52results about How to "Good resistance to UV radiation" patented technology

This invention supply a epoxide resin combination and its preparation method, and its application as filling material of railway plate type orbit convex shape block platform. It takes ethoxyline resin, pigment, padding, curing agent and other accessory ingredient as main ingredient. This ethoxyline resin combination possess good construction usability, good cement bond property, appropriate elasticity and syntheses mechanical property, and has performance of ultraviolet radiation proof, moisture-proof.

The invention provides a composite material taking a carbon fiber/polyimide fiber hybrid fabric as the enhancing body and a preparation method thereof. The composite material is prepared by spinning or weaving carbon fibers and polyimide fibers to obtain carbon fiber/polyimide fiber hybrid fabrics; and then compounding carbon fiber/polyimide fiber hybrid fabrics with a filling material to obtain the composite material. Polyimide fibers are taken as one of the main materials of the enhanced body, the problem that the composite material is very fragile when only carbon fibers are taken as the enhancing body is solved, on the premise that the mechanical strength of the composite material is not influenced; and moreover, the impact resistant performance and the insulation property of the composite material are greatly improved. The composite material can be used to produce bulletproof clothes, bulletproof bags, bulletproof armoring, bulletproof guard boards, bulletproof helmets, safety helmets, collision resistant walls, collision resistant protective boards, bumpers, brake discs, grinding wheels, friction materials, and the like. Furthermore, the composite material can be used to enhance and reinforce bridges and buildings.

The invention provides a polyurethane resin composition, its preparation method, and using method of the same used as filling material of railway plate type dreg-free track convex block. The polyurethane resin composition is mainly used as filling material of railway plate type dreg-free track convex block, and mainly includes: polyether or polyester polyol, isocyanate or prepolymer of the same, pigment, filling and other auxiliary agent. Advantages of the prepared polyurethane resin are: construction manufacturability is better, bonding to cement of cured resin is good; the polyurethane resin is resistant of ultraviolet ray irradiation, moisture, heat, ageing and fatigue, and owns appropriate elasticity and integrated mechanical capability.

The invention relates to a high polymer used for controlling concrete cracks in building cement concrete engineering, effectively improving the toughness, impact resistance, bending resistance, bending resistance and impermeability of concrete, and inhibiting the cracking of the middle layer of asphalt roads and the generation of reflection cracks, etc. The production method of special-shaped plastic steel fiber. It uses polypropylene, polyethylene, polyester and other copolymers as the main raw materials, through advanced production technology and special treatment of fiber structure, to obtain rough surface, five-lobed, six-lobed and multi-lobed cross-section, and a cross-section of Concave-convex, wavy, zigzag shaped fibers. The fiber has high tensile strength, large elastic modulus, acid and alkali resistance, aging resistance, easy dispersion, light specific gravity, and firm combination with cement concrete and asphalt concrete.

The invention discloses a whitening cream and a preparation method thereof. The whitening cream is mainly prepared by compounding three whitening components, namely 1-methyl hydantoin-2-imide, a Bifida Ferment Lysate fermentation product lysate and carnosine, the synergistic whitening effect is achieved; the effects of whitening and removing freckles can be achieved; and sodium hyaluronate, allantoin, p-hydroxyacetophenone, EDTA disodium, nicotinamide, hydrogenated polyisobutene, caprylic/capric triglyceride, avocado butter, polydimethylsiloxane, citric acid, tranexamic acid and tocopheryl acetate are used as auxiliary materials, so that the whitening cream is capable of moisturizing and repairing skin, safe, free of side effects and comprehensive in effect.

The invention belongs to the technical field of high polymer materials and discloses a lignin/polyolefin thermoplastic elastomer composite and a preparation method thereof. The composite is prepared from components in percentage by mass as follows: 35%-95% of a polyolefin thermoplastic elastomer, 2%-60% of lignin, 0.5%-8% of an additive A and 0-5% of an additive B. The composite has the tensile strength ranging from 10 MPa to 35 MPa and the elongation at break ranging from 300% to 800%. With addition of lignin and the additives, a non-covalent bond connected energy sacrificial bond function is produced between the phase interfaces of the lignin and the polyolefin thermoplastic elastomer, which promotes dispersion of lignin in the polyolefin thermoplastic elastomer, the interfacial compatibility of the lignin and polyolefin is improved, breaking occurs under the action of external force before covalent bonds break, repeated breaking and reconstruction can be realized, the purpose of improving toughness is achieved, and the problem of poor mechanical performance due to poor compatibility of the lignin and polyolefin is solved.

The invention relates to a dual-redundancy valve device applied to a stratosphere aerostat. The dual-redundancy valve device is composed of an inner set of subsystem and an outer set of subsystem, namely, a main subsystem and an auxiliary subsystem, wherein the inner set of subsystem and the outer set of subsystem are symmetrical about a valve machine base. An inner valve cover corresponds to the main subsystem, and an outer valve cover corresponds to the auxiliary subsystem. The main structure of the dual-redundancy valve device comprises a dual-redundancy valve cover, transmission mechanisms and the valve machine base, and each valve cover corresponds to one set of transmission mechanism. Each transmission mechanism comprises a prime motor, a turbine, a worm and other main structures. All devices are installed on the valve machine base used for supporting all components and transmitting a load to a bag body. A feedback signal of a micro-switch can be used for feeding an in-place state of a valve back, and provide an outage basis. The opened angle of each valve cover is measured through rotation, and the measurement of the switching value is achieved. A pressure measuring air nozzle is used for measuring differential pressure of the bag body, and provides a basis for controlling. A hollow boss is arranged on the inner valve cover and can be cut down by a cutting device when failure happens, and reliability of the system is improved.

The invention provides a folding-type airport emergency repair and construction composite combination way panel and a manufacturing method thereof. The composite combination way panel is composed of asingle board and a connecting cloth. The veneer is a rectangular plate, which is laid side by side on the upper and lower surfaces of the connecting cloth, and the veneers on the upper and lower surfaces are symmetrically arranged; The veneer and the connecting cloth are bonded together by epoxy resin; Each veneer is made of composite fiber material, glass fiber cloth, ultra-high molecular weightpolyethylene fiber cloth and carbon fiber cloth. The composite pavement slab is light in material, the density is only 1.15-1.17, and the density is less than one sixth of ordinary steel plate. The bending strength of the panel is higher than 280MPa and the impact toughness is higher than 240K j/m2. The strength of the panel can satisfy the bearing capacity of the third generation fighter and allkinds of armed helicopters. The panel has the advantages of high bending strength, strong impact toughness, light material quality, large area, good anti-aging durability, simple and convenient repair pavement, time-saving and high efficiency of emergency repair, and can be used repeatedly.

The invention discloses a polyurethane foaming material which comprises the following raw materials in parts by weight: 50-65 parts of polyether polyol, 15-20 parts of isocyanate, 5-10 parts of low-temperature-resistant silicone rubber, 8-12 parts of modified attapulgite, 3-6 parts of a flame retardant, 1-3 parts of an antioxidant, 1-3 parts of a foaming agent, 5-8 parts of a chain extender, 1-3 parts of a benzotriazole anti-ultraviolet agent, 0.5-3 parts of a pigment, 5-10 parts of a filler and 2-4 parts of a plasticizer. The nano silicon dioxide is added into the foaming agent, so that the modification of the foaming agent on polyurethane is effectively improved, the toughness of the foamed foaming material is enhanced, and the foaming material has high wear resistance and tensile resistance. The foaming material prepared by adding the low-temperature-resistant silicone rubber in the preparation process has a relatively good low-temperature-resistant effect, the application range ofthe foaming material is enlarged, the anti-ultraviolet agent and the flame retardant are also added in the preparation process, the foaming material has relatively good ultraviolet radiation resistance and flame-retardant effect, and the service life of the foaming material is prolonged.

The invention relates to the field of organic silicon and provides anti-static organic silicon rubber and a preparation method thereof aiming to solve the problem that the organic silicon rubber does not have an antistatic property. The hardness of the prepared organic silicon rubber is 5-65 Shore A, the tensile strength is 0.2-0.8 MPa, the elongation at break is 40%-300%, and the organic silicon rubber has excellent antistatic property and is applied to packaging of electronic components.

The invention provides a double-component anti-corrosion coating which comprises a component A and a component B. The component A comprises the following components in parts by mass: 30-70 parts of epoxy resin, 10-15 parts of metal oxide and 10-35 parts of organic solvent; and the component B comprises the following components in parts by mass: 30-70 parts of polyamide resin. The polyamide resin can be dissolved in various solvents and also has good miscibility with the epoxy resin, the polyamide resin contains organic silicon, so that the polyamide resin has high reaction activity, after the polyamide resin is mixed with the epoxy resin, a cross-linking curing reaction can be carried out as long as a low temperature is reached, and therefore, the two-component anti-corrosion coating provided by the invention has good quick-drying property. In addition, the polyamide resin contains long carbon chains and polar groups, and after the polyamide resin is mixed with the epoxy resin, the adhesive force and toughness of the epoxy resin coating can be remarkably improved.

The invention provides a method for preparing high chlorinated polypropylene by a water phase suspension method, which comprises the following steps: adding deionized water, cracked polypropylene wax powder, an emulsifier and a dispersant into a reaction kettle for pre-dispersion and suspension, adding an initiator when a preset temperature is reached, starting to heat and introduce chlorine, controlling the chlorine introduction speed and the heating speed, obtaining the large-particle-size loosen chlorinated polypropylene through post-treatment. The high-chlorinated polypropylene obtained by the preparation method disclosed by the invention is better in dissolving property, lower in viscosity, high in adhesive strength and corrosion resistance, higher in drying speed and strong in salt spray resistance, and has a good application prospect.