566 results about "Silicone Gels" patented technology

The invention discloses one-step solvent-free methyl phenyl-terminated vinyl polysiloxane and silica gel, and the methyl phenyl-terminated vinyl polysiloxane is prepared by the following steps: adding octamethylcyclotetrasiloxane, octaphenylcyclotetrasiloxane and dimethyl-terminated vinyl silicone oil into a reaction container, and uniformly stirring; vacuumizing the reaction container, and introducing nitrogen to form an oxygen-free environment; heating the reaction container to 180-200 DEG C step by step, and adding a catalyst at 50-80 DEG C; the step-by-step heating comprises a first-stage pre-polymerization reaction at the temperature of 90 DEG C or below and a second-stage polymerization reaction at the temperature of 90 DEG C or above, and methyl phenyl vinyl-terminated polysiloxane is prepared. The high-temperature-resistant and high-pressure-resistant methyl phenyl silica gel is obtained by mixing methyl phenyl vinyl-terminated polysiloxane with an inhibitor, a cross-linking agent and a cross-linking catalyst, degassing, heating, cross-linking and curing, the performance requirements of high-power semiconductor devices on high-pressure resistance, high-temperature resistance and the like of packaging materials can be met, the product quality is stable, and the production efficiency is high.

The invention relates to a preparation method of a flexible solid hydrogen storage bed body, which comprises the following steps: S1, mixing 74-90% by mass of hydrogen storage alloy powder and 3-16% by mass of carbon-based heat conduction material for 20-50 minutes in a mechanical stirring manner to obtain a dry powder mixture; s2, adding an organic silicon material with the mass fraction of 5-16%, and continuously mechanically stirring for 1-5 hours to obtain a non-dry powder mixture; and S3, carrying out vacuum drying on the non-dry powder mixture in the S2 at 60-100 DEG C for 8-20 hours, and naturally cooling to room temperature to obtain the required novel non-dry powdery hydrogen storage bed body. Through the synergistic effect of the hydrogen storage alloy, the expanded graphite and the double-liquid silica gel, the flexible solid hydrogen storage material is formed on the basis of optimizing the material ratio and the process sequence. The synergistic effect of the materials breaks through the defect that a traditional hydrogen storage bed body is too high in rigidity or in a loose powder state, and finally the hydrogen storage bed body has high hydrogen storage efficiency, stable cycle life and excellent safety performance.

A prosthesis can include a shell and a needle guard coupled to a posterior portion of the shell. The shell can include a laminate having a base layer, a top layer, and a soft silicone gel intermediate layer disposed between the base layer and the top layer and of sufficient thickness for self-sealing of a needle hole therethrough. The needle guard can include a plurality of offset layers of offset, puncture-resistance structures that, in an expanded state, (i) collectively form a concave shape and (ii) provide a concave exterior surface along the posterior portion of the prosthesis for approximating a human anatomical feature. The needle guard can have a shape memory characteristic for urging the prosthesis toward the expanded state.

The invention relates to the technical field of heat-conducting interface materials, and particularly discloses high-heat-conductivity organic silicon gel and a preparation method thereof. The high-thermal-conductivity organic silicon gel is prepared from the following components in parts by weight: 100 parts of insulating and thermal-conducting filler, 0.1 to 0.3 part of poly-alpha-olefin, 0.3 to 5 parts of vinyl silicone oil, 0.03 to 1 part of hydrogen-containing silicone oil, 0.01 to 0.3 part of alkynol modified silicone oil, 0.01 to 0.5 part of catalyst and 0 to 2 parts of additive, the viscosity of the poly-alpha olefin at 100 DEG C is 1-40 mm < 2 > / s, and the viscosity index is 80-175. According to the high-thermal-conductivity organic silicon gel provided by the invention, by adopting a mode of adding a small amount of poly-alpha-olefin, the problem that the insulating thermal-conductivity filler is high in filling amount and easy to agglomerate is solved, and the obtained organic silicon gel has a high thermal conductivity coefficient of 5-8W / m.K and breakdown strength of greater than 18kV / mm.

The invention relates to the technical field of powder metallurgy, and particularly discloses an ultra-coarse grain WC-Co hard alloy and a preparation method thereof.The preparation method comprises the following steps that S1, the following raw materials including, by weight, 4.6-9.2 parts of cobalt powder, 96-102 parts of coarse grain tungsten carbide powder, 3.6-5.2 parts of functional gel, 3.4-4.6 parts of modified penetration enhancer, 2.2-2.8 parts of binder and 36-62 parts of organic solvent are prepared; step S2, preparation of a mixture; step S3, carrying out granulation treatment; step S4, compacting; step S5, pressurizing and sintering; the functional gel and the modified penetration enhancer are added, the functional gel contains yttrium oxide, polytannic acid, ultrafine tungsten carbide, tantalum carbide, chromium carbide, silica gel and other components, and the functional gel not only has excellent physical properties, but also can be cross-linked with the modified penetration enhancer to form a more compact silicon dioxide network structure; and the hardness, toughness, impact resistance and wear resistance of the alloy are improved.

The invention provides a silicone hydrogel contact lens and a preparation method thereof, and relates to the technical field of silicone-containing gel materials. The preparation method comprises the following steps: mixing hyaluronic acid and 2, 3-epoxypropyltrimethylammonium chloride for preliminary modification, and then adding glycidyl methacrylate for modification to obtain modified hyaluronic acid; mixing a siloxane monomer, 2-hydroxyethyl methacrylate, 1-vinyl-2-pyrrolidone, an acrylamide compound, the modified hyaluronic acid, a cross-linking agent, an initiator and a solvent, and polymerizing to obtain a prepolymer; injecting the prepolymer subjected to defoaming treatment into a mold, and curing to obtain a lens; and sequentially soaking the lens with an alkali solution and water to obtain the silicone hydrogel contact lens. The silicone hydrogel contact lens has relatively good hydrophilic and water-retaining performance and relatively low protein adsorption performance, the wearing comfort and the durability of the lens are improved, and the service life of the silicone hydrogel contact lens is prolonged.

The invention discloses a preparation method and application of a double-layer sound transmission type berberine-loaded gelatin microsphere slow-release antibacterial gel dressing, and belongs to the technical field of gel dressings. The preparation method comprises the following steps: taking vinyl silicone oil and silicon dioxide as raw materials, preparing upper-layer silica gel by adopting a double-component uniform mixing method, and then laminating the upper-layer silica gel and lower-layer berberine-loaded gelatin microsphere hydrogel by adopting a self-laminating method, thereby obtaining the double-layer sound-transmission type berberine-loaded gelatin microsphere slow-release antibacterial gel dressing. By means of the broad-spectrum antibacterial function of berberine, the efficient drug loading function and slow drug release function of gelatin microspheres, the sound transmission and swelling functions of lower hydrogel and the supporting function of upper hydrogel, ultrasonic inspection is conducted through a dressing covering layer, an ultrasonic scanning supporting plane is provided, ultrasonic waves penetrate through the dressing, good imaging is formed, and the application prospect is wide. And antibacterial and repairing effects on local wounds are realized at the same time.

A thermally conductive silicone composition that has high thermal conductivity and excellent workability and misalignment resistance, and contains, in specific ratios:a silicone gel cross-linked product (A);a silicone oil (B) not containing either aliphatic unsaturated bonds or SiH groups and being used as a surface treatment agent for components (C) and (D);an aluminum powder (C) including (C-1)-(C-3),(C-1) being an aluminum powder having an average particle diameter of 40-100 μm,(C-2) being an aluminum powder having an average particle diameter of at least 6 μm and less than 40 μm, and(C-3) being an aluminum powder having an average particle diameter of at least 0.4 μm and less than 6 μm;a zinc oxide powder (D) having an average particle diameter of 0.1-10 μm; anda volatile solvent (E).

The invention discloses a composite material based on liquid metal / diamond hybrid particles, a preparation method and application, and the preparation method comprises the following steps: step 1, mixing liquid metal and diamond particles, and fully grinding to obtain the liquid metal / diamond hybrid particles; step 2, adding an additive into the base silicone oil, and fully mixing to obtain a silica gel precursor; and 3, stirring and mixing the liquid metal / diamond hybrid particles obtained in the step 1 and the silica gel precursor obtained in the step 2, and curing and forming to obtain the required composite material. The composite material obtained by the invention has high heat-conducting property, high processability and reliable and stable insulating property.

The invention discloses concrete cured by CO2 and a preparation method of the concrete, and belongs to the technical field of building materials. The concrete comprises the following components in parts by weight: 350-500 parts of a cementing material; 50 to 200 parts of a CO2 load substance; 600 to 800 parts of fine aggregate; 700 to 1000 parts of coarse aggregate; 5-20 parts of a polycarboxylate superplasticizer; and 130 to 170 parts of water. According to the invention, the CO2 load with a double-layer phase change structure is utilized to realize the controlled release of CO2 in stages, the gradually slowly released CO2 and the cementing material are subjected to mineralization reaction to form carbonized products, namely calcium carbonate and silica gel, so that the densification of a matrix is promoted, and the strength, hardness and durability are further improved; the slow-release CO2 curing reduces the energy consumption caused by autoclaved curing of the concrete, greatly shortens the curing time, reduces the production cost and improves the production efficiency.

The invention discloses a window plate and a microscopic imaging system. The window sheet comprises a transparent slide and an immersion medium, the immersion medium is arranged on one side, far away from a sample to be observed, of the transparent slide, and the immersion medium is made of silica gel. The window sheet is arranged in the microscopic imaging system provided by the invention, and the silica gel which is matched with the refractive index of the biological tissue and is in a non-fluid state is adopted as an immersion medium in the window sheet, so that the window sheet can be suitable for in-vivo examination, and a very good in-vivo imaging effect and product use experience are obtained.

The invention provides an organic silica gel mechanical design method based on a load spectrum. The organic silica gel mechanical design method comprises the following steps that 1, a mechanical parameter library of impact resistance is constructed, and the value range of corresponding mechanical parameters is determined; 2, constructing a material formula set of the organic silicon gel, and determining formula main control parameters influencing the performance parameters of the organic silicon gel and the value range of the formula main control parameters; 3, constructing a corresponding performance parameter library of the organosilicone gel, and determining the value range of key performance parameters; 4, constructing a design variable and mapping relation model of'load environment-material formula-mechanical parameter-performance parameter 'of the organosilicone gel; and 5, constructing an objective function of the impact resistance mechanical optimization design of the organic silicon gel, and carrying out multi-objective optimization solution and validity verification of the objective function. According to the method, the optimal design of the shock resistance of the organic silicon gel can be quickly realized, so that the high matching with the actual shock load environment of the organic silicon gel is realized.

The invention belongs to the technical field of silicon dioxide materials, and relates to a preparation method of medicinal silicon dioxide by a gel method, which comprises the following steps: S1, filtering water glass by an inorganic treating agent, treating the filtered water glass by multiple layers of cation exchange resin to obtain a water glass solution, and treating a sulfuric acid solution by multiple layers of cation exchange resin; s2, firstly adding the water glass solution in the step S1, and then adding the sulfuric acid solution treated in the step S1 to form silica sol; s3, adding sulfuric acid on the basis of the silica sol formed in the step S2, adjusting the pH value to be acidic, stirring, adding a water glass solution, adjusting the pH value to be alkaline, heating and boosting for aging, adjusting the pH value to be acidic, and aging to form silica gel; and S4, washing the silica gel, and performing two-stage spray drying and screening to obtain the silica gel. Compared with related silica products for Grace medicine, the gel forensic medicinal silica synthesized by the invention has the advantages of better heavy metal content, dioxin control and particle size uniformity and lower impurity content, and can be better applied to the field of medicine.

The known dog boots and coats lack in the area of “easy to put on” and “stays on”. The present invention relates to a boot, including: a fabric material; a silicone gel material for covering the inner surface of the fabric material, the silicone gel material being connected to the fabric material; wherein the boot is configured to be reversible so as to cover and conform to a paw and lower leg of the domestic animal that comes in contact with the silicone gel material while the boot is put on; and wherein the silicone material and fabric material are configured to flexibly and removably secure, through the flexibility of the fabric and silicone materials, the boot to the paw and lower leg of the domestic animal; and wherein the silicone gel material provides shock-absorbing protection to the paw. The coat includes a portion with three layer fabric / silicone / fabric.

The invention discloses a preparation method of heat-conducting silica gel for packaging a power module chip, which comprises the following steps of: optimizing diamond micro-powder filling, surface etching and particle size compounding, so that the heat conductivity coefficient of the prepared heat-conducting silica gel can reach 3.8-4.5 W / (m.K) which is far higher than that of common silica gel (generally less than or equal to 3.0 W / (m.K)); meanwhile, the specific surface area of the diamond and the interface bonding force between the diamond and silica gel are improved through surface etching, the interface thermal resistance is reduced, a more efficient heat conduction path is formed, the packing stacking density is maximized through particle size compounding, air gaps are reduced, and a more stable and communicated heat conduction network is constructed; the SiC device is high in power density and high in switching speed, and the chip junction temperature is the key to restrict performance and reliability. The material can quickly and uniformly transfer heat of a chip to a heat dissipation substrate, obviously reduce junction temperature and temperature gradient in a module, and improve power density and long-term reliability.

The scar removing cream is prepared from the following raw materials in percentage by weight: 30 to 80 percent of silica gel component, 5 to 30 percent of solvent, 0.1 to 10 percent of emulsifying agent, 1 to 5 percent of thickening agent, 0.01 to 10 percent of extract / synergistic component, 0.1 to 20 percent of medicament component, 1 to 50 percent of moisturizing component, 0.01 to 0.1 percent of growth factor, 0.1 to 2 percent of other component, 0.01 to 0.5 percent of preservative and 0.1 to 2 percent of pH (Potential of Hydrogen) regulator. The traditional Chinese medicine composition has the effects of improving skin repair, whitening and diminishing inflammation, accelerates skin elasticity recovery and reduces scars.

The invention discloses a discrete device packaging structure based on direct lead bonding, which belongs to the technical field of semiconductor device packaging and comprises a power semiconductor chip, a drain metal substrate, a grid lead terminal, a drain lead terminal, a bonding wire and a supporting shell. The drain electrode metal substrate is connected with the lower surface of the power semiconductor chip through solder. The gate metal electrode on the upper surface of the power semiconductor chip is connected with the gate lead terminal through a bonding wire, and the source metal electrode on the upper surface of the power semiconductor chip is connected with the source lead terminal through solder. The interior of the supporting shell is filled with silica gel or an injection molding process, and the supporting shell covers the power semiconductor chip to serve as an insulating medium. The power density of the device is improved, the parasitic parameter of the whole device is reduced, and the reliability of the interconnection structure is improved.

The invention discloses a preparation method of polylactic acid fibers for medical and sanitary materials, and relates to the technical field of polylactic acid fibers. Nano-crystalline cellulose, nano-graphite particles and polylactic acid are blended and crosslinked, the mechanical property of a matrix is enhanced, the antibacterial property is achieved, fibers are prepared through spinning, supercritical carbon dioxide treatment is conducted for the first time, the nano-graphite particles can play a role of a nucleating agent, polylactic acid is promoted to form fine and uniform crystals, and the mechanical property of the matrix is improved. Carbon dioxide is effectively wrapped in the foaming process, a micropore structure is formed in the fiber, the mechanical property of a matrix is enhanced, then secondary supercritical carbon dioxide treatment is conducted, the nano-silver is loaded into the matrix through supercritical fluid, the antibacterial property and the mechanical property are further improved, then the nano-silver is soaked in a silicate solution, dehydration is conducted, and the nano-silver fiber is obtained. A silica gel layer is formed on the surface of the fiber, so that the mechanical property and the antibacterial property of a matrix are enhanced.

According to the technical scheme, the semiconductor packaging structure is characterized in that the semiconductor packaging structure comprises a shell, an outer shell is arranged on the top face of the shell, an inner frame is fixedly installed in the shell, and a chip body is arranged in the inner frame; during use, heat generated by the pins can be absorbed by surrounding the connecting pins through the top grooves, convection between the heat and the outside can be dissipated by the heat dissipation block through fitting of the heat conduction pad and the chip body, and meanwhile, the contact area between the heat dissipation block and the outside can be enlarged through arrangement of the copper columns, so that the heat dissipation effect is further improved, and the service life of the chip is prolonged. During use, after the outer shell and the shell body are installed, the copper blocks and the clamping grooves are arranged together in a sleeved mode at the moment, heat generated by the pins can be transmitted to the outside through the heat dissipation columns, the heat dissipation effect on the pin portions is achieved, and after the outer shell and the shell body are installed, organic silica gel can be injected into the injection molding grooves to achieve the dustproof and waterproof purposes. And meanwhile, internal pins and other devices can be fixed, and the stability of the equipment is improved.

The invention discloses an optical silica gel for high-flexural impact protection, an adhesive film and a preparation method, and the optical silica gel for high-flexural impact protection is prepared from the following raw materials in parts by weight: 30-60 parts of phenyl vinyl silicone oil, 5-15 parts of phenyl vinyl silicone resin, 20-50 parts of phenyl silicone resin, 0.2-5 parts of phenyl hydrogen-containing silicone oil, 0.5-8 parts of phenyl hydrogen-containing silicone resin and 0.1-0.5 part of an inhibitor, 1-10 parts of a tackifier and 0.1-1 part of a catalyst. The high-flexural impact-resistant optical silica gel for protection has a high refractive index and good physical and chemical stability, and a prepared adhesive film can be stable in property and free of yellowing at a high temperature (100-150 DEG C) for a long time (100 h), and can be cured at a high temperature (85 DEG C) and a high humidity (150 DEG C) for a long time (100 h). The coating is free of fogging in the state of high temperature resistance and humidity of 85 kg / m < 3 >, has good adhesion to various base materials, can maintain considerable mechanical strength, and is excellent in overall performance.

The invention relates to the technical field of semiconductors, in particular to a silica gel packaging power module of a novel chip bonding point reinforcing process scheme. Comprising a chip; the back surface of the chip is arranged in a conductive copper layer power circuit etching region of the insulating ceramic substrate, and the front surface of the chip is connected to the conductive copper layer power circuit etching region of the insulating ceramic substrate through a bonding wire to form a power loop; and the reinforcing layer is arranged on the bonding points on the front surface of the chip. According to the invention, the bonding point is coated with the reinforcing layer, and the bonding point is cured and reinforced, so that in a power cycle reliability tolerance experiment with higher chip junction temperature and larger temperature change, the bonding point is less deformed under the constraint of the reinforcing layer and is subjected to relatively small stress, and the bonding and binding with the chip are less prone to failure. Therefore, the application of higher junction temperature resistance of the module can be improved, the power cycle or temperature cycle resistance of the bonding and binding process is higher, and the reliability of the module is improved.

The invention provides fiber-reinforced modified silicon dioxide aerogel as well as a preparation method and application thereof, and relates to the technical field of aerogel. Specifically, the method comprises the following steps: sequentially carrying out acid treatment and surface modification treatment on inorganic fibers to obtain hydroxylated modified fibers; mixing silica sol, hydroxylated modified fibers and the modified emulsion, and sequentially carrying out vacuum impregnation treatment and gelation reaction to obtain modified silica gel; wherein the modified emulsion comprises acrylic acid, an acrylate compound and persulfate; and aging the modified silica gel, and carrying out replacement treatment and drying treatment by using an alcoholic solution to obtain the fiber-reinforced modified silica aerogel. By optimizing the preparation method, the bonding property of the silica aerogel and other materials is remarkably improved, the mechanical strength, the heat preservation performance and the heat stability of the silica aerogel are improved, the aerogel heat insulation coating is further provided, and the mechanical property, the weather resistance and the heat insulation performance of the silica aerogel coating can be remarkably improved.

The invention relates to the technical field of solid-phase silica gel preparation, in particular to a preparation device and process of modified solid-phase silica gel for robot skin. The preparation device of the modified solid-phase silica gel for the robot skin comprises a supporting frame, a reaction kettle and a temperature control tube, wherein the reaction kettle and the temperature control tube are erected on the supporting frame; the guide pipe is mounted at the bottom end of the reaction kettle, one end of the guide pipe is inserted into the temperature control pipe and is provided with two groups of liquid guide plates, the liquid guide plates are symmetrically distributed based on the guide pipe, glue outlet holes are formed in the middle parts of the two groups of liquid guide plates, and the glue outlet holes are communicated with a first gel pump; the liquid outlet end of the first gel pump is connected with a centrifugal liquid guide mechanism used for shaking up and exhausting silica gel, and a gate plate piece used for sealing the guide pipe and the reaction kettle is installed in the guide pipe; the sealing cover is mounted on the reaction kettle, and a stirring mechanism for stirring silica gel preparation raw materials is mounted on the sealing cover. The device and the process for preparing the modified solid-phase silica gel for the robot skin, provided by the invention, have the advantages of uniform stirring and high extrusion molding quality.

The invention provides an organosilicon gel and a preparation method and application thereof, the organosilicon gel is prepared from a component A and a component B. The component A comprises the following components in parts by weight: 20-90 parts of vinyl-terminated silicone oil; 0-60 parts of terminated hydrogen-containing silicone oil; 0.05 to 5 parts of cross-linked hydrogen silicone oil; 10 to 30 parts of methyl MQ silicon resin; 0.1 to 10 parts of an ultraviolet absorbent; 0.001 to 0.1 part of an inhibitor; the component B is prepared from the following component in parts by weight: 99 to 99.9 parts of vinyl-terminated silicone oil; 0.01 to 0.5 part of a catalyst; the structure of the methyl MQ silicon resin is [(CH3) 3SiO1 / 2] a [SiO2] b, and the molar ratio of a to b is (1-1.4): 1. The organic silica gel provided by the invention has good toughness, mechanical property and adhesive property, and can effectively absorb ultraviolet rays between 290-400nm.

The invention discloses a preparation method of anti-aging organic silicon gel prepared from high-thermal-conductivity filler, which comprises the following steps: carrying out surface activation on boron nitride and silicon nitride by adopting surface plasma treatment; by adopting a nano coating technology, a thin organic coating layer is formed on the surface of the filler, and the uniform dispersity of the filler in a silicon matrix is optimized; the preparation method comprises the following steps: pre-mixing part of filler with vinyl silicone oil, primarily dispersing by using a high-speed shear mixer, and then adding hydrogen-containing silicone oil for secondary mixing; carrying out mixing and dispersing treatment under a vacuum condition, thoroughly dispersing the filler in a vacuum environment by utilizing ultrasonic waves, and carrying out degassing treatment at the same time; adding an anti-aging agent, an ultraviolet light absorber and a wetting agent, then adding a platinum catalyst and a curing accelerator, and adjusting the crosslinking speed; and injecting the mixed organic silicon gel material into a mold, and carrying out pre-curing treatment. By adopting the high-thermal-conductivity filler and optimizing the surface treatment and dispersion process of the filler, the heat dissipation capability and the aging resistance are remarkably improved.

The invention discloses a sulfur-containing organic silicon gel material and a preparation method and application thereof, and the preparation method comprises the following steps: in the presence of a solvent, a sulfhydryl compound and an epoxy group of an epoxy group-containing silane coupling agent are subjected to a ring-opening reaction, and meanwhile, an alkoxy group of the epoxy group-containing silane coupling agent is subjected to a hydrolytic condensation reaction to obtain the sulfur-containing organic silicon gel material. And freeze-drying to obtain the sulfur-containing organic silicon gel material. The organic silicon material is prepared through hydrolytic condensation of the silane coupling agent, meanwhile, the sulfhydryl-containing compound and an epoxy group of the epoxy group-containing silane coupling agent are subjected to a ring-opening reaction, a large number of sulfur-containing groups are introduced into the organic silicon material in a covalent bond mode, lone pair electrons of sulfur serve as adsorption sites of iodine, and the adsorption capacity of the material to iodine is improved; the silicon substrate ensures that the material has high irradiation resistance and acid resistance, so that efficient adsorption and enrichment of volatile iodine isotopes are realized; the sulfur-containing organosilicon gel material is rapidly prepared through a one-step method, the preparation method is simple, and the cost is low.

The invention discloses a high-stability super-hydrophobic antireflection transparent coating and a preparation method thereof. The preparation method comprises the following steps: preparing a super-hydrophobic SiO2 ethanol dispersion liquid; a resin / OTS modified SiO2 double-layer coating is prepared; the prepared low surface energy molecular precursors comprise a PDMS gas phase precursor and a silica gel precursor; putting the resin OTS modified SiO2 double-layer coating and a low-surface-energy molecular precursor into a muffle furnace for calcining, naturally cooling to room temperature, and taking out to obtain the high-stability super-hydrophobic antireflection transparent coating. According to the high-stability super-hydrophobic antireflection transparent coating and the preparation method thereof provided by the invention, namely a spraying-calcining method, a nanoscale low-refractive-index porous SiO2 coating can be conveniently constructed, and low-surface-energy oligomer is attached to the surface, so that the contradictory problem that transparency and super-hydrophobicity of the transparent super-hydrophobic coating are difficult to optimize at the same time is solved; in addition, the preparation method is simple and controllable, and lays a foundation for large-area low-cost preparation.

The utility model discloses an ostomy base plate and an ostomy bag assembly. The stoma base plate and the stoma bag are used in a matched mode, the stoma base plate comprises a first adhesive area and a second adhesive area which are concentrically arranged, at least part of the first adhesive area is arranged on the peripheral side of the second adhesive area in a surrounding mode, the first adhesive area is made of medical hydrocolloid or medical acrylic acid adhesive, and the second adhesive area is made of medical hydrocolloid or medical acrylic acid adhesive. And the second adhesive area is made of medical silica gel. According to the technical scheme provided by the utility model, the peripheral hydrocolloid material can ensure that the stoma base plate has enough adhesive force, so that the stoma bag and excrement contained in the stoma bag can be suspended and borne; the inner ring silicone adhesive material has enough viscosity to seal the periphery of the stoma, but the inner ring silicone adhesive material has relatively weak viscosity, is easy to tear off and does not strain the skin, and the silicone adhesive is extremely low in allergy rate and small in damage to the skin. According to the scheme, under the condition that it is guaranteed that the stoma base plate is safe and free of leakage, the skin of a patient is better protected, and the use experience is improved.

The invention relates to the technical field of silicone OCA and discloses a method for preparing a composite silicone OCA adhesive film for a touch screen. Methyl vinyl silicone rubber, methyl MQ silicone resin, modified hydrogen-containing silicone oil, polyether tackifier, and silicon-hydrogen crosslinking agent ethyl platinum catalyst are mixed to form a silicone adhesive liquid, and then the silicone adhesive liquid is evenly coated on a release surface of a heavy release film to form an adhesive film, and finally a light release film is attached to the other side of the adhesive film to obtain the composite silicone OCA adhesive film, wherein the addition of the modified hydrogen-containing silicone oil and the polyether tackifier can effectively enhance the aging resistance and bonding performance of the composite silicone OCA adhesive film, so that the composite silicone OCA adhesive film is easier to adhere.

The connector comprises a shell, the shell comprises a matching end and a wiring end opposite to the matching end, the wiring end comprises a first cable channel for a first cable to be inserted so as to be connected with a first terminal installed in the shell, and the first cable channel is filled with silica gel. The matching end is provided with an insertion cavity for insertion of a matching connector matched with the connector, and one end, close to the first cable channel, of the insertion cavity is filled with silica gel. A connector assembly including the connector is also provided. According to the cable connector, the waterproof sealing function is achieved by filling the silica gel before the cable is assembled, the sealing effect can be achieved after the cable is inserted, convenience and rapidness are achieved, and the production efficiency of a client side is improved.