133 results about "Octamethylcyclotetrasiloxane" patented technology

The invention relates to the technical field of fabric waterproofing agents, in particular to a polyurethane modified organic silicon fluoride-free waterproofing agent and a preparation method thereof. The polyurethane modified organic silicon fluoride-free waterproof agent is prepared from the following raw materials in parts by mass: 5 to 15 parts of hexamethylene diisocyanate, 5 to 15 parts of butyl acrylate, 1 to 5 parts of methyl methacrylate, 40 to 60 parts of octamethylcyclotetrasiloxane, 10 to 30 parts of alpha, omega-dihydroxy polydimethylsiloxane and 5 to 10 parts of gamma-aminopropyl methyl diethoxy silane. The invention relates to a silane coupling agent, which is prepared from the following raw materials in parts by weight: 1 to 5 parts of glycidyl ether oxypropyl trimethoxy silane, 0.1 to 1 part of tetramethylammonium hydroxide, 0.1 to 1 part of triethylamine, 2 to 5 parts of tetraethoxysilane, 0.2 to 0.75 part of ammonia, 0.1 to 1 part of silane coupling agent KH-570, 0.01 to 0.1 part of dibutyltin dilaurate, 1 to 5 parts of epsilon-caprolactam, 1 to 2 parts of emulsifier and 0.1 to 1 part of initiator. The fabric treated by the method has good softness and excellent hydrophobic effect.

The invention discloses an acid and alkali resistant and salt spray resistant coating and a preparation method thereof, and relates to the field of coatings. When the acid and alkali resistant and salt fog resistant coating is prepared, 4-imidazole formaldehyde reacts with 3-aminopropyldimethoxymethylsilane and 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, and then reacts with hexamethyldisiloxane, octamethylcyclotetrasiloxane and 2, 4, 6, 8-tetramethylcyclotetrasiloxane to prepare modified polysiloxane; the preparation method comprises the following steps: reacting graphene oxide with 3-aminoethyl thiophene, 3-hexylthiophene and 3-allyl thiophene to prepare modified graphene; the preparation method comprises the following steps: uniformly mixing modified graphene, 1, 3-divinyl-1, 1, 3, 3-tetramethyldisiloxane platinum, a defoaming agent and modified polysiloxane to obtain a component A, taking waterborne epoxy emulsion as a component B, and uniformly mixing the component A and the component B to obtain the acid-alkali-resistant salt-fog-resistant coating. The prepared acid-alkali-resistant salt-fog-resistant coating has good acid-alkali-resistant, salt-fog-resistant, flame-retardant and hydrophobic properties.

The invention discloses an anti-ultraviolet automobile window film and a preparation method thereof, and relates to the field of high polymer materials. When the anti-ultraviolet automobile window film is prepared, methylcyclotetrasiloxane, octamethylcyclotetrasiloxane, 3-glycidyl propyl (dimethoxy) methylsilane and 1, 3-bis (3-aminopropyl)-1, 1, 3, 3-tetramethyldisiloxane are subjected to a reaction, and modified polysiloxane is prepared; the preparation method comprises the following steps: reacting benzo [1, 2-d: 5, 4-d '] bis (oxazole)-2, 6-dithiol with 4-aminobenzoyl chloride to prepare a modified ultraviolet absorbent; isophorone diisocyanate, polytetrahydrofuran ether glycol, the modified polypyrrole particles, the modified polysiloxane and the modified ultraviolet absorbent are subjected to a reaction, and the reaction product is spread in a mold. The anti-ultraviolet automobile window film prepared by the invention has good anti-ultraviolet, heat-insulating, flame-retardant and anti-aging properties and good mechanical properties.

The invention relates to the field of coatings, and discloses a self-cleaning nano-coating glass plate and a preparation method and application thereof.The nano-coating is prepared from organic silicon resin, epoxy resin, modified nano titanium dioxide, long-chain alkyl methyl silicone oil, a curing agent and a diluent; the modified nano titanium dioxide is prepared by grafting a modified silane coupling agent and nano titanium dioxide, wherein the modified silane coupling agent is prepared by reacting a modified phosphorus-containing antibacterial monomer with vinyltriethoxysilane; the modified phosphorus-containing antibacterial monomer is prepared by reacting eugenol with N-bromosuccinimide, then reacting with 2-amino-4-methylthiazole, further reacting with diphenyl phosphinyl chloride, and reacting the obtained phosphorus-containing antibacterial monomer with 1, 1, 3, 3-tetramethyldisiloxane; the long-chain alkyl methyl silicone oil is prepared by using octamethylcyclotetrasiloxane, dodecyl methyl dimethoxy silane and hexamethyldisiloxane as raw materials, and the prepared nano coating has a super-hydrophobic surface and also has excellent antibacterial activity, wear resistance and flame retardance.

The invention discloses a UV photocuring adhesive, a preparation method thereof and an application of the UV photocuring adhesive in the electronic field, and relates to the field of adhesives. The preparation method comprises the following steps: when the UV photocuring adhesive is prepared, carrying out a reaction on dihydroxyl modified 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, p-phenylene diisocyanate, polyethylene glycol and 2-ethyl-4-methylimidazole, so as to obtain imidazole-terminated isocyanate, and carrying out a reaction on the imidazole-terminated isocyanate and the 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, so as to obtain the UV photocuring adhesive. The modified lignin, butanediamine and N, N '-methylene bisacrylamide are subjected to a reaction, and a double-bond reactant is prepared; the preparation method comprises the following steps: reacting epoxy-terminated siloxane with octamethylcyclotetrasiloxane, tetramethyltetravinyl cyclotetrasiloxane and tetramethylammonium hydroxide to obtain modified siloxane, and finally, uniformly mixing imidazole-terminated isocyanate, a double-bond reactant, modified polysiloxane and benzoin butyl ether to obtain the polyurethane adhesive. The UV light-cured adhesive prepared by the invention has good adhesive property, anti-aging property and flame retardant property.

The invention relates to the technical field of epoxy resin coatings, in particular to a radiation-resistant self-repairing epoxy resin coating and a preparation method thereof. The radiation-resistant self-repairing epoxy resin coating comprises the following raw materials: a component A, a component B and a component C, wherein the mass ratio of the component A to the component B to the component C is (50-70): (40-50): (10-20); the component A comprises the following raw materials in parts by mass: 50-60 parts of bisphenol F epoxy resin, 8-12 parts of calix [5] arene, 1-2 parts of zinc acetylacetonate and 15-20 parts of a solvent; the component B is prepared from the following raw materials in parts by mass: 30 to 40 parts of octamethylcyclotetrasiloxane, 5 to 10 parts of gamma-aminopropyltriethoxysilane, 1 to 3 parts of vanillin, 0.5 to 1 part of a catalyst and 0.1 to 0.3 part of p-toluenesulfonic acid; and the component C is an amine curing agent.

The invention relates to the field of high polymer materials, and discloses a high-transparency and high-tear-resistance gas-phase silicone rubber composite material which is prepared by reacting raw materials containing the following components, the base rubber is an octamethylcyclotetrasiloxane (D4) monomer with the purity of more than or equal to 99.5%, and the content of hydrogen-containing siloxane impurities is less than or equal to 50ppm after vacuum distillation treatment; the nano filler is a core-shell type TiO2 coated SiO2 filler, the particle size of inner core TiO2 is 20 nm, the thickness of an outer shell SiO2 layer is 5-8 nm, the surface of the SiO2 layer is grafted with a silane coupling agent KH-570, and the grafting rate is larger than or equal to 85%; the flexibilizer is a hyperbranched organic silicon flexibilizer with the branching degree being greater than or equal to 80%; the initiator is a peroxide initiator DCP; the block ratio of the styrene-vinyl siloxane block copolymer is 3: 1, the shore hardness of the composite material is 70 degrees, the light transmittance is larger than or equal to 92%, and the tearing strength is larger than or equal to 35 kN / m. Compared with the prior art, the high-performance gas-phase silicone rubber provided by the invention has the advantages of high light transmittance and high tear strength, and has great technical value and economic significance.

The invention discloses a waterproof high-temperature-resistant low-temperature-resistant UV (ultraviolet) photocuring adhesive and a preparation method thereof, and relates to the field of photocuring adhesives. When the waterproof, high-temperature-resistant and low-temperature-resistant UV photocuring adhesive is prepared, clay, maleic anhydride and 2, 6-diaminopyrazine are uniformly mixed to prepare modified clay; the preparation method comprises the following steps: reacting epoxy resin with phosphoric acid di (hydroxyethyl acrylate) ester to obtain modified resin; octamethylcyclotetrasiloxane, mercaptopropyl methyl dimethoxy silane, trifluoropropyl methyl dimethoxy silane and hexamethyldisiloxane are subjected to a reaction, and modified organic silicon is obtained; and uniformly mixing the modified resin, the modified clay, methylboronic acid and the modified organic silicon to obtain the waterproof high-temperature-resistant low-temperature-resistant UV photocuring adhesive. The waterproof, high-temperature-resistant and low-temperature-resistant UV photocuring adhesive prepared by the invention has excellent flame retardance, waterproofness, high-temperature resistance and low-temperature resistance.

The invention discloses a 27.5 KV positive feeder insulation coating material and a preparation method thereof, and relates to the field of coatings. The 27.5 KV positive feeder insulation coating material prepared by the invention is prepared by the following steps: reacting furan with 6-bromo-1-hexene to obtain a comonomer, and reacting the comonomer, polytetrafluoroethylene and ethylene to obtain a copolymer; the preparation method comprises the following steps: protecting maleic anhydride by furan, reacting with 3-aminopropyl methyl dimethoxy silane, performing deprotection to obtain modified silane, and reacting the modified silane with octamethylcyclotetrasiloxane to obtain polysiloxane; the copolymer, the modified polysiloxane, the antioxidant 1010 and methylbenzene react to prepare a base material, and then the base material, the coupling agent and the wear-resistant agent are evenly mixed and discharged to prepare the wear-resistant coating. The 27.5 KV positive feeder insulation coating material prepared by the invention has good tensile strength and self-repairing performance, can realize self-repairing under a heating condition, and prolongs the service cycle of the material.

The present invention relates to a bridge surface waterproofing method having excellent waterproofness and constructability. The present invention provides a bridge surface waterproofing method comprising the steps of: evenly preparing the surface of a bridge surface; forming a primer layer on the surface of the bridge surface; forming a waterproofing layer that is from 2 mm to 4 mm by applying a bridge surface waterproofing agent composition onto the primer layer so that the waterproofing layer is inclined in a specific direction of the bridge surface; and forming an asphalt layer on the waterproofing layer, wherein the bridge surface waterproofing agent composition comprises 40 to 60 wt% of asphalt, 5 to 10 wt% of styrene butadiene styrene, 5 to 10 wt% of ethylene glycol dimethacrylate, 3 to 5 wt% of octamethylcyclotetrasiloxane, 5 to 10 wt% of silica particles having an average particle diameter of 200 to 400 nm, 5 to 10 wt% of silica particles having an average particle diameter of 700 to 1000 nm, 3 to 8 wt% of methyl methacrylate, 1 to 3 wt% of 4-hydroxy-3-methoxybenzoic acid, 5 to 10 wt% of a fiber reinforcing material, 1 to 3 wt% of a dispersant, 1 to 3 wt% of a viscosity modifier, and 1 to 3 wt% of a tackifier.

The application discloses a preparation of low-yellowing polyether modified amino silicone oil and a fabric finishing agent containing the same, and relates to amino silicone oil and application thereof. The application uses octamethylcyclotetrasiloxane and 3-piperazinylpropylmethyldimethoxysilane as key raw materials, converts original primary amino groups into secondary amino groups on the basis of traditional amino silicone oil, simultaneously pays attention to control of the molecular mass of the modified amino silicone oil, significantly improves the chemical stability and oxidation resistance of the silicone oil, and secondarily modifies the silicone oil by using allyl epoxy polyether, so that the originally non-hydrophilic amino silicone oil obtains certain hydrophilicity, and the self-emulsifying ability of the silicone oil and the stability of the emulsion are significantly improved. Through the modification, the final silicone oil molecular chain segment can be repeatedly and directionally arranged on the fiber surface in the form of alternating polyether and polysiloxane structure, so that the finishing agent has good hydrophilicity, softness and washability for finishing fabrics.

The invention relates to the field of textile functional finishing agents, in particular to an organosilicon waterproof finishing agent and a preparation method thereof.The preparation method comprises the steps that octamethylcyclotetrasiloxane, hexamethyldisiloxane, tetramethylcyclotetrasiloxane and an initiator are mixed to react, and side chain hydrogen-containing silicone oil is obtained through filtering; the preparation method comprises the following steps: mixing side chain hydrogen-containing silicone oil with 4-vinyl epoxy cyclohexane and a methacrylate compound, reacting under the protection of nitrogen, and adding a catalyst to obtain modified silicone oil; mixing and reacting the modified silicone oil with a coupling agent to obtain amino modified silicone oil; the preparation method comprises the following steps: mixing side chain hydrogen-containing silicone oil with allyl polyethylene glycol for reaction to obtain a nonionic silicon-containing surfactant; and finally, mixing the amino modified silicone oil with a nonionic silicon-containing surfactant, adding an acid solution, and adding water for emulsification to obtain the organosilicon waterproof finishing agent. Through the specific modified silicone oil and the nonionic silicon-containing surfactant, a uniform and stable waterproof film is formed on the surface of the fabric, the waterproof grade is improved, and the waterproof finishing agent is suitable for waterproof finishing of various fabrics.

The invention belongs to the field of organosilicon polymer chemistry, and particularly discloses an organosilicon polymer, a self-emulsifying silicone oil emulsion and a preparation method. The organic silicon polymer is formed by polymerizing a monomer shown in a formula I and a monomer shown in a formula II; wherein the mass ratio of the monomer shown in the formula I to the monomer shown in the formula II is (1-9): 1; in the formula I, X is 25 to 450, and R is a C1-C18 alkyl group, a phenyl group, or a C1-C18 alkyl group with 1 to 2 amino substituent groups, and in the formula II, X is 25 to 450, and R is a C1-C18 alkyl group, a phenyl group, or a C1-C18 alkyl group with 1 to 2 amino substituent groups. Starting from the initial raw material octamethylcyclotetrasiloxane, the organosilicon polymer can be prepared by only three steps; the process is short and time is reduced; because hydrogen-containing silicone oil is not involved in the preparation process, byproducts are not generated, and water washing is not needed in the preparation process, so that water consumption and energy consumption are reduced.

The invention relates to glue for bonding a high-temperature electrostatic chuck as well as a preparation method and application thereof, and relates to the technical field of glue. The glue is prepared from the following components in parts by weight: 28 to 40 parts of octamethylcyclotetrasiloxane, 35 to 40 parts of aluminum oxide, 2 to 4 parts of calcium carbonate, 3 to 5 parts of silicon oxide, 2 to 4 parts of polymer filler, 2 to 5 parts of silicate, 5 to 8 parts of non-oxide filler, 3 to 6 parts of organic acid ester, 2 to 5 parts of tin catalyst and 1 to 2 parts of silane coupling agent. During preparation, aluminum oxide and octamethylcyclotetrasiloxane are firstly subjected to ball milling for 8 hours, and then other raw materials are added for ball milling for 16 hours. The glue has high thermal conductivity, excellent high temperature resistance, good mechanical strength and high bonding tensile strength, and can maintain good corrosion resistance at the working temperature of 400 DEG C or above if being applied to high-temperature bonding of the electrostatic chuck.

The invention relates to the technical field of rubber composite materials, and discloses fluorinated silicone rubber as well as a preparation method and application thereof. The method comprises the following steps: in the presence of a catalyst, carrying out first reaction on a hydrolytic polymerization product of gamma-aminopropyl methyl diethoxy silane and octamethylcyclotetrasiloxane to obtain a first reaction product; and dropwise adding 1, 3, 5-tri (3, 3, 3-trifluoropropyl)-1, 3, 5-trimethylcyclotrisiloxane into the first reaction product, and adding an end-capping reagent to carry out a second reaction after dropwise adding is completed, thereby obtaining the fluorosilicone rubber. According to the fluorosilicone rubber provided by the invention, amino is introduced into a molecular chain, and hydrogen bond interaction can be formed between fluorine and nitrogen; the fluorosilicone rubber is further compounded with assistants such as a nanofiller, the side group fluorine and the amido form a hydrogen bond with the hydroxyl group on the surface of the nanofiller, and the interaction between molecular chains is increased, so that the low-temperature damping performance of the fluorosilicone rubber composite material is improved.

The invention discloses a novel fluffy softening agent extremely resistant to salt, alkali and high temperature, a preparation method and application, and relates to the technical field of textile printing and dyeing auxiliaries. The fluffy softening agent is prepared from the following raw materials in parts by weight: 30 to 50 parts of octamethylcyclotetrasiloxane, 10 to 20 parts of polyether epoxy end-capping reagent, 5 to 15 parts of organic silicon derivative, 1 to 3 parts of emulsifier, 2 to 6 parts of surfactant, 0.5 to 2 parts of bacteriostatic agent, 0.05 to 0.1 part of pH regulator and 40 to 70 parts of solvent. The fluffy softener prepared by the method can endow a fabric with an excellent soft, fluffy and elegant hand feeling style, has extremely salt-alkali-resistant and high-temperature-resistant stability performance, and has no obvious influence on the whiteness, color light and fastness of the dyed fabric.

The invention relates to the technical field of textile chemical industry, and discloses a production process for improving the waterproof function of sweaters, which comprises the following steps: mixing acrylic resin, octamethylcyclotetrasiloxane, polyvinyl alcohol, a waterproof additive, a crosslinking monomer, a surfactant, an initiator and deionized water, and stirring to obtain a fabric waterproof agent; soaking the sweater into the fabric waterproof agent, stirring, taking out, padding and drying to obtain the waterproof sweater. A fabric waterproof agent formed by acrylic resin, octamethylcyclotetrasiloxane, polyvinyl alcohol, a compound waterproof additive, a cross-linking monomer, a surfactant and an initiator forms a compact waterproof layer on the surface of a sweater, so that the sweater has better waterproof performance, and the compound waterproof agent has the effects of wetting and permeating the surface of the sweater and forming a film; the binding force of the fabric waterproof agent on the surface of a sweater is remarkably enhanced, so that the sweater has relatively high long-acting waterproof performance.

The preparation method comprises the following steps: S1, under the protection of nitrogen, mixing hexaethylcyclotrisiloxane, octamethylcyclotetrasiloxane, dimethyl dialkoxy silane and an acid catalyst, reacting, adding a weakly alkaline substance to terminate the reaction, and filtering to obtain an oligomer A; s2, adding alkoxy silane into the oligomer A, uniformly mixing, and adding a boric acid compound into the mixture for condensation reaction to obtain a polysiloxane oligomer; s3, the polysiloxane oligomer is dissolved in an organic solvent, and the low-temperature flexible primer is obtained. According to the invention, the polysiloxane oligomer containing the diethylsiloxy chain link, the siloxy group, the boron element and the like at the same time is prepared, and the interface bonding strength of the silicone rubber is improved and the low-temperature flexibility function is realized by utilizing the empty orbital effect of boron atoms, the low-temperature characteristic of the diethylsiloxy chain link and the hydrolysis reaction effect of the siloxy group. The preparation method has the advantages of cheap and easily available raw materials and mild reaction conditions.

The invention discloses a method for preparing an organic silicon polyurethane emulsion by an aqueous solution method, which comprises the following steps: S1, carrying out ring-opening chain extension reaction on 1, 1, 3, 3-tetramethyldisiloxane and octamethylcyclotetrasiloxane or dimethyl cyclosiloxane under the action of an acid catalyst to prepare hydrogen-terminated silicone oil; s2, carrying out an addition reaction on the hydrogen-terminated silicone oil and an ether substance in the presence or absence of a first organic solvent under the action of a platinum catalyst to prepare epoxy-terminated polyether silicone oil; s3, the epoxy-terminated polyether silicone oil and organic amine are subjected to a heating ammoniation reaction under the action of a second organic solvent, and amino-terminated block silicone oil is prepared; s4, emulsifying the amino-terminated block silicone oil under the action of a diluent, water and acid to prepare an amino-terminated block silicone oil emulsion; and S5, under the conditions of stirring and certain temperature, dropwise adding isocyanate into the amino-terminated block silicone oil emulsion, and reacting to obtain the organic silicon modified polyurethane emulsion.

The application discloses a preparation method of modified cerium oxide for high-toughness and ultraviolet-resistant nylon and the nylon. The preparation method comprises the following steps: S10, adding modified cerium oxide and sodium polycarboxylate into water according to a mass ratio of (9-12):1, and performing first sand grinding to obtain a first solution; S20, uniformly mixing the first solution and octamethylcyclotetrasiloxane according to a mass ratio of (8-10):1, and performing second sand grinding to obtain a second solution; S30, drying the second solution to obtain solid modified cerium oxide; and S40, crushing the solid modified cerium oxide to obtain modified cerium oxide. The sodium polycarboxylate and the octamethylcyclotetrasiloxane are used to modify the cerium oxide, so that the obtained modified cerium oxide is uniformly dispersed when used for preparing the nylon, and meanwhile, the toughness and the ultraviolet resistance of the prepared nylon are improved.

The invention discloses a preparation method of an organosilicon anticorrosive coating, and relates to the technical field of coatings. When preparing the organosilicon anticorrosive coating, the present invention first reacts heptamethylcyclotetrasiloxane, N, N-dimethylethyleneamine and 4-chloromethylphenylboronic acid pinacol ester to obtain quaternized cyclotetrasiloxane, then reacts quaternized cyclotetrasiloxane, octamethylcyclotetrasiloxane and 1,3-bis(3-aminopropyl)tetramethyldisiloxane to obtain functionalized polysiloxane; titanium dioxide nanosheets, aniline and (3-aminophenyl)phosphonic acid are reacted to obtain modified nano titanium dioxide, and finally epoxy resin, functionalized polysiloxane, xylene, modified nano titanium dioxide and polyamide curing agent are mixed to obtain the organosilicon anticorrosive coating. The organosilicon anticorrosive coating prepared by the present invention has excellent anticorrosive, self-repairing, flame retardant and antibacterial properties.

The invention relates to the technical field of textile waterproofing agents, and discloses an environment-friendly organosilicon waterproofing agent and a preparation method thereof, the environment-friendly organosilicon waterproofing agent comprises the following raw materials by mass: 40-50 parts of modified organosilicon resin, 5-10 parts of a surfactant, 3-5 parts of a cross-linking agent, 1-2 parts of a reinforcing filler, 0.5-1 part of an auxiliary agent, and 15-20 parts of deionized water. Octamethylcyclotetrasiloxane, hexadecyl trimethoxy silane, N-aminoethyl-3-aminopropyl methyl dimethoxy silane and carboxymethyl cellulose are mixed and react to form modified organic silicon resin, a long-chain alkane structure and an active functional group amino group are introduced into an organic silicon resin molecular chain, the water resistance of the organic silicon resin is improved, and the organic silicon resin has the advantages that the water resistance of the organic silicon resin is improved; active functional groups contained in the waterproof agent can be combined with fabric fibers through chemical bonds, so that the washing resistance of the organosilicon waterproof agent is improved; the reinforcing filler is compounded, so that the binding force between the waterproof agent and a fabric substrate is remarkably enhanced, and the washability, the weather resistance, the waterproof performance and the flexibility of the waterproof agent are improved.

The application belongs to the technical field of polyether organosilicon copolymer preparation, and relates to a star-shaped polyether organosilicon copolymer, a preparation method and application thereof. Dimethylcyclosiloxane and octamethylcyclotetrasiloxane are subjected to ring-opening polymerization, crosslinking with 1,5-hexadiene to prepare a hydrogen-containing polymethylsiloxane skeleton, 2,4,7,9-tetramethyl-5-decyne-4,7-diol is used as raw material, ring-opening polymerization with propylene oxide to obtain an alkyne diol ether intermediate, and then the star-shaped polyether organosilicon copolymer is prepared by the silicon-hydrogen addition of the hydrogen-containing polymethylsiloxane, which can be used as an active ingredient of a defoaming agent. Compared with linear polyether, the star-shaped branched structure diversifies the van der Waals force, hydrogen bond and other forces, can more quickly destroy the stability of the foam liquid film, and realizes rapid defoaming.

The invention discloses a mirror-polished thin ceramic rock plate and a preparation method thereof, and relates to the field of ceramics. When the mirror-polished thin ceramic rock plate is prepared, octamethylcyclotetrasiloxane, 3-dimethylaminopropyl (dimethoxy) methylsilane and vinyl pentamethyldisiloxane are subjected to a reaction, and polysiloxane is prepared; acrylic acid-2-hydroxyethyl ester and cyanuric chloride react to prepare a cross-linking agent, polysiloxane, the cross-linking agent, chloropropane and methyl iodide react to prepare a hydrophobic antibacterial coating material, the hydrophobic antibacterial coating material and a photoinitiator are evenly mixed, then the surface of a ceramic rock plate is coated with the mixture, and ultraviolet curing is conducted to prepare the hydrophobic antibacterial ceramic rock plate. The mirror-polished thin ceramic rock plate prepared by the preparation method disclosed by the invention has good antibacterial property and hydrophobic property.

The invention relates to the field of magnesia carbon bricks and discloses a novel magnesia carbon brick for a converter mouth and a preparation method thereof.The novel magnesia carbon brick for the converter mouth is prepared from, by weight, 73-80 parts of fused magnesia particles, 15-22 parts of fused magnesia fine powder, 3-5 parts of crystalline flake graphite, 4-6 parts of phenolic resin, 1-4 parts of modified carbon fibers, 0.5-3.5 parts of alpha-Al2O3 micro powder and 2-5 parts of additives; the modified carbon fiber is prepared by carrying out boron nitride coating on carbon fiber by adopting a boric acid and urea impregnation reaction process and then carrying out high-temperature carbonization and cracking by adopting phenolic resin to further carry out cracking carbon coating; the admixture is prepared by the following steps: preparing polyborosiloxane from octamethylcyclotetrasiloxane and boric acid as raw materials, preparing titanium dioxide sol from titanium tetrachloride and isopropyl ether as raw materials and dichloromethane as a solvent by adopting a non-hydrolytic sol-gel method, and then mixing the polyborosiloxane and the titanium dioxide sol. The magnesia carbon brick prepared by the method is high in overall strength and good in thermal shock resistance and oxidation resistance.

The present invention provides a method for producing an organopolysiloxane emulsion composition that has a low octamethyltetrasiloxane content, small particle size, and good long-term stability. [Solution] <Step (I)> (A) Organopolysiloxane represented by the following formula (1): 100 parts by mass HO(R 1 2SiO) n H (1)(B) Silane compound represented by the following formula (2): 0.01 to 10 parts by mass R 2 1st Round 1 (3-a) Si(OR 3 ) a (2) A method for producing an organopolysiloxane emulsion composition in which the amount of octamethylcyclotetrasiloxane is 3,000 ppm or less and the particle size of the emulsion is 1 μm or less, by emulsifying a mixture containing (C) surfactant: 1 to 8 parts by mass and (D-1) water: 1 to 10,000 parts by mass, and then emulsion polymerization is carried out at a temperature of less than 40°C in the presence of (E) an acid catalyst.

The invention discloses polysiloxane containing a silane side chain as well as a preparation method and application of the polysiloxane, 2, 4, 6, 8-tetramethyl-2, 4, 6, 8-tetravinyl cyclotetrasiloxane, octamethylcyclotetrasiloxane and the like are adopted as raw materials, and are respectively subjected to two-step reaction of ring opening polymerization and hydrosilylation under the action of strong acid and a platinum catalyst, so that the polysiloxane containing the silane side chain is obtained. And the polysiloxane containing the silane side chain is prepared. The polysiloxane containing the silane side chain is applied to liquid cooling for related performance tests, and it is verified that the polysiloxane containing the silane side chain can serve as cooling fluid to be applied to liquid cooling in the fields of data centers and energy storage batteries, so that the range of immersed cooling media is expanded. In addition, the preparation method disclosed by the invention has the characteristics of cheap and easily available raw materials, low preparation cost, simplicity and safety in operation, capability of simply and accurately regulating and controlling the molecular structure and the like, and is suitable for industrial popularization.

The invention discloses a method for low-temperature rapid catalytic degradation of silicone rubber, and belongs to the technical field of resource utilization of waste silicone rubber. According to the method, trifluoromethanesulfonic acid (HOTf) and metal halide zinc chloride are adopted to construct a concerted catalysis system, so that breakage and cyclization of a siloxane main chain can be realized within 10-20 minutes at the low temperature of 25 DEG C, and a siloxane product with octamethylcyclotetrasiloxane (D4) and cyclopentasiloxane (D5) as main components is generated. Compared with an existing Lewis acid system, the synergistic system still shows remarkably improved degradation rate and higher cyclization selectivity under a low-temperature condition. The method provided by the invention is suitable for linear, cross-linked and filler-containing waste silicone rubber, the process is mild and safe, the operation is convenient, and the obtained siloxane product can be directly used for regeneration and cyclic utilization of an organic silicon material.

This invention belongs to the technical field of organosilicon polymer compositions, specifically relating to a silicone gel composition for potting and its application in electronic component encapsulation. It is prepared from vinyl-functionalized methylphenyl silicone oil, inhibitors, crosslinking agents, chain extenders, and a platinum catalyst. Using vinyl-containing siloxanes as vinyl-introducing raw materials, and octamethylcyclotetrasiloxane and phenylcyclotetrasiloxane as basic monomers, a ring-opening polymerization reaction is catalyzed by a catalyst under a protective gas atmosphere. By controlling the gradient heating process, vinyl and phenyl groups are sequentially introduced into the side chains of the molecular chain to obtain an intermediate product. Then, vinyl end-capping is performed to obtain the vinyl-functionalized methylphenyl silicone oil. This invention introduces vinyl functional groups into both the side chains and end groups of the silicone oil, solving the problems of low functionality and insufficient crosslinking density in traditional vinyl-terminated silicone oils. It achieves a three-dimensional dense crosslinking network, significantly improving the heat aging resistance of the silicone gel and meeting the requirements of electronic-grade potting compounds.

The invention discloses plant-based water-based ink and a preparation method thereof, and relates to the field of water-based ink. When the plant-based water-based ink is prepared, microcrystalline cellulose is subjected to formylation, then is grafted with 2-mercaptoethylamine and then is bonded with nano-silver to prepare modified cellulose; the preparation method comprises the following steps: reacting octamethylcyclotetrasiloxane, 2-methyl ester ethyl dimethoxy methylsilane and pentamethyldisiloxane, and grafting hydrazine hydrate to prepare modified silicone oil; uniformly mixing poly (butylene adipate), castor oil, isophorone diisocyanate and the modified silicone oil to obtain a modified polyurethane emulsion; the preparation method comprises the following steps: reacting aminomalonic acid with 3, 5-di-tert-butyl-4-hydroxybenzaldehyde, and uniformly mixing with carbon black powder and 1, 5-dihydroxy-3-pentanone to obtain modified carbon black; uniformly mixing the modified polyurethane emulsion, the color paste, the flatting agent and the modified cellulose to obtain the plant-based water-based ink. The prepared plant-based water-based ink has excellent antistatic property, wear resistance and durability.