36results about How to "Improve double bond conversion rate" patented technology

The invention discloses a high-weather-resistant UV (ultraviolet) coating for a decorative plate and a preparation method of the high-weather-resistant UV coating. The coating is characterized by comprising, in parts by mass, 30-60 parts of an oligomer, 5-10 parts of thermoplastic acrylic resin, 15-50 parts of acrylate monomers, 3-6 parts of a photoinitiator, 0-30 parts of pigment, 0-10 parts of filler and 3-20 parts of an auxiliary agent. The invention further comprises the preparation method. The coating has the advantages that the decorative effect is good, the hardness of the coating is higher than 2H, the wear resistance is good, a coating film does not change in the extreme environment with the temperature ranging from subzero 40 DEG C to 60 DEG C and passes a 2000-hour salt fog resistance test, Q-Sun detection shows that the weather resistance of the coating can maintain 4,000 h, the production efficiency is high, few VOCs (volatile organic compounds) are discharged, little pollution is caused, the cost is low and the like.

The invention discloses a preparation method of antibacterial glass. The preparation method comprises the following steps: cutting a glass raw material, then carving and processing the glass raw material, and cleaning and pretreating the glass raw material to obtain pre-treated glass; and mixing, heating and melting potassium nitrate and silver nitrate to obtain antibacterial tempering furnace water, and adding the pre-treated glass into the antibacterial tempering furnace water for antibacterial tempering to obtain the antibacterial glass. The preparation method of antibacterial glass is simple in process, and the obtained antibacterial glass has the characteristics of the glass material and is good in antibacterial effect and wide in application.

The invention discloses UV fast curing optical fiber coloring ink which is prepared from the following components in percentage by weight: 25 to 35 percent of color paste, 20 to 40 percent of acrylateresin, 10 to 30 percent of an acrylate reactive diluent, 12 to 20 percent of a photoinitiator, 4 to 10 percent of a leveling agent and 1 to 10 percent of a defoamer. The UV fast curing optical fibercoloring ink prepared by the invention is high in coloring strength, uniform in particle size distribution, not easy to settle, high in surface smoothness and relatively good in stripping property, has the most important characteristics of extremely fast curing and extremely high double bond conversion rate, and can be suitable for relatively high coloring speed.

The invention belongs to the field of 3D printing, and particularly relates to a washable high-temperature-resistant conductive photocuring material for 3D printing and a printing process thereof. The washable high-temperature-resistant conductive photocuring material comprises the following components in parts by mass: 10 to 30 parts of waterborne epoxy acrylate, 10 to 30 parts of waterborne polyester acrylate, 10 to 30 parts of acrylate monomer, 10 to 30 parts of high-strength acrylate oligomer, 1 to 10 parts of a photoinitiator, 1 to 10 parts of a metal filler and 1 to 10 parts of gas-phase nanometer silicon dioxide, wherein the completely cured strength of the high-strength acrylate oligomer is not lower than 90 MPa. The invention also provides a printing process of the material. The characteristics of high conductivity, high migration resistance and stable conductivity of silver-plated copper powder are matched with light curing treatment, so a continuous conductive network is formed.

The invention belongs to the field of dentistry, and particularly relates to a dlp type 3d printing photocuring material for a clinical dental temporary crown, which takes nano organic-inorganic hybrid UV resin, high-strength aliphatic urethane acrylate, high-toughness aliphatic urethane acrylate and a free radical acrylate monomer diluent as main bodies and is matched with an inorganic silver antibacterial agent and a pigment, the dLp type 3D printing photocuring material for the clinical dental temporary crown is prepared from a 385nm wavelength free radical system composed of a photoinitiator, and the problems of poor material performance stability, poor size stability, poor toughness, poor mechanical property, medical risk and the like are effectively solved by using a special printingprocess and a post-treatment process.

The invention relates to a preparation method for a highly-weatherable ultraviolet-curable polyurethane coating. The preparation method comprises the following steps: allowing active epoxy groups located at two ends of epoxy-terminated polydimethylsiloxane to react with acrylic acid, introducing a carbon-carbon unsaturated double bond, and carrying out a reaction with isocyanate so as to prepare the highly-weatherable ultraviolet-curable polyurethane coating. The highly-weatherable ultraviolet-curable polyurethane coating provided by the invention has excellent properties like good wear resistance, chemical product resistance and oil resistance, strong adhesion force and low-temperature curability of a polyurethane coating; meanwhile, the coating has the characteristics of weather resistance and high-temperature resistance of an organosilicon material due to addition of an organosilicon chain into a molecular structure. The coating obtained by using the preparation method provided by the invention has good ultraviolet-curing activity, high double-bond conversion rate and good component compatibility. The preparation method provided by the invention has the following advantages: preparation steps are simple; used raw materials are frequently-used products in a coating industry; reaction conditions are mild; and a product has low comprehensive cost and is applicable to large-scale popularization and mass production.

The invention discloses a 3D printing photocuring material and an underwater curing after-treatment processing technology thereof. The photocuring material is mainly prepared from, by weight, 20-50% of UV-curing nanometer organic-inorganic silicon hybridized resin, 5-25% of UV-curing self-repairing resin, 0.5-20% of fluorine-modified resin, 10-40% of a monomer diluent, 0.1-5% of a photoinitiator,0.1-1% of a pigment, 0.1-5% of a filler and 0.1-3% of an auxiliary agent. The 3D printing photocuring material is firstly subjected to curing forming by 3D printing DLP equipment with the UVA wavebandof 385 nm, and then subjected to the underwater curing after-treatment processing technology. The 3D printing photocuring material obtained by means of the technology has the tensile strength of 68-80 Mpa and the bending strength of 53-61 Mpa, the scratch resistance is excellent, tiny scratches can be quickly repaired, no mark is left, the surface smoothness level is nabla 10-nabla 11, the size change is within the range of 0-0.10 mm after long-time placement, and the light aging resistance reaches 300 h.

The present invention discloses a methacrylate macromonomer containing a fluorine structure but not containing a bisphenol A structure, preparation method therefor and application thereof. The prepared methacrylate macromonomer containing fluorine structure not containing bisphenol A structure can be used as an organic monomer component of a dental restorative material. The macromonomer has the advantages of large molecular weight, large molecular volume, not containing a bisphenol A structure and containing a fluorine structure. Therefore, when the macromonomer is polymerized, the polymerization volume shrinkage is small and a polymerization product has a good mechanical property.

The present invention discloses a methacrylate macromonomer containing a fluorine structure but not containing a bisphenol A structure, preparation method therefor and application thereof. The prepared methacrylate macromonomer containing fluorine structure not containing bisphenol A structure can be used as an organic monomer component of a dental restorative material. The macromonomer has the advantages of large molecular weight, large molecular volume, not containing a bisphenol A structure and containing a fluorine structure. Therefore, when the macromonomer is polymerized, the polymerization volume shrinkage is small and a polymerization product has a good mechanical property.

The invention discloses an ultraviolet curing coating containing a modified carbon nanotube. Raw materials comprise epoxy acrylate prepolymers, reactive diluents, polyimide, modified carbon nanotube montmorillonite, attapulgite, titanium dioxide sol, sulfydryl silane coupling agents, 3, 9-dihydroxytoluene-3', 9'-diethyl-1, 5, 7, 11-tetra-oxygen spiro-heterocycle [5, 5] undecane and auxiliaries. The modified carbon nanotube is prepared according to the process including the steps: adding photo-initiators D2959 and succinic anhydride into methylene dichloride, stirring the materials, adding 4-methylaminopyridine, performing reaction for 8-15 hours at the temperature of 60-65 DEG C, and performing washing, drying and rotary evaporation to obtain a material A; epoxidizing a carbon nanotube toobtain an epoxidized carbon nanotube; blending the epoxidized carbon nanotube, the material A and xylene, stirring the materials, adding triphenyl phosphine, performing reaction for 6-8 hours at the temperature of 85-95 DEG C, and performing rotary evaporation and drying.

The invention discloses single-component long-wavelength photoinitiators, and relates to the field of photocurable materials. Photoinitiators are synthesized by a Claisen-Schmidt reaction, alpha-H-free aldehyde participating in the reaction comprises a carbazole derivative, and the carbazolyl group enhances the conjugation of the molecular structure of the photoinitiators to lengthen the maximum absorption wavelength of the synthesized products. The initiators have a good solubility in most photopolymerizable monomers, have an ultraviolet absorption peak matched with a corresponding LED lightsource, and can initiate polymerization of various monomers and achieve a good curing effect under the illumination of the LED light source. The invention also discloses a preparation method of the single-component long-wavelength photoinitiators. The preparation method has the advantages of simple conditions and mild conditions.

The invention provides a photochromic composition of hyper-branched polyurethane vinyl ether, a product and a preparation method. The composition comprises polyol, diisocyanate, a solvent, a catalyst, trihydric alcohol, tetrahydric alcohol, a polymerization inhibitor, 4-hydroxybutyl vinyl ether, a leveling agent, an anti-foaming agent, an ultraviolet absorber, an antioxidant, mercaptan and a photochromic dye. A substrate material is coated with the composition, and an optical product is prepared through EB curing. The preparation method comprises the following steps: firstly, pre-polymerizing diisocyanate and polyhydric alcohol into an oligomer, then polymerizing trihydric alcohol and tetrahydric alcohol into a polyurethane prepolymer with a hyper-branched structure in sequence, and then blocking by adopting 4-hydroxybutyl vinyl ether to obtain hyper-branched polyurethane containing vinyl ether; and finally, mixing with mercaptan and photochromic fuel to obtain the radiation curable composition. The composition has relatively high refractive index, oxygen inhibition resistance and excellent adhesive force performance.

The invention provides a polymerizable monomer composition for dental restoration as well as a preparation method and application of the polymerizable monomer composition. The polymerizable monomer composition comprises a combination of a polymerizable monomer, an initiator and a cross-linking agent. By adding the cross-linking agent, the double-bond conversion rate of the polymerizable monomer is improved, and the residual rate of the polymerizable monomer is reduced; as the polymerizable monomer is added into a resin ceramic repair material, the prepared resin ceramic repair material can have high strength and toughness, so when the resin ceramic repair material is applied to tooth repair, the resin ceramic repair material can keep a good form during processing or during wearing and using by a patient; and the water absorption value and the dissolution value of the resin ceramic repair material are reduced, and the mechanical strength is improved, so the service life of the resin ceramic repair material is prolonged, and market requirements are met.

The invention relates to an ultraviolet-curing black adhesive and a preparation method of same. The UV-curing black adhesive is mainly prepared from the following raw materials: modified polyurethane acrylate, an active monomer, matt powder, carbon black, a photoinitiator and a thermo-initiator. The active monomer includes at least two selected from isobornyl acrylate, tetrahydrofuran acrylate, cyclic trimethylolpropane methylal acrylate, tricyclodecane dimethanol diacrylate, tri(2-hydroethyl)isocyanurate triacrylate. The modified polyurethane acrylate is mainly prepared from a mixture of polyether glycol and mercaptan, diisocyanate, hydroxyl-functionalized acrylate, a catalyst and a polymerization inhibitor. The diisocyanate is a composition composed of isophorone diisocyanate and toluene diisocyanate. The UV-curing black adhesive can satisfy the adhesion force demand of curing a thick coating, and is free of any undesirable phenomenon, such as oil dirt, for more than 300 h in a double-85 test.

The invention discloses a (meth)acrylic acid ester monomer without bisphenol A structure and low polymerization volume shrinkage, its preparation method and application. The (meth)acrylate macromonomer without bisphenol A structure prepared by the invention can be used as an organic monomer component of dental restorative materials. The macromonomer has the characteristics of large molecular weight, large molecular volume, and no bisphenol A structure. Therefore, the macromonomer has a small polymerization volume shrinkage during polymerization, and can reduce the presence of dental materials with a bisphenol A structure on the human body. potential hazards.

The invention discloses a PVC floor composite coating, the composite coating is located on the surface of a substrate, and the composite coating sequentially includes a first primer layer, a second primer layer, a third primer layer and a topcoat layer from bottom to top . The preparation method of the present invention comprises the following steps: firstly treating the substrate, then coating the first primer layer on the substrate, and curing; then coating the second primer layer on the surface of the first primer layer, and curing; The surface of the second primer layer is coated with the third primer layer and cured; finally, the top coat is applied and cured, that is, a composite coating is formed on the substrate. The present invention combines the formula design of the PVC floor composite coating with the curing method of the high-intensity LED light source, making it possible to apply multi-coat coating to the PVC floor. The cured coating has low shrinkage, excellent toughness, high hardness, and Wear and scratch resistance, which can solve the industry common problem that PVC floor is easy to scratch.

The invention relates to a photochromic composition of hyperbranched urethane acrylate, a preparation method and application thereof. The photochromic composition comprises: polyvalent mercaptan; unsaturated polyol; acrylate isocyanate; initiator; polymerization inhibitor Agents; Photochromic Dyes; Antioxidants; UV Absorbers; Light Stabilizers; Leveling Agents; Defoamers. The method adopts the reaction of polyvalent mercaptan and unsaturated polyol to generate hyperbranched polyol, photoinitiator initiates polymerization, and then capping with acrylate isocyanate to obtain multifunctional hyperbranched urethane acrylate containing thioether structure, and finally adding other The auxiliary agent and the photochromic dye are the photochromic composition. The photochromic film prepared from the composition by electron beam radiation curing not only has good photochromic effect, but also has high fastness and hardness, outstanding toughness and excellent wear resistance, chemical resistance and chemical resistance. Aging resistance.

The invention provides a photochromic composition product suitable for EB curing and a preparation method thereof, the photochromic composition product comprises polyol, acrylate diol, diisocyanate, a catalyst, a polymerization inhibitor, a diluent, photochromic powder, an antioxidant, an ultraviolet absorber, a leveling agent and a defoaming agent, a photochromic composition is obtained, a substrate material is coated with the photochromic composition, and through infrared lamp radiation, under the protection of nitrogen, EB radiation curing is carried out to form a film. According to the invention, carbon-carbon double bonds of acrylate are introduced into a polyurethane system, a plurality of flexible structures and a plurality of rigid structures are simultaneously grafted on a molecular chain segment by a prepolymerization method, and finally, the photochromic composition is well attached to the surface of a transparent substrate through EB radiation curing. The damage of ultraviolet light to the photochromic powder is avoided, and the coating curing time is shortened, so that the qualified rate of finished products is increased, and the production cost is reduced.

The invention belongs to the field of ultraviolet-curable coatings, and discloses an ultraviolet-curable coating with oxygen inhibition resistance, and a preparation method thereof. The ultraviolet-curable coating with oxygen inhibition resistance is prepared from, by weight, 70-80 parts of acrylic resin, 20-30 parts of an active diluent, 1-3 parts of a photoinitiator and 2-15 parts of mercapto-terminated hyperbranched polyester. The coating has the advantages of high-efficiency energy saving and environmental protection, obtaining of a coating layer through one-time ultraviolet curing, double bond conversion rate reaching 80-95%, and substantial oxygen inhibition resistance.

The invention provides a photochromic composition, product and preparation method of hyperbranched polyurethane vinyl ether. The composition includes polyol, diisocyanate, solvent, catalyst, trihydric alcohol, tetrahydric alcohol, polymerization inhibitor, 4 ‑Hydroxybutyl vinyl ether, leveling agent, defoamer, ultraviolet light absorber, antioxidant, mercaptan and photochromic dye, the composition is coated on the base material, and cured by EB to make optical products. In the present invention, diisocyanate and polyol are pre-polymerized into oligomers, then trihydric alcohols and tetrahydric alcohols are used to polymerize into polyurethane prepolymers with hyperbranched structure, and then 4-hydroxybutyl vinyl ether is used to end-block. The hyperbranched polyurethane containing vinyl ether is obtained, and finally mixed with mercaptan and photochromic fuel to form a radiation-curable composition. The composition has high refractive index, anti-oxidation inhibition and excellent adhesion performance.

The invention provides a production process of a color-changing lens, which belongs to the field of optical films. The photochromic lens includes a lens substrate, a first layer of photochromic composition coating and a second layer of protective layer composition coating. First, the photochromic composition is sprayed on the lens substrate, irradiated by infrared lamps, and then passed through EB. Radiation curing forms a thin film, that is, the first layer of photochromic composition coating; then sprays the protective layer composition on the lens containing the first layer of photochromic composition coating, irradiates with infrared lamps, and then undergoes UV curing to form The thin film, ie the second coating of the protective layer composition, ultimately results in a photochromic lens comprising the first coating of the photochromic composition and the second coating of the protective layer composition. The combination of EB electron beam and UV technology shortens the curing time of the color-changing layer and the protective layer to a few seconds, and the cured protective layer can achieve anti-fog performance. The color-changing lenses prepared by this technology have good light transmittance and firmness. degree and depth of discoloration.

The invention discloses a 3D printing light-curing material and its underwater curing post-treatment process. The main components of the light-curing material are calculated by weight percentage, consisting of 20-50% of UV-curable nano-organic-inorganic silicon hybrid resin, 5-25% of UV-curable self-repairing resin, 0.5-20% of fluorine-modified resin, and 10% of monomer diluent ~40%, photoinitiator 0.1~5%, pigment 0.1~1%, filler 0.1‑5%, auxiliary agent 0.1~3%. The 3D printing light-curing material of the present invention is first cured and formed by a 3D printing DLP device with ultraviolet light UVA 385nm band, and then undergoes an underwater curing post-treatment process. The tensile strength of the 3D printing light-cured material obtained by the process of the present invention is 68-80Mpa, the bending strength is 53-61Mpa, the scratch resistance is good, the fine scratches can be quickly repaired without leaving traces, and the surface finish level is ▽10- ▽11, the dimensional change is within 0.10mm under long-term storage, and the light aging resistance is up to 300h.

The invention provides a preparation method of a dental composite resin material and a product thereof, the method comprising: (1), weighing raw materials, the raw materials comprising: resin monomers, fillers, photocuring initiators, thermal curing initiator; (2), mixing the weighed raw materials to obtain a composite resin precursor; (3), subjecting the composite resin precursor to thermal curing treatment to obtain a pre-cured composite resin material, wherein the thermal curing temperature 100-200°C, the thermal curing time is 0.5-3h, and the thermal curing pressure is 1-250MPa; (4), the composite resin precursor after the thermal curing treatment is subjected to photocuring treatment to obtain a dental composite resin material, Among them, the light intensity of light curing is 800‑2000mW / cm 2 , the light curing time is 20-300s. The application of the invention can improve the double bond conversion rate of the composite resin material.

The invention discloses a long wavelength photoinitiator containing carbazole derivatives, and relates to the field of photo-cured materials. The photoinitiator is synthesized by Claisen-Schmidt reactions. Aldehyde that participates in the reactions contains carbazole derivatives and does not contain alpha-H. Due to the carbazole groups, the conjugate action of the molecular structure is enhanced,and thus the maximum absorption wavelength of the synthesis product is prolonged. The provided initiator can be well dissolved in most photo-polymerized monomers; the UV absorption peaks can be matched with corresponding LED lamps; under the irradiation of LED lamps, polymerization of multiple monomers is triggered, and the curing effect is good. The invention also discloses a preparation methodof the long wavelength photoinitiator. The preparation method is simple, and the preparation conditions are mild.

The invention belongs to the technical field of bio-based UV curing materials, in particular to a sulfhydryl castor oil-based deep photocuring material and a preparation method and application thereof. The raw material components of the sulfhydryl castor oil-based deep photocuring material comprise castor oil, sulfhydryl castor oil and a photoinitiator. The preparation method has simple steps: thecastor oil, the sulfhydryl castor oil and the photoinitiator are uniformly mixed under the condition of completely avoiding light, and an obtained prepolymer solution can be stored away from light. According to the invention, sulfhydryl is introduced into a biomass UV curing material system to construct a sulfhydryl-alkene photopolymerization material system which replaces a traditional acrylic ester pure alkene photopolymerization material system; double bonds of the prepared UV curing material are all from the castor oil, completely no acrylate double bond is contained, and meanwhile, due to the unique step-by-step polymerization mechanism, the sulfhydryl-alkene photopolymerization system effectively delays gel points, overcomes the phenomenon of oxygen polymerization inhibition, reduces volume shrinkage, improves double bond conversion rate, and simultaneously makes the polymerization network more uniform.

The invention discloses a method for preparing a polymer by utilizing an allyl monomer through [3 + 2] cyclization reaction, the polymer prepared by the method and application of the polymer. The allyl monomer and a photoinitiator are utilized to participate in the reaction in a free radical or excited state through the [3 + 2] cyclization reaction, and a five-membered ring free radical product is formed through the cyclization reaction, and a polymerization reaction is triggered to obtain a polymer; the reaction is carried out at normal temperature, the reaction conditions are mild, the double bond conversion rate is high, the double bond conversion rate of the diallyl monomer can reach 45% or above in 500 seconds, the high-molecular-weight polymer with the molecular weight of ten thousands can be obtained, and the obtained polymer is proved to be all five-membered rings containing carbon atoms, and has the advantages of high molecular weight, high molecular weight, high molecular weight and the like; the molecular chain of the polymer also contains an annular structure, and the ring does not contain heteroatoms, so the prepared polymer has the characteristics of no toxicity, easiness in obtaining and good biological property, and can be applied to transcatheter arterial embolism.

The invention belongs to the technical field of protective films, and particularly relates to a solar backboard protective film and a preparation process thereof.The solar backboard protective film comprises a base layer, the surface of the base layer is coated with a composition protective layer, and the base layer comprises one of PET or PUE; wherein the composition protective layer is composed of the following material components: 10-30 parts of polyurethane acrylate; 10 to 30 parts of epoxy acrylate; 10 to 30 parts of polyester acrylate; 10 to 30 parts of polyacrylate; an antioxidant: 0.01 to 0.5 part of BASF; 0.01 to 0.1 part of an ultraviolet light absorber; 0.01 to 0.1 part of a light stabilizer; 0.01 to 0.1 part of a leveling agent; and 0.01 to 0.1 part of a defoaming agent; and poor weather resistance caused by residual double bonds can be avoided, the double bond conversion rate of electron beams is higher from performance comparison, and better hardness, wear resistance and chemical resistance are achieved.

The invention provides a high-efficiency polymerizable photoinitiator suitable for color photoresist and a preparation method of the photoinitiator, the initiator takes hydrogen abstraction type photoinitiator benzophenone as a core, an acrylate group is introduced into one benzene ring, and a hydrogen donor group is introduced into the other benzene ring. On one hand, the acrylate group can improve the solubility of the photoinitiator and improve the compatibility with resin, monomers and the like, and on the other hand, the photoinitiator participates in polymerization in the photocuring process, so that the crosslinking density of the colored glue is improved, the hardness is improved, and micromolecular photoinitiator migration caused by post-baking high temperature or extreme conditions is reduced; the hydrogen-donating group can significantly improve the initiation efficiency of the photoinitiator and the polymerization speed of the system.

The invention discloses an ultraviolet-infrared double curing varnish coating and a preparation method thereof. The varnish coating is prepared from UR-1 double curing varnish, a curing agent and a diluent in a mass ratio of (3-8):1:1. The curing process comprises an infrared preheating stage, an ultraviolet curing stage and an infrared curing stage, wherein at the first infrared preheating flash drying stage, a far infrared heating system with wavelength of 2.4 to 2.7mu m is adopted, and heating is performed at the temperature of between 70 and 80 DEG C for 2 to 3 minutes; at the second ultraviolet curing stage, ultraviolet rays with illuminance of 800 to 1,200mj / cm<2> irradiate the surface of the coating for 3 to 10 minutes; and at the third infrared curing stage, the far infrared heating system with the wavelength of 2.4 to 2.7mu m is adopted, and heating is performed at the temperature of between 120 and 130 DEG C for 5 to 10 minutes, so that the coating is cured to form a film. The problems that the surface of an irregular substrate is locally illuminated insufficiently and the coating has insufficient yellowing resistance and weather resistance are solved.