10results about How to "Solve easy precipitation" patented technology

The invention relates to the field of building waterproofing, and discloses a plasticizer and a preparation method thereof, a composition for a polyether waterproof coating, the polyether waterproof coating and a preparation method of the polyether waterproof coating. The method for preparing the modified polyether plasticizer comprises the following steps: (1) in a protective atmosphere, in the presence of a base catalyst, stirring and mixing alpha, omega-dihydroxy polydimethylsiloxane and alkylene oxide to obtain an intermediate I; and (2) contacting and mixing a neutralizer with the intermediate I to obtain the modified polyether plasticizer, relative to 100 parts by weight of the alpha, omega-dihydroxy polydimethylsiloxane, the use amount of the base catalyst is 0.1 to 1 part by weight, the use amount of the alkylene oxide is 400 to 900 parts by weight, and the use amount of the neutralizer is 0.12 to 1.2 parts by weight. The silane modified polyether waterproof coating prepared from the modified polyether plasticizer provided by the invention has obviously better weather resistance.

The invention discloses an isooctyl / isononyl / isodecyl pyromellitic acid plasticizer composition as well as a preparation method and application thereof, and the isooctyl / isononyl / isodecyl pyromellitic acid plasticizer composition is prepared from pyromellitic acid or pyromellitic anhydride, isooctyl alcohol (A), isononyl alcohol (B) and isodecyl alcohol (C) through esterification reaction, the molar ratio of the pyromellitic acid or the pyromellitic anhydride to the total alcohol is 1: (4-5); the molar ratio of the isooctyl alcohol (A) to the isononyl alcohol (B) to the isodecyl alcohol (C) is (0-5): (0-5): (0-5). The raw materials used in the synthesis process of the isooctyl / isononyl / isodecyl pyromellitic acid plasticizer composition are safe, the cost is low, the synthesis process is simple, and the isooctyl / isononyl / isodecyl pyromellitic acid plasticizer composition is suitable for industrial processing and production and has excellent heat resistance and low precipitation performance.

The present application relates to the field of polymer manufacturing, and particularly relates to a long-chain branched modification method of rare earth isoprene rubber and / or butadiene rubber, comprising the following steps: S1. performing solution polymerization of isoprene and / or butadiene and isoprene in a non-polar solvent in the presence of a rare earth catalyst to obtain a glue solution containing active polymer molecular chains; S2. when the conversion rate of the polymerization reaction reaches 95% or more, adding a compound branched modifier to the glue solution to perform a branched reaction; wherein the compound branched modifier comprises at least one of a chloride and an alkyl halide and at least one selected from ether compounds and tertiary amine compounds. The branched modifier used in the present application has a strong branching effect, and has good solubility so as to achieve uniform mixing at a molecular level in the glue solution, significantly alleviates the gel side reaction, reduces the gel content, narrows the molecular weight distribution, significantly improves the raw rubber performance, and improves the product uniformity.

The purpose of the present invention is to provide a series type extruded magnetorheological damper, comprising a working cylinder, a piston rod, a piston body of an electromagnetic piston, a magnetorheological fluid, a permanent magnet positioning ring, a permanent magnet ring, and a coil; the left and right end surfaces of the piston body are provided with a plurality of annular grooves spaced in a radial direction. The present invention can solve the existing problems such as small damping force, and at the same time achieves the reduction of the volume of magnetorheological fluid used for work, greatly improves the magnetorheological damping force, and has the advantages of small amount of magnetorheological fluid required and significant magnetorheological effect.

The present invention discloses a polyester and a preparation method and application thereof, wherein the total content of low molecular weight substances in the polyester is 0.1-0.6wt%, and the GPC curve of the low molecular weight substances has the following characteristics: the integral area of ​​the peak with a number average molecular weight Mn greater than 400 is less than 60% of the total integral area. The present invention can effectively solve the problem of easy precipitation on the surface of polyester products, and the prepared polyester product has high gloss.

The invention discloses a diisooctyl / isononyl / isodecyl terephthalate plasticizer composition as well as a preparation method and application thereof, the diisooctyl / isononyl / isodecyl terephthalate plasticizer composition is prepared from terephthalic acid, isooctyl alcohol (A), isononyl alcohol (B) and isodecyl alcohol (C) through esterification reaction, and the molar ratio of terephthalic acid to total alcohol is 1: (2-3); the molar ratio of the isooctyl alcohol (A) to the isononyl alcohol (B) to the isodecyl alcohol (C) is (0-3): (0-3): (0-3). The raw materials used in the synthesis process of the diisooctyl / isononyl / isodecyl terephthalate plasticizer composition are safe, the synthesis process is simple, the cost is low, and the diisooctyl / isononyl / isodecyl terephthalate plasticizer composition is suitable for industrial processing production, high in heat resistance and not prone to precipitation.

The present invention discloses a concentric umbilical cable for unmanned aerial vehicles and a preparation method thereof, and relates to the technical field of umbilical cables for unmanned aerial vehicles. The present application optimizes the cable insulation layer, aiming to reduce the overall weight of the cable and enhance its mechanical properties. In this process, the present application innovatively adopts a macromolecular voltage stabilizer, which effectively avoids the problem of easy precipitation of traditional small molecule voltage stabilizers. In order to improve the compatibility of the macromolecular voltage stabilizer in polypropylene, the present application further grafts it with allylamine.

The purpose of the present invention is to provide an embedded shearing magnetorheological damper, comprising a working cylinder, a piston rod, a piston body, a magnetorheological fluid, a permanent magnet positioning ring, a permanent magnet ring I, a permanent magnet ring II, a permanent magnet ring III, and a coil. The present invention can solve the existing problems such as small damping force, while reducing the volume of magnetorheological fluid used for work, greatly improving the magnetorheological damping force, and has the advantages of small amount of magnetorheological fluid required and significant magnetorheological effect.

The purpose of the present invention is to provide an embedded extruded magnetorheological damper, comprising a working cylinder, a piston rod, a piston body, a magnetorheological fluid, a permanent magnet positioning ring, a permanent magnet ring I, and a permanent magnet ring II; an annular convex portion is respectively provided on the left and right end faces of the piston body. The present invention can solve the problems of the existing small damping force, and at the same time, reduce the volume of the magnetorheological fluid used for working, greatly improve the magnetorheological damping force, and has the advantages of small amount of magnetorheological fluid required and significant magnetorheological effect.

The invention discloses high-calcium digestion-promoting soybean milk and a making method thereof, and belongs to the technical field of soybean milk processing.The making method of the high-calcium digestion-promoting soybean milk comprises the following steps that a sweetening agent, a stabilizing agent and an emulsifying agent are evenly mixed and then added into cooked soybean milk, even mixing is conducted again, milk calcium is added, even stirring is conducted, and then the temperature of the obtained mixed solution is controlled; and adding a hawthorn extracting solution at the temperature, uniformly stirring, and adding citric acid to prepare the high-calcium digestion-promoting soybean milk. The high-calcium digestion-promoting soybean milk provided by the invention comprises raw soybean milk, milk calcium and a hawthorn extracting solution. The calcium content in the soybean milk is increased by adding the milk calcium, and the problem that the milk calcium is easy to precipitate is solved by a compound blending and low-temperature technology, so that the high-calcium digestion-promoting soybean milk can be stored for 12 days at 4 DEG C. The high-calcium digestion-promoting soybean milk prepared by the preparation method disclosed by the invention can be used for remarkably improving the levels of SP substances, gastrin and motilin in serum of a mouse with functional dyspepsia, reducing the residual rate of the stomach of the mouse and improving the propulsion rate of the small intestine of the mouse, and has a remarkable effect of promoting digestion and absorption. By drinking the high-calcium digestion-promoting soybean milk prepared by the preparation method disclosed by the invention, the content of calcium in serum of calcium-deficient mice, the content of calcium in bones, the bone density, the femur index, the calcium absorption rate and the calcium retention rate can be remarkably improved, the content of alkaline phosphatase in the serum is reduced, and the soybean milk has a remarkable calcium supplementing effect.