9138results about How to "Improve aging resistance" patented technology

The invention relates to a preparation method of a wet process mixed natural rubber material. The method comprises the following steps of: preparing slurry and soaking 15-40 percent of dry white carbon black in 60-85 percent of deionized water; adding a coupling agent and a surfactant, uniformly mixing, grinding, preparing latex mixed liquor, extracting natural latex and adding white carbon black water dispersoid into the latex; stirring and mixing to obtain a latex mixed liquor, flocculating and adding acetic acid into the mixed liquor; performing rubber washing and dehydration by using a rubber washing machine and feeding to a rubber pelletizer for pelletizing; and feeding rubber particles into a box drying cabinet for drying. The preparation method has the advantages of simple machining process, small equipment investment, realization of various ideal performances with the most ordinary white carbon black, low dust pollution in the entire production process and energy saving. A tire manufactured with the method has small rolling resistance, low heat generation, high tensile strength, high tearing strength and high rubber material ageing resistance. Mixing of the white carbon black is performed in a liquid phase, so that the dispersivity and uniformity are enhanced.

The invention discloses a production method for insert gloves water-based polyurethane coating bonding materials. The method comprises the following steps of: under the protection of dry nitrogen, adding polyether glycols (including polyether diatomic alcohol and / or polyether triatomic alcohol) having undergone vacuum dewatering and isocyanate into a reaction vessel; heating the mixture up to between 80 and 100 DEG C for reaction after even mixing; then adding a hydrophilic chain extender such as dihydromethyl propionic acid (DMPA) and a catalyst for reaction at a temperature of between 80 and 100 DEG C; finally adding the chain extender and a solvent into the mixture for reaction at a temperature of between 55 and 65 DEG C until the NCO content of the isocyanate group does not change; discharging the reactant after temperature reduction to obtain an ionomer; neutralizing a preformed polymer with triethylamine or diethanolamine or triethanolamine and then adding water the mixed solution for emulsification to obtain water-based polyurethane latex; and carrying out reduced pressure distillation to remove the solvent and obtain the product. The synthesized water-based polyurethane resin which serves as a gloves coating has the advantages of good air and moisture permeability, excellent mechanical performance, solvent resistance, ageing resistance, resistance to corrosion caused by chemical mediators, oil resistance, resistance to hooking, cutting and piercing, excellent abrasion resistance, odorlessness, innocuous and nondestructive for contacting with skin, etc.

The invention relates to the technical field of functional master batches, in particular to a light diffusion master batch for transparent plastics and a preparation method thereof. The light diffusion master batch comprises the following components in percentage by weight: 5-50% of light diffusant, 1-8% of lubrication dispersant, 2.5-7.5% of antioxidant, 2.5-7.5% of ultraviolet light absorber and 27-91% of matrix resin; after being mixed, the components are placed in an extruder for being molten and extruded; and the extruded materials are cooled, pelletized and dried to prepare the product of light diffusion master batch. The light diffusion master batch has stable properties, high transparency and high haze; and as the master batch contains a light stabilizing agent and a heat stabilizing agent with high concentrations, plastic products produced thereby have excellent ageing resistance, and are suitable for long-time use in locations of natural illumination or manual illumination.

The invention provides a polymer back panel of a solar battery assembly. The polymer back panel comprises a base film layer, binding layers on both sides of the base film layer, a fourth thin film layer and a fifth thin film layer on the other two sides of the binding layers, wherein the base film layers contain at least one of the following components: polyamide polymers, polypropylene and acrylic polymers, polyethylene and ethylene polymers, polyvinylidene chloride, styrene polymers, ABS (acrylonitrile butadiene styrene) resins, liquid crystal polymers, acrylic acid polymers, polyphenyl ether, polycarbonate and polymer alloy of polycarbonate and poly(C2-6 alkal terephthalate). In addition, the invention also provides a manufacture method of the back panel. By adopting a thin film structure made of one or more of the above polymers to substitute for the conventional PET (polyethylene terephthalate) layer, the polymer back panel has excellent processing formation performance, material mechanical performance, barrier performance and anti-aging performance; and a back panel laminated film can be prepared by molten co-extrusion or extrusion composite process, with the advantages of significantly improved bonding strength between the films and simplified production process.

The invention relates to a fluorocarbon nanometer solar heat-insulation reflective paint, a preparation method thereof and a using method thereof. The paint can be used for roofs and glass curtain walls of the building industry, offshore drilling platforms, oil tanks and petroleum pipelines of the petroleum industry, the surfaces of cars and trains of the transportation industry, hulls and decks of the ship-building industry, and the tanks and warships of the weapon and aerospace industry. The fluorocarbon nanometer solar heat-insulation reflective paint comprises a component A and a component B, wherein the component A comprises the following materials in percentage by weight: 40%-70% of fluorocarbon resin, 1%-10% of nanometer TiO2 concentrated slurry, 10%-30% of infrared-ray reflective pigment, 3%-10% of hollow micro beads, 1%-5% of auxiliaries and 10%-20% of organic solvent; and the component B is cross-linking agent. The preparation method for the fluorocarbon nanometer solar heat-insulation reflective paint comprises the following steps: 1) preparing, dispersing and grinding the materials of the component A in proportion until the fineness is lower than 30 microns; and 2) mixing and curing the component A and the component B to prepare the fluorocarbon nanometer solar heat-insulation reflective paint. The fluorocarbon nanometer solar heat-insulation reflective paint provided by the invention is suitable for normal-temperature drying or low-temperature baking and drying; moreover, a coating film formed by the paint has the characteristics such as high reflectivity, a good heat-insulation effect, high corrosion prevention, high weather resistance, high self-cleanness, low friction and the like.

The invention relates to anti-pollution anti-aging rustless steel coating material and a process for preparation, and coating material comprises acroleic acid resin, film forming matter, filling material, dissolvent and auxiliary agent which are mixed, the film forming matter comprises fluoro containing resin, water-based polyurethane and epoxide resin, the filling material comprises nanometer silicon oxide. The process comprises dissolving acroleic acid resin in dissolvent, further adding film forming matter, filling material, and auxiliary agent, balling to evenly mix. The rustless steel coating material of the invention adopts nanometer silicon oxide and fluoro containing resin to modify acroleic acid coating material, utilizes the ultraviolet screening performance of nanometer silicon oxide, the particle diameter of nanometer-grade particle and low surface tension of fluoro containing resin to lead the anti-aging capability and anti-ultraviolet performance of acroleic acid resin which is prepared to be greatly enhanced, the invention has longer life span than the existing normal acroleic acid resin coating material, which has better fingerprint resisting effect, and the quality and the level are greatly improved, the scope of application is further enlarged.

A solar panel back film comprises a PET film matrix with the thickness of 100-350 micrometers. Fluorine-containing polymer coatings of 15-30micrometers cover the two faces of the matrix, and the fluorine-containing polymer coatings are formed by mixing raw material components according to a proportion to obtain mixed emulsion and coating the PET film matrix by the mixed emulsion which is swollen under the temperature between 80 DEG C and 200 DEG C, wherein raw materials of the fluorine-containing polymer coatings comprise, by mass, polyester PET powder, fluorine-containing resin, solvent, a cross-linking agent, padding and ethylene glycol. The polyester PET powder is polyester PET powder with grain size smaller than 25 micrometers, wherein the polyester PET powder is formed by smashing precipitate obtained by dissolving in phenol-carbon tetrachloride mixed solvent. The fluorine-containing resin is fluorine-containing macromolecule resin. The solar panel back film is easy to process, tearing resistant and superior in electrical insulation performance and weather fastness.

The invention discloses a flame-retardant EPS (expandable polystyrene) foam thermal-insulation board and a preparation method thereof. The method comprises the following steps: 1) preparing flame-retardant EPS prefoaming granules; 2) preparing a flame-retardant EPS foam board; 3) carrying out coating modification on the flame-retardant EPS foam board: adding a fireproof adhesive into a polystyrene board modification device, in which the flame-retardant EPS foam board is arranged, under the high pressure of 0.3-1.0 MPa, and standing under the pressure of 0.01-0.08 MPa for 10 seconds-10 minutes until the fireproof adhesive penetrates into the flame-retardant EPS foam board, thereby achieving the goal of coating modification; and 4) drying and curing to form. The heat conductivity coefficient of the flame-retardant EPS foam thermal-insulation board is lower than 0.055 w / m.k, the specific gravity is down to 150 Kg / m<3> below, the compression strength is greater than 150 KPa, and the heat value is less than 3 MJ / kg.