300 results about "Glycidyl ethers" patented technology

The invention discloses a toughened epoxy resin and a curing method thereof, and relates to the technical field of epoxy resins, the toughened epoxy resin comprises the following components: 100 parts of an epoxy resin matrix, specifically a mixture of bisphenol A epoxy resin and alicyclic epoxy resin, 5-35 parts of a composite amine curing agent, and 5-20 parts of a nano toughening agent, in particular to core-shell rubber particles grafted with epoxy groups on the surfaces, the core layer of each core-shell rubber particle is cross-linked polybutadiene, the shell layer of each core-shell rubber particle is polymethyl methacrylate, 0.5-3 parts of an accelerant comprising a bi-component synergistic accelerant, 1-5 parts of an interface enhancer, and a mixture of gamma-glycidyl ether oxypropyl trimethoxy silane and a titanate coupling agent, a bisphenol A type epoxy resin and a specific proportion of alicyclic epoxy resin are combined to construct an epoxy resin matrix according to a mass ratio of 2: 1, the epoxy resin matrix is matched with a composite amine curing agent prepared by carrying out a special three-step reaction on long-chain polyether diamine, aromatic diamine and anhydride, and key parameters such as molecular weight, functionality and molar ratio of the components are accurately regulated and controlled.

The invention discloses a colorful acid and alkali resistant laser printing ink and a preparation method thereof. The printing ink is composed of the following components in parts by weight: 0 to 30 parts of butanone, 10 to 30 parts of isopropanol, 2 to 6 parts of curing agent, 10 to 15 parts of pigment, and 10 to 30 parts of glycidyl ether epoxy resin. The glycidyl ether epoxy resin is adopted to produce the printing ink, aliphatic polyamine is further chosen as the curing agent, the acid and alkali resistant performance of the printing ink is strengthened through optimizing the formula, thus the shortage that the colorful laser printing ink is lost when being mixed with acid and alkali is overcome, moreover, the color of the laser printing product is more abundant, and the patterns are more clear.

The invention relates to the technical field of ink, and discloses a preparation method of bio-based degradable water-based ink, which comprises the following steps: carrying out esterification polymerization on vanillin-based spiro acetal diglycidyl ether and diacid to obtain bio-based polyester resin, mixing and dispersing the bio-based polyester resin, petroleum-based resin, pigment, auxiliary agent and the like to obtain the bio-based degradable water-based ink. The bio-based degradable water-based ink is prepared. The bio-based resin contains a plurality of hydrophilic hydroxyl groups, has good solubility and dispersibility in the water-based ink, and generates denser hydrogen bonds and other cross-linking effects with the acrylic resin, so that the hardness of the ink is improved. Meanwhile, the polar hydroxyl groups also greatly enhance the hydrogen bond bonding and anchoring effect between the paint film and the base material, so that the adhesive force is improved. In addition, easily-hydrolyzed spiral acetal bonds, polyester structural units and other degradable chemical bonds in molecular chains of the bio-based resin provide more attack sites for water and microorganisms, the degradation rate is increased, and the degradable function is achieved.

The invention belongs to the technical field of nanocrystal nucleus early strength agents, and provides a damp and hot nanocrystal nucleus early strength agent, a tailing solidification filling material and a preparation method and application of the damp and hot nanocrystal nucleus early strength agent and the tailing solidification filling material. The invention discloses a molybdenum ore tailing slurry which is prepared from the following raw materials in parts by weight: 1 part of Portland cement, 4 to 6 parts of molybdenum ore tailings, 0.06 to 0.1 part of zeolite powder, 0.07 to 0.1 part of nanoscale attapulgite powder, 0.06 to 0.1 part of gamma-glycidyl ether oxypropyl trimethoxy silane, 0.03 to 0.1 part of potassium silicate, 0.04 to 0.1 part of sodium hydroxide, 0.06 to 0.1 part of calcium formate, 0.04 to 0.1 part of lithium metaaluminate and 1.25 to 1.75 parts of water. According to the technical scheme, the problem that a filling body prepared from an early strength agent in the prior art is low in early and later strength is solved, and meanwhile, the early strength agent is simple and convenient in preparation mode, low in cost and wide in application range.

The invention relates to the technical field of agricultural fertilizers, in particular to an organic-inorganic composite silicon-calcium-magnesium fertilizer and a preparation method and application of the organic-inorganic composite silicon-calcium-magnesium fertilizer. The high-temperature activated silicon-calcium-magnesium mineral powder is composed of calcined wollastonite powder, calcined serpentine powder, dolomite powder and zeolite powder; 2%-5% of an organosilane modifier, wherein the organosilane modifier is composed of gamma-aminopropyl triethoxy silane and gamma-glycidyl ether oxypropyl trimethoxy silane, and the organic silane modifier is composed of gamma-aminopropyl triethoxy silane and gamma-glycidyl ether oxypropyl trimethoxy silane; 18%-35% of a functional organic matter complex, wherein the functional organic matter complex is composed of mineral source sodium humate, bioactive small peptide, sodium alginate and polyglutamic acid; and 3%-8% of auxiliary functional components, so that the solubility and the bioavailability of silicon, calcium and magnesium elements in minerals are remarkably improved.

The invention relates to the technical field of fabrics, and discloses a cool antistatic comfortable fabric and a preparation method thereof.The cool antistatic comfortable fabric is obtained by reacting pentanebis (glycine), 1, 3-bis (3-glycidyl ether oxypropyl) tetramethyldisiloxane, epoxy chloropropane and the like to obtain an epoxy quaternization finishing agent and finishing a cotton fabric. The epoxy quaternization finishing agent contains a flexible siloxane structure, can improve the softness and wrinkle resistance of the cotton fabric, contains quaternary ammonium salt and carboxyl hydrophilic groups, enables the cotton fabric to keep good hydrophilicity and cool hand feeling, contains quaternary ammonium salt cations, can increase the conductivity of the surface of the cotton fabric, and improves the anti-wrinkle performance of the cotton fabric. The surface resistivity is reduced, so that the anti-static performance is improved, and the cotton fabric still keeps good soft anti-wrinkle performance and anti-static performance after being washed for multiple times.

The invention belongs to the field of fiber reinforced composite materials, and provides an SCA modified basalt fiber cement base and a preparation method thereof.The preparation method comprises the following steps that basalt fibers are pretreated; a gamma-aminopropyltriethoxysilane solution, a gamma-glycidyl ether oxypropyltrimethoxysilane solution and a gamma-methacryloyloxypropyltrimethoxysilane solution are prepared, and the dried basalt fibers are soaked in the solutions respectively to be modified; naturally airing at room temperature after soaking, drying in an air dry oven, cooling to room temperature, and sealing and storing; carrying out dry mixing on the modified basalt fiber, ordinary Portland cement, sand and an additive to prepare an SCA modified basalt fiber cement base; by adopting different SCAs and introducing additional reaction functional groups, the interface bonding strength between the basalt fibers and a cement matrix is improved, and the problem of non-uniform fiber dispersion is solved, so that the comprehensive performance of the material is improved.

The invention relates to the field of aerogel composite materials, in particular to a high-temperature-resistant aerogel calcium silicate composite material and a preparation method thereof, and solves the problems that the mechanical property of aerogel is reduced and the service life is shortened due to the fact that the interface bonding force between an existing aerogel phase and a reinforced phase is easily limited by the material and influenced by modified substances. The preparation method comprises the following steps: firstly, dispersing calcium salt in an aqueous solution of ethanol to form a calcium salt solvent, sequentially adding polymethylacrylic acid and 1, 4-butanediol diglycidyl ether to form a calcium salt gel precursor, placing activated fibers in a polyphenol chitosan solution for reaction, placing reinforced fibers in a molybdenum disulfide turbid solution for ultrasonic dispersion, and drying to obtain the composite material. Then carrying out hydrothermal reaction, immersing the composite fibers into a calcium salt gel precursor for negative pressure vacuum adsorption, and drying to form the high-temperature-resistant aerogel calcium silicate composite material. The interface bonding capacity and the heat resistance of the composite material can be enhanced, and the mechanical property and the heat insulation property of the material at high temperature are remarkably enhanced.

The invention relates to the technical field of WPC mould pressing floors, in particular to UV paint for WPC mould pressing floor surface coating and a preparation technology of the UV paint. The UV paint for coating the surface of the WPC mould pressing floor is prepared from the following raw materials in parts by mass: 40 to 60 parts of trifunctional polyurethane acrylate, 5 to 15 parts of hexa-functional polyurethane acrylate, 10 to 20 parts of trifunctional polyester acrylate, 1 to 5 parts of acrylic monomer, 5 to 15 parts of wet aluminum oxide and 1 to 2 parts of gamma-glycidyl ether oxypropyl trimethoxy silane. The coating is prepared from the following components in parts by weight: 1-3 parts of diphenylmethane diisocyanate, 0.1-1 part of 5-aminotetrazole, 1-3 parts of carboxyl functionalized PMMA microspheres, 1-3 parts of a flatting agent, 1-3 parts of a photoinitiator, 1-2 parts of a dispersing agent, 1-2 parts of a wetting agent and 20-40 parts of a mixed solvent. The coating is high in curing speed, high in adhesive force, good in flexibility and excellent in wear resistance.

The invention belongs to the technical field of degradation and recovery of high polymer materials, and discloses a subcritical hydrothermal catalytic degradation and recovery method of acid anhydride / glycidyl ether epoxy resin, which comprises the following steps: placing an anhydride / glycidyl ether epoxy resin sample and a nitric acid solution in a hydrothermal reaction kettle; raising the temperature through a program temperature control device and maintaining a constant-temperature reaction. The degradation rate of 80.6%-100% of the epoxy resin can be achieved through the hydrothermal degradation reaction. Compared with a traditional thermal cracking and supercritical fluid degradation process, the method has the advantages that an acidic degradation system without organic solvent addition and transition metal catalysis is innovatively constructed, and efficient degradation of an epoxy resin network structure is realized under the subcritical hydrothermal condition. The process has the characteristics of mild reaction conditions, relatively low energy consumption, environmental friendliness and the like, and provides a feasible chemical technical path for resourceful treatment of the anhydride cured glycidyl ether type epoxy resin waste.

The invention relates to a synthetic method of 1, 4-butanediol diglycidyl ether, 1, 4-butanediol and epichlorohydrin are synthesized in one step under the action of a phase transfer catalyst, in the one-step process, once 1, 4-butanediol and epichlorohydrin are subjected to ring-opening reaction to produce a chlorohydrin ether intermediate, the chlorohydrin ether intermediate is subjected to ring-opening reaction, and the chlorohydrin ether intermediate is subjected to ring-opening reaction to produce the 1, 4-butanediol diglycidyl ether. The intermediate can be subjected to ring-closure production immediately under the action of solid alkali to produce an epoxy group, the obtained 1, 4-butanediol diglycidyl ether is relatively low in easily saponifiable chlorine content, and the target product is relatively high in purity. After the reaction is finished, sodium chloride generated by the reaction and unreacted solid caustic soda can be removed through direct suction filtration to obtain a neutral system, washing is not needed, no waste liquid is generated, operation is easy, and the method is suitable for clean industrial production.

The invention provides a super wear-resistant polyurethane floor coating and a preparation method thereof, the super wear-resistant polyurethane floor coating comprises a component A, a component B and a component C. The component A comprises glycidyl ether compound modified polyisocyanate; the component B comprises a latent imine curing agent, a diluent, a functional auxiliary agent and a pigment filler; the component C comprises aggregate; the mass ratio of the component A to the component B to the component C is (4-6): (2-4): (1-3). By optimizing and modifying the components in the super wear-resistant polyurethane coating, the properties such as high hardness, excellent wear resistance and the like of the super wear-resistant polyurethane finish paint are maintained; the interlayer adhesive force between the super-wear-resistant polyurethane floor finish paint material and various epoxy floating coatings can be obviously improved, and the construction matching property in a high-humidity environment and the wear resistance of a whole floor coating system are improved.

The invention discloses a raw foil titanium composite anode plate and a preparation method thereof, and belongs to the technical field of electrolytic copper foils, vinyl cage-type nanospheres prepared by a sol-gel method and 1, 1, 3, 3-tetramethyldisiloxane-propyl glycidyl ether are subjected to hydrosilylation reaction to obtain epoxy cage-type nanospheres, and the epoxy cage-type nanospheres and 1, 1, 3, 3-tetramethyldisiloxane-propyl glycidyl ether are subjected to hydrosilylation reaction to obtain the raw foil titanium composite anode plate. The amino group on the surface of the chitosan / mesoporous silica core-shell powder is utilized to initiate ring opening of the epoxy group of the epoxy cage type nanosphere, so that the surface of the chitosan / mesoporous silica core-shell powder is uniformly coated with the epoxy cage type nanosphere, and the multi-layer core-shell micron carbon sphere is formed after calcination; the micron carbon spheres can disperse stress through the multi-layer core-shell structure of the micron carbon spheres, so that surface cracking of the anode caused by impact of high-flow electrolyte is avoided; the micron carbon spheres can form a micro convex structure on the surface of the pretreated foil rolled material, so that the surface roughness can be increased, the falling of an oxide layer is avoided, and the micron carbon spheres can obviously increase the conductivity of the titanium anode.

The invention discloses a modification method and application of double-layer impregnated modified aramid fiber, and the double-layer impregnated modified aramid fiber is prepared by the following steps: reacting hexamethylene diisocyanate and glycerol triglycidyl ether in a water phase to form a first-layer impregnation liquid, and carrying out first-layer impregnation modification on aramid fiber; and forming a second-layer impregnation liquid from ethylene glycol diglycidyl ether, diethylenetriamine, glycidyl methacrylate and butadiene-vinylpyridine rubber latex, performing second-layer impregnation modification on the aramid fibers, drying after double-layer modification to obtain double-layer impregnation modified aramid fibers, and blending and vulcanizing the double-layer impregnation modified aramid fibers and rubber to obtain the rubber-modified aramid fibers. The modified aramid fiber reinforced butadiene styrene rubber composite material can be prepared. By designing a two-step dipping treatment system containing isocyanate and epoxy bifunctional groups, efficient chemical modification of the aramid fiber surface is realized, and a good reaction interface with a rubber matrix is endowed.

The invention relates to degradable self-repairing epoxy resin based on adjustable performance of dual dynamic covalent bonds and preparation and application of the degradable self-repairing epoxy resin. Firstly, two dynamic bond curing agents (a hindered urea bond and an imine bond) are prepared respectively, and an epoxy monomer bisphenol A diglycidyl ether, the two curing agents and a cross-linking agent 4, 4 '-diphenyl-1, 3-pentanediol diglycidyl ether are mixed to prepare a mixture; the preparation method comprises the following steps: mixing 4, 4 '-diaminodiphenylmethane according to the proportion of each dynamic bond, stirring and reacting at 70-80 DEG C for 30-60 minutes, and carrying out vacuum defoaming; and finally, pouring the mixture into a mold, and molding through a gradient curing process. Compared with the prior art, two different dynamic bond curing agents are utilized to construct a double-dynamic epoxy cross-linked network, so that the obtained material has excellent performance and degradable self-repairing capability, and a high-performance solution capable of repairing, degrading and prolonging the service cycle is provided for the field of electrical insulation.

The invention discloses a high-toughness long-acting steel structure anticorrosive coating material, and relates to the technical field of anticorrosive paint. The anti-rust paint is prepared from the following components in parts by mass: 15 to 20 parts of epoxy resin, 10 to 15 parts of organic silicon polyurethane modified epoxy resin, 5 to 10 parts of organic silicon oligomer containing multiple epoxy groups, 10 to 15 parts of polypropylene glycol diglycidyl ether, 4 to 6 parts of titanium dioxide, 5 to 10 parts of anti-rust pigment, 10 to 20 parts of micaceous iron oxide gray, 2 to 3 parts of auxiliaries, 30 to 40 parts of polyamide 650 and 10 to 15 parts of triethanolamine. The flexibility, the ultraviolet resistance and the corrosion resistance of the anti-corrosion coating material are remarkably improved, and the service life is effectively prolonged.

This invention discloses a bio-based flame-retardant thermally expanding powder coating and its preparation method, relating to the field of coatings. It comprises the following components: bio-based epoxy resin, phenolic epoxy curing agent, ammonium polyphosphate, nano-titanium dioxide, zinc borate, expanded graphene, 8-12 parts of imidazole, benzoin, and a leveling agent. The bio-based epoxy resin is prepared by ring-opening copolymerization of cashew phenol glycidyl ether and linoleic acid prepolymer, followed by epoxy end-capping, with an epoxy equivalent of 900-1200 g / eq; the phenolic epoxy curing agent has an epoxy equivalent of 200-250 g / eq; and the expanded graphene has an initial expansion ratio of 200-300 times. The preparation method employs a two-step, staged mixing process. This invention, while maintaining zero VOC in powder coatings and the same film thickness, achieves for the first time the outstanding performance of 6H hardness, UL94V-0 flame retardancy, and 120 times expansion ratio through the systematic synergy of high epoxy equivalent bio-based resin, four-component complete flame retardant system, specific EG:APP ratio, and two-step process.

The invention discloses an aged SBS modified asphalt repair type regenerant and a preparation method thereof, and the regenerant is prepared by mixing aromatic hydrocarbon oil with 1, 4-butanediol diglycidyl ether and then mixing with rubber powder. Wherein the dosage of each component is as follows: 3-8 parts of aromatic hydrocarbon oil, 0.5-2 parts of 1, 4-butanediol diglycidyl ether and 8-10 parts of rubber powder. The repairing type regenerant can uniformly improve the high-temperature performance, ductility, recovery rate and other performance of SBS asphalt, and the problem of imbalance caused by prominent or backward individual indexes due to single components is avoided. And finally, the comprehensive performance of the regenerated asphalt is superior to that of the aged asphalt and is better than that of the common mixed regenerated asphalt, so that the comprehensive quality improvement of the performance of the aged SBS modified asphalt is realized.

The invention relates to the field of ceramic packaging materials, in particular to a packaging material for a high-voltage-resistant ceramic side wall and a preparation method of the packaging material. The packaging material is prepared from an epoxy-silica hybrid prepolymer, an aluminum oxide and silicon dioxide core-shell composite filler, methylhexahydrophthalic anhydride and 2-ethyl-4-methylimidazole, wherein the hybrid prepolymer is prepared by carrying out hydrolytic condensation on bisphenol A diglycidyl ether, hydroxyl-terminated PDMS (Polydimethylsiloxane) and 3-glycidoxypropyltrimethoxysilane; low viscosity and low volatile matter are realized; the core-shell filler takes aluminum oxide as a core and silicon dioxide as a shell, and a shell layer is grafted with epoxy silane so as to be chemically bonded with resin. And after curing, the power frequency short-time electrical strength of the packaging layer is greater than or equal to 20 kV / mm, the partial discharge initial voltage is greater than or equal to 3 kV, the volatile matter is less than or equal to 1.0 wt%, and the water content is less than or equal to 0.2 wt%.

This invention relates to the field of polyurethane foam materials, specifically, to a preparation process for an aging-resistant and flame-retardant polyurethane foam material. The preparation process includes the preparation of a composite flame retardant, the preparation of component A, and the preparation of the polyurethane foam material. This invention integrates the composite flame retardant into the cross-linked network of the polyurethane foam material via chemical bonds. The composite flame retardant is prepared by grafting a phosphorus-containing flame-retardant structure onto the cage-like polysilsesquioxane structure after a ring-opening reaction between the epoxy groups in glycidyl etheroxypropyl cage-like polysilsesquioxane or octacyclooxycyclohexylethyl cage-like polysilsesquioxane and the acidic hydroxyl groups in diphenyl phosphate. The composite flame retardant of this invention is less prone to migration, precipitation, or loss, and improves the rigidity and aging resistance of the polyurethane matrix through its rigid cage structure and benzene rings, thereby improving flame retardant performance while reducing adverse effects on the mechanical properties of the foam material.

The present invention discloses a preparation method of a leather tanning agent based on modified convexobar crystals, specifically: γ-glycidyl ether propyl trimethoxysilane, chitosan, triethylamine, and deionized water are sequentially added to a convexobar crystal solution, stirred to obtain a mixed solution; hydrochloric acid is added to the obtained mixed solution to adjust the pH to 4-6, and then freeze-dried to obtain a solid powder, which is a leather tanning agent modified by convexobar crystals. The present invention stably combines the epoxy groups on the convexobar crystals modified with KH-560 through the amino groups in chitosan, and the free epoxy groups exert a tanning effect and cross-link with collagen fibers, thereby greatly improving the shrinkage temperature of the leather. In addition, the present invention proposes a "gradient feeding in-situ one-step preparation strategy" to modify the convexobar crystals, which is environmentally friendly and simple, and realizes the sustainable development of chrome-free tanning technology.

This invention relates to the field of protective coating technology for ships and marine engineering equipment, specifically to a high interfacial bonding strength gradient bonding layer and its preparation method. The preparation method includes grafting epoxy resin with γ-glycidoxypropyltrimethoxysilane; dissolving the modified epoxy resin, polydimethylsiloxane, and their respective curing agents in an organic solvent to obtain a blended resin precursor; coating the precursor onto the surface of an anti-corrosion paint and curing it to form a film. By controlling the migration rate of the resin components and the curing reaction rate during the curing process, a continuous gradient distribution structure is formed from the coating air interface to the substrate interface, with the concentration of modified epoxy resin continuously increasing and the concentration of polydimethylsiloxane continuously decreasing. This invention, through the synergistic regulation of thermodynamics and kinetics, forms an interpenetrating polymer network structure within the bonding layer, significantly improving the interfacial bonding strength and long-term service stability between the anti-corrosion paint and the antifouling paint.

The invention provides an in-use sewage pool body leakage repairing agent as well as a preparation method and a construction process thereof, and relates to the technical field of pool body anti-seepage transformation. The sewage pool body leakage repairing agent is prepared from the following raw materials in parts by weight: 30-40 parts of polyurethane resin, 20-30 parts of epoxy resin, 5-10 parts of an isocyanate curing agent, 1-3 parts of polyether modified silicone oil, 3-6 parts of ceramic powder, 1-3 parts of carbon fibers, 0.5-1 part of a silane coupling agent, 2-5 parts of propylene glycol diglycidyl ether, 0.3-0.5 part of an acid and alkali resistant anti-aging agent and 0.3-0.5 part of an anti-ultraviolet agent. By optimizing the component proportion of the leak repairing agent, the leak repairing agent has the characteristic of rapid solidification under a low-temperature condition, and has the effects of high strength, micro-expansion, good compactness and long-term performance; meanwhile, a temporary water storage bag, a temporary pump and a pipeline are adopted, so that the sewage treatment process is not interrupted when the leakage of the sewage pool body is repaired.

Belonging to the technical field of fabric degradation, the invention relates to an ecological green fabric degradation process, which belongs to the technical field of fabric degradation, and comprises the following steps: adding anhydrous N, N-dimethylformamide to a reaction kettle equipped with a mechanical stirrer, a condenser pipe and a nitrogen protection device to dissolve hyperbranched polyglycidyl ether with a number average molecular weight Mn of 2000-5000 g / mol, adding dibutyltin dilaurate of which the use amount is 0.1-0.5% of the mass of the hyperbranched polyglycidyl ether, dropwise adding 3-isocyanate propyl triethoxy silane while stirring, heating to 58-62 DEG C, and reacting for 3.5-4.5 hours, so that isocyanate groups react with part of hydroxyl groups on the surface of the hyperbranched polyglycidyl ether to form carbamate bonds; according to the scheme, a specific shell structure is constructed, so that the defect that degradation components are easy to lose in a traditional process is effectively overcome, and in an actual test, the scheme can effectively prevent the loss of functional components in a washing process and ensure the stability of the fabric in a taking period.

The invention relates to the field of semiconductor protection films, and discloses a photoetching mask protection film for a semiconductor and a preparation method of the photoetching mask protection film. The photoetching mask protective film for the semiconductor is prepared from the following raw materials in parts by weight: 20-30 parts of fluorinated ethylene propylene dispersion liquid, 18-28 parts of polytetrafluoroethylene dispersion liquid, 12-20 parts of a heat-resistant agent, 4.5-8.5 parts of an antistatic agent and 1-3 parts of an antioxidant, the heat-resistant agent is prepared from perfluorooctyl ethyl acrylate, alkenyl phenyl glycidyl ether, a solvent and a catalyst through a reaction; the preparation method comprises the following steps: S1, uniformly mixing all the components to prepare dispersion liquid; and S2, carrying out film casting on the dispersion liquid, and drying. The protective film prepared by the invention is applied to a semiconductor photoetching process, has relatively good light and heat resistance, antistatic property and light transmittance, can play a relatively good protection role on a mask plate, and meanwhile, improves the precision of a photoetching pattern.

The application provides a production method of an aluminum-plastic film and an aluminum electrolytic capacitor formation foil, relates to the field of formation foil production, and is characterized by an aluminum-plastic film structure and a preparation process of the formation foil. The aluminum-plastic film comprises, from inside to outside, an aluminum electrolytic capacitor formation foil, a bonding layer and a heat-sealing layer. The bonding layer is composed of maleic anhydride modified polyolefin, diisocyanate and glycidyl ether type epoxy resin, and the heat-sealing layer is composed of polypropylene and polyphenylene sulfide. The production of the formation foil is realized through multi-stage electrolytic oxidation and optimized combination of various additives, so that the thickness and compactness of the oxidation film are gradually improved, the voltage resistance, specific capacity and mechanical strength of the formation foil are significantly improved, and the leakage current is reduced.

The present invention relates to the technical field of cable preparation, and particularly relates to a water-resistant aluminum alloy core photovoltaic cable and its preparation process. The preparation process includes the following steps: preparing modified epoxy resin; preparing a copolymer from hydroxypivalic acid neopentyl glycol monoester and butyl glycidyl ether; preparing cable sheath filler; and preparing a water-resistant aluminum alloy core photovoltaic cable. In the present invention, a copolymer is prepared from hydroxypivalic acid neopentyl glycol monoester and butyl glycidyl ether. After the two are combined and participate in the curing reaction, it not only improves the flexibility of the epoxy resin, but also significantly improves its impact strength and heat resistance. The highly flexible filler fills the voids inside the cable, reduces air gaps, and prevents them, thereby improving the overall insulation performance of the cable. The good heat resistance of the filler enables it to maintain good mechanical properties in the high-temperature environment caused by the long-term use of the cable, and extends the service life of the cable.

This invention provides a low-temperature resistant epoxy-terminated polyurethane toughened epoxy adhesive and its preparation method, comprising the following steps: Step 1, drying polyol and isocyanate; Step 2, adding the dried polyol, dried isocyanate, and a portion of catalyst at 50-60℃, and stirring; Step 3, continuing to maintain the 50-60℃ condition, adding glycidyl ether and the remaining catalyst, and stirring to obtain an epoxy-terminated polyurethane prepolymer; Step 4, slowly adding epoxy resin and stirring; Step 5, adding a curing agent to react; Step 6, eliminating air bubbles; Step 7, drying to further cure and obtain the epoxy-terminated polyurethane toughened epoxy adhesive. This invention can be used even in ultra-low temperature environments of -196℃, reducing engineering losses and safety issues caused by low-temperature brittle fracture of resin, extending service life, and saving manpower and resources. Simultaneously, the preparation process is simple and requires no complex equipment, and the synthesis temperature is low and easy to control.

The invention relates to an epoxy adhesive for assembling bridge segments in a marine environment and a preparation method, the epoxy adhesive comprises a component A and a component B. The component A comprises epoxy resin, modified epoxy resin, a reactive diluent, a thixotropic agent, a coupling agent, a defoaming agent, an ultraviolet light absorber and a filler; the epoxy resin comprises bisphenol A type epoxy resin, hydrogenated bisphenol A type epoxy resin and bisphenol F type epoxy resin, and the reactive diluent is C12-C14 alkyl glycidyl ether; the component B comprises a modified amine curing agent, a thixotropic agent and a filler, and the filler is formed by compounding different grades of active silica micropowder. Through molecular hydrophobic design, physical structure dense filling and interface chemical bonding, the adhesive has excellent wet concrete adhesion, extremely low chloride ion permeability, excellent damp-heat aging resistance and balanced construction manufacturability, and solves the problem of durability of a joint of a segment assembled bridge in a marine environment.

Provided are: an adhesive composition which has excellent solder heat resistance and adhesive strength and also has excellent dielectric properties such as a low relative dielectric constant and a low dielectric loss tangent; and an adhesive sheet, a laminate, and a printed wiring board which contain the adhesive composition. The adhesive composition according to the present invention contains a polyimide resin and an epoxy resin (E), and is characterized in that the epoxy resin (E) contains an epoxy resin (A) represented by formula (I): (In formula (I), R1-R5 each independently represent a hydrogen atom or a C1-10 alkyl group; the content of the glycidyl ether epoxy resin (B) contained as the epoxy resin (E) is 5 parts by mass or less with respect to 100 parts by mass of the polyimide resin.