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35results about How to "High priming activity" patented technology

A kind of preparation method of high performance water reducer

A preparation method of a polycarboxylate high-performance water reducer, under the protection of an inert gas and under the action of an oxidation-reduction initiation system and a chain transfer agent, the active macromonomer A (methallyl poly Oxyethylene ether), small molecule monomer B (methacrylic acid or acrylic acid) and small molecule monomer C (sodium methacrylate, sodium propylene sulfonate or sodium styrene sulfonate) are prepared by copolymerization in water. The invention adopts a highly active oxidation-reduction initiation system, which can increase the polymerization reaction rate, lower the polymerization temperature and shorten the reaction time, and the polymer has an ideal molecular structure. The water reducing agent prepared by the invention has excellent properties such as high water reducing rate, good dispersibility, no loss of slump over time, and high concrete strength; at the same time, the method of the invention adopts copolymerization reaction in water, the preparation process is simple, and it also has green Environmental protection, low energy consumption, low cost and other characteristics.
Owner:江苏天音化工有限公司 +1

Method for preparing water-soluble graft polymers based on active/controllable radical polymerization

The invention discloses a method for preparing water-soluble graft polymers through active / controllable radical polymerization. The method can be used for controllable radical polymerization of various water-soluble monomers of a (methyl) acrylamide monomer, (methyl) acrylic acid, (methyl) acrylate and the like, so as to prepare the water-soluble graft polymers with different molecular weights. The preparation method is particularly realized through the following steps: firstly, preparing a water-soluble polyfunctional macroinitiator by adopting a chemical modification manner; secondly, initiating active / controllable radical polymerization of the water-soluble monomers by the macroinitiator under the heating or visible light / ultraviolet light irradiation condition, and preparing the molecular weight and chemical constitution controllable water-soluble graft polymers. The method is simple in synthetic route, low in production cost and safe and convenient to operate; the prepared macroinitiator is high in dissolution rate in water phase and high in initiating activity, and can be used for preparing the chemical constitution and molecular weight controllable water-soluble graft polymers.
Owner:BEIJING UNIV OF CHEM TECH

Sugar cane stem specific expression promoter and plant expression vector thereof

The invention relates to a special and high-effective expression promoter of a sugar cane stem and an expression vector of a plant, a PCR method is enlarged after the total DNA is extracted from sugar cane, and then the expression vector is connected with a pMD-18T vector, the cell of bacillus coli DH5Alpha is transformed, through selecting the masculine, the promoter of the sugar cane hexose transportation protein gene PST2(Alpha) is cloned and obtained, the length of the promoter is 1968bp, through replacing the composition CaMV35S promoter on the expression vector pCAMBIA1301 of the plant, a new expression vector of the plant is constructed, and the name is pCAMBIA1900. By obtaining the promoter, an effective tool is provided for the research of the sugar cane trans-gene and the sugar cane molecular in the biology, and the essential condition of the research and the development of the biological product with high additional archery is particularly created for adopting the sugar cane as the bioreactor production. Therefore, the obtaining of the promoter has an important theoretical and practice significance.
Owner:INST OF TROPICAL BIOSCI & BIOTECH CHINESE ACADEMY OF TROPICAL AGRI SCI

Scratch-resistant special coating and preparation method thereof

The invention discloses a scratch-resistant special coating and a preparation method thereof. The scratch-resistant special coating comprises polyester acrylate, amine modified polyether acrylate, ethoxylated trimethylolpropane triacrylate, a wetting agent, a dispersing agent, a thickening agent, a leveling aid, nano silicon dioxide, fatty alcohol, a photoinitiator and a polymerization inhibitor.The preparation method comprises the following steps: sequentially adding the polyester acrylate, the amine modified polyether acrylate, a coalescing agent, the leveling aid, the wetting agent, the dispersing agent, the thickening agent and the polymerization inhibitor into a reaction kettle A, stirring the materials to obtain a solvent A, adding nano silicon dioxide and fatty alcohol into a high-pressure reaction kettle B to obtain a solvent B, slowly adding the solvent B into the solvent A, then mixing and stirring the materials, finally sequentially adding the photoinitiator and ethoxylatedtrimethylolpropane triacrylate into the reaction kettle A, and stirring the materials to obtain a coating. The prepared coating has excellent wear resistance, scratch resistance and good comprehensive mechanical properties.
Owner:湖南太子化工涂料有限公司

Thioxanthone visible light initiator, and preparation method and application thereof

The invention provides a thioxanthone visible light initiator, and a preparation method and application thereof. The structure of the thioxanthone visible light initiator is shown as a formula (I), and R in the formula (I) is benzyl, 4-dimethylamino benzyl, 4-methyl benzyl, 3-methyl benzyl, 2-methylbenzyl, 4-benzyloxybenzyl, 4-methoxybenzyl, 3-(trifluoromethyl)benzyl, 4-bromobenzyl, 3-cyanobenzyl, 3-nitrobenzyl, 2-(trifluoromethyl)benzyl, 3, 5-di(trifluoromethyl)benzyl or 4-cyanobenzyl. The thioxanthone visible light initiator provided by the invention has good compatibility with acrylate, can effectively initiate monomer polymerization without an auxiliary agent, can initiate cationic polymerization or free radical-cationic polymerization of epoxy and vinyl ether monomers when being compounded with iodonium salt, has high initiation activity, is simple in structure, and facilitates industrial production.
Owner:GUIZHOU EDUCATION UNIV

Phenolic hydroxyl-containing amino acid-N-thiocarboxylic anhydride monomer and synthesis and polymerization method thereof

The invention discloses a synthesis and polymerization method of a phenolic hydroxyl-containing amino acid-N-thiocarboxylic anhydride (NTA) monomer. An amino acid (comprising N-substituted glycine)-NTA monomer with unprotected phenolic hydroxyl is synthesized for the first time; in the synthesis method, raw materials are cheap and easy to obtain, a synthesis route is simple and the structure of atarget product is clear. In controllable ring-opening polymerization on the monomer, polymerization reaction conditions are moderate; organic amine can trigger one or more of amino acid-NTA to be subjected to the ring-opening polymerization in a solvent and react at the temperature of 0 DEGC to 150 DEG C for 0.5 hour to 4 days, so that a corresponding polyamino acid homopolymer or copolymer is prepared. A chain length of the polymer can be controlled through a feeding ratio of the monomer / an initiator and structural characteristics are clear. The invention provides a novel method for synthesizing an amino acid polymer with a side chain containing phenolic hydroxyl, and the novel method has a great application prospect in the field of biological materials.
Owner:ZHEJIANG UNIV

A temperature-resistant and salt-resistant multi-component copolymer and its preparation method and application

The invention discloses a preparation method of a temperature-resistant and salt-resistant soluble multi-component copolymer: (1) Mixing a temperature-resistant water-soluble polymer solution and a photoinitiator solution, adding a water-soluble monomer, mixing, passing an inert gas to remove oxygen , and then placed under ultraviolet light for 10 to 30 minutes, and the light intensity was set to 500 to 10000 μW / cm 2 ; That is, a temperature-resistant multifunctional macromolecular initiator; (2) Dissolving the temperature-resistant multifunctional macromolecular initiator in water, then adding monomers, passing an inert gas to remove oxygen; Living / controllable radical polymerization of water-soluble monomers to obtain temperature-resistant and salt-resistant multi-polymers. The temperature-resistant and salt-resistant multi-component copolymer of the present invention has an ultra-high molecular weight of 1.9×10 7 Above, and temperature-resistant, salt-resistant, it can be used to increase the viscosity of aqueous solution under high-temperature and high-salinity conditions, and can be used as an oil displacement agent for tertiary oil recovery under high-temperature and high-salinity geological conditions to enhance oil recovery.
Owner:CHINA PETROLEUM & CHEM CORP +1
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