1620 results about "Polysiloxene" patented technology

The invention relates to the technical field of PC transparent flame-retardant toughening modification, in particular to phenolic hydroxyl-terminated modified polysiloxane with a side chain containing phenyl and sulfonate groups and a preparation method of copolymerized PC. The modified polysiloxane is prepared by the following steps: performing ring opening polymerization on phenol-containing double end sockets and cyclotetrasiloxane to obtain modified polysiloxane containing double bonds and phenyl functional groups, and grafting sulfonate through a thiol-ene click chemical reaction. Diphenyl carbonate, bisphenol A and the modified polysiloxane are used as raw materials, a polysiloxane-PC block copolymer is formed through copolymerization, efficient flame retardance and high transparency are achieved, and meanwhile extremely high low-temperature impact strength is achieved.

The invention discloses silencing and mildew-proof organic silica gel as well as a preparation method and application thereof, and belongs to the technical field of organic silicon binding material polymers. Comprising the following components in parts by weight: 35-45 parts of nano calcium carbonate, 32-40 parts of hydroxyl-terminated polysiloxane, 5-9 parts of silencing powder, 0.5-2.5 parts of glass fiber powder, 5-9 parts of a hyperbranched polymer, 2-5 parts of a hydrophobic surface modifier, 1.5-3 parts of color paste, 1-2 parts of a water-based coupling agent, 1-2 parts of a cross-linking agent, 0.5-2.5 parts of a mildew preventive, 0.4-2 parts of a composite titanide and 0.4-0.7 part of nano silver powder. According to the invention, the nano silver powder and the mildew preventive are compounded, and an inorganic sterilization system is combined, so that broad-spectrum environment-friendly bacteriostasis is realized, and high-humidity long-acting protection is met; the powder is subjected to hydrophobic treatment, moisture is blocked, and high adhesion is kept; silencing powder serves as a core, a sound absorption network is cooperatively formed, the noise reduction capacity is improved, and the device is suitable for multiple scenes.

The invention discloses an aircraft fairing and a fairing body composite material integrated forming process, and relates to the technical field of aviation equipment manufacturing. The forming process comprises the following steps: 1) preparing a prepreg; (2) sectional forming; 3) a curing process; (4) demolding and trimming; 5) an assembly process; the whole of the front section, the middle section and the tail section of the fairing is of a long-size U-shaped streamline structure. According to the invention, through molecular collaborative design of fluorination modification-polysiloxane toughening-cyanate ester interpenetration, the key contradiction of a high-performance fairing material is systematically solved; ultrahigh strength and toughness are realized at the same time by utilizing in-situ nano microphase separation; a dense graphite carbon layer is generated through catalysis, so that efficient halogen-free flame retardance is achieved; by means of the partition design of molecular fluorination and surface metallization, the high wave transmission and lightning protection functions are ingeniously unified. And finally, a new generation of aircraft fairing composite material with force bearing, wave transmission, heat resistance, impact resistance and environmental stability is successfully prepared.

This invention discloses a PETG co-extruded composite sheet and its preparation method. The method involves adding extruder and APET masterbatch to an extruder, then layering and combining the extruder melt and APET masterbatch melt to form a composite melt with an upper and lower layer of extruder and a middle layer of APET masterbatch. This is then shaped by roller pressing to obtain the PETG co-extruded composite sheet. During the blending process of modified polyester and modified filler, the epoxy group structure in the modified polyester molecule can react with the secondary amine in the modified filler, resulting in mild cross-linking and increasing the strength of the polyester material. The modified polyester molecular chain contains polysiloxane segments, and also has polysiloxane segments branched onto its side links. When impacted, the flexible polysiloxane segments absorb and dissipate a large amount of energy through violent movement, rotation, and entanglement. Furthermore, the nano-reinforcing points formed by the cage-like silsesquioxane structure within the molecule contribute to the excellent scratch resistance of the prepared composite sheet.

The invention discloses a high-temperature-stripping-resistant epoxy structural adhesive as well as a preparation method and application thereof, and belongs to the technical field of high-performance composite materials. The epoxy structural adhesive comprises bisphenol A type epoxy resin, novolac epoxy resin, polysiloxane-polyurethane modified epoxy resin, core-shell modified epoxy resin, PEEK ultrafine powder and other components, and through mutual cooperation of all the components, the problems that in a high-temperature service environment, the adhesive layer modulus of traditional adhesive is rapidly attenuated, and a bonding interface is prone to failure are solved; the epoxy structural adhesive provided by the invention has both rapid curing and heat resistance, is stable in interface bonding, has the highest modulus of 1.28 GPa at 80 DEG C, the highest peel strength of 7.8 N / mm at 80 DEG C, and a damage mode of cohesion or high-proportion mixed damage, and is especially suitable for structural bonding requirements of harsh scenes such as peripheral structures of automobile engines, high-temperature areas of electronic equipment and the like.

The invention discloses a high-strength, low-temperature-resistant and aging-resistant polymer rubber material and a preparation method thereof in the technical field of rubber materials. The high-strength, low-temperature-resistant and aging-resistant polymer rubber material comprises the following components in parts by weight: 100-120 parts of a rubber matrix, 44-62.5 parts of an interface auxiliary agent, 8-15 parts of a vulcanization system, 4-5 parts of a protection system and 8-12 parts of a toughening agent. According to the invention, a multi-component synergistic system is constructed by the multifunctional reinforcer, amino-terminated polysiloxane, amino-terminated polybutadiene and epoxidized soybean oil, and meanwhile, a carbon black / Si-69 interface assistant and a protection / vulcanization system are optimized, so that the synergistic improvement of mechanical properties, low temperature resistance and aging resistance is achieved; the technical problems that traditional rubber is single, excellent in performance and unbalanced in comprehensive performance are solved.

The invention belongs to the technical field of polymer composite materials, and particularly relates to an efficient flame-retardant low-toxic-gas-release silicone rubber composite material and a preparation method thereof. The high-efficiency flame-retardant low-toxic-gas-release silicone rubber composite material comprises the following components in parts by weight: 100 parts of methyl vinyl silicone rubber; 10 to 20 parts of ZIF-67 modified by polysiloxane; 5-10 parts of modified nano molybdenum oxide; 5 to 10 parts of melamine cyanurate; 40 to 50 parts of mesoporous SiO2 aerogel; 1-3 parts of hydroxyl silicone oil; 0.5 to 1.5 parts of a vulcanizing agent; and 0-5 parts of an auxiliary agent. The flame-retardant and smoke-suppression performance of the silicone rubber composite material is remarkably improved through material technology innovation, and meanwhile, the mechanical property and the high temperature resistance are improved.

The invention relates to the technical field of electronic packaging materials, in particular to a thermosetting resin composition for packaging a high-reliability semiconductor device. The composition comprises multifunctional epoxy resin, XYLOK phenolic resin, a curing accelerator, a modifier and an inorganic filler, and the modifying agent is eugenol phthalonitrile polysiloxane. The modifier has good mechanical compatibility and dispersity in matrix resin; and when being applied to a thermosetting resin system, the epoxy resin can improve the processability and effectively enhance the toughness of a cured product. The composition provided by the invention accords with the processing and forming process of the existing epoxy molding compound; according to the present invention, the spiral flow length of the molding compound is substantially increased, the processing performance is good, the cured product has advantages of good thermal stability, low bending modulus, good impact property and good heat and humidity resistance, and the glass transition temperature is increased. The resin is significantly improved in comprehensive performance, and is suitable for packaging semiconductor devices with high requirements on reliability and environmental stability.

The invention discloses a strong acid and alkali resistant plastic material for fume hood surface decoration and a preparation method of the strong acid and alkali resistant plastic material, belongs to the technical field of plastic material processing, and aims at solving the technical problem that in the prior art, the acid and alkali resistance and the bending modulus of a plastic material for fume hood surface decoration need to be further improved. The preparation method specifically comprises the following steps: stirring amino-modified fluorosilicone resin, paraformaldehyde and 1, 4-dioxane in a reaction kettle, dropwise adding an anacardol solution, heating the reaction kettle to 85-95 DEG C, carrying out heat preservation reaction for 6-8 hours, and carrying out post-treatment to obtain the anacardol-based benzoxazine resin. Perfluoro-modified polysiloxane benzoxazine is prepared, naphthalene-containing epoxy resin and imidazole-modified silicon carbide microspheres are compounded, in-situ catalysis synergistic curing is carried out by using filler interface imidazole, a compact organic-inorganic hybrid interpenetrating network is constructed, and the strong acid and alkali corrosion resistance and bending modulus of the material are remarkably improved.

The invention relates to the technical field of grinding fluid, in particular to efficient grinding fluid for an MPO connector, a preparation method and application of the efficient grinding fluid for the MPO connector. 27%-44% of alpha-aluminum oxide; 8%-15% of a styrene-maleic anhydride copolymer; 2%-5% of a modified polyurea solution; 0.05% to 0.3% of perfluoropolyether; 0.5%-2% of citric acid; 0.5%-1.5% of a polyether modified polysiloxane defoaming agent; by adopting a composite abrasive material system of the nano-diamond and the alpha-aluminum oxide, the grinding efficiency and the surface quality are improved in a breakthrough manner.

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.

The invention discloses Si-based MAX phase powder and a preparation method thereof, and belongs to the technical field of ceramic material preparation. The preparation method of the Si-based MAX phase powder comprises the following steps: mixing a transition metal source, polysiloxane, a solvent, a curing agent and a platinum catalyst to obtain a mixed solution; the curing agent is vinyl modified siloxane; heating and curing the mixed solution to obtain a solid precursor; and crushing the solid precursor into powder, and then carrying out pressureless sintering in a protective atmosphere, thereby obtaining the product. According to the method, subsequent ball milling and other procedures are omitted, and impurity introduction to the product is avoided. According to the invention, the operation difficulty is greatly reduced, the production efficiency is improved, the energy consumption is reduced, and large-scale and low-cost production is realized.

The invention relates to the technical field of ceramics, and particularly discloses green special refractory ceramic slurry as well as a preparation method and application thereof. The green special refractory ceramic slurry is prepared from aluminum oxide, methyltrimethoxysilane-phosphoric acid modified polysiloxane, fluorocarbon emulsion, expanded vermiculite powder, silane coupling agent modified feldspar tailing powder, a dispersing agent, an organic silicon defoaming agent, a polyurethane curing agent and deionized water. After being sintered, the green special refractory ceramic slurry provided by the invention has excellent high-temperature stability, corrosion resistance, thermal shock resistance and mechanical strength, and solves the problems of low high-temperature-resistant upper limit and poor corrosion resistance of the traditional slurry, so that the sintered ceramic adapts to severe high-temperature working conditions such as steel plant converter liners and chemical high-temperature reaction kettle inner walls; and long-term protection requirements of industrial equipment are met.

Disclosed in the present application are an antibacterial anti-scale silica gel material, and a preparation method therefor and the use thereof. Raw materials for preparing the silica gel material comprise a component A and a component B, wherein the component A comprises vinyl polysiloxane, a first silane coupling agent, fumed silica and a platinum catalyst; and the component B comprises vinyl polysiloxane, a first silane coupling agent, fumed silica, hydrogen-containing polysiloxane, an inhibitor and a composite scale-inhibiting antibacterial material, the composite scale-inhibiting antibacterial material being prepared by encapsulating a scale inhibitor and an antibacterial agent in cyclodextrin. In the present invention, the scale inhibitor and the antibacterial agent are encapsulated in cyclodextrin under certain conditions so as to prepare the composite scale-inhibiting antibacterial material; then, under the action of the platinum catalyst, the composite scale-inhibiting antibacterial material undergoes graft polymerization with the vinyl polysiloxane, and the vinyl polysiloxane also undergoes a homopolymerization and autopolymerization reaction, thereby preparing a silica gel material bonded with an antibacterial anti-scale sustained-release body; and the prepared silica gel material ensures that the scale inhibitor and the antibacterial agent can be slowly released outwards in a usage scenario, thereby achieving long-term scale-inhibiting and antibacterial effects.

The invention relates to the technical field of waste gas treatment, and particularly discloses waste gas treatment liquid for treating large-air-volume low-concentration waste gas through a water-based method. The waste gas treatment liquid for treating the large-air-volume low-concentration waste gas through the water-based method comprises a surfactant, a defoaming agent, a dissolution accelerant and water. Wherein the surfactant can be selected from any one or more of polyoxyethylene alkyl ether, polyoxyethylene alkyl ether and polyoxyethylene fatty acid ester; the dissolution accelerant can be selected from any one or more of ethylene glycol monobutyl ether, diethylene glycol monobutyl ether and triethylene glycol monobutyl ether; the defoaming agent is any one or more of butanol, dimethyl silicone oil, silicone and polyether modified polysiloxane. When the waste gas absorption liquid obtained in the invention is used for treating waste gas, the absorption efficiency of methanol, butanol, benzene, toluene, xylene, ethyl acetate, dichloromethane and acetone is obviously improved, and the absorption efficiency of the waste gas absorption liquid on aromatic hydrocarbon, halogenated hydrocarbon, alcohol, ketone and ester pollutants is improved.

The invention relates to a double-layer Si-Zr self-reaction coating and a preparation method thereof, and belongs to the technical field of carbon ceramic ablative materials. B4C powder is subjected to ball milling and crushed until the diameter is smaller than 100 nm, ZrSi2 alloy is added and evenly mixed with B4C subjected to ball milling, a polycarbosilane solution is added for ball milling, ZrSi2 slurry wrapped by B4C is obtained and dried, and ZrSi2 powder wrapped by B4C is obtained; adding the powder into a polysiloxane solution containing SiC powder, and mechanically and sufficiently mixing to obtain slurry; spraying the slurry on the surface of the C / C material through pressurization, and drying to obtain the coating material. The coating comprises the polysiloxane-containing SiC layer on the outer layer and the B4C-ZrSi2 layer on the inner layer, in the oxidation ablation process, the crack effect of the coating on the surface layer can be achieved within a certain time, and the oxidation rate of the material is greatly decreased.

The invention relates to the field of cables, and discloses a flame-retardant extruded and insulated low-voltage power cable, which comprises a conductor core, an insulating layer, a filling layer, an inner sheath layer, an armor layer and an outer sheath layer, and is characterized in that the sheath layer is made of low-density polyethylene, ethylene propylene diene monomer, ethylene-tetrafluoroethylene copolymer, modified halloysite nanotubes, modified ammonium polyphosphate and auxiliaries; the modified halloysite nanotube is prepared by loading titanium dioxide on the surface of a halloysite nanotube by using a sol-gel method and then grafting octa-aminopropyl polyhedral oligomeric silsesquioxane; the modified ammonium polyphosphate is prepared by grafting a functional silane coupling agent prepared by reacting a cyclotriphosphazene derivative with 3-chloropropyltrimethoxysilane with polysiloxane-coated ammonium polyphosphate, and the cyclotriphosphazene derivative is prepared by reacting 3-amino-1, 2, 4-triazole with hexachlorocyclotriphosphazene and then coordinating with cobalt ions by adopting a hydrothermal method. Therefore, the material is endowed with good mechanical properties, ultraviolet resistance, heat and wear resistance, flame retardance and antibacterial activity.

A gas separation membrane for permeating and separating carbon dioxide from a mixed gas containing the carbon dioxide includes: a sheet-shaped support layer; and a separation layer provided on one surface of the support layer, the separation layer having a function of selecting and separating carbon dioxide and being formed of a polymer containing a polyethylene oxide structural unit and a polysiloxane structural unit. The separation layer has an average thickness of 1 nm or more and 500 nm or less. When an XPS spectrum of the separation layer is obtained by X-ray photoelectron spectroscopy and a Si2p peak and a C1s peak included in the XPS spectrum are each subjected to waveform separation, an intensity ratio P(Si—O) / P(C—O) of a Si—O peak intensity P(Si—O) to a C—O peak intensity P(C—O) is 0.03 or more and 2.0 or less.

The invention discloses yellowing-resistant light-cured organic silicon resin and a preparation method thereof, and belongs to the technical field of light-cured resin. The resin is prepared from the following raw materials in parts by weight: 80 to 100 parts of vinyl-terminated polysiloxane, 15 to 25 parts of trimethylolpropane tri (3-mercaptopropionate), 1 to 3 parts of yellowing-resistant aid, 2 to 4 parts of photoinitiator and 0.5 to 1 part of flatting agent. When the resin is prepared, the raw materials are uniformly mixed under a dark condition, and the resin is obtained after vacuum defoaming. Wherein the yellowing-resistant auxiliary agent is a benzotriazole ultraviolet light absorber and is synthesized through a multi-step reaction, the structure simultaneously contains a benzotriazole ring and anthryl, and the benzotriazole ring and the anthryl have a synergistic effect so that ultraviolet rays can be efficiently absorbed and yellowing can be inhibited. The obtained resin has excellent yellowing resistance and high curing speed, and is suitable for the fields of coatings, printing ink, adhesives, electronic packaging and the like.

The invention discloses a battery thermal runaway self-inhibition coating based on a heat absorption type reverse thermit reaction as well as a preparation method and application thereof. The battery thermal runaway self-inhibition coating comprises the following raw materials in percentage by weight: 40-60% of Fe2O3, 15-25% of Al powder, 20-35% of a heat absorption additive, 5-10% of a binder and 0-5% of a trigger regulator, the heat absorption additive is Bi2O3 or SrCO3; the binder is a potassium silicate aqueous solution or high-temperature-resistant polysiloxane resin; the trigger regulator is copper oxide or manganese dioxide. The coating is not a single functional material, but is a'reaction system ', an thermit reaction is converted into an endothermic reaction by introducing an endothermic additive, and a product of the coating can be fused and sintered in situ to generate a compact porous ceramic-metal composite heat insulation layer during the endothermic reaction, so that a battery cell can be isolated in space, and the performance of the battery cell is improved. And heat radiation can be effectively blocked due to low heat conductivity, so that double insurance of heat absorption and isolation is realized.

The invention provides a high-elasticity tear-resistant silicone rubber material and a preparation method thereof.The high-elasticity tear-resistant silicone rubber material is characterized by being prepared from, by mass, 100 parts of vinyl polysiloxane, 5-15 parts of phenylboronic acid end group modified polydimethylsiloxane and 1-5 parts of 2, 3-dihydroxypropyl disulfide, the adhesive comprises the following components in parts by mass: 10-30 parts of fumed silica, 1-5 parts of a cross-linking agent, 1-2 parts of a plasticizer and 0.001-0.005 part of a catalyst. By introducing the combination of phenylboronic acid end group modified polydimethylsiloxane and 2, 3-dihydroxypropyl disulfide, a dual dynamic covalent bond network with a stress triggering characteristic is constructed in a silicone rubber system, and when the material is subjected to external force, a disulfide bond is used as a sacrificial unit to preferentially break to dissipate energy and generate micro-voids, so that the stress triggering performance of the material is improved. And then stress-triggered boric acid ester bond dynamic recombination further disperses stress and stabilizes a micro-cavity structure, so that graded dissipation of energy is realized, crack propagation is reduced, and the elasticity and tear resistance of the material are improved.

The invention discloses an algicidal and bacteriostatic room temperature vulcanized silicone rubber insulating material and a preparation method thereof, and belongs to the technical field of electrical insulating materials. The material is composed of quaternary ammonium salt group-containing hydroxyl-terminated polysiloxane (QASPS) as a base adhesive, a solvent, a reinforcing filler, a cross-linking agent and a catalyst, wherein the QASPS is used for grafting a quaternary ammonium salt group derived from quaternization reaction of N, N-dimethyl octylamine and chloropropyl to a polysiloxane main chain through a covalent bond. Through molecular structure innovation, the antibacterial components are stably immobilized in a cross-linked network, and the problem that the insulativity is affected due to the fact that an antibacterial agent added in a traditional physical mode is easy to dissolve out is fundamentally solved. The prepared silicone rubber material has long-acting antibacterial property, excellent electrical insulation property and good mechanical strength, is particularly suitable for solving the problem of microbial aging on the outer insulation surface of power equipment in high-humidity areas such as tropical areas and subtropical areas, and ensures safe and stable operation of a power grid.

The invention relates to the technical field of high polymer materials, and discloses a PVC (polyvinyl chloride) pipe for communication wiring and a preparation method thereof, and the pipe is prepared from polyvinyl chloride resin, a calcium-zinc composite heat stabilizer, stearic acid, polyethylene wax, maleic anhydride grafted polyethylene, an acrylate processing aid, nano calcium carbonate and an active lubricating precursor. The active lubricating precursor is a mixture formed by compounding amino-terminated polysiloxane and zinc stearate through heating and swelling. The preparation method of the PVC pipe for communication wiring comprises the steps of pre-preparation of the active lubricating precursor, multi-stage temperature-control high-speed mixing and reactive extrusion molding. Through in-situ chemical reaction of amino-terminated polysiloxane and maleic anhydride grafted polyethylene in the extrusion process, chemical anchoring of lubricating molecules is realized, the problem of precipitation of a lubricant is solved, and meanwhile, the lasting smoothness, impact strength and dimensional stability of the inner wall of the pipe are improved by cooperating with nano calcium carbonate.

The invention relates to the technical field of coatings, discloses a multifunctional fireproof and waterproof polysiloxane coating and a preparation method thereof, and aims at solving the problems that the hydrophobic function of an existing fireproof and waterproof polysiloxane coating is irreversibly lost after a fire disaster, and the fireproof and waterproof synergistic performance is remarkably attenuated in a medium-high-temperature environment. Hydroxyl-terminated methyl phenyl siloxane is used as matrix resin, and is matched with a flame-retardant system composed of melamine modified ammonium polyphosphate, pentaerythritol and amino modified nano-montmorillonite, a hydrophobic repair system composed of polysiloxane capsule wall fluorosilane microcapsules, an interface modifier compounded by an epoxy group and an amino silane coupling agent, and a special auxiliary agent. A three-dimensional covalent network is constructed to anchor all the components, efficient charring and temperature response type hydrophobic repair are achieved, the finished product is prepared through microcapsule preparation, modified flame retardant compounding and coating main body blending, and the finished product has excellent fireproof and waterproof performance, a renewable hydrophobic function after a fire disaster and stable performance at medium and high temperatures and is suitable for industrial long-term protection scenes.

The invention provides a high-rheology lasting type coating and a preparation method of the high-rheology lasting type coating. The coating is prepared from the following raw materials: 6 to 12 parts of fluorosilicone grafted hyperbranched polyurethane core-shell functional microspheres, 2 to 5 parts of graphene-nano silicon dioxide composite rheological regulator, 25 to 35 parts of epoxy acrylate resin, 15 to 25 parts of polysiloxane modified waterborne polyurethane acrylate emulsion, 8 to 15 parts of filler, 0.8 to 1.6 parts of rheological agent, 1.8 to 7.1 parts of functional additive, 10 to 18 parts of solvent and 0.1 to 0.3 part of preservative. The obtained coating has high thixotropy, excellent long-acting durability and multiple protection effects of fire prevention, water prevention, pollution resistance and the like, and meanwhile, the fidelity of a coating mold pressing structure and the construction applicability can be guaranteed.

The invention relates to a high-efficiency low-toxicity fireproof heat-insulation composite coating and a preparation method thereof, and the preparation raw materials of the high-efficiency low-toxicity fireproof heat-insulation composite coating comprise the following components in parts by weight: 20-30 parts of modified polysiloxane, 15-25 parts of ammonium polyphosphate, 8-15 parts of melamine, 15-28 parts of an inorganic filler, 10-15 parts of water, 5-10 parts of a cosolvent, and 1-3 parts of a functional auxiliary agent. The modified polysiloxane is an A-B-C type three-section type block copolymer, wherein the A section is a polydimethylsiloxane or methyl phenyl siloxane block; the segment B is an organic silicon chain segment containing a phosphazene structural unit; and the segment C is a polyethylene glycol or polyoxyethylene block. According to the invention, the modified polysiloxane is cooperated with the ammonium polyphosphate salt and the melamine, so that the composite coating has the effects of high-efficiency fire prevention and heat insulation, low toxicity, environment friendliness and excellent film forming performance.

The invention provides a low-viscosity and high-strength modified epoxy resin grouting material which is mainly prepared from a component A and a component B in a mass ratio of (2: 1)-(3: 1) during use, carboxyl-terminated modified epoxy resin is adopted, and a carboxyl group with strong hydrophilicity and a hydroxyl group generated in the modification process are introduced into an epoxy resin molecular chain, so that the high-strength modified epoxy resin grouting material is obtained. According to the epoxy resin grouting material and the preparation method thereof, the affinity of the epoxy resin grouting material to water molecules is greatly enhanced, hydrophilic groups of modified epoxy molecules extend into a water covering layer in a crack of a building body, the defect that an existing grouting material is incompatible with the water covering layer is overcome, the surfactant contains a defoaming polysiloxane component, particles can be uniformly dispersed in a mixture, and the grouting effect is improved. A good dispersion effect is achieved; the silane coupling agent is added, so that the performance and the bonding strength of the epoxy resin grouting material are also improved.

The invention relates to a preparation method of a polysiloxane defoaming composition. The polysiloxane defoaming composition is prepared from silicone grease, a polyether-polysiloxane copolymer, a surfactant and polyether. The silicone grease is prepared from the following raw materials: branched polysiloxane, hydrogen-containing polysiloxane, silicon dioxide, a TQ polymer, an addition catalyst and an inhibitor; the polyether-polysiloxane copolymer is prepared from hydrogen-containing silicon resin with a spatial structure, diallyl alcohol polyether and allyl polyether through a reaction. The polysiloxane defoaming agent composition obtained by the invention has the characteristics of excellent foam control and easiness in cleaning.

The invention relates to the technical field of coatings, in particular to an epoxy resin-based water-based corrosion-resistant and weather-resistant coating and a preparation method of the epoxy resin-based water-based corrosion-resistant and weather-resistant coating. A composite modified inorganic filler composed of siloxane modified epoxy resin, modified polysiloxane, rare earth cerium modified graphene, silane modified calcium carbonate oligomer and surfactant-silane composite modified kaolin is compounded; a composite modifier consisting of propylene glycol diacetate, dipropylene glycol butyl ether and diethylene glycol butyl ether and an isopropanol / water mixed solvent are matched, so that the contradiction between the water resistance and the structural stability of the existing water-based paint is effectively solved, and the anticorrosion durability, the weather resistance, the mechanical strength, the adhesive force and the storage stability of the coating are remarkably improved; good water-based dispersity and construction applicability are kept, and the coating can be suitable for long-acting corrosion protection of base materials such as metal components, industrial equipment and building outer walls and has a wide application prospect.

The invention relates to an epoxy resin adhesive composition and a preparation method thereof, and belongs to the technical field of high-performance polymer material modification and electronic packaging materials, and the epoxy resin adhesive composition comprises the following components by weight: 100 parts of basic epoxy resin; 5-30 parts of a hyperbranched liquid crystal modifier; adding the curing agent according to a stoichiometric ratio; 100 to 600 parts of a heat-conducting filler; 0.1-5 parts of an accelerant and an auxiliary agent; the hyperbranched liquid crystal modifier has a core-shell structure and is prepared from a hydrogen-containing hyperbranched polysiloxane core and an alkenyl-terminated liquid crystal epoxy monomer through a hydrosilylation reaction under the action of a catalyst, the hyperbranched polysiloxane core is introduced, the friction resistance among high-concentration fillers is reduced by utilizing the torispherical structure of the hyperbranched polysiloxane core, and the hyperbranched liquid crystal modifier has the advantages that the friction resistance is reduced; under the condition that 350 parts of heat-conducting filler is filled, the modifier is added, so that the high-filling system still has excellent flowability and leveling property while keeping high heat-conducting property, and is suitable for high-precision micro-encapsulation scenes; the heat conductivity of the scheme is obviously superior to that of a system which does not use the modifier or does not adopt a stepped heating process.