89results about How to "Good dilution stability" patented technology

The invention discloses a wet-rub resistant styrene-acrylic emulsion and the preparation method. The existing styrene-acrylic emulsion still can not reach the requirements under the conditions with high wet-rub resistance. The invention is takes styrene, butyl acrylate, methyl methacrylate and acrylic acid as the polymeric monomer of the system, the functional monomers containing ureido as the modified monomer of the system, compound emulsifiers as the emulsifier of the system, and thermal decomposition initiators as the initiator of the system, so as to prepare and obtain the wet-rub resistant styrene-acrylic emulsion through core-shell polymerization. The invention adopts the core-shell polymerization technology to enable the functional monomer components to be mainly distributed in the shell layers by controlling the dropping rate, so as to achieve the purpose of modifying the styrene-acrylic emulsion. The styrene-acrylic emulsion obtained through such a method has better wet-rub resistant performance and can be used as the base material of interior and exterior wall coatings, which has good prospects for development.

The invention relates to an aqueous dispersion containing a dispersant and a disperse phase containing a hydrophobic material, the dispersant comprising an anionic compound having a molecular weight less than 50,000 and being selected from the group consisting of carbon-containing compounds and silicon-containing compounds, and a cationic organic compound having a molecular weight less than 50,000. The invention further relates to the preparation and use of the dispersion in the production of paper. The invention also relates to a substantially water-free composition containing a hydrophobic material, an anionic compound having a molecular weight less than 50,000 and being selected from carbon-containing compounds and silicon-containing compounds, and a cationic organic compound having a molecular weight less than 50,000, as well as it use in the preparation of an aqueous dispersion.

The invention relates to a water-resistant high-gloss water-based styrene-acrylic emulsion and a preparation method thereof. The emulsion is prepared from the following raw materials in percentage by weight: 18-28% of styrene, 15-25% of acrylate monomer, 0.5-2% of vinyl acetate, 0.5-1% of methacrylic acid, 1-6% of crosslinking monomer, 0.5-1.5% of composite emulsifier, 0.2-1% of initiator, 2-6% of protecting adhesive, 0.1-0.5% of buffering agent, 0.2-0.4% of ammonia water, 0.05-0.2% of defoaming agent and 45-50% of deionized water. A coating film prepared from the emulsion through a coating process has remarkably high gloss and water resistance.

The invention relates to a bio-degradable alb derivative and the related pharmaceutical combinations; wherein, the derivative introduces alkyl, or fatty acyl or deoxycholic acid in the alb skeleton to enable the amphiphilic property and form a nano-micelle by self-organization in water, and can enwrap the drugs through the double effects of the hydrophobic group, the alb molecular chain and the drugs, thereby substantially improving the drug enwrapping ability of the alb and prolonging the stability time. The excipient can be used as the carrier for organic drugs, water-insoluble drugs or dugs with poor water solubility and the carrier of amphipathic drugs, and for the administration inside the vein or muscle injection and oral administration. The preparation method of the bio-degradable alb derivative and the related pharmaceutical combinations is simple and of mature techniques, which is suitable for large scale continuous production.

The invention relates to a biodegradable amphiphilic albumin derivative and a pharmaceutical composition thereof. In the biodegradable amphiphilic albumin derivative, hydrophilic long-chain polyethyleneglycol and alkyl (acyl) group or (deoxidized) cholic acid are led to an albumin skeleton so that the amphiphilic albumin derivative is amphipathic and is self-assembled in water to form nano-micelle. The biodegradable amphiphilic albumin derivative is characterized in that medicament can be encapsulated through the double actions of a hydrophobic group and an albumin molecule chain with the medicament, and the capacity of the albumin encapsulating the medicament is markedly improved; in addition, a hydrophilic long-chain can reduce the immunogenicity of the albumin and improve the nano-micelle surface hydrophilicity so that the stability of the nano-micelle in aqueous medium can be improved and the nano-micelle has long-circulation characteristics in a body. The pharmaceutical composition of the biodegradable amphiphilic albumin derivative can be used as the carrier of organic medicament, water-insoluble or insoluble medicament and amphiphilic medicament, can be used for intravascular administration, intramuscular injection administration, oral administration, cavitary administration or external administration. The invention can be prepared with simple method and mature process and is suitable of large-scale continuous production.

The invention discloses waterborne epoxy impregnating insulating varnish and a preparation method thereof. The waterborne epoxy impregnating insulating varnish is water-borne epoxy latex formed by epoxy resin, water, latent curing agents, accelerant, epoxy emulsifier, a polyvinyl alcohol water solution, other auxiliaries and the like, and the water-borne epoxy latex is free of VOC, good in stability, low in curing temperature and high in speed. The waterborne epoxy impregnating insulating varnish is simple in preparation method and low in cost and meets industrial production and application requirements.

The invention provides a new method for preparing an insoluble medicine lipidosome preparation, which is characterized in that the medicine can be carried on the dimolecular membrane via distributing and reducing grain diameter steps; and the preparation method is easy. The preparation method has the advantage of easily realizing the industrial production of the fat-soluble medicine lipidosome in virtue of the quite mature industrial production of the blank lipidsome at present.

The invention discloses zero-VOC (volatile organic compound) cement-based water-proof material copolymer emulsion and a preparation method thereof. The preparation method adopts a zero-VOC copolymer emulsion component A and an inorganic powder component B, the zero-VOC copolymer emulsion component A is prepared from deionized water, alkyl acrylate, styrene, acrylic acid functional monomers, emulsifying agents, initiators, a buffer agents, polymerization inhibitors, oxidizing agents, reducing agents, sterilizing agents and defoaming agents through polymerization of pre-emulsification semi-continuous seed emulsion, and the inorganic powder component B comprises ordinary portland cement, quartz sand and water reducers. The prepared emulsion is high in solid content, low in viscosity, uniformin particle size and good in stability and has excellent rheological property and coating water absorption, the content of a residual monomer in an emulsion product is lower than 300ppm and meets national zero-VOC emulsion standards, the emulsion is environmentally friendly and free from toxicity and pollution, the compatibility of the emulsion and cement is good, and a prepared polymer cement waterproof coating is excellent in water resistance, good in low-temperature flexibility and low in water absorption.

A complementary combination liquid/paste sauce composition and a dry, particulate seasoning composition, both of which are interdependent for effective cook up is taught. The sauce is fluid and thus has a selected amount of water and could be subject to microbiological attack which in turn requires pH control. The seasoning component is designed to buffer acidic taste of the the sauce composition to achieve selected taste.

The present invention relates to the technical field of carbon fiber sizing, and more particularly relates to an aqueous polyurethane sizing agent and a preparation method thereof. The aqueous polyurethane sizing agent comprises the following ingredients by weight: 5-25 parts of aqueous polyurethane emulsion and 75-95 parts of deionized water. The preparation method of the aqueous polyurethane sizing agent comprises the steps of: (1) preparing an aqueous polyurethane prepolymer; (2) adding deionized water to the aqueous polyurethane prepolymer to obtain an aqueous polyurethane emulsion; and (3) adding deionized water into the aqueous polyurethane emulsion by weight ratio, and stirring evenly to obtain an aqueous polyurethane sizing agent. The aqueous polyurethane sizing agent provided by the present invention has good dilution stability, increases the wetting ability of sizing agent for carbon fiber, is more conducive to adhering to the surface of the carbon fiber, so that the carbon composite fiber material shows better mechanical properties.

Disclosed is an aqueous liquid dispersion of water and oil repellent agent containing surfactants wherein there are contained (I) a homopolymer or copolymer of at least one polymerizable compound having a perfluoroalkyl or perfluoroalkenyl group and an acrylate, methacrylate or alpha-substituted acrylate group, or a copolymer of such a polymerizable compound with another copolymerizable compound which is copolymerizable with such a polymerizable compound, and (II) three nonionic surfactants, namely (a) a nonionic surfactant having an HLB of less than 12, (b) a nonionic surfactant having an HLB of not less than 12 and less than 17, and (c) a nonionic surfactant having an HLB of not less than 17. Such an aqueous liquid dispersion of a water and oil repellent agent containing surfactants is excellent in shelf life stability and dilution stability, and provides high water and oil repellency to an object.

The invention relates to amphipathic amino acid block copolymer and a preparation method and application thereof. The invention discloses the amphipathic amino acid block copolymer with a general formula (I) and salt thereof, wherein m is a positive integer in the range of 1 to 200; n is a positive integer in the range of 1 to 150; X is active terminal ammonia; and Y is alkali metal. The block copolymer can be prepared by performing reaction of anhydride of one amino acid and the active terminal ammonia, then performing reaction of the obtained product and anhydride of another amino acid and removing benzyl by adopting alkali hydroxide. Micelle prepared from the polymer has low critical micelle concentration, is not influenced by pH, has high stability and high drug-loading rate, can be used as a carrier of an organic medicament and waterinsoluble or insoluble and amphipathic medicaments, and is used for endovascular or intramuscular injection, oral administration and tract or external application drug administration. The preparation method is simple. The process is mature. The amphipathic amino acid block copolymer is suitable for large-scale continuous production.

The invention provides a hyaluronic acid functionalized astaxanthin nanoemulsion and a preparation method thereof. The preparation method of the hyaluronic acid functionalized astaxanthin nanoemulsion comprises the following steps: S1, mixing astaxanthin oil with an oil phase to form a first mixed oil phase, wherein the weight of the astaxanthin oil accounts for less than 40% of the weight of the first mixed oil phase; S2, adding a surfactant to the first mixed oil phase and mixing evenly to form a second mixed oil phase, wherein the weight ratio of the surfactant to the first mixed oil phase is 2: 3; and S3, adding an aqueous liquid of hyaluronic acid having the concentration of less than 0.2% to the second mixed oil phase, and stirring evenly, wherein the aqueous liquid of hyaluronic acid accounts for 90% of the total weight. The hyaluronic acid functionalized astaxanthin nanoemulsion and the preparation method thereof have the advantages that no high-pressure equipment is required, the astaxanthin is embedded in the nanoemulsion by use of a low-energy nanoemulsion preparation method so that the stability of the astaxanthin can be improved, the use of organic solvents such as acetone can be avoided, and meanwhile, the aqueous liquid of hyaluronic acid is utilized to increase of the rate of the astaxanthin nanoemulsion penetrating through the epidermis and improve the thermal stability of the astaxanthin in the nanoemulsion.

The invention discloses a nano-alumina modified silane waterproofing agent as well as a preparation method and application thereof. The preparation method comprises the following steps: adding a basiccatalyst into an aqueous solution of a non-ionic composite emulsifier, and adding a silane monomer while heating and stirring at 60-80 DEG C to obtain an emulsion; cooling the emulsion to 30-50 DEG C, then adding modified nano-alumina, and stirring for a reaction to obtain the nano-alumina modified silane waterproofing agent, wherein the modified nano-alumina is obtained by modifying a nano-alumina aqueous solution by silica sol or fumed silica. The prepared silane waterproofing agent has no VOC emission, is good in stability and excellent in waterproof performance, can effectively block theentry of moisture and maintain the gas permeability of a pore structure of a material itself, and can be widely used in the field of building materials.

The invention discloses a poly-heterocyclic ring based acrylate monomer modified waterborne hydroxy acrylic dispersion and a preparation method thereof. The dispersion comprises, by weight, 20-50 parts of solvents, 5-10 parts of poly-heterocyclic ring based acrylate monomers, 50-70 parts of acrylic alkyl ester, 25-30 parts of acrylic functional monomers, 1-3 parts of chain transfer agents, 2-4 parts of initiators, 1-3 parts of anion exchange reactive emulsifiers, 2-4 parts of initiators, 100-120 parts of deionized water, 0.1-0.5 part of defoaming agents, 0.2-0.6 part of leveling agents and 0.3-0.8 part of wetting agents. The glossiness of a film is higher than 97 degrees, the hardness of the film reaches up to 2H, the film is strong in impact resistance, excellent in flexibility and adhesive force, and the dispersion has prominent chemical corrosion resistance such as acid resistance, alkali resistance and water resistance, meets natural zero-VOC (volatile organic compounds) paint standards, is environmentally friendly, non-toxic and free from pollution and can be used for waterborne wood paint, waterborne industrial paint and waterborne floor paint.

The invention discloses an emulsifier for branched chain reaction type epoxy resin and a preparation method thereof. The emulsifier contains the following molecular structures: N1 is monoamine polyether amine, P is a trifunctional epoxy monomer or a trifunctional acrylate monomer, and Q is a bifunctional epoxy monomer. The preparation method comprises the following steps: reacting a P monomer withmonoamine polyether amine N1 to obtain an intermediate product; and reacting the intermediate product with a Q bifunctional epoxy monomer to obtain the emulsifier. The structure of the prepared emulsifier contains an epoxy group, the emulsifier has good compatibility with epoxy resin, and the epoxy resin emulsion prepared from the emulsifier has good storage stability, centrifugal stability and freeze-thaw stability; meanwhile, the structure of the epoxy resin emulsion contains an epoxy group, so that the epoxy resin emulsion can participate in a curing reaction to enter a cured product network, and a cured coating has excellent medium resistance; the synthesis process is simple, the structure is clear, and no catalyst is needed.

The invention provides a preparation method of polyvinyl acetate emulsion. The method is characterized in that a semi-continuous polymerization technology is carried out to prepare the polyvinyl acetate emulsion; a stabilizing agent is added to the continuous polymerizing stage; the type, the dosage and the adding mode of the stabilizer are effectively combined with the semi-continuous technologyto realize that the diluting stability of the prepared polyvinyl acetate emulsion is less than 1.0%; the stability of the diluted polyvinyl acetate emulsion is improved, and the adhering performance is greatly improved. The method is wide in raw material source, and low in price; the added cost is ignored while the quality of an existing polyvinyl acetate product is improved; an existing production technology is not changed a lot; and moreover, the method is convenient to carry out and is conveniently applicable to the polyvinyl acetate products.

The invention relates to biodegradable recombinant human serum albumin amphipathic derivatives and preparation and application of a medicinal composition thereof. For the derivatives, alkyl is introduced onto a recombinant human serum albumin skeleton, so that the recombinant human serum albumin skeleton has amphipathy, and is automatically assembled to form nano micelles in water. The biodegradable recombinant human serum albumin amphipathic derivatives have the characteristics that: a medicament can be coated by double interaction between a hydrophobic alkyl (acyl) chain and a recombinant human serum albumin molecular hydrophobic chain and the medicament; and the capability of coating the medicament by using recombinant human serum albumin is obviously improved. Auxiliary materials have high safety. Diseases can be prevented from spreading by protein sources. The biodegradable recombinant human serum albumin amphipathic derivatives can be used as vectors of an organic medicament, an insoluble or slightly soluble medicament and an amphipathic medicament and are used for intravascular or intramuscular injection, oral administration and cavitary or external administration. The medicinal composition has a simple preparation method and a mature process and is suitable for large-scale continuous production.

The invention discloses a preparation method for a waterproof protective perfluoro-acrylate copolymer aqueous dispersion miniemulsion for wood. The preparation method particularly comprises the following steps: mixing and stirring a comonomer mixture, an emulsifier and deionized water to obtain a pre-emulsion; performing ultrasonic treatment on the obtained pre-emulsion in an ultrasonic machine to obtain a stable monomer miniemulsion; placing the monomer miniemulsion subjected to fine emulsification treatment in a reaction still, separately adding a transfer agent and an initiating agent, heating to initiate polymerization, performing a reaction, insulating, cooling to the room temperature till a monomer conversion rate reaches 95.0% or above, and filtering to obtain the miniemulsion. The water and oil repellent (namely the waterproof protective perfluoro-acrylate copolymer aqueous dispersion miniemulsion) obtained according to the preparation method does not need an organic solvent, and is safe and environmentally friendly; the prepared miniemulsion is high in storage stability and dilution stability; a copolymer miniemulsion coating formed by the water and oil repellent is high in film-forming property, water resistance and oil resistance.