154 results about "Radical trapping" patented technology

These and other objects of this invention are achieved by providing a novel method and compositions for the clinical treatment of chronic inflammatory diseases. This invention involves use of systemically administered compositions which include primary amine derivatives of benzoic acid as carbonyl trapping agents. These primary therapeutic agents act by chemically binding to and sequestering the aldehyde and/or ketone products of lipid peroxidation. Increased levels of lipid peroxidation have been repeatedly demonstrated as a part of the non-enzymatic "inflammatory cascade" process which underlies the secondary etiology of chronic inflammatory diseases. p-Aminobenzoic acid (or PABA) is an example of the primary therapeutic agent of the present invention. PABA has a small molecular weight, is water soluble, has a primary amine group that reacts with carbonyl-containing metabolites under physiological conditions and is tolerated by the body in relatively high dosages and for extended periods. The carbonyl sequestering agents are used in combination with at least one co-agent so as to produce an additional beneficial physiological effect of an anti-inflammatory nature. Such compositions are administered systemically entirely via the oral route. Co-agents of the present invention include anti-oxidants and free radical trapping compounds (e.g., alpha-tocopherol), compounds having indirect anti-oxidant activity (e.g., selenium), vitamins (e.g., pyridoxine HCl), compounds which facilitate kidney drug elimination (e.g., glycine), metabolites at risk of depletion (e.g., pantothenic acid), sulfhydryl containing chemicals (e.g., methionine), compounds which facilitate glutathione activity (e.g., N-acetylcysteine), and non-absorbable polyamine co-agents (e.g., chitosan).

The present invention concerns a composition for retarding skin aging which contains an edible herb medicine or medicines round in Taiwan, in particular a plant extract or extracts having melanine formation-unhibiting, elastase-inhibiting, hyaluronidase-inhibiting, active oxygen-eliminating and/or radical-capturing type antioxidant activities, and a medicinally acceptable base and/or additives for external dermal application. The composition is useful in promoting skin whitening effects, maintaining the tension and elasticity of the skin, facilitating skin moistening and providing the skin with anti-inflammatory and/or anti-allergic properties.

A method of attaching one or more organic groups onto a particle is described which involves reacting at least one radical with at least one particle wherein the radical is generated from the interaction of at least one transition metal compound with at least one organo-halide compound in the presence of one or more particles capable of radical capture. Variations of this method are also described.

A process for obtaining the apolar extract comprises: (a) extracting the rhizomes with an organic solvent; (b) filtration and evaporation to dryness of the extract; (c) dissolution of the oleoresin obtained in hot conditions, precipitation while allowing to cool down and filtration of the solid; (d) drying and recrystallizing the solid in order to obtain a product having a purity in curcuminoids higher than 90%. Obtaining the polar extract comprises: (a') extraction of the rhizomes with water at 50-70° C. and (b') filtration and evaporation of the water. Application of the compositions and preparations as catchers of free radicals and antiageing agents, as well as reducing agents to reduce the plasma levels of lipid peroxides in human beings are disclosed.

The invention relates to a one-component silicyl polyether sealing adhesive and a preparation method thereof, belonging to the technical field of one-component silicyl polyether sealing adhesive; the one-component silicyl polyether sealing adhesive mainly solves the problems that the existing silicyl-terminated polyether sealing adhesive has low tensile strength, and the tensile strength is only 0.5-3.5MPa and affects the application range; the one-component silicyl polyether sealing adhesive comprises the following ingredients: 20-40 parts of silicyl-terminated polyether, 5-20 parts of plasticizers, 30-50 parts of incremental fillers, 4-10 parts of reinforcing fillers, 0-20 parts of coloring agents, 0.1-5 parts of thixotropic agent, 0.01-1 part of ultraviolet absorber, 0.01-1 part of radical scavenger, 0.1-3 parts of moisture content scavenger, 0.1-5 parts of adhering accelerator and 0.1-3 parts of catalysts; the one-component silicyl polyether sealing adhesive has high tensile strength, the tensile strength can reach 5.12MPa, and the one-component silicyl polyether sealing adhesive is used for sealing adhesive of various materials and splicing, thereby having wide application on automobile making industry, railway transportation industry, container manufacturing industry, metal and nonmetallic processing industry, equipment manufacturing, air conditioner and ventilator devices.

The present invention provides a chemical-mechanical polishing (CMP) composition comprising an amino compound, a radical-forming oxidizing agent, a radical trapping agent capable of inhibiting radical-induced oxidation of the amino compound, and an aqueous carrier therefore. The radical trapping agent is a hydroxyl-substituted polyunsaturated cyclic compound, a nitrogenous compound, or a combination thereof. Optionally, the composition comprises a metal oxide abrasive (e.g., silica, alumina, titania, ceria, zirconia, or a combination of two or more of the foregoing abrasives). The invention further provides a method of chemically-mechanically polishing a substrate with the CMP compositions, as well as a method of enhancing the shelf-life of CMP compositions containing an amine and a radical-forming oxidizing agent, in which a radical trapping agent is added to the CMP composition.

The invention discloses a PE wood/plastic composite sectional material and relates to the technical field of composite materials. The PE wood/plastic composite sectional material is made from the following raw materials in parts by weight: 10-70 parts of wood flour, 20-50 parts of polyethylene, 3-20 parts of calcium carbonate powder or talc powder, 0.1-1 part of stearic acid or n-butyl stearate, 0.4-1.5 parts of one or a combination of more than one of calcium stearate, lead stearate, barium stearate, cadmium stearate, lanthanum stearate, zinc stearate, PE wax, or oxidized polyethylene wax OPE or 0.1-1.5 parts of paraffin, 0.5-3 parts of a coupling agent, 0.5-2 parts of an antioxidant, 0.05-2 parts of a UV absorbent, a light shielding agent, quencher or free radical scavenger, and 3-12 parts of titanium pigment. The PE wood/plastic composite sectional material provided by the invention has the advantages of water resistance, insect resistance, rust corrosion resistance, convenience for fabrication, safety in use, strong plasticity, energy conservation, environmental friendliness and no formaldehyde, benzene or other poisonous substances.

There is provided a thermoplastic resin foam being excellent in strength, flexibility, cushioning properties, strain recovery and the like, particularly being low in the shrinkage of the cell structure due to the resilience of the resin, and being good in productivity. There is also provided a process for producing a thermoplastic resin foam which can produce, with good productivity, the thermoplastic resin foam being excellent in strength, flexibility, cushioning properties, strain recovery and the like, particularly being low in the shrinkage of the cell structure due to the resilience of the resin. The thermoplastic resin foam according to the present invention is obtained from a thermoplastic resin composition containing a thermoplastic elastomer, an active energy-ray curable compound and a radical trapping agent. The thermoplastic resin foam according to the present invention is also obtained from a thermoplastic resin composition containing a thermoplastic elastomer, an active energy-ray curable compound, a thermal crosslinking agent and a radical trapping agent.

This invention relates to the use of chemical compounds to trap carbon-centered radicals during the golf ball curing process. The intended end result is a golf ball that has lower compression due to a decrease in crosslink density while retaining sufficient crosslink density to impart durability to the golf ball and either maintain or increase the resiliency of the golf ball. The subject invention more specifically discloses a golf ball which is comprised of a solid core and a resin cover wherein the core is produced by curing a composition comprising an elastomeric polymer, a free radical initiator, a radical crosslinking agent, and at least one carbon-centered radical trap, wherein the carbon-centered radical trap is free of sulfur, and wherein the carbon-centered radical trap is not a stable free radical. The present invention further discloses a process for manufacturing a golf ball core which comprises (1) blending a mixture of an elastomeric polymer, a free radical initiator, a radical crosslinking agent, and at least one carbon-centered radical trap to produce a golf ball core composition, wherein the carbon-centered radical trap is free of sulfur, and wherein the carbon-centered radical trap is not a stable free radical, (2) compressing the golf ball core composition into an essentially spherical shape to produce an uncured golf ball core and (3) heating the uncured golf ball cure at an elevated temperature to produce a cured golf ball core.

The invention discloses a weather-resistant low-gloss high-fluidity polycarbonate composition, which consists of a main material and an aid, wherein the main material comprises the following components in percentage by weight: 40 to 80 percent of polycarbonate (PC), 10 to 55 percent of styrene base resin, 0 to 4 percent of ethylene-acrylic ester polymer elastomer, 1 to 3 percent of delustering agent and 0 to 3 percent of thermoplastic polyester; and the aid consists of an ultraviolet absorber, a radical scavenger and other aids, wherein the ultraviolet absorber is 0.1 to 1 percent of the total weight of the main material, the radical scavenger is 0.1 to 0.5 percent of the total weight of the main material, and the other aids are 0 to 3 percent of the total weight of the main material. The product has excellent weather resistance, lower gloss and high fluidity, keeps excellent mechanical properties and processability, and can be used for various automotive interior trims.

The current invention provides methods and compositions for treating sensorineural hearing loss including but not limited to acute acoustic trauma (AAT). The composition includes compounds which function as free radical traps such as phenyl butyl nitrone (PBN), free radical scavengers, such as edaravone, resveratrol, ebselen and iron chelator and compounds from the family of antioxidant compounds including, but not limited to, N-acetylcysteine (NAC), Acetyl-L-Carnitine (ALCAR), glutathione monoethylester, ebselen, D-methionine and carbamathione. The compositions of the current invention may be delivered by injections or orally.

The present invention involves the use of nitrone free radical trapping agents in the treatment and prevention of gliomas. The agents may be used alone or combined with other traditional chemo- and radiotherapies and surgery, to treat or prevent glioma occurrence, recurrence, spread, growth, metastasis, or vascularization.

The invention discloses a surface self-assembly gold nanoprobe with the free radical capture performance and a preparing method and the application thereof. The surface self-assembly gold nanoprobe with the high free radical capture performance is prepared by the following steps: the surface of a gold nano-particle is connected with nitrone free radical probe ligand with the structure of formula II by a connexon of the structure of formula I. The nitrone free radical probe ligand is connected with R3 radical group end. The gold nano-particle is connected with sulfhydryl end of the connexon. In formula Ia and formula Ib, R3 is -OH, -NH2 or -COOH, n is equal to 2-11, and n1 is equal to 1-4. In formula IIc, R1 is -P(O)(OC2H5)2, and R2 is OH, COOH or CH2OH. The surface self-assembly gold nanoprobe with the high free radical capture performance can capture free radicals under low concentration and can be applied as an antioxidant.

The invention discloses a solar battery encapsulation adhesive film which comprises the following raw materials in parts by weight: 100 parts of ethylene-vinyl acetate polymer, 0.1-5 parts of organic peroxide, 0.05-10 parts of ultraviolet absorber, 0.05-5 parts of light stabilizer, 0.01-10 parts of antioxidant and 0.01-10 parts of carbon free radical scavenger, wherein the content of vinyl acetate polymer in the ethylene-vinyl acetate polymer is 25-35%; and the carbon free radical scavenger is mixture of one or more than two of benzofuranone, hydroxylamine, tertiary amine, bisphenolmonoacryate. In the invention, harmful alkyl free radicals (R.) generated by the adhesive film in thin oxygen or anaerobic state can be scavenged effectively, so that the properties of heat and humidity resisting, ultraviolet ray resisting, high/low temperature resisting, humidity-freeze resisting the like of the adhesive film are improved, the ageing and xanthochromia indexes are effectively reduced, higher light transmittance of the adhesive film is ensured, and the high efficiency of photoelectric conversion efficiency of solar batteries is ensured.

The invention provides a preparation method of an emulsion antioxidant product and belongs to the technical field of preparation of synthetic material antioxidant products. The emulsion antioxidant product is used for acrylonitrile butadiene styrene acrylonitrile butadiene styrene (ABS) grafting powder by means of an emulsion polymerization technology. Phenolic antioxygen Wingstay-L, an active ion radical trapping agent and a methylene di-sulfo ester compound are compounded according to the proportion to form a complex antioxidant, the complex antioxidant, isotridecyl alcohol polyoxyethylene ether or nonyl phenol polyoxyethylene ether and a dilution dispersing agent are mixed and stirred through a high speed shearing machine at the heating condition of 80-120 DEG C to form a homogeneous mixed liquid, and quantitative deionized water and an anionic surface active agent are added to continue to perform high speed shearing and stirring so as to obtain the antioxidant product having a water-soluble particle emulsion state, namely the emulsion antioxidant product.

The invention provides a coloring photosensitive composition, a color filter using the coloring photosensitive composition, and a liquid crystal display device provided with the color filter, the coloring photosensitive composition comprises (A) a colorant provided with a phthalocyanine frame, (B) a solvent, (C) a polymerizable monomer, (D) an adhesive resin, (E) a photopolymerizable initiator, and (F) a polymerizable compound.

The invention discloses a coloring agent for a wear-resistant floor, and a preparation method thereof. The coloring agent for the wear-resistant floor is composed by mixing the following e components according to a normal method, by weight, 2-20 parts of nanometer color paste, 80-96 parts of a solvent and 2-6 parts of a light stabilizer, wherein the solvent is one or a mixture of ethanol, isopropanol, cyclohexanone, methyl ethyl ketone, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol diacetate, ethyl acetate, dimethylbenzene and methylbenzene; and the light stabilizer is one or a mixture of a light screener, a ultraviolet ray absorber, a quencher and a radical scavenger. The coloring agent for the wear-resistant floor can penetrate in the wear-resistant floor, is rich is color, has firm color, can bear multiple grind, is not obvious in fade after being grinded; and has relatively good endurance.

A special modified material for polyethylene film selecting polyethylene regenerative material as main raw material is prepared by the following charge ratio of raw materials and method: mixing the polyethylene regenerative resin and the dicumyl peroxide, then adding them into bucket of reactive twin-screw set, warming to make molten materials perform chain initiation in charging barrel; adding vinylsilane in the fourth barrel of the charging barrel of the set; adding free radical capture agent and quenching agent to react in the sixth barrel of the charging barrel of the set; after finishing the reaction, the materials going through the shunt board and the screen, squeezed by the die then stayed to stuff; inputting the stuff into dicing cutter to pellet after introduced into bosh to cool. The invention can reduce the cost of the raw materials for film production by 300-500 RMB/ton; can advance the reclamation of waste and old plastics, slow down the while contamination of various plastic products to environment and alleviate the market contradictory problem that the demand for polyvinyl resin exceeds the supply in recent years.

The present invention relates to a radiation sensitive resin composition comprising [A] an alkali-soluble resin, [B] a 1,2-quinonediazide compound and [C] a radical trapping agent.

The radiation sensitive resin composition can provide an interlayer insulating film which satisfies general requirements for an interlayer insulating film such as high light transmittance and has excellent heat-resistant dimensional stability, heat discoloration resistance and adhesion to a substrate along with the improvement of process efficiency for improving product yield at a high resolution and has excellent storage stability.

The invention relates to surface modified nano silicon oxide and a surface modifying method thereof. The surface modified nano silicon oxide is prepared by carrying out surface modification to nano SiO2 with a coupling agent and a radical scavenger in the presence of a solvent. The used radical scavenger is one or more of azobicyano compound, inorganic peroxide compound, organic peroxide compound, stable free radical, thiol, thiol ester, benzoquinone, phenol, aryl amine, dialkyl dithioxanthate and tetra-alkyl dithioxanthicamide compound; and the using amount of the radical scavenger accounts for 0.01 to 50 percent by weight of the nano SiO2. Oxygen radical and hydroxyl radical on the surface of the nano SiO2 are eliminated or reduced by using the radical scavenger so as to improve the prior art.

A composition comprises components for relieving nerves, a diluent, a radical scavenger and a surface active agent, wherein the mass ratio of the components for relieving nerves, the diluent, the radical scavenger and the surface active agent is (0.1-10):(50-90):(1-10):(1-20). The invention further provides a tissue employing the composition. The composition provided by the invention can effectively play the efficacy of relieving nerves, eliminating fatigue and delighting people's mood. The tissue provided by the invention can be carried about, is convenient to use, can restrain anxiety information from entering into speech-center by wiping frequently under the condition of being unconsciously influenced, can relieve nerves, reduce the degree of anxiety, eliminate fatigue, delight people's mood and can well improve the sleep quality.

The invention provides a supramolecular intercalated structure light stabilizer and a preparation method thereof. An ultraviolet absorber and a radical scavenger are innovatively commonly assembled into LDHs interlayer, the ultraviolet absorption property of the ultraviolet absorber is used to block the photodegradation of plastics by ultraviolet rays, and the radical scavenger is sued to captureactive radicals generated by the photodegradation in order to reduce the photooxidation of the plastics. The ultraviolet absorber at the LDHs interlayer and the radical scavenger have synergistic anti-light and anti-ageing effects, and the anti-light and anti-ageing performances of ultraviolet absorber and radical scavenger co-intercalated LDHs are obviously better than those of ultraviolet absorber single-intercalated LDHs, so the disadvantage of poor anti-light and anti-ageing effects of the existing ultraviolet absorber single-intercalated LDHs is overcome. The preparation method has the advantages of simplicity, abundant sources of raw materials, and convenience in industrial production. The prepared supramolecular intercalated structure light stabilizer has the advantages of high heatresistance, good migration resistance, excellent light protection performance and the like, and can be widely applied to the fields of plastics and coatings.

The purpose of the present invention is to provide a photosensitive resin composition which has a good balance between elastic modulus recovery and adhesion and is capable of forming a fine spacer. The photosensitive resin composition of the present invention is an alkali-developable photosensitive resin composition which is characterized by containing, as essential ingredients, (A) a hydrophilic resin, (B) a multifunctional (meth)acrylate, (C) a radical trapping agent, (D) a photopolymerization initiator and (E) a metal element-containing compound. The alkali-developable photosensitive resin composition is also characterized in that the energy difference between the lowest unoccupied molecular orbital of the component (C) and the highest occupied molecular orbital of the component (D) is 11.5 eV or less.