143 results about "Ultraviolet absorbance" patented technology

The invention discloses a preparation method of flame-retardant silicone rubber resistant to long-term thermal aging, and relates to the technical field of high-molecular compound composition anti-aging rubber. The flame-retardant silicone rubber is prepared from the following components in parts by mass: 75 to 100 parts of methyl vinyl silicone rubber raw rubber, 18 to 28 parts of fumed silica, 20 to 35 parts of aluminum oxide trihydrate, 0.5 to 3 parts of platinum flame-retardant synergist, 2 to 5 parts of heat-resistant additive, 1.5 to 2.5 parts of structured control agent, 1 to 2 parts of cross-linking agent, 2 to 10 parts of anti-aging agent and 8 to 13 parts of fluorinated silicone rubber. Through a synergistic flame-retardant system, the silicone rubber disclosed by the invention shows obvious advantages in flame-retardant capability, can reach a higher flame-retardant grade, effectively delays flame propagation, and reduces the risk of fire disasters. The weather resistance of the silicone rubber is remarkably improved due to the ultraviolet absorption function and the anti-oxidation function of the anti-aging agent, so that the silicone rubber can effectively resist ultraviolet rays and oxidation under the long-term outdoor solarization condition, and the performance reduction and the appearance deterioration are reduced.

An aqueous ultraviolet-absorbing resin emulsion, and an aqueous resin emulsion composition containing the emulsion is provided, wherein the emulsion is excellent in compatibility with a synthetic resin and light resistance. Also, the emulsion improves stability in blending with an aqueous emulsion of the synthetic resin, and prevents bleed out of the ultraviolet-absorbing resin on the surface of a coating film. Further, the aqueous ultraviolet-absorbing resin emulsion imparts excellent alkali or solvent resistance to a synthetic resin poor in alkali or solvent resistance. More specifically, an aqueous resin emulsion composition comprising (I) an aqueous ultraviolet-absorbing resin emulsion and (II) an other aqueous resin emulsion is provided, wherein the emulsion (I) is obtained by urethanizing (A) a polyol component having an ultraviolet-absorbing group {e.g., 1,1-bis[3-(2H-benzotriazol-2-yl)-4-hydroxy-benzeneethanol]methane}, (B) a polyol if necessary, (C) an alkyl or aryl dialkanolamine compound, and (D) an organic polyisocyanate in (E) an organic solvent, diluting the reaction mixture with (F) an organic solvent having a boiling point lower than 100° C. to give a resin solution, neutralizing the resin solution with (G) a neutralizing agent, and dispersing the resultant in water.

The invention relates to the technical field of sewage treatment, in particular to a dynamic control method applied to a culture tail water circulation treatment system. The method comprises the following steps: continuously detecting aquaculture tail water on a water inlet pipeline, calculating the ratio of chemical oxygen demand to five-day biochemical oxygen demand as a first degradation index, and calculating the ratio of ultraviolet absorbance to total organic carbon concentration as a second degradation index; according to the first degradation index and the second degradation index, identifying aging complementary and range complementary organic load degradation characteristics, and determining a process treatment path based on the organic load degradation characteristics; performing primary pretreatment on the aquaculture tail water in different process treatment paths to obtain intermediate water quality data; detecting the ammonia nitrogen concentration of the intermediate water quality data, and extracting the time change rate of the ammonia nitrogen concentration as an ammonia nitrogen conversion parameter. According to the invention, the oxygen utilization efficiency and the removal rate of organic matters and nitrogen are improved through regional dissolved oxygen and function configuration optimization.

The invention discloses a fluorescent colorimetric sensor for detecting circulating tumor cells and a preparation method of the fluorescent colorimetric sensor. The preparation method comprises the following steps: S4, adding a prepared detection antibody modified with horse radish peroxidase and used for detecting the circulating tumor cells, and incubating; s5, adding a Tris buffer solution and a H2O2 solution, and incubating; s6, preparing an EuMOF nanoflower solution; and S7, adding the EuMOF nanoflower solution and 3, 3 ', 5, 5'-tetramethyl benzidine to react, detecting the fluorescence intensity in the presence of circulating tumor cells with different concentrations by using a luminoscope, detecting the ultraviolet absorbance value in the presence of circulating tumor cells with different concentrations by using a multifunctional microplate reader, and constructing a fluorescence intensity-concentration working curve and an ultraviolet absorbance value-concentration working curve. The method is used for qualitative and quantitative analysis and detection of the circulating tumor cells, realizes bimodal signal response to the circulating tumor cells, and has high sensitivity and simplicity and convenience in operation.

The invention belongs to the technical field of preparation and surface protection of polyurethane coatings, and particularly relates to weather-resistant polyurethane and a preparation method thereof. The coating provided by the invention is composed of a component A and a component B according to a weight ratio of 1: (0.2-0.4). The component A is prepared from water-based fluorine-containing hydroxy acrylic dispersion resin with a high hydroxyl value, GMA (glycidyl methacrylate) grafted modified water-based acrylic dispersion resin, a benzotriazole ultraviolet light absorber, a light hindered amine stabilizer, rutile titanium dioxide, wet sericite powder, nano zinc oxide and auxiliaries; and the component B comprises an aliphatic isocyanate curing agent and propylene glycol diacetate. By constructing a quadruple synergistic weather-resistant mechanism of ultraviolet absorption, free radical capture, physical shielding and structural densification, the weather resistance and corrosion resistance of the coating are remarkably improved while the coating keeps excellent adhesive force (0-1 level) and hardness (2H-3H), the color change delta E is smaller than or equal to 1.8 after artificial accelerated aging for 1000 hours, the gloss loss rate is smaller than or equal to 23%, and the weather resistance and corrosion resistance of the coating are greatly improved. And the corrosion spreading width of a 600-hour salt spray test lineation is less than or equal to 2.3 mm.

The invention relates to a biaxially oriented casting polypropylene composite film and a preparation method thereof, and belongs to the technical field of packaging materials. The homo-polypropylene, the co-polypropylene, the slipping agent, the nucleating agent, the antioxidant and the modified nano silicon dioxide are used as raw materials to prepare the biaxially oriented casting polypropylene composite film which can be used in the field of food packaging and has high transparency and good antistatic performance and ultraviolet resistance. The nano silicon dioxide is modified, and the ultraviolet light absorber is grafted on the surface of the nano silicon dioxide, so that the problem that the nano silicon dioxide is easy to agglomerate is solved, and the problem that the ultraviolet light absorber is easy to migrate is also solved; through quaternary ammonium salt structure conjugation, the ultraviolet light absorber has better ultraviolet light absorption performance and antistatic performance.

The invention relates to the technical field of water treatment, and discloses a central air-conditioning condensate water disinfection and purification device which comprises a treatment tank main body, an ozone generator and an ozone generator real-time regulation and control system. According to the system, a demand coefficient is dynamically obtained based on residual ozone concentration and ultraviolet absorbance through a pollution load evaluation module; the ozone mass transfer efficiency evaluation module calculates a mass transfer efficiency coefficient based on the tail gas and inlet gas ozone concentration and the gas flow; the matching evaluation module combines the demand coefficient, the mass transfer efficiency coefficient and the water temperature influence factor to generate a matching factor; the generator health monitoring module evaluates a health degree coefficient based on parameters such as air inlet pressure; and the power comprehensive decision-making module fuses the health degree coefficient and the matching factor, and outputs a target power set value through a multi-parameter regulation and control model. The intelligent sensing and dynamic optimization of ozone feeding are realized, the problems of traditional control stiffness, low mass transfer efficiency and insufficient equipment guarantee are solved, and the energy utilization rate and the operation reliability are improved while the disinfection effect is ensured.

To provide a polarizing film with an adhesive layer, which can solve a problem of decrease in a yield, can impart a sufficient function of blocking UV rays even when a polarizing film is thin, and can suppress curling, and to provide an image display device using the polarizing film with an adhesive layer.SOLUTION: A polarizing film 1 with an adhesive layer is to be used on a visible side of an image display part in an image display device; and the polarizing film 1 with an adhesive layer includes a polarizing film 5 and adhesive layers 2a, 2b on both surfaces of the polarizing film 5. The polarizing film 5 includes a polarizer 4 and transparent protective films 3a, 3b on both surfaces of the polarizer. The transparent protective film 3a on a visible side of the polarizer 4 has a transmittance of less than 6% at a wavelength of 380 nm; and the adhesive layer 2a on a visible side of the polarizing film 5 has an ultraviolet absorption function.SELECTED DRAWING: Figure 1

The invention discloses alcohol-resistant aging-resistant waterborne polyurethane and a preparation method thereof.The alcohol-resistant aging-resistant waterborne polyurethane is of a unique core-shell structure, a core layer is fluorine-containing polyurethane and is prepared through a reaction of fluorine-containing polyol, polyisocyanate and the like, the molar ratio of the fluorine-containing polyol to the polyisocyanate is 1: 2-1: 4, and a double-bond-containing chain extender is introduced; the shell layer is an acrylate copolymer containing an ultraviolet absorption monomer, the ultraviolet absorption monomer accounts for 10-40%, the shell layer further contains a multifunctional cross-linking agent, the shell layer is formed by compounding at least two acrylate monomers with different polarities, the core and the shell are connected through chemical bonds, and bonding is enhanced through a silane coupling agent KH-570. The preparation process comprises the steps of fluorine-containing polyurethane core layer preparation, neutralization and pre-dispersion, shell layer polymerization, post-treatment and the like. The prepared waterborne polyurethane has greatly improved alcohol wiping resistance and excellent xenon lamp aging resistance, and can be widely applied to the fields of automotive interiors, consumer electronics coatings and the like.

The present application relates to thermal insulation coating technical field, specifically to a kind of low VOCs ultraviolet resistant thermal insulation coating composition and its performance testing device, consisting of the following mass parts components: water-based acrylic resin 30-45 parts, nitrogen-doped graphene 1-3 parts, nano composite powder 2-5 parts, low water absorption and expansion glass microsphere 8-12 parts, silane coupling agent modified sepiolite 5-10 parts, silane coupling agent KH560 0.5-1.5 parts, ultraviolet absorber UV-9 0.3-0.8 parts, hydroxyethyl cellulose thickening agent 0.2-0.5 parts;Composition meets the following conditions: (1) VOCs content≤50g / L;(2) ultraviolet absorption rate≥95%;The present application realizes the purpose that VOCs content is far lower than traditional solvent type coating through the synergistic effect of water-based acrylic resin system and low water absorption and expansion glass microsphere, while nitrogen-doped graphene and nano ITO-SiO2 Composite powder form ultraviolet-infrared dual-effect shielding layer, ultraviolet absorption rate, infrared reflectivity greatly improve, solve the problem that traditional anti-UV coating function is single, VOCs is overproof.

The application discloses a kind of ultraviolet absorber with triazine ring as main structure and its preparation method and its application in aramid fiber, the ultraviolet absorber has the following structural formula: Wherein, R1, R2, R3, R4 It is the group containing phenyl or substituted phenyl, R5 It is piperidyl, piperazyl, pyrrolidinyl and one of the following structures:This ultraviolet absorber has good absorption to UVA-UVB band ultraviolet, especially in 290~320 nm range has good ultraviolet absorption, adding the ultraviolet absorber in aramid fiber can significantly improve its weather resistance and service life, keep mechanical property, delay ultraviolet degradation, reduce the direct damage of fiber.

A component processing method is provided that can prevent damage to the workpiece (component, etc.) even when a rigid substrate is peeled off from the workpiece. The component processing method of the present invention includes: a lamination step in which a rigid substrate, an ultraviolet absorbing layer, and a workpiece are sequentially laminated; a processing step in which the workpiece is processed; and a peeling step in which the ultraviolet absorbing layer is irradiated with ultraviolet light to peel the rigid substrate off from the workpiece.

This invention discloses a composite transparent film and its preparation method, relating to the technical field of polymer materials. The preparation method of the composite transparent film includes the following steps: (1) melting and blending vermiculite and fluororubber to obtain fluorinated vermiculite; then mixing the fluorinated vermiculite and mica evenly to obtain composite clay; (2) mixing polyvinyl alcohol solution, composite clay, and SESC lignin evenly to obtain a precursor solution, wherein the mass ratio of polyvinyl alcohol, composite clay, and SESC lignin is 45:45:(8-12); then spreading and drying the precursor solution on a substrate by casting, followed by heat treatment to obtain the composite transparent film. The composite transparent film of this invention possesses excellent water vapor barrier properties, ultraviolet absorption capacity, good transparency, high mechanical strength, and weather resistance.

The application relates to the technical field of ultraviolet absorbing materials, and discloses a preparation method of a composite ultraviolet absorbing agent, which comprises the following components in percentage by weight: 50-70% of an ultraviolet absorbing agent, 10-20% of a light stabilizer, 5-15% of an antioxidant, 2-5% of a dynamic crosslinking agent, and 0.5-2% of an auxiliary additive. The preparation method comprises the following steps: dissolving the ultraviolet absorbing agent, the light stabilizer and the antioxidant in a mixed solvent to stir and form a uniform solution, adding the dynamic crosslinking agent to perform crosslinking reaction, then removing the solvent by vacuum evaporation, and grinding and drying to obtain the target product. The composite ultraviolet absorbing agent is prepared through the synergistic effect of the components and the construction of a dynamic crosslinking network, the ultraviolet absorbing performance, the chemical stability, the thermal stability and the low migration property are remarkably improved, and the composite ultraviolet absorbing agent can be widely applied in the fields of plastics, coatings, textiles and the like.

The invention relates to a preparation method of a high-performance ink material for a writing pen, and belongs to the technical field of ink materials. The high-performance ink material for the writing pen is obtained by self-making the modifier and blending the modifier with the pigment and other auxiliaries, and the modifier connects the benzotriazole with the hydroxypyridine, so that a conjugated system is expanded, the ultraviolet absorption strength of the modifier is higher, the efficiency is higher, and the ink material is more suitable for the writing pen. Ether introduced by pyridine can be used as a hydrogen bond acceptor to form a hydrogen bond with resin in an ink system, so that the ultraviolet light absorber is prevented from being separated out; quaternary ammonium salt cations in the modifier can improve the adhesive force and color fastness of the ink and the friction resistance and water resistance after writing; meanwhile, tert-butyl in the modifier reduces surface tension through steric hindrance, promotes leveling of ink and ink mark uniformity and enhances dispersion stability among resin, auxiliaries and pigment, so that the ink is not prone to layering and deterioration after being placed for a long time.

This application provides a method for preparing gallium oxide (GaO) with enhanced ultraviolet absorbance and a GaO material prepared according to this method. First, a GaO thin film capable of generating ultraviolet absorption is grown on a substrate by magnetron sputtering. The GaO thin film is then annealed. Next, a copper thin film is grown on the GaO thin film by magnetron sputtering, followed by rapid annealing, causing the copper film to crack into copper nanoparticles under heat. This preparation method utilizes copper nanoparticles to enhance the ultraviolet absorption performance of GaO. The process steps are simple and easy to operate, thus effectively reducing the preparation cost. Furthermore, the GaO material prepared by this method shows a significant improvement in ultraviolet absorbance.

The invention discloses a colorimetric detection method for cMyBP-C protein based on nano-enzyme activity, preparation of a bismuth selenide / nano-gold composite material and application of the bismuth selenide / nano-gold composite material in protein detection. The method comprises the following steps: performing ultrasonic stripping on a bismuth selenide block to obtain a few-layer bismuth selenide dispersion liquid; and then sequentially adding a sodium borohydride aqueous solution and a chloroauric acid aqueous solution under a stirring condition, and carrying out in-situ reduction to form gold nanoparticles loaded on the surface of bismuth selenide. The composite material has the capability of catalyzing reduction of p-nitrophenol into p-aminophenol, and the color of the solution is changed from yellow to colorless. After the cMyBP-C antibody is modified on the surface of the composite material, the catalytic activity is inhibited; after a to-be-detected sample is added, the antibody and the protein are specifically combined to cause dissociation, and the catalytic activity is recovered. The cMyBP-C protein is quantitatively detected by observing the color change of the solution or monitoring the reduction of the ultraviolet absorbance at 400 nm.

The present application relates to the technical field of paint, and discloses a preparation method of a spherical alumina-cordierite composite refractory paint composition, wherein 100 parts by weight of epoxy resin, 1-5 parts by weight of an amino-terminated polymer ultraviolet absorber, 15-28 parts by weight of a filler spherical alumina trihydrate and cordierite, 29-32 parts by weight of a curing agent and the like are stirred and uniformly mixed to obtain the spherical alumina-cordierite composite refractory paint composition.The polymer ultraviolet absorber contains an ortho-hydroxybenzotriazole group, which can improve the ultraviolet absorption characteristics and ultraviolet aging resistance of the paint.The polymer, as an absorber, contains a biphenyl structure with thermal stability, which is beneficial to improving the thermal decomposition temperature, heat resistance and water resistance after being co-cured with the epoxy resin.The addition of the spherical alumina trihydrate and cordierite improves the limiting oxygen index of the paint coating and improves the flame-retardant fire resistance.

Compositions Containing a UV Absorbing System Including a UV Attenuating Physical Material and an Oil to Inhibit Aggregation of the UV Attenuating Physical Material. This disclosure relates to compositions including a UV absorbing system comprising at least one ultraviolet (UV) attenuating physical material and at least one oil to inhibit the aggregation of the ultraviolet (UV) attenuating physical material, as well as processes for preparing and using such compositions. Figure for abstract: none

A thermoplastic molding composition P comprising: AB: at least one graft copolymer composition AB, consisting of at least one thermoplastic copolymer A and at least one graft copolymer B; C: at least one UV absorber as component C; and D: optionally at least one further additive as component D, wherein the UV absorber component C comprises at least one organic or inorganic component having an UV absorption at least in a wavelength range ≤380 nm; and wherein the UV absorber component C is at least partially selected from at least one black pigment, at least one white pigment and / or at least one dye having an UV absorption at least in a wavelength range ≤380 nm.

The present disclosure relates to compositions including a UV absorbing system including at least one physical ultraviolet (UV)-attenuating material, at least two polyols, and at least one anionic polysaccharide thickening agent, as well as to methods of making and using such compositions.

The application provides a skin care composition containing siloxane treated cerium oxide and a preparation method thereof, and belongs to the technical field of cosmetics. The skin care composition comprises the following components: 5-15% of siloxane treated cerium oxide, 0.5-1.5% of sodium chloride or magnesium sulfate, 10-20% of a humectant, 0.1-1.5% of an antioxidant, 0.5-2% of a thickening agent, 0.001-4% of a skin conditioning agent, 2-6% of an emulsifier, 10-35% of an emollient, 0.05-0.25% of a fragrance, 0-10% of a filler, and water in a residual amount. The application adds the siloxane treated cerium oxide in the skin care composition, compared with traditional physical sunscreen agents, and overcomes the disadvantages of pale color and low ultraviolet absorption efficiency. Secondly, through the design of a multiple emulsification system formula, the purpose of high content of the siloxane treated cerium oxide is achieved, and the characteristics of moisturizing, lightness and non-stickiness are achieved.

The invention provides a sun shading film based on transparent polyimide and a high-temperature-resistant functional layer and a preparation method of the sun shading film, and relates to the technical field of polymer functional film materials. The sun shading film comprises a plurality of layers of composite structures which are stacked in sequence, the multi-layer composite structure comprises a first transparent polyimide base film, an ultraviolet absorption layer arranged on the surface of the first transparent polyimide base film, an absorption function layer arranged on the surface of the ultraviolet absorption layer and a second transparent polyimide base film arranged on the surface of the absorption function layer. A bonding layer is arranged on the back surface of the first transparent polyimide base film, and a release film is arranged on the back surface of the bonding layer. The sun shading film has high thermal stability, high optical heat insulation performance and good constructability, and is suitable for high-temperature heat insulation application scenes of building glass, vehicle glass and special optical windows.

The present invention provides a cellulose acylate film containing a specific ultraviolet light absorber, a polarizing film using the cellulose acylate film, and a liquid crystal display device, the cellulose acylate film contains more than two ultraviolet light absorbers, at least one of the ultraviolet light absorbers is required to satisfy the following conditions: the absorption capability is mainly concentrated in a 315-400 nm wave band, and the absorption capability of the other one of the ultraviolet light absorbers is not concentrated in a 315-400 nm wave band, and the absorption capability of the other one of the ultraviolet light absorbers is not concentrated in a 315-400 nm wave band. The absorptive amount of the wave band needs to account for 75% or above of the total absorptive amount of the wave band within 250-600 nm, and the wave band has excellent durability such as weather resistance and heat resistance and can block ultraviolet rays with long waves of 380 nm or below. The prepared cellulose acylate film is excellent in spectral absorption performance, little in coloring, excellent in transparency and sufficient in ultraviolet absorption capacity, even if the cellulose acylate film is exposed to high-temperature and high-humidity conditions for a long time, ultraviolet rays can be effectively blocked, and the cellulose acylate film meets the increasing market requirement for use in severe environments.

To provide a layered double hydroxide with a novel function in addition to an adsorption function of a volatile sulfur compound.SOLUTION: A copper-containing layered double hydroxide represented by a formula (1) below is provided. The copper-containing layered double hydroxide is obtained by reacting an aqueous solution containing copper with an aqueous solution containing aluminum under conditions where the pH is 8 or higher. Cu1-xAlx(OH)2An-x / n mH2O (1) (in the formula (1), An- is an n-valent anion, x is a number satisfying 0<x<1, n is a number satisfying 1≤n, and m is a number satisfying 0<m).SELECTED DRAWING: None

The invention relates to the technical field of coatings, and discloses a preparation method of a spherical alumina-cordierite composite refractory coating composition, which comprises the following steps: uniformly stirring and mixing 100 parts by weight of epoxy resin, 1-5 parts by weight of amino-terminated polymer ultraviolet absorbent, 15-28 parts by weight of filler spherical alumina trihydrate and cordierite, 29-32 parts by weight of curing agent and the like; the spherical aluminum oxide-cordierite composite fireproof coating composition is obtained. The polymer ultraviolet absorbent contains an o-hydroxybenzotriazole group, so that the ultraviolet absorption characteristic and the ultraviolet aging resistance of the coating can be improved, and the polymer as the absorbent contains a biphenyl structure with thermal stability, so that the thermal decomposition temperature, the heat resistance and the water resistance and water resistance can be improved after the polymer is co-cured with the epoxy resin. Meanwhile, spherical alumina trihydrate and cordierite are added, so that the limit oxygen index of the coating is increased, and the flame-retardant and fire-resistant performance is improved.

The present invention relates to an optical filter which is sequentially provided with a dielectric multilayer film (1), a substrate having a near-infrared absorbing glass and a resin film, and a dielectric multilayer film (2), the resin film containing a near-infrared absorbing dye, an ultraviolet absorbing dye, and a resin, and which satisfies all specific spectral characteristics (i-1) to (i-9).

The invention discloses a multifunctional sunroof protective film. The sunroof protective film is composed of a base material layer, an ultraviolet absorption layer, a heat insulation layer and an anti-impact layer, the base material layer serves as a supporting structure and is located on the bottommost layer, the ultraviolet absorption layer and the heat insulation layer are sequentially stacked on the base material layer, and the anti-impact layer is arranged on the outermost layer. All the layers are firmly combined through a macromolecular adhesive to form an integral composite structure. The invention further discloses a preparation method of the multifunctional skylight protective film. The sunroof film solves the problems that an existing sunroof film is weak in ultraviolet-proof capacity and lacks an anti-impact protection function.

Provided are: a (meth) acrylic copolymer which excellently absorbs laser light having a wavelength of 266 nm or 355 nm; a composition for forming an adhesive layer; a laminate; and a method for producing and processing an adhesive layer. A (meth) acrylic copolymer includes a structural unit derived from a polymerizable monometer containing an ultraviolet-absorbing moiety represented by general formula (6), and a structural unit different from the structural unit. [Chemical Formula 1]