17 results about "Ethyl cyanoacrylate" patented technology

The invention relates to the technical field of oil and gas field development, in particular to well cementation self-healing cement paste and a preparation method thereof. The concrete is prepared from the following components in parts by weight: 4 to 6 parts of repairing agent, 41 to 53 parts of cement, 18 to 22 parts of silica fume, 0.1 to 0.5 part of basalt fiber, 1 to 5 parts of expanding agent, 0.3 to 0.9 part of fluid loss agent, 0.2 to 0.4 part of bentonite, 1.7 to 2.3 parts of naphthalene sulfonate formaldehyde condensate, 0.1 to 0.2 part of simethicone and 1 to 3 parts of retarder, wherein the repairing agent is formed by modifying ethyl cyanoacrylate, candelilla wax and 3-isocyanate propyl trimethoxy silane according to the mass ratio of 1: (1-2): (0.1-0.3). According to the invention, ethyl cyanoacrylate is used for repairing micro cracks of cement, candelilla wax and nano silicon dioxide are used for carrying out microencapsulation to protect ethyl cyanoacrylate, and methoxy groups of 3-isocyanate propyl trimethoxy silane enhance the interface bonding force between microcapsules and a cement slurry system, so that the service life of a cement structure is effectively prolonged.

The invention relates to the technical field of medical suturing agents, and discloses a medical suturing agent for trauma and surgery and a preparation method thereof.The preparation method comprises the steps that 80 g of alpha-cyanoacrylate isobutyl ester, 0.4 g of acrylonitrile-butadiene rubber, 0.2 g of p-toluene sulfonic acid, 2 mg of hydroquinone and 20 mg of tert-butyl hydroxy anisd are weighed and evenly mixed in a 500 ml three-necked bottle; and adding the alpha-ethyl cyanoacrylate to 100g, stirring until the solution is clear and transparent, setting the filling amount of the medical suture agent to be 0.5 ml / bottle, aseptically filling the medical suture agent into a 1ml ampoule bottle, and carrying out lamp inspection, lettering and packaging to obtain a finished product. The medical suture agent disclosed by the invention is used for anastomosis of wounds in trauma and surgical operations, has the advantages of good stability, high bonding strength, high anastomosis speed, no whitening, good toughness, high yield, no toxicity, in-vivo degradation and no three causes, and has certain functions of stopping bleeding, relieving pain and inhibiting bacteria.

The present invention provides a fluorine-containing silicone resin modified matrix material and a preparation method and application thereof. The method of the present invention comprises the steps of: dissolving trifluoropropyltrimethoxysilane in an organic solvent a, dripping an aqueous solution of an acid catalyst, and stirring evenly after the dripping is completed; standing for reaction, and then filtering, washing, and drying to obtain a fluorine-containing silicone resin; dissolving the fluorine-containing silicone resin and ethyl cyanoacrylate in an organic solvent b to obtain a coating modification liquid B; applying the coating modification liquid B on the surface of a substrate, and drying to obtain the obtained material. The present invention consumes less raw materials, and the preparation method is simple and easy, with low energy consumption and low cost; a variety of substrates can be subjected to performance optimization treatment; the modified material has good mechanical and chemical stability, which greatly improves the service life of the material, wherein the modified sponge has a great improvement in hydrophobicity, and has potential applications in the fields of oil-water separation or water pollution resistance.

The invention discloses a masonry hole rapid layering repairing composite material and method based on solid waste, and belongs to the technical field of building material repairing and solid waste recycling. The composite material is composed of 10-30 parts of alpha-ethyl cyanoacrylate (ECA) and 1-30 parts of alkaline solid waste powder, such as combustion ash powder CAP and alkaline residue powder SRP. The repairing method comprises the steps that after holes are cleaned, a layering process is adopted, an alkaline powder layer with the thickness of 2-3 mm is firstly filled, then ECA is poured to infiltrate the holes and initiate second-level curing, and operation is cycled till the holes are filled. According to the invention, high alkalinity of industrial solid waste is utilized to initiate rapid polymerization of ECA, and the solid waste is used as a reinforcing filler; by optimizing the layering thickness, the technical problems of incomplete internal curing, concentrated heat release, generation of pores and layering and the like during large-volume repair are effectively solved, and ultra-rapid forming, high early strength, excellent interface bonding performance and overall compactness of the prosthesis are realized. The method is simple in process, green, economical, high in field adaptability and particularly suitable for rapid in-situ repair of cement-based materials and red brick masonry.

The present invention relates to the technical field of oil and gas field development, and specifically relates to a self-healing cement slurry for well cementing and a preparation method thereof. The self-healing cement slurry comprises the following components: 4-6 parts by weight of a repair agent, 41-53 parts by weight of cement, 18-22 parts by weight of silica fume, 0.1-0.5 parts by weight of basalt fiber, 1-5 parts by weight of an expansion agent, 0.3-0.9 parts by weight of a fluid loss reducer, 0.2-0.4 parts by weight of bentonite, 1.7-2.3 parts by weight of a naphthalene sulfonate formaldehyde condensate, 0.1-0.2 parts by weight of dimethyl silicone oil, and 1-3 parts by weight of a retarder; wherein, the repair agent is modified by ethyl cyanoacrylate, candelilla wax and 3-isocyanatopropyltrimethoxysilane in a mass ratio of 1:1-2:0.1-0.3. The present invention is designed to use ethyl cyanoacrylate to repair the microcracks of the cement, use candelilla wax and nano-silica to perform microencapsulation to protect ethyl cyanoacrylate, and use the methoxy groups of 3-isocyanatopropyltrimethoxysilane to enhance the interfacial bonding force between the microcapsules and the cement slurry system, thereby effectively extending the service life of the cement structure.

This utility model relates to the technical field of filling devices, and in particular to a quantitative filling device for ethyl α-cyanoacrylate. It not only facilitates the uniform filling of ethyl α-cyanoacrylate into packaging bottles via spiral blades, preventing the ethyl α-cyanoacrylate from solidifying and clogging the pipes, but also facilitates automatic loading and unloading of packaging bottles, improving work efficiency. The device includes a detection mechanism; it also includes a feeding mechanism, a storage mechanism, a filling mechanism, and a sealing mechanism. The feeding mechanism is installed on the detection mechanism and feeds the packaging bottles; the storage mechanism is installed on the detection mechanism and stores the ethyl α-cyanoacrylate; the filling mechanism is installed on the storage mechanism and stirs and conveys the ethyl α-cyanoacrylate; and the sealing mechanism is installed on the detection mechanism and facilitates the control of ethyl α-cyanoacrylate discharge.

The utility model provides a continuous condensation production device for ethyl alpha-cyanoacrylate, which belongs to the technical field of chemical production and comprises a first reaction kettle, a second reaction kettle, a third reaction kettle and a fourth reaction kettle which are sequentially connected in series through pipelines, a first material transfer pump is arranged on a communicating pipeline between the first reaction kettle and the reaction kettle, a second material transfer pump is arranged on a communicating pipeline between the second reaction kettle and the third reaction kettle, and a third material transfer pump is arranged between the third reaction kettle and the fourth reaction kettle; a fourth material transfer pump is arranged on a discharge pipeline of the fourth reaction kettle; the first reaction kettle is used as a feeding kettle, and a paraformaldehyde inlet and a liquid material inlet are further formed in the top of the first reaction kettle. According to the utility model, the plurality of reaction kettles are connected in series, different reaction kettles have different functions, and the two reaction kettles transfer materials through the material transfer pump, so that the continuous production of the alpha-ethyl cyanoacrylate is realized, and the production efficiency and the equipment utilization rate can be greatly improved.

The application discloses a lithium-sulfur battery gel electrode based on PECA-N slow release polymerization and a preparation method thereof, relates to the technical field of lithium-sulfur battery preparation, and is characterized in that, in the technical route of pre-freezing and low-temperature polymerization, the slow release polymerization of ethyl cyanoacrylate is realized by taking nitrogen-methyl pyrrolidone as an initiator, and the obtained polymer polyethyl cyanoacrylate (PECA-N) is used to prepare a gel electrode, so that the utilization rate of sulfur and the performance of the battery can be obviously improved, the stability of the electrode structure and the cycle life are greatly enhanced, and the occurrence of the "shuttle effect" is obviously slowed down.

This invention relates to the field of flexible electronics technology, and more particularly to a sacrificial layer coating solution, its preparation method, sacrificial layer film, and its applications. The raw materials for preparing the sacrificial layer coating solution, by weight percentage, include: 5-14% functional substrate, with the remainder being solvent; the functional substrate exhibits a volatile content ≥95% after being placed at 250°C for 3 minutes. This invention selects ethyl α-cyanoacrylate as the functional substrate and constructs a sacrificial layer coating solution system with excellent coating and curing properties using a mixed solvent of acetone and acetonitrile. This sacrificial layer material possesses the characteristic of rapid and complete vaporization under low laser energy triggering, enabling high-precision pattern transfer with straight edges and minimal burrs, and leaving no significant residue after transfer. This effectively improves transfer accuracy, transfer process efficiency, and the cleanliness of the donor substrate, meeting the requirements for high-precision transfer applications.

The invention relates to the technical field of photoresists, in particular to a preparation method of 2-carboxyl-2-cyano-4-norborninolide-5-methacrylate (2-carboxyl-2-cyano-4-norborninolide-5-methacrylate). The preparation method comprises the following steps: depolymerizing and distilling dicyclopentadiene in sequence to obtain cyclopentadiene; the preparation method comprises the following steps: carrying out polymerization reaction on ethyl 2-cyanoacrylate, a first organic solvent and cyclopentadiene to obtain a methyl ester intermediate; carrying out hydrolysis reaction and first purification treatment on a sodium hydroxide aqueous solution and the methyl ester intermediate to obtain an acid intermediate; carrying out oxidation reaction on formic acid, a hydrogen peroxide solution and the acid intermediate to obtain a bridged ring intermediate; 4-dimethylaminopyridine, a second organic solvent, methacrylic anhydride and the bridged ring intermediate are subjected to an esterification reaction and secondary purification treatment, and a target product is obtained. According to the preparation method, by optimizing a linear reaction process and intensifying step-by-step purification, impurity generation is effectively controlled while conventional reagents and operation are used, and finally, a high-purity target product is simply and conveniently prepared.

The invention discloses a low-whitening ethyl cyanoacrylate adhesive composition and a preparation method thereof, and relates to the technical field of instant dry adhesives. The low-whitening ethyl cyanoacrylate adhesive composition is prepared from the following components in parts by weight: 80 to 88 parts of alpha-ethyl cyanoacrylate, 1.2 to 4.0 parts of a cyanoacetamide volatile anchoring agent, 5.0 to 12.0 parts of a low vapor pressure cyanoacrylate monomer, 0.055 to 0.38 part of a stabilizer and 2.0 to 7.0 parts of a thickening agent. According to the low-whitening ethyl cyanoacrylate adhesive composition provided by the invention, the whitening phenomenon can be remarkably reduced, and the main monomer is still alpha-ethyl cyanoacrylate, so that the quick positioning, high shear strength and good adhesive property to various substrates of the traditional ECA adhesive are maintained; the comprehensive performance is balanced.

The utility model provides a flexible device for showing fingerprints, which relates to the technical field of trace adjustment, and comprises a flexible silica gel cover, a rear side plate and an inner plate, the rear side plate is arranged below the flexible silica gel cover, the inner plate is arranged below the interior of the flexible silica gel cover and is connected with the rear side plate, a metal plate is arranged above the inner plate, and the metal plate is connected with the rear side plate. A fan is arranged at one end of the bottom of the metal plate, and a middle round hole is formed in the position, at the air exhaust end of the fan, of the metal plate. The flexible silica gel cover covers the position needing to be displayed, the steam generator is electrified and heated through program control to adjust the humidity in the closed area, then heat is transmitted to the corresponding area of the metal plate to the copper net through the heating plate, liquid alpha-ethyl cyanoacrylate on the copper net volatilizes, the fan blows air flow, and the humidity in the closed area is adjusted. The dense holes and the drilled holes are matched to circulate in the closed space, fingerprint showing is achieved, a fingerprint fuming cabinet is not needed, and on-site use is more convenient.

The application provides a preparation method of a micro seepage model, comprising the following steps: a) sequentially performing surface cleaning, laser engraving and channel cleaning on a PMMA base material to obtain a micro seepage model bottom plate; b) performing mineral cementation on the surface of pores of the micro seepage model bottom plate obtained in step a) by using a mineral cementing agent, and finally performing model packaging by using a packaging adhesive to obtain a micro seepage model; the mineral cementing agent is prepared from raw materials comprising the following components: 8-15 parts by weight of MMA powder; 3-10 parts by weight of alpha-cyanoethyl acrylate; 50-80 parts by weight of dichloromethane; and 3-10 parts by weight of p-methylbenzenesulfonic acid. Compared with the prior art, the preparation method provided by the application jointly cements the acrylic seepage model by physical and chemical processes, can realize high-strength integrated cementation between the bottom plate and the cover plate, has strong complete transparency and visibility and has no seepage influence, and meanwhile, the preparation method has a small influence on the pore geometry.

The invention discloses a lithium-sulfur battery gel electrode based on PECA-N slow-release polymerization and a preparation method thereof, and relates to the technical field of lithium-sulfur battery preparation. Nitrogen-methyl pyrrolidone is used as an initiator, under the technical route of pre-freezing and low-temperature polymerization, the slow-release polymerization of ethyl cyanoacrylate is realized, and the obtained polymer poly (ethyl cyanoacrylate) (PECA-N) is used for preparing the lithium-sulfur battery gel electrode based on PECA-N slow-release polymerization. The gel electrode prepared by the method can obviously improve the utilization rate of sulfur and the performance of the battery, greatly enhance the structural stability of the electrode, prolong the cycle life of the electrode, obviously slow down the shuttle effect, and solve the mechanical stability of the electrode and meet the functional design required by the lithium-sulfur battery from the design angle of the motor structure. And high performance and commercialization feasibility are both considered.

The present disclosure relates to a nontoxic poly(ethyl cyanoacrylate) (PECA) plastic. The PECA-based plastic is sourced from non-petroleum feedstocks and can be thermally and / or mechanically converted back to the ethyl cyanoacrylate monomer in a closed-loop recycling system with high monomer recovery. The disclosure also provides for methods of making the PECA plastics and methods of recycling the PECA plastics.

The invention discloses an eyelash grafting instant-drying adhesive and a preparation method thereof, and belongs to the field of daily chemicals, the eyelash grafting instant-drying adhesive is prepared from the following raw materials: ethyl alpha-cyanoacrylate, a polymethacrylate polymer, toughening rubber, a reinforcing agent and a stabilizing agent, the ethyl alpha-cyanoacrylate is added into a stirring kettle, stirring is started, and the mixture is stirred uniformly; the instant-dry adhesive is obtained by sequentially adding the toughening rubber, the reinforcing agent and the stabilizing agent, adding the polymethacrylate polymer, heating and stirring, has the advantages of being high in speed, low in irritation, soft, long in durability and the like in the aspect of planting false eyelashes, is high in bonding strength and high in attaching and positioning speed, and can meet the requirement of rapid operation of eyelash beautifiers.