73 results about "Trimethylsilanol" patented technology

The invention relates to a preparation method of Trimethylsilyl trifluoromethanesulfonate, and belongs to the field of a fine chemical industry. The preparation method comprises the following specific steps: a compound of which the general formula is CF3SO2X reacts with hydroxytrimethylsilane, wherein X is Cl, F or OSO2CF3, and hydroxytrimethylsilane is used as a silicon alkylation reagent of the reaction; the reduced pressure distillation is carried out on a reaction mixture after the reaction is finished to collect Trimethylsilyl trifluoromethanesulfonate of which the mass content is higher than 99.0%, wherein the mole ratio of the CF3SO2X to the hydroxytrimethylsilane in the reaction is (1.00: 0.80) to (1.00: 1.60), the reaction time is 1 to 10 hours, the reduced pressure distillation is carried out on the reaction mixture after the reaction is finished, and the pressure is 0.005 to 0.030MPa.

A biomass composite material with high hydrophobicity and a preparation method thereof, the biomass composite material uses nano-calcium carbonate containing modified wood powder, plastic particles, toughening agent, compatibilizer, coupling agent, and hydrophobic filler The modified wood powder is first dehydrated and etherified by poly(dimethylsiloxane), trimethylsilanol and wood powder in a solvent, and then the hydroxyl groups on the surface of the wood powder are esterified Made by modified reaction. The biomass composite material provided by the invention has super-hydrophobicity, and when in contact with water, the stable contact angle of the surface is greater than 140°, water droplets cannot be immersed in the biomass composite board, the water absorption is extremely low, and the boiling resistance is excellent, so it can be used outdoors It has the advantages of anti-pollution and low water absorption, which greatly prolongs the service life of biomass composite materials outdoors.

The invention discloses an anti-seep underground pipe culvert. The anti-seep underground pipe culvert is prepared from cement, gravels, river sands, pulverized fuel ash, dicumyl peroxide, polyisobutene, ethyl carbamate, hydroxytrimethylsilane, water, an air entraining agent and water reducer. The invention further discloses a method for preparing the anti-seep underground pipe culvert. The method comprises the following steps of (1) mixing the cement, the gravels, the river sands, the pulverized fuel ash, the dicumyl peroxide, the polyisobutene, the ethyl carbamate, the hydroxytrimethylsilane, the air entraining agent and the water reducer to prepare a mixture M1; (2) pouring the mixture M1 into a reinforcement cage to form a pipe culvert blank body; and (3) maintaining the pipe culvert blank body to obtain the anti-seep underground pipe culvert. The anti-seep underground pipe culvert prepared by the method has an excellent water seepage prevention function, and has relatively high compressive strength and splitting tensile strength.

The invention discloses an efficient flame retardant siloxy fluoro-cyclotriphosphazene and a synthesis method thereof. Fluoro-cyclotriphosphazene is dissolved into an organic solvent, and a siloxy compound and a catalyst are added to perform a reaction for 0.5-72h to replace fluorine atoms by siloxy to obtain siloxy fluoro-cyclotriphosphazene, wherein the siloxy compound is potassium trimethylsilanolate, sodium trimethylsilanolate or lithium trimethylsilanolate. The adopted synthesis method is mild in reaction conditions, high in reaction controllability and capable of realizing industrial production conveniently; and in addition, the technological process is simple, the reactants and the solvent can be recycled, and the product purity and yield are relatively high.

The invention relates to the lamp heat dissipation materials and specifically relates to an aluminum-based composite heat dissipation material with low thermal impedance for an LED and a production method thereof. The heat dissipation material is prepared from the following materials in parts by weight: 76-78 parts of aluminum, 12-15 parts of aluminum nitride, 8-10 parts of titanium dioxide, 1-3 parts of strontium carbonate, 2-3 parts of sodium trimethylsilanolate, 4-5 parts of sodium polyacrylate, 1-3 parts of oil amine polyoxyethylene ether, 10-12 parts of organic silicon resin, 0.2-0.4 part of acetamide and 4-5 parts of auxiliaries. The heat dissipation material disclosed by the invention is integrated with advantages of components such as aluminum, aluminum nitride, organic silicon resin, and the like, and also has good heat-conducting property and insulating property; the materials are grinded and dispersed in mixed aqueous liquor of sodium polyacrylate and acetamide, so that compatibility of the materials is improved; the auxiliaries are added, so that sintering performance of the mixed materials is improved; the heat dissipation material is compact and ordered in internal structure, smooth and compact in surface, quick in heat transmission and heat dissipation, low in thermal impedance, and capable of quickly lowering the temperature of the LED lamps so as to guarantee the lamps to efficiently and stably light, and thus, service lives of the LED lamps are prolonged.

The invention discloses preparation of nano calcium carbonate for a siloxane end-capped polyurethane sealant, the proportion of refined lime milk is regulated to 1.060-1.080, a bubbling carbonation reaction kettle is then introduced, a CO2 mixed gas is introduced to implement the carbonation reaction, the reaction is stopped when the pH of a reaction liquid is equal to 7.0, a nano calcium carbonate suspension is obtained; the nano calcium carbonate suspension is heated to 75-85 DEG C, a surface treating agent compounded from hydroxytrimethylsilane, dimethylformamide and fatty acid salt is added, the addition quantity of the surface treating agent is 4.0-5.0% of the mass of a calcium carbonate dry basis in the suspension, the surface modifying is finished after stirring for 30-60 minutes, amodified calcium carbonate suspension is obtained; the modified calcium carbonate suspension is filter-pressed, dehydrated, dried and pulverized to obtain a nano calcium carbonate product. After thecalcium carbonate prepared through the method fills SPU (siloxane end-capped polyurethane), the problem of dispersity of calcium carbonate in the SPU sealant is solved, and the elongation at break andthe storage stability of the SPU sealant are also obviously improved.

The invention discloses a preparation method of a polymer for packaging a large-scale integrated circuit. The polymer comprises the main raw material of 95-65 parts by mass of alpha,omega-dihydroxyl polydimethylsiloxane or alpha,omega-hydroxyl poly(dimethyl-methylvinyl)silica with the polymerization degree of 5-30 and comprises the auxiliary raw material of 5-35 parts by mass of methylvinyl MQ silicon resin or methyl MQ silicon resin with the M/Q value of 0.6-0.9. The preparation method comprises the following steps: feeding the main raw material and the auxiliary raw material into a reaction kettle, and stirring for 20-60 minutes at a speed of 40-120 rpm; heating to 50-130 DEG C at a speed of 2 DEG C per minute; after the system is uniformly mixed and the temperature is stable, stirring at constant temperature for 1-4 hours in the presence of a catalyst, namely sodium trimethylsilanolate or potassium trimethylsilanolate accounting for 0.01%-0.1% of the mass parts of the main raw material; after the reactant turns into transparent colloid, stopping heating and continuously stirring until the reactant is cooled to room temperature to obtain the target product. The body resistance is higher than 1,013omega, the thermal conductivity is lower than 1.40W/mK, and the polymer can tolerate irradiation not lower than 109rad while good elasticity is still kept.

The invention discloses a perlite heat preservation board and a preparation method thereof. The heat preservation board comprises the following raw materials: modified expanded perlite, kaolin, cement, plant ash, diatomaceous earth, sodium trimethylsilanolate, epoxy chloropropane, divinyl benzene, ethyl orthosilicate, N,N'-methylene bisacrylamide, calcium sulphate, sodium chloroacetate, sodium chloride, sodium silicate and water; and the preparation method includes the following steps: uniformly mixing the modified expanded perlite, the kaolin, the cement, the plant ash and the diatomaceous earth to obtain a mixture A; uniformly mixing the remaining raw materials, adding water, and performing stirring to obtain a solution B; and adding the solution B into the mixture A, performing uniformstirring, pouring the stirred solution into a mold, performing compression moulding to obtain a perlite heat preservation board blank body, performing primary drying, performing secondary drying, andperforming tertiary drying to obtain the perlite heat preservation board. The perlite heat preservation board provided by the invention has good heat preservation performance, high compressive strength, is not easy to damage, and has high durability.

The invention discloses a preparation method of trimethylsilanol. The preparation method includes the following steps of: S1, adding hexamethyldisilazane and phosphoric acid into a reaction kettle while stirring, wherein the molar ratio of the hexamethyldisilazane to the phosphoric acid is 1:(1 to 3); S2, after a period of heat-insulated reaction, performing stirring and rinsing by a solvent; S3,after standing and layering, performing separation to obtain the trimethylsilanol. The preparation method has the advantages that the method is used for preparing the trimethylsilanol, the process issimple in the production process, the process of a rectification stage is omitted in the washing procedure, the energy consumption is reduced, and the problem that the solvent is difficult to completely separate in the system is solved, so that the purity of a washed product can reach 99.6%, and the yield thereof can reach 92.8%; the subsequent separation is simple, reaction by-products, namely phosphoric acid aqueous solutions in which salt is dissolved, are few and can be recycled and reused, and the production cost is reduced.

The invention discloses a chloroprene rubber-based pressure sensitive tape, which comprises the following components by weight ratio: 32-39 parts of chloroprene rubber, 17-22 parts of butadiene, 5-9 parts of polyvinyl methyl ether, 2-4 parts of diethylenetriamines, 6-10 parts of acrylonitrile, 4-7 parts of glyoxal and 5-6 parts of hydroxytrimethylsilane. A preparation method of the chloroprene rubber-based pressure sensitive tape comprises the following steps: 1)taking chloroprene rubber and butadiene, uniformly mixing chloroprene rubber and butadiene with stirring to obtain a mixture; 2)adding the mixture obtained in the step 1) in a mixing roll from a feed inlet, adding polyvinyl methyl ether, diethylenetriamines and acrylonitrile for mixing in the mixing roll from the feed inlet; 3)adding glyoxal and hydroxytrimethylsilane in the mixing roll and then mixing; and 4)cutting a chloroprene rubber-based pressure sensitive adhesive to obtain the pressure sensitive tape.

The invention discloses a preparation method of trimethylsilanol. The preparation method is characterized by specifically comprising the following steps: S1, selecting raw materials: selecting, by weight for later use: 450-550 parts of hexamethyldisilazane, 45-55 parts of glacial acetic acid and 90-110 parts of water; S2, mixing: adding water and glacial acetic acid into a 1000 ml four-necked bottle, mixing, uniformly stirring, and then heating the mixed solution to 60-70 DEG C; S3, reacting: dropwise adding hexamethyldisilazane into the mixed solution obtained in step S2, and reacting for 2-3hours; and S4, rectifying: distilling a solution obtained in step S3 to obtain trimethylsilanol with the purity of 98% or above. The preparation method of the trimethylsilanol has the advantages of simple raw materials, short manufacturing process, less production waste and the like.

An improved concrete pumping agent is prepared from the following raw materials in parts by weight: 6-10 parts of aluminium sesquioxide, 3-9 parts of calcium lignosulphonate, 5-11 parts of hydroxypropyl starch ether, 5-8 parts of methyl cellulose, 2-7 parts of ammonium carbonate, 2-5 parts of an amine cosolvent, 6-9 parts of sodium alkylbenzenesulfonate, 7-11 parts of perfluorooctyl triethoxysilane, 2-4 parts of sulfur trioxide, 4-10 parts of nano silica, 4-10 parts of sodium trimethyl silanol, 1-5 parts of p-hydroxy N,N-dimethylcyclohexylamine, 3-8 parts of diethanol amine, 40 parts of water and 5-8 parts of silica powder. The improved concrete pumping agent has the benefits of being stable in performance, high in temperature applicability, wide in application range, and high in water reducing rate.

The invention discloses an environmental-friendly waterborne polyurethane coating and relates to the technical field of waterborne coatings. The environmental-friendly waterborne polyurethane coatingis prepared from the following components: tetrasilanol sodium salt modified polyurethane emulsion, nano calcium carbonate, diatom ooze, hollow glass beads, potassium trimethylsilanolate, vinyl versatate, inorganic salt powder, a wetting agent, an antifoaming agent, a dispersing agent and a thickening agent. The environmental-friendly waterborne polyurethane coating prepared from the invention hasexcellent scrubbing resistance, stain resistance and artificial aging resistance.