Abstract: Disclosed are a method for updating data of a refrigerator freshness reservation model, a device and a storage medium. The method includes: S1, collecting refrigerator information of a plurality of users, wherein the refrigerator information of each user includes an item identifier corresponding to each of stored items in a refrigerator, and a usage frequency; S2, performing statistical computation on the refrigerator information to acquire a mean and a variance of usage frequencies corresponding to each food identifier; and S3, screening the refrigerator information based on the acquired mean and variance. In the present invention, uploaded data are automatically screened in an optimizing manner by mutual cooperation between the means and the variances, such that the uploaded data can be filtered, thereby maintaining the calculation accuracy while reducing the pressure on a server.

Abstract: The present disclosure relates to a method for preparing a waterborne polyurethane material, including the following acts: mixing polyester polyol and toluene diisocyanate, heating up to react, adding a mixed solution of dimethylolpropionic acid and butanediol to react, adding polyethylene glycol to react, adding trimethylolpropane to react, adding a catalyst to react and testing NCO value until reaching 1-3% of the theoretical value, adding a solvent and stirring uniformly to obtain a polyurethane prepolymer, cooling the prepolymer to <15° C., adding triethylamine for neutralization, adding pure water for thorough emulsification, adding ethylenediamine for chain extension, removing the solvent to obtain the waterborne polyurethane material. The present disclosure also relates to a method for preparing gloves, including: cleaning a mold, adding coagulants and demoulding agents, immersing in the waterborne polyurethane added with cross-linking agents, and then drying.

Abstract: An antifouling dispersant composition having an alcohol polyoxyethylene (EO) ether (EO number 1-14), represented by the general formula (I), wherein R is an alkyl with about 3-20 carbon atoms; and n is 1-14.

Abstract: A synergistic polymerization inhibitor composition, the composition having a copper salt, and a manganese salt; a copper salt or a manganese salt, and a cationic polymer; or a phenothiazine and a manganese salt. A method for inhibiting polymerization of unsaturated polymerizable monomers, the method providing adding a synergistic polymerization inhibitor composition to an methacrylic acid manufacturing system or component thereof, the composition having a copper salt, and a manganese salt; a copper salt or a manganese salt, and a cationic polymer; or a phenothiazine and a manganese salt.

Abstract: Methods and compositions for inhibiting carbonyl-based fouling of basic wash systems. The methods comprise contacting the hydrocarbon stream that is or will be subjected to such washing with water soluble or water dispersible copolymers comprising repeat units of 1) ethylenically unsaturated monomers such as acrylic acid with one or more 2) other repeat units such as alkyl acrylates, allyl ethers, ethoxylated allyl repeat units, etc. In other embodiments, a third repeat unit 3) is present and may comprise a hydrophobic moiety such as a styrene repeat unit. The compositions may be terpolymers comprising repeat units 1), 2), and 3).

Abstract: Methods are disclosed for reducing oil in water emulsions in coking processes. One exemplary method comprises: providing an aqueous stream with an oil in water emulsion; providing a treatment composition, wherein the treatment composition comprises at least one cationic polyacrylamide; and contacting the aqueous stream with the treatment composition.

Abstract: Provided are methods and compositions for inhibiting carbonyl based fouling materials of basic wash systems. Said methods comprise contacting the hydrocarbon stream that is or will be subjected to said wash systems with water soluble or water dispersible copolymers. Said copolymers comprise repeat units of ethylenically unsaturated monomers such as acrylic acid with other repeat units such as alkyl acrylates, allyl ethers, ethoxylated allyl repeat units, etc. In other embodiments, a third repeat unit is present and may comprise a hydrophobic moiety such as a styrene repeat unit.

Abstract: Methods are disclosed for reducing oil in water emulsions in coking processes. One exemplary method comprises: providing an aqueous stream with an oil in water emulsion; providing a treatment composition, wherein the treatment composition comprises at least one cationic polyacrylamide; and contacting the aqueous stream with the treatment composition.

Abstract: The invention relates to a polymer comprising structural units of formula and formula wherein R1, R2, R5 and R6 are independently hydrogen, a methyl group, or —COOH, only one of R1 and R2 or R5 and R6 is —COOH; R3 and R7 are independently hydrogen, or a methyl group; R4 is —COOH, —CONH2 or —OH, when R4 is —OH, R1, R2 and R3 are respectively hydrogen; and R8 is —COO, —CONH, or —O—, when R8 is —O—, R5, R6 and R7 are respectively hydrogen. Methods for preparing and using the polymer are also described herein.

Abstract: The present invention concerns a method of detecting cationic polymers comprising: obtaining a target water sample containing a cationic polymer; adding a polymer dispersant solution and a phosphate solution to the target water sample, the polymer dispersant solution is comprised of a polymer dispersant with calcium and magnesium hardness and the phosphate solution is comprised of a phosphate; standing the target water sample; and measuring the turbidity of the target water sample; comparing the turbidity of said target water sample with a calibration curve of the turbidity of samples containing known concentrations of cationic polymers to determine the concentration of cationic polymers in said target water sample.

Abstract: A method has been found for the inhibition of microbial biofilm on surfaces in contact with systems, such as aqueous systems. In accordance with the method, an effective amount of a modified tannin biofilm control agent is fed to the system water. The modified tannin biofilm control agent comprises a reaction product of an amine, an aldehyde and tannin and provides a good environmental profile.

Abstract: A packaging system for an acidic product and a method for adding the acid product to a water system, wherein the packaging system has a multi-layer packaging film with a water-soluble outer layer and an inner layer comprising a pH-sensitive polymer. The inner layer is stable at the pH of the acidic product and dissolves when exposed to a pH greater than dissolution pH of the inner layer, the dissolution pH being greater than the pH of the acidic product. In one example, the dissolution pH of the inner layer is between 5 to 8. When the pH of the water system reaches the dissolution pH, the product is released to the water system.

Abstract: A method of treating an algal containing aqueous medium comprises adding an effective amount of the treatment composition to the aqueous medium wherein the treatment composition comprises 1) a) a water soluble cationic quaternary ammonium starch or b) a water soluble quaternary ammonium starch/gum blend or c) a water soluble modified tannin and 2) a metal containing inorganic coagulant. In certain aspects of the invention, the so-treated algal containing aqueous medium is filtered such as by microfiltration and/or ultrafiltration to result in potable water. In another aspect of the invention, the algal containing aqueous medium is an agglomerated mass of algae with water dispersed throughout the mass. The method comprises a step of separating the algae from the water, thereby harvesting the algae for further processing such as may ultimately lead to the production of biodiesel fuel.

Abstract: The present invention concerns a method of detecting cationic polymers comprising: obtaining a target water sample containing a cationic polymer; adding a polymer dispersant solution and a phosphate solution to the target water sample, the polymer dispersant solution is comprised of a polymer dispersant with calcium and magnesium hardness and the phosphate solution is comprised of a phosphate; standing the target water sample; and measuring the turbidity of the target water sample; comparing the turbidity of said target water sample with a calibration curve of the turbidity of samples containing known concentrations of cationic polymers to determine the concentration of cationic polymers in said target water sample.

Abstract: The invention relates to a polymer comprising structural units of formula and formula wherein R1, R2, R5 and R6 are independently hydrogen, a methyl group, or —COOH, only one of R1 and R2 or R5 and R6 is —COOH; R3 and R7 are independently hydrogen, or a methyl group; R4 is —COOH, —CONH2 or —OH, when R4 is —OH, R1, R2 and R3 are respectively hydrogen; and R8 is —COO, —CONH, or —O—, when R8 is —O—, R5, R6 and R7 are respectively hydrogen. Methods for preparing and using the polymer are also described herein.

Abstract: An improved stabilized biocidal delivery system has been found which increases the efficiency and effectiveness of introducing antimicrobial compounds into complex bio-film matrices through the use of liposome vesicular carriers, thereby removing the bio-fouling in industrial water bearing systems, including piping, heat exchanges, condensers, filtration systems and fluid storage tanks. The improved stabilized biocide is comprised of a vesicle encapsulated biocide that is stabilized against chemical and heat degradation over longer periods of time than previously possible through the incorporation of a stabilizer compound.