58results about How to "Less residual monomer" patented technology

This invention relates to a core-shell polystyrene-acrylate copolymer emulsion, which comprises: emulsifiers 0.2-1.5 wt.%, monomers 45-55 wt.%, initiator 0.1-0.3 wt.%,, pH regulator 0.1-0.2 wt.%, and deionized water as balance. The emulsifiers are two or three of anionic emulsifier, nonionic emulsifier and functional allyloxy hydroxypropyl sulfonate emulsifier. The monomers are soft monomer, hard monomer and functional silane monomer containing epoxy groups and oxy groups. The solid content of the emulsion is 48-52%, the glass transition temperature of the core is 25-35 deg.C, and the glass transition temperature of the shell is (-5)-5 deg.C. The emulsion has such advantages as high wet adhesivness of the coating film and high washing resistance of the coating film.

The invention provides a thermal expansibility microsphere and a method for reducing residual monomers therein. The method comprises a re-initiation step of supplementing an initiating agent of the residual monomers in a process of preparing the thermal expansibility microsphere by using a suspension polymerization method, wherein the initiating agent of the residual monomers is an oxidation reduction initiator system. The preparation method of the thermal expansibility microsphere, provided by the invention comprises the following steps: preparation of a water phase, preparation of an oil phase, suspension polymerization and residual monomer reduction. The technical scheme provided by the invention realizes quick reduction of the residual monomers under a low-temperature condition, is simple in production process, low in consumption and short in processing time, and simultaneously can efficiently reduce the content of the residual monomers in the thermal expansibility microsphere and a suspension reaction medium. The thermal expansibility microsphere prepared by using the method contains a little number of residual monomers and is small in pollution.

The invention discloses a preparation method of amphoteric polyacrylamide dispersion liquid. The preparation method comprises the following steps: putting a main functional monomer into a mixed system comprising an amphoteric dispersion stabilizer, a chelating agent, a pH regulator and inorganic salt deionized water solution; initiating a reaction by virtue of an initiating agent; and preparing the amphoteric polyacrylamide dispersion liquid by virtue of a dispersion polymerization method. The dispersion liquid prepared by adopting a novel amphoteric polymer dispersion stabilizer has the characteristics of good stability, high molecular weight, high dissolution rate and the like, and a synthetic process of the dispersion liquid is environment-friendly and pollution-free and is low in energy consumption, and the product is nontoxic and noncorrosive, cannot generate secondary pollution and accords with the development direction of green and environment-friendly chemical assistants. The amphoteric polyacrylamide dispersion liquid has an application prospect in the fields of water treatment, papermaking, printing and dyeing, oil fields, mining, daily chemicals and the like.

The invention discloses an acrylate copolymer emulsion, and belongs to the technical field of aqueous coatings. The acrylate copolymer emulsion comprises, by weight, 450-550 parts of deionized water, 1-2 parts of an anionic surfactant, 5-8 parts of a reactive emulsifier, 3-15 parts of hydroxypropyl acrylate, 50-160 parts of methyl methacrylate, 20-75 parts of butyl acrylate, 200-410 parts of styrene, 5-10 parts of methacrylic acid, 3-10 parts of an adhesion function monomer, 2-9 parts of a cross-linking monomer, 3-10 parts of a cross-linking agent, 0.1-3 parts of an antifoaming agent, 0.8-2 parts of an initiator, 3-5 parts of ammonia water, 0.8-2 parts of an antiseptic, 0.1-1 part of tert-butyl hydroperoxide and 0.1-0.8 parts of sodium bisulfate. The invention also discloses an aqueous industrial anticorrosive coating adopting the acrylate copolymer emulsion as a film forming substance. The coating has the advantages of high adhesion to a substrate, high water resistance and high salt spray resistance.

The invention discloses a making method of heat-proof ABS polymer through continuous bulk method, which comprises the following steps: inputting main material; inputting secondary material; grafting main material to transform phase; grafting the secondary material to transform phase; blending main material and secondary material; obtaining the product with swelling index at 9-15, rubber content at 14-16% and grain size at 1-2um; fitting for heat-proof modification and accessory manufacturing in the automobile domain.

The present invention features that the polynary copolymer is prepared with itaconic acid, sulfonate and acrylate and through water phase polymeriztion in the presence of initiator system. Relates to itaconic acid, the amount of sulfonate is 0-50 wt%, the acrylate 5-200 wt% and the initiator 0-30 wt%. The preparation process includes mixing itaconic acid and sulfonate to prepare water solution, and adding initiator solution and acrylate homogeneously for copolymerization reaction at 30-100 deg.c. The prepared polynary copolymer solution may be used as anti-sludging agent, scale remover, dispersant, detergent aid, etc. The production process is simple and has no 'three-waste' exhaust.

The invention discloses a tea polyphenol-acrylic acid series super absorbent resin. Acrylic acid is neutralized with a NaOH solution firstly; then N,N'-methylene bisacrylamide is taken as a cross-linking agent, potassium persulfate is taken as an initiator, and the mixture has a polymerization reaction with tea polyphenols in water; and gel obtained after the reaction is cooled, cut and dried, so that the tea polyphenol-acrylic acid series super absorbent resin is formed. The tea polyphenol-acrylic acid series super absorbent resin is a brownish yellow particle, has few residual monomers and no visible impurities, has sufficient gel strength, and has excellent water absorption, water retention and antibacterial properties; the water absorption rate can reach more than 950 times; and the tea polyphenol-acrylic acid series super absorbent resin is applicable to hygiene care supplies such as baby diapers, women's sanitary towels and the like. A preparation method of the tea polyphenol-acrylic acid series super absorbent resin is simple, raw material resources are extensive, the production cost is low, the production efficiency is high, and the resin has remarkable advantages.

The invention relates to an acrylate tile back glue emulsion and a preparation method thereof. The preparation method comprises preparation of a base material liquid A, preparation of a monomer solution B, preparation of an initiator solution C, preparation of a later added initiator solution D, pre-emulsification semi-continuous dropwise addtion, and later treatment processes. The emulsion comprises, by weight, 100 to 500 parts of an alkyl acrylate monomer, 20 to 100 parts of an alkyl methacrylate monomer, 0.1 to 10 parts of alkyl carboxylic acid, 1 to 10 parts of a functional monomer, 0.1 to 10 parts of vinyltrioxysilane, 1 to 30 parts of an emulsifier, 0.1 to 5 parts of an initiator, 0.1 to 5 parts of a buffering agent, and 100 to 150 parts of deionized water. The preparation method has the advantages of simple processes, low cost and safety. The emulsion has characteristics of good gloss, good water resistance, good weather resistance, high peel strength, high adhesion and instant-coating and instant-pasting of a single component.

The invention discloses a water-based flexographic printing ink for cigarette tipping paper printing and a preparation method thereof. The water-based flexographic printing ink is composed of a modified acrylic emulsion, pigment and filler, a wetting dispersant, a transfer printing agent, a defoaming agent, deionized water, and a cosolvent. The modified acrylic emulsion is a novel acrylic emulsion formed by copolymerization of an imported high quality emulsifier, acrylate and special functional monomers, and has the advantages of fantastic calcium ion stability, dilution stability, mechanical stability and freeze-thaw stability, and small pollution to the environment. The water-based flexographic printing ink for tipping paper printing provided by the invention is non-toxic and tasteless, has quick drying speed and good dispersion stability, the printing product is free of deformation and edge curling, and has bright color and excellent antibacterial properties. The printing product has few residual monomer and low odor, is green and environment-friendly, the printing ink can be used cooperatively with a flexographic press, the printing speed can reach 250-300m/min, and the machine speed is doubled than the traditional intagliotipping paper printing press, thus greatly improving the production efficiency, and saving the production cost.

The invention discloses a method of preparing polyacrylate super absorbent resin at a high temperature. The method comprises the following steps: adding a sodium hydroxide solution (50%) into an acrylic acid solution with a certain concentration to carry out neutralization reactions so as to obtain a neutral solution; when the temperature of the neutral solution is 50-90 DEG C, adding a crosslinking agent and other auxiliary agents into the neutral solution according to a certain ratio, carrying out reactions to obtain gel, wherein the final temperature of gelling reactions can reach 100-160 DEG C; grinding and extruding gel, drying, grinding, sieving, and finally carrying out secondary surface crosslinking to prepare the polyacrylate super absorbent resin. The heat of neutralization reactions is utilized, a crosslinking agent is added at a high temperature to carry out reactions, the energy consumption for cooling is reduced, and continuous production is guaranteed. Because the primary temperature of polymerization is high, the highest temperature of gelling reactions is high, a large amount of water is removed through evaporation, drying is promoted; the reaction time is short, the production efficiency is largely improved, the steps of nitrogen introducing and oxygen removing are not needed, and the production cost is reduced therefore.

The invention belongs to the field of polymer materials, and relates to a polyhydroxy hyperbranched polymer, a preparation method of the polymer and an application of the polymer in dental composite resin. The polyhydroxy hyperbranched polymer has a structure represented by a formula I shown in the specification. The polyhydroxy hyperbranched polymer provided by the invention is simple to obtain and simple to use, and can improve the bending strength of the dental epoxy resin and reduce the curing shrinkage rate of the dental epoxy resin.

The invention provides a low-viscosity high-speed cigarette adhesive prepared from seed emulsion, a vinyl acetate monomer, an oxidant, an initiator, a capturing agent, an alcohol compound, a pH regulator and water, wherein the seed emulsion is one or combination of more of vinyl acetate-ethylene emulsion, vinyl acetate-acrylate emulsion, a vinyl acetate homopolymerized emulsion, the seed emulsionhaving solid content of 40.0-65.0% and viscosity of 500-5000 mPa*s. In the invention, firstly, the protective colloid in the emulsion is broken to reduce the viscosity, and then the stable emulsion system is reconstructed through polymerization, and the generation quantity of new emulsion particles is controlled, thus producing the emulsion. The viscosity of the emulsion can be lowered to 200 mPa*s, which not only satisfies the cigarette lap adhesion at the machine speed of 14,000-16,000/min but also can be used for adhesion of common materials, such as paper processing, coating decoration, nonwoven clothes, carpets, etc. The adhesive is simple in preparation method and is suitable for industrial production.

The invention discloses transparent polystyrene with the capacity scale of 50,000 tons or above as well as production equipment and process of the transparent polystyrene. The main component of the obtained transparent polystyrene product is as follows: n is the degree of polymerization, and the range of the n is 600-7000, and the n is different along with different types of products. The transparent polystyrene has good transparency, the Vicat softening point is 85-106 DEG C, the tensile strength of the transparent polystyrene is 40-55 Mpa at normal temperature, and the transparent polystyrene is a thermoplastic material. The molecular structure contains a small amount of macromolecules with a special structure, and a considerable amount of hydrocarbon micromolecules are contained in gaps of the macromolecules, so that certain slippage can be generated among the macromolecules, and the material has good transparency and mechanical properties compared with products obtained by other process production methods. The process waste water is basically not generated in the production process, all the raw materials are recycled, a small amount of generated process waste gas reaches the standard and is discharged after being condensed and adsorbed by special equipment, and good environment-friendly, energy-saving and consumption-reducing effects can be achieved.

The invention relates to a method for preparing double-layer structure foam with low residual monomer content through rapid curing, a foam material and application thereof. The prepared double-layer structure foam can be used for disposable hygiene products; upper-layer foam holes are large and play a role in rapidly absorbing and guiding fluid to other absorption areas; and lower-layer foam holes are small in size and large in specific surface area and has very high wicking capacity and fluid storage capacity. The prepared hygiene product has very good liquid treatment performance, low reverse osmosis, low odor and good softness, is better in fitness to the body compared with a traditional sanitary product, and is comfortable to use.

The invention discloses a thermal insulation type high-weather-resistance low-carbon 5D granite coating prepared from the following components in parts by weight: 20-30 parts of methyl methacrylate, 10-20 parts of butyl acrylate, 10-20 parts of 2-ethylhexyl acrylate, 1-3 parts of acrylic acid, 2-6 parts of an emulsifier, 1-2 parts of persulfate, 0.3-0.5 part of an oxidizing agent, 0.2-0.3 part ofa reducing agent, 53 parts of water, 10-20 parts of glass beads, 20-30 parts of silicon dioxide, 0.5-1 part of tea polyphenol, 15-20 parts of montmorillonite, 1-3 parts of kaolin deionized water, 1-8parts of a coalescing agent and 5-7 parts of a dispersing agent. Treatment is carried out through a redox system; further residual monomers are reduced, the 5D granite coating has the advantages of low VOC, low odor, environment friendliness and suitability for market popularization; a prepared emulsion adhesive has strong water resistance, acid resistance, alkali resistance and stain resistance,and the added silicon dioxide has good acid and alkali resistance, small silicon dioxide expansion coefficient, high hardness and good acid and alkali weather resistance, and can provide protection for vitrified micro bubbles.

The present invention provides a kind of preparation method of the carboxyl nitrile latex of vinyl chloride structure, comprises the following steps: (1) the synthesis of latex, add deionized water, electrolyte, pH buffering agent, mercaptan, emulsifier, Acrylonitrile, unsaturated carboxylic acid, unsaturated carboxylic acid ester, initiator, nitrogen filling and vacuuming, repeated three times, adding butadiene and vinyl chloride; (2) latex degassing and aftertreatment, the present invention adopts multiple chemical copolymerization reaction to form a four- or five-polymer copolymer containing vinyl chloride structural units; by adding an oil-soluble initiator in the later stage of the polymerization reaction, the polymerization reaction is more complete and the residual monomer is less; the introduction of vinyl chloride into the polymer chain Monomer, the wear resistance, tensile strength and chemical resistance of its products have been significantly improved.

The invention relates to the technical field of prefabricated part water washing surface coating agents, and discloses a prefabricated part water washing surface coating agent. The prefabricated partwater washing surface coating agent is characterized in that the mass ratio of water to glucose to a thickening agent is 1.7-2.3 to 0.7-1.3 to 0.02-0.08. When a prefabricated part is made, the coatingagent coats a formwork in advance for form erecting and pouring, after the strength of the concrete meets the hoisting requirement, form removal is performed, then a high pressure water gun is used for flushing to flush away concrete mortar on a contact surface of the coating agent, then stone aggregate is exposed outside to be conveniently combined with cast-in-place concrete, through the arrangement of components of the coating agent, the viscosity of the coating agent can be improved, meanwhile, the application performance of the coating agent also can be improved, the preparation processis simple, the cost is low, the effect is good, the proper viscosity can be conveniently adjusted, the thickening agent is arranged, so that residual monomers of the prefabricated part water washing surface coating agent are few, self-thickening property is achieved, the thickening agent color paste modulation is convenient, the stability is good, crusts are not formed on the surface, and the compatibility with a coating is good.