81 results about "Dibenzoyl methane" patented technology

The invention relates to a blue-light-resistant and anti-ultraviolet cosmetic raw material, a preparation method thereof and an application of the raw material. The cosmetic raw material comprises Arabian jasmine flower extracts, pale butterflybush flower extracts, bisabolol, glycerin, water, propylene glycol, titanium dioxide, cyclopentasiloxane, isohexadecane, polydimethylsiloxane, petrolatum, 1, 2-hexanediol, butyl methoxy dibenzoyl methane, Xanthan gum and the like. Plants containing natural active components are extracted to form an all-optical protection cosmetic, the cosmetic contains various nourishing components, is lightsome, breathable, fine, smooth, textured, soft, moist and nourished, can form a clear isolated layer on the surface of a skin and has excellent functions of resisting blue light, ultraviolet ray and oxidation and the like, interference of dust, haze, make-up products and the like to the skin is avoided, delicate skins are protected moment by moment, and all-weather protection is provided for the skin. The all-optical protection cosmetic is remarkable in effect, good in stability, convenient to use and high in universality and has wide application values.

A cosmetic composition is provided comprising a Gingko biloba extract, an alkyl beta,beta-diphenylacrylate and / or alpha-cyano beta,beta-diphenylacrylate derivative, and a dibenzoyl methane derivative. A cosmetic use of that composition is also provided for preventing sun damage and photo ageing.

The invention relates to a novel method for efficiently synthesizing dibenzoylmethane. The product (dibenzoylmethane) is non-toxic, tasteless and widely used in PVC (polyvinyl chloride) plastics and ABS (acrylonitrile butadiene styrene) resins. The invention belongs to preparation of compounds containing C0 groups and only connecting carbon or hydrogen atoms, in particular relates to preparation of beta-dione. The method is characterized in that the dibenzoylmethane is prepared from methyl benzoate and acetophenone through a condensation reaction in an alkaline environment. The methyl benzoateis prepared from benzoic acid and methanol as raw materials and sulfuric acid as a catalyst through an esterification reaction. The main raw material, namely the methyl benzoate, of the target product, namely dibenzoylmethane, of the method, is prepared through a self-designed process, a catalyst, namely sodium methoxide, of the condensation reaction, is prepared according to the self-designed process, and technological conditions of the key steps of the condensation reaction for synthesizing the dibenzoylmethane are optimized. The invention provides the method for preparing the dibenzoylmethane with low raw material cost, a short condensation reaction period, few by-products, a high yield of dibenzoylmethane, complete solvent recovery and an excellent capability for improving photothermal stability of a thermoplastic resin. The condensation yield is 85%, and the crystallization yield is 95%.

The invention discloses a D-A-D cyclometalated iridium complex near-infrared luminous material based on aryl quinoxaline. The near-infrared cyclometalated iridium (III) complex comprises a D-A-D C^N cyclometalated ligand taking aryl quinoxaline as an electron acceptor (A) unit and an electron-rich substituent group as an electron donor (D) unit, and an acetylacetone, dibenzoyl methane and pyridinecarboxylic acid auxiliary ligand. The material can emit strong near-infrared light with luminous wavelength greater than 700nm and is high in fluorescence quantum efficiency; an aggregation state isadjustable; the highest external quantum efficiency of a doped polymer electroluminescent device reaches 6.2%; and the highest irradiance of the device is 1416 microwatts / Sr / cm<2>.

The invention discloses a stabilizer for PVC sheets and a preparation method thereof. The stabilizer for PVC sheets is prepared from the following raw materials by weight: 1-10 parts of a main stabilizer A, 10-15 parts of a main stabilizer B, 35-55 parts of an auxiliary stabilizer C, 1-10 parts of an auxiliary stabilizer D, 5-10 parts of an antioxidant, 3-15 parts of a lubricant, 1-15 parts of a chelating agent, and 1-5 parts of an impact resistant agent. Specifically, the main stabilizer A is at least one of calcium stearate, strontium stearate and calcium benzoate; the main stabilizer B is at least one of zinc stearate, lanthanum stearate and zinc benzoate; the auxiliary stabilizer C is at least one of magnesium-aluminum hydrotalcite and magnesium-aluminum-zinc hydrotalcite; and the auxiliary stabilizer D is at least one of dibenzoyl methane, stearoyl benzoyl methane and dodecyl dihydropyridine diformate. The stabilizer prepared according to the invention has the advantages of no toxicity, environmental protection, no odor, fast plasticization, high product transparency, good weather resistance and good ultraviolet aging resistance.

The invention relates to sunscreen spray which comprises, in weight percent, 1-9.5% of titanium dioxide, 2-10% of octyl methoxycinnamate, 0.5-7.5% of methylene dibenzo-triazolyl tetramethyl butylphenol and 0.1-5% of butyl methoxyl dibenzoyl methane. Physical sunscreen agents (the titanium dioxide) and chemical sunscreen agents (the octyl methoxycinnamate, the methylene dibenzo-triazolyl tetramethyl butylphenol and the butyl methoxyl dibenzoyl methane) are compounded to prepare the sunscreen spray, so that the sunscreen spray has good skin feelings and sunscreen effects.

The invention discloses an isolated sunscreen composition which comprises an ultraviolet light absorbent, an antioxidant and a calming and soothing agent, wherein the ultraviolet light absorbent comprises one or more of a white tea extract, ultra-fine nanometer titanium dioxide, nanometer zinc oxide, ethylhexyl salicylate, butyl methoxy dibenzoyl methane and rutin. The isolated sunscreen composition disclosed by the invention has the beneficial effects that the ultraviolet light absorbent added in the isolated sunscreen composition can absorb ultraviolet light and reduce the damage caused by the ultraviolet light to skin; the antioxidant added can remove free radicals and reduce the oxidative damage; the calming and soothing agent added can clam and sooth the skin and strengthen the ability to protect against ultraviolet radiation; by cooperated use of all the components, the isolated sunscreen composition can realize a good isolated sunscreen effect and give cosmetics a significant isolated sunscreen effect when being applied to the cosmetics, so that the skin is better protected.

The invention discloses a synthetic method of DBM-S (Dibenzoyl Methane-S). The raw materials comprise the following components: xylene, CaCl2, sodium methylate, methyl benzoate and acetophenone in a weight ratio of (220-300) to (28-32) to (20-23) to (54.4-63.1) to 40. The DBM-S is prepared by the following steps: first, injecting xylene in proportion into a container; adding CaCl2 while stirring; then, heating to 135 DEG C to evaporate water; then, cooling to 70 DEG C and adding sodium methylate; after uniformly stirring, heating to 135 DEG C; adding methyl benzoate; after addition, heating to 135 DEG C; dropwise adding acetophenone for 4 hours at constant temperature; after dropwise addition, preserving heat for 1 hours; and carrying out suction filtration, water washing and suction filtration again and drying to obtain a product DBM-S. The synthetic method disclosed by the invention realizes one-step synthesis, so that the conversion ratio reaches up to 86.2%, the synthetic time and steps are shortened and the production cost is lowered, and the synthetic method has remarkable technical and economic advantages.

The invention relates to a method for purifying by-product sodium chloride in dibenzoyl methane production. The method includes steps of, step one, using the by-product sodium chloride in the dibenzoyl methane production as a raw material, and calcining the by-product sodium chloride in a tunnel kiln at the temperature of 450-500 DEG C for 20-30 minutes; step two, placing solids obtained from the calcination into water for dissolving to obtain a solution, keeping the temperature of the solution to be 60-80 DEG C, standing the solution until calcined residues in the solution are precipitated and black particles float on the solution surface, separating lower layer precipitate and the black particles floating on the solution surface, and taking a clear liquor; step three, concentrating and steaming the clear liquor, and then performing cooling and crystallizing; and step four, performing centrifugal filtration to obtain crystal particles, and drying the crystal particles to obtain the finished sodium chloride.

The present invention discloses one kind of organic rare earth (RE) compound fluorescent material and its preparation and application. The present invention selects organic methyl trialiphatic amide chloride and beta diketo dibenzoyl methane as ligand and makes the organic RE compound has a diketone content lower than 40%. By means of common organic synthesis process, organic RE fluorescent compound with high efficiency, high brightness, high stability and long service life and to luminance with red light is obtained. The solid power of the present invention may be added into solid or flowingmaterial to act as display or special mark material.