83 results about "Phenolic amine" patented technology

The application discloses a kind of ship super-long anticorrosion special nano powder coating, preparation method and application, belong to ship heavy anticorrosion material technical field.The preparation method of the ship super-long anticorrosion special nano powder coating is as follows: epoxy resin, graphene modified epoxy resin, core-shell structure ZnO@SiO2, modified 2,5-dimercapto-1,3,4-thiadiazole, borosilicate glass powder, flaky boron nitride, silane coupling agent modified silica, phenolic amine curing agent, 2-ethyl-4-methylimidazole, fumed silica, defoaming agent, ultraviolet absorber, high-temperature pigment are put into stirrer and stirred for 20-30min, then melt extrusion is carried out through double screw extruder, the extrusion temperature is 90-110 DEG C, grinds and sieves, and the ship super-long anticorrosion special nano powder coating is obtained.The coating prepared by the application has good anticorrosion performance and can be applied in the field of ship metal surface corrosion protection.

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 relates to the technical field of coatings, in particular to a corrosion-resistant coating material and a preparation method thereof. The corrosion-resistant coating material comprises the following components in parts by mass: 80-100 parts of epoxy resin, 5-20 parts of a modified phenolic aldehyde amine curing agent, 2-5 parts of a waterproof agent, 5-10 parts of a corrosion inhibitor and 40-55 parts of a lubricant. The modified phenolic aldehyde amine curing agent is obtained by carrying out Mannich reaction on phenol, thymol, aliphatic polyamine and formaldehyde. The phenol provides a rigid benzene ring structure, and endows a cured product with good heat resistance and chemical resistance. Thymol improves the flexibility and adhesive force of the cured product and enhances the hydrophobicity of the cured product at the same time. The epoxy resin and the modified phenolic aldehyde amine curing agent are polymerized, the waterproof agent, the corrosion inhibitor and the lubricant are wrapped, and the obtained coating material has good adhesive force and corrosion resistance.

The invention relates to the technical field of functional coatings, in particular to a graphene reinforced heavy-duty epoxy coating for a marine environment. The invention discloses a graphene-based epoxy resin coating which is prepared from the following raw materials in parts by weight: 60-80 parts of bisphenol A epoxy resin, 5-10 parts of aminated graphene-carbon nanotube composite powder, 3-6 parts of zinc-aluminum-cerium ternary composite phosphate, 3-6 parts of nano boron nitride / silicon dioxide core-shell particles, 15-25 parts of a polyamide-epoxy curing agent, 1-3 parts of a silane coupling agent KH-560 and 5-8 parts of cashew nut shell oil modified phenolic aldehyde amine. The anti-rust paint is prepared from the following components in parts by weight: 0.5-2 parts of carboxylated graphene quantum dots, 2-4 parts of organic montmorillonite, 0.1-0.5 part of a fluorocarbon surfactant, 8-15 parts of a composite anti-rust pigment and 10-20 parts of an organic solvent. The coating is excellent in corrosion resistance, capable of resisting marine corrosion for a long time, resistant to high temperature and resistant to cathodic disbonding, has the functions of aging tracing and biological adhesion resistance, is convenient to construct and stable in performance, and provides reliable protection for ocean engineering.

The invention discloses a lignin-based epoxy anticorrosive paint and a preparation method thereof. The anticorrosive paint is prepared by mixing a lignin-based epoxy anticorrosive paint component, a lignin-based phenolic amine curing agent and a diluent. According to the lignin-based epoxy anticorrosive paint disclosed by the invention, on one hand, a lignin epoxy resin acetylation modification method based on lipase is introduced, and the content of hydrophilic groups is reduced, so that formation of a compact lignin cross-linked network structure is promoted, and the barrier ability, heat resistance and aging resistance of an anticorrosive coating on a chemical medium are improved on the resin level; on the other hand, lignin and furfural are respectively used for partially replacing phenol and paraformaldehyde to prepare a lignin-based phenolic aldehyde amine curing agent with high chemical inertness, so that the protection effect of a coating in an extreme corrosion environment and the adhesive force to a metal base material are improved on the curing agent level. The lignin-based epoxy anticorrosive paint prepared by the invention has good corrosion resistance, aging resistance, thixotropy and adhesive force.

The invention discloses a modified microfiltration membrane for enriching biological particles and a preparation method and application thereof, and belongs to the technical field of biological separation.The preparation method of the modified microfiltration membrane comprises the following steps that a mixed cellulose ester microfiltration membrane is provided and subjected to alkali liquor activating treatment; placing the activated membrane in a weakly alkaline buffer solution for balancing; the preparation method comprises the following steps: in a weakly alkaline buffer solution, firstly contacting the surface of the membrane with a tannic acid solution to carry out a first reaction, and then directly adding a polyethyleneimine solution to carry out a second reaction under the condition of not replacing a system, so as to form a phenol-amine cross-linked network on the surface of the membrane in situ; sodium cyanoborohydride is continuously added for reduction stabilization treatment, and the modified microporous filter membrane is obtained. The modified microporous filter membrane prepared by modifying the microporous filter membrane with tannic acid and polyethyleneimine can realize one-step synchronous enrichment of all negatively charged targets, and the problems of target loss, efficiency loss and the like caused by a multi-step process are avoided from the source.

The present application belongs to the technical field of protective coating, and relates to a protective coating with reverse enhanced adhesion, a preparation method and application thereof. The protective coating is composed of component A and component B. The preparation raw materials of component A include water-based epoxy resin emulsion, cashew phenol glycidyl ether, wetting penetrant and defoaming agent. The preparation raw materials of component B include phenolic amine curing agent, alicyclic amine curing agent, dopamine, 2,4,6-tris(dimethylaminomethyl)phenol and pigment filler. The dopamine and the phenolic amine curing agent and the alicyclic amine curing agent are grafted under the action of 2,4,6-tris(dimethylaminomethyl)phenol to form a modified curing agent. The coating has low requirements for surface treatment, high adhesion in dry and humid environments and presents the characteristics of "reverse enhanced adhesion".

The application discloses a kind of organic silicon modified amine epoxy curing agent and preparation method thereof, the curing agent structure is composed of organic silicon, phenol, amine structure, preparation method includes the following steps: (1) the phenolic compound of double bond substituent group, catalyst and hydrogen-containing silicone oil are stirred and mixed uniformly under 50~75 ℃ nitrogen atmosphere, then heated to 65~90 ℃ and react for 4~6h, then solvent is removed by evaporation to obtain organic silicon modified phenol;(2) polyamine, organic silicon modified phenol, aldehyde compound and solvent are mixed uniformly, stirred uniformly under 50~75 ℃ nitrogen atmosphere, then refluxed and react for 2~4h, after solvent is removed by evaporation to obtain organic silicon modified amine epoxy curing agent.The application solves the problem that the bonding performance of epoxy adhesive is poor in humid or underwater environment, effectively improves the bonding performance of epoxy adhesive in seawater, freshwater and other underwater environment, and provides technical support for the bonding and sealing of moisture-resistant and heat-resistant electronic packaging, deep-sea underwater marine equipment and facilities.

The application relates to the technical field of paint, in particular to a two-component epoxy strong-acid-and-strong-base-resistant heavy-duty paint and a preparation method thereof, which comprises a main paint and a curing agent, the main paint contains a compounded system of bisphenol A epoxy resin and bisphenol F epoxy resin, a composite diluent, a functional filler synergized by flaky glass flake and spherical filler, a silane coupling agent and a special anti-rust pigment; the curing agent is compounded by polyamide, phenolic amine, modified alicyclic amine and modified aliphatic amine, the paint has high solid content and low VOC, has strong adhesion to various substrates, has a bottom-surface-combined function in a single coating layer, is resistant to strong acid, strong base and extreme corrosive environment, is simple to construct, is fast to cure and has a long service life.

The invention discloses an oil pipeline plugging material and a preparation method and application thereof.The plugging material comprises epoxy resin, a curing agent, a reinforcing phase, a toughening agent and corrosion-resistant filler, the curing agent is a mixture of phenolic aldehyde amine T31 and 1, 2-dimethylimidazole, the reinforcing phase is a mixture of basalt fibers and gradient-size walnut shell powder, and the toughening agent is a mixture of phenolic aldehyde amine T31 and 1, 2-dimethylimidazole. And the corrosion-resistant filler adopts paraffin coated metal powder. The plugging material is remarkable in plugging effect, free of manual limited space operation, high in safety, simple in technological process and low in requirement for construction equipment, leakage point plugging work can be completed only by preparing a solution, injecting the solution into a leakage point through a glue injection gun and cooling and curing the leakage point at the room temperature, and cost is relatively low.

The invention provides a biomass adhesive and a preparation method thereof. The biomass adhesive comprises an elastomer modified epoxy resin adhesive component A and a biomass phenolic amine curing agent component B, compared with a conventional modification method of directly adding an external plasticizer, the preparation method of the elastomer modified epoxy resin comprises the following steps: pre-polymerizing elastomers such as rubber and a functional monomer, and carrying out ring-opening reaction on the pre-polymerized elastomers and the functional monomer and epoxy groups in liquid glycidyl ether epoxy resin to generate a sea-island structure prepolymer molecule with a preliminary prototype; the modification method can significantly improve the toughness and impact resistance of the prepared epoxy resin adhesive. The elongation at break of the biomass adhesive is larger than 100%, the impact strength can reach 180 KJ / m < 2 >, and the biomass adhesive has the advantages of being high in bonding strength, resistant to corrosion, high in structural strength after curing and the like and has wide application prospects and market potential.

The invention discloses an epoxy splicing adhesive for a low-temperature wind power mixing tower. The epoxy splicing adhesive comprises a component A and a component B. The component A comprises bisphenol A type epoxy resin, bisphenol F type epoxy resin, a reactive diluent, a functional cross-linking agent, an epoxy coupling agent, a thixotropic agent, a flexibilizer, titanium dioxide and filler, and the functional cross-linking agent comprises an olefin cross-linking agent, a functional olefin monomer and a polymerization inhibitor. The component B comprises a phenolic aldehyde amine curing agent, an accelerant, a thixotropic agent, a cross-linking initiator, an amino coupling agent, carbon black and filler; the cross-linking initiator comprises a functional olefin monomer cross-linking agent, an initiator and an initiation accelerant. On one hand, starting from a resin system, the problems of high viscosity and easy crystallization of epoxy resin at low temperature are solved; on the other hand, starting from the design of a curing system, the reaction activity of the epoxy splicing adhesive in a subzero environment is improved, and the epoxy splicing adhesive has good early strength and low-temperature toughness and meets the requirements for fixing and bonding performance of the wind power mixed tower prefabricated duct piece at low temperature.

The invention provides a histone demethylase gene HOVUSG0811000 related to powdery mildew resistance and an application of the histone demethylase gene HOVUSG0811000 related to powdery mildew resistance. The nucleotide sequence of the HOVUSG0811000 is as shown in SEQ ID NO. 1 (sequence identifier number 1). It is found for the first time that HOVUSG0811000 improves the resistance of highland barley to powdery mildew by regulating phenol amine metabolism, and the HOVUSG0811000 has a good application prospect in construction of powdery mildew resistant plant varieties.

The invention relates to the technical field of coating preparation, in particular to a preparation method of kerosene-resistant antibacterial static conductive coating. The invention relates to a preparation method of a kerosene-resistant antibacterial static conductive coating. The kerosene-resistant antibacterial static conductive coating comprises a component A raw material and a component B raw material, the component A is prepared from the following raw materials: novolac epoxy resin, toughened modified resin, a reactive diluent, an auxiliary agent, polyhexamethylene biguanide, an anti-rust filler and a solvent; and the component B comprises the following raw materials: a toughening phenolic aldehyde amine curing agent and an alicyclic amine curing agent. The preparation method of the kerosene-resistant antibacterial static conductive coating has the advantages that the phenomena of bubbling and shedding are avoided, the coating has a protection effect and stable salt spray resistance and surface resistivity, and the static conductive requirement is met. The antibacterial rate is increased, the surface pollution is effectively inhibited, the green chemical industry standard is met, the adhesive force of the coating is improved, the wear resistance is improved, and high toughness can be kept in a low-temperature state.

The invention discloses a gutta-percha modified second-order reaction epoxy adhesive and a preparation method thereof, the epoxy adhesive is composed of a component A and a component B. The component A comprises epoxidized gutta-percha, liquid epoxy resin, a reactive diluent, an auxiliary agent and the like, and the component B comprises a cardanol modified phenolic aldehyde amine curing agent, a modified polyamide curing agent, vegetable oleic acid, an auxiliary agent and the like. The gutta-percha modified second-order reaction epoxy adhesive disclosed by the invention has the characteristics of second-order reaction characteristic, high flexibility, high bonding strength, greenness, environment friendliness, reproducibility and the like, and is suitable for waterproof bonding between steel and concrete base planes of roads, bridges and the like and asphalt pavement layers.

The invention relates to the technical field of paint, in particular to hollow glass bead high-solid epoxy intermediate paint and a preparation method thereof.The intermediate paint is composed of a component A and a component B. The component A comprises bisphenol A type epoxy resin, hollow glass beads subjected to surface treatment through a silane coupling agent, pigment filler and auxiliaries; the component B is a phenolic aldehyde amine curing agent, the component A and the component B are mixed for use according to the mass ratio of (7-9): 1, hollow glass beads with the specific gravity being 0.9-1.2 g / cm < 2 > are selected, the formula and the technology are optimized, the high-solid epoxy intermediate paint which is low in specific gravity, high in actual volume solid content, thick in paint film and low in cost is successfully prepared, the product can effectively reduce the number of construction paths, labor hours and cost are saved, and the cost is reduced. And meanwhile, the coating has excellent adhesive force, wear resistance and corrosion resistance, and is particularly suitable for the field of heavy-duty coating of steel structures such as bridges and the like.

The composition for a coating material according to one embodiment of the present disclosure includes an epoxy resin, a curing agent resin, and a diluting solvent, the curing agent resin including two or more types selected from the group consisting of a polyamide resin, an amide adduct resin, a phenolic amine, and a phenolic amide, and the total content of the diluting solvent in the composition for a coating material is 5 to 20 wt%.

This invention discloses a solvent-free epoxy drinking water paint, relating to the field of coating technology. By weight, it comprises the following components: 100 parts epoxy resin, 12-16 parts silane-modified quaternary ammonium salt, 8-12 parts reactive diluent, 15-20 parts pigments and fillers, 3-4 parts additives, 30-38 parts phenolic amine curing agent, 10-14 parts polyetheramine D230 curing agent, and 2-5 parts accelerator DMP-30. This invention exhibits good adhesion, improved antibacterial properties, and a long-lasting antibacterial effect.

This invention discloses a method for preparing a p-phenylenediamine-functionalized natural graphite-based graphene-like carbon antistatic epoxy self-leveling surface paint. The method includes the following steps: First, natural graphite-like graphene carbon is prepared. p-phenylenediamine is used to functionalize the surface of the graphene-like carbon, which serves as a conductive medium and dispersant. This carbon is then uniformly mixed with epoxy resin to form a p-phenylenediamine-functionalized graphene-like carbon material dispersion. Functional additives, pigments, and fillers are added, and the mixture is dispersed at high speed until homogeneous, completing component B. Then, phenolic amine epoxy curing agent component A is added, and the mixture undergoes reaction and curing to form a paint film, finally yielding the p-phenylenediamine-functionalized natural graphite-based graphene-like carbon antistatic epoxy self-leveling surface paint. The material prepared using this invention exhibits good antistatic properties and is simple to apply and inexpensive. It has broad application prospects in the coating of floors in workshops and venues requiring cleaning and antistatic properties, such as those in the pharmaceutical, electronics, instrumentation, textile, daily chemical, and food industries.

This invention relates to the field of anti-corrosion coating technology, and discloses a low-temperature and moisture-resistant graphene substrate-surface integrated coating and its preparation process. The coating consists of components A and B; component A contains 20-30 parts of mixed epoxy resin, 2-5 parts of reactive diluent, 0.5-2 parts of functionalized rGO powder, 0.2-0.6 parts of pyrene- or naphthalene-containing superdispersant, 5-12 parts of zinc phosphate, 8-15 parts of flake mica powder, and 3-8 parts of mixed solvent; component B is 40-55 parts of cashew phenolic amine curing agent; the grinding fineness of component A is 20-30 μm. The preparation process sequentially includes static pre-impregnation and aging, staged resin coating, high-flow-rate circulating sand milling, and application compounding. This invention utilizes a hydrophobic repulsion mechanism at the interface and a π-π non-covalent anchoring resistance mechanism to achieve single-coat thick coating application in environments of -5~5℃ and RH>85%, with a surface drying time of ≤12.5h, wet adhesion of ≥5.0MPa, and salt spray corrosion diffusion of ≤1.2mm after 2000h. It completely solves the problems of low-temperature flash corrosion, graphene flocculation, and multi-coat application, and is suitable for corrosion protection in marine engineering and polar facilities.

The application discloses a data-driven phenol-amine composite antioxidant screening method and a storage medium. The method comprises the following steps: taking amine antioxidant molecules and phenolic antioxidant molecules as parent bodies, selecting different groups into different sites in each molecular combination, generating new molecules and constructing a virtual molecular library; performing structure optimization on the generated new molecules to obtain the lowest energy spatial configuration thereof; based on the hydrogen atom transfer mechanism and the single electron transfer mechanism of the antioxidant, calculating the frontier orbital energy level difference, the ionization potential and the minimum hydrogen atom partition charge of the new molecules, and taking the three performance indexes as the performance indexes of the antioxidant; according to the three performance indexes, a molecular performance thermodynamic diagram under different molecular core-functional group combinations is drawn, and a representative antioxidant molecule is screened according to the analysis result of the molecular performance thermodynamic diagram. Through the above method, high-performance phenol-amine composite antioxidants can be quickly and efficiently designed and screened.

The invention relates to the technical field of coating preparation, in particular to a preparation method of an economical high-build solvent-free cyclic hydrogen coating which is formed by mixing a component A and a component B according to the mass ratio of 2: 1-5: 1. The component A comprises bisphenol F epoxy, bisphenol A epoxy, a wetting dispersant, benzyl alcohol, an epoxy active diluent, a toughening agent, polyamide wax powder, a defoaming agent, a defoaming agent, silica powder, titanium dioxide, low-oil-absorption talcum powder, a silane coupling agent and polyether phosphate; the component B comprises phenolic aldehyde amine, alicyclic amine, a wetting dispersant, a defoaming agent, a defoaming agent, silica powder, titanium dioxide and gas silicon, the paint component A and the component B are low in viscosity after being mixed, airless spraying can be achieved without adding a diluent, the thickness of a single-channel construction dry film can reach 500 m or above, and the paint component B is high in weather resistance. The coating has the advantages of low cost, high construction efficiency, extremely low volatile organic compound content and excellent corrosion resistance, and is particularly suitable for heavy corrosion prevention fields of ship drinking water tanks, large drinking water pipelines, swimming pool inner walls and the like.

The application discloses a polypeptide or protein elution coating and a preparation method and application thereof, and belongs to the technical field of biological and medical materials. The method comprises the following steps: performing first incubation on a substrate by using a mixed solution to form an adhesive gel coating on the surface of the substrate, wherein the mixed solution is obtained by mixing polyphenol and polypeptide or protein in an acidic solution system; and performing second incubation on the adhesive gel coating by using a polyamine or polythiol alkaline solution, and in-situ chemical cross-linking of the adhesive gel coating is realized through phenolamine chemistry, so that a solid coating with a highly phenolamine network structure wrapping polypeptide or protein is obtained. The method realizes preparation of a functional polypeptide or protein elution coating with adjustable and controllable multi-scene application, the polypeptide or protein elution coating formed through the above method has the characteristics of wide-spectrum modification, is independent of the material quality of the substrate, and has the stability of chemical structure.

The invention relates to the technical field of high polymer materials, and discloses a fiberboard material and a preparation method thereof.The preparation method comprises the following steps that epoxy resin, an epoxy flame retardant and cardanol modified polyphenylene sulfide are added into a mixing machine and stirred for 30-40 min at the temperature of 40-50 DEG C, then esterified straw is added, stirring continues for 20-30 min, a premix is obtained, and the fiberboard material is obtained; adding a phenolic aldehyde amine curing agent into the premix, quickly stirring for 3-5 minutes, paving on a mold, performing hot pressing for 20-30 minutes at the pressure of 8-15 MPa and the temperature of 100-120 DEG C, molding, cooling and demolding to obtain the fiberboard material. The fiberboard material prepared by the invention has good water resistance, stain resistance, oil resistance and flame retardance.

The application relates to an active packaging film and a preparation method and application thereof, and the preparation method is as follows: preparing essential oil@polydopamine capsules by self-polymerization oxidation under alkaline conditions; preparing a soybean protein isolate solution; preparing a carboxymethyl cellulose solution; blending and configuring essential oil@polydopamine capsules, the soybean protein isolate solution, the carboxymethyl cellulose solution and a plasticizer into a film-forming solution, performing vacuum degassing, adopting a solution casting method to form a film, demolding after drying, and obtaining the active packaging film. Compared with the prior art, the preparation method adopted by the application is simple in operation, non-toxic and harmless, low in cost, the polydopamine capsules are covalently combined with the soybean protein isolate and the carboxymethyl cellulose to form a cross-linking network structure such as a phenolic amine, and the prepared active packaging film has good mechanical properties, antioxidant properties, antibacterial properties and degradability, and has potential application value in the field of food packaging and preservation.

The invention discloses a high-temperature-resistant pneumatic hose and a preparation method thereof, and relates to the technical field of hoses. Polyurethane is modified by adding sulfhydrylated silicon carbide, so that the wear resistance of polyurethane is enhanced. The epoxy coating is prepared by using the novolac epoxy resin, the talcum powder, the dodecafluoroheptyl methacrylate and the cashew nut oil modified phenol amine curing agent as main raw materials, the surface of the pneumatic hose is coated with the epoxy coating, a high-temperature-resistant coating is formed after curing, and the high-temperature-resistant performance of the pneumatic hose is improved. According to the invention, 3-mercaptopropyltrimethoxysilane is used for modifying silicon carbide, and at the moment, a mercapto group on the silicon carbide and dodecafluoroheptyl methacrylate in the epoxy coating can be subjected to a mercapto-olefin click reaction, so that the coating is more firmly attached to the surface of the pneumatic hose; therefore, the wear resistance and the high temperature resistance of the pneumatic hose are enhanced.

The application discloses a solvent-free epoxy coal tar anticorrosive paint and a preparation method thereof. The paint comprises component A and component B. The component A comprises the following components: 1 part by weight of bisphenol A type epoxy resin with an epoxy equivalent of 180-190 g / eq, and 0.3-0.4 parts by weight of bisphenol A type epoxy resin with an epoxy equivalent of 200-240 g / eq. The component B comprises the following components: 1 part by weight of cashew phenol oil modified phenolic amine, 0.1-0.3 parts by weight of cashew nut shell oil modified alicyclic amine, and 0.3-0.5 parts by weight of modified phenolic amine. The paint has a service life of 1.5 h at room temperature and a service life of 1 h at 50 DEG C, solves the problem of explosive polymerization of the solvent-free epoxy coal tar paint when the gun is temporarily stopped during spraying, does not need to flush the pipeline with a diluent during hoisting and piping during the spraying process, improves construction efficiency, and reduces cost. The paint has low-temperature (5 DEG C) curing performance, has good drying performance during winter construction, has a coating salt water resistance of more than 3000 h, and has a chlorine ion penetration resistance of less than 1.0*10 ‑3 mg / (cm 3 d). The application discloses a solvent-free epoxy coal tar anticorrosive paint and a preparation method thereof. The paint comprises component A and component B. The component A comprises the following components: 1 part by weight of bisphenol A type epoxy resin with an epoxy equivalent of 180-190 g / eq, and 0.3-0.4 parts by weight of bisphenol A type epoxy resin with an epoxy equivalent of 200-240 g / eq. The component B comprises the following components: 1 part by weight of cashew phenol oil modified phenolic amine, 0.1-0.3 parts by weight of cashew nut shell oil modified alicyclic amine, and 0.3-0.5 parts by weight of modified phenolic amine. The paint has a service life of 1.5 h at room temperature and a service life of 1 h at 50 DEG C, solves the problem of explosive polymerization of the solvent-free epoxy coal tar paint when the gun is temporarily stopped during spraying, does not need to flush the pipeline with a diluent during hoisting and piping during the spraying process, improves construction efficiency, and reduces cost. The paint has low-temperature (5 DEG C) curing performance, has good drying performance during winter construction, has a coating salt water resistance of more than 3000 h, and has a chlorine ion penetration resistance of less than 1.0*10

The application relates to the technical field of high polymer materials, and particularly discloses a high-strength polyethylene monofilament based on multiphase synergistic modification and a preparation method thereof. The method comprises the following steps: constructing a mussel-biomimetic phenolic amine coating on the surface of ultra-high molecular weight polyethylene (UHMWPE) powder by oxidative self-polymerization of epigallocatechin gallate (EGCG) and polyamide-amine dendritic polymer (PAMAM); melting, blending, granulating, surface-modified UHMWPE, high-density polyethylene (HDPE), an antioxidant, a lubricant and hydrophobic nano-SiO2 according to a specific weight ratio; and finally, obtaining the finished product through optimized melt spinning, multi-stage heat stretching and heat setting processes. Through the integrated design of interface modification, multiphase synergy and structure orientation, the problems of poor melt processing fluidity and insufficient compatibility among components of UHMWPE are solved, the diameter of the prepared monofilament is 0.08-0.25 mm, the strength reaches 10-25 cN / dtex, the monofilament has excellent mechanical properties and processing stability, the process is simple, the cost is controllable, the monofilament is suitable for large-scale production, and the monofilament can be widely applied to high-end fields such as marine ropes, protective nets and cut-resistant products.

The invention relates to the technical field of powder coatings, in particular to a bio-based epoxy resin anticorrosive powder coating and a preparation method thereof. The problem that in the prior art, high bio-based content and corrosion resistance of a powder coating cannot be considered at the same time is solved. The powder coating is prepared from modified epoxy resin, rosin-based epoxy resin, a modified bio-based phenolic aldehyde amine curing agent and titanate modified composite filler, rigid-tough balance of the coating is realized through a long-chain structure of dimer acid and a rigid framework of rosin; the amino-terminated silicon oil modified curing agent is utilized to endow the surface of the coating with low surface energy hydrophobic property; graphene is loaded on biochar, and an in-situ grafting technology in a step-by-step temperature control extrusion process is combined, so that a compact anti-corrosion barrier is constructed; the preparation method solves the problems of high brittleness and poor water resistance of bio-based coatings, and is suitable for heavy-duty anticorrosion fields of pipelines, marine facilities and the like.

The utility model discloses a double-layer filter screen component for phenolic aldehyde amine curing agent production, which comprises a material guide cylinder, a clamping groove, a bearing disc, a filter screen and a connecting component, the clamping groove is arranged in the material guide cylinder, the bearing disc is inserted in the clamping groove in a sliding manner, and the filter screen is arranged on the bearing disc. The material guiding device has the advantages that the connecting assembly is arranged, the positioning rod in the connecting assembly is in butt joint with the positioning hole, the bearing disc can be rapidly clamped and locked in the clamping groove, and then the bearing disc and the material guiding barrel can be rapidly disassembled and assembled conveniently; meanwhile, a transmission rod in the connecting assembly is in linkage in a sliding groove in an end opening of a limiting cylinder, so that an abutting joint head can rotate synchronously, the abutting joint head pushes an abutting joint plate to enable a positioning rod and a positioning hole to be in butt joint and separated rapidly, and meanwhile through the limiting and locking effect between the abutting joint head and a clamping seat, the clamping seat can be clamped rapidly. The firmness of clamping connection between the bearing disc and the material guide barrel is further improved, and the bearing disc is prevented from being separated from the material guide barrel.