20 results about "Polyamide epoxy" patented technology

The application relates to the papermaking technical field, and particularly discloses a paper pulp papermaking reinforcing agent and a preparation method thereof, which comprises the following raw materials in parts by weight: polyamide epoxy chloropropane resin 10-20 parts, silicon dioxide 1-2 parts, polyvinyl alcohol 1-5 parts, crosslinking agent 0.1-1 part, deionized water 120-150 parts, modifier 0.5-2 parts, wherein the modifier contains fluorine elements, silicon elements and organic amine groups in a molecular structure, and the dry tensile property, the wet tensile property, the folding resistance, the flame resistance and the wet / dry tensile index ratio of the paper pulp reinforcing agent are improved, and the paper pulp papermaking reinforcing agent prepared by the application can be widely applied to paper strengthening and has a wide application prospect.

The invention discloses regenerated high-strength corrugating base paper, a preparation method thereof and a corrugated board for shoe boxes. The preparation method of the corrugating base paper comprises the steps that waste paper pulp is subjected to enzyme modification treatment and pulped, and then cationic starch, a polyamide epichlorohydrin wet strength agent, carboxylated cellulose nanocrystals and alkyl ketene dimer are added and mixed to obtain corrugated paper primary pulp; carrying out papermaking forming on the corrugated paper primary pulp, and carrying out squeezing dehydration and drying to obtain shaped paper; a reinforcing sizing material is applied to the surface of the sizing paper, and the sizing paper is dried and calendered to obtain corrugated base paper; the reinforced sizing material is prepared from 80 to 90 parts of a film-forming reinforcing agent, 3 to 5 parts of carboxylated reduced graphene oxide dispersion liquid, 1 to 2 parts of a carbodiimide cross-linking agent, 1 to 5 parts of a borate coupling agent and 5 to 8 parts of polydimethylsiloxane; the film-forming enhancer comprises a styrene-acrylic emulsion and a carboxylated styrene-butadiene emulsion, so that the obtained corrugating base paper has high strength and excellent moisture resistance, and is suitable for being made into a corrugated board for a shoebox.

The method comprises the following steps: by taking aminopropionitrile rectified high-boiling oil generated in a working section of preparing aminopropionitrile from acrylonitrile during production of VB1 as a raw material, carrying out reduced pressure rectification or in-situ catalytic cracking reduced pressure reaction rectification to obtain a distillate with the mass percentage content of dicyanoethylamine greater than 97% at the yield of 75% or more relative to the mass of the aminopropionitrile rectified high-boiling oil; dissolving the distillate by using an organic solvent, and carrying out catalytic chemical reduction or catalytic hydrogenation under an alkaline condition and in the presence of a catalyst to obtain a reduced material containing dipropylenetriamine, and centrifuging or filtering to separate out the catalyst and insoluble substances; the preparation method comprises the following steps of: adding an organic solvent into a reaction kettle, sequentially distilling to recover the organic solvent, rectifying under reduced pressure, collecting rectified fractions according to a relational expression t = 92.42 + 9.645 / (1.573-lgP) between a boiling point t (DEG C) of a material and a corresponding external pressure P (mmHg) to obtain dipropylenetriamine with the mass percentage content of more than 97%, reacting dipropylenetriamine with phthalic anhydride to generate a polyamide prepolymer, and reacting with epoxy chloropropane to obtain the dipropylenetriamine with the mass percentage content of more than 97%. The polyamide epoxy resin wet strength agent is obtained.

The invention discloses a bamboo fiber paper-based material as well as a preparation method and application thereof, and belongs to the field of biomass chemical engineering technologies and environmental remediation. The preparation method comprises the following steps: grinding a bamboo pulp fiber suspension to obtain mechanically modified bamboo fibers, and adding water into absolutely dry bamboo pulp fibers to prepare a mechanically modified bamboo fiber suspension; the preparation method comprises the following steps: respectively dispersing and dissolving polyethyleneimine and glutaraldehyde in water to obtain a polyethyleneimine solution and a glutaraldehyde solution; mixing the bamboo fibers with a polyethyleneimine solution for reaction, adding a glutaraldehyde solution, continuously stirring, and washing to obtain chemically modified bamboo fibers; and defibering the chemically modified bamboo fibers, adding polyamide epichlorohydrin resin and cationic polyacrylamide, and carrying out papermaking and drying treatment to prepare the bamboo fiber paper-based material. The bamboo fiber paper-based material prepared by the method has super-efficient capturing capability on micro-nano plastics, the removal efficiency reaches 99%, the adsorption capacity reaches 250mg / g, the bamboo fiber paper-based material can be popularized and used on a large scale, and the removal cost is greatly reduced.

The application discloses a polyamide epoxy resin curing agent, a preparation method and application. The curing agent is prepared by reacting raw materials including the following components by weight: a) hydrophobic amine 1-40 parts; b) water-soluble amine 0-30 parts; c) carboxyl or ester group-containing compound 10-40 parts; d) epoxy group-containing polyether 5-40 parts; and e) epoxy group-containing resin / compound 0-40 parts. The application uses hydrophobic amine as a raw material, and adjusts the formula composition to obtain an epoxy resin curing agent with good water solubility. The curing agent has improved water resistance and corrosion resistance when applied to water-based paint based on reduced hydrophilic segments. Meanwhile, the epoxy resin curing agent shows a clear solution form before or after water dispersion, is more conducive to long-term stable storage without flocculation, and has better product application.

The method comprises the following steps: by taking aminopropionitrile rectified high-boiling oil generated in a working section of preparing aminopropionitrile from acrylonitrile during production of VB1 as a raw material, carrying out reduced pressure rectification or in-situ catalytic cracking reduced pressure reaction rectification to obtain a distillate with the mass percentage content of dicyanoethylamine greater than 97% at the yield of 75% or more relative to the mass of the aminopropionitrile rectified high-boiling oil; dissolving the distillate by using an organic solvent, and carrying out catalytic chemical reduction or catalytic hydrogenation under an alkaline condition and in the presence of a catalyst to obtain a reduced material containing dipropylenetriamine, and centrifuging or filtering to separate out the catalyst and insoluble substances; the preparation method comprises the following steps: preparing a raw material into an organic solvent, sequentially distilling to recover the organic solvent, rectifying under reduced pressure, collecting rectified fractions according to a relational expression t = 92.42 + 9.645 / (1.573-lgP) between a boiling point t (DEG C) of the material and a corresponding external pressure P (mmHg) to obtain dipropylenetriamine with the mass percentage of more than 97%, reacting dipropylenetriamine with sebacic acid to generate a polyamide prepolymer, reacting with epichlorohydrin, and obtaining the dipropylenetriamine with the mass percentage of more than 97%. The polyamide epoxy resin wet strength agent is obtained.

The invention discloses a high-performance epoxy zinc-rich primer and a preparation method thereof. The high-performance epoxy zinc-rich primer is composed of a main agent and a curing agent. The main agent comprises waterborne epoxy resin, modified zinc powder, a dispersing agent, an anti-flash-rust agent, organic bentonite, a cosolvent, a base material wetting agent and an adhesion promoter; the curing agent is a water-based polyamide epoxy curing agent aqueous solution; by optimizing the proportion of the components and adopting a special preparation process, the product has excellent adhesive force, salt fog resistance and storage stability; the primer is especially suitable for heavy-duty anticorrosion fields of containers, steel structures, engineering machinery and the like, is simple and convenient to construct and outstanding in environmental protection performance, and solves the technical problems of insufficient adhesive force, poor anticorrosion performance and the like of traditional products.

The invention belongs to the technical field of high polymer materials, and particularly relates to a reversible dynamic polyamide epoxy adhesive and a preparation method thereof. Compared with the prior art, the epoxy resin adhesive has the advantages that amido bonds are introduced into the epoxy resin adhesive through ester-amine condensation polymerization, a polyamide main chain can be formed through cyclic imide, and reversible pyrolysis bonding can be carried out under the condition that a catalyst or an additive is not needed; the polyamide curing agent has higher requirements on heat in the dynamic debonding / rebonding process, meanwhile, the thermal stability is also stronger, side reaction is not generated when the polyamide curing agent is heated, and the obtained material can trigger debonding at high temperature and can keep bonding in a wider temperature range; in addition, by using the polyamide prepolymer as a dynamic curing agent of an epoxy material, more excellent thermal performance and mechanical performance can be obtained. The movement of the dicarboxamide-imide balance upon heating causes the material to produce flowability only in the typical processing temperature range (230 DEG C to 280 DEG C) of the thermoplastic.

The invention relates to the field of epoxy anti-corrosion primer, and discloses waterborne epoxy anti-corrosion primer and a preparation method thereof, and the waterborne epoxy anti-corrosion primer is composed of a component A and a component B, the component A is prepared from the following raw materials in parts by weight: 5-25 parts of water, 1-3 parts of a dispersing agent, 30-40 parts of pigment and filler, 1-8 parts of an anti-rust pigment, 0.1-1 part of a defoaming agent, 0.1-1 part of a pigment and filler wetting agent, 0.5-2 parts of water-based organic bentonite, 30-40 parts of a water-based epoxy emulsion, 0.5-1 part of a base material wetting agent, 0.2-1 part of a cosolvent, 0.5-2 parts of an anti-flash rust agent and 0-0.5 part of a silane coupling agent; the component B is prepared from the following raw materials in parts by weight: 10-40 parts of a water-based polyamide epoxy curing agent, 0-2 parts of nano silicon dioxide aerogel and 60-90 parts of water; the mass ratio of the component A to the component B is (6-12): 1, the salt fog resistance time of the prepared waterborne epoxy anticorrosive primer is higher than that of a contrast, the crosslinking density of the two components is higher, the initial protection is improved by the flash rust inhibitor, and the corrosion inhibition effect of single aluminum triphosphate is better due to the compounding of zinc phosphate and aluminum triphosphate.

The invention relates to acid-free paper, in particular to a preparation method of ultrathin acid-free paper, which comprises the following steps: respectively pulping a bleached sulfate softwood pulp board, a bleached sulfate hemp pulp board and a cotton pulp board under a certain pulping concentration to obtain a fiber pulp suspension; and adding polyamide epichlorohydrin and hydroxyapatite super-long nanowires into the fiber slurry suspension, uniformly mixing, and carrying out automatic papermaking. According to the invention, polyamide epichlorohydrin and hydroxyapatite ultra-long nanowires are added into a fiber slurry suspension, so that the ultra-thin acid-free paper has higher dry and wet strength and flame retardance. According to the preparation method of the ultrathin acid-free paper, 3.0-8.0 g / m < 2 > of the ultrathin acid-free paper can be prepared, and the requirements of being free of acid, ultrathin, transparent, light and tough are met.

The invention belongs to the technical field of pressure-sensitive adhesives, and discloses a silicone rubber-based pressure-sensitive adhesive and a preparation method thereof. The invention relates to a fluorine-containing polyether modified hydroxyl-terminated polysiloxane adhesive, which is prepared from the following ingredients in parts by weight: 45 to 65 parts of fluorine-containing polyether modified hydroxyl-terminated polysiloxane, 3 to 6 parts of alkoxy silane-tributyl boron and titanate compound cross-linking agents, 6 to 12 parts of silane coupling agents KH-602 modified nano aluminum nitride, 12 to 25 parts of silicon resin-hydrogenated rosin glyceride-polyterpene resin ternary compound tackifiers and 0.2 to 1.2 parts of organic zirconium catalysts. 15-35 parts of an environment-friendly mixed solvent; 2-5 parts of a polyether amine-polyamide epoxy curing agent compound; the invention aims to overcome the defects that the existing silicone rubber-based pressure-sensitive adhesive is insufficient in temperature resistance, poor in bonding effect on base materials difficult to adhere, uneven in crosslinking, poor in filler dispersity, insufficient in key component disclosure and the like, and provides the silicone rubber-based pressure-sensitive adhesive which is innovative in component design, controllable in process and excellent in performance and the preparation method thereof.

The invention relates to a soybean meal-based adhesive with high water-retaining property and high initial adhesion and a preparation method thereof, and belongs to the field of artificial board adhesives. The preparation method comprises the following steps: synthesizing a polyamide intermediate containing a flexible chain and an active group by taking adipic acid, maleic anhydride and diethylenetriamine as raw materials, and then reacting with epichlorohydrin to introduce a cross-linked structure and a polar group to prepare modified polyamide epichlorohydrin resin; and compounding the soybean meal with soybean meal and water to obtain the adhesive. Through molecular structure design and process optimization, the resin has high cohesive strength and strong intermolecular force, so that the adhesive has high initial adhesion, excellent water-retaining property and good interface bonding performance at the same time. The product solves the key problems of insufficient adhesiveness, poor water resistance and the like of the traditional soybean meal on the basis of retaining the advantages of bio-based, formaldehyde-free and environment-friendly properties, and has important value for promoting the green and low-carbon development of wood adhesives.

The invention discloses an environment-friendly waterborne epoxy primer containing waterborne waste paint slag, which consists of a component A and a component B in a weight ratio of (3-5): 1, wherein the component A is prepared from the following components: 15%-25% of water-based paint waste residue powder, 40%-45% of water-based epoxy resin, 0.2%-0.5% of a wetting agent, 1.0%-2.0% of a dispersing agent, 0.3%-0.8% of a flatting agent, 0.2%-1.0% of a defoaming agent, 0.5%-1.0% of a thixotropic agent, 10.0%-20.0% of pigment and filler, 2.0%-7.0% of an ether solvent and the balance of water; and the component B consists of a water-based polyamide epoxy curing agent and an ether solvent. The environment-friendly waterborne epoxy primer disclosed by the invention has excellent adhesive force, chemical resistance, collision resistance and salt spray resistance. According to the method, the water-based waste paint slag is effectively recycled, so that the environmental pollution is reduced, and the resource circulation is realized.

The application relates to the technical field of industrial coatings, in particular to a salt-fog-resistant water-based industrial paint and a preparation method thereof. The salt-fog-resistant water-based industrial paint comprises components A and B with a mass ratio of (12-15):1. The component A comprises the following components: a cationic water-based epoxy resin, a water-based acrylic modified epoxy resin, a pH regulator, an amphoteric surfactant, mica powder, nano zinc oxide, a silane coupling agent, a polyether modified siloxane, a wet dispersant and deionized water. The component B comprises the following components: a polyamide epoxy curing agent, 2-ethyl-4-methyl imidazole, propylene glycol methyl ether acetate and deionized water. The cationic water-based epoxy resin and the water-based acrylic modified epoxy resin are compounded, the salt-fog resistance is maintained, the weather resistance is improved, and the salt-fog-resistant water-based industrial paint is suitable for rust prevention on a metal surface.

The application relates to a preparation method of high-performance high-flexibility formaldehyde-free impregnated film paper and application thereof, and belongs to the technical field of impregnated film paper. The application aims to solve the problems that the existing impregnated film paper cannot simultaneously have high strength, high toughness, crack resistance, scratch resistance, wear resistance and formaldehyde-free release, and the low adhesive transparency influences the paper texture. Preparation: 1, adjusting the pH of polyamide epoxy chloropropane resin; 2, preparing polyvinyl alcohol / melamine adhesive; 3, impregnating the decorative base paper in the polyamide epoxy chloropropane resin after the pH is adjusted, then drying to obtain primary impregnated paper, and then impregnating the primary impregnated paper in the polyvinyl alcohol / melamine adhesive at room temperature, and then drying to obtain high-performance high-flexibility formaldehyde-free impregnated film paper. Application: the high-performance high-flexibility formaldehyde-free impregnated film paper is used as a veneer material of artificial board.

The invention discloses a preparation method of a cellulose nanofiber-poly-zwitter-ion high-strength composite gel material for bifunctional synergetic marine antifouling, which comprises the following steps: dissolving polyamide epichlorohydrin resin in a cellulose nanofiber dispersion liquid, freeze-drying to obtain cellulose aerogel, and preparing a cellulose nanofiber-poly-zwitter-ion high-strength composite gel material containing sulfobetaine methacrylate, N, N-dimethyl formamide and poly-zwitter-ion. The preparation method comprises the following steps: preparing a pre-polymerized mixed solution of N, N-methylene bisacrylamide, 2-hydroxy-1-[4-(2-hydroxyethoxy) phenyl]-2-methyl-1-acetone and polyhexamethylene biguanide hydrochloride, soaking cellulose aerogel in the pre-polymerized mixed solution, and polymerizing in a mold to obtain a cellulose nanofiber-poly-zwitter-ion composite hydrogel material; the mass concentration of cellulose nanofibers in the cellulose nanofiber dispersion liquid is 0.8 wt%-1.0 wt%, and the concentration of polyhexamethylene biguanide hydrochloride in the pre-polymerized mixed liquid is 0.05 wt%-0.1 wt%. Based on the excellent mechanical property and efficient marine antifouling property of the composite hydrogel, the marine antifouling application as long as 6 months in a real marine environment is realized.

The present invention discloses a high-adhesion, ultra-heavy anti-corrosion coating technology. The ultra-heavy anti-corrosion coating consists of two parts: component A and component B. Component A includes the following raw materials by weight: 40-60 parts epoxy resin, 5-10 parts modified polyarylether nitrile, 1-15 parts diluent, 1-10 parts functional filler, 1-15 parts pigment, and 0.1-3 parts auxiliary agent; and component B includes the following raw materials by weight: 5-25 parts polyamide epoxy curing agent, 5-25 parts phenalkamine epoxy curing agent, and 0.1-3 parts accelerator. The present invention, through a special molecular structure design and a rational combination of functional fillers, can form a dense, dry, and stable protective layer, and significantly improve the adhesion between the coating and the substrate, thereby providing long-term and effective protection for metal structures.

The present invention provides a method for preparing a novel epoxy resin curing agent. A compound containing a terminal dicarboxyl group is synthesized using a thiol-vinyl addition reaction, and then subjected to a polycondensation reaction with ethylenediamine to obtain a polyamide containing a spirocyclic structure as an epoxy resin curing agent. Compared with existing polyamide curing agents, the curing agent prepared by the present invention has a spirocyclic and thioether bond structure that can better improve the toughness of the cured product, and has the characteristics of polyamide curing agents, such as room temperature curing and high adhesion of the cured product.

The method comprises the following steps: by taking aminopropionitrile rectified high-boiling oil generated in a working section of preparing aminopropionitrile from acrylonitrile during production of VB1 as a raw material, carrying out reduced pressure rectification or in-situ catalytic cracking reduced pressure reaction rectification to obtain a distillate with the mass percentage content of dicyanoethylamine greater than 97% at the yield of 75% or more relative to the mass of the aminopropionitrile rectified high-boiling oil; dissolving the distillate by using an organic solvent, and carrying out catalytic chemical reduction or catalytic hydrogenation under an alkaline condition and in the presence of a catalyst to obtain a reduced material containing dipropylenetriamine, and centrifuging or filtering to separate out the catalyst and insoluble substances; the preparation method comprises the following steps of: adding an organic solvent into an organic solvent, sequentially distilling to recover the organic solvent, rectifying under reduced pressure, collecting rectified fractions according to a relational expression t = 92.42 + 9.645 / (1.573-lgP) between a boiling point t (DEG C) of a material and a corresponding external pressure P (mmHg) to obtain dipropylenetriamine of which the mass percentage content is greater than 97%, reacting dipropylenetriamine with adipic acid to generate a polyamide prepolymer, and reacting with epoxy chloropropane to obtain the dipropylenetriamine. The polyamide epoxy resin wet strength agent is obtained.

The method comprises the following steps: by taking aminopropionitrile rectified high-boiling oil generated in a working section of preparing aminopropionitrile from acrylonitrile during production of VB1 as a raw material, carrying out reduced pressure rectification or in-situ catalytic cracking reduced pressure reaction rectification to obtain a distillate with the mass percentage content of dicyanoethylamine greater than 97% at the yield of 75% or more relative to the mass of the aminopropionitrile rectified high-boiling oil; dissolving the distillate by using an organic solvent, and carrying out catalytic chemical reduction or catalytic hydrogenation under an alkaline condition and in the presence of a catalyst to obtain a reduced material containing dipropylenetriamine, and centrifuging or filtering to separate out the catalyst and insoluble substances; the preparation method comprises the following steps of: adding an organic solvent into a reaction kettle, sequentially distilling to recover the organic solvent, rectifying under reduced pressure, collecting rectified fractions according to a relational expression t = 92.42 + 9.645 / (1.573-lgP) between a boiling point t (DEG C) of a material and a corresponding external pressure P (mmHg) to obtain dipropylenetriamine of which the mass percentage content is greater than 97%, reacting dipropylenetriamine with terephthalic acid to generate a polyamide prepolymer, and reacting with epoxy chloropropane to obtain dipropylenetriamine of which the mass percentage content is greater than 97%. The polyamide epoxy resin wet strength agent is obtained.