369 results about "Macromonomer" patented technology

The invention discloses a novel modified starch-based polycarboxylate superplasticizer and a preparation method thereof, and belongs to the technical field of concrete admixtures. The preparation process comprises the following steps: (1) performing acidolysis treatment on starch to obtain acidolysis starch; (2) modifying the acidolysis starch and a double-bond modifier under the action of auxiliaries such as a polymerization inhibitor to prepare novel double-bond-containing modified starch (AS); (3) mixing AS and a polyether macromonomer in water to form a base solution; (4) dropwise adding an acrylic monomer and a chain transfer agent into the base solution, and carrying out a copolymerization reaction through an initiation system; and (5) insulating and neutralizing to obtain a finished product. In order to solve the problems of non-renewable petroleum-based raw materials, high production cost and the like of the traditional polycarboxylate superplasticizer (PCA), active double bonds are introduced into modified starch by a solvent-free semi-dry process to replace part of polyether macromonomers, so that the polymerization activity and grafting ratio of the modified starch are effectively improved, the water-reducing dispersion effect of the modified starch is enhanced, and the water-reducing property of the modified starch is improved. The water reducer has the advantages of low mixing amount, high water reduction and the like, and has economic and environmental benefits.

The invention discloses a C6 monomer polycarboxylate superplasticizer and a preparation method thereof. The C6 monomer polycarboxylate superplasticizer is prepared from the following raw materials in parts by mass: 300-380 parts of C6 ethylene glycol monovinyl polyglycol ether polyether macromonomer, 7.5-11.0 parts of acrylic acid, 0.3-1 part of chain transfer agent, 0.15-1.0 part of reducing agent and 0.6-1.2 parts of oxidizing agent. The water reducing agent prepared by the invention has the advantages of simple process, energy conservation, environmental protection, shortened synthesis time, improved production efficiency, high adaptability and better water reducing property.

The invention discloses a side-chain type amphiphilic organosiloxane macromonomer and a preparation method and application thereof, the side-chain type amphiphilic organosiloxane macromonomer can be well mixed with various hydrophilic monomers under the condition of no hydrotropy of a solvent, and a silicon hydrogel material with high oxygen permeability and high hydrophilicity can be prepared. The invention also discloses a silicon hydrogel which is prepared from the side chain type amphiphilic organosiloxane macromonomer and the following components through polymerization reaction: 5-45 parts of side chain type organosiloxane macromonomer, 0-30 parts of micromolecular silicon monomer, 25-70 parts of hydrophilic monomer, an initiator and a cross-linking agent. The silicon hydrogel has good hydrophilic performance, high light transmittance and high oxygen permeability. Meanwhile, the invention further discloses a corneal contact lens which is made of the silicone hydrogel material and has the advantages of being good in oxygen permeability, hydrophilicity, light transmission, wearing comfort and the like.

The invention belongs to the technical field of concrete, and particularly relates to a polycarboxylate superplasticizer and a preparation method thereof. The polycarboxylate superplasticizer is prepared from an unsaturated polyether macromonomer, an unsaturated acid monomer, an unsaturated carbonate monomer, an unsaturated amino monomer, an initiator, a reducing agent, a chain transfer agent, deionized water, a solubilizer and organic alcohol amine. Wherein the unsaturated carbonate monomer is allyl methyl carbonate, and the unsaturated amino monomer is 2-aminoethyl methacrylate hydrochloride. According to the invention, excellent water reducing effect and stable control capability on concrete slump are maintained, and micro-cracks can be effectively made up through a dual mechanism formed by carbonate release and CaCO3 precipitation in the early and later stages of concrete hardening.

The invention relates to the technical field of concrete admixtures in building materials, in particular to a viscosity reduction type polycarboxylic acid water reducer suitable for high-strength concrete and a preparation method of the viscosity reduction type polycarboxylic acid water reducer. The hydrophobic modified unsaturated double-chain polyether macromonomer is prepared from the following components in parts by mass: 20 to 30 parts of unsaturated acid, 200 to 300 parts of hydrophobic modified unsaturated double-chain polyether macromonomer, 10 to 15 parts of phosphate monomer, 2 to 4 parts of oxidizing agent, 1 to 2 parts of reducing agent, 1 to 2 parts of chain transfer agent, 5 to 10 parts of neutralizing agent and 120 to 180 parts of water. According to the invention, the polyether chain can unfold in a pore solution, the steric hindrance effect is further enhanced, cement particles are ensured to be effectively dispersed in a compact space, and meanwhile, the hydrophobic part of the side chain can effectively reduce the surface tension of the pore solution, so that the condition of overhigh viscosity is avoided, and the flowability and constructability of the concrete are improved.

The invention relates to the technical field of polycarboxylate superplasticizers, and discloses a durability-enhanced polycarboxylate superplasticizer and a preparation method thereof.The preparation method comprises the following steps that raw materials such as a polyether macromonomer are prepared, the polyether macromonomer and the like have the requirements for purity and dosage, deionized water and the polyether macromonomer are added into a reaction kettle to form a solution A, and the solution A is prepared; and preparing an initiator solution B with the mass concentration of 10-20% from ammonium persulfate, heating to 60-80 DEG C, stirring, firstly adding 1 / 3 of the initiator solution B to react, then preparing a mixed monomer solution from acrylic acid and the like, dropwise adding the mixed monomer solution and the residual initiator solution B within 2-3 hours, carrying out heat preservation reaction, cooling, and regulating the pH value to 6-8 by using sodium hydroxide to obtain a finished product. The sulfonic acid group of the introduced sodium methallyl sulfonate functional monomer can enhance the electrostatic repulsion between water reducer molecules and cement particles, so that the dispersing performance of the water reducer is improved, the agglomeration of the cement particles can be inhibited to a certain extent, and the fluidity of concrete can be maintained.

The invention relates to the field of oil exploitation, in particular to temperature-resistant and salt-resistant efficient gel as well as a preparation method and application thereof, which are used for solving the problems that the efficiency of the gel is influenced and the oil displacement effect is reduced due to poor high temperature resistance and salt resistance and easiness in failure of the existing polyacrylamide hydrogel. According to the preparation method, through a copolymerization technology, various monomers with excellent temperature resistance and salt resistance, such as acrylamide, methacryloyloxyethyl trimethyl ammonium chloride, 2-acrylamido-2-methylpropanesulfonic acid, a temperature-resistant monomer and a hydrophobic macromonomer, are integrated, so that the gel can bear a relatively high temperature without degradation or performance reduction; the prepared oil displacement gel has good stability in a high-salinity environment, does not lose an oil displacement effect due to the existence of salt, ensures the activity and stability of the gel in a high-temperature and high-salt-content oil reservoir environment, and obviously enhances the oil displacement efficiency of the gel in crude oil exploitation, thereby greatly improving the exploitation efficiency and recovery rate of crude oil.

A method for preparing monodisperse nanoscale calcium fluoride, comprising the following steps: (S1) dispersing calcium long-chain alkylbenzenesulfonate and an acrylate copolymer in a mixed solution of water, n-hexane, and an alcohol to form a stable emulsion A, wherein monomers of the acrylate copolymer comprise (meth)acrylic acid, a polyether macromonomer, and a C1-4 alkyl (meth)acrylate; (S2) dissolving a fluoride salt in water, adding polyvinyl alcohol, and uniformly mixing these materials to obtain a solution B; and (S3) slowly dropwise adding the solution B to the emulsion A under stirring and ultrasonic conditions, and carrying out standing for aging, centrifugal separation, washing, and drying to obtain monodisperse nanoscale calcium fluoride. By using the calcium long-chain alkylbenzenesulfonate with surface activity as a calcium source in combination with homemade acrylate as a dispersing agent, an emulsion is formed in a specific combined solvent, and by dropwise adding a fluorine salt aqueous solution to the emulsion under an ultrasonic condition, nanoscale calcium fluoride with a uniform and controllable particle size can be prepared under the action of a microemulsion.

The invention provides a copolymer oil-displacing agent containing a modified polyether amine macromonomer and a preparation method thereof, and belongs to the field of oilfield chemistry, the preparation method comprises the following steps: adding p-chlorobenzaldehyde and polyether monoamine which are equimolar into ethanol, stirring at room temperature, and carrying out Schiff base reaction to obtain an intermediate product solution; adding N-(3-dimethylaminopropyl) methacrylamide of which the mole is equal to that of p-chlorobenzaldehyde into the intermediate product solution, carrying out quaternization reaction, and carrying out rotary evaporation on ethanol to remove the ethanol, so as to obtain a modified polyether amine macromonomer; and polymerizing the modified polyether amine macromonomer and acrylamide, and crushing, hydrolyzing and drying a polymerization product to obtain the hydrophobic modified polyacrylamide containing the polyether amine structural unit. The oil-displacing agent has good temperature resistance and salt resistance, and can be used for preparing a polymer solution by taking seawater as a solvent.

The present invention relates to a biodegradable polymer composition formed by waterborne radical emulsion polymerization of monomers selected from ethylenically unsaturated monomers characterized in that, the polymer composition is composed of at least two different populations of particles, said populations differing in average particle size value by at least a factor of 1.5, wherein (a) a population P1 is constituted by particles having an average particle size of greater than 250 nanometers, said particles being constituted of polymer chains predominantly built of ethylenically unsaturated monomers, further comprising 0.5 to 50% by C weight of oligomer lactide 2-hydroxyethyl, methacrylate terminated macromonomer, based on the total weight of the monomers, and (b) a population P2, distinctive of P1 by average particle size value, is constituted by particles having an average particle size of less than or equal to 250 nanometers, said particles being constituted of polymer chains predominantly built of ethylenically unsaturated monomers, further comprising 0.5 to 50% by weight of oligomer lactide 2-hydroxyethyl, methacrylate terminated macromonomer, based on the total weight of the monomers, wherein said two different populations jointly constitute at least 70% by weight, preferably 90% by weight, of the total polymeric content within said composition.

The invention provides an ester-ether copolymerization type slump-retaining polycarboxylic acid water reducer and a preparation method of the ester-ether copolymerization type slump-retaining polycarboxylic acid water reducer. The water reducing agent is prepared from the following raw materials in parts by weight: 80 to 120 parts of main chain macromonomer, 20 to 35 parts of unsaturated carboxylic acid, 1.5 to 3.2 parts of initiator, 0.2 to 0.5 part of reducing agent, 0.3 to 0.8 part of chain transfer agent, 8 to 15 parts of neutralizer, 200 to 300 parts of solvent, 5 to 10 parts of diphosphonic polyether monomer, 3 to 6 parts of temperature-sensitive dynamic crosslinking monomer and 2 to 5 parts of amide-ether bond grafting monomer. The water reducer has the comprehensive performance of dispersion, slump loss resistance, mud resistance, high-temperature response and the like.

The invention relates to the technical field of admixtures for cement concrete, in particular to a polycarboxylic acid admixture for enhancing low-activity admixtures and a preparation method thereof, the polycarboxylic acid admixture is formed by polymerizing the following components: polyether macromonomer, unsaturated carboxylic acid I, exciting functional monomer A, slump retaining functional monomer B, rheological functional monomer C, oxidizing agent, reducing agent, chain transfer agent and water; the exciting functional monomer A, the slump retaining functional monomer B and the rheological functional monomer C are sequentially added, and the exciting functional monomer A is formed by polymerizing polyhydric alcohol, unsaturated carboxylic acid II, an initiator, phosphonic acid and an alcohol amine small monomer. Through molecular design, key functional groups such as phosphonic acid groups, amino groups and sulfonic acid groups are innovatively introduced into a polycarboxylic acid main chain, so that the polycarboxylic acid admixture has multiple synergistic functions of reducing the cement consumption, effectively activating a low-activity cementing material, stably improving the working performance of concrete and the like.

The invention provides a retarding type polycarboxylate superplasticizer as well as a preparation method and application thereof, and belongs to the technical field of building material concrete admixtures. The retarding type polycarboxylic acid water reducing agent is prepared from the following raw materials in parts by weight: 300 to 400 parts of polyether macromonomer, 60 to 150 parts of unsaturated carboxylic acid micromonomer, 30 to 60 parts of unsaturated sulfonic acid monomer, 15 to 30 parts of alkylphenol polyoxyethylene ether phosphate, 1.5 to 12 parts of chain transfer agent, 2 to 15 parts of initiator, 15 to 50 parts of caustic soda liquid and 200 to 600 parts of solvent. The polycarboxylic acid water reducing agent product with the retarding characteristic is synthesized through an RAFT method, the binding force between phosphate radicals and calcium ions in a cement pore liquid of the preparation raw material alkylphenol polyoxyethylene ether phosphate is high, hydration of C3A and formation of ettringite are delayed, the retarding effect of the water reducing agent is enhanced, and the polycarboxylic acid water reducing agent has the anion characteristic and the nonionic characteristic and can be used as a water reducing agent. And the workability of the concrete is improved.

The invention discloses a kind of isocyanate-waterborne hyperbranched multi-block copolymer composite emulsion adhesive and preparation method thereof, relate to the field of adhesive preparation technology, comprise the following steps: S1: prepare amphiphilic hyperbranched skeleton macromonomer, the amphiphilic hyperbranched skeleton macromonomer contains carbon-carbon double bond functional group and functional group capable of reacting with hydroxyl group; S2: the amphiphilic hyperbranched skeleton macromonomer, buffer, deionized water and polymerization inhibitor are mixed, and then the first hard monomer, the second soft monomer, the third functional monomer and the fourth hard monomer are added in sequence to react, and an aqueous hyperbranched multi-block copolymer emulsion is prepared; S3: isocyanate is mixed with the aqueous hyperbranched multi-block copolymer emulsion to obtain an isocyanate-waterborne polymer composite emulsion adhesive. The adhesive prepared by the present invention can greatly improve the mechanical strength and water resistance of the adhesive, and can meet the adhesive needs of various occasions.

The present invention relates to the technical field of concrete admixtures, and particularly relates to a rapid-dispersing polycarboxylate water reducer and a preparation method thereof. The water reducer is copolymerized from an acetyl-capped polyether macromonomer, acrylic acid, an ester macromonomer and functional monomer C through a copolymerization reaction. The rapid-dispersing polycarboxylate water reducer prepared by using a specific acetyl-capped polyether macromonomer in the present invention has a significantly improved adsorption rate and early adsorption amount on the surface of cement particles, and the later adsorption amount of the water reducer can be maintained at a relatively high level. The net paste dispersion time of the cement using this water reducer is short, and less of this water reducer is required to meet the same initial net paste fluidity requirement. This water reducer has a fast dispersion speed, good dispersion performance and good slump retention performance at low temperatures.

The invention discloses a polycarboxylate superplasticizer with a linear water-reducing rate as well as a preparation method and application of the polycarboxylate superplasticizer. The water reducing agent is prepared from a polyether macromonomer phosphating derivative, a carboxylic acid monomer, a sulfonic acid monomer, an ester slump retaining monomer, a linear regulation and control monomer and other units through a free radical emulsion polymerization process. Compared with a traditional polycarboxylic acid water reducer, the water reducer has more regular side chain arrangement, higher charge density, higher adsorption capacity and more stable dispersing performance, the water-reducing rate can be linearly increased along with the increase of the mixing amount within the effective mixing amount range, and the water-reducing efficiency is improved. The problem that the concrete fluidity is difficult to control due to nonlinear fluctuation of the water reducing rate of a traditional polycarboxylic acid water reducing agent is solved, and the method has important significance on improving the concrete construction stability and the engineering quality. The product provided by the invention has excellent mud resistance and slump loss resistance besides high linear water-reducing rate, is suitable for various cast-in-place and precast concrete projects, and has remarkable economic value and application prospect.

To provide a resin composition for adhesives that can form an adhesive layer excelling in: unevenness followability during bonding; shape retentivity before bonding; and softness during low-temperature use.SOLUTION: A resin composition for adhesives contains a methacrylic copolymer having a macromonomer (A)-derived constitutional unit and a vinyl monomer (B)-derived constitutional unit. The macromonomer (A) has an alkyl methacrylate (a)-derived constitutional unit having a C8-30 alkyl group.SELECTED DRAWING: None

The invention provides a preparation method of a single-ended vinyl hyperbranched polyether macromonomer, which can be applied to the technical field of hyperbranched polyether synthesis. The method comprises the following steps: carrying out ring-opening polymerization reaction on any one of an epoxy group-containing vinyl monomer, a hydroxyl group-containing vinyl monomer or a carboxyl group-containing vinyl monomer and glycidol in the presence of a catalyst and a polymerization inhibitor to form the single-ended vinyl hyperbranched polyether macromonomer with an amino group, ester group or ether group structure. The invention also provides a single-ended vinyl hyperbranched polyether macromonomer product.

The invention belongs to the technical field of building admixtures, and discloses a low-sensitivity polycarboxylate superplasticizer as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a polyether macromonomer, a crosslinking monomer and a first solvent to obtain a first solution; mixing a reducing agent, a chain transfer agent and a second solvent to obtain a solution A; mixing an unsaturated carboxylic acid monomer, an esterification monomer and a third solvent to obtain a solution B; mixing an oxidizing agent and a fourth solvent to obtain a solution C; the esterified monomer is obtained by carrying out esterification reaction on polyethylene glycol, p-toluenesulfonic acid and 3, 7-dimethyl-6-octenoic acid; and mixing the solution A, the solution B, the solution C and the first solution for reaction, and adjusting the pH value of the obtained reaction solution to 5-7 to obtain the low-sensitivity polycarboxylic acid water reducer. The low-sensitivity polycarboxylic acid water reducing agent can solve the problems that an additive is more sensitive due to performance difference of machine-made sand, large stone powder content and relatively high MB value, so that concrete is too large in gradual loss, bleeding and the like.

The invention relates to a drug-loadable exosome-loadable gel skin wound dressing, the gel material is prepared from biomass macromolecules, modified polyvinyl alcohol, an ionic macromonomer, an ionic micromolecule monomer and a hydrogen-bond interaction monomer as raw materials, and the gel dressing can load a large amount of cationic drugs and stem cell exosomes. The exosome can survive for a long time, and the loaded exosome and the medicine can be gradually released when the exosome covers the wound surface of the skin of the human body. In addition, the gel dressing has good mechanical properties, mechanical fatigue resistance, biocompatibility, moderate skin adhesiveness and water absorption, and can be used as a dressing for treating wound surfaces difficult to heal.

An adhesive may include an adhesive structure and an adhesive composition. The adhesive structure may include a graft copolymer. The adhesive composition may include at least about 1 wt. % and not greater than 40 wt. % of a macromonomer component for a total weight of the adhesive composition, at least about 50 wt. % and not greater than about 98 wt. % of a (meth)acrylic based polymeric component A for a total weight of the adhesive composition, and at least about 0.1 wt. % and not greater than about 30 wt. % of a tackifier component for a total weight of the adhesive composition. The macromonomer component may have a weight-average molecular weight of at least 1000 g / mol and a glass transition temperature (Tg) of at least about 40° C. The (meth)acrylic based polymeric component A may have a glass transition temperature (Tg) of not greater than about 20° C.

The invention discloses a water reducing agent as well as a preparation method and application thereof, and relates to the technical field of building materials, the water reducing agent is based on a Michael addition reaction of amide and acrylate under the catalysis of a phosphazene base, an acrylamide-polyoxyalkylene ether macromonomer copolymer and acrylate are subjected to addition to obtain a double-tooth suspension claw diacrylic acid (ester) structural unit, and the double-tooth suspension claw diacrylic acid (ester) structural unit is subjected to polymerization reaction to obtain the water reducing agent. By introducing the units, the initial dispersion speed of the water reducing agent is obviously improved, and the water reducing agent has obvious advantages in adaptability to high-admixture cement compared with a traditional high-performance water reducing agent; meanwhile, the time-dependent dispersion behavior of the water reducing agent can be flexibly adjusted by selecting whether the ester group is reserved or not.

The invention provides a concrete workability improved water reducing agent with a polyphosphate side chain as well as a preparation method and application of the water reducing agent. The water reducing agent is prepared from a phosphate macromonomer and a charged monomer through free radical copolymerization, the structure is characterized in that a side chain contains a large number of P-O bonds and has high ductility, and a main chain adsorption group has a flexible chain segment formed by ester bonds. The side chain segment of the water reducing agent contains a large number of P-O bonds, the hydrogen-bond interaction is stronger than that of the conventional polyether polyol chain segment, the ductility of the side chain in a slurry solution is increased, the thickness of an adsorption layer of the water reducing agent on the surface of cement particles is increased, and the water reducing agent has high dispersity; an electrified monomer with a flexible chain segment is used as an adsorption unit of water reducing agent molecules, the effect of adsorption base embedding caused by curling and folding of a polymer chain segment is avoided, the electrostatic adsorption effect of the water reducing agent molecules on the surfaces of cement particles is effectively enhanced, the cement adaptability is improved, and the sensitivity is reduced.

The present invention belongs to the technical field of preparation of water reducers, and the present invention discloses a low-temperature early-strength water reducer and a preparation method thereof. The present invention obtains a polyester macromonomer by first subjecting the monomer obtained by amidation reaction and esterification reaction to Michael addition reaction, and then undergoes free radical polymerization reaction with polyether macromonomer, carboxylic acid small monomer and sulfonic acid small monomer, and then sequentially undergoes functional modification by Hofmann degradation reaction and amidation reaction, and then undergoes Thiol-ene reaction with thiolated trehalose to synthesize a low-temperature early-strength water reducer. The low-temperature early-strength water reducer prepared by the present invention has the advantage of maintaining good dispersibility under low-temperature conditions, and the synthesis process is controllable, energy-saving and environmentally friendly, and can be effectively used in the field of concrete to solve the problems of poor concrete working performance and slow early strength development under low-temperature conditions, and has broad application prospects.

The invention discloses an isolator for establishing a bone nonunion animal model and a preparation method of the isolator, and relates to the technical field of medical instruments, and the preparation method comprises the following steps: step 1, obtaining a hydrogen-containing silicone oil prepolymer with a side chain containing Si-H bonds; 2, obtaining a silica gel macromonomer with an epoxy group on a side chain; step 3, obtaining an anti-inflammatory functionalized silica gel macromonomer; 4, reconstructing the skeleton model in a three-dimensional manner, and creating a defect isolator model; 5, adding the anti-inflammatory functionalized silica gel macromonomer obtained in the step 3 and a reactive diluent into a mixing tank, adding a cross-linking agent and polyether modified polydimethylsiloxane under mechanical stirring, stirring for 30 minutes, defoaming for 2 hours under 500Pa vacuum, and standing and curing in a darkroom after defoaming; and 6, a multi-material-box DLP photocuring 3D printer is adopted for isolator printing. According to the method, observation interference on the bone nonunion pathological process is fundamentally reduced, and high-fidelity modeling construction is achieved.

The invention relates to the field of concrete, and particularly discloses a steam-curing-free early strength agent for sleeper concrete and a preparation method thereof.The steam-curing-free early strength agent for sleeper concrete is prepared from a polymeric macromonomer, a polymeric micromonomer and a functional micromonomer according to the molar ratio of 1: (3.5-4): (0.4-0.7), the polymeric macromonomer comprises one or more of TPEG, EPEG and HEPG, the polymeric micromonomer comprises acrylic acid, sodium methallyl sulfonate, hydroxyethyl acrylate and butyl acrylate, the acid-ester ratio in the polymeric micromonomer is (3-4): (6-7), and the functional micromonomer is prepared from cellulose and maleic anhydride. According to the steam-curing-free early strength agent, the 3d compressive strength of concrete can be improved by 129.6% or above, the 28d compressive strength of the concrete can be improved by 75.8% or above, the concrete has good early strength and durability, and the competitive advantages of sleeper concrete in the field of sleepers are improved.

The invention discloses a high-refractive-index-difference bottle brush block polymer and a synthetic method of a degradable structural color material, and belongs to the technical field of organic polymers. The end group of the high-refractive-index degradable macromonomer is a cycloolefin derivative capable of performing sequential ring-opening metathesis polymerization reaction (ROMP), and the main chain is a degradable polymer prepared by performing ring-opening copolymerization reaction on styrene oxide (SO) and a comonomer. A series of novel degradable cycloolefin macromonomers are designed and synthesized to replace polystyrene and other non-degradable high-refractive-index polymers commonly used in the field, and the macromonomers and a block copolymer brush are synthesized through ring-opening polymerization and ring-opening metathesis polymerization. And an environment-friendly structural color material capable of covering a full visible light wave band is further prepared by utilizing a phase separation mechanism.

The purpose of the present invention is to provide an intermediate compound for providing a silicone macromonomer in which a (meth) acrylic group is introduced at a high ratio at both ends and a quaternary ammonium cation site is contained in the molecular chain. Specifically disclosed is an organopolysiloxane which is represented by general formula (1) and has a tertiary amino group in the molecular chain. (In general formula (1), each R independently represents a group selected from the group consisting of an alkyl group having 1-10 carbon atoms, an aryl group having 6-10 carbon atoms, and an aralkyl group having 7-10 carbon atoms, each R1 independently represents a group selected from the group consisting of an alkyl group having 1-10 carbon atoms, an aryl group having 6-10 carbon atoms, and an aralkyl group having 7-10 carbon atoms, and each R2 represents a group selected from the group consisting of an alkyl group having 1-10 carbon atoms, an aryl group having 6-10 carbon atoms, and an aralkyl group having 7-10 carbon atoms. Q1 and Q2 are each independently a hydrogen atom or a group represented by formula (2) (where at least one of Q1 and Q2 is a hydrogen atom, a is an integer of 1-400, and b is an integer of 1-50) (in formula (2), R1 is a group selected from the group consisting of an alkyl group having 1-10 carbon atoms, an aryl group having 6-10 carbon atoms, and an aralkyl group having 7-10 carbon atoms).

The invention discloses a mechanical tough light-heat dual-curing bio-based coating and a use method thereof. The coating comprises a cellulose macromonomer grafted with double bonds, a castor oil-based monomer containing steric hindrance urea bonds, a diluent, a photoinitiator and diisocyanate. The application method comprises the following steps: mixing the materials, coating the surface of a base material with the mixed materials, curing under ultraviolet light, and then carrying out thermocuring. The castor oil is subjected to chemical modification to introduce steric hindrance urea bonds and chain-end double bonds, and the castor oil, the cellulose macromonomer grafted with the double bonds, the diluent, the photoinitiator and the diisocyanate are subjected to photo-thermal dual curing to form a coating on the surface of a base material, so that the mechanical strength of the coating is remarkably improved.

The invention belongs to the field of concrete admixtures, and particularly relates to a viscosity reduction type water reducer as well as a preparation method and application thereof. The viscosity reduction type water reducer contains a monomer A structural unit, a monomer B structural unit, an ether macromonomer structural unit and an unsaturated acid structural unit. The viscosity reduction type water reducing agent provided by the invention has the advantages of good viscosity reduction effect and good wrapping property and softness on concrete slurry under the condition of low cement consumption, and has a wide application prospect.