61 results about "Silica gel" patented technology

A chewing spirulina tablet is prepared from spirulina and two or more of dextrin, microcrystalline cellulose, mannitol, xylitol, aspartame, glycyrrhizin, essence powder, superfine silica gel powder, and magnesium stearate through mixing, granulating by use of alcohol solution containing polyvitone K30, drying and die pressing.

The invention relates to a periodic structure which is based on the local resonance band gap characteristic and has the low-frequency vibration suppression performance, and belongs to the technical field of aviation, aerospace and ship vibration noise control. The periodic structure comprises mass components, elastic components and a base body, and the mass components and the elastic components are periodically distributed. A periodic unit comprises metal structures, namely, the mass components. The side surface of each mass component is surrounded by a circle of rubber or silicone annular structure, namely, the corresponding elastic component. The side surface of the circumference of each mass component is a curved surface with a certain shape. Each elastic component is attached to the corresponding mass component and then surrounds the mass component to serve as a whole period to be arranged in the elastic structure base body. The elastic components are also attached to the base body. The periodic structure has the obvious band gap characteristic. The periodic structure based on the local resonance band gap characteristic has the good low-frequency vibration suppression performance.

The invention discloses a process for pressing galvanized PCB boards. The process comprises the following steps of: the first pressing step, after sequentially covering a bonding sheet, a copper foil and an elastic pad on a core board assembly to be pressed, pressing the core board assembly under the high-temperature and high-pressure condition, and pressing the bonding sheet into grooves among copper foil lines on the surface of the core board assembly; the copper removing step, after detaching the silica gel pad, removing the overlaid copper foil to expose the cured bonding sheet; and the second pressing step, after covering another bonding sheet on the semi-finished product of which an insulating sheet is removed, pressing the bonding sheet and the core board assembly to be pressed with the bonding sheet under the high-temperature and high-pressure condition. The invention also discloses a corresponding multi-layer PCB board. The invention can effectively prevent the gel shortage problem due to the excessive thickness of inner-layer copper foil lines after pressing and various quality problems caused by gel shortage, and avoids the waste of processing resources in subsequent procedures as a result of gel shortage.

The invention provides a loaded metallocene catalyst, which comprises a carrier, and a metallocene compound and alkylaluminoxane loaded on the carrier, wherein the carrier is a compound of silica gel and bar-shaped SBA-15; and the metallocene compound has a structure shown as a formula I. The invention further provides a method for preparing the loaded metallocene catalyst. The method comprises the following step of: under the protection of an inert gas, loading alkylaluminoxane and a metallocene compound on the carrier one by one. In the loaded metallocene catalyst according to the invention, the compound of the industrial silica gel and the bar-shaped SBA-15 is taken as the carrier, so that the cost of the catalyst is lowered remarkably. The loaded metallocene catalyst according to the invention displays high catalytic efficiency when used for catalyzing homopolymerization of olefins and copolymerization of the olefins.

The present invention discloses a method for preparing a silica sol modified azodicarbonamide foaming agent, and belongs to the field of preparation of foaming agents. According to the method, methyltrimethoxysilane and sodium dodecyl benzene sulfonate are mixed for preparation of a modified silane solution, then ammonia water is dropwise added into the modified silane solution for preparation of silica hydrosol, by mutual dispersion of the silica hydrosol and azodicarbonamide, the azodicarbonamide is fully mixed by silica, and the purposes of not easy agglomeration and moisture absorption of the prepared foaming agent can be achieved. The beneficial effects are that: the preparation method is simple, after the prepared product is mixed with a liquid or a paste-like polymer, the product is not easy to agglomerate; when the foaming agent is used in foaming, particles are dispersed uniformly, the product surface is smooth and free of pocking marks, and the use effect is good.

The invention relates to an increasing insole with massage convex points. The increasing insole with the massage convex points comprises an insole body (1). The insole body (1) is made of silica gel. The increasing insole with the massage convex points is characterized in that the insole body (1) is provided with a plurality of vent holes (2), and the two side faces of each vent hole (2) are communicated; the upper surface of the insole body (1) is provided with the massage convex points (3); the insole body (1) comprises a pure cotton surface layer, an activated carbon middle layer and a PU bottom layer. Since the insole body is provided with the vent holes and the massage convex points, the foot of a user can feel comfortable, the breathable effect is good, no odor will be generated after the insole is used for a long time, and the increasing insole is not prone to slipping.

The invention provides photochromic microcapsule and hybrid modified silica sol coated fabric and a preparation method thereof, relates to coated fabric and a preparation method thereof and aims to solve the problems that textiles are poor in rubbing fastness and washing fastness, poor in photochemical color fastness to sunlight and short in service life and touch hard when the conventional photochromic microcapsules are directly applied to dye uptake or printing of the coated fabric. The photochromic microcapsule and hybrid modified silica sol coated fabric is prepared from hydrophobically modified silica sol and a photochromic microcapsule. The preparation method comprises the following steps: the photochromic microcapsule is added to a container, then the hydrophobically modified silicasol is added, stirring reaction is performed, and the photochromic microcapsule and hybrid modified silica sol coated fabric is obtained. The fabric has the advantages that water repellency can be realized and a photochromic functional effect can be realized. The invention mainly applies to preparation of the photochromic microcapsule and hybrid modified silica sol coated fabric.

The invention provides a hand held device for removing loose hair strands from at least one of a pet and a fabric which includes a handle member, a hair removal member having a material from a group consisting of natural rubber, synthetic rubber, vinyl, gum and silicone and adhesive for attaching said hair removal member to said handle member. The invention further provides an accessory for a conventional power operated tool or a vacuum cleaner which is usable for removing loose hair strands.

The invention relates to the technical field of cosmetics, and particularly discloses a velvet lipstick and a preparation method thereof. The lipstick is prepared from the following raw materials in parts by weight: 20-30 parts of grease, 15-20 parts of wax, 10-15 parts of ester, 1-5 parts of a film-forming agent, 1-3 parts of a coloring agent and 2-5 parts of a rice extract, wherein the film-forming agent is one or a composition of more of organic silicon resin, a silica gel mixture and silicon dioxide; and the rice extract is a composition of a rice germ extract and a rice extract. The preparation method of the velvet lipstick comprises the following steps: heating and grinding the grease and the ester, adding the film-forming agent, and continuing grinding to obtain a mixed phase A; stirring the wax after anaerobic heating, adding the coloring agent, conducting grinding and mixing, lowering the temperature to 60-70 DEG C, and adding the rice extract to obtain a mixed phase B; and mixing the mixed phase A and the mixed phase B at the temperature of 60-70 DEG C, carrying out oxygen-free heat preservation for 1 h, and naturally cooling the mixture to room temperature to obtain the lipstick. The lipstick disclosed by the invention can be used for decorating the lip skin of a human body and is excellent in texture.

The invention discloses a preparing method of graphene luminous cutting-prevention flame-retardant firefighting gloves. The gloves are woven through one or more of aramid fiber 1414/graphene chinlon core-spun yarn, stainless steel wire/ aramid fiber 1414 coating yarn, luminous-green dacron DTY yarn, spandex-coated nylon dyed yarn and shirr; the woven gloves are impregnated through high-temperature-resistance and environment-friendly silica gel to obtain a finished product. The preparing technology is simple, the gloves can be produced on a large scale, and are high in cutting resistance, conductivity, flame retardance, static resistance, bacterial resistance, cutting resistance, fire resistance, skid resistance, and wearproof performance, and are comfortable and convenient to wear. The preparing method can be widely applied to special industries like equipment manufacturing and firefighting.

The invention discloses a chemical industry mechanical stirrer based on paddle wing barbs for organic silica gel. The chemical industry mechanical stirrer structurally comprises a gear box, a shaft driving motor, a conveying wheel belt, a cover balancing weight, a propeller stirring tank groove, a hydraulic cylinder rod and a material loading cylinder groove. According to the invention, the propeller stirring tank groove is matched with the material loading cylinder groove, so that the hook end block and the barb corn bending plate are matched to work to form linear rotary wire drawing; by matching with the twisting and hinging operation of the propeller, the granular sensation and the forming quality of the whole treated organic silica gel are high, the whole small fragments are uniform,the effect of rotary wire drawing is achieved, centripetal force operation is diffused, and the rotary floating action effect of the wire edge is formed; and the annular cutting effect is achieved through the bent knife supporting rod frame on the edge, so that the sealed rotary work of the isolation cover at the cap end of the axis rod is also guaranteed, the work rotary stirring efficiency is continuously guaranteed, the smooth annular track machining effect of chemical industry machinery is driven, and the high-performance machining effect of bottom loss is achieved along the inner tank barrel structure.

The invention discloses an improved structure of a hydraulic oil pipe of a transformer, which comprises a gas pipe body connected to an oil conservator, and a gas-permeable dust-absorbing layer, a metal gas-permeable adsorption layer, and a silica gel water-absorbing layer are arranged in the gas pipe body. The air-permeable adsorption layer and the silica gel water-absorbing layer are sequentially arranged along the axial direction of the trachea body towards the direction of the oil conservator, and the air-permeable dust-absorbing layer is formed by soaking and drying the air-permeable board in diglycolamine solution. The invention realizes the purpose of an oil conservator gas pipe that can reduce the pollution probability of transformer oil by dust, metal elements and sulfide in the air and improve the purification degree of the air entering the oil conservator.

The invention discloses method and device for determining radioactive intensity of methane. The method comprises the steps of: A, oxidizing a methane sample, marked with C-14, with O2 into CO2 through high-temperature silica gel immobilized with cobalt chloride in a sealed condition, then continuing to import oxygen; B, absorbing CO2 in gas generated by the oxidation with an alkaline scintillation solution after the CO2 is condensed and purified; and C, uniformly shaking an absorption liquid, and directly measuring the C-14 radioactive intensity of a mixed liquid with a liquid scintiloscope. The invention further discloses a device for determining radioactive intensity of C-14 marked methane, wherein an injector is connected with a controllable L-shaped needle head, the injector and the controllable L-shaped needle head are inserted into a high-temperature resistant quartz tube after passing through a high-temperature resistant rubber stopper, an oxygen tube is inserted into the high-temperature resistant quartz tube, the high-temperature resistant quartz tube is threaded through a tubular muffle furnace, and the high-temperature resistant quartz tube and the high-temperature resistant rubber stopper are connected with a condenser, a buffer tube and the L-shaped needle head through glass tubes in sequence. The method and the device have the characteristics of fast and convenient operation and high accuracy, and are suitable for the analysis of the radioactive intensity of C-14 marked methane and the determination of a sample with less C-14 content.

The invention discloses an LED packaging structure and packaging method thereof. The LED packaging structure comprises a square bracket, wherein an LED chip is arranged at the center of the bowl cup of the bracket; the electrodes of the LED chip are connected with the positive and negative electrodes of the bracket by golden lines; a step is arranged on the bowl cup wall of the bracket; glue filling holes are formed in the four corner of the step; each glue filling hole is communicated to the bottom of the bowl cup; a glass sheet is arranged on the step; one surface of the glass sheet is coated with fluorescent powder; the surface, coated with the fluorescent powder, of the glass sheet faces downwards. The LED packaging structure and the packaging method thereof can be used for not only solving a problem of a yellow ring of white light of an LED, but also solving a problem of luminance decay of the white light of the LED; silica gel is injected into the bowl cup of the bracket by the glue filling holes, the operation is convenient, and the fluorescent powder can not be concentrated near to the LED chip or the bottom of the bowl cup of the bracket, and therefore, the luminance decay of the LED chip, caused by long-time heating, is avoided, and from another point of view, the service life of the LED is prolonged.

The invention discloses a silica gel oven, which comprises a box body, a door, a door, and an inner isolation board. A door is provided on one side of the box body, the door cover is buckled on the outside of the door on the side of the box body, and the inside of the door is clipped The inner isolation board seals the doorway through the inner isolation board and the door. The utility model has the advantages of simple structural design, convenient manufacture, convenient use, double-layer airtightness, high airtight effect, and reduced pollution.

The invention provides a method for detecting polymer impurities in a cefadroxil bulk drug or a preparation thereof, which is based on reversed-phase high-performance liquid chromatography. The method comprises the following steps that chromatographic conditions are established, and a polymer impurity positioning control solution is prepared, wherein the chromatographic conditions are as follows, a stationary phase is octadecyl silane bonded silica gel, a mobile phase is 0.02 mol/L monopotassium phosphate solution with the pH value of 4.8-5.2 as a mobile phase A, methanol is taken as a mobile phase B, and gradient elution is performed; the flow rate is 0.9 to 1.1 ml/min; the column temperature is 28-32 DEG C; the detection wavelength is 220nm. According to the method for detecting the polymer impurities in the cefadroxil bulk drug or the preparation of the cefadroxil bulk drug, multiple polymer impurities can be detected at the same time, the separation degree of all the polymer impurities is good, and the method can eliminate interference of small molecule impurities in the cefadroxil bulk drug or the preparation of the cefadroxil bulk drug.

The invention provides a method for separating all-trans fatty acid with antitumor activity from antarctic krill oil. According to the method, the antarctic krill oil is subjected to silica-gel chromatography coupling, high-performance liquid chromatography is prepared to carry out separation and purification, antitumor activity detection is carried out in an assisting manner so as to determine effective ingredients, molecular weights, structural compositions and configurations of the effective ingredients are determined separately through high-resolution electro-spraying ionization mass spectrum, nuclear magnetic resonance and a laser Raman scattered spectrum, and the effective ingredients are identified as all-trans EPA and all-trans DHA. Discovered by comparison of median lethal concentration of antarctic krill, commercially-available deep-sea fish oil and Amur sturgeon fish liver EPA and DHA to a variety of tumor cells, the all-trans EPA and all-trans DHA originated from the antarctic krill oil have a good tumor cell growth resisting action and are free of obvious inhibiting effect on normal control cells, thereby having a potential antitumor candidate drug development prospect.

The invention provides a method for extracting ethyl vanillate from peony. According to the method, peony petals are used as a raw material. Through heating reflux, an active component containing ethyl vanillate are extracted from peony petals; and through extraction, macroporous resin column chromatography, silica gel column chromatography and recrystallization, ethyl vanillate is obtained. By the method for extracting ethyl vanillate from peony, ethyl vanillate with high purity can be obtained, and the purity can reach 95% and above. During the extraction process of ethyl vanillate, medicines used in the process are all common medicines, and production cost is low. Meanwhile, organic solvents such as ethanol and macroporous resin in the chromatographic column can be repeatedly used. Thus, the environment is not polluted, and production cost is further reduced. The method of the invention is suitable for large-scale promotion and application. The ethyl vanillate obtained by the method has stronger activity than orlistat and can be applied in preparation of diet pills or a medicine with inhibitory effect on lipase activity.

The invention discloses a microelectronic efficient heat dissipation device. The device comprises a heat dissipation plate, wherein the heat dissipation plate is adhered to a heating surface of a chipthrough silica gel, the heat dissipation plate is of a hollow structure, and a circulating pump is arranged in an inner cavity of the heat dissipation plate; a first cooling liquid circulation channel which is arranged on the lower wall of the inner cavity; a second cooling liquid circulation channel which is arranged on the upper wall of the inner cavity; a third cooling liquid circulation channel which is arranged between the first cooling liquid circulation channel and the second cooling liquid circulation channel, and the third cooling liquid circulation channel is respectively communicated with the first cooling liquid circulation channel and the second cooling liquid circulation channel through a cooling liquid communication channel; a powder releaser which is arranged in the circulating pump; and a first temperature sensor which is arranged in the circulating pump. By using the device, the volume occupied by the heat dissipation device can be effectively reduced, the heat dissipation plate is comprehensively attached to the heating surface of the chip, and dust can be effectively prevented from making contact with silica gel.