40results about How to "Improve heat aging" patented technology

The disclosure relates to using metal acrylate compounds such as zinc diacrylate (ZDA), zinc dimethacrylate (ZDMA), among others for curing epoxy functional (and other cross-linking compounds), and to compositions containing such compounds for use in powder coat, film, adhesive, among other applications. ZDA and ZDMA containing compounds can cure the epoxy component of the compositions while being substantially free of conventional curing agents.

The tubular radiation absorbing device (1) for solar thermal applications has a central tube (2) and a glass tubular jacket (3) surrounding the central tube (2) so that a ring-shaped space (4) is formed between the central tube (2) and the tubular jacket (3). The ring-shaped space (4) contains at least one inert gas with a partial pressure of 3 to 200 mbar. Alternatively in another embodiment a gas-tight closed container (10) filled with at least one inert gas is arranged in the ring-shaped space (4). The container (10) has a device for supplying inert gas to the ring-shaped space (4) in order to compensate for increased heat losses due to diffusion of hydrogen into the ring-shaped space (4) from the heat carrier medium.

The invention discloses an intermediate pressure level low-smoke zero-halogen flame-retardant silicon rubber insulating material and a manufacturing process thereof. The material is characterized by being prepared from the following raw materials in parts by weight: 35-45 parts of methyl vinyl organic silicon rubber, 15-25 parts of white carbon black, 1.5-3 parts of nano-montmorillonite, 10-25 parts of aluminum hydroxide, 10-18 parts of magnesium hydroxide, 0.4-0.8 part of an across-linking agent, 2-5.8 parts of a structure control agent, 2-4 parts of iron oxide red and 0.80-1.5 parts of a coupling agent. The insulating material disclosed by the invention not only can satisfy the requirements on heat resistance, high electrical insulating performance and the like of an intermediate pressure level cable insulating material, a cable accessory and the like, but also has high mechanical strength, so that the novel application field of the silicon rubber material is opened up.

The disclosure relates to using metal acrylate compounds such as zinc diacrylate (ZDA), zinc dimethacrylate (ZDMA), among others for curing epoxy functional (and other cross-linking compounds), and to compositions containing such compounds for use in powder coat, film, adhesive, among other applications. ZDA and ZDMA containing compounds can cure the epoxy component of the compositions while being substantially free of conventional curing agents.

A method for determining the temperature of an electrically heatable catalytic converter having an electric heating element that includes a heating resistor, the electrical resistance of which changes as a function of the component temperature of the electrically heatable catalytic converter. This resistance is determined from the current intensity and the voltage at the electrically heatable catalytic converter, and is used to determine the component temperature of the catalytic converter, based on a characteristic curve stored in the control unit. The energization of the heating resistor for determining the component temperature takes place in each case for only a short time in order to minimize the energy input into the heating resistor and thus avoid overheating of the heating resistor. In addition, by use of the short time interval, the aim is to minimize the energy requirements for determining the component temperature of the electrically heatable catalytic converter.

The invention relates to a sunshine fabric with high oxygen index and a preparation method thereof, wherein the sunshine fabric comprises the following raw materials in parts by weight: 90-100 parts of PVC resin, 10-15 parts of chlorinated polyvinyl chloride, 5-25 parts of a phthalate plasticizer, 5-20 parts of a phosphate plasticizer, 7-10 parts of antimony trioxide, 10-15 parts of chlorinated paraffin, 0.5-7 parts of zinc hydroxystannate, 7-10 parts of decabromodiphenylethane, 5-8 parts of magnesium hydroxide, 0.5-1.5 parts of a composite ultraviolet absorber, 0.3-0.5 part of a lubricant, 1-1.5 parts of a processing aid, 0.3-0.4 part of an antibacterial agent, 3-5 parts of a heat stabilizer, and 1-10 parts of rutile titanium dioxide. The preparation method comprises the steps: blending the raw materials physically, melting by an extruder, coating PET protofilaments to obtain coated yarns, beaming, weaving, and carrying out heat setting to obtain the product. The prepared fabric has good properties of high flame retardancy, light resistance and thermal aging, and has good application prospects and research value.

The invention relates to a preparation method of flame-retardant halogen-free TPU sunscreen fabric. The preparation method comprises following steps: drying TPU and anti-sticking particles; physically blending dried TPU and fillers in proportion in order to obtain mixed TPU particles; melting obtained TPU particles via an extruder and coating TPU particles with PET original yarns in order to obtain coated yarns; and obtaining flame-retardant halogen-free TPU sunscreen fabric by warping, weaving and heat setting. The preparation method of flame-retardant halogen-free TPU sunscreen fabric has following beneficial effects: the obtained sunscreen fabric is high in flame retardance and antibacterial property, fine in anti-light aging property and anti-thermal ageing performance and is in accord with the environmental protection concept and has fine application prospect and great research value.

The invention relates to a preparation method of an anti-aging polyester film material. The preparation method comprises the following steps: preparing 0.1%-0.2% of W944, 0.1%-0.2% of UV329, 0.1%-0.2% of UV531, 0.4%-0.5% of zinc stearate, 0.4%-0.5% of zeolite, 0.05% of TiO2 and polyester; carrying out extrusion, film blowing and further stretching on the master batch to obtain an anti-aging polyester film; placing the polyester film in an aging environment with an ultraviolet light source, an infrared light source and a heat source for aging, acquiring an image of the polyester film, and sending the image into the neural network model for judging the anti-aging performance of the film and the consistency of the anti-aging performance; and optimizing the components, the proportion and the preparation process of the anti-aging polyester material master batch according to the judgment result. Therefore, the preparation process of the anti-aging polyester material can be optimized, and the polyester material with better light stability and heat stability is obtained.

An oxygen sensor includes a generally cylindrical casing. A detecting section is disposed at an axially one end side of the casing so as to detect a concentration of oxygen. Lead wires are electrically connected with the detecting section and outwardly extend through an axially other end side of the casing. A seal member is disposed inside an end section located at the axially other end side of the casing. The lead wires pierce the seal member. An insertion section is located at the axially one end side of the casing so that the detecting section projects over the insertion section. The insertion section is inserted into a through-hole formed in a wall of an exhaust pipe, so as to install the oxygen sensor to the exhaust pipe in a condition where the detecting section projects into the exhaust pipe. A ratio of a length of an outer projecting section of the oxygen sensor to a cross-sectional area of the insertion section inserted into the through-hole is set at a value not lower than a value at which a temperature in the seal member reaches a heat resistant temperature limit of the seal member.

The disclosure relates to using metallic acrylate compounds such as zinc diacrylate (ZDA), zinc dimethacrylate (ZDMA), among others for curing epoxy functional (and other cross-linking compounds), and to compositions containing such compounds for use in powder coat, film, adhesive, among other applications. ZDA and ZDMA containing compounds can also be supplied as an intermediate product that can cure the epoxy component of the compositions while being substantially free of conventional curing agents.

To improve the handlability and safety of a perchlorate solution used as a stabilizer for chlorine-containing resins. This invention provides a perchlorate solution of improved handlablity and safety and a method for heat-stabilizing chlorine-containing resin compositions by adding (a) 0.004 to 10 parts by weight of a perchlorate solution containing 1 to 60 % by weight of perchlorate, 5 to 50 % by weight of water-soluble organic solvent and 20 to 94 % by weight of water, and (b) 0.001 to 10 parts by weight of at least one silicate compound represented by the general formula (I) to 100 parts by weight of a chlorine-containing resin: M(O)a nSiO2mH2O (I) in which M is at least one metal selected from alkaline earth metals and aluminum, a is 1 when M is an alkaline earth metal and 3 / 2 where M is aluminum, n is from 1 to 5, and m is any positive integer.

The invention belongs to the technical field of sheathing materials for communication cables, and particularly relates to an environmental-friendly -40 DEG C resistant polyvinyl chloride (PVC) sheathing material for a 5G communication cable and a preparation method thereof. The PVC sheathing material is prepared from the components: 100-130 parts of PVC resin, 30-45 parts of nitrile rubber, 45-65parts of a plasticizer I, 10-20 parts of a plasticizer II, 5-15 parts of antimony trioxide, 20-30 parts of a flame retardant synergist, 3-7 parts of a composite stabilizer, 20-40 parts of calcium carbonate, 15-30 parts of kaolin, 1-2 parts of an anti-UV agent, 0.5-2 parts of an antioxidant, 1-3 parts of an impact modifier, 0.4-1 part of a lubricant and 0.3-0.6 part of an anti-copper agent. The environmental-friendly -40 DEG C resistant PVC sheathing material is good in flame retardant performance, low in temperature performance and good in UV resistance performance and mechanical performance.

The present invention relates to filled, impact-modified polycarbonate compositions containingA) aromatic polycarbonate and / or aromatic polyester carbonate,B) a first graft polymer ofB.1 from 0.1 to 30 wt. % of at least one vinyl monomer onB.2 from 99.9 to 70 wt. % of one or more graft bases having glass transition temperatures <10° C., the graft base consisting of at least 50 wt. % of a silicone rubber,C) a second graft polymer, which is different from component B, ofC.1 from 5 to 95 wt. % of at least one vinyl monomer onC.2 from 95 to 5 wt. % of one or more graft bases having glass transition temperatures <10° C., the graft base consisting of at least 50 wt. % of an EPDM rubber,D) rubber-free vinyl (co)polymer and / or polyalkylene terephthalate, andE) polymer additives,wherein components B and C are present in a ratio (B:C) in the range from 20:80 to 80:20 andwherein the composition containsfrom 10 to 92 parts by weight of component A,from 8 to 90 parts by weight of the sum of components B and C,from 0 to 35 parts by weight of component D, andfrom 0 to 30 parts by weight of component E,which have good stability to ageing and which are distinguished by high low-temperature strength and by low gloss, to a process for their production and to their use in the production of molded bodies.

The invention discloses a two-component acrylate structural adhesive and a preparation method thereof. The two-component acrylate structural adhesive comprises a component A and a component B, wherein the volume ratio of the component A to the component B is 10: 1. The component A comprises the following components by weight percent: 50%-75% of acrylate monomer, 20%-40% of toughening tackifier, 0.1%-3% of reducing agent, 0.1%-6% of stabilizer and 0.1%-10% of additive. The component B comprises the following components by weight percent: 20%-50% of oxidant, 20%-50% of plasticizer, 10%-20% of toughening agent and 0.1%-10% of additive.

The invention belongs to the technical field of high polymer materials, and discloses an alcoholysis-resistant heat-stable PPA composite material and a preparation method thereof. The alcoholysis-resistant heat-stable PPA composite material disclosed by the invention is prepared from the following components in parts by weight: 60 to 75 parts of PPA resin, 0.5 to 2 parts of an epoxy group pre-hydrolysis coupling agent, 1 to 4 parts of a heat stabilizer, 25 to 40 parts of chopped glass fibers, 0.1 to 0.4 part of a nucleating agent, 0.4 to 0.8 part of an antioxidant and 0.4 to 0.8 part of a lubricating agent. The material provided by the invention has excellent mechanical properties and processability, and can solve the problems of high water absorption, poor hydrolysis resistance, poor creep resistance, poor thermal stability, poor dimensional stability and the like of long carbon chain nylon reinforced materials used in the industries of automobiles, electric tools and electronics.

The invention discloses a manufacturing method for a sample for researching an inter-turn insulation aging process of a dry-type air-core reactor and a flake sample, and relates to a flake material sample and the manufacturing method. The method comprises the following steps: manufacturing flake polyester films; wiping the surfaces of the flake polyester films with alcohol, and performing drying treatment; forming a square opening and an outflow opening, and adhering two flake polyester films tightly without air bubbles; adding epoxy resin into the square opening dropwise; adhering the flake polyester films to the upper surface of the square opening; performing pressurizing and heating treatment on a composite insulating material sample; manufacturing a round sample. According to the sample, three square flake polyester films are adhered tightly; the square opening is formed in the central position of the second square flake polyester film, and the overflow opening is formed in the side of the second square flake polyester film, and an epoxy resin filling structure body is arranged in the square opening. The sample is applicable to various aging tests of thermal aging, electric aging, moisturizing, and mechanical vibration; space charge test and infrared spectral measurement can be performed on the sample.

The invention provides a PVC anti-aging waterproof roll. The PVC anti-aging waterproof roll comprises modified polyvinyl chloride, thermoplastic butadiene styrene rubber, stabilizer, epoxy resin, paraffin, sterol, antiager, pyrophylite powder, isophoronediisocyanate and polyhexamethylene phosphate. The invention further comprises a preparation method of the PVC anti-aging waterproof roll. The preparation method comprises an ultrasonic dispersion step, the power is 1350-1400 W, and the ultrasonic time is 3-5 min. According to the PVC anti-aging waterproof roll, the deformation resistance is high, the size change rate is 0.1-0.5%, the elongation at break is 510-550%, and tension reaches 1050-1025 N; and thermal ageing tension retention rate is 94.8-99.7%, the elongation retention rate is 90-95%, the bending property at low temperature is as low as -28 DEG C, crack is avoided, scratch and wear resistance is achieved, and the property is durable and stable.

The invention provides complex solvent modified liquid polysulfide rubber which is characterized in that the structural formula of the complex solvent modified liquid polysulfide rubber is shown at the upper right part (I). In the structural formula, n is equal to an integer between 1 and 8; X and X' are O or S; R1 and R1' are shown as (II) at the upper right part or -[-OCH2CH2CH2CH2-]m- or other polyether and polyester chain segments, wherein m is equal to an integer between 20 and 50; R2 and R2' are aromatic hydrocarbons, aliphatic hydrocarbons or lactone ring alkyls; and R3 and R3' are aliphatic alkyls, the carbon number of which, is between 2 and 11 or are main frameworks of the liquid polysulfide rubber [HS-R3(or R3')-SH] which contains sulfhydryl and is sold in the market. The complex solvent modified liquid polysulfide rubber has the advantages of good stability, no toxicity, no pollution, good elasticity, high temperature resistance, low temperature resistance, ultraviolet aging resistance, good oil resistance and the like. The preparation process has reasonable technical theoretical design and simple practical operation. Compared with the same industry, the invention also has the advantages of simple technology, environment protection, energy saving, reasonable cost, no discharge of the three wastes, no influence on environment and the like, and the recovery rate is 100%.