71 results about "Optical brightener" patented technology

Fluorescent whitening agents (FWA) or optical brighteners based on bicyclic heterocyclic compounds (I) and (II) are suitable for use in consumer products: Wherein the variables are as defined in claim

A UV / HEVL filterable SiHy contact lens is described herein that not only has a relatively high UV / HEVL filterability but also has an aesthetically attractive color. Bulk siloxane hydrogels for UV / HEVL filterable SiHy contact lenses comprise repeating units of (1) at least one hydrophilic ethylene monomer, (2) at least one siloxane-containing ethylene monomer and / or at least one polysiloxane ethylene crosslinking agent, (3) at least one UV-absorbing ethylene monomer, (4) at least one crosslinking agent, and (5) at least one crosslinking agent. And (4) at least one polymerizable HEVL-absorbing compound capable of absorbing HEVL between 380 nm and 450 nm, and further comprising at least one blue colorant and at least one optical brightener distributed in the bulk siloxane hydrogel.

The utility model relates to the technical field of chemical equipment, and discloses a fluorescent whitening agent crystallization kettle temperature control device which comprises a stirring mechanism, and a cooling mechanism is arranged on the right side of the stirring mechanism; the stirring mechanism comprises a crystallization kettle body, a rotating rod is rotatably connected to the interior of the crystallization kettle body, a motor is fixedly connected to the top of the rotating rod, a connecting ring is fixedly connected to the outer side of the rotating rod, stirring blades are fixedly connected to the outer side of the connecting ring, and connecting rods are fixedly connected to the left side and the right side of the rotating rod; the outer side of the connecting rod is fixedly connected with a supporting ring, and the outer side of the supporting ring is fixedly connected with a scraping plate and a guide plate. According to the temperature control device for the fluorescent whitening agent crystallization kettle, by arranging the connecting rings and the stirring blades and utilizing the auxiliary effect of the scraping plate and the guide plate, it is guaranteed that fluorescent whitening agent raw materials are evenly mixed and efficiently stirred in the crystallization kettle body, the production efficiency is improved, and raw material waste is reduced.

The invention discloses a degradable plastic quality release and demolding residue traceability management method, and relates to the technical field of quality release traceability, and the method comprises the following steps: 1, doping a fluorescent whitening agent European in a polylactic acid matrix to form an inner channel, attaching a polyvinyl alcohol witness sheet to the edge of a cavity, and presetting riboflavin to form an outer channel, establishing a dual-channel ultraviolet detection position; 2, collecting two paths of intensity, calculating a ratio coefficient, and establishing mapping with surface residues to form red, yellow and green threshold values and a correction list; 3, a workpiece is judged through a black box, spray volume, wind shear and mold temperature instructions are automatically given, a witness piece is separated from warm water and confirmed through a background, and meanwhile a cavity-level demolding event is generated and bound with the digital link two-dimensional bar code; and step four, third-party compliance files are archived in a ticket-folder manner with quantiles as reference to a reconvergence threshold value, so that mold-crossing and line-crossing consistent release and verifiable traceability are realized, and food contact and compostable boundaries are considered. And the release efficiency and stability are improved.

The application discloses a preparation method of a nano TiO2 composite fluorescent whitening agent and relates to the technical field of fluorescent whitening agents. The method comprises the following steps: firstly, one-time condensation is carried out on cyanuric chloride and 4,4'-diamino-stilbene-2,2'-disulfonic acid; secondly, secondary condensation is carried out on diethanolamine, and quaternary ammonium is formed by using epichlorohydrin in the secondary condensation process; finally, tertiary condensation is carried out on amino nanoparticles, so that the nano TiO2 composite fluorescent whitening agent is obtained. The nano TiO2 composite fluorescent whitening agent prepared by the application has the characteristics of good ultraviolet aging resistance and water solubility.

The application discloses a fluorescent whitening functional auxiliary and a production process thereof, and relates to the technical field of functional dyes. The fluorescent whitening functional auxiliary comprises the following raw materials in parts by weight: 35-45 parts of a fluorescent whitening agent, 8-10 parts of gamma-cyclodextrin, 4-6 parts of a pH buffer, 2-3 parts of a dispersing agent, and 50-70 parts of deionized water. In the application, L-cysteine is reacted with 2-methyl-2-propenoic acid-2,2,6,6-tetramethyl-4-piperidyl ester to generate a sulfide compound, 4,4'-diaminostilbene-2,2'-disulfonic acid is reacted with cyanuric chloride to generate a monosubstituted compound, the monosubstituted compound is reacted with 7-hydroxy-4-methylcoumarin to generate a disubstituted compound, and the disubstituted compound is reacted with the sulfide compound to generate the fluorescent whitening agent. The fluorescent whitening functional auxiliary prepared in the application has excellent dispersibility, stability and anti-aging performance.

Use of compounds of formula (II) as fluorescent whitening agents or optical brighteners; wherein the compounds of formula (II) have the structure: wherein Y and R are as defined in claim 1. Also sh

The invention discloses an acid-resistant efficient whitening agent for cotton, which contains 0-20% of a fluorescent whitening agent C.I.220; 0 to 20% of a fluorescent whitening agent C.I.47; 0-70% of anhydrous sodium sulphate; 0 to 0.10% of disperse violet RL; and 0 to 0.10% of disperse blue BGL. The components of the screened whitening agent are two tetrasulfonic acid whitening agents which are compounded, and proper dyes are added, so that the whiteness can be improved by 17 CIE value, the same whiteness or higher whiteness can be achieved by using fewer whitening agents, and the effects of reducing cost and improving efficiency are achieved.

This invention belongs to the field of polymer material additives, and provides a fluorescent whitening agent anti-migration stabilizing excipient and its preparation method. The method involves intercalating 4,4'-bis(2-sulfonate sodium styryl)biphenyl into a zinc-aluminum layered double hydroxide, and then surface-coating it with ethanolamine-modified polypropylene grafted with maleic anhydride compatible components. This is followed by melt granulation with a polypropylene carrier resin, bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, and 2-(2H-benzotriazol-2-yl)-4,6-di-tert-amylphenol. This achieves low migration, high retention, and stable dispersion of the fluorescent whitening agent, solving the problems of easy migration, insufficient thermo-photoaging stability, and difficulty in balancing processing window and toughness in polypropylene systems. This method is suitable for the industrial preparation and application of polypropylene whitening modified materials.

To appropriately set gamma correction characteristics for paper to which a fluorescent whitening agent is added.SOLUTION: The image data acquisition unit 21 acquires first image data obtained by reading the chart on the reference paper and acquires second image data obtained by reading the chart on the target paper. The gradation correction processing unit 22 (a) specifies the gradation characteristic of the target sheet based on the second image data, (b) specifies the correction target range based on the density gradient in the gradation characteristic, and (c) corrects the correction target range in the gradation characteristic of the target sheet based on the gradation characteristic of the reference sheet based on the first image data. The correction characteristic setting unit 23 sets the gamma correction characteristic for the target paper on the basis of the gradation characteristic for the target paper after the correction target range is corrected. The target paper contains a larger amount of the fluorescent brightener than the reference paper.SELECTED DRAWING: Figure 1

A resin based material whose composition includes a light-curable mixture of monomers of no more than 35 wt. % of an ethoxylated difunctional bisphenol A dimethacrylate; of no more than 10 wt. % of a methacrylate monomer; of no more than 10 wt. % of a difunctional urethane acrylate; of no more than 0.1 wt. % of an optical brightener; of no more than 5 wt. % of silica particles having methacrylate functionalization layers and having an average particle size of less than about 200 nm; of having more than 40 wt. % of an inert glass; of no more than 15 wt. % of a heavy metal oxide; of no more than 2.5 wt. % of an ultraviolet / visible (UV / Vis) light-photo-polymerization initiator; a colorant; and a stabilizer.

The utility model discloses a fluorescent whitening agent synthetic device convenient to discharge, including synthetic cylinder, the bottom of synthetic cylinder is conically arranged, the bottom center of synthetic cylinder is fixedly connected with the discharge cylinder perpendicularly, and the inner wall of synthetic cylinder is sleeved with the fixed ring, and the inside center of synthetic cylinder is fixedly connected with the inner tube perpendicularly, and the inner tube is arranged at the bottom of fixed ring, and the inner tube is rotatably connected with the auger, and the auger is arranged in the inner portion of discharge cylinder, and the rotating mechanism of rotating auger is arranged in the inner portion of synthetic cylinder, and the stirring mechanism is arranged in the inner portion of synthetic cylinder, and the outer surface of synthetic cylinder is sleeved with the support ring, and the surface of support ring is fixedly connected with a plurality of support legs perpendicularly. The utility model discloses a setting, can be convenient for the material that needs mixing in the inside of synthetic cylinder to be transported upward through the inner tube when using, is convenient for the inside of synthetic cylinder to turn over material, and the setting of two stirring rods is also matched, and the mixing effect of material is also improved, and the auger reverse rotation is also convenient for the material in the inside of synthetic cylinder to be discharged.

This invention belongs to the field of functional polymer masterbatches and provides a highly concentrated fluorescent whitening agent masterbatch and its preparation method. The invention involves melting and wetting fluorescent whitening agent OB-1 with a polyethylene-acrylic acid copolymer to form composite microparticles, which are then melt-dispersed and granulated with polyethylene wax, a composite antioxidant system, and a carrier resin composed of polyethylene or a combination of polyethylene and ethylene-vinyl acetate copolymer. This constructs a high-content, fine-particle-size, and uniformly distributed granular masterbatch system, achieving a coordinated improvement in OB-1 dispersion stability, retention of effective whitening components, melt processing flow, and thermal processing stability. It reduces the proportion of free crystals, agglomeration degree, fuming, and agglomeration risks, solving the problem of balancing dispersion stability and whitening performance, as well as processing flow and thermal stability in highly concentrated whitening masterbatches. This invention is suitable for whitening processing of modified plastics, recycled plastics, and polyolefin products.

A photoinitiator package comprising one or more bisacylphosphine oxide photoinitiators, one or more additional acylphosphine oxide photoinitiators and one or more optical brightening sensitizers, a photopolymerizable composition comprising the photoinitiator package and suitable polymerizable compounds, a method for polymerizing the photopolymerizable composition and the use of the photoinitiator package in photopolymerization applications.

The invention relates to high-reflectivity ink with yellowing resistance, which is composed of a main agent and a curing agent, the main agent and the curing agent are in a mass ratio of (2-4): 1, the main agent comprises the following components in parts by weight: 27-40 parts of acrylic resin, 30-40 parts of titanium dioxide, 0.1-1.2 parts of fluorescent whitening agent and 2-4 parts of photoinitiator; the acid value of the acrylic resin composition is 30-50 mgKOH / g, and the acrylic resin is styrene-free copolymerized acrylate resin; the curing agent is prepared from 6.5 to 8 parts of epoxy resin, 3.8 to 4.2 parts of triglycidyl isocyanurate and 0.2 to 0.7 part of melamine.

The utility model discloses a fluorescent whitening agent slurry vacuum degassing device of anti -spill, including degassing furnace, and the degassing mechanism includes two first connecting tubes, and the one end of two first connecting tubes is connected with the U type anti -spill pipe of intercommunication, and the other end of two U type anti -spill pipes is connected with the second connecting tube of intercommunication, and the other end of two second connecting tubes is located inside the bottom of degassing furnace, and the top of degassing furnace is fixed with the conical cover, and the inner wall bottom of conical cover is fixed with the sealing plate, and the top of sealing plate is installed with vacuum pump, and the air inlet end of vacuum pump is connected with the duct of intercommunication, and the other end of duct is located inside the top of degassing furnace. The utility model has formed good sealing effect in the process of degassing, improved the efficiency of degassing, and improved the quality of fluorescent whitening agent slurry, and sealing effect avoided the outside air backwash, maintained the stable vacuum environment in the degassing furnace, reduced the equipment operation failure caused by the pressure fluctuation.

The utility model relates to the field of fluorescent whitening agent production technology discloses a fluorescent whitening agent high temperature high pressure synthetic device with monitoring mechanism, including the reaction kettle, the reaction kettle outer wall bottom fixedly equipped with heating sleeve, heating sleeve top one side is provided with the oil inlet pipe, heating sleeve bottom is provided with the oil outlet pipe, and the oil outlet pipe is uniformly fixedly installed with the valve on the oil inlet pipe, heating sleeve bottom circumference equidistance fixedly connected with three support legs, heating sleeve outer wall one side is fixedly connected with the mounting bracket, and the mounting bracket outside is fixedly connected with the copper plate, and the copper plate outside is fixedly connected with the semiconductor refrigeration plate, and the one side of semiconductor refrigeration plate close copper plate is the refrigeration surface. The utility model, realized can fast the reaction kettle inside temperature and maintain in stable state, avoid because temperature abnormal heightening influence fluorescent whitening agent production, maintain the reaction kettle operation stability, guarantee equipment safe and reliable operation.

The invention belongs to the technical field of organic compounds and artificial boards, and relates to a whitening agent, a preparation method thereof and application of the whitening agent in whitening type medium density fiberboards, the whitening agent comprises the following components by mass percent: 2-5% of hydrogen peroxide, 0.2-0.6% of sodium silicate, 0.5-1.5% of sodium hydroxide, 0.1-0.4% of water-soluble stilbene fluorescent whitening agent and the balance of water. The preparation method comprises the following steps: sequentially adding the components into water at 60-65 DEG C, stirring and dissolving, and keeping the temperature at 60 DEG C for later use. When being applied, the cleaning agent is added in a wood chip washing process, the mass of the cleaning agent is 1-1.5% of the total mass of cleaning water for the first time, and 0.05-0.08% of the cleaning agent is supplemented per hour subsequently. According to the whitening agent, through the synergistic effect of chemical oxidation and physical color complementing, the whiteness of a fiberboard reaches 31-36 (only 14 in a conventional process), the physical and chemical properties meet the GB / T 11718-2021 standard, and the whitening agent is environmentally friendly, free of residues, simple to prepare and apply, suitable for industrial continuous production and capable of remarkably improving the added value of products.

The utility model relates to the technical field of screw conveyors, and provides a detachable and washable screw conveyor for fluorescent whitening agent processing, which comprises a machine plate, a machine barrel, a lifting assembly, a machine cover, a conveying assembly and a gutter channel, the machine barrel is arranged on the upper side of the machine plate, the lifting assembly is arranged between the machine plate and the machine barrel, the machine cover is movably arranged on one side of the machine barrel through a detachable assembly, and the conveying assembly is arranged on the machine cover. A groove matched with the side wall of the machine barrel is formed in the machine cover, a sealing gasket is fixedly connected into the groove, the machine cover can be installed on the machine barrel in a sealed mode so that fluorescent whitening agent materials in the machine barrel can be conveyed in a sealed mode, the conveying assembly is arranged on the machine cover, and the water flowing groove is formed in the machine plate and located on one side of the machine barrel. And the top end of the machine barrel is communicated with the feeding hopper, so that the fluorescent whitening agent material can conveniently enter the machine barrel to be conveyed. By means of the technical scheme, the problem that in the prior art, disassembly and washing are not convenient is solved.

The utility model discloses a kind of crystal dewatering centrifugal devices of nano fluorescent whitening agent, including shell, the shell is connected with dehydration part, the dehydration part includes: barrier, install in shell left side for crystal anti -dislodgement processing;Centrifugal part, install on the shell, the centrifugal part includes rotationally connected in the centrifugal cylinder of shell, the shell right side is equipped with driving part, the shell right side is fixedly connected with cylinder, the cylinder left side elongated end is fixedly connected with injection plate, the utility model relates to the dehydration technical field of nano fluorescent whitening agent production. The crystal dewatering centrifugal device of nano fluorescent whitening agent, in the cooperation centrifugal cylinder rotation of second motor and gear, tooth ring, make centrifugal cylinder to crystal dewatering process, let air compressor, conduit, three-way valve, injection strip cooperate, carry out dredging to filter hole in centrifugal cylinder, prevent from being affected dehydration operation due to filter end blockage, let cylinder, injection plate cooperate, guide out to crystal in centrifugal cylinder.

The present invention is primarily directed to a polyamide powder composition useful for powder bed additive manufacturing, comprising: (a) 10% by weight to 90% by weight of a polyamide powder A having an intrinsic viscosity calculated according to equation (1) from the flow rate of a solution of the polymer and the solvent, measured in an Ubbelohde viscometer in accordance with ISO Standard 307:2019, apart from the use of m-cresol as the solvent and at a temperature of 20°C, of ​​0.8 to 2.8 with a span between 0.4 and 1.40; (b) 90% to 10% by weight of a polyamide powder B different from the polyamide powder A, having an intrinsic viscosity calculated as above of 0.8 to 2.8 with a span between 0.4 and 1.40; (c) 0 to 40 wt. % of additives selected from flow agents, stabilizers, optical brighteners, and energy absorbing additives and / or fillers; The present invention relates to a polyamide powder composition comprising: It is understood that polyamide powder B is derived from polyamide powder A, and the difference in intrinsic viscosity between powders A and B does not exceed 0.6 in absolute value.

A UV-LED solution comprising an optical brightener, a thickener, and glycerin. The solution can further comprise preservative(s), water and / or alcohol to aid in evaporation of the water or other carrier used for spray or brush application. The solution has adhesive properties, is colorless and odorless and visible when subject to UV light or black light. The solution can be used for tracking purposes, including tracking movement or presence of humans, animals, or pests as well as for temporary marking purposes, where locations, goods, or persons can be marked.

The invention provides a whitening type composite modifier as well as a preparation method and application thereof, and belongs to the technical field of inorganic material modification. The whitening type composite modifier provided by the invention is prepared from the following preparation raw materials in parts by mass: 55 to 65 parts of titanium dioxide, 2 to 5 parts of a fluorescent whitening agent, 15 to 25 parts of an aluminate coupling agent, 5 to 10 parts of a titanate coupling agent, 10 to 20 parts of stearic acid, 2 to 5 parts of a dispersing agent and 1 to 2 parts of an antioxidant. The whitening type composite modifier can be applied to modification of various inorganic powder, the whiteness of the inorganic powder treated by the whitening type composite modifier is obviously improved, and the dispersity and the stability are obviously improved.

Fluorescent whitening agents (FWA) or optical brighteners based on bicyclic heterocyclic compounds (I) and (II) are formulated as a surfactant for use in personal care. The FWA’s have acceptable biod

An illumination device is an illumination device that illuminates an object containing a fluorescent brightener and includes a light emitter that emits white light including violet light whose light emission peak wavelength that excites the fluorescent brightener is less than or equal to 405 nm. A spectral reflectance ρ(λ) is expressed by an intensity EA(λ) / an intensity E(λ), where the intensity EA(λ) is an intensity of reflected light at a wavelength λ and the intensity E(λ) is an intensity of emitted light at a wavelength λ. The reflected light is light reflected off a surface of the object, and the emitted light is light emitted onto the surface of the object containing the fluorescent brightener. The maximum value of the spectral reflectance ρ(λ) at a wavelength λ ranging from 460 nm to 500 nm falls between 0.9 and 1.05, both inclusive.

The inspection and detection device comprises a detection box, a lifting assembly is arranged in the detection box, the lifting assembly is connected with a detection plate, an ultraviolet lamp is fixedly connected to the middle of the top wall of the detection box, and an adjusting assembly is arranged at the upper end of the rear side wall of the detection box. The adjusting assembly is connected with a mounting plate, a camera is fixedly connected to the front side face of the mounting plate, a box door is hinged to the front end of the detection box, and a control panel is fixedly connected to the front side face of the box door. When the device is used, the electric telescopic rod drives the mounting plate to move forwards through the connecting seat, and the sliding ring slides in the middle of the third sliding block, so that the inclination angle of the mounting plate can be adjusted, a camera can shoot a plastic part conveniently, and the camera projects a shot picture to a display screen of the control panel; the detection result of the plastic part can be conveniently observed, and the human body is prevented from being injured by ultraviolet rays.

The embodiment of the application discloses a kind of nanoscale fluorescent whitening agent, chemical fiber and preparation method.Nanoscale fluorescent whitening agent solution preparation method includes: fluorescent whitening agent raw powder is mixed with D5 solvent, and fluorescent whitening agent solution is obtained;In the fluorescent whitening agent solution, chemical fiber is treated with fluorescent whitening, and the mixed liquor after fluorescent whitening treatment is obtained;The mixed liquor is filtered, and the filtrate is centrifuged, and the supernatant is obtained;Wherein, the supernatant is nanoscale fluorescent whitening agent solution, not only simple preparation method, short preparation time, dispersibility and stability are good, can be easily applied to the whitening treatment of polyester fiber, while no waste water is generated in preparation process.

The present invention provides a polymeric composition incorporating a compound of structure (I) or (II) as a fluorescent whitening agent or optical brightener, having the structure: (I), or (II), wherein A is O, or -NH; X is O, or -NR3; the or each Q is independently H or -C(O)AR2; R1 is H, alkyl, alkenyl, polyalkylene glycol or alkoxy-polyalkylene glycol; R2 is H, alkyl, alkenyl, polyalkylene glycol or alkoxy-polyalkylene glycol; and R3 is H, alkyl, alkenyl, polyalkylene glycol or alkoxy-polyalkylene glycol; and wherein R1 and R2 are different from or the same as each other. Also provided is a method of synthesising the compound of structure (I) or (II), use of the polymeric composition, and a plastic product comprising a fluorescent whitening agent or optical brightener according to the first aspect of the invention.

The utility model relates to a fluorescent whitening agent adding device which comprises a box body and a first supporting column, the top of the first supporting column is fixedly connected with a first supporting plate, the top of the first supporting plate is fixedly connected with a second supporting column, the top of the second supporting column is fixedly connected with a second supporting plate, and the bottom of the box body is provided with a first valve. A first discharging pipe is arranged at the bottom of the first valve, a transfer box is arranged at the bottom of the first discharging pipe, a supporting seat is fixedly connected to the top of the second supporting plate, a first motor is installed at the top of the supporting seat, a conveying pipe is installed at the top of the supporting seat, and a feeding hopper is fixedly connected to the top of the conveying pipe; a transmission shaft is arranged on the side edge of the coupler, a spiral auger is arranged in the conveying pipe, and a second motor is installed at the top of the box body. Blanking is even, the blocking phenomenon is avoided, the strength is improved, the stability is improved, and normal operation of the operation process is guaranteed.

Disclosed herein are biodegradable polymer compositions including, based on the total weight of the polymer composition, between 0.1 wt.% and 40 wt.% aPHA and between 60 wt.% and 99.9 wt.% PLA. The composition may optionally include PHA in a weight, based on the total weight of the polymer composition, between 0.1 wt.% and 35 wt.% PHA. However, when both PHA and aPHA are in the composition, the total combined weight of the PHA and aPHA based on the total weight in the polymer composition is 40 wt.% or less. The compositions may have additives included in them, such as colorants, optical brighteners, or radiation stability agents, or combinations thereof. Articles formed from the polymer compositions disclosed herein have improved mechanical properties compared to an article formed from PLA alone.