42results about How to "Excellent water vapor resistance" patented technology

Provided is a photosensitive composition for volume hologram recording capable of forming a volume hologram recording medium that less shrinks upon curing in hologram recording (in hologram formation) and resists cracking. The photosensitive composition for volume hologram recording contains an alicyclic epoxy compound (A) represented by Formula (I); a thermal acid generator (B); a radically polymerizable compound (C); a radical polymerization initiator (D); and at least one epoxy compound (E) selected from the group consisting of compounds represented by Formula (1), epoxidized fatty acid esters, and epoxidized conjugated diene polymers.

The invention relates to a cosmetic composition, and especially relates to a hair fixing composition, its application in hair fixing, and its use method. The composition includes special polyurethane and an amphoteric copolymer. Compared with cosmetic compositions in the prior art, the cosmetic composition provided by the invention has the advantages of curling maintenance under high humidity, high elasticity, easy washing and comfortable hair feeling.

The invention discloses a corrosion-resistant cable material and a preparation method thereof. The corrosion-resistant cable material is prepared from the following raw materials in parts by weight: 30-45 parts of fluorinated silicone rubber, 15-25 parts of ethylene propylene diene monomer rubber, 18-30 parts of an ethylene-vinyl acetate copolymer, 6-12 parts of glass fiber, 10-20 parts of flame retardant, 4-10 parts of an anti-aging agent, 12-25 parts of a softening agent, 1-3 parts of an antioxidant, 3-8 parts of a plasticizer and 2-6 parts of a cross-linking agent. The corrosion-resistant cable material is high in toughness and high in corrosion resistance.

The invention discloses a high-speed rail rubber microporous cushion and a manufacturing method thereof. The high-speed rail rubber microporous cushion which is composed of the following components in percentage by mass: 25-50% of synthetic rubber, 16-26% of reinforcing agent, 19-27% of filler, 1.2-2.4% of activator, 10-12% of plasticizer, 2.5-3.5% of foaming agent and 1.0-1.5% of crosslinking agent. The manufacturing method comprises the following steps: (1) compounding; (2) discharging; and (3) vulcanizing. The manufacturing method is simple. The prepared high-speed rail rubber microporous cushion has the advantages of favorable mechanical properties, excellent heat resistance, excellent aging resistance and excellent water resistance, and is suitable to be used under different climatic conditions in different areas.

The invention relates to a denitration treatment method of flue gas discharged by an ethylene cracking furnace. The flue gas sequentially flows a radiation section, a convection heat exchange sectionA, an ammonia injection grid, a convection heat exchange section B, an SCR denitration reaction section and a convection heat exchange section C, and the SCR denitration reaction section is filled with a catalyst. A preparation method of the catalyst includes the steps: (1) adding carbon black powder and cerium nitrate into silicon-containing ethanol solution, uniformly mixing materials under thecondition of ultrasonic dispersion, separating solid and liquid, and drying a solid phase to obtain silicon and cerium modified carbon black powder; (2) adding the modified carbon black powder in titanium-containing ethanol solution, adding dilute nitric acid solution to form sol-gel, treating the sol-gel at high temperature in anaerobic atmosphere, and calcining the treated sol-gel in oxygen containing atmosphere to obtain a silicon-cerium-containing macro-porous titanium dioxide carrier; (3) mixing the titanium dioxide carrier, a molecular sieve and an active component precursor to form a honeycomb denitration catalyst. The method is good in denitration activity and high in water-vapor-resistant capability, and the catalyst cannot be easily cracked and long in service life.

The invention relates to a navigation device in an orthopedics department and a preparation method of the navigation device. A first movable arm and a second movable arm of the navigation device in the orthopedics department are made of modified polyphenylene oxide plastic which comprises polyphenyl ether, polybutylene, HIPS, LDPE, titanium dioxide, an interfacial modifying agent, a toughening modifying agent, glass fiber, antioxygen and a toner. The preparation method comprises the steps of firstly, conducting forced air drying on polyphenyl ether, polybutylene and HIPS, adding raw materials into a charging barrel after the charging barrel in a high-speed injection molding machine is heated, heating the raw materials into the molten state, then injecting the raw materials to a preheated first movable arm mold and a preheated second movable arm mold in twice through nozzles of a hot flow pass, obtaining the first movable arm and the second movable arm through pressure maintaining, cooling forming and mold opening, and assembling the first movable arm and the second movable arm with other components to form the navigation device in the orthopedics department. The obtained navigation device in the orthopedics department is compact and perfect in whole structure, good in toughness and light in total mass, and the strength of the movable arms is high.

The invention relates to the field of cables, and particularly relates to a flame-retardant polyvinyl chloride insulation shielding control cable material which is prepared from the following components in parts by weight: 55 to 80 parts of modified polyvinyl chloride, 25 to 50 parts of chlorinated polyvinyl chloride, 10 to 20 parts of a flame retardant, 15 to 30 parts of an electromagnetic shielding material, 1 to 6 parts of a lubricating agent and 0.05 to 0.5 part of an antioxidant. The material solves the problem that the traditional insulating cable material or shielding cable material haslower flame retardancy, is easy to ignite in case of fire and is very unsafe and then a cable material with insulating and shielding functions and better flame retardancy is urgently needed. The flame-retardant polyvinyl chloride insulation shielding control cable material comprises modified polyvinyl chloride, chlorinated polyvinyl chloride, a flame retardant, an electromagnetic shielding material, a lubricant and an antioxidant, and through the cooperative use of the components, the finally obtained cable material has excellent insulation, shielding resistance and flame retardancy.

The invention discloses an environment-friendly, high-temperature-resistant and anti-shielding industrial control cable, comprising a cable body that includes conductors, an insulating layer, a shielding layer, an inner sheath and an outer sheath. The conductor is arranged inside the cable body; the section of the conductor is circular in shape; a copper foil layer is extruded outside the conductor; the insulating layer is tightly extruded outside the copper foil layers; the gap part between the insulating layer and the copper foil layers is filled with fillers; the shielding layer is tightly extruded outside the insulating layer; a plurality of uniformly arranged drainage cores are arranged inside the shielding layer; a resin bonding layer is arranged between the shielding layer and the insulating layer; a metal coating is arranged on the outer surface of the shielding layer; a reinforcing layer and a refractory layer are arranged outside the metal coating from inside to outside; the inner sheath is arranged on the outer surface of the refractory layer; the outer sheath is tightly extruded on the surface of the inner sheath. The environment-friendly, high-temperature-resistant and anti-shielding industrial control cable has the advantages of reasonable structural design, long service life and good shielding resistance.

The invention relates to the technical field of new energy sources, in particular to a high-density film for a solar battery back sheet. The high-density film for a solar battery back sheet comprisesthe components as follows: 5-10 parts of butyl rubber, 20-32 parts of polyvinylidene fluoride PVDF, 10-15 parts of methacrylate-butyl methacrylate copolymer, 4-10 parts of dipropylene glycol, 1-10 parts of methyl isobutyl ketone, 5-10 parts of silver paste, 5-15 parts of silica, 5-8 parts of polyetherimide, 1-9 parts of dimethylamino methylphenol, 5-10 parts of carboxymethylcellulose, 2-5 parts ofpolytrimethyldihydroquinoline, 0.2-1.0 parts of antioxidant DLTP, 2-8 parts of hindered amine light stabilizer and 0.5-1.5 parts of dioctyl ester. The silver paste includes terpineol, butyl diglycolacetate and tributyl citrate in a ratio of 2:2:3. The high-density film for a solar battery back sheet is resistant to heat, resistant to aging, good in water vapor resistance effect, high in weldingtension and good in photoelectric performance.

The invention discloses a three-cylinder direct-current miniature pump which is characterized by comprising a silencing cover (1), an upper cover (2), umbrella heads (3), cylinders (4), a middle cover (5), an eccentric frame (6), a lower cover (7), an eccentric seat assembly (8) and a driving motor (9). The three-cylinder direct-current miniature pump has the advantages that media of the three-cylinder direct-current miniature pump can be pure water or solution with certain acid-base properties, so that service requirements of small household electric appliances and medical equipment can be met; the cylinders of the three-cylinder direct-current miniature pump are in vertical check valve integral designs, are compact in structure and small in size, are integrally formed by dies, and accordingly the integral pump is compact in structure and low in cost; a pump body is thoroughly isolated from the motor by the aid of a totally closed structure, so that the extracted working media are prevented from being in contact with the motor, the liquid cannot seep into the motor to damage the motor, a motor protecting effect is realized, and the service life of the motor is prolonged.

Belonging to the technical field of high polymer materials, the invention relates to a lightweight wear-resistant material for mobile phone rear covers, which comprises 50-60 parts of polycarbonate, 20-30 parts of ethylene propylene diene monomer compound, 20-30 parts of polyethylene and 12-16 parts of inorganic mixture. The preparation method comprises the following steps: weighing the raw materials, heating the weighed raw materials to 260-280 DEG C, uniformly mixing to obtain a mixture, and carrying out injection molding and cooling demolding under the pressure of 150-170MPa to obtain the light wear-resistant material for the mobile phone rear cover. The inorganic mixture, the aluminum nitride fibers and the basic magnesium sulfate crystals are added to cooperate with one another, so that the thermal conductivity and the strength of the material for the mobile phone rear cover are improved, and the service life of the material is prolonged. The aluminum nitride fibers and the basic magnesium sulfate whiskers are treated by a silane coupling agent, and the graphite reinforcing agent contains modified silicone oil, so that the compatibility between an inorganic mixture and a polymer base material is improved; the product can be endowed with good scratch resistance.