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2387 results about "Functional monomer" patented technology

Functional monomers are those showing particularly reactive side-chain groups that can be used in order to synthesize more complex vinyl compounds, such as macromonomers; or to improve the functionality of preformed polymer chains.

High-strength high-tenacity protein molecule imprinting hybrid gel film and preparation method thereof

The invention relates to a high-strength high-tenacity protein molecule imprinting hybrid gel film and a preparation method thereof. The preparation method comprises the following steps of: with sodium alginate as a molecular frame, a water-soluble compound as a pore-forming agent as well as acrylamide and derivants thereof as functional monomers, dissolving the functional monomers and a protein template to form a complex, adding a chemical crosslinking agent and an ionic crosslinking agent, and initiating the polymerization to form high-strength and high-tenacity double-crosslinked network hydrogel containing protein; and eluting the pore-forming agent and the protein template to obtain a porous hybrid gel film, wherein the porous hybrid gel film has larger adsorbing capacity and better adsorptive selectivity on the protein template. The performances of the gel can be changed by using various environment stimulating factors, such as temperature, pH, solvent property, ion strength and special chemical simulation, and therefore, the interaction between the molecule imprinting hybrid film and protein can be controlled. The preparation method is simple in process and low in cost; and the obtained porous hybrid gel film has a favorable application prospect in the fields including protein separation and analysis, protein control and release, tissue engineering and the like.

Thermosetting acrylic resin for powder coating as well as synthesis method and applications of thermosetting acrylic resin

The invention relates to thermosetting acrylic resin for a powder coating. The thermosetting acrylic resin is prepared from the following raw materials in parts by mass: 4-14 parts of an initiator, 110-280 parts of soft monomers, 400-570 parts of hard monomers, 192-450 parts of functional monomers, and 1-8 parts of a molecular weight regulator, wherein the soft monomers refer to acrylic acid alkyl ester compounds, and the hard monomers refer to methacrylate, styrene, or compounds of derivatives of methacrylate and styrene. The acrylic resin contains epoxy functional groups and hydroxyl functional groups simultaneously, wherein the epoxy equivalent is 570-630g/mol and the hydroxyl value is 40-50mgKOH/g; the acrylic resin can react with various substances such as carboxyl, amidogen and isocyanate and can be used for powder coating. A coating film, which is formed after the thermosetting powder coating prepared from the acrylic resin in combination with other materials is sprayed, has excellent weather resistance, good leveling performance, outstanding surface hardness, and high glossiness, durability and decorating performance; the powder coating can be used for indoor or outdoor metal sectional materials or building materials. The thermosetting acrylic resin can substitute for TGIC (triglycidyl isocyanurate) to a certain extent so as to avoid the use of the toxic substances.

Aqueous acrylic emulsion, aqueous adhesive for plastic-plastic composite materials and preparation method thereof

The invention discloses an aqueous acrylic emulsion, an aqueous adhesive for plastic-plastic composite materials and a preparation method thereof, and belongs to the field of preparation of adhesive. The acrylic emulsion is polymerized from 30-50 wt% of acrylic acid hard monomer, 40-60 wt% of acrylic acid soft monomer and 5-10 wt% of acrylic acid functional monomer under the action of water, an emulsifying agent, an initiator, a buffering agent and a pH regulator. The invention also provides an aqueous adhesive and a preparation method thereof. The molecule segment of the film forming matter (acrylate copolymer) in the aqueous acrylic emulsion has various chemical groups, such as -OH, -COOH, -NH and the like; and the chemical groups can form various chemical bonds and hydrogen bonding acting force, and thereby having favorable adhering force for various composite substrates (plastic films, aluminum plating films, metal foils and the like). By properly matching the soft monomer and the hard monomer and adopting the corresponding functional monomer to participate in the copolymerization, the invention enhances the adhesive affinity to the plastic films with low surface tension, thereby enhancing the wetting property of the adhesive on the surface of the plastic films and the combined strength.

Waterborne polyurethane-acrylate emulsion prepared by seed emulsion polymerization method

The invention discloses waterborne polyurethane-acrylate emulsion prepared by the seed emulsion polymerization method. The method comprises the following steps: performing vacuum dehydration treatment to polymer polyol or diol in advance, adding micromolecular chain extender A, adding diisocyanate to react under heat insulation condition; adding hydrophilic chain extender and cosolvent to react; adding functional monomer A and catalyst to react; cooling, adding viscosity reducer and neutralizer to react, adding deionized water while stirring at high speed to obtain emulsion, slowly adding the mixture of micromolecular chain extender B and deionized water to cure and obtain vinyl-terminated reticulated polyurethane emulsion; mixing anionic emulsifier, non-ionic emulsifier and initiator with deionized water, adding acrylate mixed monomer to prepare emulsion fast, then introducing nitrogen, adding reductant to initiate polymerization and ensure that the emulsion has blue fluorescence, then adding vinyl-terminated reticulated polyurethane emulsion, and standing under heat insulation condition to obtain the core-shell type polyurethane-acrylate emulsion. The emulsion disclosed by the invention has good water resistance and wear resistance and meets the requirement of environmental protection.

Methyl acrylate pressure-sensitive adhesive for LCD polarizer and preparation method thereof

The invention relates to a methyl acrylate pressure-sensitive adhesive for an LCD polarizer and a preparation method thereof, which belong to the technical field of tackiness agent. The pressure-sensitive adhesive comprises the following three materials with the quality shares: a. weight average molecular weight Mw is 100000-2000000, dispersion degree Mw/Mn is 4-20 acrylate copolymer 100 shares, b. coupling agent, c. cross linker 0-15 shares, the comonomer of prepared acrylate copolymer comprises two parts: 1. (methyl) acrylate monomer : 90%-99.5%, 2. functional monomer: 0.5%-10%, wherein the functional monomer is one or several of (methyl) acroleic acid and (methyl) acroleic acid hydroxy ethyl, (methyl) acroleic acid hydroxypropyl acrylate, itaconic acid, acrylamide, N-hydroxymethyl acrylamide and maleic anhydride. The methyl acrylate pressure-sensitive adhesive does not contain elasticizer or low-molecular-weight acrylate copolymer and the like, can reach the use requirement without cross linker under the condition that the requirement to sticking property is low, and the glue layer has better stress relaxation property, and pressure-sensitive adhesive initial adhesion and stripping strength are both extremely ideal.

Slickwater fracturing fluid drag reducer and preparation method thereof

ActiveCN103013488AImprove stabilityReduce system complexity indexDrilling compositionFunctional monomerFracturing fluid
The invention discloses drag reducer which can be applied to slickwater fracturing fluid and a method for preparing drag reducer. The method includes: adding organic salt into acrylamide and functional monomer aqueous solution to prepare an aqueous phase, adding the aqueous phase into an oil phase system consisting of surfactant and base oil under the condition of high-speed stirring to form a stable W/O (water in oil) type microemulsion system, feeding nitrogen for dispersing oxygen, and adding initiator for polymerization to form a branchless long chain structure. The polymer microemulsion is a transparent or semitransparent thermodynamic stable system, can be quickly swelled into water and is directly usable. Adding a small quantity of the drag reducer during fluid transport can improve flow quantity and reduce energy consumption to some extent, and the drag reduction effect can reach 30%-65% when the drag reducer is compared with clear water. The drag reducer has the advantages of high stability, dissolving speed and dissolving performance, convenience in use, remarkable drag reduction effects and the like and is applicable to the slickwater fracturing technology, and excellent yield increasing effects are obtained after the drag reducer is applied to field fracturing operations.

Magnetic composite material surface imprinting thermosensitive adsorbent, and preparation method and application thereof

The invention relates to the technical field of preparation of environment functional materials, in particular to a magnetic composite material surface imprinting thermosensitive adsorbent, and a preparation method and the application thereof. The method comprises the following steps that: firstly, a ferroferric oxide/nerchinskite nanotube magnetic composite material is prepared by a solvent thermal synthesis method; secondly, the magnetic composite material is modified on ethenyl by using 3-(methacrylo) propyltrimethoxyl silane; and finally, the nerchinskite nanotube magnetic composite material is prepared by using the ethenyl-modified magnetic composite material as a substrate material, 2, 4, 5-trichlorophenol as a template molecule, methacrylate as a functional monomer, N-isopropylacrylamide as a thermosensitive functional monomer, ethylene glycol dimethacrylate as a cross-linking agent, and 2,2'-azodiisobutyronitrile as an initiator. The prepared thermosensitive imprinting adsorbent is obvious in thermal stability and magnetic stability, sensitive in magnetic effect and thermosensitive effect, relatively high in adsorption capacity, obvious in reversible absorption/release function along with temperature and obvious in tertiary calcium phosphate (TCP) molecule recognition performance.

Small-particle-size carboxylic styrene-butadiene latex and its preparation method

The invention belongs to the technical field of seed emulsion polymerization, relates to a preparation of a high polymer material, and especially relates to a small-particle-size carboxylic styrene-butadiene latex and its preparation method. Technical problems comprising unadjustable particle size, bad mechanical stability, bad chemical stability and the like of latexes in the prior art are solved in the invention. The preparation method which adopts a seed emulsion polymerization technology and adopts butadiene and styrene as monomers comprises the following steps: adding soft water, a seed latex, an electrolyte, a chelating agent and a pH buffering agent; heating; adding functional monomers, unsaturated carboxylic acid, a molecular weight adjustment agent, a composite emulsifier and an initiator; degassing when the conversion rate reaches above 98%; cooling; and synthesizing the carboxylic styrene-butadiene latex. Compared with the prior art, the preparation method of the small-particle-size carboxylic styrene-butadiene latex has the advantages of realization of the adjustment of the particle size of the latex, and simple operation; and compared with present carboxylic styrene-butadiene latexes, the carboxylic styrene-butadiene latex prepared in the invention has the advantages of narrow monodispersion, good fluidity, excellent mechanical stability and excellent chemical stability.

Cross-linked polymer microsphere for oil displacement of oilfield and preparation method for cross-linked polymer microsphere

ActiveCN102603966AWith intelligent regulation and drive functionIntelligent control and drive effect is goodDrilling compositionCross-linkFunctional monomer
The invention relates to cross-linked polymer microsphere for oil displacement of an oilfield and a preparation method for the cross-linked polymer microsphere. The cross-linked polymer microsphere is obtained by polymerization and cross-linking of the components including acrylamide monomers, dendritic functional monomers, cross-linking agent, emulsifier, dispersion media, initiator, deionized water and selectable initiator solvent. The microsphere has good heat stability and injectivity, can be applied to surfactant flooding of an oil reservoir at the temperature as high as 150 DEG C, and is applicable to the zone permeability range from 0.05 to 5000mD. The microsphere can be directly and quickly dispersed after entering a stratum and functions in intelligent blockage. The action mechanism includes that the cross-linked polymer microsphere absorbs water to swell in a water flow passage of a water zone to form a swelling cross-linked polymer aggregate with the grain size ranging from 0.1 to 10 micrometers, and single aggregate or multiple aggregates bridge to block a pore throat of the porous media water flow passage; but in an oil layer, the cross-linked polymer microsphere cannot swell and is difficult to block a flow passage, thereby having an intelligent function of blocking water but not blocking oil.
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