19 results about "Latex particle" patented technology

The application discloses a kind of integrated robot latex particle automatic ultrasonic dispersion equipment, including rack, quick-change head device, workpiece fixture rack, ultrasonic water bath and robot;Workpiece fixture rack is equipped with transfer clamp and placement slot, and the movable end of robot is equipped with clamp joint;Robot can drive clamp joint to butt joint or release quick-change head device, and drive quick-change head device to carry out secondary pressing positioning to sample bottle in placement slot;Robot can drive clamp joint to butt joint or release the transfer clamp of workpiece fixture rack, and robot can drive workpiece fixture rack and sample bottle thereon to carry out multidimensional composite motion in ultrasonic water bath.The equipment can realize the semi-automatic linkage operation of "feeding-positioning-ultrasonic dispersion-discharging", reduce manual intervention, guarantee the stability and consistency of latex particle dispersion in sample bottle in large-scale mass production process, significantly improve production efficiency and product quality, and provide key technical support for process upgrading of in-vitro diagnosis industry.

This application provides a backing adhesive collection device for coconut fiber mat production, relating to the field of coconut fiber mat production technology. It includes a collection box with suction pipes and exhaust pipes connected to both sides of the top. A fan connected to the exhaust pipes is also installed on the top of the collection box. Several annular conveying pipes are installed inside the collection box, each with several nozzles connected to its inner side. This application utilizes the interaction of the fan and exhaust pipes to create a negative pressure environment within the collection box. Using the principle of negative pressure adsorption, the adhesive mist diffused during the adhesive spraying process is drawn into the collection box through the suction pipes. Water is then conveyed to the annular conveying pipes by the conveyor components, and the water is sprayed out from the nozzles to form a water curtain. When the adhesive mist enters the collection box, it comes into full contact with the water curtain, and the latex in the adhesive mist is adsorbed by the water curtain, achieving the recovery of latex particles and reducing resource waste, environmental pollution, and impact on worker health.

The application discloses a kind of preparation method and system of butadiene-styrene latex using emulsion coagulant modification, belong to high polymer material and synthetic rubber technical field.The application includes: the solution containing lactone compound, linear polymer with upper critical solution temperature is mixed with butadiene-styrene latex, and homogeneous premix system is formed;Under preset temperature condition, the hydrolysis reaction of the lactone compound in the homogeneous premix system is carried out, and the pH value of system drops;When the pH value of the system drops to the isoelectric point of the linear polymer, the dissolution state of the linear polymer under the preset temperature changes from hydrophilic extended conformation to hydrophobic collapse conformation, so as to coalesce latex particles in the butadiene-styrene latex.The application realizes the separation of coagulation reaction and mixing process in time, effectively inhibits the problem of local concentration polarization caused by glue deposition and particle size distribution widening, and the obtained rubber particle is uniform in size and excellent in mechanical property, suitable for industrial production.

The utility model provides a kind of new portable mattress, including outer cladding, filling layer, the inside filling of outer cladding is filled with filling layer, the edge of outer cladding top surface, bottom surface is fixedly connected with edge covering, the top surface of outer cladding is fixedly connected with several softness protrusions.The utility model has the advantages that: every filling piece adopts the TPU honeycomb frame of wall thickness 1.2mm, cooperate the negative oxygen ion latex particle filling (porosity 40%) of diameter 3-5mm, form independent unit with supporting and flexibility.The test shows that the weight of single unit is greatly reduced compared with traditional sponge.Elastic dynamic connection system: the whole is formed by polyurethane elastic connecting band 7 between units, and the breaking elongation is >500%, realizing the dynamic support of pressure self-adaption.The mattress realizes lightweight breakthrough: the whole bed weight is lighter, greatly reduced compared with traditional product, single person can easily carry, dynamic support: body pressure distribution uniformity, waist support force is greatly improved compared with traditional product.

This invention relates to a fully matte, high-transparency topcoat varnish for interior wall textured coatings, its preparation method, and its application. The fully matte, high-transparency topcoat varnish comprises: an emulsion, a multifunctional additive, a thickener, a defoamer, a pH adjuster, a film-forming aid, an antifreeze agent, a dry film antifungal and anti-algae agent, a bactericide, and water. The emulsion is a silicone-modified pure acrylic mixed emulsion with a solid content of 36±1%, comprising coarse-particle-size emulsion and fine-particle-size emulsion. This invention utilizes two or more latex particles of different sizes to achieve an uneven surface on the paint film during film formation, thus achieving a matte effect. The prepared matte varnishes can reduce the risk of paint delamination and the potential for inconsistent gloss during use. Water resistance and storage performance are also significantly improved, greatly expanding its application in water-based multicolor coatings and interior wall art coatings.

The present application belongs to the technical field of artificial turf. Disclosed are an adhesive composition for artificial turf, artificial turf and preparation methods therefor. The adhesive composition for artificial turf comprises the following components by mass percentages: 10-50% of an ethylene-vinyl acetate copolymer emulsion in which the average particle size of latex particles is less than 3 μm; 5-40% of a functional resin emulsion in which the average particle size of latex particles is less than 3 μm; 0.1-10% of a surfactant; and 0-80% of an inorganic filler. The composition is an aqueous system, the requirement for the environment is low during a gum production process, a gum-coated turf bottom side has a good bonding strength, and the bonding strength of an inner single grass yarn, which is the most difficult to permeate, of the artificial turf is still kept well in a high-temperature and high-humidity environment after hot water aging.

This utility model discloses a repolymerization reaction device for latex in slim cigarette packaging, relating to the field of latex production technology. The utility model includes a stirring assembly, a preheating assembly on its outer surface, a filtering assembly inside the preheating assembly, and an adjusting assembly on the outer surface of the filtering assembly. The stirring assembly is used to disperse latex particles, the preheating assembly is used to preheat the recovered latex, the filtering assembly is used to filter impurities in the latex, and the adjusting assembly is used to adjust the filtration size of the filtering assembly. Through the connection of the preheating assembly and the filtering assembly, with the filtering assembly located inside the preheating assembly, the expired latex is poured into the preheating assembly for heating, increasing the latex's fluidity and facilitating its passage through the filtering assembly. Because contaminants in the latex are larger than the pore size of the filtering assembly, the contaminants remain on the surface of the filtering assembly, preventing them from entering the stirring assembly with the latex.

This invention discloses a narrow-distribution functionalized aqueous latex and its preparation method, belonging to the field of aqueous latex preparation technology. The latex uses functionalized monomers, aromatic vinyl monomers, and aliphatic conjugated diene monomers as main raw materials, introduces silane coupling agent-modified cellulose nanocrystals, and combines them with an initiator, emulsifier, and water, undergoing one-step emulsion polymerization. The modified cellulose nanocrystals can form a physical barrier on the surface of the latex particles, reducing the content of embedded acid and free acid in the aqueous phase, and increasing the surface carboxyl group density; its rigid structure forms a three-dimensional network after film formation, effectively suppressing the volume expansion of the silicon anode. The resulting latex has a particle size of 245~255nm, a narrow particle size distribution, moderate viscosity, and high bonding strength. When used as a lithium battery anode binder, it exhibits high electrode peel strength, good slurry dispersibility, and excellent battery cycle stability. This invention features a simple process, readily available raw materials, and easy industrial scale-up, making it suitable for lithium battery anode binders, paper coating, and aqueous adhesives.

A method for making modified latex particles, wherein the particles comprise condensation polymers bonded to functional groups on the latex particles and the method for forming the condensation polymer comprises reacting the amino groups present on the latex particles with (i) at least a first polyfunctional compound, having at least two functional moieties reactive with said functional groups of the latex, or (ii) at least a first polyfunctional compound, having at least two functional moieties reactive with said functional groups of the latex and at least a first amine compound, comprising amino groups selected from the group consisting of ammonia, a primary and a secondary amine to form a first condensation polymer reaction product comprising ion exchanging sites and a first unreacted excess of functional moieties.

This invention belongs to the field of emulsion polymerization technology, specifically relating to a method for preparing coagulation-dispersion controllable emulsions based on acrylic macromolecular emulsifiers. The method utilizes acrylic macromolecular emulsifiers in a free radical emulsion polymerization process, covalently binding hydrophilic acrylic acid segments to the surface of latex particles. The coagulation and dispersion states of the emulsion prepared by this method are easily controlled by the pH value of the emulsion system. The control process is reversible and rapid. After a coagulation-dispersion cycle, the particle size and particle size distribution of the latex particles are essentially consistent with the initial emulsion. This method can significantly shorten the preparation cycle of high-solids-content emulsion polymerization, providing an effective approach for expanding the preparation and application of water-dispersible polymers.

The application discloses a preparation method of epoxidized styrene-butadiene latex and epoxidized styrene-butadiene rubber and relates to the technical field of styrene-butadiene rubber epoxidation.The preparation method of the epoxidized styrene-butadiene latex uses a sulfonic acid type emulsifier and a non-ionic emulsifier as stabilizers of the styrene-butadiene latex.It is found for the first time that the use of the sulfonic acid type emulsifier and the non-ionic emulsifier as the stabilizers can not only improve the epoxidation rate of the styrene-butadiene rubber but also maintain the stability of the latex system in the process of synthesizing the epoxidized styrene-butadiene rubber.The sulfonic acid type emulsifier as an acidic surfactant can act as a catalyst in the latex epoxidation process, improve the generation efficiency and reaction rate of peroxyformic acid on the surface of the latex particles and rapidly prepare the epoxidized styrene-butadiene rubber.

This invention relates to the field of rubber preparation, specifically to a method for preparing a lignin / rubber nanocomposite masterbatch and its product. The invention involves epoxidizing rubber latex to obtain epoxidized rubber latex, then dynamically mixing the obtained epoxidized rubber latex with lignin slurry. At high speed, the lignin adsorbs onto the epoxidized rubber latex particles, resulting in self-flocculation to obtain the lignin / rubber nanocomposite masterbatch. The lignin exhibits good dispersibility in the lignin / rubber nanocomposite masterbatch, significantly reducing stress defects and improving mechanical properties.

The invention discloses a preparation method of a self-crosslinking acrylic emulsion with a long activation period, which comprises the following steps: pre-emulsifying a part of soft monomers, all hard monomers and a part of an emulsifier under a heating condition to obtain a hard-phase pre-emulsion; carrying out seed emulsion polymerization on the seed emulsion and a part of initiator solution in a reactor to form a hard-core seed emulsion; in the presence of the hard core seed emulsion, carrying out multi-stage gradient dropwise adding and copolymerization on the mixed monomer containing the ketone carbonyl functional monomer and the residual initiator solution, firstly dropwise adding the first-stage mixed solution enriched with the ketone carbonyl functional monomer, then dropwise adding the second-stage mixed solution, and carrying out polymerization to obtain the high-temperature-resistant high-temperature-resistant copolymer. A gradient functional intermediate layer with the keto-carbonyl concentration gradually decreased from inside to outside is constructed on the outer surface of the hard core, the third-stage mixed solution is immediately dropwise added into the system, polymerization reaction is conducted, and latex particle dispersion liquid of a hard core-functional intermediate layer-soft shell composite structure is obtained; and the key comprehensive performance of stable storage period and efficient cross-linking in the use period of the emulsion is balanced and realized on the molecular level.

This application relates to the field of flexible stretchable electrode technology, and discloses a high-performance stretchable electrode, its preparation method, and its application. The preparation method includes: dissolving a hyperbranched polymer containing functional groups in a solvent to obtain a hyperbranched polymer solution; dispersing latex in a solvent to obtain an emulsion; adding the hyperbranched polymer solution to a silver nanowire dispersion for reaction, and collecting the solid product; dispersing the solid product in the emulsion to obtain a silver nanowire / emulsion ink; coating the silver nanowire / emulsion ink onto a flexible substrate, and performing demulsification treatment to obtain the high-performance stretchable electrode. In the stretchable electrode of this application, latex particles construct a continuous elastic network, tightly wrapping and embedding at the junctions of the silver nanowire network, forming a network structure that is both stretchable and highly conductive, exhibiting excellent electrical properties and cycle stability. Its tensile strain exceeds 500%, and at 100% tensile strain, the R / R0 is only 2.3; at 40% strain, it can withstand more than 10,000 tensile cycles.

The application relates to the field of emulsion polymerization and discloses a polyvinyl acetate emulsion, characterized in that the polyvinyl acetate emulsion comprises latex particles and an emulsifier; the latex particles are polyvinyl acetate, and the emulsifier is polyvinyl alcohol; the polyvinyl alcohol comprises polyvinyl alcohol A and polyvinyl alcohol B; the polyvinyl alcohol A has a polymerization degree of 400-1000 and an alcoholysis degree of 83-88 mol%; and the polyvinyl alcohol B has a polymerization degree of 1500-2000 and an alcoholysis degree of 92-99 mol%. The polyvinyl acetate emulsion has excellent water resistance.

This invention provides a polymer emulsion. The polymer emulsion comprises a cross-linked latex particle core and a hydroxyl-containing shell coating the surface of the cross-linked latex particle core; wherein the glass transition temperature of the cross-linked latex particle core is -60℃ to -30℃, and the glass transition temperature of the hydroxyl-containing shell is 30℃ to 70℃. The polymer emulsion provided by this invention exhibits excellent hardness and good impact resistance.

This application discloses a soap-free emulsion of styrene-conjugated diene copolymer, its preparation method, and its application, belonging to the field of polymer emulsion preparation technology. It consists of latex particles of styrene-conjugated diene copolymer ionomers and water; the surface of the ionomers is grafted with side groups; the side groups are sulfonates and / or carboxylates; the preparation method of the soap-free emulsion includes: taking an organic solution of styrene-conjugated diene copolymer, after carboxylation and / or sulfonation reactions, neutralizing it with an alkali metal or alkaline earth metal solution to obtain an ionomer solution, mixing it with water to form a polymer emulsion, and then removing the organic solvent and part of the deionized water by vacuum distillation to obtain the soap-free emulsion. The emulsion is pure, consisting only of water and SBS / SIS ionomers, and the entire preparation process does not require the addition of emulsifiers. This not only eliminates the complex post-processing steps required to separate clean particles from the latex but also avoids the generation of large amounts of wastewater containing emulsifiers.