5results about How to "Low initial viscosity" patented technology

This invention relates to the field of water treatment chemicals, and discloses a hydroxyl-based coagulant aid, its preparation method, and its application. The coagulant aid is composed of solid polyaluminum chloride, polyvinyl alcohol, urea, an aqueous solution of alkyl glycosides, sodium gluconate, sodium tetraborate decahydrate, triethanolamine, deionized water, and glacial acetic acid for pH adjustment. This invention reduces the system viscosity through urea, and, combined with the spatial isolation of alkyl glycosides and the coordination chelation of sodium gluconate, inhibits the salting-out and phase separation of polyvinyl alcohol induced by high concentrations of polyaluminum chloride. The system utilizes sodium tetraborate decahydrate to construct a pH-regulated delayed cross-linking mechanism, maintaining liquid-phase homogeneity under slightly acidic conditions. When introduced into neutral or weakly alkaline water, the agent can undergo in-situ cross-linking with the water to form a network structure, which, in conjunction with inorganic aluminum salts, achieves the netting and sedimentation of suspended particles. This invention balances long-term storage stability in high-salt systems with highly efficient turbidity removal performance.

The invention relates to the technical field of batteries, in particular to a dispersing agent and a preparation method and application thereof. The dispersing agent is a copolymer and comprises a main chain formed by copolymerization of an oil-soluble olefinic unsaturated monomer unit M1 and an olefinic unsaturated monomer unit M2 containing anhydride and / or carboxyl; the polymer side chain R1 is grafted on the M2 unit of the main chain and contains an ether bond and / or an ester bond; and the side chain R2 is grafted on the M2 unit of the main chain and contains an amide group. Wherein the polymer side chain R1 guarantees the long-term dispersion stability of the particles through a steric hindrance effect; the side chain R2 captures moisture and neutralizes acidic impurities through an amide group of the side chain R2, so that chemical passivation of the lithium supplementing agent is realized, and a gas production side reaction is inhibited from the source; and the main chain further optimizes the overall stability of an electrode interface by enhancing the compatibility of each component, so that the synergistic improvement of the processability, storage stability and electrochemical cycle performance of the slurry is realized.

The application discloses a water control blocking agent for edge and bottom water thickened oil reservoir, which is composed of the following components in percentage of the total mass of the water control blocking agent: water-soluble resin 3-40%, flexible polymer 0.1-5%, coagulant 0.01-1%, suspending agent 0.01-2%, and water as the balance. The application also discloses a preparation method of the water control blocking agent for edge and bottom water thickened oil reservoir, which comprises the following steps: (1) pouring water into a reaction container according to the formula, and then sequentially adding water-soluble resin, suspending agent, oxygen scavenger and toughening agent according to the formula, stirring for at least 20 minutes to obtain a first mixed solution; (2) adding flexible polymer to the first mixed solution according to the formula, stirring at room temperature for at least 4 hours until completely dissolved to obtain a second mixed solution; and (3) adding coagulant to the second mixed solution according to the formula, and continuing to stir for at least 30 minutes to obtain the water control blocking agent for edge and bottom water thickened oil reservoir.

The invention belongs to the field of adhesives, and provides PMMA (polymethyl methacrylate) glue with viscosity regulated and controlled by glacial acetic acid and a preparation method of the PMMA glue. According to the invention, a dual design of synergistic viscosity reduction of a PMMA matrix and free glacial acetic acid and slow release regulation and control of the PMMA-coated glacial acetic acid microcapsule is adopted, accurate regulation and control of the viscosity in a range of 500-50000 mPa.s are realized by controlling the dosage of glacial acetic acid in a range of 2-15 parts by mass, and meanwhile, the microcapsule component gradually releases glacial acetic acid in a glue drying process, so that the viscosity of the microcapsule is reduced, and the viscosity of the microcapsule is reduced. The viscosity rise caused by solvent volatilization is compensated, low viscosity, easy construction and high cohesion strength after drying are guaranteed, the problems that the construction performance and curing strength of traditional PMMA glue are difficult to balance, a high-solid-content system is difficult to defoam, and the storage viscosity stability is poor are solved, and the PMMA glue has wide industrial application value.

This invention discloses a temperature- and salt-resistant crosslinked polymer oil displacement agent and its preparation method, belonging to the field of petroleum extraction technology. It comprises two components: Component A and Component B. Component A is an aqueous solution of a quaternary copolymer, comprising, by mass percentage: 0.3%–0.8% quaternary copolymer, 0.1%–0.3% composite stabilizer, 0.05%–0.15% pH adjuster, with the balance being formation water. Component B is an aqueous solution of a composite crosslinking agent, comprising, by mass percentage: 0.2%–0.6% organoboron crosslinking agent, 0.1%–0.4% phenolic resin crosslinking agent, 0.05%–0.2% amino-modified nano-silica, with the balance being formation water. This invention employs quaternary copolymerization technology, simultaneously introducing sulfonic acid groups, pyrrolidone rings, and acid anhydride groups into the polymer molecular chain. The sulfonic acid group is insensitive to divalent cations and can significantly improve the salt resistance of the polymer; the pyrrolidone ring has good thermal stability and hydrolysis resistance; the acid anhydride group can react chemically with the amine-modified nano silica to form chemical crosslinking points.