3825results about How to "High solid content" patented technology

The invention provides a ceramic slurry preparation and 3D (three dimensional) printing light curing molding method. 25-85vol% of ceramic powder and 15-75vol% of an optical resin premix solution are mainly involved, and the method includes: A), preparation of the optical resin premix : namely stirring a low polymer, a reactive diluent, a photoinitiator, a dispersing agent, a photosensitizer and a sensitizer according to a certain proportion under intermediate speed for 0.5-3 hours to enable the components to be mixed evenly; B), placing the premix solution and the ceramic powder in a ball mill according to certain volume for ball-milling for 5-15 hours to prepare the ceramic slurry high in solid content and low in viscosity; subjecting the ceramic slurry to curing molding layer by layer gradually on a 3D light curing molding machine to obtain a ceramic green body prior to aftertreatment of drying, degreasing, sintering and the like to obtain ceramic part. The method is high in preparation molding precision and free of molds to prepare complex structure parts, the ceramic product can reach more than 92% in density, 320-1750MPa in flexural strength and 1800-4500MPa in compression strength.

The present invention discloses intercalates formed by contacting a layered material, e.g., a phyllosilicate, with an intercalant monomer surface modifier including an alkyl radical having at least 6 carbon atoms and a polymerizable monomer, oligomer or polymer. The intercalant monomer surface modifier converts the interlayer region of the layered materials from hydrophilic to hydrophobic, therefore, polymerizable monomers, oligomers or polymers can be easily intercalated into the interlayer spacing. The co-presence of the intercalant monomer surface modifier and polymerizable monomer, oligomer or polymer provide an environment for more polymerizable monomers, oligomers or polymers to be intercalated into the interlayer spacing and the intercalates are readily exfoliated into polymer matrices to form nanocomposites. The nanocomposites (e.g., epoxy-clay) prepared from the intercalates demonstrated enhanced mechanical, thermal and chemical resistance compared with pristine polymer matrices.

A superabsorbent polymer comprising a delayed absorption superabsorbent polymer having a free water absorbency property of absorbing less than about 3 grams of aqueous saline per gram of superabsorbent polymer in about 6 seconds, for a full particle size distribution of superabsorbent polymer ranging from about 40 micrometers to about 890 micrometers.

The invention relates to a high-sealing polyacrylic ester dispersoid and a preparation method thereof; a multi-element emulsifier system which consists of an anionic emulsifier and a compound non-ionic emulsifier is adopted for controlling the charging process and components of the emulsifier in different polymerization periods, and the room-temperature self-crosslinking high-sealing polyacrylic ester dispersoid is prepared by a semi-continuous seeding emulsion polymerization process. The dispersoid has small particle size, good electrolyte-resistance (calcium ion) stability and high tolerance to various film forming accessory ingredients (various organic solvents with high boiling point). The dispersoid is used as seal coat of water-based wood coating and has good sealing performance to various woods; harmful volatile organic compounds (VOC) such as formaldehyde, and the like sealed against escaping from plates to pollute indoor environment, and the colored compounds such as turpentine, pine oil and tannin and the like are sealed against dissolving out of the plates to pollute pure top coating and white top coating of a water-based wooden ware; and in addition, the dispersoid can be used in water-based leather finishing agents.

In the proposed condensation product based on amino-s-triazines with at least two amino groups, formaldehyde and sulphite, the molar ratio of amino-s-triazine, formaldehyde and sulphite is 1:2.5-6.0:1.51-2.0 and the formiate content is less than 0.3 wt %. The condensation product is obtained by a) heating amino-s-triazine, formaldehyde and a sulphite in the molar ratio 1:2.5-6.0:1.51-2.0 in an aqueous solution at a temperature of 60-90° C. and a pH level of between 9.0 and 13.0 until the sulphite can no longer be detected; b) continuing the condensation at a pH level of between 3.0 and 6.5 and a temperature of 60-80° C. until the condensation product has a viscosity of 5-50 mm/s at 80° C.; and c) adjusting the pH level of the condensation product to 7.5-12.0 or carrying out thermal secondary treatment at a pH level of >10.0 and a temperature of 60-100° C. The product can be used as an additive for inorganic binders such as cement.

The invention relates to a method for preparing a high solid content latent cured polyurethane acrylic acid heterozygous latex and an application thereof. The preparation method comprises the following steps: pre-polymerizing polyester polyalcohol, hydrophilic chain extender and diisocyanate monomer to obtain the polyurethane prepolymer containing a hydrophilic group (carboxyl or sulfo group) and a terminal NCO group; then, neutralizing the polymer into salt and dispersing the salt in water to prepare the polyurethane water dispersoid; finally, using the dispersoid as macro molecular emulsifying agent and reactant to emulsify and disperse the acrylic ester monomer, initiating the polymerization by heating, dropping initiator to perform the latex polymerization, and regulating the pH of the latex by adding a latent curing agent to obtain the high solid content latent cured polyurethane acrylic acid heterozygous latex. The high solid content latent cured polyurethane acrylic acid heterozygous latex has a solid content of above 45%; the storage of the high solid content latent cured polyurethane acrylic acid heterozygous latex is stable; and high hardness film coating can be formed at the room temperature. Compared with acrylic acid latex and polyurethane latex, the high solid content latent cured polyurethane acrylic acid heterozygous latex has better film forming performance, water resistance, alcohol resistance, pollution resistance, dry/wet cleaning resistance and chemical solvent resistance, as well as high hardness.

The present invention provides composite materials derived from formaldehyde-free aqueous binder compositions comprising defatted soy flour of no greater than 43 micron mesh particle size, polymer particles of at least one emulsion (co)polymer, and one or more reducing sugar. Also provided are methods of making and using composite materials containing the formaldehyde-free binder compositions.

The invention discloses a thick paste quick-drying type weather-resistant and wear-resistant coating for wind turbine blades and a preparation method thereof, the coating takes poly-asparaginic acid ester and elastic resin-modified aliphatic isocyanate as base materials, a nano-material is adopted for being effectively bonded with a resin matrix, and appropriate auxiliaries and additives for enhancing the performances of the coating. The thickness of a film which is formed by the coating for the wind turbine blades once can achieve 300 mu m; furthermore, the drying speed is fast and the coating is less prone to bubbling; the weather resistance is excellent, and the coating has higher tensile strength and elongation at break, and prominent wear resistance and impact resistance; the performances of water resistance, chemical product resistance, wet heat resistance, salt mist resistance and high and low temperature resistance are excellent; and the coating has certain anti-pollution and anti-icing properties. The construction efficiency of the coating is high, the performances of the coating are particularly suitable for wind field environments in China, the service life of a unit can be prolonged and the maintenance cost can be reduced.

The invention refers to a high-solid content acrylate micro-latex, its making method and its application to carpentry dope. It adopts the technique of half-continuous starvation feeding, and is obtained by the polymerizing method of seed latex. It leads into cross-linking groups in the course of polymerization such as amidogen, acetoacetyl and amido, depends on the reaction of the groups of form film, gets painting film with cross-linking construction, and improves the water and solvent resistance of the painting film.

The invention provides bicomponent high-strength sprayed polyurethane waterproof paint. The paint consists of a component A and a component B according to the volume ratio of 1 to 1, wherein the component A is a semi-prepolymer synthesized by polyisocyanate with low functionality and polyether glycol; according to weight portion, the component A comprises 50 to 80 portions of the polyisocyanate with functionality of between 2.0 and 2.4 and 20 to 50 portions of the polyether glycol with functionality of between 2 and 4; and the component B comprises 40 to 84 portions of the polyether polyol or amino-terminated polyether or mixture of the polyether polyol and the amino-terminated polyether, 10 to 40 portions of amine chain extender or alcohol chain extender or mixture of the amine chain extender or the alcohol chain extender and 0 to 20 portions of pigment filler and additive. The bicomponent high-strength sprayed polyurethane waterproof paint has mechanical performance close to or even higher than that of a waterproof coiled material, adopts a spraying construction method, is convenient and high-efficient and greatly prolongs the service life of the waterproof material; and a solvent-free system also greatly ensures the environment-friendly requirement of the material, so that the performance is more reliable, high efficient and environment-friendly. Compared with a conventional waterproof material, the bicomponent high-strength sprayed polyurethane waterproof paint has high strength and elongation rate.

The present invention relates to high solid content vinyl acetate-ethylene copolymer latex for binder and the synthetic method, including 55 to 75 portion of vinyl acetate, 24 to 45 portion of ethylene, 3 to 5 portion of N-methylol acrylamide, 2 to 4 portion of PVA1788 and PVA0588, 0.4 to 1.0 portion of the compound of nonionic emulsifying agent nonyl phenol polyoxyethylene alkyl ether and anion emulsifying agent alkyl sulphate with 2:1 mixture ratio, 0.2 to 1.0 portion of 35 percents oxydol with 1:1 mixture ratio, 0.05 to 0.4 portion of formol zinc sulphate, 0.1 to 0.5 portion of ferrous sulphate, 0.5 to 1.0 portion of regular dodeca-carbon thiol-alcohol, 0.05 to 0.35 portion of potassium phosphate, 0.1 to 0.5 portion of sodium bicarbonate and 45 to 55 portion of de-ionized water. With the adoption of latex polymerization, low-residual monomer VAE latex with solid content more than 65 percents is synthesized, which is used as binder to be applied in timber processing industry and packaging industry.

The invention discloses a modified-starch-based wood adhesive and a preparation method thereof. The preparation method comprises the steps that oxidized corn starch is used as a main raw material, a cross-linking agent is added into the oxidized corn starch to conduct crosslinking modification, and then an initiating agent and a high molecular monomer are added to the oxidized corn starch to conduct graft modification, so as to obtain a modified starch emulsion in a complex net structure; and after the modified starch emulsion is warmed up and pasted, modifying agents comprising a stabilizing agent, a defoaming agent, a plasticizing agent and the like are added into the modified starch emulsion, and the high-performance green environment-friendly adhesive is manufactured. Each performance of the adhesive disclosed by the invention can reach or exceed requirements of a GB/T9846-2004 standard, the adhesive has the characteristics of high bonding strength, good water resistance, long storage time, high solid content, low cost, greenness, environment friendliness and wide use range, and can be widely applied to the bonding and the use of wood materials such as artificial boards, plywood and cellulose boards.

A liquid removal apparatus adapted to separate liquid from a composite slurry of liquid and solids. The apparatus includes a movable, permeable membrane having opposing first and second sides. A ‘loaded belt portion’ of the second side is configured to receive the slurry. A permeable membrane support system is configured to provide movable support for the loaded belt portion and includes a transport deck located in contact with the first side of the permeable membrane below the loaded belt portion. The liquid removal apparatus has a housing with a low-pressure chamber in sealing contact with the first side of the permeable membrane. A pressure conditioning system applies a differential pressure via the housing to generate a lower pressure on the first filter belt side than on the second side. The transport deck is located within the low pressure chamber.

The present invention is method of raising solid content in catalytic cracking catalyst slurry. The method includes mixing clay, molecular sieve slurry, aluminum-containing binder, pseudo boehmite and inorganic acid to form catalyst slurry and the subsequent spray drying. It features that the addition of inorganic acid before adding pseudo boehmite and the molecular sieve, and the addition of inorganic acid after adding kaolin and aluminum-containing binder or into the aluminum-containing binder. The present invention can raise the solid content in catalyst slurry to over 40 % to short the colloid forming time greatly, raise the catalyst producing efficiency and lower catalyst producing cost while ensuring the wear strength of catalyst. At the same time, the catalyst has great pore volume, high micro reaction activity and improved comprehensive reaction performance.

The invention discloses water-based UV black ink with super-high solid content and a preparation method thereof. The black ink comprises the following components in percentage by weight: 20%-60% of high-functionality water-based polyurethane acrylate, 5%-8% of compound photoinitiator, 15%-35% of hydrophilic acrylate diluted body or prepolymer, 10%-25% of solvent and 5%-15% of nano-carbon black pigment. The light curing time of the water-based UV black colored paint of the invention is shorter than 5 seconds, the bottom layer can be completely cured, the comprehensive properties of adhesive force, hardness, toughness and the like are excellent, and the water-based UV black colored paint can be widely applied to the fields of ink, wood paint and the like; the solid content is as high as 80%;and the water-based UV black ink has short drying and curing time, simple construction technology and high production efficiency, can be diluted by water or ethanol or other nontoxic solvents for regulating the viscosity, is suitable for various production modes and production requirements, and is environment-friendly and nontoxic.

The invention relates to a preparation method of an aqueous polyurethane emulsion with a high solid content. The method comprises the following steps: first, adding polymer polyol, polyisocyanates, catalyst and chain extender into a reactor according to certain steps, and controlling hydrophilic groups to distribute on molecular chain ends; then adding polyisocyanates to form a performed polymer terminated with an NCO group; then reducing system temperature, adding a neutralizer for neutralization, adding deionized water, and stirring with high speed to carry out water dispersion; at last, adding a post chain extender to carry out chain extension in water; removing the solvents under a reduced pressure after reaction to obtain the aqueous polyurethane emulsion. According to the invention, hydrophilic efficiency of the hydrophilic groups is raised to lower intake amount of hydrophilic groups, and a small amount of solvents are added in the reaction to lower a system viscosity. The aqueous polyurethane emulsion prepared by the invention has characteristics of high solid content, low viscosity, good water resistance and stabile storage, and can be used in industries of paint, adhesive, leather finishing and fabric arrangement, etc.