323results about How to "Improve freeze-thaw stability" patented technology

The present invention is an aqueous coating composition having excellent freeze-thaw stability and a low-VOC content. The aqueous coating composition of the invention includes at least one latex polymer derived from at least one monomer and at least one polymerizable alkoxylated surfactant, at least one pigment, and water. In accordance with the invention, less than 3.0% by weight of anti-freeze agents based on the total weight of the aqueous coating composition are used in the composition. The present invention also includes a method of preparing an aqueous coating composition such as a latex paint including the above components.

The present invention relates to a method of producing a frozen confection product with improved freeze-thaw stability. In particular, the invention relates to a method comprising a post pasteurization acidification step. The present invention also relates to products obtainable by such a method.

The invention provides aqueous coating composition having freeze thaw stability, comprising: (a) at least one latex polymer derived from at least one monomer and at least one reactive surfactant of the formulaR1O—(CH2CHR2O)x—(CH2CH2O)y—(CH2CHR3O)z—R4 where R1 is either alkyl, aryl, alkylaryl, or aralkylaryl of 8-30 carbon atoms, R2 is —CH2OCH2CH═CH2 (AGE); R3 is either H, CH3, or CH2CH3; R4 is H or —SO3M or —PO3M where M is H or K, Na, NH4, NR4, alkanolamine, or other cationic species and x=2-100; y=4-200 and z=0-50.

Disclosed are latex polymers and an aqueous coating compositions having excellent freeze-thaw stability, open time, stain resistance, low temperature film formation, foam resistance, block resistance, adhesion, water sensitivity and a low-VOC content. The latex polymers and aqueous coating compositions include at least one latex polymer derived from at least one monomer copolymerized or blended with an alkoxylated compound, for example an alkoxylated tristyrylphenol or an alkoxylated tributylphenol. Also provided is an aqueous coating composition including at least one latex polymer, at least one pigment, water and at least one freeze-thaw additive. Typically, the freeze-thaw additive in an amount greater than about 1.3% by weight of the polymer, typically in an amount greater than about 2% by weight of the polymer, in an amount greater than about 4% by weight of the polymer, in an amount greater than about 7.5% by weight of the polymer, in an amount greater than about 10% by weight of the polymer or in an amount greater than about 20% by weight of the polymer.

The invention relates to a method for preparing active organosilicon end capping polypropylene oxide cationoid emulsion, which comprises the following steps: using hydrogen-containing polysiloxane, unsaturated polyether and epoxy-containing unsaturated compounds as main raw materials to prepare epoxy-containing polyether-polysiloxane by adopting two steps of silicon-hydrogen addition reaction and then prepare a series of quaternary ammonium salt type polyether-polysiloxane nonionic cationic surfactants with different molecular weights and different hydrophilic and oleophilic values through quaterisation, and then using the obtained surfactant to emulsify active organosilicon end capping polypropylene oxide (SPPO), so as to obtain the active organosilicon end capping polypropylene oxide cationoid emulsion containing no organic solvent and having good storage stability and freeze-thaw stability through phase inversion emulsifying process. The method has the advantages of little equipment investment, simple process, easy operation and low production cost; and the obtained active organosilicon end capping polypropylene oxide cationoid emulsion can be used as a basic material for producing environment-friendly water-based polymer products such as paint, adhesive and sealant.

The present invention relates to one kind of stuffing for roasted food and its preparation process. The stuffing consists of sugar 10-30 wt%, modified starch 0-11 wt%, hydrophilic colloid 0.1-0.6 wt%, steamed monoglyceride 1-5 wt%, potassium sorbate 0.01-0.1 wt%, food water preserver 5-30 wt%, edible essence and / or edible color 0.2-0.5 wt%, and water for the rest, with water content being less than wt%. The stuffing has the synergistic effect of colloid and modified starch, high flowability, high water preserving capacity, high freezing resistance and stable quality, and the roasted food with the stuffing has good taste.

This invention relates to a preparation method of oxidation, cross linkage, esterification ternary modified starch. It has following steps:(1) by weight ratio 1 : 1- 1 : 2 to blend and whip uniformity of mixture starch and water, add catalyzer, use alkaline solution to adjust pH for 6 to 9; (2) drop oxidizer, take oxidation reaction 1 to 2 hours at 35 to 45 deg, add termination agent to destroy surplus oxygen; (3) Drop esterification cross-linking agent to product after oxidation reaction, takes esterification and cross linking reaction 1 to 2 hours at 35 to 45 deg. The described esterification cross-linking agent is mixed solvent of acetic anhydride and dicarboxylic acid, proportion by weight is 1 : 1 to 1: 60; (4) centrifugal dewatering the product after esterification cross linking reaction, and then drying to obtain product.

The invention relates to a novel compound burn-free water permeable brick and a preparation method thereof. According to the novel compound burn-free water permeable brick, the problems of high preparation cost, low strength, poor water tolerance and the like of an existing water permeable brick are mainly solved. The water permeable brick comprises a surface layer and a bottom layer, wherein the surface layer is prepared from super-hydrophilic fibers through mixing, hot press and maintenance by taking waste ceramic shattered bone as an aggregate as well as sulphate aluminum cement and thermosetting resin as bonding materials, and the bottom layer is prepared by adding materials such as water-repellent powder, water reducing agents, defoaming agents and interface enhancer by taking the waste ceramic shattered bone as the aggregate as well as ordinary Portland cement as a bonding agent. The preparation method of a coating layer comprises the steps of uniformly stirring in a certain proportion so as to obtain a mixture, putting the mixture into a forming mold, and carrying out steam maintenance, so as to prepare the burn-free water permeable brick which has good water permeability and water-retaining property and high strength and is suitable for northeast high and cold areas. Compared with traditional burn-free bricks, the novel compound burn-free water permeable brick has good water permeability and freeze-thaw stability, and a direction is provided for the comprehensive renovation work of environments.

The invention relates to a freezing-resistant acrylate suspended thickening emulsion which is prepared from 28.0-32.0 wt% of raw material and 68.0-72.0 wt% of deionized water. The raw material is composed of the following components in percentage by weight: 10.0-75.5% of hydrophilic monomer, 15.0-85.0% of hydrophobic monomer, 0-3.0% of crosslinking monomer, 0.5-25.0% of hydrophobicity-modified surface-active monomer, 1.0-14.0% of emulsifier, 0.1-1.0% of initiator and 0.1-2.5% of alkaline matter. The invention also relates to a preparation method of the freezing-resistant acrylate suspended thickening emulsion. The freezing-resistant acrylate suspended thickening emulsion can satisfy the standard in daily chemical industry, and has the advantages of stable application performance, long shelf life and favorable freezing resistance.

The invention relates to a preparation method for a fatty acid starch ester and application thereof, which belongs to the technical field of modified starch. According to the invention, starch is adopted as a raw material and fatty acid is taken as an esterification agent; and on the condition of taking an extruder as a chemical reactor, the acidolysis and esterification modification of the starch is carried out to prepare the fatty acid starch ester product with the low substitution degree. The fatty acid which is subjected to the high temperature high pressure high shearing action treatment of the extruder has an esterification reaction with crude starch according to a certain proportion; and due to the introduction of the hydrophobic organic carbon chain, the starch has the lipophilicity and hydrophilicity, and consequently has certain emulsibility. The product can be used as a stabilizer, an emulsifier, a gelling agent, a fat substitute, a microcapsule wall material, and the like in the food industry, and can be applied to the foods such as artificial butter, salad seasoning matter, bakery products, diary products, and the like. The invention has the advantages that the extruder is adopted to prepare the esterified starch; the reaction process is continuous and has simple operation, easy implementation and little environmental pollution; and the obtained product has excellent performance.

The invention relates to the technical field of food and in particular discloses crystal mochi preblended flour, crystal mochi and a preparation method thereof. The crystal mochi preblended flour is prepared from the following raw materials in parts by weight: 10-15 parts of hydroxypropyl distarch phosphate, 8-13 parts of acetylated distarch phosphate, 0.5-0.7 part of maltitol, 0.2-0.4 part of monoglyceride, 0.04-0.06 part of sodium dehydroacetate and 0.04-0.06 part of citric acid. The crystal mochi is characterized in that a wrapper of the crystal mochi is prepared from raw materials, namely the crystal mochi preblended flour disclosed by the invention, water, emulsified oil and malt syrup. The mochi disclosed by the invention does not harden during storage, has good freeze-thaw stability, does not crack or collapse after being thawed, can maintain the original smooth and glutinous tastes and is long in quality guarantee period; and the prepared mochi is glittering and translucent in appearance and is soft, strong and not sticky and does not stick the mouth when entering the mouth, and the prepared mochi has good elasticity.

A method for producing corn porous starch by using a low temperature freeze-thawing technology comprises the following steps: 1, immersing corn starch; 2, freeze-thawing: freezing the immersed corn starch at -10 ~ -196 DEG C for 0.5-12 h, unfreezing the frozen corn starch at 20-50 DEG C for 3-8 h, and repeatedly carrying out freezing and unfreezing treatment 1-50 times. The method has the advantages of simplicity in operation, high production efficiency, clean production technology, no pollution to environment, realization of large-scale continuous production, and low production cost due to adoption of reagents and materials having common specifications; and the corn porous starch produced in the invention has the advantages of high freeze-thawing stability, strong reaction activity, good adsorptivity and good embedding property.

The present invention is an aqueous coating composition having excellent freeze-thaw stability and a low-VOC content. The aqueous coating composition of the invention includes at least one latex polymer derived from at least one monomer and at least one polymerizable alkoxylated surfactant, at least one pigment, and water. In accordance with the invention, less than 3.0% by weight of anti-freeze agents based on the total weight of the aqueous coating composition are used in the composition. The present invention also includes a method of preparing an aqueous coating composition such as a latex paint including the above components.

The belongs to the field of compound material, and is especially one kind organic-inorganic sand fixing material for tackling desert. the sand-fixing polymer-cement material consists of cement in 1 weight portions, sand 5-10, water 0.5-1, cation emulsified asphalt 0.03-0.1, high water absorption sodium polyacrylate resin 0.02-0.1; and the mixture is sprayed in desert. The cement mortar is modified with black, heat insulating and water absorbing and maintaining cation emulsified asphalt and high water absorption sodium polyacrylate resin, so that the present invention has the features of high strength, high water absorbing and maintaining performance, high durance, high freeze thawing stability, high wind erosion and weather resistance, no environmental pollution, low cost, etc.

The invention discloses a new typed white copolymerization emulsion in the binding technical domain, which comprises the following steps: dispensing raw materials with polyvinyl alcohol, deionized water, sodium bicarbonate, vinyl acetate, butyl acrylate, tertiary carbonate vinyl ester, dispersant, defoamer, ammonium persulphate, plasticizer and pH value adjuster; doing the polymerizing reaction in the glass lining autoclave; putting the polyvinyl alcohol and deionized water in the autoclave; heating to dissolve the materials; cooling to adding the dispersant and defoamer; adding the reacting monomer to polymerize under normal pressure at 72-80 deg. c in the stirring condition; adding fitful quantity of pH adjuster to control the pH value between 6. 0 and 7. 0; adding plasticizer DBP; forming the product with good binding property and transparent organic film, safety and environment protection to save resource.

The invention relates to the field of agricultural application, in particular to a multifunctional degradable liquid mulch film with macromolecule polymer as the main component and a preparation method and a usage method thereof. The mulch film comprises according to the weight percentage 2%-8% of polyvinyl alcohol, 2%-6% of carboxymethylcellulose sodium, 0.1%-0.5% of a crosslinking agent, 0.2%-0.5% of a defoaming agent, 0.3%-0.7% of glycerol and the balance of water. The mulch film provided by the invention is fully stirred with water and sprayed on the soil surface; the macromolecular hydrophilic groups can effectively combine with active sites on soil particles to form a crosslinking layer on the soil surface, so as to inhibit the moisture evaporation of soil and reduce soil erosion. The product has the effects of shortening seedling emergence time of crops, improving soil structure, promoting crop yield and avoiding pollution to the soil environment, can improve the shortage of agricultural water resources in semiarid area to a certain extent, and has broad application prospects.

The invention provides a preparation method of composite modified starch, comprising: carrying out crosslinking by crosslinker sodium trimetaphosphate; and then esterfying by succinic anhydride. The invention also provides a composite modified starch prepared with the method and application thereof.

The invention provides a water-based acrylic finish paint which comprises the following components in percentage by weight: 30-65% of water-based acrylic resin, 0.5-5% of dispersant, 0.1-5% of defoaming agent, 0.1-5% of base wetting agent, 10-30% of pigment and filler, 1-10% of pH regulator, 1-10% of thixotropic agent, 1-10% of flash etching inhibitor, 0.5-5% of film-forming assistant, 1-5% of light stabilizer and 5-20% of deionized water. The water-based acrylic finish paint provided by the invention is a single component paint, and is prepared from water-based acrylic resin used as a base, and multiple assistants. The water-based acrylic finish paint has the advantages of excellent aging resistance and high weather resistance. The experiment proves that the ultraviolet aging resistance of the water-based acrylic finish paint is up to 600 hours. In addition, the water-based acrylic finish paint also has the advantages of high thermal stability, favorable mechanical properties and outstanding freeze-thawing stability, satisfies the environmental-protection requirement, has a very high practical value, and is suitable for the occasions which require long-term aging resistance and have a high environmental-protection requirement.

The invention belongs to the technical field of frozen dumpling processing by additives, in particular to a frozen dumpling modifying agent, a preparation method thereof and application. The frozen dumpling modifying agent is prepared from the following components in percentage by weight via mixing: 35 to 42 parts of active soybean meal, 25 to 38 parts of konjaku flour, 5 parts of complex enzyme, 8 to 12 parts of carrageenin and 10 to 20 parts of modified starch. The modifying agent can adapt to the process requirements of the mechanized production of the frozen dumplings, improve the quality of finished products of the frozen dumplings, effectively improve the mechanical stirring resistance degree of the flour dough of the frozen dumplings, reduce the roll adhesion phenomenon of cheeks during the mechanized production, can simultaneously improve the boil resistance performance, the smooth performance and the freeze-thaw stability of the frozen dumplings, and improve the external appearance and the mouth feeling of the frozen dumplings.

The invention discloses a calcium stearate dispersing liquid for papermaking and a preparation method thereof. The liquid comprises, by weight percent, 30 to 60 % of water, 30 to 60 % of stearic acid, 5 to 15 % of calcium hydrate, 0.8 to 3.2 % of a dispersant, 1 to 2.5 % of an emulsifier A, 1 to 4 % of an emulsifier B, 0.3 to 0.6 % of an emulsification auxiliary agent, 0.1 to 0.8 % of an stabilizing agent, 0.4 to 3 % of a catalyst, 0.3 to 0.5 % of an antifoaming agent, and 1 to 2.8 % of a modified polyvinyl alcohol aqueous solution. The invention further discloses a preparation method of the calcium stearate dispersing liquid for papermaking. The calcium stearate dispersing liquid for papermaking and the preparation method thereof are simple to operate and suitable for industrial production, and the prepared calcium stearate dispersing liquid for papermaking is good in stability, and has greatly improved freeze-thaw stability especially.

The invention discloses a repairing material for a base layer of oil colored paintings of ancient architecture, which comprises an acrylic acid-2-ethylhexyl ester, a vinyl acetate, a methyl methacrylate, an acrylic acid, an N-hydroxymethyl acrylamide, an emulsifying agent, a neutralizing agent, a defoaming agent, a rheological agent and an initiating agent. The preparation technology comprises the following steps of: preparing a polyacrylate emulsion by using free radical emulsion polymerization, and adding the neutralizing agent, the deforming agent and the rheological agent in the polyacrylate emulsion to obtain an emulsion binder. The emulsion binder prepared by the invention has no granular condensation products, good mechanical stability, freeze thaw stability and interface adhesion force, can be coated and injected, is free from ash removal and reversible at a high temperature and is applicable to the binding materials for repairing the base layer of the oil colored paintings of the ancient architecture.

The invention discloses an automobile water-based two-component epoxy primer with excellent performance and a preparation method thereof. The water-based epoxy primer involved in the invention is composed of a component A and a component B. The component A is composed of epoxy resin, a cosolvent, powder slurry and assistants, wherein the powder slurry includes deionized water, additives, extender pigment, anti-rust pigment and pigment. The component B contains a polyamine curing agent, deionized water, a cosolvent and assistants. The preparation method includes: conducting charging according to the powder slurry formula of the component A, then performing high speed dispersion for 15min, then bringing the materials into a sand mill to conduct grinding to fineness of less than 30 micrometers to obtain the powder slurry, mixing epoxy resin, the cosolvent, the powder slurry and the assistants evenly to obtain the component A, mixing the component A with the components B in certain proportion, adding deionized water to adjust viscosity, and carrying out spray coating to obtain an epoxy primer film. The water-based epoxy primer provided by the invention not only realizes aquation of automobile epoxy primer and great reduction of the VOC content, but also has excellent comprehensive performance.

Disclosed are latex polymers and an aqueous coating compositions having excellent freeze-thaw stability, open time, stain resistance, low temperature film formation, foam resistance, block resistance, adhesion, water sensitivity and a low-VOC content. The latex polymers and aqueous coating compositions include at least one latex polymer derived from at least one monomer copolymerized or blended with an alkoxylated compound, for example an alkoxylated tristyrylphenol or an alkoxylated tributylphenol. Also provided is an aqueous coating composition including at least one latex polymer, at least one pigment, water and at least one freeze-thaw additive. Typically, the freeze-thaw additive in an amount greater than about 1.3% by weight of the polymer, typically in an amount greater than about 2% by weight of the polymer, in an amount greater than about 4% by weight of the polymer, in an amount greater than about 7.5% by weight of the polymer, in an amount greater than about 10% by weight of the polymer or in an amount greater than about 20% by weight of the polymer.

The invention relates to the technical field of rice dumplings, and particularly relates to crystal rice dumplings and a preparation method of the crystal rice dumplings. Wrappers of the rice dumplings comprise the following raw materials in parts by weight: 30-50 parts of sticky rice starch, 20-40 parts of hydroxy propyl distarch phosphate, 20-24 parts of oxidized starch, and 6-10 parts of pregelatinized starch; fillings comprise the following raw materials: 15-25 parts of fruit pulp, 30-70 parts of jam, 10-20 parts of sugar, 3-8 parts of edible oil and 8-12 parts of acid treatment starch. According to the crystal rice dumplings provided by the invention, complex type modified starch is adopted for preparing wrappers, and fruits act as fillings, so that not only are the sugar content and oil content reduced greatly, the crystal rice dumplings are easy to assimilate by human bodies, but also the appearances of the traditional rice dumpling are changed subversively; the rice dumplings are crystal clear in wrapper, are elastic and sticky in mouthfeel, are sweet and tasty, and can meet the diet need of modern people.

The invention relates to a method for preparing compound modified starch for replacing gelatin, which comprises the steps of: first, mixing rice starch and water to form starch milk; adding an oxidant for reaction to obtain oxidized starch, then adding a cross-linking agent for reaction to obtain cross-linking starch, and then adding epoxypropane and alkali liquor for hydroxypropylate reaction to obtain the compound modified starch finally. The compound modified starch has performance advantages of various modified starches, good water-solubility, low pasting temperature, low viscosity of pasting, high stability, strong gelatinization, good freeze thawing stability and high transparency. The method has simple synthesizing process, low cost, high yield, and simple operation and is expected to replace gelatin and be applied actually in preparation of capsule wall material, jelly and candy.

The invention discloses a flour improver for instant frozen dumplings, a method for manufacturing the flour improver and application thereof. The flour improver for the instant frozen dumplings comprises, by weight, 2-5 parts of xanthan gum, 2-4 parts of guar gum, 2-4 parts of monostearin, 5-9 parts of stearic calcium and sodium lactate, 1-4 parts of composite phosphate, 1-3 parts of glutamine transaminase and 2-6 parts of sodium chloride. The composite phosphate comprises tetrasodium pyrophosphate, sodium tripolyphosphate and sodium hexametaphosphate. The method includes respectively sieving the xanthan gum, the guar gum, the monostearin, the stearic calcium and sodium lactate, the tetrasodium pyrophosphate, the sodium tripolyphosphate, the sodium hexametaphosphate, the glutamine transaminase and the sodium chloride by the aid of Number-CB36 sieves; mixing the xanthan gum, the guar gum, the monostearin, the stearic calcium and sodium lactate, the tetrasodium pyrophosphate, the sodium tripolyphosphate, the sodium hexametaphosphate, the glutamine transaminase and the sodium chloride with one another to obtain the improver for the instant frozen dumplings. The flour improver, the method and the application have the advantages that problems of frost cracking and the like of dumpling wrappers of existing instant frozen dumplings during instant freezing, mechanical packaging and low-temperature storing can be solved by the aid of the improver for the instant frozen dumplings, the smoothness, the boiling fastness and the freeze-thaw stability of the instant frozen dumplings can be enhanced, and the taste and the appearance of the instant frozen dumplings can be obviously improved.

The invention belongs to the technical field of coatings and provides vac-veova emulsion and a preparation method thereof. The vac-veova emulsion has a good high pH value and high temperature stability, and can simultaneously have good freeze-thaw stability, thermal storage stability and scrubbing resistance under the condition that an antifreezing agent and a film forming auxiliary agent are notadditionally added. The vac-veova emulsion comprises, by mass, 10-30 parts of alkyl acrylate, 5-95 parts of vinyl acetate, 1-40 parts of vinyl tert-carbonate, 0.1-10 parts of alkyl carboxylic acid, 1-10 parts of a crosslinking functional monomer and 0.5-6 parts of an emulsifier; 0.1-2 parts of an initiator; 0.01-0.5 part of a buffer, 0-0.5 part of a pH regulator and 100 parts of deionized water. The vac-veova emulsion is used as a high-performance low-cost environment-friendly emulsion for building coatings.

The invention discloses a preparation method of waterborne polyurethane with excellent freeze-thawing stability. The preparation method specifically comprises the steps of: at 20-80 DEG C, adding amino type polyhedral oligomeric silsesquioxane into acetone of excessive isocyanate monomer, reacting to be clear, setting the temperature to be 60 DEG C, adding ethyoxyl-terminated polymer glycol, diol and polyol, and catalyst di-n-butyl tin dilaurate, reacting for one to two hours, and controlling the R value to be 1.50-3.00 in the prepolymerization reaction; then increasing the temperature to be 70-90 DEG C, continuously reacting for one to two hours, then cooling to room temperature, adding water for dispersion, adding a chain extender at 30-50 DEG C to conduct chain extension reaction for two to four hours, and cooling to room temperature to obtain waterborne polyurethane. Through tests, the waterborne polyurethane has favorable wear resistance property and bonding strength, as well as excellent freeze-thawing stability.

The invention provides an acrylate emulsion for building interior wall paint and a preparation method thereof, and paint, and belongs to the technical field of building paint. The emulsion is preparedfrom the following raw materials, by weight: 6-20 parts of butyl acrylate, 15.5-26 parts of styrene, 6-20 parts of 2-ethylhexyl acrylate, 0.11-0.55 part of a self-crosslinking monomer, 0.15-1.3 partsof acrylamide, 0.2-3 parts of a carboxyl monomer, 0.015-0.12 part of a silane coupling agent, 0.21-0.81 part of a reactive anionic emulsifier, 0.21-0.81 part of a reactive non-ionic emulsifier, 0.1-2parts of polyethyleneimine, 0.1-0.2 part of adipic dihydrazide, 0.12-0.45 part of persulfate, 0.2-2 parts of ammonia water, and 30-60 parts of water. The emulsion is mainly used for building interiorwall paint; the emulsion can have low MFFT without adding a film forming auxiliary; and the paint prepared by the emulsion can have excellent scrubbing resistance and freeze-thaw stability, and is low in VOC content and excellent in environmental protection.

The invention relates to an adhesive for wallpaper industry and particularly relates to sticky rice wet glue added with an emulsion stabilizer and a preparation method thereof. According to the invention, the emulsion stabilizer is added in a production process of the sticky rice glue to produce a sticky rice wet glue product. The sticky rice wet glue product has strong binding power and can be mixed with water 100%, the wallpaper adhesion area is increased, the decoration cost of users is reduced, the preparation process is simple, the production cost is low, and the product is stable to store and is convenient to use.