31results about How to "Scattered tightly" patented technology

The invention provides a modified ethylene-methyl acrylate copolymer and its preparation method and application. The present invention obtains an ethylene-methyl acrylate copolymer by preparing a nickel complex catalyst, and utilizing the catalyst to efficiently catalyze the copolymerization process of ethylene and methyl acrylate; and by combining the ethylene-methyl acrylate copolymer and silicon dioxide The nanoparticles were reacted with vinyltrimethoxysilane and then blended and crosslinked to prepare the modified ethylene-methyl acrylate copolymer. Through the above method, the present invention can utilize the catalyst to regulate and control the structure and performance of the ethylene-methyl acrylate copolymer, so as to promote the modification process to be carried out efficiently, so that the obtained modified ethylene-methyl acrylate copolymer has a higher Melting point, excellent mechanical properties and corrosion resistance, can be applied to reverse osmosis membrane support materials, and has high practical application value.

The invention discloses a method for inhibiting migration of a plasticizer in an esterified starch film and an esterified starch film. The method comprises the following steps: (1) adding starch milk with a certain moisture content into a high-temperature high-pressure reaction kettle, controlling the pH of the system, adding acetic anhydride or propionic anhydride, stirring and reacting for 0.5-4.0 hours at a temperature of 80-100 DEG C, then, adding water to precipitate, filtering and drying to obtain esterified starch; (3) dissolving the esterified starch in acetone to prepare a 40% solution, adding a 20-30% plasticizer, spraying on a polytetrafluoroethylene plate though a fluidized bed at a temperature of 50-55 DEG C with a spraying rate of 1.0-2.8mL / min and atomizing pressure of 0.5-1.5MPa to form a semitransparent film, thereby obtaining the esterified starch film. The method disclosed by the invention can be used for reasonably controlling an aggregation state structure inside the esterified starch film, so that the good in effect in inhibiting the migration of the plasticizer is achieved, the operability is strong and the applied range is wide.

The invention relates to a preparation method of high color fastness water-based acrylate resin color paste, resin color paste and its application and use method. The water-based acrylate resin color paste is a core-shell structure polymer, and the core polymer is acrylate The composition of polymer and pigment, the shell polymer is a water-based acrylate polymer synthesized by emulsion polymerization. In the present invention, by adding pigments during the reaction process, the molecular chains and pigments in the polymer solution synthesized by solution polymerization are more uniformly dispersed and combined more closely, and the pigments are evenly dispersed and wrapped in the latex particles after the polymer self-emulsifies to form latex particles. It reduces the uneven dispersion of pigments and the phase separation caused by aggregation during the film-forming process of the slurry, and greatly improves the color fastness of the water-based acrylic resin colorant.

The invention discloses a composite nanometer waterproof and heat-insulating coating for buildings and a preparation method thereof, belonging to the technical field of coatings. The coating of the present invention comprises the following raw materials in parts by weight: 150-200 parts of emulsion, 60-80 parts of water-based polyurethane, 60-80 parts of filler, 60-80 parts of heat-insulating composite nanomaterial, 30-50 parts of silicone hydrophobic agent, film-forming 5-10 parts of auxiliary agent, 3-6 parts of defoamer, 3-6 parts of synergist. The present invention adds a large amount of heat-insulating composite nanomaterials, and through two-step modification of acid etching and hydrophobicity, the hydrophobicity and heat-insulation performance of the material is greatly improved. At the same time, the synergist added has strong adhesion ability and can Adsorbed on the surface of nano-materials and filler particles, it can be stably dispersed in the coating, greatly reducing the peeling and cracking of subsequent coatings, and prolonging the service life of the coating. The coating of the invention has good heat insulation effect, good waterproof performance, long service life and broad market application potential.

The invention discloses an inorganic fire-prevention rust-prevention coating for steel structures and a preparation method thereof. The coating is a mixture of powder and colloid. The weight ratio of power to colloid is 1:(0.8-1.2). The colloid is potassium metasilicate. The powder is prepared from the following components in percentage by weight: 5-40% of magnesium mountain powder, 5-40% of talcum powder, 4-35% of silica powder and 4-25% of silicon aluminium powder. The granularity of the magnesium mountain powder is 2500-6500 meshes, the granularity of the talcum powder is 2000-6000 meshes, the granularity of the silica powder is 3000-8000 meshes, and the granularity of the silicon aluminium powder is 600-2000 meshes. According to the preparation method of the inorganic fire-prevention rust-prevention coating for steel structures, provided by the invention, the powder and the colloid are mixed uniformly. The inorganic fire-prevention rust-prevention coating for steel structures has good high-temperature-resistant performance and good rust-prevention effect.

The invention relates to a graphene composite powder material, which comprises a graphene material and a micro-nano structure material attached to the surface of the graphene material. The micro-nano structure material is uniformly dispersed in the graphene material and composited with the graphene material through chemical bonds or physical effects. The graphene composite powder material has the advantages of better dispersibility and less agglomeration. The invention also relates to a preparation method of the graphene composite powder material.

The invention discloses a texturing additive suitable for monocrystalline silicon wafers and its application. The texturing additive is composed of the following components in mass percent: 0.01-1 wt% of a main nucleating agent, 0.001-0.1 wt% of an auxiliary nucleating agent wt%, suede modifier 0.1~2wt%, defoaming agent 0.1~3wt%, the balance is deionized water. The texturizing additive of the invention reduces the consumption of inorganic alkali, and does not need to be washed with hydrogen peroxide after texturing, greatly reduces the consumption of chemicals, simplifies the technological process, and finally reduces the production cost of solar cells.

The present invention discloses a pyraclostrobin emulsion, comprising: pyraclostrobin oil phase solution and gluten hydrolysis suspension, wherein pyraclostrobin molecules are adsorbed around the gluten oligopeptide chain , pyraclostrobin molecules and gluten oligopeptide chains are cross-linked to form a network chain structure. The invention also discloses a method for preparing the pyraclostrobin emulsion. After the gluten is hydrolyzed, amino acids and polypeptides will be produced. Due to the electrostatic adsorption between the amino groups in amino acids and polypeptides and the ring structure in pyraclostrobin, pyraclostrobin molecules will be adsorbed on gluten oligopeptides around the chain, and pyraclostrobin molecules and gluten oligopeptide chains are cross-linked to form a network chain structure, so that the drug is evenly dispersed and combined more tightly, which can prolong the duration of action and improve the effectiveness of pyraclostrobin. utilization rate.

The invention discloses a production process for preparing an organic-inorganic composite water-retaining agent. a. After mixing sodium hydroxide and deionized water, add it to acrylic acid under the condition of ice-water bath to obtain product A; b. Mix titanium dioxide dispersion liquid with deionized water to obtain product B; c. Mix product A, After mixing product B and acrylamide, pour it into a quartz tube, and irradiate it with ultraviolet light under a nitrogen atmosphere to obtain a photopolymerization product, which is product C; d. Mix N,N-methylenebisacrylamide, ammonium persulfate and Mix with deionized water to obtain product D; e, under nitrogen atmosphere, mix and heat product C and product D to obtain product e; f, soak product e with alcohol and dry to obtain the finished product. The invention solves the problems of loose organic-inorganic interface of the water-retaining agent and difficult degradation after repeated use, prevents the water-retaining agent from becoming the next "white pollution", and improves the tightness of the organic-inorganic interface of the water-retaining agent and realizes repeated use. Significant in terms of degradation.

The present invention discloses a boscalid emulsion, comprising: boscalid oil phase solution and gluten hydrolyzed suspension, wherein, boscalid molecules are adsorbed around the gluten oligopeptide chain, and boscalid Bacteramine molecules and gluten oligopeptide chains are cross-linked to form a network chain structure. The invention also discloses a method for preparing the boscalid emulsion. Wheat gluten will produce amino acids and polypeptides after hydrolysis. Due to the electrostatic adsorption between the amino groups in amino acids and polypeptides and the ring structure in boscalid, boscalid molecules will be adsorbed around the gluten oligopeptide chain , and boscalid molecules and gluten oligopeptide chains are cross-linked to form a network chain structure, which makes the drug evenly dispersed and combined more closely, which can prolong the duration of action and improve the effective utilization rate of boscalid.