22results about How to "Improve light resistance" patented technology

The application belongs to the technical field of electromagnetic wave absorbing composite materials, and discloses a high-strength electromagnetic wave absorbing composite material and a preparation method thereof.The high-strength electromagnetic wave absorbing composite material is composed of a wave-transparent layer, a loss layer and a reflection layer, wherein the wave-transparent layer is prepared from glass fiber cloth, quartz fiber cloth, epoxy resin, wave-absorbing polyurethane foam and ultraviolet absorber, the loss layer is prepared from silicon carbide, graphite, conductive fiber, corrosion inhibitor and antioxidant, and the reflection layer is prepared from carbon fiber, graphite, copper powder and preservative.The wave-transparent layer obtained by adding ultraviolet absorber and epoxy resin can enhance the corrosion resistance and light resistance of the wave-transparent layer, the loss layer obtained by adding corrosion inhibitor and antioxidant can enhance the corrosion resistance of the loss layer, and the reflection layer obtained by adding preservative can resist corrosion at the connection between the electromagnetic wave absorbing composite material and other articles, so as to enhance the comprehensive strength of the electromagnetic wave absorbing composite material.

This invention discloses a light-resistant biodegradable plastic, its preparation method, and its application in dustproof netting. The raw material composition of the light-resistant biodegradable plastic, by weight, includes: 60-70 parts polylactic acid (PLA), 10-15 parts lignin, 5-10 parts toughening agent, 5-8 parts UV-shielding agent, 3-5 parts compatibilizer, 1-2 parts composite nucleating agent, and 0-0.5 parts colorant. The UV-shielding agent is composed of sericite, glass microspheres, and fluorite powder. The layered structure of sericite and the spherical structure of glass microspheres reflect ultraviolet light from multiple angles, while the fluorite powder absorbs and converts the transmitted ultraviolet light, thereby shielding ultraviolet rays and increasing the light resistance of PLA. A compatibilizer is used to modify the nano-lignin, which absorbs ultraviolet light and converts the light energy into heat energy in a timely manner, preventing ultraviolet light from attacking the PLA chain segments. It has stable processability, low cost, and stable raw material supply, making it suitable for use in dustproof netting.

The invention discloses a water dispersible 123 light stabilizer which comprises the following components in percentage by mass: 40-60% of a light stabilizer 123, 10-20% of a nonionic emulsifier, 5-15% of an anionic emulsifier, 5-10% of sodium carboxymethyl cellulose and 2-5% of a phosphite antioxidant, and a pH regulator is used for regulating the pH value of a system to 7-9. The preparation method comprises the following steps: premixing, emulsifying and dispersing, homogenizing, and adjusting the pH value to obtain the water-dispersible 123 light stabilizer product. The light resistance of the material can be effectively improved; due to the water dispersion type, the water-based dispersing agent has good dispersity and can be more uniformly distributed in a water-based system, so that the quality stability of a product is improved; compared with some traditional light stabilizers, the stabilizer can be more conveniently applied to a water-based formula system, is beneficial to development of environment-friendly materials, plays a positive role in the fields of water-based paint, water-based ink and the like, and reduces the problem of material performance reduction caused by photochemical degradation.

Provided is a polymer dispersed liquid crystal film having improved light resistance and capable of switching between a transparent state and a scattering state only in a predetermined region. A polymer-dispersed liquid crystal film according to an embodiment of the present invention comprises, in this order, a first conductive substrate, a polymer-dispersed liquid crystal layer comprising a polymer matrix, and liquid crystal droplets and a photopolymerization initiator dispersed in the polymer matrix, and a second conductive substrate. The polymer dispersed liquid crystal layer has, in plan view, a first region and a second region in which the amount of haze change after voltage application differs, and the amount of haze change after voltage application in the first region is smaller than the amount of haze change after voltage application in the second region. The liquid crystal droplets in the second region include a polymerizable liquid crystal compound and a non-polymerizable liquid crystal compound, the liquid crystal droplets in the first region include a liquid crystal polymer that is a polymer of the polymerizable liquid crystal compound and the non-polymerizable liquid crystal compound, and the first conductive substrate includes an ultraviolet blocking layer.

The present invention discloses a method for preparing a light matrix fertilizer for cultivating indocalamus container seedlings. The matrix fertilizer raw materials are calculated by weight and include: 10-15 parts of peat soil, 10-15 parts of forest surface soil, 40-50 parts of fermented bamboo residues, 10-20 parts of mushroom stick waste, 5-10 parts of manure, 5-10 parts of coal slag powder, 10-15 parts of expanded perlite particles, and 5-10 parts of cross-linked microcrystalline cellulose super absorbent resin. The light matrix fertilizer raw materials of the present invention are simple to prepare and low in cost. The indocalamus ramet container seedlings cultivated by using the matrix have high survival rate and new bamboo germination rate, strong new whip germination ability, and vigorous plant growth. At the same time, the seedling culture matrix has the characteristics of loose texture, light weight, good water retention and excellent anti-collapse performance, which is convenient for seedling transportation and mountain planting.

This invention provides a method for dyeing with vat dyes in an overflow dyeing machine. The use of a dye premix significantly improves dyeing performance. The cationic properties of modified cationic starch electrostatically adsorb onto fabric fibers, allowing the coated dye particles to quickly and evenly adhere to the fabric surface. This avoids localized color differences caused by uneven dye dispersion in the dye bath, and the water flow impact in overflow dyeing prevents localized dye aggregation, effectively improving dyeing uniformity and ensuring consistent dyeing results for the same batch of fabrics. The stable structure formed by the cross-linking of modified cationic starch and vat dye forms a protective film on the fabric fiber surface after color fixation, enhancing the binding stability between the dye and fiber, reducing damage to dye molecules from external factors such as light, improving the dye's lightfastness and the fabric's sunlight fastness. Its film-forming properties also make the dye and fiber bond more firmly, preventing fading.

The invention relates to the technical field of wood dyeing, in particular to a process method for regulating and controlling a wood porous cell wall micro-nano structure and dyeing at low temperature. The method comprises the following steps that wood is subjected to delignification treatment in a mixed solution of NaOH and Na2SO3, and delignified wood is obtained; the delignified wood is placed in an H2O2 solution to be subjected to bleaching treatment, and bleached modified wood is obtained; and the bleached and modified wood is placed in a dyeing solution for dyeing treatment, and then color fixing treatment is conducted. According to the method, wood is subjected to delignification / bleaching to regulate and control a cell wall structure, the permeability is improved, micro-nano fluid channels are increased, and reaction binding active sites are increased; and the chemical reaction between the wood fiber and the dye is promoted to generate a fiber-dye covalent bond, so that the problems of color fading and the like of the wood under light, damp and hot conditions are prevented.

The invention relates to a preparation method of a flame-retardant and light-resistant core-shell type water-based acrylate resin coating, which comprises the following steps: adding water, an emulsifier and methacrylic acid into a reaction container, uniformly mixing and stirring, heating to 40-45 DEG C, stirring and reacting for 60 minutes, adding a monomer A, 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and an organic molybdenum compound, and emulsifying for 60-90 minutes; heating to 80-90 DEG C, dropwise adding an initiator, reacting for 1-2 hours, and reacting for 1-2 hours at 70-90 DEG C to obtain a core-layer emulsion; and simultaneously dropwise adding all monomers B and an initiator into all the obtained core-layer emulsion for 1 hour, keeping the temperature and stirring to react for 1.5 hours, adding hydroxypropyl propargyl ether and a coumarin derivative, reacting at 60-70 DEG C for 1 hour, cooling to 50 DEG C, adding an emulsifier, reacting for 30 minutes, and adding ammonia water to adjust the pH value to 7-8, thereby obtaining the flame-retardant and light-resistant core-shell type water-based acrylate resin coating. The obtained acrylate resin is good in molten drop resistance and light resistance.

The present application relates to a kind of naphthalimide derivative polymer dyes, yellow photosensitive resin composition and its application, the structure general formula of dye is as follows: general formula (I);Wherein, n is the positive integer of 1-100, 0 < a ≤ 100, 0 ≤ b < 100, and a+b=100;X1-X4 each is independently selected from any one of hydrogen atom, alkyl, aryl or heteroaryl substituent, Y1-Y5 each is independently selected from any one of hydrogen atom, alkyl, aryl or heteroaryl substituent, Z is selected from any one of oxygen atom, nitrogen atom or sulfur atom;R1-R3 each is independently selected from any one of hydrogen atom, alkyl, alkenyl, ether group, substituted alkyl, aryl or heteroaryl substituent.Compared with prior art, the naphthalimide derivative polymer dyes have high solubility, excellent light resistance and heat resistance, and the yellow photosensitive resin composition prepared based on the dye has high color density.

The fluorane dimer compounds of the present invention are represented by the following general formula (1).

The invention relates to the technical field of computer vision and robots, and provides a pharmacy unmanned vehicle path planning and drug matching method based on JPS and RRT algorithms, and the method comprises the steps: constructing a pharmacy environment map, and determining the real-time position of an unmanned vehicle; performing unmanned vehicle path planning by adopting a JPS-RRT * algorithm to obtain a final driving path; the method comprises the following steps: acquiring a target drug image, constructing a drug feature template library, periodically acquiring drug images in a current visual field, pre-processing the drug images, and matching the pre-processed drug images with the drug feature template library by adopting an SAD template matching algorithm to obtain a drug classification result; and controlling the unmanned vehicle to move to the target position according to the final driving path, and executing a corresponding medicine grabbing or sorting task according to a medicine classification result.

The present application provides a kind of display device laminated body, it is the display device laminated body with substrate layer and functional layer, wherein, the functional layer contains resin, organic ultraviolet absorber and inorganic ultraviolet absorber, the transmission yellow degree determined by the colorimetric method without using integrating sphere is set as the 1st transmission yellow degree, the transmission yellow degree determined by the colorimetric method using integrating sphere is set as the 2nd transmission yellow degree, when the value obtained by the 1st transmission yellow degree of the display device laminated body minus the 2nd transmission yellow degree of the display device laminated body is 0.4 or more.

A novel fluorescent protein and uses thereof are provided. A polypeptide of the present invention has a fluorescence property, the polypeptide being indicated in any one of (1) to (3) below: (1) a polypeptide having an amino acid sequence set forth in SEQ ID NO: 1; (2) a polypeptide having an amino acid sequence set forth in SEQ ID NO: 1, the amino acid sequence having replaced, deleted, inserted, and / or added therein not less than 1 and not more than 32 amino acids; and (3) a polypeptide having not less than 85% sequence identity with respect to an amino acid sequence set forth in SEQ ID NO: 1.

The present application relates to the surface treatment method of pigment, especially relates to a kind of fine surface treatment method of green zinc halogenation phthalocyanine (pigment). Zinc halogenation phthalocyanine is added to NaCl-AlCl3 molten salt system, then ester is added, after reaction, the reactant is watered out zinc phthalocyanine halide, that is, the finished product pigment zinc halogenation phthalocyanine with excellent performance is obtained.The method of the present application uses a new method by controlling the parameter condition of reaction, and prepares green zinc phthalocyanine pigment with small particle size and concentrated distribution and excellent performance, simultaneously proposes a new process route for fine surface treatment of zinc halogenation phthalocyanine, reduces the process method of secondary agglomeration of zinc halogenation phthalocyanine, the present application is simple, easy to implement, and has very good application prospect.

The invention discloses a weather-resistant color master batch and a preparation method thereof, and mainly relates to the technical field of macromolecules. Compared with the prior art, the polypropylene color master batch has the advantages that the polypropylene resin is used as a main base material, the pigments, the dispersing agent, the lubricating agent and other auxiliaries are added, and the modified lignin-polyurethane emulsion is also added, so that the ultraviolet aging resistance and color stability of the polypropylene color master batch are improved. According to the invention, polyacrylamide, cellulose acetate and lignin are synthesized into modified lignin, so that damage and permeation of ultraviolet rays to the color master batch during application are reduced. And then the modified lignin is added into the preparation of the polyurethane emulsion, so that the elasticity, the flexibility and the adaptive capacity to temperature change of the color master batch are enhanced.

A rare earth complex is represented by general formula (1) .         M3+•(HC)n•(L1)m1•(L2)m2•(XL)3-n     (1) [In the formula, HC represents a quinolinonato ligand or coumarinato ligand, L1 represents, for example, a nitrogen-containing ligand, L2 represents, for example, water, XL represents, for example, a halide ion, M3+ represents a trivalent rare earth metal ion, n represents 1, 2 or 3, m1 represents 0, 1 or 2, and m2 represents 0 to 3.]

The invention discloses a water-based acrylic painting pigment and a preparation method thereof, and relates to the technical field of painting pigments. When preparing the water-based acrylic painting pigment, the invention reacts hydroxyethyl cellulose, methyl acrylate, butyl acrylate, and an allyloxytriazine ultraviolet absorber to obtain a cellulose-acrylate copolymer emulsion; tetramethylcyclotetrasiloxane and N,N',N"-[(2,4,6,8,8-pentamethylcyclotetrasiloxane-2,4,6-triyl)tri(oxy)]tri(N-ethyl-ethane) are reacted to obtain a siloxane oligomer; nano-titanium dioxide is reacted with a siloxane oligomer and 1-chlorohexane in sequence to obtain functionalized nano-titanium dioxide; and the cellulose-acrylate copolymer emulsion, the functionalized nano-titanium dioxide, a pigment toner, a dispersant, a defoamer, and water are uniformly mixed to obtain a water-based acrylic painting pigment. The water-based acrylic painting pigment prepared by the invention has excellent mildew resistance, high temperature resistance, and light resistance.

The application provides a kind of phthalocyanine dye containing polymerizable group and a synthesis method and application thereof.The application relates to the field of functional organic dyes, and provides a kind of phthalocyanine dye containing polymerizable group and a synthesis method and application thereof, which introduces halogen atoms, long alkyl chains and polymerizable active groups into phthalocyanine as a parent structure.The active groups introduced can be crosslinked with resins or monomers in a color photoresist component, so that the stability of a thin film can be improved, and the transmittance loss can be reduced.The application overcomes the problem that the light resistance, heat resistance and migration resistance of dye molecules in the prior art are still much poorer than those of pigments.A kind of phthalocyanine dye containing polymerizable group has the structure shown in the following general formula I.

Provided is a polymer that includes a silphenylene skeleton, an isocyanuric acid skeleton, and a hydroxy-group-substituted alkyl ether skeleton in the main chain, and that includes an epoxy group in a side chain.

A thermoplastic resin composition including a polycarbonate resin with a structural unit (A) represented by the following formula (1), wherein a hydrolysate produced by hydrolyzing the polycarbonate resin contains dihydroxy compounds represented by the following formulae (2) to (4), and a total amount of the dihydroxy compound represented by the formula (3) and the dihydroxy compound represented by the formula (4) in the hydrolysate is 0.85% by mass or more of an amount of the dihydroxy compound represented by the formula (2).

The present application relates to a method for improving the performance of aerogel coatings using water-based color paste, including four steps of water-based color paste nanoparticle preparation, environmentally friendly colored water-based color paste preparation, composite phase change aerogel slurry preparation and water-based color paste addition to aerogel; by adding water-based color paste nanoparticles, environmentally friendly dispersants, adding microcapsule phase change materials in the preparation of aerogel, and adding dispersants, bark extraction and various additives in the mixing process of the last two; the water-based color paste is added to the aerogel, which provides a healthier and more environmentally friendly coating option, optimizes the brightness and durability of the coating color, and can improve the appearance quality and service life of the electric products related to water-based color paste coatings, and has a broad market prospect and application demand.