34 results about "Pigment synthesis" patented technology

The invention relates to the technical field of pigment synthesis, and particularly discloses a synthetic method of ornamental blue. According to the synthetic method, 5-hydroxy-3-iminopyridine-2, 6-diketone is adopted as a raw material, enol interconversion is performed on the raw material under the alkaline condition (under the action of an alkali catalyst), heating is performed, and chemical condensation reaction is performed to obtain the ornamental blue. The synthetic method of the ornamental blue provided by the invention is simple in process and high in reaction selectivity, the yield and purity of the product are high, the yield of the ornamental blue product is more than or equal to 80%, the purity of the ornamental blue product is more than 99%, the synthetic method has obvious advantages, no potential safety hazard exists in the process, and industrial production can be realized.

The invention discloses a preparation method of a high-temperature-resistant benzidine yellow pigment, and belongs to the technical field of pigment synthesis, and the high-temperature-resistant benzidine yellow pigment is prepared by diazotizing 3, 3 '-dichlorobenzidine, coupling the diazotized 3, 3'-dichlorobenzidine with a sulfonimide modified acetoacetanilide derivative to obtain a pigment compound, and finally compounding the obtained pigment compound with sulfanilamide group grafted polyethersulfone. According to the high-temperature-resistant benzidine yellow pigment prepared by the preparation method disclosed by the invention, the high-temperature-resistant performance of the benzidine yellow pigment is remarkably improved and the use performance of the benzidine yellow pigment is improved by introducing the sulfonimide group and the polyethersulfone grafted with the sulfanilamide group for synergistic modification.

The invention discloses a preparation method of prune exosomes and application of the prune exosomes in regulation and control of pigment metabolism and skin cell inflammatory response, and the preparation method comprises the following steps: taking prune, washing, peeling, dicing, juicing, adding a compound enzyme preparation, centrifuging at 2,000 g for 20 min, carrying out trehalose-assisted ultracentrifugation, centrifuging at 12,000 g for 30 min, centrifuging at 40,000 g for 60 min, centrifuging at 120,000 g for 70 min, collecting precipitate PBS, re-suspending, and filtering to obtain the high-purity prune exosomes. It is proved for the first time that the prune exosome dose-dependently inhibits the melanin content and tyrosinase activity in B16F10 melanoma cells, the mRNA expression level of key inflammatory factors TNF-alpha, IL-1beta and IL-6 in TNF-alpha-induced Hacat cells is remarkably reduced, in addition, the inhibition effect of melanin can be amplified through an STAT3 channel by combining the prune exosome with luteolin, and the application of the prune exosome to the preparation of the anti-inflammatory drug is promoted. The polypeptide can be used for preparing a preparation for regulating pigment anabolism and skin-related inflammatory response, and a potential biological application value is exerted.

The invention relates to an interferometric pigment comprising a layer of zinc sulfide-based material. The pigment advantageously comprises a low refractive index core and at least one high refractive index layer comprising zinc sulfide. The invention also proposes a method for synthesizing these pigments by non-homogeneously precipitating zinc sulfide on a powdered support, by adding a zinc salt solution to a reaction medium containing a dispersion of the powdered support, titrating a sodium sulfide solution having a fixed pH at a moderate temperature to obtain a precipitate. The invention also relates to cosmetic compositions comprising these interference pigments free of titanium dioxide, titanium dioxide being typically introduced as a filler or by providing a cosmetic ingredient containing titanium dioxide.

The invention relates to tobacco lipoxygenase NtLOX2 capable of regulating and controlling pigment synthesis and application of the tobacco lipoxygenase NtLOX2. The amino acid sequence of the tobacco lipoxygenase NtLOX2 is shown as SEQ ID No.1. The invention provides tobacco lipoxygenase NtLOX2 which is found to be highly related to the content of tobacco pigment, and after the gene is silenced, the content of the pigment in tobacco is obviously increased.

The application discloses a preparation method of acid and alkali resistant toluidine red pigment, belongs to the technical field of pigment synthesis, and introduces di-primary amine on a modified toluidine red pigment, then reacts with a dicarboxylic compound, and finally is prepared through hydrolysis and self-assembly; the modified toluidine red pigment is prepared through the following steps that 3-amino-4-nitrobenzyl alcohol is diazotized and then coupled with 2-naphthol; the acid and alkali resistant toluidine red pigment prepared by the application not only has bright color and good hiding power, and also has high coloring strength, light resistance, water resistance, oil resistance and dispersibility, and simultaneously has strong acid and alkali resistance and environmental stability, and significantly improves the application performance of the pigment.

The invention relates to a paper for decorative coating materials, containing cellulosic fibres and synthetic fibres, the synthetic fibres containing at least one polymer and at least one pigment, and the mass ratio of pigment to polymer in the synthetic fibres being 1: 10 to 1: 1. Furthermore, the invention relates to a decorative paper or a decorative film containing the paper according to the invention, and to a method for producing the paper according to the invention, comprising the following steps: (a) providing a pulp mixture, (b) grinding the pulp mixture to a grinding degree of 10 to 45 DEG SR, (c) selectively adding a filler and a wet strength agent to the ground pulp mixture obtained in (b), (d) diluting the mixture obtained in (c), (e) selectively adding auxiliaries, (f) forming a fibrous non-woven fabric, (g) dewatering and drying the fibrous non-woven fabric to obtain the paper, in which synthetic fibers containing at least one polymer and at least one pigment are added after step (d) and before step (f), and in which the mass ratio of pigment to polymer is from 1: 10 to 1: 1.

The invention discloses a honeysuckle flower pigment synthesis gene and application thereof in regulating and controlling the content and resistance of plant anthocyanidin, and belongs to the technical field of gene engineering. The nucleotide sequence of the honeysuckle flower pigment synthesis gene is as shown in SEQ ID NO. 6. The invention provides a honeysuckle flower pigment synthesis gene. The gene has the effects of regulating and controlling the content of anthocyanidin in plants and regulating and controlling the stress resistance of the plants. The gene is introduced into a plant body by constructing an overexpression vector, so that the gene is stably overexpressed, the anthocyanidin content in the plant is remarkably increased, and the petal color and seed coat color of the plant are darkened; the resistance of the plant to drought stress and salt stress is also remarkably enhanced, so that the plant can adapt to a severe environment more easily, and a new gene resource and a theoretical support are provided for breeding of high-resistance plant varieties.

The invention relates to an interferometric pigment comprising a layer of zinc sulfide material. The pigment advantageously comprises a low refractive index core and at least one high refractive index layer comprising zinc sulfide. The invention also proposes a method for synthesizing these pigments by heterogeneously precipitating zinc sulfide on a powdered support by adding a zinc salt solution to a reaction medium containing a dispersion of the powdered support and titrating a sodium sulfide solution having a fixed pH at a moderate temperature to obtain a precipitate. The invention also relates to cosmetic compositions comprising these interference pigments free of titanium dioxide, wherein titanium dioxide is typically introduced as a filler or by providing a cosmetic ingredient containing titanium dioxide.

The invention relates to the technical field of pigment synthesis, in particular to a production process of pigment yellow 139, which comprises the following steps: 1) adding water into barbituric acid, fully dissolving at the temperature of 30-70 DEG C, adjusting the pH value to be less than or equal to 1.8 to form a supersaturated solution, keeping the temperature unchanged, adding 1, 3-diimino isoindoline solid or a mixed solution of the 1, 3-diimino isoindoline solid and the water for multiple times, and reacting the barbituric acid with the 1, 3-diimino isoindoline solid to obtain a mixture; the molar ratio of the 2, 3-diimino isoindoline to the 2, 3-diimino isoindoline is (2.5-4.5): 1, keeping the pH value of the system to be less than 7 in the adding process, and then keeping the temperature at 40-70 DEG 2) crude product separation: after the heat preservation reaction is finished, keeping the temperature of the mixed solution in the step 1) at 50 DEG C or above, and carrying out hot filtration to separate a pigment crude product; 3) pigmentation: adding water into the pigment crude product, preserving heat at 105-130 DEG C for pigmentation within 4-10 hours to obtain a pigment yellow 139 product; and 4) carrying out heating reduced pressure distillation treatment on the filtrate obtained by hot filtration separation in the step 2) to obtain a barbituric acid aqueous solution and ammonia water. The raw material utilization rate is improved.

This invention discloses a wheat blue-grain gene and its applications, belonging to the fields of plant molecular biology, biochemistry, genetics, and plant breeding. Using differential expression analysis between blue-grain and white-grain wheat, four genes controlling the blue-grain trait were identified: two MYB family transcription factors and two bHLH family transcription factors. Furthermore, plant recombinant expression vectors for these genes and a method for regulating anthocyanin synthesis in plants are provided. This has significant theoretical and practical implications for studying the aleurone layer pigment synthesis pathway in blue-grain wheat, its use as a screening marker in plant transformation processes, and improving the nutritional value of plants.

The invention relates to a preparation method of a modified acid red 289 dye for photoresist, which is mainly used in the manufacture of an optical color filter of a color liquid crystal display, and comprises the following steps: (1) pigment synthesis: dissolving acid red 289 in methanol, adding concentrated hydrochloric acid for reaction, stirring, and filtering to obtain a pigment; converting a sulfonate group in a dye molecule into a sulfonic acid group, and after the reaction is finished, filtering and drying to obtain R289-H; (3) kneading treatment: adding the R289-H obtained in the step (1), an inorganic salt, a solvent, the resin obtained in the step (2) and an auxiliary agent into a kneading machine, carrying out a kneading reaction, and after the reaction is finished, washing and drying to obtain the modified acid red 289 dye for the photoresist. According to the invention, the problem that acid red 289 is difficult to dissolve in propylene glycol methyl ether acetate is solved, and the chromaticity and contrast of the modified dye are further improved.

The application discloses a kind of acid and alkali resistant pigment red 57:1 for ink and a preparation method thereof, and belongs to the technical field of pigment synthesis, which is composed of 5~10 parts of block polymer and 70~100 parts of pigment red 57:1 by weight; The block polymer is a block polymer with a main chain containing a vinyl structural unit, a side chain with a carboxyl group / amino group and a phenyl group, and a phenyl group at the end; The acid and alkali resistant pigment red 57:1 for ink prepared by the application, while maintaining the original bright color of the pigment and the advantages of high color strength, by introducing a hydrophilic core rich in carboxyl and amino groups, and matching a hydrophobic shell, the stability of the pigment in strong acid and strong alkali environment is improved, and has a broader application prospect.

The invention discloses a red pigment, a preparation method thereof and a red pigment dispersion liquid, the preparation method comprises the following steps: (1) preparing a copper-based catalyst: carrying out partial reduction calcination treatment on Cu2O powder in a reducing atmosphere which contains H2 to obtain the copper-based catalyst rich in oxygen vacancies; (2) mixing bromamine acid or salt thereof, the copper-based catalyst prepared in the step (1) and a solvent; (3) adding acid into the mixture obtained in the step (2), and carrying out condensation reaction; and (4) after the reaction is finished, carrying out post-treatment to obtain the red pigment. Through cooperation of the copper-based catalyst rich in oxygen vacancies and the process, the comprehensive technical effects that the synthesis reaction rate of the red pigment is remarkably increased, the particle size of primary particles is reduced, the primary particles are uniformly distributed, and the contrast ratio and dispersion stability in the optical filter are comprehensively improved are achieved.

The invention relates to the technical field of pigment synthesis, and particularly discloses a 5, 5 '-dihydroxy bipyridine monoester blue pigment as well as a preparation method and application thereof. The 5, 5 '-dihydroxy bipyridine monoester blue pigment provided by the invention increases the solubility of pigment molecules in an ester-soluble solvent, also shows certain solubility in water, is expected to be used as dye molecules in the fields of printing and dyeing, spinning and the like subsequently, can also be used as an intermediate to complete synthesis of other derivatives, and has great application prospects.

The invention discloses an easily dispersible toluidine red pigment and a preparation method thereof, belonging to the technical field of pigment synthesis. The pigment comprises the following raw materials, measured in parts by weight: 1-2 parts of toluidine red and 0.3-0.5 parts of a polyamide polymer grafted with cyclodextrin; the polyamide polymer grafted with cyclodextrin is prepared by grafting cyclodextrin onto a tri-terminal carboxyl compound, performing a quaternization reaction, and finally reacting with hexamethylenediamine. The easily dispersible toluidine red pigment prepared by the invention has stable dispersibility, high tinting strength and weather resistance, and effectively improves its application effect in the fields of coatings and the like.

This invention belongs to the field of pharmaceutical technology, specifically relating to the application of XBD-173 or its pharmaceutically acceptable salts in the preparation of remedies for treating and / or preventing depigmentation diseases caused by pigment synthesis disorders, particularly in the preparation of remedies for treating and / or preventing vitiligo, leukoderma, pityriasis alba, and albinism. Experiments have shown that XBD-173 can significantly increase melanin synthesis and promote repigmentation in the dorsal lesions of vitiligo mice, while exhibiting no significant toxicity. In summary, XBD-173 has a clear mechanism of action, significant effects, and no significant side effects, demonstrating significant advantages and advancements compared to existing drugs.

The invention provides application of pyrrolimidazole in development of a CrtN enzyme inhibitor, and a CrtN enzyme activity test, a growth curve, pigment yield determination, a hydrogen peroxide killing test, a whole blood killing test and a mouse skin scald infection test prove that pyrrolimidazole can inhibit the activity of the CrtN enzyme, reduce the anti-oxidation removal capability of staphylococcus aureus and inhibit the growth of the CrtN enzyme. The protection effect of a staphylococcus aureus skin infection model is improved. Therefore, as a potential staphylococcus aureus pigment synthesis inhibitor, the depyrrolimidazole can reduce the oxidative stress resistance of staphylococcus aureus by inhibiting the activity of the CrtN enzyme, and has important significance for clinically developing safe and effective antioxidant adjuvants.

The invention belongs to the technical field of pigment synthesis, and particularly relates to a method for synthesizing a high-performance azo pigment through continuous flow, in particular to a method for synthesizing the high-performance azo pigment through a continuous flow production device. The continuous flow production device comprises three pipeline reactors which are sequentially connected in series; the method for synthesizing the high-performance azo pigment through the continuous flow comprises the following steps: S1, carrying out continuous diazotization reaction on a sodium nitrite solution and a diazo component dispersion in a first pipeline reactor; s2, carrying out continuous coupling reaction in a second pipeline reactor; and S3, pigmentation treatment is carried out in the third pipeline reactor. The pipeline reactor is used for continuous synthesis, the pigment product can be directly obtained, an intermediate product storage tank is not needed, and continuous production in the true sense is achieved; the front-section mixing device can ensure the overall mixing effect, and the particle size of the pigment is uniform; the pipeline of the delayed reaction area is enlarged, so that the unit flux is larger, the yield is higher, and the economic benefit is better.

The invention discloses a rapid screening method of a pigment high-yield strain, and belongs to the field of pigment synthesis. According to the technical scheme, the method comprises the steps that Raman spectrums of a plurality of pigment high-yield strains serve as a training set, and a deep learning model based on an out of distribution algorithm is constructed; determining the category of a sorted target pigment, after the target pigment is identified by the classification model, setting a sorting threshold value by using the intensity difference value of Raman peaks, carrying out flow type Raman detection on a mutant library to be screened, calculating the Raman spectrum characteristic peak difference value of the Raman spectrum judged as the target pigment in real time, and comparing the Raman spectrum characteristic peak difference value with the sorting threshold value. The cells with the characteristic peak difference value larger than the threshold value are sorted and collected. The method is applied to rapid screening of the high-yield pigment strains, solves the problems of low screening efficiency and poor screening precision of the existing high-yield pigment strain screening technology, and has the characteristics of high throughput and high screening precision.

The invention relates to the technical field of biological environment engineering, and provides a fucoxanthin synthesis optimization method and system based on reinforcement learning, and the method comprises the following steps: a real-time data acquisition system; constructing a state space; a deep reinforcement learning decision network; optimizing a dynamic strategy; and strategy verification is linked with the process. Through a light quality-stimulant collaborative reinforcement learning regulation strategy, the static operation limitation of a traditional process is broken through, the photosynthetic physiological state of microalgae is perceived in real time, the light environment and chemical signals are dynamically optimized, the fucoxanthin synthesis efficiency is remarkably improved, and a multi-omics closed-loop verification mechanism is combined, so that the fucoxanthin synthesis efficiency is improved. The molecular cascade effect of a light signal driving pigment synthesis pathway is illuminated, and a precise target spot is provided for metabolic engineering transformation.

The invention discloses a heat exchange device for organic pigment synthesis, a heat exchange assembly is arranged in a heat exchange container, the heat exchange assembly comprises a bottom heat exchange pipe and a top heat exchange pipe, and the bottom heat exchange pipe comprises a plurality of arc-shaped pipes and rotary connecting pieces communicated between every two adjacent arc-shaped pipes. The invention relates to the technical field of organic pigment preparation, a double-layer structure of a bottom heat exchange tube and a top heat exchange tube is adopted, and the bottom heat exchange tube and the top heat exchange tube are connected into a three-dimensional structure through a connecting pipeline to be arranged in a heat exchange container. When a reactant is stirred to move, the top heat exchange pipe can continuously retract and expand through the movable coil pipe, so that the top heat exchange pipe can conduct heat exchange on the inner side and the outer side of the top of the reactant, and the top heat exchange pipe makes contact with the reactant under dynamic movement to conduct heat exchange. And compared with a traditional fixed heat exchange mode, flowing of reactants can be better conformed, the temperature requirements of the reactants at different positions are actively met, and the overall heat exchange effect is further improved.

The present application relates to a kind of wide-band high reflectivity anhydrous xanthine film and its preparation method and application, belong to the field of pearlescent pigment, high reflection crystal material and new functional material, high polymer regulation xanthine-based pearlescent pigment synthesis method.Utilize ammonia volatilization method in aqueous solution to prepare xanthine-based pearlescent pigment, obtain the dispersion of xanthine nanosheet, and then obtain xanthine nanosheet, make xanthine nanosheet into xanthine film material, and then obtain wide-band high reflectivity anhydrous xanthine film.

The invention discloses a green synthesis process of a high-dispersity orange pigment, which comprises the following steps: simultaneously condensing and complexing 5, 6-diaminobenzimidazolone, 2-hydroxy-1-naphthaldehyde and nickel chloride in an acetic acid aqueous solution to obtain pigment slurry, and grinding, pigmenting and post-treating the pigment slurry to obtain the high-dispersity orange pigment. The pigment is synthesized through a single organic solvent one-step method, and the dispersing performance of the pigment is remarkably improved.

The invention discloses a method for synthesizing theaflavin by taking lotus root as a raw material, which belongs to the field of natural product pigment synthesis and comprises the following steps: raw material collection, slicing, browning reaction, vacuum drying and theaflavin extraction and purification. The lotus root theaflavin extract prepared in a browning mode has a remarkable, mild and lasting coloring effect on hair, especially white hair, and can cover a wide range of color systems including but not limited to various natural hair colors such as light brown, chestnut color, brown color and dark brown. The method for synthesizing the theaflavin by taking the lotus root as the raw material is expected to break through the dependence on tea leaves or expensive monomers, and opens up a new way for large-scale and commercial production of the theaflavin.

The xanthoquinodine production method includes culturing a filamentous fungus in culture medium to produce and accumulate xanthoquinodines in the culture medium and / or cells and recovering xanthoquinodines from the culture medium and / or cells. During culture, melanin synthesis is suppressed by the filamentous fungus.

The invention discloses a preparation method of an organic pigment for a coating based on golden light red, and belongs to the technical field of pigment synthesis, the preparation method comprises the following steps: diazotizing 2-amino-5-chloro-4-toluene sulfonic acid, coupling with an olefin-terminated modified silicon dioxide-naphthol derivative, adding a barium chloride aqueous solution, and carrying out color lake to obtain an alkenyl-terminated modified golden light red pigment; and finally, reacting with polyvinyl acetate to obtain the product. According to the preparation method disclosed by the invention, the dispersion stability, the moisture resistance, the migration resistance and the solvent resistance of the pigment are remarkably improved, and the application performance of the pigment in the aspect of coatings is enhanced.

The invention discloses a preparation method of an acid and alkali resistant toluidine red pigment, and belongs to the technical field of pigment synthesis, diprimary amine is introduced to a modified toluidine red pigment, then the modified toluidine red pigment reacts with a dicarboxylic acid compound, and finally the acid and alkali resistant toluidine red pigment is prepared through hydrolysis and self-assembly. The modified toluidine red pigment is prepared by diazotizing 3-amino-4-nitrobenzyl alcohol and then coupling the diazotized 3-amino-4-nitrobenzyl alcohol with 2-naphthol; the acid and alkali resistant toluidine red pigment prepared by the invention not only has bright color, good covering power, higher coloring strength, light resistance, water resistance, oil resistance and dispersity, but also has higher acid and alkali resistance and environmental stability, and the application performance of the pigment is remarkably improved.

The invention discloses an environment-friendly colorful pearlescent pigment and a preparation method thereof, and belongs to the technical field of pigment synthesis. According to the pigment, a new aliphatic amine structure-directing agent is introduced into a base material and a solvent and mixed to prepare slurry, the slurry is placed in a multi-frequency ultrasonic reaction device, and an organic titanium source is added into the slurry for reaction. The organic titanium source replaces titanium tetrachloride, so that the hydrolysis loss of the titanium source can be effectively reduced, the structure-directing agent can effectively reduce the interface free energy of a reaction system, and a tighter and smoother titanium dioxide film is formed, so that high color saturation is realized. The mass and heat transfer efficiency of the reaction is enhanced by the multi-frequency ultrasonic reactor, so that the collision frequency among monomer molecules is increased, and the reaction rate is greatly improved. Compared with a traditional method, the method has the advantages that a buffer solution does not need to be continuously used for adjusting the reaction pH value in the reaction process, the operation is safe and simple, organic solvents such as methanol and ethanol can be recycled after the reaction is finished, no waste water or waste salt is discharged, and the purposes of environmental protection, energy conservation and consumption reduction are really achieved.

The invention discloses a method for preparing an organic pigment for coatings based on jinguanghong, belonging to the technical field of pigment synthesis. The method comprises the following steps: firstly, 2-amino-5-chloro-4-methylbenzenesulfonic acid is diazotized, and then coupled with a terminal olefin-modified silica-naphthol derivative, and then a barium chloride aqueous solution is added for lake formation to obtain a terminal olefin-modified jinguanghong pigment, and finally the pigment is reacted with polyvinyl acetate to obtain the jinguanghong pigment. The preparation method of the invention significantly improves the dispersion stability, moisture resistance, migration resistance and solvent resistance of the pigment, and enhances its application performance in coatings.