47results about How to "Improve curing depth" patented technology

Composition with at least one polymerizable binder and one polymerization initiator, which contains at least one acylgermanium compound according to general Formula (I),

and the use of acylgermanes of Formula (I) as initiators for radical polymerization or for the preparation of dental restorations.

The invention discloses an organic silicon rubber waterproof adhesive and a preparation method thereof. The preparation method comprises the steps of: firstly, respectively feeding 20-40 parts by weight of hydroxyl-terminated polysiloxane, 4-7 parts by weight of a reinforcing agent, 41-60 parts of inorganic filler and 2-5 parts of inorganic adsorbent into a stirrer, mixing, and continuously discharging the mixed adhesive material; continuously feeding the mixed adhesive material into a material tank under a reduced pressure state by a pump and continuously degassing in the material tank; continuously feeding the degassed adhesive material into a static mixer, and meanwhile continuously feeding a mixture of 1-3 parts of a crosslinking agent and 0.2-0.8 part of a catalyst into the static mixer by a horizontal closed type continuous kneader; continuously feeding the statically-mixed adhesive material into a double-screw mixing extruder and meanwhile, continuously refilling 0.2-0.8 part of a silane coupling agent and 0.5-3 parts of a curing catalyst through a dropwise filling hole with pressure in the double-screw mixing extruder; mixing the adhesive material in the double-screw mixing extruder, continuously feeding the adhesive material into the mixer for degasing, and finally packaging.

The invention discloses silicon carbide ceramic paste for photocuring and a preparation method thereof. The paste is prepared by mixing SiC mixed powder, a dispersing agent, a monomer, a compatilizerand a photoinitiator, wherein the surface of the SiC mixed powder is coated with a SiO2 layer, so that the refractive index difference between the final paste and light-cured resin is reduced, and then printing efficiency is further improved. SiO2 can improve the solid phase content of the whole slurry, so that the sintering density of sintered ceramic and the mechanical property of finally formedceramic can be improved during subsequent ceramic sintering. Through addition of the dispersing agent into the slurry, the agglomeration phenomenon of the slurry can be reduced, the dispersity is improved, and the solid phase content of the whole slurry can be increased. Verification finds that the solid phase content in the paste can finally reach 40%-60%.

The invention discloses an electron beam radiation curing coating for metal heavy anti-corrosion. The coating is prepared from, by mass, 50%-80% of oligomer, 0.1-0.5% of reactive diluent, 1-10% of functional filler, 5-20% of antirust dyestuff and 5-15% of auxiliary filler, and the total mass percentage of the components is 100%. The curing coating for metal heavy anti-corrosion is cured by electron beam radiation, has the advantages of high efficiency and energy conservation, environment friendship and convenient operation, cured depth of the coating is high, thickness is big, and the adhesive force between the coating and the substrate is strong. A conductive carbon material is doped in the curable coating, thus the problem of metal heavy anti-corrosion is solved while electron beam energy absorption is avoided, and it is guaranteed that cured efficiency is not affected. The electron beam radiation curing coating for metal heavy anti-corrosion has excellent wear-resistance and corrosion-resistance, can be applied to the field of metal heavy anti-corrosion anti-corrosion, and is particularly applicable to the field of maritime work heavy anti-corrosion.

The invention relates to an ultraviolet-curing adhesive and a preparation method of same. The ultraviolet-curing adhesive is composed of, by weight, 20-60 parts of a self-made bifunctional polyurethane-acrylate prepolymer, 5-15 parts of a multifunctional polyurethane-acrylate prepolymer, 5-15 parts of a polyester-acrylate prepolymer, 5-20 parts of a reactive amine compounding agent, 10-30 parts of an acrylate-type activity diluent, 0.5-5% of a flatting and wetting agent, 1-5% of a photoinitiator, 0.5-5 parts of titanium dioxide nano-powder, and 0.1-10 parts of fumed silica. The ultraviolet light curing adhesive is suitable for temporary protection for metal shells, has protective effect during a later-period treatment process of CNC and can be easily stripped-off after the CNC machining. The adhesive has no residue and stripping off on the metal shells.

The invention discloses free radial, cation and air drying tertiary curing intaglio ink. The ink comprises components in percentage by weight as follows: 10%-40% of free radical, cation and air drying tertiary curing resin, 5%-20% of radical UV (ultraviolet) curing resin, 5%-20% of a reactive diluent, 25%-45% of pigment and filler, 3%-10% of a photoinitiator, 0.1%-2% of a drying agent and 5%-15% of an auxiliary agent. The intaglio ink is prepared with the tertiary curing resin as main resin, so that the advantages of the three curing modes of UV-light free radicals, UV-light cations and air drying can be fully performed, and defects of an UV-light photocuring system and air drying are avoided. The intaglio ink solves technical problems that thick ink film drying of existing free radical UV curing gravure ink is incomplete and traditional air drying type gravure ink is prone to set-off, so that the purposes of shortening of a reprinting cycle, set-off avoidance, no solvent evaporation and the like are achieved, and the intaglio ink has the advantages of economy, energy conservation, environmental protection and the like.

The invention relates to an ultraviolet curing adhesive for temporary protection and a preparation method of the ultraviolet curing adhesive. The ultraviolet curing adhesive is prepared from the following raw materials by weight: 20-60 parts of a self-made bifunctional polyurethane acrylate prepolymer, 5-15 parts of a multi-functional polyurethane acrylate prepolymer, 5-15 parts of a polyester acrylate prepolymer, 5-20 parts of a reactive amine compounding agent, 10-30 parts of acrylate type active diluents, 0.5%-5% of a leveling wetting agent, 1%-5% of a photoinitiator, 0.5-5 parts of titanium dioxide nanowires and 0.1-10 parts of fumed silica. The ultraviolet curing adhesive is suitable for temporary protection of a metal casing and plays a protective role in post-processing of CNC, and can be easily peeled off after CNC processing. Residues on the metal casing and falling off of the adhesive are avoided.

The present application discloses a dual-cured ceramic material for additive manufacturing and a preparation method and application of the dual-cured ceramic material. The preparation method comprisesthe steps that an oligomer and a reactive monomer are stirred and mixed to obtain a solvent; a dispersant is added into the solvent to uniformly disperse liquid; a photoinitiator, a thermal initiatorand a thermal curing accelerator are added, and after each reagent is added, the solution is fully stirred until uniform mixed; a defoamer, a polymerization inhibitor, a leveling agent and a sintering aid are added to obtain a resin-based solution, and after each reagent is added, the solution is fully stirred until uniform mixed; ceramic powder is dispersed in the resin-based solution, and ball-milling is carried out on the prepared material after the dispersion is completed; and after the material is ball-milled to be uniform, the obtained material is evacuated and stirred to eliminate airbubbles. The dual-cured ceramic material is prepared by the preparation method. The dual-cured ceramic material can be applied to additive manufacturing. The solidification depth of materials can be increased.

The invention provides a 3D printing light-cured ceramic particle and a preparation method thereof. The 3D printing photocuring ceramic particle comprises a ceramic matrix; wherein the surface of theceramic matrix is coated with a coating layer; and the coating layer is a sintering aid layer, and the sintering aid layer coats the ceramic matrix according to the decreasing order of the refractiveindexes of the sintering aid components. The 3D printing light-cured ceramic particle is prepared by a precipitation method, the thickness and components of the coating layer can be accurately controlled, and meanwhile, a proper coloring agent is added to adjust the light absorption coefficient, so that the 3D printing light-cured ceramic particle is more suitable for the requirements of a ceramiclight-cured molding technology.

The invention relates to the field of high molecular materials and discloses a reactive hot melt adhesive composition. The reactive hot melt adhesive composition comprises the following components inpercentage by weight: 55-80 percent of a bi-functional and/or poly-functional isocyanate terminated pre-polymer, 2-20 percent of tackifying resin, 5-30 percent of silane-modified silicone resin, 0.01-1 percent of a cross-linking agent and 1-10 percent of fumed silica as well as an optional additive. The invention further discloses a preparation method and application of the reactive hot melt adhesive composition. The reactive hot melt adhesive composition has relatively high curing speed and is especially suitable for the lighting industry.

The invention relates to a preparation method of an extensible solidifiable UV-LED cation solidifying adhesive. The extensible solidifiable UV-LED cation solidifying adhesive is prepared from, by weight, 30 to 55 parts of liquid epoxy resin, 0.01 to 0.5 part of MoS2 nanometer hollow ball, 5 to 20 parts of an active diluents, 10 to 30 parts of a filling material, 1 to 5 parts of a cation photoinitiator, 0.1 to 2.5 parts of a photosensitizer, 0.05 to 0.5 part of a pigment, 1 to 5 parts of a thixotropic agent, and 1 to 5 parts of an auxiliary agent. According to the preparation method, MoS2 nanometer hollow ball is added into colloid, is used for replacing a part of the pigment, can be taken as a scatterer, is capable of solving problems in the prior art that the solidification depth of conventional colored UV-LED cation solidifying adhesive is low, and solidification of bottom adhesive layers is difficult to realize; and the application range is wide.

The invention discloses a gradual intensity electron beam radiation coating solidification process. The invention bases on the solidification technics of electron beam radiation, adopts a solidifying form of gradual intensity, and mainly is used for solidifying coating with thickness at 100Mum-500Mum, the electron beam intensity is accurately controlled by a computer program, and achieves a dynamic coordination with the solidified thickness of the coating. On one hand, the process bases on the solidification of electron beam radiation, solves the problems of high energy consumption and inadequate depth by solidifications of traditional ultraviolet ray, one the other hand, the process adopts a solidifying form of gradual intensity, respectively solidifies the surface and the insides of the coating, further solves the problem of unenven solidifications of an inside and outside layer membrance when intermittently solidifying ultraviolet-electron beam, thereby increases the direct adherence force of the coating and a base material, enables the coating to possess superior abrasion tolerance and anti erosion property, meanwhile the process reduces unnecessary energy consumption when solidifying the electron beam at a single intensity. The obtained coating from the provided solidification process can be applied to the field of metal corrosion repreventions, meanwhile can achieve the coating and dressing of rusty surfaces.

The invention discloses a nanometer titanium dioxide ceramic paste material for photocuring and a preparation method thereof. The nanometer titanium dioxide ceramic paste material comprises TiO2 powder, gamma-glycidyl ether oxypropyl trimethoxy silane, sodium hexametaphosphate, a Tego 685 wetting dispersant, a monomer, a compatilizer and a photoinitiator. According to the invention, the monomer with a specified content is added to serve as a dilution paste material, so viscosity effect is reduced, the paste material is prevented from being too thin, the hardness of a photocuring product is improved, and the shrinkage rate of the product is reduced; and high-functional-group resin in the monomer can increase curing depth and improve curing efficiency, and the photoinitiator is cooperativelyused with the monomer, so the action effect of the surface of paste and ultraviolet light is relatively violent, a surface layer of the paste can be initiated to undergo quick curing and to penetrateinto the paste, the stability of the reaction of the surface of the paste and the ultraviolet light is improved, the curing efficiency is further improved, and photocuring molding is facilitated.

The invention belongs to the related technical field of ceramic materials. The invention discloses a ceramic material for photocuring forming as well as an emulsion coating preparation method and application of the ceramic material. The method comprises the following steps: (1) mixing a photosensitive resin, an emulsifier and deionized water to form a completely dispersed coating precursor emulsion, adding ceramic powder into the coating precursor emulsion, and uniformly dispersing the ceramic powder into the coating precursor emulsion; and (2) adding a photoinitiator into a mixture obtained in the step (1), irradiating with ultraviolet light, carrying out a cross-linking reaction on the photosensitive resin under the irradiation of the ultraviolet light to form a gel on the surface of theceramic powder, and uniformly coating the ceramic powder with the gel to obtain the ceramic material. The method is environmentally friendly, low in cost, high in universality, simple in process, short in preparation period and capable of effectively solving the photocuring manufacturing problem of ceramic parts such as silicon nitride and titanium dioxide.

The invention discloses free radical-positive ion-oxide conjunctiva triple curing resin and a preparation method thereof. The preparation method comprises the following steps: (1) heating a compound, which contains at least two epoxy groups, and 4-metoxyphenol, dropwise adding unsaturated vegetable oleic acid containing an alkali catalyst, and reacting; (2) dissolving the products obtained in the step (1) in methylene dichloride, adding triethylamine, then dropwise adding acryloyl chloride, and reacting to obtain the free radical-positive ion-oxide conjunctiva triple curing resin. The free radical-positive ion-oxide conjunctiva triple curing resin and the preparation method can solve the problems that a thick film is incomplete in drying and a dark coating film is not easy to dry; the free radical-positive ion-oxide conjunctiva triple curing resin is high in curing speed, high in curing degree and low in curing shrinkage, and has the advantages of being economical, energy-saving, environment-friendly and the like.

The embodiment of the invention discloses a 3D printing method and device based on a thermocuring mechanism. The 3D printing method comprises the step that a light source is used for irradiating liquid slurry which generates heat by absorbing light and is subjected to thermocuring according to a set path. The device comprises the light source, and the light source can irradiate the liquid slurry which generates heat by absorbing light and is subjected to thermocuring according to the set path. According to the embodiment, the liquid slurry is cured through a thermal initiation mode, and the curing depth can be increased.