase, a polymer is used as an organic phase, APTES is added for ball milling, an APTES siloxane group is hydrolyzed to generate silanol, the silanol and hydroxyl on the surface of inorganic filler LGLZO are subjected to condensation, terminal amino and the polymer form a hydrogen bond, and a grain boundary bridge is successfully constructed. By adding the APTES coupling agent, the organic-inorganic interface compatibility can be enhanced, the growth of lithium dendrites can be inhibited, the interface impedance can be reduced, the interface stability and the lithium ion transmission efficiency can be improved, and the structural integrity and the electrochemical performance of the battery in the cycle process can be guaranteed; and important theoretical guidance and experimental basis are provided for structural design and performance optimization of the composite solid electrolyte membrane.

To provide a surface treatment agent composition comprising a silicone-based compound and capable of achieving both durable water repellency and resistance to peeling, and to provide a water / oil-repellent fiber product and a method for producing the same.SOLUTION: A surface treatment agent composition comprises: a silicone resin (A); and an organopolysiloxane (B) containing silanol groups, wherein the silicone resin (A) includes, as a component, at least one selected from MQ, MDQ, MTQ, and MDTQ {M, D, T, and Q respectively represent (R'')3SiO0.5 units, (R'')2SiO units, R''SiO1.5 units and SiO2 units, and R'' represents a monovalent aliphatic hydrocarbon group having 1 to 10 carbon atoms or a monovalent aromatic hydrocarbon group having 6 to 15 carbon atoms}.SELECTED DRAWING: None

The invention belongs to the field of catalyst preparation, and particularly relates to a platinum-based bimetallic propane dehydrogenation catalyst and a preparation method thereof. The method comprises the following steps: firstly, weighing beta molecular sieve powder, adding into a concentrated nitric acid solution, stirring and refluxing at high temperature, centrifugally washing, and drying to obtain a dealuminated beta molecular sieve; then calcining the metal additive oxide powder and the dealuminated beta molecular sieve in a reducing atmosphere to obtain composite beta molecular sieve powder; then weighing platinum precursor salt, dissolving the platinum precursor salt in ultrapure water to form a solution, and then adding ethylenediamine for coordination; and finally, impregnating the composite beta molecular sieve with a platinum precursor solution, and carrying out aging, drying and high-temperature treatment to obtain the dealumination beta molecular sieve loaded platinum-based bimetallic catalyst. According to the method provided by the invention, the metal is spontaneously and highly dispersed on the carrier by utilizing the capturing effect of the beta molecular sieve silanol nest on the metal and combining the dynamic migration behavior of the metal under high-temperature reduction. The prepared catalyst shows extremely high propane conversion activity and selectivity at 600 DEG C, and is excellent in stability.

A method of inhibiting silica-containing scales in an industrial process comprising contacting a process slurry with a scale inhibitor, the process slurry having a solids concentration of at least 0.5 g / L, wherein the scale inhibitor comprises a compound comprising recurring units covalently bound to at least one pendant silanol group.

The invention discloses an Ectoin and hydrolyzed collagen silanol composition as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing a hydrolyzed collagen silanol derivative: hydrolyzing a silane coupling agent in an acidic organic solvent aqueous solution to obtain silanol hydrolysate; the preparation method comprises the following steps: dissolving hydrolyzed collagen in deionized water, adjusting the pH value to 8-10, stirring, adding silanol hydrolysate for reaction, cooling to room temperature, and freeze-drying to obtain hydrolyzed collagen silanol derivative powder; the preparation method comprises the following steps: preparing an Ectoine and hydrolyzed collagen silanol composition: dissolving hydrolyzed collagen silanol derivative powder and Ectoine in pure water together, and carrying out ultrasonic treatment to obtain the Ectoine and hydrolyzed collagen silanol composition, the prepared composition can inhibit skin heat injury, inhibit skin inflammatory response, promote skin collagen regeneration and repair skin barrier, and can be applied as a raw material of skin care products or medical beauty products.

The invention discloses an anti-aging composition and application thereof. According to the anti-aging composition disclosed by the invention, the anti-aging composition is prepared by compounding dimethyl silanol hyaluronate, radix pseudostellariae cyclic peptide B and a medicago sativa extract. The medicago sativa extract disclosed by the invention is obtained by adopting a pulsed ultrasound-assisted subcritical extraction technology, and can play a better anti-aging effect. Experiments verify that the composition can significantly increase the content of retinoic acid binding receptor RAR alpha and RXR gamma proteins and type I collagen, inhibit cell aging and achieve an anti-aging effect similar to that of retinol, but compared with retinol, the composition is mild and non-irritant, can significantly improve the preservative efficacy of a product when being used in skin care products, and can reduce the dosage of preservatives.

The present invention provides a degradable crosslinking agent that has high solubility in a solvent and is not susceptible to poor curing. The present invention is a crosslinking agent comprising a compound represented by formula (1) (In formula (1): n ≥ 0, k ≥ 0, and m ≥ 0; R1, R2, and R3 independently include, at a terminal end, one or more reactive functional groups selected from the group consisting of a hydroxyl group, an amino group, a hydrazide group, a thiol group, an isoprenyl group, a crotonamide group, a crotonate group, a carboxylic acid, an acid anhydride group, a vinyl group, an allyl group, an acrylate group, a methacrylate group, an acrylamide group, a methacrylamide group, a hydroxysilyl group, an epoxy group, an oxetane group, an oxazoline group, an isocyanate group, a carbodiimide group, a methylol group, a silanol group, and an alkoxysilyl group, and includes a single bond, a group including a siloxane structure, or a hydrocarbon group which may have a substituent or a hetero atom; A1 to A8 are independently a carbonyl group or a single bond, and at least one of A1 and A2 is a carbonyl group, at least one of A3 and A4 is a carbonyl group, at least one of A5 and A6 is a carbonyl group, and at least one of A7 and A8 is a carbonyl group; and each Z is independently a group containing a siloxane structure or a hydrocarbon group which may have a hetero atom.) (a) When n = 0, R1 and R2 are different; (b) when n ≥ 1 and k = 0, (b-1) R1 and R2 are different, and / or (b-2) at least one Z having an asymmetric structure is included; and (c) when n ≥ 1 and k ≥ 1, at least one of (c-1) R1, R2, and R3 is different, and / or (c-2) at least one Z having an asymmetric structure Z is included.

The present invention addresses the problem of providing a conductive paste that achieves, when used for a lithium-ion secondary battery, low internal resistance and suppression of an increase in internal resistance after repeated charging and discharging. The present invention provides a conductive paste comprising a pigment dispersion resin (A), a conductive carbon (B), an inorganic material (C), and a solvent (D), wherein the pigment dispersion resin (A) has at least one polar functional group selected from the group consisting of an amide group, imide group, ether group, hydroxy group, carboxy group, sulfonate group, phosphate group, silanol group, amino group, and pyrrolidone group, and wherein the inorganic material (C) comprises at least one member selected from the group consisting of a glass, glass ceramic, and ceramic.

In the present invention, the amount of an alkoxysilane (for example, the total amount of tetraethyl orthosilicate and an alkoxysilane having an amino group) added in a core-particle shell-forming reaction is 200 times or more by mole relative to the amount of a basic catalyst present in a shell-forming reaction solution. According to the present invention, it is possible to provide a colloidal silica in which a silicon group having an amino group has been introduced into the interior of a particle, the colloidal silica containing core-shell silica particles having a silanol group density of 4.0 particles / nm2 or less, and having a small content of microparticles.

The invention discloses an environment-friendly damping and noise-reducing coating and application thereof in an automobile chassis, and relates to the technical field of coatings. The preparation method comprises the following steps: activating the activity of silicon hydroxyl on the surfaces of hollow glass beads, carrying out esterification reaction with itaconic acid to introduce double bonds, grafting 3-mercaptopropyltrimethoxysilane through thiol alkene click reaction to prepare modified glass beads, and adding the modified hollow glass beads into a coating base material to prepare the environment-friendly damping noise-reducing coating. Dense silane chain segments are grafted on the surfaces of the microbeads to form silane layers, the rigidity and damping characteristics of the coating can be adjusted by introducing the silane layers, the coating has a higher loss factor under the action of dynamic stress, when the coating is coated on an automobile chassis, when the coating is vibrated or impacted, external mechanical energy can be effectively converted into heat energy, and the heat energy is effectively converted into heat energy. Therefore, the damping performance of the material is remarkably improved, the vibration and noise reduction effect is better achieved, and the protection effect is achieved. The environment-friendly damping noise-reducing coating prepared by the invention has the effects of vibration reduction and noise reduction.

The invention belongs to the technical field of coatings, and particularly relates to a water-based woodware varnish as well as a preparation method and application thereof. The water-based wood top-coat comprises a water-based emulsion, an organosilicon compound, a functional additive, a thickening agent, a wetting agent and water, the water-based emulsion comprises a self-crosslinking acrylic copolymer emulsion and an emulsion A; the emulsion A is selected from any one of self-crosslinking acrylic acid homopolymerized emulsion and polycarbonate modified polyurethane emulsion; the organosilicon compound comprises at least one of silane and silanol; the functional auxiliary agent comprises any one of a functional auxiliary agent 1 and a functional auxiliary agent 2; the functional additive 1 comprises a mildew preventive A and a mildew preventive B; the functional auxiliary agent 2 comprises a mildew preventive C, an ultraviolet light absorber and an ultraviolet light stabilizer; the thickeners include high shear, medium shear, and low shear polyurethane thickeners. The water-based woodware varnish disclosed by the invention has good comprehensive properties such as mildew resistance, weather resistance, chemical resistance and blocking resistance, and can be used for coating outdoor woodware or semi-outdoor woodware.

The purpose of the present invention is to provide a filler for a chromatography column, a chromatography column, a method for producing a chromatography column, a chromatography device, and an analysis method, which are suitable for separation or the like of a mixture containing various analytes. The column filler for chromatography is characterized in that the silanol group of silica contained in the filler is modified with a group represented by chemical formula (I). [Formula I]

The invention belongs to the technical field of organic silicon synthesis, and particularly relates to low-ring-content silicone oil and a preparation method thereof, and the silicone oil comprises the following components in percentage by mass: 92-97% of DMC, 0.2-0.8% of crown ether, 0.5-2% of a phosphazene alkali silicon alkoxide catalyst, 0.4-2% of a phosphosilyl ester neutralizer and 0.35-3.5% of divinyl tetramethyl disiloxane. The novel phosphazene alkali silicon alkoxide catalyst and the phosphoric acid silicon ester neutralizer are adopted, so that the'back-biting 'cyclization phenomenon is greatly restrained in the polymerization process, and the reaction conversion rate and efficiency are improved; the Fe3O4-beta-cyclodextrin composite material is selected as an adsorbent of a ring body, so that the content of cyclosiloxane is reduced, the magnetic recovery rate is high, the thermal stability is high, and the biological safety is better; the volatile component content of the prepared low-ring-content silicone oil is less than 0.2% (150 DEG C / 3h), the ring content (D3-D10) is less than 200ppm, and the ring content meets the requirements of electronics, food and medical levels.

The invention provides water dispersion resistant grouting slurry, a preparation method and application, and belongs to the field of shield construction materials. The cement, the slaked lime and the fly ash are synergistically proportioned, and the composite anti-dispersing agent is introduced, so that a stable gelling system is formed. After the composite anti-dispersing agent polyacrylamide grafted silane anti-dispersing agent encounters water, silane groups are hydrolyzed to generate silanol, a nanoscale siloxane film layer is formed on the surface of slurry, and invasion of water molecules is prevented. When the film layer is washed by water flow, unreacted silane groups can continue to be crosslinked, the damaged part is automatically filled, and the dispersion resistance is maintained. In addition, carboxyl on a molecular chain of the anti-dispersing agent reacts with a cement hydration product Ca (OH) 2 to generate calcium carboxylate, so that the cohesive force among particles is enhanced; silane groups and hydroxyl groups on the surface of the fly ash / bentonite form covalent bonds, so that the cementing material is firmly connected with the aggregate, and the water washing resistance of the whole slurry is improved.

The invention provides a fire-retardant coating and a preparation method thereof, belonging to the technical field of coatings. The coating comprises components such as organosilicon-modified epoxy resin, ammonium polyphosphate, melamine cyanurate, modified carbon nanotubes, cage-type silsesquioxane, zirconium boride-modified MOF-808, modified nano-magnesium hydroxide, rutile titanium dioxide, mica powder, vinyl polydimethylsiloxane-polymethylsiloxane silsesquioxane cross-linked polymer, methylsilanol-silicate cross-linked polymer, dimethylthiotoluenediamine curing agent, etc. The modified carbon nanotubes are carbon nanotubes modified by polyoxyethylene fatty acid esters, and the modified nano-magnesium hydroxide is nano-magnesium hydroxide modified by stearic acid. The components are used in combination to have good fire resistance, long fire resistance time, good weather resistance, and long-term performance is not likely to be greatly reduced.