967 results about "Glycidyl ether" patented technology

A fireproof magnesium oxide board is prepared by mixing the following raw materials, the raw material names and weight parts are as follows: 80-100 parts of magnesium oxide; 20-30 parts of anhydrous magnesium chloride; 10-20 parts of modified expanded vermiculite foaming agent; 20-30 parts of aluminum silicate fiber; 5-10 parts of sawdust; 10-15 parts of fly ash; 8-12 parts of glass magnesium board crushed powder; 1.5-5 parts of non-woven fabric; 10-20 parts of water; wherein the modified expanded vermiculite is prepared by the following steps: (1) Vermiculite is incompletely expanded and calcined; (2) acrylic acid monomer, sodium hydroxide, acrylamide monomer, initiator potassium persulfate, crosslinking aid pentaerythritol polyglycidyl ether, incompletely expanded vermiculite, and water are taken, stirred evenly and ultrasonically dispersed to obtain a first reaction solution, which is placed in a reactor for reaction to obtain a gel material; (3) the gel material is preliminarily crushed and dried, and then further crushed in a ball mill to obtain a fire-resistant expanded vermiculite with water absorption performance.

The invention relates to the field of adhesives, and particularly discloses an OCA optical adhesive for a folding screen and a preparation method of the OCA optical adhesive. The OCA optical adhesive for the folding screen is prepared from the following raw materials in parts by weight: 60 to 80 parts of urethane acrylate, 15 to 25 parts of organic silicon grafted glycidyl ether, 20 to 30 parts of a diluent, 5 to 10 parts of a photoinitiator and 1 to 2 parts of an antioxidant, the organic silicon grafted glycidyl ether is prepared by reacting vinyl siloxane, pentaerythritol triallyl ether, allyl glycidyl ether and a catalyst. The OCA optical cement for the folding screen prepared by the invention is applied to the folding screen, and can keep relatively good elasticity, bending resistance and bonding strength in the long-term repeated folding use process, and wrinkles and bubbles are not easy to appear.

The invention relates to the technical field of petrochemical engineering, and discloses a temperature-resistant anti-swelling agent for fracturing and a preparation process thereof.The preparation method comprises the steps that glycerol triglycidyl ether and diethanol amine are subjected to a ring-opening reaction, a polyhydroxy tertiary amine monomer is obtained, then the polyhydroxy tertiary amine monomer and chloromethylated polystyrene are subjected to a quaternization reaction, and the temperature-resistant anti-swelling agent for fracturing is obtained. Quaternary ammonium salt groups of the anti-swelling agent and negative charges on the surface of clay form electrostatic interaction, and hydroxyl groups and the surface of the clay form hydrogen-bond interaction, so that the anti-swelling agent can be firmly adsorbed on the surface of the clay to form a layer of polymer film, the clay is prevented from being in contact with water, the phenomenon that the clay swells when encountering water is effectively inhibited, and the anti-swelling rate is very high. And the anti-swelling agent contains a heat-resistant polystyrene molecular chain, has excellent high temperature resistance, can maintain good structural stability at high temperature, still maintains high anti-swelling rate, and is suitable for a fracturing fluid system for high-temperature oil reservoir exploitation.

The invention discloses a crosslinked polyethylene reinforced high-strength insulating aerial cable, and belongs to the technical field of crosslinked polyethylene cable materials.The crosslinked polyethylene reinforced high-strength insulating aerial cable is prepared by the steps that hydroxyl is introduced to nano boron nitride powder, then amino is grafted through KH-550, nano alpha-Al2O3 powder is modified through gamma-glycidyl ether oxypropyl trimethoxy silane, and the cross-linked polyethylene reinforced high-strength insulating aerial cable is obtained; the preparation method comprises the following steps: preparing low-density polyethylene, compounding the low-density polyethylene with aminated nano boron nitride powder to form nano composite powder, improving the interface bonding force between the low-density polyethylene and the nano composite powder, carrying out melt blending on the low-density polyethylene and the nano composite powder to improve the dispersity of the nano composite powder in the low-density polyethylene, and carrying out nucleophilic acyl substitution reaction to obtain a fluorine-containing modified monomer. The nano boron nitride powder and the nano alpha-Al2O3 powder are subjected to a cross-linking reaction under the initiation action of an initiator and then coat the exterior of the thermal insulation layer, and the nano boron nitride powder and the nano alpha-Al2O3 powder are bridged through siloxane bonds to form a three-dimensional heat-conducting network, so that the heat resistance of the outer insulating layer is improved.

The invention belongs to the technical field of high polymer chemical materials, and particularly relates to a self-repairing composite waterproof board and a preparation method thereof. The invention relates to a high-temperature-resistant graphene coating which is prepared from the following raw materials: bisphenol A diglycidyl ether, fluorosilane modified nano SiO2, graphene slurry, polydimethylsiloxane, epoxy-terminated polydimethylsiloxane, a urea-formaldehyde prepolymer, a silane coupling agent, sodium dodecyl benzene sulfonate, an FSO-100 fluorocarbon surfactant, a CTBN adhesive, a curing agent, an epoxy accelerator DMP-30 and a diluent. Through the collaborative design of the gradient structure of the hard framework and the soft coating, low-surface-energy filler chemical anchoring, microcapsule local material supplementing and thermal triggering dynamic bond rearrangement, the board obtains balance among the bearing strength, long-term hydrophobicity, weather-proof barrier and repeatable thermal self-repairing; and meanwhile, the common defects that room-temperature self-repairing is difficult to realize, hydrophobic particles are easy to agglomerate, a coating is easy to layer and the like are avoided.

The invention relates to a poly-(2-oxazoline) epoxy derivative and application thereof, and belongs to the technical field of crosslinking. The invention provides a poly-(2-oxazoline) epoxy derivative, which is completely different from existing cross-linking agents such as 1, 4-butanediol diglycidyl ether (BDDE), divinyl sulfone, glycidyl methacrylate and the like in structure, and has the advantages that the structure is simple; the polymer can be used as a cross-linking agent for cross-linking natural high-molecular polymers such as polysaccharide (such as hyaluronic acid) and protein and synthetic high-molecular polymers such as polyethylene glycol and polyvinyl alcohol. Compared with an existing cross-linking agent, the poly-(2-oxazoline) epoxy derivative has the advantages that the poly-(2-oxazoline) epoxy derivative can be easily subjected to a cross-linking reaction with high-molecular polymers such as hyaluronic acid, the prepared cross-linked substances such as sodium hyaluronate gel are more stable and uniform, the performance of the prepared cross-linked substances is easier to regulate and control and the like, and the poly-(2-oxazoline) epoxy derivative has a great application prospect.

The invention relates to the technical field of polyurethane acrylate, and particularly discloses dual-curing polyurethane acrylate resin and a preparation method thereof. Wherein the dual-curing polyurethane acrylate resin is prepared from the following raw materials: polyester polyol, polyether polyol, diisocyanate, hydroxyl acrylate, a chain extender, a photoinitiator, cardanol glycidyl ether, a polymerization inhibitor and modified nanoparticles. Wherein the citric acid and the polyethyleneimine are adopted to carry out synergistic modification on the nano particles, the dispersion stability of the nano particles is improved, so that the mechanical property of the resin is improved, the cardanol glycidyl ether and the photoinitiator generate a synergistic effect, and the resin can be quickly shaped through photocuring promoted by the photoinitiator; the cardanol glycidyl ether participates in the subsequent thermocuring reaction, so that the curing effect is improved, and the adhesive force between the film layer and the base material is enhanced.

The invention discloses a quick-curing polyurethane seamless expansion joint material for roads and a preparation method, and belongs to the technical field of road engineering materials. The material is prepared from polyether polyol, polycaprolactone glycol, a bisphenol A epoxy-polyether block isocyanate terminated prepolymer, a methyl phenyl silicon-boron hybrid hydroxyl chain extender, diphenylmethane diisocyanate, calcium carbonate, wollastonite, a hindered amine anti-aging agent and dioctyl phthalate. Wherein the bisphenol A epoxy-polyether block isocyanate terminated prepolymer is prepared by the following steps: reacting bisphenol A with epoxy chloropropane to generate epoxy resin, reacting with polytetramethylene ether glycol, and introducing isophorone diisocyanate; the methyl phenyl silicon-boron hybrid hydroxyl chain extender is prepared by carrying out hydrosilylation and ethylene glycol reaction on methyl trimethoxy silane, 3-glycidyl ether oxypropyl trimethoxy silane and allylboronic acid pinacol ester; and the methyl phenyl silicon-boron hybrid hydroxyl chain extender is prepared by carrying out hydrosilylation on methyl trimethoxy silane, 3-glycidyl ether oxypropyl trimethoxy silane and allylboronic acid pinacol ester. The material has the advantages of quick curing property, weather resistance and high-temperature stability, and is suitable for road seamless expansion joint scenes.

The invention discloses compression-resistant glass and a preparation method thereof, and relates to the technical field of special glass. When the compression-resistant glass is prepared, an anorthite crystal phase is used as a main material, a wollastonite crystal phase is used as an auxiliary material, and zinc, barium, boron, sodium, antimony and titanium elements are added, so that the compression-resistant glass ceramic is prepared; the preparation method comprises the following steps: mixing tetraethoxysilane, zirconium oxychloride octahydrate and 3-glycidyl ether oxypropyl trimethoxy silane, adding hydrochloric acid, and stirring to obtain modified sol; the preparation method comprises the following steps: mixing hydroxyl-terminated polysiloxane, trimethyl ethyoxyl silane, methyl triethyoxyl silane and octadecyl triethyoxyl silane, adding a hydrochloric acid solution, and reacting to prepare an organosilane modified solution; mixing the modified sol and the organosilane modified solution, coating the surface of the compression-resistant microcrystalline glass with the mixture, and curing to obtain the compression-resistant glass. The compressive glass prepared by the invention has the advantages of high compressive strength, hydrophobicity, wear resistance and high surface hardness.

The invention relates to the technical field of fabric waterproofing agents, in particular to a polyurethane modified organic silicon fluoride-free waterproofing agent and a preparation method thereof. The polyurethane modified organic silicon fluoride-free waterproof agent is prepared from the following raw materials in parts by mass: 5 to 15 parts of hexamethylene diisocyanate, 5 to 15 parts of butyl acrylate, 1 to 5 parts of methyl methacrylate, 40 to 60 parts of octamethylcyclotetrasiloxane, 10 to 30 parts of alpha, omega-dihydroxy polydimethylsiloxane and 5 to 10 parts of gamma-aminopropyl methyl diethoxy silane. The invention relates to a silane coupling agent, which is prepared from the following raw materials in parts by weight: 1 to 5 parts of glycidyl ether oxypropyl trimethoxy silane, 0.1 to 1 part of tetramethylammonium hydroxide, 0.1 to 1 part of triethylamine, 2 to 5 parts of tetraethoxysilane, 0.2 to 0.75 part of ammonia, 0.1 to 1 part of silane coupling agent KH-570, 0.01 to 0.1 part of dibutyltin dilaurate, 1 to 5 parts of epsilon-caprolactam, 1 to 2 parts of emulsifier and 0.1 to 1 part of initiator. The fabric treated by the method has good softness and excellent hydrophobic effect.

The invention relates to the field of polyurethane film materials for batteries, and discloses a TPU composite material for a new energy battery and a preparation method of the TPU composite material. A TPU composite material for a new energy battery is composed of a cloth film layer, an adhesive film layer and a TPU film layer, the TPU film layer is prepared by melting and casting TPU hot melt adhesive, and the TPU hot melt adhesive is prepared from the following raw materials in parts by weight: 60-80 parts of polyurethane elastomer, 20-30 parts of a toughening aid, 15-25 parts of a flame retardant, 8-15 parts of a heat conducting agent, 2-4 parts of a lubricant and 1-3 parts of an antioxidant; the toughening auxiliary agent is prepared from a POE (Polyolefin Elastomer), long carbon chain alkyl glycidyl ether, dibutyl itaconate and a vinyl dimethyl terminated dimethyl-methyl trifluoropropyl polysiloxane copolymer. The TPU composite material disclosed by the invention is applied to a new energy battery, has relatively good buffering and damping effects and puncture resistance, and is good in flame retardance and thermal conductivity.

The invention discloses a polyurethane modified epoxy resin adhesive as well as a preparation method and application thereof, and the polyurethane modified epoxy resin adhesive is prepared from the following components in parts by mass: 7-10 parts of E51 type bisphenol A diglycidyl ether, 3.5 parts of a phenolic aldehyde amine T31 curing agent and 1-3 parts of synthetic polyurethane, the synthetic polyurethane is prepared from polyether triol, polyether amine, isophorone diisocyanate and glycerol carbonate, and a blending system of the synthetic polyurethane and bisphenol A diglycidyl ether is adopted to be subjected to covalent crosslinking with phenolic aldehyde amine T31, so that the adhesive has high toughness and strength guarantee; the synthetic polyurethane prepared by the method is obtained through simple, green and efficient solvent-free synthesis, and the synthesized product has certain fluidity at room temperature, so that the subsequent stirring preparation process of an adhesive is facilitated. And a solvent-free synthesis method is adopted, so that the use of a toxic organic solvent in the traditional polyurethane synthesis process is avoided, and the synthesis process is greener.

The invention belongs to the technical field of plastic processing, and particularly relates to a hydrophobic solvent-resistant biodegradable polyester material as well as a preparation method and application thereof in plastic bottles. The preparation method of the hydrophobic solvent-resistant biodegradable polyester material comprises the following steps: reacting polyol glycidyl ether with acrylic acid to prepare polyol glycidyl ether acrylate; the preparation method comprises the following steps: reacting isophthalic dihydrazide with polyol glycidyl ether acrylate to prepare a modifier; pBAT reacts with a modifier and an acrylic acid fluorine monomer to obtain the hydrophobic solvent-resistant biodegradable polyester material. The hydrophobic solvent-resistant biodegradable polyester material adopts PBAT as matrix resin, has biodegradability, has good hydrophobicity and solvent resistance through modification treatment of the modifier and the acrylic acid fluorine monomer, and can be applied to manufacturing of plastic bottles.

The invention discloses a high-temperature-resistant and weather-resistant epoxy resin adhesive and a preparation method thereof, and belongs to the field of epoxy resin adhesives, the adhesive can keep stable bonding strength for a long time at high temperature through the synergistic effect of hydrogenated bisphenol F type epoxy resin, silicon-containing phenyl glycidyl ether epoxy resin and a dicyandiamide-imidazole composite curing agent, and the adhesive has high temperature resistance and weather resistance. According to the present invention, the graphene aerogel is added to the silicon-containing phenyl glycidyl ether epoxy resin to meet the high temperature environment use requirement, and the silica bond in the silicon-containing phenyl glycidyl ether epoxy resin and the aging resistance of the graphene aerogel enable the adhesive to have characteristics of excellent ultraviolet aging resistance, excellent thermal cycling resistance and excellent moisture resistance, solve the performance defects of the traditional product, and be suitable for the application in the high temperature and severe environment, the method has an important practical value.

The invention relates to the technical field of water treatment, and particularly discloses a crystal nucleus granulation induced hardness removal integrated water treatment process which comprises the following steps: firstly, ultrasonically dispersing nano-hydroxyapatite in deionized water, adding gamma-glycidoxypropyltrimethoxysilane for reaction, and treating to obtain a silanized hydroxyapatite crystal nucleus; the sodium polyacrylate reacts with aluminum sulfate and the like in an ethylene glycol solution to prepare the composite inducer. The preparation method comprises the following steps: reacting the two components in a phosphate buffer solution in proportion to obtain inducer-loaded crystal nucleus particles, carrying out multi-step reaction and treatment on the inducer-loaded crystal nucleus particles with calcium chloride and the like to obtain surface-coated crystal nucleus granulation bodies, and mixing the surface-coated crystal nucleus granulation bodies with cationic polyacrylamide and nano-zinc oxide to prepare the reinforced hardness removal agent. When to-be-treated water is treated, the reinforced hardness removal agent is added, stirring and precipitation are performed, supernate sequentially passes through the activated carbon filter column to adsorb impurities and is sterilized by the ultraviolet disinfection device, and finally effluent is collected, so that the hardness in the water can be efficiently removed, the process integration level is high, and the effect is good.

The invention discloses a strong-hydrophobicity chromatographic stationary phase modified by a covalent triazine skeleton containing an octyl chain as well as a preparation method and application of the strong-hydrophobicity chromatographic stationary phase. Activated silica gel is modified by utilizing a silane coupling agent, so that gamma-glycidyl ether oxypropyl trimethoxy is introduced into the surface of the silica gel; and performing in-situ growth of a covalent triazine skeleton layer containing an octyl chain through a Schiff base condensation reaction to prepare the strong-hydrophobicity chromatographic stationary phase. A covalent triazine skeleton containing a hydrophobic octyl chain in the structure is used for modifying the surface of silica gel, and a bonding phase contains a triazine ring, a benzene ring, an octyl chain and an amino group. According to the stationary phase, a hydrophobic long octyl chain is introduced into a bonding unit of CTF, so that the structure, morphology and performance of the CTF are changed, a'flower-on-sphere 'morphology is formed, and the stationary phase has a rigid porous structure, adjustable hydrophilicity / hydrophobicity, a rich pi electron system, strong hydrophobicity and good separation selectivity for non-polar compounds, and can be widely applied to separation of various samples.

The invention relates to the technical field of adhesives, and provides a wet state maintaining type vegetable protein adhesive as well as a preparation method and application thereof. The hyperbranched catechol polymer adhesive filler disclosed by the invention is prepared by carrying out ring-opening reaction on epoxy groups of neopentyl glycol diglycidyl ether and pentaerythritol tetraglycidyl ether and amino groups of dopamine hydrochloride. Meanwhile, the vegetable protein adhesive is prepared from vegetable protein, a cross-linking agent and the adhesive filler according to a certain proportion. According to the adhesive filler and the corresponding vegetable protein adhesive, the defect that in the prior art, a bio-based adhesive, especially a vegetable protein adhesive, is poor in product performance due to poor moisture retention can be overcome.

The invention discloses an LED (light-emitting diode) pouring sealant which is prepared from the following components: alicyclic epoxy resin, a glycidyl ether toughening agent, a thermal initiation cation curing agent, an anhydride curing agent and the like. A rigid ring structure of the alicyclic epoxy resin and a flexible chain segment of the anhydride curing agent are subjected to ring-opening reaction to form a three-dimensional cross-linked network; the alicyclic epoxy resin and the anhydride curing agent are combined to form an interpenetrating polymer network, the anhydride curing agent is further crosslinked through an esterification reaction in a high-temperature stage to form a high-density interpenetrating network, and the structure not only retains the weather resistance of the alicyclic epoxy resin, but also relieves internal stress through a flexible chain segment of anhydride, so that the volume shrinkage rate after curing is reduced to 0.5% or below; meanwhile, a glycidyl ether toughening agent is inserted into double networks through long-chain ether bonds to form tough nodes, crack propagation is inhibited, and the comprehensive performance of the colloid is remarkably improved by combining an anhydride curing agent vacuum dehydration and staged curing process.

The invention relates to an ultra-low VOC baking type quick-drying coating and a preparation method thereof, and belongs to the technical field of coatings. The coating is prepared from the following components: composite hybrid resin, methylated melamine formaldehyde resin, neopentyl glycol diglycidyl ether, trimethylolpropane triacrylate, composite filler, zinc fatty acid, fumed silica, a silane coupling agent KH-560, aminoethyl aminopropyl polydimethylsiloxane and the like. The composite hybrid resin is prepared by adopting a special method; the composite hybrid resin is matched with methylated melamine formaldehyde resin, neopentyl glycol diglycidyl ether, trimethylolpropane triacrylate, a composite filler, zinc fatty acid, fumed silica, a silane coupling agent KH-560, aminoethyl aminopropyl polydimethylsiloxane and other components according to a certain proportion for use, and has the advantages of low VOC emission, quick drying during baking, high heat resistance, high heat resistance, high heat resistance, high heat resistance, high heat resistance, high heat resistance and the like. Meanwhile, the adhesive force is good, the hardness and the flexibility are balanced, and the chemical resistance is excellent.

The invention relates to a marine epoxy resin composite material. The marine epoxy resin composite material is characterized by comprising the following components in parts by mass: 100 parts of epoxy resin, 20-30 parts of a curing agent, 100-120 parts of a reinforcing material, 2050 parts of hollow microsphere filler and 5-15 parts of a flame retardant, the epoxy resin is one or a mixture of two of bisphenol A type epoxy resin, bisphenol F type epoxy resin, polyphenol type glycidyl ether epoxy resin or aliphatic glycidyl ether epoxy resin. When in use, the marine epoxy resin composite material disclosed by the invention has the advantages of excellent comprehensive performance, corrosion resistance, flame retardance, water resistance, high strength, light weight and the like, still has excellent performance retention rate after being soaked in water for several days, and is more suitable for complex and severe working conditions on a ship.

The invention belongs to the technical field of high polymer materials, and particularly relates to a PET decorative film and a preparation method thereof. The preparation method comprises the following steps: synthesizing hydroxyl-terminated hyperbranched polyester by taking pentaerythritol and 2, 2-dimethylolpropionic acid as raw materials, and reacting with polyol glycidyl ether to prepare an epoxy-terminated organic modifier; silver-loaded nano silicon dioxide subjected to surface treatment by an amino silane coupling agent is used as inorganic functional particles; pET resin, an organic modifier and inorganic functional particles are subjected to melt blending and extrusion granulation, and modified PET is prepared; the modified PET is prepared into the film through a two-way stretching process. Epoxy groups of the organic modifier chemically react with amino groups at the tail end of a PET molecular chain and on the surfaces of inorganic particles respectively, a stable organic-inorganic hybrid network is constructed, synergistic improvement of reinforcement, toughening and long-acting antibiosis is achieved, and the technical problems that functional particles are not uniform in dispersion, interface bonding is weak, and antibacterial components are prone to migration are effectively solved.

The invention discloses a DA bond polymer with antibacterial and self-repairing functions for a wood surface as well as a preparation method and a use method of the DA bond polymer. Chitosan serves as a wall material, cinnamon essential oil serves as a core material, the cinnamon essential oil and chitosan antibacterial microcapsules are prepared through emulsification, crosslinking and spray drying, and essential oil controlled release is achieved. Then bisphenol A diglycidyl ether DGEBA and furfuryl alcohol FA are used as raw materials, furyl functional epoxy resin FER is prepared under the catalysis of triethylamine TEA, bismaleimide BMI is added, and a DA bond self-repairing polymer is prepared through a DA reaction; and adding 4, 4-diaminodiphenylmethane DDM into the system, reacting with redundant DGEBA to generate a cross-linked polymer network, and adding the microcapsules into a DA bond semi-interpenetrating self-repairing network solution to obtain the DA bond polymer. A thin film formed by brushing and curing wood has antibacterial and self-repairing functions, scratches and microcracks on the surface of the wood can be repaired, and microbial erosion is inhibited.

A photoelectric composite cable for an underwater buoy, and a preparation process therefor. A polyurethane, a self-repairing polyurethane prepolymer, and a composite nano zinc oxide are selected as an outer sheath base material. A modified polysiloxane having a B-O six-membered ring dynamic cross-linked network and a long-chain alkane group and an amino is introduced into the self-repairing polyurethane prepolymer; 5,5'-methylenedisalicylaldehyde and isophorone diisocyanate are together subjected to stepwise polymerization with the modified polysiloxane, and the 5,5'-methylenedisalicylaldehyde is cross-linked with diphenylmethane diisocyanate to obtain a self-repairing polyurethane prepolymer; and nano zinc oxide is subjected to a modification treatment, wherein dodecyltrimethoxysilane and 3-glycidoxypropyltrimethoxysilane are used for dual modification, such that super-hydrophobic nano zinc oxide having good thermal stability and high dispersity is prepared in a toluene system.

The invention discloses a single-component high-heat-resistance type epoxy adhesive and a preparation method of the single-component high-heat-resistance type epoxy adhesive. The adhesive is prepared from the following components in parts by weight: 30 to 40 parts of N, N-4, 4 '-diphenylmethane bismaleimide; 50 parts of bisphenol F epoxy resin; 36.47 parts of 4, 4 '-diaminodiphenyl sulfone; 20 to 40 phr of phenyl glycidyl ether; 1 to 2 phr of two terminal type epoxy silicone oil; 4 to 6 phr of hydroxyl-terminated polyether sulfone; 10 to 20 phr of boron nitride, the surface of which is modified by gamma-glycidyl ether oxypropyl trimethoxy silane; and 1 to 3 phr of an adhesion promoter. According to the adhesive disclosed by the invention, the heat resistance, the mechanical property, the dimensional stability, the process adaptability and the like are synergistically improved, the use requirements of an aviation structural part on long-term service at 150-180 DEG C and an electronic packaging device on the condition of short-time reflow soldering at about 200 DEG C can be met, and the reliability of the adhesive in a high-temperature environment is remarkably improved.

The invention belongs to the technical field of ultra-thin glass, and particularly relates to a folding screen protector and a preparation process thereof. The folding screen protector sequentially comprises a functional base film layer, a thermosetting resin film layer, a UTG layer, a thermosetting resin film layer and an OCA adhesive film layer from top to bottom. A layer of photocureable coating added with modified silicon dioxide and methallyl polyhedral oligomeric silsesquioxane is sprayed on PET resin to serve as a functional base film, and a rigid phenyl group is introduced into a molecular structure of a thermosetting resin film; according to the invention, methyltrimethoxysilane, phenyltrimethoxysilane and 3-glycidyl ether oxypropyl trimethoxysilane are adopted as monomers for co-polymerization to obtain high-transparency polysiloxane as an OCA adhesive, so that the bending performance and the impact resistance of the folding screen protector are effectively improved.

The invention relates to an aliphatic copolyester elastomer and a preparation method thereof, and belongs to the field of high polymer materials. The elastomer is prepared through a series ring-opening copolymerization reaction of epoxide and cyclic anhydride, and the method comprises the following steps: under the action of a metal-free catalyst (a phosphazene ligand P1-tert-octyl / triethyl boron system) and an initiator (terephthalyl alcohol), carrying out a series ring-opening copolymerization reaction on epoxide and cyclic anhydride, the preparation method comprises the following steps: reacting epoxide (such as epoxypropane and allyl glycidyl ether) with aliphatic anhydride (such as glutaric anhydride) in a xylene solvent to generate a polyester prepolymer retaining an active end; adding a second group of epoxide (such as cyclohexene oxide) and anhydride (such as tetrahydrophthalic anhydride and norbornene dianhydride), continuously reacting to form a block copolymer, and then crosslinking. The material performance can be regulated by changing the monomer combination, the atom economy is high, and the raw materials can be produced on a large scale. The process is simple and environment-friendly, and a new choice is provided for application of the degradable elastomer in the fields of medical treatment, environmental protection and the like.

The invention discloses a high-build waterborne epoxy heavy anti-corrosion coating and a preparation method thereof. The coating is a water-based, double-component and room-temperature self-drying type product and is prepared from water-based epoxy resin, modified amine emulsion, castor oil polyglycidyl ether, pigment filler, anti-rust pigment, a cosolvent, water and a functional additive. Due to the adoption of a special amine curing system and an auxiliary material compatibility scheme, the obtained coating is high in solid content in volume, quick to dry, capable of realizing thick coating construction, resistant to chemicals, resistant to corrosion and capable of being attached to multiple base materials, and is a thick-paste water paint suitable for heavy-duty anticorrosion fields such as petrifaction, maritime work, energy, bridges and the like.

The invention discloses a two-component epoxy pouring sealant as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The bi-component epoxy pouring sealant comprises a component A and a component B. The component A comprises the following raw materials: 60-100 parts of modified epoxy resin; 5-25 parts of a reactive diluent; 1 to 10 parts of nano silicon dioxide; the component B comprises the following raw materials in parts by mass: 50-60 parts of an alicyclic amine curing agent; 20-30 parts of a polyether amine curing agent; 10 to 15 parts of methyl tetrahydrophthalic anhydride; 3-5 parts of a silane modifier; 0.1 to 0.5 part of a defoaming agent; the modified epoxy resin is prepared by carrying out esterification reaction on bisphenol A type epoxy resin and long-chain fatty acid for modification and then carrying out graft modification with polypropylene glycol diglycidyl ether. In addition, the invention also provides a preparation method of the two-component epoxy pouring sealant. The epoxy pouring sealant provided by the invention has excellent bonding performance on non-polar plastics such as PP / PE and the like.

The invention relates to an early-strength water reducing agent as well as a preparation method and application thereof. The synthesis of the early-strength water reducing agent comprises two steps of polymerization reaction of low-molecular-weight polycarboxylic acid and ring-opening esterification reaction of polyether glycidyl ether. According to the low-molecular-weight polycarboxylic acid, unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic acid and itaconic acid are used as raw materials, and the low-molecular-weight polycarboxylic acid with the molecular weight of 1000-5000 is synthesized through water-phase free radical polymerization; and then carrying out ring-opening esterification reaction on the low-molecular-weight polycarboxylic acid and polyether glycidyl ether to synthesize the ester type polycarboxylic acid water reducer with a comb-shaped molecular structure. Compared with the prior art, the early-strength water reducing agent and the preparation method thereof have the performance advantages of simple synthesis process, high esterification rate and good early-strength effect.

The invention discloses a peracetylated polysaccharide derivative mixing accelerator as well as a preparation method and application thereof, and relates to the technical field of polysaccharide derivatives. Alkyl polyglucoside and glycidyl ether are subjected to etherification reaction to obtain polysaccharide derivatives; and adding acetic anhydride and an organic weak base catalyst into the polysaccharide derivative, and carrying out esterification reaction to obtain the peracetylated polysaccharide derivative. The obtained peracetylated polysaccharide derivative can be used for reducing the minimum miscible pressure of CO2 in an offshore oilfield. The polysaccharide derivative provided by the invention is simple in synthesis process, and the molecular activity of the polysaccharide derivative can be regulated and controlled by changing the number of carbon dioxide-philic groups and the length of oleophylic unsaturated hydrocarbon chains, so that the polysaccharide derivative can be used in the CO2 oil displacement process of oilfield exploitation, and the minimum miscible pressure in the CO2 oil displacement process is effectively reduced.