93 results about "Michael reaction" patented technology

A curable composition for electrical applications, the curable composition comprising (i) a compound having at least two alpha,beta-unsaturated groups and an equivalent weight of less than 250 g/mol, (ii) a catalyst capable of initiating a Michael reaction and (iii) a Michael donor having an equivalent weight of less than 250 g/mol, and a package for using this composition in electical splices.

Disclosed is a photosensitive composition for volume hologram recording which shows excellent interference fringe record and a volume hologram recording medium having lighter weight and excellent storage stability. The invention is directed to a volume hologram recording photosensitive composition comprising: (a) a compound having at least one active methylene group in one molecule or a compound having at least two active methine groups in one molecule; (b) a compound containing in one molecule two or more groups which are nucleophilicly added by a carbanion generating from an active methylene group or an active methine group; (c) a Michael-reaction catalyst; (d) a photopolymerizable compound; and (e) a photopolymerization initiator composition.

The invention discloses a synthetic method for a beta-aminocarbonyl compound, beta-mercapto ketone and beta-alkoxy ketone. In the method, ionic liquid is used as a catalyst, and aza-Michael, sulfa-Michael and oxa-Michael reactions of electron-deficient ketene and a nucleophilic reagent are carried out at room temperature so as to synthesize corresponding compounds. According to the invention, usage amount of the catalyst is small, and the catalyst has the advantages of high catalytic activity, good stability, low corrosivity, cyclical usability, good selectivity of products, simple operation and strong controllability; a substrate has a wide application scope, and good yield is obtained in addition of alcohol compounds with low reaction activity; the reactions are mild; reaction products and the catalyst can be easily separated, and the catalyst can be cyclically used.

The present invention relates to amino group-containing chiral ionic liquid and its preparation process and application in organic asymmetrical catalytic Michael reaction. The chiral ionic liquid has the general expression of A+B-, A+ is shown, and B- is halogen ion or other negative ions as shown. The preparation process includes the following steps: the reflux reaction between amino acid derived halogenated fatty amine haloid and substituting imidazole in organic solvent, and the neutralization of the reacted liquid to obtain the product. The chiral ionic liquid with connected imidazole cycle possessing excellent stereo steric hindrance effect has excellent chiral catalytic performance on Michael reaction except its application as common ionic liquid.

The invention discloses a method for assembling nano-particles carrying laminin and SDF-1alpha on surfaces of Ti materials. The method comprises the steps that firstly, Hep-PLL nano-particles carrying Ln are prepared; then DM coatings are prepared on the surfaces of angiocarpy materials, nano-particles including amidogen are fixed to surfaces of samples in a covalence mode through the characteristics that DM and the amidogen can generate the Michael reaction and the Sievert reaction; finally, through the characteristics that heparin in the nano-particles can be specially bound with the SDF-1alpha, the SDF-1alpha is assembled to the surfaces of the nano-particles, and therefore multifunctional bioid modification surfaces with anticoagulation, hyperplasia prevention and endothelium regeneration inducing characteristics are constructed. According to the method, the nano-particle modification layers with the anticoagulation, hyperplasia prevention and endothelium regeneration inducing characteristics are constructed on the surfaces of the angiocarpy materials, the blood compatibility and endothelium and endothelial progenitor cell compatibility of the materials are obviously improved, and the capacity of restraining smooth muscle hyperplasia is enhanced.

The present invention is to provide a curable coating composition having much less of a volatile organic component, and being excellent in coating film performance such as durability and scratch resistance, and a coating film forming method using the above curable coating composition capable of suppressing generation of sagging and so on. The present invention is a curable coating composition which comprises (a) a component having an active methylene group and/or an active methine group, (b) a component having a methacrylate group and/or an acrylate group, (c) a Michael reaction catalyst and (d) a photo-polymerization initiator. The present invention also provides a coating film forming method which comprises a step (1) of applying a curable coating on a substrate to be coated and a step (2) including a stage of irradiating with ultraviolet ray and a stage of heating, said curable coating comprising the above curable coating composition.

The invention discloses a method for restoring heavy metal contaminated soil. The method comprises the following steps: with crylic acid modified chitosan as a restoring agent, placing polluted soil in a restoring agent aqueous solution and stirring and eluting, or applying the restoring agent aqueous solution to a paddy field to be ploughed and ploughing so as to transfer heavy metal from the polluted soil into eluent to realize restoring of heavy metal (Pb, Cr, Cu) contaminated soil. The crylic acid modified chitosan restoring agent is prepared by Michael reaction of chitosan and crylic acid, has the advantages of environmental friendliness, non-toxic and no harm, biodegradable property, no secondary pollution and rich material source. The restoring agent is good restoring effect for heavy metal contaminated soil, and the heavy metal content of restored soil reaches the primary standard of a farmland field. The chitosan derivative restoring agent is green, good in water solubility and high in chelating capability of heavy metal.

The invention discloses a glutathione response-type dual-drug carrier as well as a preparation method and application thereof, and belongs to the field of biomedical engineering materials. The preparation method comprise the following steps: performing Michael addition reaction to obtain hyperbranched poly(amide amine)s; then connecting a hydrophobic drug onto an end group amino of a high polymer by amidation reaction, so as to form a prodrug micelle molecule; then loading another hydrophobic drug by subject-object assembly of the prodrug micelle molecule, thus effectively increasing drug loading capacity and promoting an synergistic effect of the drugs; preparing to obtain the glutathione response-type dual-drug carrier. The method is mile, the operation is convenient, byproducts are fewer, and a product is easy to separate and purify, thus facilitating the material biocompatibility. The glutathione response-type dual-drug carrier has the advantages of simple material components, easy-to-get raw materials and good biocompatibility, and is hopefully widely applied to the field of the biomedical engineering materials as a great amount of surface functional groups capable of being modified provide support for the application of the carrier in preparing the biomedical engineering materials.

The invention discloses a 13-thioether substituted pleocidin derivative which is represented by a general formula (I) shown in the specification and has an insecticide and acarid-killing activity, and a preparation method thereof. The compound with the general formula (I) is obtained by a chemical synthesis method from natural pleocidin or a pleocidin derivative prepared by a semi-synthesis method as a raw material. The synthesis method disclosed by the invention comprises a 13-Michael reaction, an acylation reaction and an esterification reaction. The compound with the general formula (I) has good activity on various pests and acarids on crops. The compound with the general formula (I) is prepared into an acid addition salt by using a standard salt preparation technology to be used for crop protection.

The invention discloses a preparation method of a non-viral gene vector material. The method comprises the following steps of: performing michael reaction on polyol acrylate and amino alcohol to prepare an unmodified polymer; and reacting the unmodified polymer with a diamino group containing compound to prepare an ester bond-containing non-viral gene vector material. The method has the characteristics of easiness in preparation and high controllability; and the prepared non-viral gene vector material has the characteristics of high efficiency and low toxicity. The invention discloses application of the non-viral gene vector material to transfection of cells; and the application comprises the following steps of: mixing the non-viral gene vector material and genes; incubating to prepare a compound of a non-viral gene vector and a gene; and adding the prepared compound of the non-viral gene vector and the gene into receptor cells to finish the transfection of the genes in the cells. Thecompound of the non-viral gene vector and the gene has high gene transfection efficiency and superior biological safety for the transfection of the cells.

The invention discloses a pluridentate macromolecular bonding agent and a preparation method thereof. The structural formula of the bonding agent is as shown in (I). The preparation method of the bonding agent particularly comprises the following steps: taking tris(2-hydroxyethyl)isocyanurate and glycidyl methacrylate as raw materials; synthesizing pluridentate polyether ester with an unsaturated end group under the action of a catalyst; dissolving intermediate polyether ester with a solvent, introducing such functional groups as the hydroxyl group, the secondary amine group, aziridine and methyl aziridine by carbon-carbon double bonds of polyether ester and the Michael reaction of a primary amine compound or a secondary amine compound to obtain the pluridentate macromolecular bonding agent. The pluridentate macromolecular bonding agent is simple in preparation technology and easily accessible in raw material, and can be applied to the field of solid propellants. The structural formula (I) is as shown in the description, wherein X, Y and Z are 1, 2, 3, 4 and 5, and R is as shown in the description.

The present invention discloses a quaternary phosphonium salt compound and a preparation method thereof. The method uses cheap and readily available L-tartaric acid as the raw material, and conducts carboxyl esterification, hydroxyl protection, Grignard reaction, azide substitution, azide reduction and final reaction with phosphorus pentachloride, so as to obtain the quaternary phosphonium salt compound. The quaternary phosphonium salt compound is a novel Bronsted acid catalyst (a hydrogen bond donor catalyst), and can be used in the catalysis of asymmetric Mannich reaction, Michael reaction and Henry reaction.

The invention discloses a polymer with an anti-cancer property and a preparation method and application of the polymer, and belongs to the field of biomedical engineering materials. Hyperbranched polyamidoamine which contains disulfide bonds is obtained by Michael reaction; and growth of tumor tissue cells is inhibited by inherent pharmacological activity of the hyperbranched polyamidoamine, but the hyperbranched polyamidoamine does not have side effects on normal tissue cells. The preparation method is gentle, and is convenient to operate, by-products are less, products are easy to separate and purify, and biological compatibility of the material is facilitated. The polymer with the anti-cancer property is simple in material component, has easily obtained raw materials and is good in biological compatibility, has obvious curative effect when independently used as a potential anti-tumor drug, and does not need to be loaded with drugs additionally; and a large number of modifiable functional groups on the surface of the polymer support application of the polymer in preparation of the biomedical engineering materials, and the polymer with the anti-cancer property is expected to be widely applied to the field of biomedical engineering materials.

The present invention discloses a silane compound and a preparation method thereof, and a translucent dealcoholization type room temperature curing silicon rubber and a preparation method thereof. According to the present invention, amino-containing alkoxysilane and polyfunctional acrylate are subjected to a Michael addition reaction at a high temperature to synthesize novel alkoxysilane having a secondary amine structure and an ester structure, and the translucent dealcoholization type room temperature curing silicon rubber prepared by using the novel silane compound has characteristics of excellent storage stability, excellent adhesion with most substrates, especially polycarbonate, aluminum, copper and the like, and the like.

The invention relates to a two-component bonding agent system, consisting of a component A and a component B, comprising A) at least one polymer that possesses at least one Michael acceptor group, and in addition at least one Michael donor group, B) a compound catalyzing the Michael reaction, as well as optional additional additives and/or auxiliaries, wherein the polymer of component A has a number average molecular weight (M_n) between 1000 g/mol and 1 000 000 g/mol. Furthermore, 2K-adhesives, casting compounds and coating agents made from such bonding agent systems are described.

The invention relates to a method for preparing 1,7-diazaspiro[4.5]decane and derivatives thereof, and mainly solves the technical problems that the synthetic route is long, the yield is low, an intermediate is difficult to purify, reaction conditions are rigorous, and mass production cannot be performed in the prior art. The method comprises the following steps of: performing Michael addition reaction on N-PG-3-nitropyridine serving as a raw material and acrylic ester or acrolein in alcoholic solution or acetonitrile to obtain N-PG-3-(3-nitropyridine-3-yl)propionate or N-PG-3-propanal-3-nitropyridine; adding a catalyst into the product in an organic solvent, and performing hydrogenation reduction ring-closing reaction to obtain 1,7-diaza-2-oxy-spiro[4.5]decane with a protective group or 1,7-diazaspiro[4.5]decane with a protective group; and adding a reducing agent into the 1,7-diaza-2-oxy-spiro[4.5]decane with the protective group in the organic solvent to obtain the 1,7-diazaspiro[4.5]decane with the protective group. The method has the advantages of a few reaction steps, high yield and mild conditions, and is a synthetic method with large-scale preparation value.

The invention relates to a humus acid polyethylene glycol grafted copolymer and a preparation method thereof, and belongs to the field of modification of natural polymers. A humus acid molecule servesas a skeleton structure, peg polymer segments are covalently bonded to the side chain of the humus acid. The preparation method of the grafted copolymer comprises the steps that firstly acrylic acidesterified humus acid is prepared through acylation reaction of the humus acid and acryloyl chloride under condition of trimethylamine existing; secondly, the humus acid was esterified by acrylic acid, Michael reaction is conducted with aminopolyethylene glycol monomethyl ether to prepare a humus acid polyethylene glycol grafted copolymer coarse product; and finally, a dialysis technology is usedfor removing unreacted amino polyethylene glycol monomethyl ether and sodium hydroxide in the coarse product, a final product is obtained after drying. The humus acid polyethylene glycol grafted copolymer and the preparation method thereof have the beneficial effects that a water-soluble and non-toxic polyethylene glycol chain segment is introduced in the humus acid structure to overcome the performance defect of the poor water solubility, the product has good solubility in water, the preparation method is high in efficiency, the reaction condition is mild, using of organic solvent is avoided,and green production is easy to achieve.