14results about How to "High functionality" patented technology

The application discloses an end hexaazido nitrate polyether adhesive and a synthesis method thereof. The method first takes triazido neopentyl alcohol and glycidyl ether nitrate as raw materials, boron trifluoride-ether complex as a catalyst, and obtains triazido neopentyl polyglycidyl ether nitrate alcohol through cation ring-opening polymerization reaction; then takes triazido neopentyl polyglycidyl ether nitrate alcohol and hexamethylene diisocyanate as raw materials, dibutyl tin dilaurylate as a catalyst, and obtains end hexaazido polyglycidyl ether nitrate through addition reaction, namely the end hexaazido nitrate polyether adhesive. The application is mainly used for solid propellants, is used for synthesizing polytriazole elastomers, improves the content and crosslinking density of hard segments, promotes microphase separation of the elastomers, and thus improves mechanical properties.

The invention discloses a biphenyl type polythiol compound and a preparation method and application thereof, the biphenyl type polythiol compound has a structural general formula as follows: # imgabs0 #, R1 and R2 are adjacent substituent groups on a benzene ring, R1 is mercaptopropyl, R2 is mercaptoalkoxy of C2-C18, f1m and f2n are other substituent groups on the benzene ring, and f1m and f2n are different substituent groups on the benzene ring. F1 and f2 are respectively and independently selected from any group except an organic metal group and a nucleophilic group, and m and n are respectively selected from any integer of 0-3. The sulfydryl alkyl and sulfydryl alkoxy ortho-substituted biphenyl type polythiol compound is prepared from the low-cost raw material biphenol, and the preparation method is simple, efficient, high in controllability, low in cost and suitable for batch preparation. When the ortho-substituted biphenyl polythiol compound is used as a curing agent, not only can low-temperature curing of a resin composition be realized, but also the bonding strength, heat and humidity resistance, mechanical property and waterproof property of cured resin can be remarkably improved.

The invention provides an epoxy curing agent as well as a preparation method and application thereof. The preparation method of the epoxy curing agent comprises the following steps: carrying out first reaction on a first mixed reaction system containing amino siloxane and a chain extender to obtain an intermediate product of which the main chain contains a-Si-O-Si-bond and the side chain contains amino; performing a second reaction on a second mixed reaction system containing the intermediate product and a cross-linking agent to obtain the epoxy curing agent, wherein the cross-linking agent comprises an acid cross-linking agent. A coating film formed by the epoxy resin coating containing the epoxy curing agent has excellent high temperature resistance and good flexibility.

The present invention relates to the technical field of epoxy resin curing agents, and provides a trifunctional modified imidazole curing agent, a preparation method thereof, and an application thereof. The present invention introduces a benzene ring group having good compatibility with epoxy resin into the structure of the modified imidazole curing agent, and at the same time increases the functionality of the curing agent, thereby improving the curing degree of the epoxy resin and improving the mechanical properties of the cured product. The trifunctional modified imidazole curing agent provided by the present invention has a low curing temperature and a high hardness of the cured product, and has very important application significance in the field of low-temperature curing of epoxy powder coatings. The present invention also provides a preparation method of the trifunctional modified imidazole curing agent described in the above scheme, which adopts the glycidyl ether of the triphenol methane structure and the common imidazole curing agent as the main raw materials to prepare the trifunctional modified imidazole curing agent, which has low cost, simple process, and is suitable for industrial production.

The invention belongs to the technical field of synthesis of functional perfluoropolyether carboxylic acid, and particularly discloses a method for preparing perfluoropolyether carboxylic acid by using perfluoropolyether oil, which comprises the following steps: by using relatively cheap inert perfluoropolyether oil as a raw material, carrying out catalytic cracking by using a magnesium-based catalyst to obtain an expensive active perfluoropolyether single-ended carboxylic acid product. The magnesium-based catalyst has high selectivity on the active perfluoropolyether single-ended carboxylic acid product, the whole synthesis process is simple in process, mild in reaction condition and easy to operate, and the target product active perfluoropolyether single-ended carboxylic acid is high in proportion, large in functionality, wide in application range and extremely high in added value of the product and has high market economic benefits.

The invention discloses a silane-modified polyether sealant and a preparation method thereof. The invention belongs to the technical field of sealants. The invention prepares a product which is not only environmentally friendly but also has good adhesion and coating properties, and is weather-resistant and durable through the preferred combination of various components. The preparation method of the invention has the characteristics of simple process and safety, and the prepared product can be used for bonding and sealing in the fields of construction, home decoration, transportation, equipment manufacturing, etc.

The invention discloses an anti-fouling auxiliary agent and an application thereof in an ultraviolet curing coating. The anti-fouling auxiliary agent is specifically fluorine-containing light-cured hyperbranched polyester containing acrylic ester. Under the irradiation of ultraviolet light, double bonds of acrylate in the assistant structure can be crosslinked and cured with double bonds of acrylate resin and acrylate monomers in the coating to form a coating with excellent hydrophobic and oleophobic properties, so that the coating has an excellent anti-fouling effect.

The invention discloses a flexible easy-to-form 3D printing photosensitive resin and a preparation method thereof, and the flexible easy-to-form 3D printing photosensitive resin comprises the following components in parts by weight: 20-60 parts of a polyurethane acrylate oligomer, 0-50 parts of an acrylate oligomer, 10-80 parts of mono-functional and polyfunctional acrylate, 0.05-10 parts of a photoinitiator and 0.05-5 parts of an auxiliary agent. The invention has the following beneficial effects: when the acrylate oligomer is subjected to a photocuring reaction, the material has relatively high functionality and rigidity, after curing and molding, the material has relatively rigid performance, a high printing success rate is ensured, and through high temperature (120 DEG C) treatment, Diels-Alder reverse reaction occurs, part of chemical bonds are broken, the material hardness is reduced, and thus, the material has a very good application prospect. The toughness is improved.

The invention belongs to the technical field of organic synthesis, and particularly relates to an addition product of alkyl free radicals and a capture reagent as well as an addition method and application of the addition product. Dissolving secondary alkyl ethylbenzene A, a capture reagent B, an acridinium salt photocatalyst and an additive into an organic solvent, and carrying out an illumination reaction to obtain an addition product of the alkyl free radical and the capture reagent; wherein the structural general formula of the secondary alkyl ethylbenzene A is # imgabs0 # formula I; the capture reagent B is selected from at least one of # imgabs1 # imgabs2 # TsCN; the structural formula of the addition product of the alkyl free radical and the capture reagent comprises at least one of # imgabs3 #. The invention provides a method for oxidizing secondary alkyl ethylbenzene through single electron transfer to induce the secondary alkyl ethylbenzene to generate carbon-carbon bond breakage and react with a capture reagent to generate a product. Reactants and raw materials are easy to obtain, the reaction process is safe and controllable, the operation is simple, and the production cost is low. And the addition product has high functional group property and is more diversified in application.

The utility model discloses multifunctional chemical reagent metering equipment which comprises a transparent metering cup and further comprises a weighing mechanism located at the bottom of the transparent metering cup. The accurate measuring mechanism is located in the center of the bottom of the transparent measuring cup; according to the scheme, by arranging the accurate measuring mechanism, a chemical reagent can be fully stirred conveniently, so that the liquid level height of the reagent can be accurately indicated and marked while the medicine is fully dissolved, and therefore the situation that a measuring result deviates due to insufficient dissolution of a medicine bottle and deviation of a visual angle is avoided; therefore, the purposes that a worker can conveniently and accurately check the height of the liquid level of the chemical reagent according to the indicated and marked positions and then accurately measure the volume of the chemical reagent are achieved, the weighing mechanism is arranged, the chemical reagent can be conveniently and accurately weighed, other equipment does not need to be adopted for weighing, and the working efficiency is improved. Therefore, the purpose of further improving the functionality of the equipment is achieved.

The invention belongs to the technical field of composite coiled materials, and particularly relates to a high-wear-resistance and mildew-proof wood-bamboo composite coiled material and a preparation method thereof. The high-wear-resistance and mildew-proof wood-bamboo composite coiled material sequentially comprises a hydrophobic modified bamboo powder layer, a mildew-proof puffed cork powder layer and a hydrophobic modified bamboo powder layer from top to bottom. According to the invention, hyperbranched polyurea with a three-dimensional spherical structure is synthesized, a large number of cavities exist in molecules, and numerous amino groups and ureido groups with high reaction activity are distributed on the periphery of the hyperbranched polyurea, and the hyperbranched polyurea is subjected to bio-based modification through vanillin; the prepared vanillin modified hyperbranched polyurea adhesive is introduced into a wood-bamboo composite coiled material with high wear resistance and mildew resistance, and hydrophobic bamboo powder and mildew-resistant cork powder can be firmly combined into a high-strength and durable integral coiled material by virtue of high bonding strength brought by a hyperbranched structure of the vanillin modified hyperbranched polyurea adhesive and an enhancement function introduced by the vanillin, so that the strength of the coiled material is greatly improved.

The invention discloses a high-load polyurethane microporous elastomer and its preparation method and application, belonging to the technical field of polyurethane resin. Its technical scheme is: composed of component A and component B, wherein: component A is composed of high-functionality high-activity polyether polyol, polyether polymer polyol, chain extender, foam leveling agent, catalyst, foaming agent, component B is polyester polyol-modified isocyanate, component A and component B are mixed in a ratio of 100: (90-110) to prepare a low-speed and durable solid tire. The high-load polyurethane microporous elastomer provided by the present invention has a higher load characteristic, is suitable for high-load low-speed engineering vehicle solid tires, and has a significant advantage of durability.

The present application provides a method for generating and capturing alkyl free radicals, and its products and applications of the products, the method comprising the following steps: subjecting primary alkyl ethylbenzene and a capturing agent to a light catalytic reaction under photocatalytic conditions; the structure of primary alkyl ethylbenzene is as follows: the capturing agent contains an unsaturated bond or an electron-withdrawing group. The method for generating and capturing alkyl free radicals provided in the present application uses primary alkyl ethylbenzene as a reaction substrate, oxidizes alkyl ethylbenzene by single electron transfer, and then induces carbon-carbon bond breakage under photocatalytic conditions to generate alkyl free radicals, and then the alkyl free radicals react with the capturing agent for synthesis, which significantly reduces the production cost of preparing such captured products and greatly expands the designability and application prospects of such compounds.

The application discloses a low-loss resin composition containing active ester, a prepreg and a copper-clad plate, and the resin composition contains the following main components in parts by weight: 30-70 parts of an epoxy resin, 30-70 parts of an epoxy curing agent, 0-3 parts of a curing accelerator, and 20-100 parts of a filler; wherein the epoxy curing agent is a tetraphenol fluorenyl active ester; the prepreg is prepared by immersing glass cloth in glue liquid formed by the low-loss resin composition, and then baking the glass cloth in an oven at 80-200 DEG C for 1-20 min; and the copper-clad plate is prepared from the prepreg, and the fluorine-containing tetrafunctional active ester is synthesized by esterification reaction of tetraphenol fluorene and pentafluorobenzoyl chloride, and the rigid fluorene ring structure is introduced, which is helpful to improve the thermal performance of the cured epoxy composite material; and the application effectively solves the problem of insufficient heat resistance of the resin composition used for preparing the copper-clad plate, and the amount of the filler is increased to meet the requirement of low polarity, the interface compatibility of the resin and the filler is poor, and the dielectric loss is further improved.