606 results about "Free-radical reaction" patented technology

Two or more plasma chambers are provided in a radical reactor to generate radicals of gases under different conditions for use in atomic layer deposition (ALD) process. The radical reactor has a body with multiple channels and corresponding process chambers. Each plasma chamber is surrounded by an outer electrode and has an inner electrode extending through the chamber. When voltage is applied across the outer electrode and the inner electrode with gas present in the plasma chamber, radicals of the gas is generated in the plasma chamber. The radicals generated in the plasma chamber are then injected into a mixing chamber for mixing with radicals of another gas from another plasma chamber, and injected onto the substrate. By providing two or more plasma chambers, different radicals of gases can be generated within the same radical reactor, which obviates the need for separate radical generators.

Disclosed is a novel method for treatment of wastewater containing organic contaminant materials by oxidatively decomposing the contaminant materials by a radical reaction involving hydroxyl radicals. The method comprises passing the wastewater through a wastewater treatment conduit (6) comprising a straightly tubular member (6) and a radical generating part consisting of a truncated pyramidal or conical tubular member (1) having an inner surface layer of titanium dioxide to serve as a positive electrode and connected to the upstream end of the straightly tubular member and a negative electrode rod (4) coaxially held relative to the truncated tubular member and applying a pulsed DC voltage having a rectangular wave form at a specified frequency. The efficiency of wastewater treatment can be improved by providing an ultrasonic part consisting of a truncated tubular member similar (7) to the above and connected to the downstream end of the straightly tubular member and an ultrasonic vibrator (8) mounted thereon to emit pulsed ultrasonic waves.

Decellularization of tissue by means of an amphipathic solvent a well-established practice. However, situations exist where the provision of enhanced decellularization is preferred. There is a demand for treating methods for coping with such situations. Thus, it is intended to provide a method for enhancing decellularization. The method comprises not only the immersing of a tissue in a solution containing an amphiphilic molecule in non-micellar form (for example, 1,2-epoxide polymer) but also performing a radical reaction (for example, treatment selected from the group consisting of exposure to gamma-ray irradiation, ultraviolet irradiation, a free radical supply source, ultrasonication, electron beam irradiation, and X-ray irradiation).

A functional polymer having active and stable functional groups useful for separation or reactive processes in chemical manufacture or analysis is disclosed. The polymer comprises repeat units having structures corresponding to cycloaddition products of polymeric 1-(vinylphenyl)ethylene with electron-poor alkenes. A process for preparing the functional polymer does not require radical reactions or the exclusion of oxygen. The properties of the polymeric matrix produced can be adjusted by modifying the polymer. For example, the polymer particle size and shape, porosity, swellability, surface area, and number, type and distribution of functional groups may be controlled.

The invention relates to a preparation method of a fire retardant, in particular to a dialkyl metal phosphinate and a synthesis process of a fire retardant thereof. The dialkyl metal phosphinate has a structural formula described in the specification, wherein R1 represents alkyl, M represents metal ions, n represents an integer from 1 to 3, and R2 represents olefin of aliphatic series. The preparation method comprises the steps of: reacting alkylphosphonous dichloride with alcohol to obtain monoalkyl phosphate; carrying out radical reaction on the monoalkyl phosphate with olefin to obtain dialkyl ester phosphinate; and reacting the dialkyl ester phosphinate with lewis acid to obtain the dialkyl metal phosphinate fire retardant. The invention has mild reaction condition; the prepared product has good thermal stability and high yield, wherein the yield can reach 87.6 percent by the count of methyl butyl ester phosphate; and the preparation method is suitable for industrialized production.

A process including: forming a first mixture of a first fluoroelastomer, and a first polymeric siloxane containing free radical reactive functional groups; and forming a second mixture of the resulting product with a mixture of a second fluoroelastomer and a second polysiloxane compound, and wherein the resulting product of the dissimilar polymeric materials is a phase compatible blend. The phase compatible blend is useful as a component of electrostatographic and liquid ink printing machines, including long-life fuser rolls, backing rolls, transfer and transfuse belts and rolls and bias charging and bias transfer rolls.

Derivatives useful in the protection of living organisms against damage due to free radical reactions derived from methoxypolyethylene glycols (MPEG), which are modified by chemically attaching chelating groups in an amide or amine linkage to the nonmethyl end of the polymer. Such chelating groups include ethylene-diamine tetraacetic acid (EDTA), diethylene triamine pentaacetic acid (DTPA), and ethylene glycol aminoethyl ether tetraacetic acid (EGTA), and pharmacologically acceptable salts or esters thereof.

The invention discloses application of dihydromyricetin in preparing a medicine for preventing and treating untoward reactions in radiotherapy and chemotherapy of tumor. In particular, the application is to prepare medicines for preventing and treating untoward reactions in radiotherapy and chemotherapy of tumor, preventing and treating arrest of bone marrow and baldness, resisting mutation, preventing and treating the generation of secondary tumors, preventing and treating tumor transfer, and preventing and treating breast cancer, cervical carcinoma, intestinal cancer and the like. The invention creatively finds that the dihydromyricetin has the effects of removing free radicals, inhibiting reaction chains of the free radicals, resisting the mutation, inhibiting the expression of the tumor gene, causing the death of tumor cells, preventing and treating the tumor generation, preventing and treating the secondary tumors and the transfer of the secondary tumors and preventing and treating infection. Therefore, as the medicine for preventing and treating untoward reactions in radiotherapy and chemotherapy of tumor, the dihydromyricetin can inhibit and alleviate chemical damage, prevent and treat damage of a mutagen and further prevent gene mutation or the secondary tumors; and by combination with the radiotherapy and chemotherapy, the effects of preventing untoward reactions in radiotherapy and chemotherapy of tumor and preventing generation of tumors are achieved.

The invention provides a hydrogen peroxide oxidation combined amino wet desulphurization and denitration method and device. Firstly, an amino solution is used for removing sulfur dioxide with high efficiency to obtain a sulfite solution having reductibility; secondly, hydrogen peroxide is decomposed on the surface of a catalyst to obtain nitric oxide in high-activity free radical high-efficiency oxidation desulphurization gas; and finally, sulfite solution and nitric oxides are mixed and react to realize an aim of highly effectively absorbing the nitric oxides, so that a competitive relation formed by reaction of sulfur dioxide and nitric oxide with high-activity free radicals is avoided, the consumption quality of an oxidizing agent is saved, and the reductibility of the sulfite solution can be used for reducing part of the nitric oxides to obtain nitrogen. The method and the device can be used for solving the technical problems that the denitration efficiency is low, the oxidation efficiency is low, the running cost is high and the like in a traditional pollutant removing process, a liquid-phase high-efficiency removal smoke products and product recycling type desulphurization and denitration mode is built, and the classification conversion of pollutants in a two-stage tower can be realized.

The present invention relates to a process comprising the steps of reacting in the presence of a hydrosilylation catalyst, a first reaction mixture comprising a free radical reactive compound and a silicon containing compound to form a silicon substituted glyceryl (meth)acrylate.

Embodiments disclosed herein include an abatement system for abating compounds produced in semiconductor processes. The abatement system includes an exhaust cooling apparatus located downstream of a plasma source. The exhaust cooling apparatus includes a plate and a cooling plate disposed downstream of the plate. During operation, materials collected on the plate react with cleaning radicals to form a gas. The temperature of the plate is higher than the temperature of the cooling plate in order to improve the reaction rate of the reaction of the cleaning radicals and the materials on the plate.

The invention relates to high-strength-and-viscosity double-layer hydrogel and a preparation method thereof. The preparation method comprises the steps of forming a substrate layer by free radical polymerization, forming tough hydrogel, when free radical reaction is not completed, adding viscous hydrogel on a tough layer, and continuously performing free radical reaction, so that the upper-layer viscous hydrogel and the lower-layer tough hydrogel which is not completely reacted are bonded to form the high-strength-and-viscosity double-layer hydrogel. The method is proved to enable the hydrogel to have a good bonding property without an obvious layered structure; the method is simple and effective, toughness and viscosity are combined together, and the application field of the hydrogel is widened; shown by mechanical property tests, the mechanical strength of the viscous and tough hydrogel reaches 1.3 MPa, and release force strength can meet most application requirements.

A dicing die-bonding film comprising a dicing film having a pressure-sensitive adhesive layer on a base and a die-bonding film on the pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer comprising an acrylic pressure-sensitive adhesive comprising an acrylic polymer which comprises an acrylic ester, a hydroxyl group-containing monomer where a ratio is in a range of 10-40 mol % to 100 mol % of the acrylic ester, an isocyanate compound having a radical reactive carbon-carbon double bond where a ratio is in a range of 70-90 mol % to 100 mol % of the hydroxyl group-containing monomer, and a compound having two or more radical reactive carbon-carbon double bonds where a ratio is in a range of 10-60 parts by weight to 100 parts by weight of the acrylic polymer, and the die-bonding film is formed from an epoxy resin and is laminated on the pressure-sensitive adhesive layer.