215results about How to "Improve aging resistance" patented technology

The invention relates to an anti-yellowing automobile composite film and a preparation method thereof, and belongs to the technical field of high polymer materials. The yellow-resistant automobile composite film is prepared from the following components in parts by weight: 60 to 70 parts of PVC (Polyvinyl Chloride) master batch, 10 to 20 parts of TPU (Thermoplastic Polyurethane) master batch, 1 to 2 parts of plasticizer, 0.5 to 0.8 part of flatting agent, 0.1 to 2 parts of yellowing-resistant modifier and 0.1 to 2 parts of modified flame retardant, sym-triazine cyanuric chloride and a benzotriazole intermediate in the anti-yellowing modifier absorb ultraviolet rays and reduce yellowing of the ultraviolet rays on the composite material, and maleimide groups, maleic anhydride and isocyanurate rings for increasing the crosslinking density cooperate with one another, so that the heat resistance of the material is improved, and the yellowing is reduced; phosphorus and nitrogen main chains of phosphonitrilic chloride trimer in the modified flame retardant have a conjugation effect, so that a protective film is formed, oxygen is isolated, and the phosphonitrilic chloride trimer and nitrogen are synergistically flame-retardant; the anti-yellowing automobile composite film prepared by the invention not only has excellent ultraviolet absorption performance, heat resistance and anti-yellowing effects, but also has a good flame retardant effect.

The invention discloses a polyester-polyurethane composite coating as well as a preparation method and application thereof, and relates to the technical field of coatings. The polyester-polyurethane composite coating comprises polyester resin, hydroxy acrylic resin, a polyester resin curing agent, an acrylic resin curing agent, a texturing agent and an auxiliary agent, and the mass of the hydroxy acrylic resin is 5-20% of the mass of the polyester resin. The polyester-polyurethane composite coating provided by the invention is used as base powder of a vacuum plating process, a formed coating has an obvious grain effect, can be matched with metal powder to present an excellent silver flashing effect after vacuum plating, also has good flexibility, corrosion resistance, hardness and other properties, is suitable for the vacuum plating process, and has a good application prospect. The coating can be further matched with a vacuum electroplating process provided by the invention to achieve a better effect, and is suitable for vacuum electroplating surface coating of the hub.

This invention provides a modified glass fiber, glass fiber reinforced butyl hot melt adhesive, and their preparation method. The modification method of the glass fiber includes: mixing a silane coupling agent with ethanol, stirring and hydrolyzing to obtain a silane coupling agent solution; placing the glass fiber in the silane coupling agent solution, stirring and reacting at 40-80℃ for 4-6 hours, then filtering, and curing the obtained solid product at 100-150℃ for 0.5-2 hours to obtain pre-modified glass fiber; immersing the pre-modified glass fiber in a toluene solution containing furanylsilane coupling agent, reacting under inert gas protection at 70-90℃ for 1-3 hours, and performing graft modification treatment to obtain the modified glass fiber. The use of silane coupling agent and furanylsilane coupling agent to introduce dynamic covalent bonds, synergistically modifying the glass fiber with a bilayer coupling agent, and introducing the modified glass fiber into the butyl rubber system, can effectively improve the mechanical properties and aging resistance of the butyl rubber while maintaining its original water tightness and air tightness.

The invention belongs to the technical field of graphene, and particularly relates to graphene leather capable of realizing temperature-sensitive color development and a preparation method of the graphene leather. As the graphene heating functional layer adopts the high-thixotropic silver paste, the printed circuit pattern is clear in edge, uniform in thickness and extremely high in consistency with the designed pattern; and a clear interface is formed between a silver paste circuit and leather fibers, and improper penetration is avoided. And the circuit resistance value consistency is excellent (the deviation is controlled within + / -5%), so that rapid, uniform and stable planar heating can be realized after the graphene heating layer is connected, and the local overheating hidden danger is perfectly eliminated. According to the present invention, the natural texture and the soft touch feeling of the leather are maintained while the efficient and safe heating performance with the visual color developing function is achieved.

The utility model relates to cable connection protection technical field discloses a sheath pipe structure for two cable joints, including upper casing, the outer wall fixed connection of upper casing has the connecting barrel, the inner wall rotationally connected with press column of connecting barrel, the lower surface fixed connection of press column has rotary column, the inside fixed connection of rotary column has the card post, the outer wall sliding connection of card post has the limit block, the outer wall fixed connection of limit block has lower casing, the inner wall fixed connection of connecting barrel has the limit piece, the outer wall sliding connection of rotary column has the spring. In the utility model, through the mutual cooperation between upper casing, connecting barrel, press column, rotary column, card post, limit block, limit piece, spring and lower casing, can greatly promote installation and maintenance efficiency, significantly reduce construction time and manpower cost, can simplify operation procedure simultaneously, reduce the dependence on professional tool and complex skill, reduce installation error risk.

The application belongs to the technical field of heat insulation films, and discloses a polyester-based explosion-proof heat insulation composite film and a preparation method and application thereof. The explosion-proof heat insulation composite film is a composite film with a layered structure. The layered structure comprises a sandwich heat insulation film, an anti-scratch layer and a mounting adhesive layer arranged on both sides of the sandwich heat insulation film. The sandwich heat insulation film is composed of a first polyester film, a second polyester film and a heat insulation layer sandwiched between the first polyester film and the second polyester film. In the heat insulation coating liquid, chlorinated polyolefin is used to increase the bonding adhesion and leveling dispersibility of the coating liquid on the polyester film, so that the coating type sandwich heat insulation film has excellent tear resistance and peeling resistance. The defects of the current coating type heat insulation film, such as easy blistering, heat insulation performance attenuation and reduced explosion-proof performance, are solved. The coating preparation process is simple and does not require a complex magnetron sputtering process, so that the cost of the explosion-proof heat insulation film is scaled and the production is realized.

The present application relates to a kind of low-temperature-resistant oil-resistant damping rubber composite material for outdoor engineering and its preparation method, belong to damping rubber modification technical field.The low-temperature-resistant oil-resistant damping rubber composite material for outdoor engineering described in the present application is prepared by high-vinyl polybutadiene rubber, butyl rubber, flocculation butyl nitrile rubber / oxidized carbon nanotube composite raw rubber and auxiliary mixing co-vulcanization.The vinyl content of high-vinyl polybutadiene rubber is 83-85%, Mn is 430-470, and the relative molecular mass distribution index is 2.0-2.5.The low-temperature-resistant oil-resistant damping rubber composite material for outdoor engineering described in the present application has a wider damping temperature range, excellent low-temperature damping performance, mechanical properties and oil resistance;Meanwhile, a simple and convenient preparation method is provided.

The utility model relates to the technical field of concrete square piles, and discloses an anti-compression and anti-pulling precast concrete square pile which comprises a concrete square pile body, a pile tip and an anti-pulling mechanism, the pile tip is fixedly arranged at the bottom end of the concrete square pile body, and the anti-pulling mechanism is fixedly arranged at the outer end of the concrete square pile body. An auxiliary mechanism is fixedly arranged at the inner end of the concrete square pile body; the anti-pulling mechanism comprises grooves, barb-shaped steel bars and anti-rust paint, the grooves are evenly formed in the outer end of the concrete square pile body, the barb-shaped steel bars are fixedly arranged on the side, close to the pile tip, of the outer end of the concrete square pile body, and the barb-shaped steel bars extend to the inner end of the concrete square pile body. According to the compression-resistant and pulling-resistant prefabricated concrete square pile, by arranging the pulling-resistant mechanism, the pulling-resistant performance of the concrete square pile is conveniently improved, the buoyancy of underground water is conveniently resisted, the anti-seismic effect is improved, normal use of a building is guaranteed, the use requirements of people are conveniently met, and the practicability is improved.

The present application relates to the field of polyurethane elastomer material, and particularly relates to a polybutadiene silicone diol, a preparation method thereof and a thermoplastic silicone polyurethane elastomer. The polybutadiene silicone diol with the structure of formula (I) has a moderate solubility parameter, the thermoplastic silicone polyurethane elastomer prepared from the polybutadiene silicone diol has a small degree of phase separation in the molecular chain of the elastomer, the product has unexpectedly good transparency, and in addition, the elastomer has the characteristics of PDMS and CTPB, and has excellent mechanical properties, outstanding low-temperature resilience, aging resistance, surface hydrophobicity and smoothness and other properties.

The invention provides a nano-composite anti-seepage coating for goaf sealing and a preparation method and application thereof. The impermeable coating comprises the following components in percentage by mass: 10 to 30 percent of nano silica sol subjected to surface organic modification, 15 to 35 percent of styrene-butadiene latex subjected to pH buffer stabilization, 0.5 to 10 percent of functional nano material subjected to surface activation treatment, 20 to 60 percent of superfine sand and the balance of short fiber, inorganic powder filler and auxiliaries. The method comprises raw material pretreatment; step-by-step gradient blending is performed; and functions are compounded. According to the application, the nano-composite anti-seepage coating is applied to surrounding rock reinforcement, crack plugging or anti-seepage sealing engineering of a coal mine goaf. The slurry has the advantages of being high in deep infiltration capacity, excellent in surface film forming and internal compatibility and stable in performance, an internal infiltration reinforcing layer and a surface sealing layer can be formed at the same time after construction, and an integrated double-layer anti-seepage network is formed.

The utility model relates to hexagonal net weaving forming equipment technical field, concretely to a kind of polyester hexagonal net weaving forming equipment, including bearing assembly and first bearing station, the bearing assembly includes support frame, installation rod is provided on the support frame, wire wheel is rotatably connected on the installation rod, the upper portion of wire wheel is provided with first mounting table, first mounting table rotatably connects with guide wheel, the downstream of guide wheel is provided with first mounting bracket, guide porcelain ring is installed on the first mounting bracket, the downstream of guide porcelain ring is provided with sliding rod, sliding block is installed on the sliding rod, tension porcelain ring is installed on the sliding block, to solve the raw material tension instability, transmission is easy to deviate, production continuity is poor, production efficiency is low and the problem such as operation complex in the existing polyester hexagonal net production equipment, realize the efficient, high quality, automated production of polyester hexagonal net.

The application relates to the technical field of rubber materials, and discloses fluorine rubber for high-temperature oxygen sensors and a processing technology thereof. The processing technology comprises the following steps: S1: fluorinated modified methyl vinyl silicone rubber is prepared from methyl vinyl silicone rubber and 1H, 1H, 2H, 2H-perfluorodecanethiol; S2: glycerol modified silicone rubber is prepared from methyl vinyl silicone rubber and 1-thioglycerol; the glycerol modified silicone rubber is taken, mixed uniformly in a mixed solvent of tetrahydrofuran and water, urea is added, phosphoric acid is added dropwise under heating, and the mixture is kept for reaction, the solvent is removed, and the mixture is dried to obtain phosphoric acid ester modified methyl vinyl silicone rubber; S3: the fluorine rubber after being broken, the fluorinated modified methyl vinyl silicone rubber and the phosphoric acid ester modified methyl vinyl silicone rubber are added into an open mill and mixed uniformly, a composite filler and magnesium oxide are added, mixing is carried out, a vulcanizing agent and a crosslinking aid are added, mixing is carried out uniformly, and vulcanization is carried out to obtain the fluorine rubber for high-temperature oxygen sensors.

The invention discloses a high-strength ultraviolet / moisture dual-curing PUR (Polyurethane) hot melt adhesive as well as a preparation method and a use method thereof. The adhesive is prepared from the following raw materials in parts by weight: 60 to 75 parts of isocyanate-terminated polyurethane prepolymer, 10 to 20 parts of polyurethane acrylate, 10 to 30 parts of reactive diluent, 1 to 5 parts of photoinitiator, 0.1 to 0.5 part of filler, 0.5 to 2 parts of silane coupling agent and 5 to 20 parts of tackifying resin. Wherein the isocyanate-terminated polyurethane prepolymer is obtained through a reaction of dihydric alcohol and isocyanate, the polyurethane acrylate is obtained through a reaction of the isocyanate-terminated polyurethane prepolymer and an acrylate monomer, and the adhesive disclosed by the invention has the dual advantages of rapid positioning in ultraviolet curing and high strength and durability in moisture curing; the adhesive has the advantages of high adhesive strength, good process adaptability, ultrahigh bonding strength, excellent heat resistance and aging resistance, and is especially suitable for assembly line rapid bonding and assembly of precise parts such as electronic components and optical elements.

The invention discloses an anti-aging and anti-electromagnetic shielding cable and a preparation method thereof, and belongs to the field of high voltage and the technical field of materials, the anti-aging and anti-electromagnetic shielding cable structurally contains a polyurethane-polyethylene copolymer and a flame-retardant and anti-electromagnetic sheet composite carrier, contains a polyurethane chain segment which is connected with a polyethylene main chain through a covalent bond, has no interface separation risk, and has good anti-aging and anti-electromagnetic shielding effects. Polyethylene is resistant to acid, alkali and salt mist, a carbamate group in a polyurethane chain segment can capture free radicals generated by photooxidation and thermal oxidation of polyethylene, aging is delayed from the molecular level, and the flame-retardant anti-electromagnetic sheet composite carrier endows the cable with good aging resistance and anti-electromagnetic shielding characteristics; the lamellar structure of the sheet-shaped carrier can block heat transfer and combustible volatilization, and the lamellar structure and the sheet-shaped carrier synergistically improve the flame-retardant efficiency; the introduction of the flaky composite carrier not only endows functional characteristics, but also can be used as a rigid reinforcement phase, so that the wear resistance and the extrusion resistance of the cable are improved, and the loss of the cable in the dragging and construction processes is reduced.

The invention relates to a high-hardness polyurethane adhesive as well as a preparation process and application thereof, and belongs to the technical field of polyurethane materials. The high-hardness polyurethane adhesive comprises a component A and a component B. The component A comprises the following raw materials in parts by weight: 30-50 parts of polyether polyol, 10-20 parts of a cross-linking agent, 5-10 parts of a composite filler, 0.5-1 part of a catalyst and 0.5-1 part of an antioxidant; and the component B is polyisocyanate. The adhesive prepared by the invention has high hardness and good toughness.

The application provides a two-component polyurethane pouring sealant and a preparation method and application thereof. The two-component pouring sealant comprises an A component and a B component. The A component comprises propylene oxide modified lignin polyol and erythritol modified polyether polyol. The B component comprises cashew phenol based polyurethane prepolymer. The propylene oxide modified lignin polyol, the erythritol modified polyether polyol and the cashew phenol based polyurethane prepolymer have a synergistic effect, which can significantly improve the shear strength of the pouring sealant at high temperature, and the pouring sealant has good low-temperature bonding performance, aging resistance and impact resistance. Specifically, the shear strength at 60 DEG C is greater than 13 MPa, the shear strength remains above 12.5 MPa after aging in a double 85 environment, the attenuation rate is less than 7% compared with the shear strength at room temperature, the shear strength can remain above 13 MPa after high-low temperature impact test, the attenuation rate is less than 3%, and the pouring sealant meets the pouring requirements of power batteries in the field of new energy batteries.