4 results about "Free Radical Process" patented technology

The application provides an alpha-carboxyl-beta-diimine nickel complex and a preparation method and application thereof and a preparation method of ethylene-methyl acrylate copolymer. The alpha-carboxyl-beta-diimine nickel complex has a structure shown in general formula (I): in the general formula (I), Ar is selected from 2,6-dialkylphenyl; X is chlorine or bromine; and L is acetonitrile or benzonitrile. The preparation method of the alpha-carboxyl-beta-diimine nickel complex is that acetylacetone is reacted with 2,6-dialkylaniline, then reacted with ammonium formate under the action of alkyl lithium, and then reacted with a halogenated nickel salt in an acetonitrile or benzonitrile solvent to obtain the alpha-carboxyl-beta-diimine nickel complex. The application further provides a preparation method of ethylene-methyl acrylate copolymer, which uses the alpha-carboxyl-beta-diimine nickel complex as a main catalyst. The application improves the copolymer molecular weight and the methyl acrylate insertion rate, and makes the prepared EMA similar to the branched structure of a commercial product prepared by a free radical process.

The present application relates to a kind of preparation of β-sulfonyl methacrylate compound method. Specifically under the condition of oxidation, end alkyne, sodium organic sulfinic acid under carbon monoxide atmosphere one-pot method is prepared. The present application is widely from substrate, commercially available end alkyne and sodium organic sulfinic acid, under oxidation and without transition metal catalysis, by radical process, obtains a series of β-sulfonyl methacrylate compound.

The invention discloses a machine learning-based antioxidant prediction system for a resveratrol dimer, and belongs to the technical field of biological antioxidant experiments.The machine learning-based antioxidant prediction system comprises the steps of determining dominant conformation and a reaction mechanism, summarizing and obtaining an antioxidant structure-function relationship and an influence rule of the resveratrol dimer, and predicting the antioxidant structure-function relationship of the resveratrol dimer. The anti-oxidation mechanism module determines an energy channel and an anti-oxidation mechanism of the resveratrol dimer in the process of removing different free radicals, the reliability verification module performs an experiment based on theoretical simulation and verifies the reliability of calculation of the anti-oxidation ability of the resveratrol dimer, and the prediction guidance module determines the anti-oxidation ability of the resveratrol dimer based on the theoretical simulation and the experimental verification result. According to the method, a resveratrol biopolymer antioxidant database is constructed, different machine learning models are adopted for screening, an excellent antioxidant is predicted and guided to be designed according to a screening result, and the method has important practical application value for deep development and utilization of three types of resveratrol biopolymers.

The invention relates to an aqueous coating composition comprising a first crosslinkable oligomer-stabilized vinyl polymer dispersion DA, a second crosslinkable oligomer-stabilized vinyl polymer dispersion DB and at least one crosslinker X, wherein DA comprises a vinyl oligomer OLA and at least one vinyl polymer PA, said vinyl oligomer OLA and optionally said at least one vinyl polymer PA comprising pendant functional groups which are reactive with the functional groups of the at least one crosslinker X, and pendant olefinically unsaturated functional groups which are crosslinkable by a free radical process; DB comprises a vinyl oligomer OLB and at least one vinyl polymer PB, said vinyl oligomer OLB and / or optionally said at least one vinyl polymer PB comprising pendant functional groups which are reactive with the functional groups of the at least one crosslinker X; the invention also relates to a process for the preparation of said crosslinkable oligomer-stabilized vinyl organic polymer dispersion. The invention also relates to the use of said coating composition for coating a wooden substrate.