4476results about How to "Improve anti-aging" patented technology

The invention discloses a temperature resistant salt tolerant high efficiency gel and a preparation method and application thereof. The preparation method is characterized in that the preparation method comprises the following steps: preparing a comb-shaped associated copolymer PAH containing macromonomers and functional hydrophobic monomers into an aqueous solution having the concentration of 0.1 to 4g/L, the crosslinking agent concentration of 0.01 to 1.0g/L, the surfactant concentration of 0.01 to 8mmol/L and the sodium sulfite thermal stabilizer concentration of 0.005 to 1.0g/L; adding the aqueous solution into a mixing container with a stirring device; stirring the aqueous solution evenly at the room temperature; regulating the pH value of the solution to be equal to between 4 and 11, and obtaining a temperature resistant salt tolerant high efficiency gel polymer solution system used for tertiary oil recovery and scavenge, displacement modification, profile modification or water shutoff. The polymer solution system has micro-crosslinking to form the gel during the flowage inside the oil reservoir. The gel has good elasticity, not easy dehydration, stable gelling performance, and excellent tackification, temperature resistance, salt tolerance, shearing resistance and ageing resistance.

The invention discloses a water soluble copolymer with high viscosity and salt resistance, and a preparation method and an application thereof. The preparation method comprises the steps of: adding acrylamide 20 weight parts, an anionic monomer or/and a cationic monomer 0.1-15 weight parts,, a vinyl polycyclic aromatic hydrocarbon 0.05-4 weight parts,, a surfactant 0.5-90 weight parts,, and deionized water 70-900 weight parts, into a three-neck reaction bottle, adjusting the solution pH to 2.5-9, introducing N2 for 30min, adding an initiator persulfate 0.001-0.2 weight parts, at 20-70DEG C, and reacting for 6-36 hours to obtain a low-molecular weight water soluble copolymer with molecular association ability, high viscosity and salt resistance, which can be used in intermediate-permeability oil reservoir and low-permeability oil reservoir development. An associated water soluble polymer oil displacement agent is obtained by preparing the copolymer into an aqueous solution with copolymer concentration of 0.3-3 g/L and surfactant concentration of 0.01-4 mmol/L, adding into a mixer with a stirring device, and stirring uniformly at room temperature; and the obtained oil displacement agent has high viscosity, salt resistance, temperature resistance and shear resistance, and can be used in intermediate-permeability oil reservoir and the low-permeability oil reservoir development.

The present invention relates to the preparing technology of composite rubber material. Carbon nanotube via surface treatment and liquid rubber are ultrasonically mixed and added into partial hydrogenated nitrile-butadiene rubber to prepare mother rubber; the mother rubber is mixed with the rest hydrogenated nitrile-butadiene rubber, carbon black, zinc oxide and sulfurizing agent, and the mixture is mixed in a rolling mixer or a Banbury mixer and sulfurized to obtain the carbon nanotube modified hydrogenated nitrile-butadiene rubber. The present invention has the beneficial effects of raised heat performance, antiwear performance, mechanical strength, antiageing performance, etc. raised use performance and expanded application range.

The invention belongs to the technical field of road asphalt modification and relates to an ultraviolet aging-resistant compound modified asphalt, wherein on the basis of 100 parts by weight of matrix asphalt, in parts by weight, 1-6 parts of styrene-butadiene-styrene block copolymer, 3-18 parts of waste rubber powder, 5-10 parts of rock asphalt, 0.3-2.5 parts of sweller, 0.03-0.2 part of activator, 0.1-1 part of plasticizer and 0.2-0.5 part of stabilizer are further added, wherein the sweller is furfural extract oil which is subjected to dewaxing treatment previously; the furfural extract oil contains 60wt%-88wt% of aromatic components which contain 40-65wt% of heavy aromatic hydrocarbon; and the waste rubber powder is waste rubber tire tread rubber powder having the content of carbon black between 28wt% and 58wt% and the grain diameter between 45 and 80 meshes. The ultraviolet aging-resistant compound modified asphalt provided by the invention is up to the standard of the polymer modified asphalt in performance, and the ultraviolet aging resistance of the asphalt is improved to a large extent; and waste resources are utilized.

The present invention discloses a nano silicon dioxide emulsion, its preparation method and application. Said emulsion contains nano silicon dioxide, silane coupling agent, surfactant and water. The described nano silicon dioxide and the described silane coupling agent are combined into a hydrophobic particle, and the described hydrophobic particles are covered with surfactant, and dispersed in the water. Its preparation method includes the following steps: adding water-soluble alcohol into the colloid solution of silicon dioxide in the water, then adding silane coupling agent and adding surfactant and water; another preparation method includes the following steps: adding water-soluble alcohol or aqueous solution of described alcohol into nano silicon dioxide gel, then adding silane coupling agent, surfactant and water. Said emulsion can be directly added into the water-based paint, and can be used for modifying water-based paint and improving various properties of the water-based paint.

The invention relates to a medical used hot melt pressure-sensitive adhesive type base material and its preparing method which provides a hot melt pressure-sensitive adhesive and an adhesive used paste preparation. The main element of the hot melt pressure-sensitive adhesive is styrenic thermoplastic elastomer SIS (phenylethene -isoprene -phenylethene three block copolymers) with adhesive resin (such as petroleum resin, terpenes polymer, polyisobutylene), flexing oil (such as liquid petrolatum) and aging retarder (such as propyl gallate, BZ) and so on.

The invention discloses a nano fog-dissipation multifunctional greenhouse agricultural film, and in particular relates to a three-layer co-extruded EVA (ethylene-vinyl acetate copolymer) long-life fog-dissipation environment-friendly multifunctional greenhouse film, belonging to the field of agricultural mulching films. The raw material formula of an outer layer comprises the following components in percentage by weight: 20-50% of linear low-density polyethylene (LLDPE), 20-50% of low-density polyethylene (LDPE), 10-20% of metallocene polyethylene (mPE) and 5-10% of double-prevention masterbatch; the raw material formula of a middle layer comprises the following components in percentage by weight: 30-40% of ethylene-vinyl acetate copolymer (EVA), 20-40% of linear low-density polyethylene (LLDPE), 20-40% of low-density polyethylene (LDPE) and 5-10% of three-prevention masterbatch; the raw material formula of an inner layer comprises the following components in percentage by weight: 30-40% of ethylene-vinyl acetate copolymer (EVA), 10-20% of linear low-density polyethylene (LLDPE), 20-50% of low-density polyethylene (LDPE) and 5-10% of three-prevention masterbatch; and the formulas of the outer layer, the middle layer and the inner layer are uniformly mixed respectively, master batches are prepared by using a double-head thread screw double-screw extruding machine, a three-layer film is formed through a co-extrusion die head and is extruded out to prepare the multifunctional agricultural greenhouse film. Every quality technical index of the film reaches or exceeds a national standard, and a small part of the indexes is more than 2 times better than the national standard, so that the film is excellent in antiaging performance and cannot generate fog drops, and the service life of the film reaches more than 3 years.

The high transparency polyester film contains nano level silica of grain size 20-50 nm and micron level silica of grain size 1.2-2.0 microns. The nano level silica accounts for 50-2000 ppm of total polyester film weight, and the micron level silica 1-300 ppm. The production process of the high transparency polyester film includes the first preparation of silica suspension, the subsequent conventional polymer producing course to produce polyester slice, and final conventional melting extrusion of the slice and bi-directional stretching. The product of the present invention has high transparency, waterproof property, blocking property, heat resistance and antiaging property.

The invention discloses cation high-performance size which is made from the following raw materials: corn starch, hydroxides, trimethylamine hydrochloride and persulfate through a hybrid reaction, wherein corn starch accounts for 80%-95% by weight, calcium hydroxide and/or magnesium hydroxide account(s) for 1%-10% by weight, trimethylamine hydrochloride accounts for 1%-15% by weight, and persulfate accounts for 0.1%-15% by weight. The cation high-performance size has the advantages of strong adhesive ability, good film forming property, tough size film, and excellent elasticity; the flexibility (fatigue endurance) is improved by 3-4 times in comparison with common modified starch size; the cation high-performance size is excellent in wear-resisting and anti-aging properties; and the size has good flowability under the condition of normal temperature, and is stable in viscosity. Polyvinyl alcohol is not used. When pure cotton yarns are sized during spinning, 60-count yarns of common tightness do not need polyvinyl alcohol, and when polyester or pure cotton yarns higher than 60-count are sized, no polyvinyl alcohol is needed or only a small amount of polyvinyl alcohol is needed, so that desizing is easy, the size waste is easy to process and causes small pollution to the environment; and zero pollution emission is realized in a production process.

The invention provides a microbial sand-fixing dust depressor and a preparation method thereof. The microbial sand-fixing dust depressor comprises the following components in percentage by mass: 0.8-2.5% of microbial powder, 3.0-5.0% of urea, 8.1-10.1% of calcium chloride and the balance of deionized water, wherein the microorganism in the microbial sand-fixing dust depressor is bacillus pasteurii powder. The preparation method comprises the following steps: proportionally mixing the calcium chloride with the deionized water, stirring till the calcium chloride is completed dissolved, adding the urea, and after the urea is dissolved, adding the bacillus pasteurii powder till the bacillus pasteurii powder is completely dissolved, thereby obtaining a mixed solution, namely the microbial sand-fixing dust depressor. Compared with the traditional inorganic sand-fixing agent, the microbial sand-fixing dust depressor is high in permeability; compared with the traditional organic sand-fixing agent, the microbial sand-fixing dust depressor has the characteristics of high ageing resistance, simplicity in preparation, convenience in construction and the like. Proved by desert sample tests, the sand-fixing dust depressor is high in ageing resistance and wind erosion resistance and has unconfined compressive strength higher than 1MPa. Proved by raise dust sample tests, the sand-fixing dust depressor has a good dust fixing effect.

The invention relates to an ultraviolet curing liquid optical clear adhesive and a preparation method thereof, and belongs to the field of bonding adhesives. The method comprises the steps that toluene diisocyanate, polyethylene glycol and hydroxyethyl acrylate are taken as raw materials; a urethane acrylate prepolymer is synthesized through polystep reaction by a bulk method; the prepolymer is taken as a main body; a photoinitiator, a composite reactive diluent and other assistants are added; and then the ultraviolet curing liquid optical clear adhesive is prepared. The ultraviolet curing liquid optical clear adhesive prepared by the preparation method has the characteristics that the ultraviolet curing liquid optical clear adhesive is low in smell, moderate in viscosity, good in flexibility, high in light transmittance and refractive index, high in bonding strength, waterproof, and good in cold and heat shock resistance, weather resistance and ageing resistance. The ultraviolet curing liquid optical clear adhesive is completely transparent after being cured, and can keep stable high transparency and is free from yellowing, whitening and degumming for a long term in high-temperature and high-humidity environments.

The invention provides a metal surface anti-corrosion layer structure and a coating method thereof. The anti-corrosion layer structure comprises a priming paint layer of 40-80 mu m, an intermediate paint layer of 50-100 mu m and a surface paint layer of 40-80 mu m, wherein, the priming paint layer is formed by coating object system paint on epoxy-polyamide, the intermediate paint layer is formed by coating object system paint on heavy-sizing epoxy-polyamide, and the surface paint layer formed by coating acrylic acid polyurethane system paint. The coating method comprises coating the priming paint layer on the metal surface; coating the intermediate paint layer on the priming paint layer; and coating the surface paint layer on the intermediate paint layer. The metal surface anti-corrosion layer structure in the embodiment of the invention has good anti-corrosion performance, ageing resistance and mechanical performance, simple technique, low cost which is lower than that of commonly used powdery paints at present, and no heavy metals, which is environment-friendly.