164 results about "Latex particle" patented technology

The invention discloses reactive compatible ACR-PHA core-shell latex and application thereof, and belongs to the field of polymer chemistry and material science. The latex comprises composite particles with core-shell, gradient core-shell, raspberry-shaped or Janus heterostructure, interfaces of ACR phase and PHA phase of the latex are connected through covalent bonds, and the compatibility problem of physical blending is fundamentally solved. The latex particles have a Z-average particle size of 80-400 nm, a PDI of less than or equal to 0.30, and a minimum film formation temperature (MFFT) of-10 to 12 DEG C. The coating prepared by the invention has excellent high-humidity barrier stability (WVTR is less than or equal to 65g / m.d), low-temperature rapid heat sealability, water resistance, oil resistance and complete recoverability, does not contain PFAS, is an ideal alternative scheme of a traditional PE (Polyethylene) spraying film, and is suitable for the fields of food packaging paper, paper cups, bowls and the like.

The present invention provides a water-based binder for nanocellulose-based secondary battery electrode, comprising:a latex particle with a core-shell structure comprising: a core containing a rubbery polymer; and a shell formed by combining one or two monomers selected from the group consisting of an acryl-based monomer and a non-acryl-based monomer on the surface of the core through a chemical reaction; anda nanocellulose interacts with a functional group of the shell surface.

The invention relates to MXene / CNTs self-assembled conductive rubber and a preparation method thereof, and belongs to the technical field of conductive rubber. Through treatment, the CNTs have positive electricity and can be subjected to electrostatic self-assembly with MXene with negative electricity, the assembled conductive filler can be further assembled with latex particles of rubber through electrostatic interaction, the conductive filler and the latex particles are gelatinized together to prepare conductive rubber, and the conductive functional filler can form a good conductive network in a rubber matrix, so that the conductivity of the conductive rubber is improved. Therefore, the sensitivity, the stability and the durability of the conductive rubber are improved.

The invention discloses polybutadiene latex, a preparation method thereof and transparent ABS (Acrylonitrile Butadiene Styrene) resin. In the preparation process of the polybutadiene latex, the emulsifier is additionally added at a relatively high conversion rate to promote the reaction to generate part of latex particles with small particle sizes. When the latex prepared by the method is used for further preparing the transparent ABS resin, since the latex with the particle size of 30-70nm has a rayleigh scattering effect to a certain extent, a small amount of blue light can be scattered, so that the yellow index of the resin is reduced, and the prepared transparent ABS has better hue.

The invention provides a high-solid-content styrene-butadiene latex synthesis process which comprises the following steps: (1) mixing and shearing butadiene, styrene, vinyl amide and a polyfunctional group crosslinking monomer to prepare a mixed monomer; (2) adding deionized water, an emulsifier and a mixed monomer accounting for 30-60% of the total weight into the reaction kettle, vacuumizing, adding an initiator at the temperature of 5-15 DEG C, reacting for 1-1.5 hours, dropwise adding the rest of the mixed monomer for 6-10 hours, and after dropwise adding, carrying out polymerization reaction at the temperature of 40-60 DEG C for 3-4 hours to obtain the low-solid-content styrene-butadiene latex; and (3) adding an auxiliary agent inorganic salt and an organic concentrating agent into the low-solid-content styrene-butadiene latex, carrying out flash evaporation, and treating by a stripping tower to obtain the high-solid-content styrene-butadiene latex. While the solid content of the latex is increased, the viscosity of polymer emulsion, the size of latex particles, the particle size interval distribution and the like can be effectively controlled.

The invention discloses a waterborne polyurethane-urea dispersion with high brushing property as well as a preparation method and application of the waterborne polyurethane-urea dispersion. According to the waterborne polyurethane-urea dispersion, more hydrophilic ion groups are enriched to the surfaces of latex particles by controlling reaction sites of an amine compound with hydrophilicity or hydrophilic potential and an isocyanate group, and fatty alcohol-polyoxyethylene ether with a specific structure is matched. The waterborne polyurethane-urea dispersion prepared by the preparation method disclosed by the invention is excellent in brushing performance, and can be applied to the field of adhesives, and other properties are slightly influenced.

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.

The invention relates to a low-VOCs acrylic resin water-based coating and a preparation method thereof, and belongs to the technical field of high polymer materials and chemical coatings, the low-VOCs acrylic resin water-based coating comprises the following raw materials by weight: 40-80 parts of a modified acrylic resin emulsion, 0-30 parts of a pigment filler, 1-5 parts of a water-based auxiliary agent, 10-30 parts of deionized water and 0.5-2 parts of a post-addition cross-linking agent; the modified acrylic resin emulsion is prepared from a core-layer monomer mixture and a shell-layer monomer mixture through a core-shell emulsion polymerization process, and the shell-layer monomer mixture comprises a functionalized internal plasticizing monomer and a self-crosslinking functional monomer. The monomer is prepared by reacting long-chain fatty alcohol with diisocyanate to prepare an isocyanate-terminated prepolymer and then grafting the isocyanate-terminated prepolymer with a hydroxyl-containing acrylic monomer, a long-chain alkyl structure provided by the long-chain fatty alcohol plays a remarkable internal plasticizing role on the surfaces of latex particles, and the friction force between polymer chain segments is effectively reduced.

The present application relates to a kind of fischer-tropsch wax emulsion and its preparation method, belong to wax emulsion technical field.The fischer-tropsch wax emulsion of the present application is mainly composed of water, fischer-tropsch wax, fatty alcohol polyoxyethylene ether, isomeric alcohol polyoxyethylene ether, fatty acid emulsifier and triethanolamine.The fischer-tropsch wax emulsion of the present application uses fatty alcohol polyoxyethylene ether and isomeric alcohol polyoxyethylene ether as main emulsifier, uses fatty acid emulsifier and triethanolamine as auxiliary emulsifier, main emulsifier and auxiliary emulsifier are all environmentally friendly emulsifier, in line with the green environmental protection concept advocated now.In addition, the fischer-tropsch wax emulsion of the present application has good stability, the latex particle size in emulsion is smaller, can expand the application range of fischer-tropsch wax, and has good use convenience.The fischer-tropsch wax emulsion of the present application has faster drying speed when being used for preparing wax film.

The present invention relates to an aqueous binder for a secondary battery electrode and the use thereof, and belongs to the technical field of battery binders. The technical problem to be solved by the present invention is to provide an aqueous binder for a secondary battery electrode having both flexibility and adhesion performance. The binder comprises a graft polymer, having an acrylonitrile polymer as a main chain, which is grafted with acrylate latex particles, wherein the polymerization monomer of the acrylonitrile polymer comprises an acrylonitrile monomer and an acrylic monomer; and the polymerization monomer of the acrylate latex particles comprises a crosslinking monomer and a non-crosslinking monomer. The aqueous binder of the present invention has good flexibility and high adhesion performance to positive and negative electrodes. Therefore, it can be used in a positive electrode sheet or a negative electrode sheet of a secondary battery, effectively reducing the thickness rebound rate of the electrode sheet after being rolled and leaving to stand for 24 h, and improving the performance of the battery. Furthermore, the aqueous binder is environmentally friendly and has a simple preparation process. Therefore, large-scale and continuous production can be achieved, further reducing production costs and improving production efficiency.

The invention provides a degradable latex catheter material and a production process thereof, and relates to the technical field of medical implant materials, the production process comprises the following steps: S1, placing an activator in a sodium alginate solution to obtain an activated sodium alginate solution; s2, activating the latex particles to obtain activated latex particles; s3, the antibacterial agent and the activated latex particles are placed in the activated sodium alginate solution for a grafting reaction, and the degradable latex catheter material is obtained. According to the preparation method, sodium alginate and latex particles are subjected to activating treatment, so that efficient grafting of sodium alginate molecules on the surfaces of the latex particles is realized, the degradability of the latex particles is remarkably improved, and the antibacterial property of the latex particles is remarkably enhanced by further introducing an antibacterial agent.

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 invention discloses an oil-proof acrylic emulsion, which belongs to the technical field of acrylic emulsion, and the oil-proof acrylic emulsion is prepared from the following raw materials: water, styrene, butyl acrylate, acrylic acid long-chain ester, carboxyl functional monomer, hydroxyl functional monomer and crosslinking monomer. The butyl acrylate and styrene are compounded, so that the film-forming property of the oil-proof acrylic emulsion is improved, a compact coating is quickly formed after the oil-proof acrylic emulsion is coated on low-gram-weight paper, oil permeation is prevented, and the oil-proof property of the paper is enhanced; by utilizing the characteristic that the hydroxyl cross-linking monomer can react with the cross-linking monomer, the monomer polymer can further form a compact net-shaped structure, so that the oil-proof performance of the oil-proof coating is improved, and the problems of high-temperature after-tack and rolling adhesion are avoided. Besides, large-particle-size latex particles are synthesized by adopting a reactive emulsifier system, and are matched with acrylic acid long-chain ester, so that the permeation of emulsion colloidal particles is reduced, and an excellent protective coating is ensured to be formed on the surface of the paper.

The utility model relates to the technical field of underwear, and discloses an underwear capable of preventing shoulder straps from slipping, which comprises an underwear body, side wings connected to the left and right ends of the back of the underwear body, straps connected to the backs of the side wings, shoulder straps connected to the tops of the side wings, silica gel pads arranged at the top ends of the inner surfaces of the shoulder straps, soft gaskets fixedly mounted at the inner ends of the side wings through sewing, and anti-slip pads adhered to the surfaces of the gaskets. The non-slip mat is provided with latex particle embossed patterns with granular or wave-shaped textures, and the two are formed by hot pressing; the straps are connected through the back fixing straps and adjustable fixing buckles, the shoulder straps are made of high-elasticity breathable materials, the underwear, the side wings and the straps are all made of light and thin elastic fabric, the silicone pads increase friction force between the shoulder straps and the shoulders to prevent sliding, the latex particle embossments are matched with the anti-sliding pads to fix the side wings to prevent the underwear from shifting, the anti-sliding assemblies are detachable, and the straps are adjustable in tightness. Through structure optimization, material selection and detail design, the underwear solves the problem of slipping of the shoulder straps, and improves wearing comfort and stability.

The present invention provides an antibacterial and anti-sticking latex catheter and a preparation method thereof, which relates to the technical field of medical implant materials. The method comprises the following steps: S1: placing vinyl pyrrolidone, an unsaturated carboxylic acid monomer, and an initiator in a first solvent to obtain polyvinyl pyrrolidone with a carboxyl side chain; S2: placing the polyvinyl pyrrolidone with a carboxyl side chain, an activator, and a catalyst in a second solvent to obtain activated polyvinyl pyrrolidone; S3: placing the antibacterial agent and the activated polyvinyl pyrrolidone in a third solvent to obtain quaternary ammonium salt group-grafted polyvinyl pyrrolidone; S4: performing an activation treatment on latex particles to obtain activated latex particles; S5: placing the quaternary ammonium salt group-grafted polyvinyl pyrrolidone and the activated latex particles in a fourth solvent to obtain antibacterial and anti-sticking latex particles; and S6: melting and extruding the antibacterial and anti-sticking latex particles to form an antibacterial and anti-sticking latex catheter. The hydrophilicity and antibacterial properties of the latex catheter are effectively improved.

The application discloses a kind of powder rubber conductive material by electrochemical exfoliation graphene promotes condensation and preparation method thereof, it is related to powder rubber preparation technical field, to solve the problem that existing method is not simple enough, product performance needs to be promoted;The application includes that anode piece is placed in electrolyte, through anodic electrolysis graphite material, while generating graphene, slowly add rubber emulsion, at this time, the graphene that anode is electrolyzed is combined with latex particle, and promotes condensation process in electrolyte, then after separation, washing, drying, obtain powder rubber;The application realizes electrochemical exfoliation graphene promoting condensation effect synchronously in electrolysis process, obtains conductive powder rubber, step is simple and easy to operate, and the powder rubber prepared has small particle size size and high powder rate, and particle is not easy to stick between, and dispersibility is good, and conductive performance is excellent.

A process for preparing a modified latex particle wherein the particle comprises a polycondensate bonded to a functional group on the latex particle and the process for forming a polycondensate comprises reacting an amino group present on the latex particle with (i) at least a first polyfunctional compound, or (ii) at least a first multifunctional compound having at least two functional groups that react with said functional groups of the latex, and at least a first amine compound comprising an amino group selected from the group consisting of ammonia, primary amines and secondary amines, or (ii) at least a second multifunctional compound having at least two functional groups that react with said functional groups of the latex, and at least a second amine compound comprising an amino group selected from the group consisting of ammonia, primary amines and secondary amines, to form a first polycondensate reaction product comprising ion exchange sites and a first unreacted excess of functional groups.

1. A method for producing modified latex particles, the particles comprising condensation polymers attached to functional groups on the latex particles, and the method for forming the condensation polymer comprises reacting amino groups present on the latex particles with either (i) at least a first multifunctional compound having at least two functional moieties reactive with the functional groups of the latex, or (ii) at least a first multifunctional compound having at least two functional moieties reactive with the functional groups of the latex, and at least a first amine compound comprising an amino group selected from the group consisting of ammonia, primary, and secondary amines, to form a first condensation polymer reaction product comprising ion exchange sites and a first excess of unreacted functional moieties.

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.

To provide a technique for accurately measuring a measurement target substance in a sample with high sensitivity when making measurement using a latex immunoagglutination method.SOLUTION: A method of measuring a measurement target substance in a sample using a latex immunoagglutination method is provided, the method comprising bringing the sample into contact with latex particles carrying an antibody that specifically recognizes the measurement target substance in an aqueous medium under the presence of (A) a glycine-based buffer, (B) dipropylene glycol or a derivative thereof, and (C) salts.SELECTED DRAWING: None

The invention discloses a seamless woven garment and a weaving method thereof, and belongs to the technical field of woven garments. The seamless woven garment is formed by compounding a seamless woven inner layer and an air layer; the yarns are formed by blending cotton fibers, chinlon, corn polylactic acid fibers, polyvinyl alcohol fibers and silk; the air layer comprises a plurality of fabric layers, latex particles located between the adjacent fabric layers and a hot-pressing composite adhesive layer; the latex particles are uniformly dispersed in the hot-pressing composite adhesive in advance, then the hot-pressing composite adhesive is coated between the adjacent fabric layers, then the fabric layers are subjected to hot-pressing compounding through hot-pressing equipment, and the operation is repeated for multiple times, so that a multi-layer fabric composite layer is obtained, and an air layer is formed. By means of the mode, the obtained seamless woven clothes have the advantages of being good in heat retention property, air permeability and moisture permeability and the like, and when the sweat of the human body is much, the clothes can rapidly absorb sweat and dissipate heat and are high in comfort degree.

The present invention relates to a method of producing latex particles or a latex particle dispersion, a latex particle or a latex particle dispersion produced by the method, the use of the latex particle or latex particle dispersion in a printing ink, a printing ink comprising the latex particle or latex particle dispersion, and a printing method wherein the latex particles are used.

The present invention relates to the technical field of functional natural rubber composite materials, and in particular to a simplified method for judging the reinforcing effect and efficiency of a filler on natural rubber based on the particle size of a combined rubber particle formed by a filler and natural latex. The natural rubber latex and the filler are uniformly mixed to obtain a test solution, and then an instrument is used to test to obtain an average particle size of the rubber particles, and the filler is judged to have a reinforcing effect on natural rubber based on the ratio of the value to the particle size of pure natural latex particles of the same concentration without the filler. Further, based on the established functional relationship, the tensile stress of the filler / natural rubber vulcanizate prepared by various corresponding processes is derived, and the reinforcing efficiency of the filler on natural rubber is quantitatively evaluated. The present invention can quickly and accurately judge the reinforcing effect and efficiency of the filler on natural rubber. On the one hand, it provides a scientific, accurate, fast and efficient evaluation method for the modification effect of the filler; on the other hand, it can lay a foundation for the scientific, accurate, fast and efficient optimization of rubber formulas.

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.

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.

The invention relates to a composite nano fireproof material, a fireproof pre-reaction solution and a preparation method and application thereof, and the composite nano fireproof material is prepared from organic nanoparticles and organic / inorganic hybrid nanoparticles; in the organic nanoparticles, a core layer is cross-linked polyacrylamide emulsion particles, a bridging layer is prepared from diisocyanate bridging molecules, a branching layer is linear hydroxyl cellulose, the branching layer is arranged on the outer side of the bridging layer, and the core layer is wrapped with the bridging layer; in the organic / inorganic hybrid nanoparticles, a core layer is a SiO2 emulsion particle containing amino and formaldehyde groups, a transition layer is a copolymer layer which has a cross-linked network structure and contains melamine formaldehyde / phosphorus-containing polymer, and a shell layer is a copolymer layer of which the surface is grafted with linear glycidyl methacrylate. According to the invention, the defect that a fireproof layer material in the prior art cannot meet the ultraviolet test is overcome, and the defects of bubbles, gummosis, blackening, low material hardness, poor low temperature resistance and the like of the fireproof layer are avoided.

The present invention belongs to the field of coating technology, and particularly relates to a reflective heat-insulating coating, a preparation method thereof, and an application thereof. The reflective heat-insulating coating of the present invention comprises hollow acrylic emulsion A, hollow acrylic emulsion B, hollow acrylic emulsion C, and elastic acrylic emulsion; the latex particles in hollow acrylic emulsion A, hollow acrylic emulsion B, and hollow acrylic emulsion C are all hollow microspheres; the ratio of the thickness of the shell layer of the hollow microspheres to the particle size of the hollow microspheres is (9-33):100; the particle sizes of the latex particles in hollow acrylic emulsion A, hollow acrylic emulsion B, and hollow acrylic emulsion C are 450-750nm, 900-1300nm, and 1400-1800nm, respectively. The present invention adopts three hollow acrylic emulsions of different particle sizes to compound, and the hollow microspheres of different sizes have a synergistic effect, which is beneficial to improving the reflective heat-insulating performance, mechanical properties, stain resistance, and weather resistance of the coating.

The invention relates to the technical field of waterborne polyurethane emulsions, and particularly provides a coagulant-free waterborne polyurethane emulsion for impregnation labor protection appliances and a preparation method. The waterborne polyurethane emulsion comprises polyol, diisocyanate, a carboxyl-containing diol compound, a neutralizer, a chain extender, a nano filler and water. According to the waterborne polyurethane emulsion provided by the invention, polyol and diisocyanate are pre-polymerized to obtain a prepolymer, carboxyl-containing diol is adopted as an internal emulsification monomer, and an internal emulsification system is formed through neutralization to realize self-dispersion; the chain extender and the nano filler are supplemented to form a stable emulsion particle system, so that gelation and phase separation in the storage process are remarkably avoided; the nano filler and chain extension regulation enable the coating to have improved modulus, wear resistance and thermal and chemical stability.

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.