64results about How to "Inhibition of thermal degradation" patented technology

A polarizing element includes a transparent substrate, a reflective layer constituting, on the transparent substrate, grid-shaped convexities arrayed at a pitch smaller than a wavelength in a used optical bandwidth, a dielectric layer formed on the reflective layer, a diffusion barrier layer formed on the dielectric layer, and an absorbing layer formed on the diffusion barrier layer such that the diffusion barrier layer is sandwiched between the absorbing layer and the dielectric layer. This polarizing element has an excellent optical property and is able to prevent mixing of the absorbing layer and the dielectric layer under a high temperature.

The invention relates to a protective coating for a refractory material member of an ingot mold for continuous casting of metals, especially of steel, which consists of a dispersion of particles in a solvent, said particles including essentially boron nitride and at least one of the following metal oxides: zircon, zirconia, alumina and silica, the boron nitride representing between 20 and 50% by weight of said particles.

A manufacturing method of an organic light emitting device including a light emitting element that includes an organic light emitting layer, a sealing layer above the light emitting element, and a color filter layer above the sealing layer. The color filter layer includes a first color filter that transmits light of a first wavelength region and a second color filter that transmits light of a second wavelength region, an area of the second color filter is smaller than an area of the first color filter, and the method includes forming the first color filter, and forming the second color filter thereafter.

A rotatable fixing member includes an elastic layer, a primer layer provided on the elastic layer, and a parting layer provided on the primer layer. The primer layer contains a crystalline fluorocarbon polymer having a functional group and has a thickness of 850 nm or less. The parting layer is a coating layer of a crystalline fluorocarbon polymer.

A source gas generating device includes a liquid accommodation unit that accommodates therein the liquid source obtained by liquefying the solid source; a first energy feed unit that supplies energy to raise a temperature of a first region within the liquid accommodation unit to a melting point of the solid source; a second energy feed unit that supplies energy to raise a temperature of a second region within the liquid accommodation unit to a temperature higher than the temperature of the first region, the second region being distanced apart from the first region via a liquid flowing region; a solid source feed unit that supplies the solid source into the first region of the liquid accommodation unit; and an outlet port that discharges the source gas produced by the evaporation of the liquid source within the second region of the liquid accommodation unit.

The invention discloses bamboo charcoal profiled fiber with good product quality and low production cost, and a preparation method thereof. The fiber comprises the following components in percentage by weight: 94-99 percent of melt-spun slices, 1-6 percent of bamboo charcoal fine particles, 0.05-0.5 percent of surfactant and 0.1-1 percent of antioxidant, wherein the melt-spun slices are polyester, polyamide, polypropylene, polyethylene and modified polymers of polyester, polyamide, polypropylene and polyethylene; and the bamboo charcoal fine particles are black bamboo charcoal or white bamboo charcoal with the particle sizes of less than 2 mum. The preparation method comprises the following steps of: (1) preparing the bamboo charcoal fine particles according to a certain proportion, adding the surfactant and the antioxidant into a double-screw machine in a mixed conveying way, and directly putting the dried melt-spun slices into the hybrid double-screw machine; (2) melting and extruding the melt-spun slices in the double-screw machine, uniformly mixing the melt-spun slices with the bamboo charcoal fine particles and an aid, and conveying the mixture into a spinning box for direct spinning, by means of connection of a flange bent pipe; (3) spinning a blend melt with a spinning component from a spinneret plate, cooling, blowing and winding to obtain bamboo charcoal profiled nascent fibers; and (4) performing stretching twice and heat setting according to a continuous yarn or short yarn post-processing procedure. The invention is suitable for the bamboo charcoal profiled fiber and preparation thereof.

The invention discloses ageing resisting master batche for spinning polypropylene material and products and a preparation method for the ageing resisting master batche. The ageing resisting master batche is prepared from the following raw materials in parts by weight: 65-80 parts of polypropylene resin, 2-5 parts of a hindered phenol anti-oxidant, 3.5-6 parts of an auxiliary anti-oxidant, 8-17 parts of a light stabilizer, 3-6 parts of a dispersing agent, and 1-2 parts of a processing additive. The preparation method comprises the following steps: (1) mixing all the raw materials uniformly; (2) conducting melt extrusion and pelletization. The prepared ageing resisting master batche can effectively restrain the thermal degradation of polypropylene in a spinning manufacturing process, remarkably delays photooxidation aging and thermo-oxidative aging of spinning polypropylene products in outdoor using environment, remarkably prolongs the service life, and has the functions of improving the processability of resin, removing accumulation at die head and improving spinning efficiency.

Polymer compositions and methods for their preparation, as can be considered through the use of a unitary solid-state / melt extrusion extruder apparatus.

The invention discloses a polycarbonate composition for LDS with good thermal stability. The polycarbonate composition is prepared from the following components in parts by weight: 60-90 parts of polycarbonate, 2-30 parts of an LDS additive, 0.1-5 parts of a heat stabilizer and 0.3-3 parts of an antioxidant, wherein the antioxidant is prepared from a hindered phenolic antioxidant and a phosphite antioxidant, and the heat stabilizer is prepared from a metal compound, layered double-metal hydroxide and an ultraviolet absorbent. According to the polycarbonate composition disclosed by the invention, by virtue of optimization treatment on the content of each component, particularly combination use of the metal compound, the layered double-metal hydroxide and the ultraviolet absorbent and further combination use of the hindered phenolic antioxidant, the phosphite antioxidant and the heat stabilizer, the components take synergistic effect, thermal degradation of the polycarbonate composition for the LDS is greatly inhibited, the mechanical properties and the processability of the polycarbonate composition for the LDS are improved, and meanwhile, the polycarbonate composition for the LDS is capable of resisting precipitation, solvent extraction and salinization without influencing chemical plating in the formation process.

A rotatable fixing member includes an elastic layer, a primer layer provided on the elastic layer, and a parting layer provided on the primer layer. The primer layer contains a crystalline fluorocarbon polymer having a functional group and has a thickness of 850 nm or less. The parting layer is a coating layer of a crystalline fluorocarbon polymer.

An engine control device that can suppress thermal degradation of a particulate filter is provided. The device executes a fuel injection control module that restricts the supply of fuel by an injector if a fuel cutting condition is satisfied, an accumulation estimation module that estimates the accumulated amount of soot trapped in a GPF, and a regeneration control module that performs regeneration control for regenerating the GPF by burning soot if the accumulated soot amount exceeds a predetermined setting amount. A fuel cut prohibition line is set in advance and defines a prohibition temperature at which fuel cutting control is to be prohibited in accordance with the accumulated soot amount. The device further executes a prohibition control module that prohibits performance of fuel cutting control by the fuel injection control module if the temperature of the GPF is higher than the prohibition temperature.

The present invention relates to polyolefin antibacterial master batch, preparation thereof, and an application thereof for preparing an antibacterial polycondensate. The present invention is to produce a guanidine salt oligomer. By grafting the guanidine salt oligomer onto the molecular chain of polyolefin, the polyolefin antibacterial master batch is obtained to achieve long-time antibacterial and non-leaching purposes; then the polyolefin antibacterial master batch is subjected to melt blending with the polycondensate to prepare a long-acting antibacterial polycondensate. The antibacterialpolyester, or the antibacterial nylon, or the antibacterial polymer alloy prepared by the present invention has a non-dissolving, long-acting, and rapid antibacterial effect as compared with the priorart. The technical scheme is simple, flexible and easy to operate. By using the melt reaction and the melt blending method, the preparation process does not involve the use of a solvent; therefore, the method is non-polluting, non-toxic, environmentally friendly, and easy to be industrially produced on a large scale.

An accommodating space is formed on an end surface at a first axial end of a rear bracket so as to envelop an end portion region of a shaft, and a brush holder and a sensor unit are disposed in the accommodating space. A brush connector unit and a sensor connector unit are disposed so as to project out of the accommodating space, and electrical connection between brushes and the brush connector unit and signal connection between the sensor unit and the sensor connector unit are performed inside the accommodating space.

A high pressure tank structure includes a high pressure tank, a pressure relief device, and a heat-resistant plate. The high pressure tank is capable of storing a fluid on an inside of a resin-made liner covered with a reinforced layer. The pressure relief device, when heated to a certain activating temperature, reduces an internal pressure of the high pressure tank. The heat-resistant plate is integrally attached to the high pressure tank, so as to be disposed facing the reinforced layer which is positioned at least on a bottom surface side when mounted in a mounting body.

Isomerizing dehydration of feedstock containing a primary alcohol substituted in position 2 by an alkyl group in which the feedstock is heated to the reaction temperature by indirect heat exchange then vaporization by mixing with a diluent effluent, the diluted and vaporized feedstock being dehydrated in at least one dehydration reactor operating in gas phase at an inlet temperature comprised between 250 and 375° C., at a pressure comprised between 0.2 MPa and 1 MPa and at a WHSV comprised between 1 and 18 h−1, in the presence of a catalyst comprising a zeolite having at least one series of channels the opening of which is defined by a ring with 8 oxygen atoms (8MR) and a binder, the catalyst being coked beforehand in-situ or ex-situ, so as to produce a dehydration effluent, the latter being treated and separated into a diluent effluent, an alkenes effluent and a heavy hydrocarbons effluent.

The invention relates to an anti-tearing and anti-aging modified master batch. A formula of the anti-tearing and anti-aging modified master batch comprises the following ingredients in parts by weight: 15 to 25 parts of carrier resin, 70 to 80 parts of filling materials, 0.5 to 1 part of coupling agents, 2 to 4 parts of dispersing agents, 0.2 to 1 part of light stabilizers, 0.2 to 0.5 part of antioxidants and 0.2 to 1 part of graphene. The nanometer calcium carbonate or talc powder is used as filling materials; meanwhile, polyethylene, graphene, the light stabilizing agents and the antioxidants are added, so that the product has high anti-tearing performance, excellent UV-resistance effect and long service life; the heat degradation in the processing process can be effectively inhibited; the heat oxidization aging and light aging in the use process can be relieved; the anti-tearing and anti-aging modified master batch is applicable to plastic products such as polypropylene flexible freight bags, weaving bags and films with the anti-aging requirements.

A calender for a sheet of paper comprising a metal roll which is rotated by a first driving unit. The calender further comprises a rotatable cylindrical jacket, a pressurizing shoe, and a plurality of support members. The cylindrical jacket is disposed opposite the metal roll to form a calender nip so that the sheet of paper is continuously passed through the calender nip. The pressurizing shoe is provided within the jacket at the position of the calender nip and presses the interior surface of the jacket radially outward to pressurize the calender nip. The support members are disposed inside the jacket so that they are equally balanced in the peripheral direction of the jacket.

The invention relates to an environmental protective halogen-free inorganic nano-modified polyurethane electronic flame retarding film material. In order to overcome the problems of secondary harmful gas pollution etc. resulted from the burning of the existing halogen electronic flame retarding film, the invention synthesizes a new generation halogen-free environmental protective electronic flame retarding film by taking novel nano-inorganic silicate and phosphorous-nitrogenous compound as a flame retardant and taking polyurethane material as a structure. The halogen-free inorganic nano-modified polyurethane electronic flame retarding film material includes 20-60 part by weight of pre-polymerized material of the inorganic nano-modified polyurethane, 4-10 part by weight of micromolecule polyhydric alcohol, 0-10 part by weight of vegetable oil, 0.01-1 part by weight of antioxidant, 0-5 part by weight of plasticizer, 30-50 part by weight of phosphorus-nitrogen flame retardant, and 0-5 part by weigh of color paste. The halogen-free inorganic nano-modified polyurethane electronic flame retarding film has the characteristics of non-toxicity, low smoke and high efficiency during burning at high temperature, thus meeting the requirements of environmental protection.

The invention relates to a preparation method of organic montmorillonite for a polyolefin composite material, and belongs to the deep processing technical field of the montmorillonite. The preparation method is characterized by comprising the steps of modifying montmorillonite by using short-chain organic cation quaternary ammonium salt; carrying out high-speed stirring reaction with nano silicon dioxide at the same time; and finally, centrifuging, drying and crushing, wherein adding amount of the organic cation quaternary ammonium salt is 0.8-1.2 times exchange capacity of the montmorillonite cations, and the adding amount of the silicon dioxide is 5%-20% the weight of the montmorillonite. According to the preparation method, intercalation of the montmorillonite is firstly carried out by using organic cations to change polarity of the organic montmorillonite and increase compatibility with the polyolefin material; meanwhile, the montmorillonite is compounded with nano silicon dioxide, so that interlayer spacing of the montmorillonite is further expanded, thermal degradation of organic cations can be restrained, color requirements of the composite material are satisfied, and therefore, the preparation method can be effectively used for the organic montmorillonite powder of the polyolefin material.

The invention relates to a degradable temporary plugging ball suitable for underground fracturing operation. The degradable temporary plugging ball comprises the following raw material components in parts by weight: 70-90 parts of polyglycolic acid, 10-30 parts of a flexible degradable resin, 4-8 parts of a compatilizer, 2-5 parts of a plasticizer, 0.5-2 parts of a chain extender, 15-30 parts of a functional filler, 0.2-1.6 parts of an antioxidant, 2-4 parts of a heat stabilizer and 0.1-1 part of an anti-hydrolysis agent. Compared with the prior art, the polyglycolic acid and the flexible degradable resin are compounded, and the functional filler is supplemented, so that the material system has relatively high mechanical strength and certain flexibility, the heat-resistant stability of the material system can be effectively improved, and the prepared temporary plugging ball can still keep relatively stable plugging and pressure-bearing effects under a high-temperature condition, and has good degradability.

An internal-combustion engine of the invention includes a catalyst which has an oxidizing ability and is provided in an exhaust passage, wherein an air / fuel ratio of an air / fuel mixture is controlled so that the air / fuel ratio leaner than a theoretical air / fuel ratio and the air / fuel ratio richer than the theoretical air / fuel ratio are alternated with a predetermined amplitude with respect to a target air / fuel ratio. On the assumption that the temperature of the catalyst is referred to as a catalyst temperature, an amplitude set according to the catalyst temperature is adopted as the predetermined amplitude, and the amplitude set when the catalyst temperature is higher than a predetermined temperature is smaller than the amplitude set when the catalyst temperature is lower than the predetermined temperature.

An internal-combustion engine of the invention includes a catalyst which has an oxidizing ability and is provided in an exhaust passage, wherein an air / fuel ratio of an air / fuel mixture is controlled so that the air / fuel ratio leaner than a theoretical air / fuel ratio and the air / fuel ratio richer than the theoretical air / fuel ratio are alternated with a predetermined amplitude with respect to a target air / fuel ratio. On the assumption that the temperature of the catalyst is referred to as a catalyst temperature, an amplitude set according to the catalyst temperature is adopted as the predetermined amplitude, and the amplitude set when the catalyst temperature is higher than a predetermined temperature is smaller than the amplitude set when the catalyst temperature is lower than the predetermined temperature.

The invention relates to an anti-aging master batch and belongs to the field of chemical engineering formulas. The anti-aging master batch is composed of following raw materials, by weight, 20-30 parts of polyethylene, 20-40 parts of polypropylene, 20-30 parts of a photo-stabilizer, 5-20 parts of a filler, 1-2 parts of a dispersing agent and 2-4 parts of a coupling agent. The anti-aging master batch is greatly improved in use performance, has excellent social and economical benefit, is suitable for polypropylene flexible freight bags or woven bags having anti-aging requirement, can effectively inhibit thermo-degradation of polypropylene in processing, and delaying thermo-oxidative aging and photo-aging during use.

The invention discloses a polycondensation catalyst for polyester synthesis and a preparation method and application thereof. The preparation method comprises the following steps: carrying out homogeneous blending on a Ti<3>C<2>T<x>MXene material and a benzoxazine monomer to obtain a blend, then carrying out heating for curing treatment to obtain a Ti<3>C<2>T<x>MXene / benzoxazine resin composite material, and finally, irradiating the Ti<3>C<2>T<x>MXene / benzoxazine resin composite material with laser to prepare the polycondensation catalyst for polyester synthesis. The prepared polycondensation catalyst for polyester synthesis has high catalytic activity, and polyester with higher molecular weight can be obtained through polycondensation polymerization within shorter time, so the tensile modulus, tensile strength and other mechanical properties of polyester are improved. In addition, side reactions such as raw material diacid decarboxylation and thermal degradation of polyester can be inhibited by shorter polymerization time, so the obtained polyester has better hue. Moreover, LIG in the polyester can increase the crystallization rate of the polyester and enhance the conductivity of the polyester, so a polyester product is endowed with antistatic performance.

The invention discloses a PVC (polyvinyl chloride) composite material for bags and suitcases. The PVC composite material is prepared from the following raw material ingredients in parts by weight: 80to 95 parts of PVC, 0.9 to 3 parts of stabilizing agents, 0.5 to 3 parts of lubricating agents and 1 to 9 parts of processing aids, wherein the processing aid is sucrose tribehenate. The PVC compositematerial has the following advantages and effects that the raw materials of the PVC composite material include the processing aid of sucrose tribehenate, so that the elimination reaction of micromolecules without main chain fracture during the PVC thermal degradation can be inhibited; secondly, the tribehenate in the PVC composite material can take a synergistic interaction effect with the sucrose tribehenate; the thermal degradation of the PVC is further inhibited; thirdly, tetramethylol acetylenediurea in the PVC composite material can inhibit the light degradation of the PVC; the effects of good anti-aging performance, high weather resistant performance and long service life are achieved.

The invention discloses a novel polyformaldehyde composite material. The novel polyformaldehyde composite material is prepared through the following steps of (1) weighing out and feeding, by weight part, 100 parts of POM (polyoxymethylene), 10-20 parts of modified filler, 10-26 parts of heat stabilizer and 0.1-1 part of lubricant into a high-speed mixer for mixing at normal temperature for 5-10 min to obtain a mixed material; (2) feeding the mixed material into a double-screw extruder for melting, extrusion and pelletizing. The modified filler is prepared by compounding zinc oxide whisker, mica and zirconium oxide at a weight ratio of 1:4:2; the heat stabilizer is prepared by compounding beta-(3, 5-di-tert-butyl-4-hydroxybenzyl) n-octadecanol propionate and attapulgite. The prepared novelpolyformaldehyde composite material is excellent in mechanical performance, wear resistance and heat resistance.

The invention discloses a synthetic method for a flame-retardant unsaturated polyester resin raw material applied to a glass fiber-reinforced plastic septic tank. The synthetic method comprises the following steps: uniformly mixing unsaturated diacid or an acid anhydride, saturated diacid or acid anhydride and dihydric alcohol, heating the obtained mixture under the protection of nitrogen gas until a molten state is reached, continuing heating, performing a stirring reaction until the acid value of a system is lower than 25 mgKOH / g, and lowering temperature to obtain an unsaturated polyester prepolymer; and sequentially adding phosphorus-containing vinyl monomer, a polymerization inhibitor and an initiator into the unsaturated polyester prepolymer, and carrying out cooling to room temperature so as to obtain the unsaturated polyester resin raw material. With the synthetic method for the flame-retardant unsaturated polyester resin raw material applied to the glass fiber-reinforced plastic septic tank in the invention, the synthesized unsaturated polyester resin raw material is effectively improved in flame retardancy while maintaining excellent processability and mechanical properties.

The invention discloses reaction type flame-retardant unsaturated polyester resin for a glass fibre reinforced plastic matrix. The reaction type flame-retardant unsaturated polyester resin is preparedfrom the following raw materials in parts by weight: 20-30 parts of maleic anhydride, 10-20 parts of phthalic anhydride, 10-20 parts of DOPO-MA, 5-15 parts of glycol, 10-20 parts of propylene glycol,25-35 parts of diethylene glycol, 15-25 parts of a phosphor-containing vinyl monomer, 0.02-0.2 part of a polymerization inhibitor and 0.1-1 part of an initiator. The reaction type flame-retardant unsaturated polyester resin for glass fibre reinforced plastic matrix further can effectively improve flame resistance while keeping excellent processability.