34results about How to "Raise the degradation temperature" patented technology

The invention discloses a PVC foaming wood plastic composite material which is produced by processing the raw materials based on the parts by weight: 100 parts of polyvinyl chloride (PVC), 40-50 parts of lignified plant fiber, 10-20 parts of active light calcium, 3-6 parts of calcium zinc complex stabilizer, 1-3 parts of compound-type foaming agent, 0.5-1.5 parts of lubricating agent OPE wax, 0.5-1 part of compound lubricating agent and 3-8 parts of foaming conditioning agent; the raw materials are evenly mixed by a mixing machine and then are directly put into a screw extruder to be extruded and molded at the temperature of 160-170 DEG C. The PVC foaming wood plastic composite material is added with full dose of heat stabilizer in the process of blending and processing, so that the degradation temperature of plastics can be increased, thermal degradation of the plastics and carbonization of wood powder in the process of mixing and forming can be prevented, and the operation of extruding and molding can be completed in one step, thus greatly simplifying the production technique and reducing the production cost.

A soy protein/montmorillonite nanometer composite material, its production and use are disclosed. The material consists of montmorillonite 1~24wt% and soy protein 76~99wt%. The process is carried out by dispersing montmorillonite and soy protein in water proportionally, agitating the two soliquoids while blending, drying to obtain soy protein/montmorillonite nanometer composite, adding into glycerine, mixing by extruder and hot pressing to obtain plastic sheet material. It is simple, has excellent mechanical, thermal, ultraviolet absorbing performances and no environmental pollution. It can be used for optical selectivity and biological degradable material.

The invention relates to the field of polymer materials, and specifically relates to a low-odor environmentally-friendly polyvinyl chloride (PVC) composite material. The composite material at least comprises the following components in parts by weight: 80 to 110 parts of polyvinyl chloride resin, 4 to 12 parts of chlorinated polyethylene, 8 to 20 parts of butyl etherified urea-formaldehyde resin, 15 to 40 parts of plasticizer, 4 to 10 parts of benzhydrazide derivatives, 0.1 to 0.8 part of lubricant, 0.5 to 3 parts of fire retardant, 1 to 3 parts of vermiculite powder, and 1 to 3 parts of montmorillonite; wherein the weight-average molecular weight of the polyvinyl chloride resin is in a range of 60000 to 120000, the plasticizer is a citrate plasticizer, and the lubricant is a fatty acid or metal soap lubricant.

The invention relates to a production method of a 5 type PVC (poly vinyl chloride) resin foamed wood plastic composite. The comprises the following raw materials in parts by weight: 100 parts of 5 type PVC resin, 40-85 parts of wood fibers, 4-5 parts of a stabilizer, 0.2-1 part of a foaming agent, 4-5 parts of a foaming regulating agent, 2-3 parts of a modifier, 0.2-0.3 part of a lubricating agent and 20 parts of light calcium carbonate. The preparation method comprises the following steps of: (1) mixing the raw materials, namely stirring and mixing the raw materials by adopting a 800/2500 type mixer; and (2) carrying out extrusion moulding, namely feeding the uniformly mixed material in the step (1) into a 65 type double-screw wood plastic moulding machine to be extruded and moulded. The production method has the advantages that the raw material ratio is reasonable, a dustfree compound stabilizer is added to increase a plastic degradation temperature and prevent materials from carbonization in a production process, extrusion moulding can be carried out by adopting a one-step method of the double-screw extruder, and foaming ratio, surface hardness and glossiness of the 5 type PVC resin foamed wood plastic composite product are consistent with those of SG-7 and SG-8 type PVC products.

The invention belongs to the field of photoelectric materials, and discloses a non-aromatic amine small molecule photoelectric material and preparation and application thereof. The non-aromatic aminesmall molecule photovoltaic material has a structural formula as shown in the formula (I). In the formula, R1 is selected from H or -CH3; and R1, R2, R3, and R4 are independently selected from S or O.The non-aromatic amine small molecule photoelectric material of the invention has good hole transport ability, can be applied to a hole transport layer of an organic photoelectric device, and can also be combined with a common electron transport type material to generate an exciplex for luminescence, exhibits high fluorescence quantum yield and exhibits the property of thermally activated delayedfluorescence.

The invention relates to a fan blade and a preparation method of the fan blade. The centrifuging fan blade is prepared through injection moulding from the following materials by mass percent: 75-85% of ABS, 10-20% of glass fiber, 1.0-2.0% of aramid fiber, 0.1-1.5% of a silane coupling agent DB792, 0.1-1.5% of a silane coupling agent kh560, 0.2-2.0% of a cyclic anhydride type compatilizer, 0.5-1.0% of ethyoxyl lauramide, 0.2%-1.0% of antibacterial agent ECOFRESH, 0.5-2.0% of microcrystalline wax, 0.5-3.0% of EVA, 0.5-2.0% of a halogen-free flame retardant, 0.5-2.0% of antioxygen, 0.1-1.0% of a light stabilizer, and 0.1-1.0% of a heat stabilizer. The centrifuging fan blade has the higher performances of heat resistance, resistance to chemical attack, ageing resistance, mildew prevention, protection from ultraviolet rays and the like, is high in density and hardness and small in size deformation, and improves the tensile strength of a plastic material.

The invention discloses a modified polypropylene plastic, which comprises the following raw materials in parts by weight: 80-150 parts of PP, 3-12 parts of POE, 1-9 parts of grafted EVA, 1-5 parts ofa mixture of silicone powder and PE wax, 5-30 parts of calcium carbonate and 2-15 parts of a flame retardant. The modified polypropylene plastic is prepared by adding the silicone powder, so that themechanical property of the polypropylene plastic is improved, and the toughness of the polypropylene plastic is improved; the silicone powder and the PE wax are compounded to achieve a synergistic effect, so that the mechanical property of the polypropylene plastic is further improved.

The invention discloses a waterproof ceramicized silicon rubber material comprising a ceramic-forming filler, silicone rubber, silicone oil, boron oxide, a coupling agent and a vulcanizing agent; andthe ceramic-forming filler comprises silicon powder, mica and silicon dioxide. A preparation method comprises the following steps: (1) grinding the silicon powder, mixedly grinding the silicon powderand other ceramic-forming filler components, and drying to obtain the pretreated ceramic-forming filler; (2) blending all components excluding the ceramic-forming filler and the vulcanizing agent, mixing and performing mixing under vacuum to obtain organosilicone rubber compound; (3) mixing the pretreated ceramic-forming filler with the organosilicone rubber compound; and (4) adding the vulcanizing agent for mixing. The waterproof ceramicized silicone rubber has good mechanical properties at normal temperature, and has a low ceramic-forming temperature to avoid cracking at ambient temperatureof 300 to 400 DEG C, so that a ceramic body transformed after ceramic-forming has a dense structure and good waterproof performance. The waterproof ceramicized silicon rubber material can be used in acable gland with a refractory layer made of the waterproof ceramicized silicon rubber material, and the cable gland is mechanically stable and still has water resistant at high temperature.

The invention discloses an ultraviolet curing adhesive with high temperature resistance and a preparation method of the ultraviolet curing adhesive, and belongs to the technical field of preparation of photocuring materials. The technical problems that an existing ultraviolet curing adhesive cannot keep the adhesive performance under the high-temperature condition and is prone to falling off in the production process are solved. The ultraviolet curing adhesive comprises an acrylate prepolymer, an active monomer, a photoinitiator and an auxiliary agent. Wherein the acrylic acid prepolymer is a mixture of organic silicon modified acrylate and methacrylate type liquid isoprene rubber. According to the invention, a manner of modifying acrylate is adopted, a group structure with high temperature resistance is introduced into an acrylate prepolymer, and the modified acrylate and methacrylate isoprene are blended according to a certain proportion, so that the prepolymer with excellent high temperature resistance is prepared; by optimizing the formula, the ultraviolet curing adhesive which can still keep good adhesive performance in a high-temperature environment is obtained.

The invention relates to a fan blade and a preparation method thereof. An axial impeller is prepared from the following materials in percentage by mass through injection molding: 75 to 90 ppercent of AS (Acrylonitrile-Styrene), 15 to 20 percent of glass fiber, 1.0 to 5.0 percent of carbon fiber, 5.0 to 15 percent of mica, 0.1 to 1.5 percent of silane coupling agent kh 560, 0.1 to 1.5 percent of silane coupling agent KBM 403, 0.2 to 2.0 percent of cyclo-anhydride type compatilizer, 0.5 to 1.0 percent of ethoxylated lauramide, 0.2 to 1.0 percent of antibacterial agent ECOFRESH, 0.5 to 2.0 percent of microcrystalline paraffin, 0.5 to 3.0 percent of EVA (Ethylene-Vinyl Acetate), 0.5 to 2.0 percent of halogen-free flame retardant, 0.5 to 2.0 percent of antioxidant, 0.1 to 1.0 percent of light stabilizer and 0.1 to 1.0 percent of thermal stabilizer. The axial impeller disclosed by the invention has higher properties of heat resistance, chemical corrosion resistance, aging resistance, mildew resistance, ultraviolet radiation resistance and the like, the density is high, the hardness is high, the size deformation is small, and the tensile strength of a plastic material is increased.

The present invention discloses a method of improving the thermal stability of poly-3-hydroxybutyrate (PHB). The thermal stability of PHB was improved by grafting maleic anhydride (MA) onto the PHB through various processes. It has been proved that purified grafted PHB had a higher degradation temperature, a better thermal stability than the pristine PHB, and was not easy to decrease molecular weight by heat treatment. At the same time, the crystallization rate, the melting temperature and crystallinity were all increased. The MA was effectively grafted onto PHB by processes of solution grafting, melt grafting, mechanical grafting methods and so on. The grafting degree of MA was changed with the increasing amounts of the initiator and MA. The degradation temperature of the PHB was significantly increased by MA grafting because the degradation was blocked in the formation of six-member ring by the steric hindrance of the grafted MA. The PHB grafted with the mechanical grafting method was not easy to generate scission degradation during reaction, and showed the best thermal stability and forming ability. The initial degradation temperature of PHB was increased at least 50° C.

The invention discloses a mechanical seal chemical pump and a using method thereof. The mechanical seal chemical pump comprises a mounting base, two fixing bolt plates are fixedly mounted on each of the front surface and the rear surface of the mounting base, a first supporting frame is fixedly mounted at the position, close to one end, of the upper surface of the mounting base, a second supporting frame is fixedly mounted at the position, close to one side of the first supporting frame, of the upper surface of the mounting base, driving motors are fixedly mounted at the upper ends of the first supporting frame and the second supporting frame, and a third supporting frame is fixedly mounted at the side, close to the second supporting frame, of the upper surface of the mounting base. An impeller has the advantages of high heat resistance, chemical corrosion resistance, aging resistance, mildew resistance, ultraviolet radiation resistance, high density, high hardness and small size deformation, the tensile strength of the plastic material is increased, the durability of the impeller is improved, the service life of a chemical pump is prolonged, a pump cover, a first cylinder and a second cylinder are mechanically sealed, and the sealing performance and the suction force of the chemical pump are improved.

The invention relates to the field of accessories of air conditioning equipment. A filter screen panel for an air conditioner is prepared through injection moulding from the following materials by mass percent: 70-90% of ABS, 10-30% of glass fiber, 1.0-5.0% of carbon fiber, 0.1-1.5% of silane coupling agent DB792, 0.1-1.5% of silane coupling agent kh560, 0.2-2.0% of cyclic anhydride type compatilizer, 0.5-1.0% of ethyoxyl lauramide, 0.2%-1.0% of an antibacterial agent ECOFRESH, 0.5-2.0% of microcrystalline wax, 0.5-3.0% of EVA, 0.5-2.0% of halogen-free flame retardant, 0.5-2.0% of an antioxygen, 0.1-1.0% of a light stabilizer, and 0.1-1.0% of a heat stabilizer. The filter screen panel for the air conditioner has the higher performances of heat resistance, resistance to chemical attack, ageing resistance, mildew prevention, protection from ultraviolet rays and the like, is high in density and hardness and small in size deformation, and improves the tensile strength of a plastic material.

The present invention relates to a livestock carcass disposal facility using aerobic thermophilic microorganisms and a burial disposal method. The present invention relates to a livestock carcass disposal facility and a burial disposal method, wherein the nano-bubble oxygen water is used when livestock carcasses are disposed of, and thus the air supply from the outside is not required at the initial time of carcass decomposition, thereby preventing the release of various animal pathogenic bacteria remaining in the livestock carcasses, especially, avian influenza, and viruses causing foot-and-mouth disease, into the air, and does not only suppress the generation of leachate and odor derived from the livestock carcasses but can also reduce the management period and maximize the land availability through economical and prompt decomposition.