36results about How to "Fast cross-linking and curing" patented technology

The invention relates to a polyfunctional castor oil-based photo-cured resin as well as a preparation method and application thereof. The preparation method comprises the following steps: with isocyanate and hydroxyl acrylate as raw materials, adding a polymerization inhibitor and a catalyst, introducing nitrogen for protection, and reacting for a certain period of time, so as to obtain an intermediate isocyanate semi-blocked prepolymer; adding castor oil into the prepared isocyanate semi-blocked prepolymer, so as to obtain castor oil-based urethane acrylate resin; and mixing the castor oil-based urethane acrylate resin with a photoinitiator and a diluent, and carrying out ultraviolet light radiation, so as to obtain UV castor oil-based resin with excellent performance. The photo-cured resin synthesized by virtue of the preparation method has relatively high molecular weight and viscosity, so that the interaction among resin molecules is enhanced, and the photo-crosslinking reaction efficiency of the resin is improved; the photo-cured resin contains more terminal double bonds, can be rapidly photo-cured and is suitable for being used as UV cured coatings, 3D printing materials and the like; and the prepared photo-cured resin has the beneficial effects that the water absorption rate and volume shrinkage rate of a cured film are substantially increased, meanwhile, the cost is low, the process is simple and controllable, and a product is relatively environment-friendly.

The present invention discloses one kind of heat resistant, fast cured, neutral acetone-eliminating room temperature vulcanized silicone rubber and its preparation process. The silicone rubber consists of alpha, omega-dihydroxy dimethyl siloxane 80-120 (in weight portions, the same below), hydroxyl radical terminated polydimethyl siloxane 10-20, silica 10-15, tackifier 0.5-1.5, heat resisting additive 5-15, organic guanidine catalyst 0.5-0.9, and acetone-eliminating siloxane cross-linking agent 5-8. The acetone-eliminating room temperature vulcanized silicone rubber has fast vulcanizing, easily completed cross-linking reaction, no need of using organic metal compound as catalyst, high heat resistance, high electrically insulating performance, high strength, high storing stability, wide adhering application range, and other advantages.

The invention provides a composite material prepreg for quickly ultraviolet light curing a resin base structure reinforced by glass fibers with certain thickness and a preparation method thereof. In the method, a common free radical curing resin as a matrix, a proper photoinitiator, a thermal initiator and other assistants are preferably selected to form a light-thermal composite initiation system, a glass fiber textile is used as a reinforcement material, and the composite material prepreg with a certain thickness is prepared by a proper compound process. The prepreg can be cured by irradiating ultraviolet light on a single surface for 10 minutes, and the light curing thickness at one time can be higher than 15 mm. By adopting the invention, the existing technical problem that the ultraviolet light cannot be used for curing composite material structural members with large thicknesses (10-15 mm and larger) at one time is solved, the composite material prepreg is cured more conveniently and efficiently. The light-cured resin and the composite material thereof express huge application prospect and market potential in some special fields, for example, trenchless repair of municipal drainage pipelines.

The invention relates to a preparation method of a pressure-sensitive adhesive, and particularly relates to a preparation method of a solvent-free ultraviolet-curable organosilicone-modified pressure-sensitive adhesive. The method comprises the steps of: preparation of an organosilicone-modified polyurethane acrylate prepolymer and preparation of the pressure-sensitive adhesive. The pressure-sensitive adhesive is free of any organic solvents, and can be coated at normal temperature, dried without heating and rapidly cross-linked and cured.

The invention belongs to the technical field of materials, and particularly relates to a degradable core-shell type oxidized calcium alginate gel microsphere, and a preparation method and applicationthereof. According to the preparation method disclosed by the invention, the degradable core-shell type oxidized calcium alginate gel microsphere is prepared on the basis of micro-fluidic control; andan inner oil-phase fluid, a water-phase fluid and an outer oil-phase fluid form oil/water/oil double emulsion droplets, an acidic oil phase fluid containing organic acid is introduced into the downstream position of the oil/water/oil double emulsion droplets, calcium hydrochloride nanoparticles in a water phase of the oil/water/oil double emulsion droplets are rapidly dissolved, and free calciumions are released, so oxidized alginate in a water phase and the calcium ions are initiated to undergo rapid cross-linking so as to form a gelatinous oxidized alginate layer, and the degradable core-shell type oxidized calcium alginate gel microsphere is obtained. The degradable core-shell type oxidized calcium alginate gel microsphere prepared by the preparation method has the advantages that a size structure is uniform and monodispersity is high.

The invention discloses a preparation method of silane modified water-based acrylic coating. The method mainly comprises the following steps: preparing water-based acrylic coating in advance, before construction, adjusting the pH value, compounding a modifier silane cross-linking agent with the water-based acrylic coating, uniformly stirring, and then carrying out construction. The modifier silane cross-linking agent firstly reacts with water in the water-based acrylic coating to hydrolyze to form a siloxy group; then silicon hydroxyl is condensed with each other to form a cross-linked network structure, so that the wear resistance, the water resistance and the mechanical property of the water-based acrylic coating are improved. Meanwhile, siloxane formed by hydrolysis has excellent interaction force with metal, inorganic, wood and polar macromolecules, so that the adhesive force of the coating on the base material can be remarkably improved. The modification technology is simple, convenient to construct and high in curing speed, and the performance of the coating is obviously improved, so that the modification technology has a relatively good application and development prospect.

The invention discloses a polycarbodiimide cross-linking agent, a preparation method and application thereof, and a composition containing the polycarbodiimide cross-linking agent. The polycarbodiimide cross-linking agent comprises a compound shown as a formula (1) and a water-soluble organic solvent, wherein in the compound shown as the formula (1), R1 is a divalent aliphatic hydrocarbon group with 1-18 carbon atoms or a divalent alicyclic hydrocarbon group with 3-13 carbon atoms, R2 is a divalent aliphatic hydrocarbon group with 1-10 carbon atoms, R3 is H, an alkyl group with 1-5 carbon atoms or an alkoxy group with 1-5 carbon atoms, and n is 1-10. The polycarbodiimide cross-linking agent provided by the invention has relatively high reaction activity at room temperature, can be quickly cross-linked and cured, and has a wide application prospect in the field of water-based coatings/adhesives.

The invention discloses a silk fibroin hemostatic material and a preparation method thereof. The preparation method comprises the following steps: adding photosensitizer riboflavin into a silk fibroinaqueous solution, and performing uniform mixing to obtain a mixed solution; continuously introducing oxygen into the mixed solution, and keeping oxygen tension in the mixed solution in a saturated state; pouring the oxygen-saturated mixed solution into a transparent die, and performing cooling; irradiating the mixed solution with ultraviolet light to obtain cross-linked silk fibroin hydrogel, andcontrolling the temperature of the mixed solution in the ultraviolet light irradiation process to be 0-8 DEG C; taking out the silk fibroin hydrogel from the die, and performing drying to obtain silkfibroin xerogel; and crushing the silk fibroin xerogel into powder to obtain the silk fibroin hemostatic material. Through cross-linking in a low-temperature environment, the preparation method can effectively reduce the reaction temperature, effectively limit the generation of a crystalline structure, and greatly improve the swelling capacity and the rapid blood suction performance of the material.

The invention relates to a foldable antibacterial transparent hardening layer, which is a film layer formed by curing UV type antibacterial hardening coating material through ultraviolet irradiation,wherein the UV type antibacterial hardening coating material is prepared from the following components in parts by mass: 15-35 parts of polyurethane acrylate prepolymer, 20-50 parts of an active diluent, 10-30 parts of a diluent, 1-5 parts of a photoinitiator, and 2-15 parts of modified silver-loaded silicon dioxide, wherein the reactive diluent is multifunctional acrylate, the diluent is propylene glycol monoacetate, the polyurethane molecular chain of the polyurethane acrylate prepolymer has flexibility and can provide bending performance of the antibacterial transparent hardening layer, andthe acrylic acid molecular chain segments and acrylate in the polyurethane acrylate prepolymer can be quickly cured under the action of UV. According to the invention, the antibacterial transparent hardening layer can slowly release silver ions to inhibit the growth and propagation of bacteria on a human-computer interaction interface, so that the antibacterial function of the flexible cover plate is realized.

The invention discloses a preparation method of laminated glass glue with high bonding strength, and belongs to the technical field of glass glue preparation. According to the preparation method provided by the invention, a self-made polyurethane acrylate prepolymer is used as a matrix, modified silica sol and self-made fruit wine are used as reinforcing substances, and the laminated glass glue isprepared with the supplement of a coupling agent and modified self-made reaction materials. Contained acrylates have double bounds with polymerization reaction activity, and free radicals can be polymerized under the action of illumination, so that crosslinking and solidification are carried out among polyurethane acrylate macromolecular chains, and the bonding strength is improved. According tothe preparation method, in the process of polymerization reaction, due to the steric hindrance effect of methyl in toluene diisocyanate molecules, the para-position reaction activity is usually largerthan the ortho-position reaction activity, and an effect of fast crosslinking and solidification is exerted. According to the preparation method, the silica sol is modified by a silane coupling agentand an alcohol solution, so that the bonding strength is strengthened by a network structure, the bonding property between the laminated glass glue and glass is enhanced, and thus the preparation method has a wide application prospect.

The invention provides a double-component anti-corrosion coating which comprises a component A and a component B. The component A comprises the following components in parts by mass: 30-70 parts of epoxy resin, 10-15 parts of metal oxide and 10-35 parts of organic solvent; and the component B comprises the following components in parts by mass: 30-70 parts of polyamide resin. The polyamide resin can be dissolved in various solvents and also has good miscibility with the epoxy resin, the polyamide resin contains organic silicon, so that the polyamide resin has high reaction activity, after the polyamide resin is mixed with the epoxy resin, a cross-linking curing reaction can be carried out as long as a low temperature is reached, and therefore, the two-component anti-corrosion coating provided by the invention has good quick-drying property. In addition, the polyamide resin contains long carbon chains and polar groups, and after the polyamide resin is mixed with the epoxy resin, the adhesive force and toughness of the epoxy resin coating can be remarkably improved.

The embodiment of the invention relates to the field of solar energy, and provides a photovoltaic module and a preparation method thereof. The first packaging adhesive film and the second packaging adhesive film are stacked, and a gap is formed between the first packaging adhesive film and the second packaging adhesive film; the photovoltaic module is provided with a central area and a peripheral area surrounding the central area, the battery string is located in the central area, the first packaging adhesive film of the peripheral area is provided with a first through hole, the second packaging adhesive film of the peripheral area is provided with a second through hole, the first through hole is opposite to the second through hole, and at least one of the first through hole and the second through hole is a through hole; the first through hole and the second through hole are filled with the filling structure, and in the laminating process, the cross-linking curing speed of a material forming the filling structure is higher than that of a material forming the first packaging adhesive film, and the cross-linking curing speed of the material forming the filling structure is also higher than that of a material forming the second packaging adhesive film. The embodiment of the invention is at least beneficial to improving the yield and stability of the photovoltaic module.

The invention belongs to the technical field of high polymer materials, and particularly relates to photocuring 3D printed vinyl star-shaped polyphosphate composite photosensitive resin as well as a preparation method and application thereof. The material comprises the following components in percentage by weight: 40%-70% of a vinyl star-shaped polyphosphate high polymer material, 5%-60% of a cross-linking agent, 5%-25% of a photoinitiator, 5%-40% of a diluent, 0%-25% of a solvent and 0%-30% of a filler. The photosensitive resin provided by the invention can be processed by adopting photocuring three-dimensional forming additive manufacturing and other technologies while maintaining good biocompatibility and degradability, is good in processability, has important economic value and is widein application range.

The invention relates to the technical field of optical cement, in particular to environment-friendly OCA (Optical Clear Adhesive) and a preparation method thereof. The environment-friendly OCA optical adhesive comprises the following raw materials in parts by weight: 40-60 parts of an acrylate prepolymer; 0.5 to 2 parts of a photoinitiator; 30 to 60 parts of a reactive diluent; 1 to 3 parts of diglycolamine; 6-10 parts of a waterproof agent; the waterproof agent comprises fluorosilane and a mercapto compound which are mixed according to the mass ratio of (2-4): (6-9). The preparation method of the environment-friendly OCA optical adhesive comprises the following steps: mixing and stirring the acrylate prepolymer, the photoinitiator, the reactive diluent and the waterproof agent according to the formula, and irradiating for 20-40 minutes by ultraviolet light to obtain the environment-friendly OCA optical adhesive. The environment-friendly OCA optical cement disclosed by the invention has the advantage that the bonding strength is not easy to reduce after long-term use; in addition, the preparation method has the advantage of being green and environmentally friendly.