49results about How to "Tight network structure" patented technology

The present invention discloses one kind of temperature sensitive chitosan hydrogel comprising chitosan 0.2-20 wt%, glycerin 1-60 wt% or mannitol 0.5-40 wt%, and borax 0.5-20 wt%, and its preparation process including the steps of dissolving chitosan in acid solution, adding glycerin or mannitol solution, adding borax solution while stirring, and heating the mixed solution to gelation temperature to obtain hydrogel. The temperature sensitive chitosan hydrogel is liquid at lower temperature and become gel at body temperature, and it may be applied as the injection implanted material and painted material. The preparation process has mild condition and environment friendship, and the temperature sensitive chitosan hydrogel has high temperature sensitivity, high mechanical strength, and wide application foreground in medicine carrier, biological tissue engineering, etc.

The invention discloses an ultra low film peeling voltage polyurethane protective film. The ultra low film peeling voltage polyurethane protective film, from top to bottom, comprises an internal adding type antistatic PET layer, a polyurethane antistatic adhesive layer, and a PET antistatic release film layer; the impedance of the surface and the impedance of the internal part of the internal adding type antistatic PET layer are the same; the polyurethane antistatic adhesive layer is composed of polyurethane, a curing agent, and an antistatic agent at a mass ratio of 70:5:0.1-70:12:4. Applications of the ultra low film peeling voltage polyurethane protective film is capable of preventing breakdown and destroy of touch screen inductors caused by excessive voltage generated in film peeling process. The internal structure of the polyurethane antistatic adhesive layer in the ultra low film peeling voltage polyurethane protective film is compact, so that it is convenient for dispersion of the antistatic agent molecules and release of static electricity, and antistatic agent precipitation is not caused at high temperature high humidity environment.

The invention provides a water-based chameleon solvent-resistant elastic coating, which comprises the following ingredients (by weight): 10-15 parts of deionized water, 40-60 parts of waterborne resin, 6-10 parts of chameleon pigment, 8-10 parts of a water-based curing agent, 2.5-5 parts of water-based matting powder, 0.3-0.5 part of a dispersant, 0.3-0.5 part of a wetting agent, 0.8-1.2 parts ofa leveling agent, 3-4 parts of a coalescing agent, 1-2 parts of a hand feeling agent, 1-2 parts of water-based wax, 0.1-0.3 part of an antifoaming agent, 0.1-0.3 part of a pH regulator, 0.2-0.4 part of a thickening agent, 2-3 parts of propylene glycol methyl ether acetate, and 1-3 parts of DB7650 special modified polyurethane. The coating is safe and environmentally-friendly, and has good solventresistance, film fullness, scratch resistance and wear resistance. In addition, hand feeling and application property are also greatly enhanced.

The invention discloses a slow-release fertilizer special for flowers. The slow-release fertilizer is prepared from, by weight, 80-120 parts of organic fertilizer, 10-25 parts of urea, 8-21 parts of ammonium dihydrogen phosphate, 5-17 parts of calcium superphosphate, 8-18 parts of ammonium chloride, 25-38 parts of potassium chloride, 3-11 parts of potassium silicate, 2-8 parts of manganese sulfate, 1-5 parts of ammonium molybdate, 1-5 parts of ethylenediaminetetraacetic acid ferric sodium salt, 2-9 parts of ammonium zinc phosphate, 8-15 parts of biochar, 5-15 parts of bone meal, 0.3-0.9 part of urease-nitrification inhibitor, 3-9 parts of attapulgite, 3-11 parts of kaolin, 2-9 parts of weathered coal and 1-5 parts of potato starch. The provided slow-release fertilizer special for the flowers has the advantages that the formula is reasonable, nutrients are comprehensive, the slow-release effect is good, and the slow-release fertilizer is used for flower planting, has long fertilizer efficiency and high utilization rate.

The invention discloses a preparation process of flame-retardant polyester resin, which is characterized by comprising the following steps: adding a flame-retardant reinforcing agent, absolute ethyl alcohol and a sodium hydroxide solution with the mass concentration of 18% into a reaction kettle, stirring to dissolve, adding saturated polyester resin liquid, reacting for a period of time, adding asaturated solution of sodium carbonate, dropwise adding diaminosilane after stirring and reacting for 4 hours, continuously adding diethylene glycol monoethyl ether acetate in the reaction process, carrying out rotary evaporation to recover the solvent, and washing the product to be neutral to obtain the flame-retardant polyester resin. According to the flame-retardant polyester resin prepared bythe invention, the saturated polyester resin is subjected to cross-linking polymerization by virtue of a flame-retardant enhancer, and two amino groups in the diaminosilane added into the saturated polyester resin can be subjected to addition reaction with olefin groups, so that the polyester resinis cross-linked with flame-retardant enhancer and then cross-linked by virtue of the diaminosilane to form a reticular structure; therefore, the prepared resin has relatively strong performance.

The invention discloses a mildew-proof agent for artificial boards, and belongs to the technical field of additives for artificial boards. The mildew-proof agent has the advantages that mixed alcoholis added into tetrabutyl titanate which is a titanium source, adsorption thin layers are formed on the surfaces of particles, accordingly, durable and stable antibacterial and mildew-proof effects canbe guaranteed, and the stability of bacterial inhibition agents can be improved; oxidizing agents added into the mildew-proof agent are Jones reagents, alpha-site hydroxyl can be directionally oxidized by the oxidizing agents to obtain aldehyde, beta-site hydroxyl can be directionally oxidized by the oxidizing agents to obtain carbonyl, soybean proteins can be decomposed into different types of amino acid, Schiff base can be formed, accordingly, pore structures inside systems can be densely filled, and the moisture barrier and mildew-proof properties can be effectively enhanced; partial functional group locations in cross-linked networks of the systems can be occupied by added lavender essential oil in preparation procedures, the vibration intensity of covalent bonds in molecules in the cross-linked networks can be lowered, accordingly, the water-resistant performance further can be reinforced, ascorbic acid can have bacterial inhibition performance, and the problem of poor mildew-proof effects of current common mildew-proof agents for existing artificial boards can be solved by the aid of the mildew-proof agent.

The invention discloses an anti-aging rubber sealing ring material and a preparation method thereof. The anti-aging rubber sealing ring material is prepared from the following raw materials in parts by mass: 80-90 parts of fluorinated silicone rubber, 15-20 parts of acrylic rubber, 10-15 parts of chloroprene rubber, 10-15 parts of polyurethane rubber, 8-12 parts of polycaprolactone, 12-20 parts ofa filler, 5-8 parts of nano silica, 6-10 parts of a quartz fiber, 3-8 parts of a composite anti-aging agent and 2-5 parts of a vulcanizing agent. The preparation method of the anti-aging rubber sealing ring material comprises the following steps: weighing the raw materials, pretreating the raw materials, preparing a premix, preparing blended rubber, carrying out vulcanization molding, and carrying out trimming treatment. Due to addition of the environmental-friendly polycaprolactone in a sealing ring made of the anti-aging rubber sealing ring material, the polycaprolactone is cross-linked with the polyurethane rubber to form a dense net structure, and in addition, the material has a certain self repairing function; meanwhile, due to addition of the nano silica and the quartz fiber, the pressure resistance and the aging resistance of the sealing ring material are improved, and the service life of the sealing ring can be prolonged.

The invention discloses an antibacterial coil coating with water resistance, which comprises the following components in parts by weight: 42-56 parts of modified polyester resin, 6-10 parts of amino resin, 13-21 parts of pigment, and precipitated barium sulfate 2-8 parts, dispersant 0.3-0.9 parts, leveling agent 0.1-0.7 parts, antioxidant 0.1-0.3 parts, acid catalyst 0.2-0.6 parts, solvent 20-28 parts. The modified polyester resin in the coating prepared by the present invention is prepared by reacting a saturated polyester resin with a dislocation antibacterial enhancer, and the terminal aldehyde group and the phenolic hydroxyl group in the dislocation antibacterial enhancer can respectively react with the styrene in the saturated polyester resin liquid. The ketone group reacts with the bromine element, so that one end of the dislocation antibacterial enhancer is grafted on the carboxyl side of the ester group in the polyester resin, and the other end is grafted on the hydroxyl side of the ester group to realize dislocation crosslinking. When the base is hydrolytically broken, the polymer can still be cross-linked through the dislocation antibacterial enhancer, and the polymer still maintains a network structure, so that its structural characteristics will not change.

The invention provides an anti-aging rubber sealing ring material and a preparation method thereof, and belongs to the technical field of rubber sealing materials. The preparation method of the anti-aging rubber sealing ring material comprises the following steps of weighing of raw materials by weight, raw material mixing, primary mixed material re-treatment, secondary rubber compound re-treatment, die assembly and vulcanization molding, edge cutting and trimming, and quality inspection and classification. The anti-aging rubber sealing ring material and the preparation method thereof have theadvantages that bauxite powder is dispersed in a raw material network structure, so that the wear resistance of a rubber gasket is improved; due to the use of a plasticizer, the vitrification temperature of rubber is reduced, the plasticity and fluidity of the rubber are enhanced, and the hardness and tensile stress of the rubber are reduced; nano silicon dioxide and quartz fiber are added, so that the pressure resistance, anti-aging performance and corrosion resistance of the sealing ring material are enhanced, and the phenomena of overflow and leakage are effectively prevented; the preparation process is simple, and the cost is low.

The invention belongs to the field of intelligent materials. The invention aims to provide a preparation method of an ionic electroactive driver based on carboxylated bacterial cellulose, and the driver is low in cost, excellent in performance and good in reliability. According to the technical scheme, the preparation method of the ionic electroactive driver based on carboxylated bacterial cellulose comprises the following steps: 1) preparing a bacterial cellulose dispersion liquid; 2) preparing a bacterial cellulose-polypyrrole dispersion liquid; 3) preparing a bacterial cellulose-polypyrrole-ionic liquid composite membrane; and 4) laying an electrode layer to prepare the bacterial cellulose-based ionic driver.

The invention provides a water-based chameleon solvent-resistant elastic coating, which comprises the following components, each component and the mass parts of each component are: 10-15 parts of deionized water, 40-60 parts of water-based resin, 6 parts of chameleon pigment ~10 parts, water-based curing agent 8-10 parts, water-based matting powder 2.5-5 parts, dispersant 0.3-0.5 parts, wetting agent 0.3-0.5 parts, leveling agent 0.8-1.2 parts, film-forming aid 3-4 parts 1-2 parts, hand feeling aid 1-2 parts, water-based wax 1-2 parts, defoamer 0.1-0.3 parts, pH regulator 0.1-0.3 parts, thickener 0.2-0.4 parts, propylene glycol methyl ether acetate 2-3 parts, 1-3 parts of DB7650 special modified polyurethane. The coating is not only safe and environmentally friendly, but also has good solvent resistance, fullness of the paint film, scratch resistance, abrasion resistance, and the handle and workability are also greatly improved.

The present invention discloses one kind of temperature sensitive chitosan hydrogel comprising chitosan 0.2-20 wt%, glycerin 1-60 wt% or mannitol 0.5-40 wt%, and borax 0.5-20 wt%, and its preparation process including the steps of dissolving chitosan in acid solution, adding glycerin or mannitol solution, adding borax solution while stirring, and heating the mixed solution to gelation temperatureto obtain hydrogel. The temperature sensitive chitosan hydrogel is liquid at lower temperature and become gel at body temperature, and it may be applied as the injection implanted material and painted material. The preparation process has mild condition and environment friendship, and the temperature sensitive chitosan hydrogel has high temperature sensitivity, high mechanical strength, and wide application foreground in medicine carrier, biological tissue engineering, etc.

The invention discloses an in-situ reinforcing and toughening urea resin moulding compound and a preparing method thereof. The preparing method is characterized by comprising the steps that 0.01-10 parts of polyvinyl alcohol is taken, dissolved into distilled water for 3 h at the temperature of 95 DEG C, prepared into a 5-20% water solution and cooled to the room temperature for use; the temperature of a reaction kettle is controlled to be 20 DEG C-80 DEG C, methanal, a polyvinyl alcohol water solution and 0.1-20 parts of toughening agent are placed into the reaction kettle and fully stirred to react for 10-100 min, then 41-62 parts of urea are added, the mixture is stirred to react for 10-120 min, then 0.3-2.5 parts of lubricating agent, 5-50 parts of crop fiber powder or methyl cellulose, and 0.1-2 parts of curing agent are added, after the mixture is fully mixed uniformly, the reaction kettle is closed, vacuum is started, the mixture enters a kneading and vacuum drying stage, the temperature of the reaction kettle rises to 60 DEG C-95 DEG C, the mixture is kneaded and dried for 60-300 min, and then vacuumizing, cooling and smashing are carried out, so that the reinforcing and toughening urea resin moulding compound is prepared.

The invention discloses a preparation method of cod skin gelatin composite hemostatic dressing, which comprises the following steps: (1) Preparation of gelatin / sodium alginate composite solution: dissolving sodium alginate in distilled water and stirring, then adding freeze-dried cod The gelatin is heated and stirred, and the gelatin / sodium alginate composite solution is obtained after vacuum degassing; (2) crosslinking: the gelatin / sodium alginate composite solution prepared in step (1) is subjected to a crosslinking reaction with a crosslinking agent; (3 ) Disinfection and sterilization: the product of step (2) is sterilized to obtain the cod skin gelatin composite hemostatic dressing. The hemostatic dressing prepared by the present invention is pure white as a whole, dense and free of impurities, and its physical properties are greatly improved, its tensile strength and water absorption are higher than those of existing products, its hemostatic performance reaches the hemostatic effect of existing products, and its microstructure is in a uniform porous shape , is suitable for cell adhesion, has good biocompatibility and in vivo degradability, and is a good biomedical dressing.

The invention discloses a method for reducing the water absorption rate of a water-resistant paper-faced gypsum board and a mixed slurry preparation device, comprising the following steps: S100, breaking up and frying the desulfurized gypsum to prepare mature gypsum powder; S200, fully mixing the cement and the cooked gypsum powder Mix to prepare clinker; S300, mix the clinker with water, foaming agent, and hydrogenated silicone oil, and fully stir to prepare a uniform mixed slurry; S400, continuously pour the slurry between two layers of protective paper , the gypsum board wet board is obtained through extrusion molding; S500, the gypsum board wet board is solidified, cut, dried, and edge-sawed to obtain a paper-faced gypsum board product. The present invention changes the properties of the original gypsum by adding cement to the fried gypsum according to a certain proportion after frying the gypsum and mixing them uniformly. The addition of cement can effectively form a dense network structure and reduce the water absorption rate of the gypsum board. , so that there is no need to add too much silicone oil, so as to avoid the waste of silicone oil.

The present invention provides a high-temperature-resistant acid-resistant and alkali-resistant acrylate pressure sensitive adhesive composition, which comprises, by weight, 100 parts of an acrylate adhesive, 1.5-3 parts of an isocyanate cross-linking agent, 0.5-1.5 parts of a metal ion cross-linking agent, and 10-200 parts of an organic solvent. The invention further provides a high-temperature-resistant acid-resistant and alkali-resistant acrylate pressure sensitive adhesive protection film prepared from the composition. According to the acrylate pressure-sensitive adhesive composition of the present invention, the isocyanate cross-linking agent and the metal ion cross-linking agent are simultaneously used so as to significantly increase the cross-linking degree, and can react to form the dense network structure so as to achieve the high transparency, such that the protection film made of the acrylate pressure-sensitive adhesive composition cannot produce mist forming and adhesive residue at a high temperature (160 DEG C, more than 2 h), and cannot produce dissolving and adhesive residue after strong acid and alkali (pH value of 2 or 13, respectively 1 h) soaking.