32results about How to "Moderate solubility" patented technology

This invention discloses the preparing method for a new kind of phosphorus-nitrogen composite flame retardant, especially for pyroammonium phosphate flame retardant. The pyroammonium phosphate flame retardant is synthesized mainly with commercial phosphoric acid and urea; cool to proper temperature after the reaction; adjust reaction by adding appropriate neutralization agent; cool crystallize; centrifuge to get the product. The pyroammonium phosphate flame retardant contains pyromonoammonium phosphate, pyrodiammonium phosphate, pyrotriammonium phosphate and pyrotetroammonium phosphate. Its phosphor content exceeds 25% and nitrogen content exceeds10%. Its non-aqueous solubility is moderate. It is highly effective and nontoxic, so it is broadly used in fireproofing coatings, flame-retardant platics, flame-retardant fibres, flame-retardant textiles, wood goods, and so on.

The invention discloses VOC (volatile organic compound)-free epoxy modified water-borne PU (polyurethane) finish paint and a preparation method thereof. The finish paint comprises: 1) a host formed by even mixing of 80-95 parts of a high-solid-content epoxy modified PU-polyacrylate micro-emulsion, 0.3-2.5 parts of an assistant and 3-6 parts of dodecanol ester by mass; and 2) a curing agent which is a multi-silicon-hydroxyl or multi-siloxy-group compound with the amount of 10-40% of the mass of the host. The epoxy modified water-borne PU finish paint has excellent gloss uniformity, adhesive force, hardness, transparency, fullness, hand feeling and the like. The PU finish paint is widely applicable to decoration and protection of surfaces of various wood products such as wooden furniture, plywood, solid wood floors and the like.

The invention provides a cleaning agent used on electronic elements. The cleaning agent comprises hydrofluoroether, fluoroalcohol and an organic solvent different from hydrofluoroether and fluoroalcohol. With the total weight of the cleaning agent as a reference, the content of fluoroalcohol is higher than 0wt% and lower than 1wt%. The invention also provides a method for applying the cleaning agent.

The invention discloses a method for detecting a residual acrylamide monomer in cationic polyacrylamide. The method comprises the following steps: preparing a 0.01-0.15g/mL mixture from a polyacrylamide sample with the cationic degree being 5-70% and an extractant; extracting the residual acrylamide monomer by using ultrasonic waves to obtain an extracting solution; filtering supernate of the extracting solution, diluting, and measuring the absorbancy of the diluted supernate on an ultraviolet spectrophotometer; and calculating the content of the residual acrylamide monomer in the cationic polyacrylamide by combining an acrylamide standard curve. The method can be used for extracting and detecting the residual acrylamide monomer in water treatment agents, namely the polyacrylamide, with different cationic degrees, and formed colloid has the elasticity; the extracting solution is clear; the extracting of the residual acrylamide monomer is complete and fast; and the content detection is accurate, needed devices are simple, energy is saved, the extracting method is simple and convenient, short in time, and high in extracting efficiency, and requirements on the detection of the residual acrylamide monomer in the polyacrylamide with the different cationic degrees in different sludge-sewage industries can be met.

The purpose of the present invention is to provide a block polyamide acid imide having an appropriate solubility in aqueous alkaline solutions, and block polyimides that are obtained using same and have high transparency and a low coefficient of linear thermal expansion (low CTE). This block polyimide comprises blocks configured from repeating structural units represented by formula (1A) and blocks configured from repeating structural units represented by formula (1B).

The invention relates to the field of refrigeration equipment and discloses refrigerant oil composition and an application thereof. The refrigerant oil composition comprises base oil and a refrigerant, wherein the refrigerant is propane; the base oil contains a compound shown as formula I in the description, in the formula I, R1 is H, R2 is H or C1-C18 alkyl, and m is an integer larger than or equal to 1. The invention further discloses a compressor with the refrigerant oil composition serving as a circulating cooling liquid system as well as a refrigerating circulating device. The base oil and the refrigerant propane have good solubility, the lubricity is good, so that sufficient cooling can be also realized even when the dosage of the refrigerant is lower, and the safety is guaranteed while the cooling effect is guaranteed.

The present invention discloses silicate fertilizer and its preparation process. The silicate fertilizer has silicate content not less than 10 % and its saturated leached liquid has pH value not greater than 6.5. It is prepared with sodium silicate or calcium silicate material, and through neutralizing with acid to prepare silicic acid colloid solution, precipitating, filtering, washing, neutralizing, drying and crushing. The silicate fertilizer has the features of high silicate content, fast and long acting, silica utilizing rate up to 100 %, moderate solubility, capacity of greatly raising the yield of crop, etc.

The invention discloses a solvent and a method for preparing a high-performance metal halide perovskite film, and an application, and belongs to the technical field of microelectronics. The solvent for preparing the high-performance metal halide perovskite film comprises the following components in parts by volume: 3 parts of DMF and 1-2 parts of GBL. The solvent can effectively control the morphology of the perovskite film, so that the performance, efficiency and stability of a device are improved; and the solvent is used for industrial production and has the characteristics of simple and feasible method, low cost, strong controllability and the like.

The invention relates to a silicic acid fertilizer and a preparation technology thereof. The content of silicic acid in the silicify fertilizer is higher than 10%, and the pH value of a saturation extract is lower than 6.5. The silicic acid fertilizer is prepared by the following steps: sodium silicate or material blocks containing calcium silicate are used as raw materials, raw materials are neutralized with acid, a silicic acid colloidal solution is prepared, a deposition treatment is carried out, after filtering, washing, neutralization, drying and crushing, a finished product is obtained. The prepared silicic acid fertilizer has the following characteristics: the silicic acid content is high; after the fertilizer is applied to fields, the soil does not cake and deteriorate; the fertilizer is long-term effective, wherein utilization rate of silica is 100%; the solubility is moderate and the fertilizer efficiency is high, and the fertilizer can be used as a base fertilizer and an additional fertilizer; outputs of crops can be greatly increased; the fertilizer can be prepared into a complex fertilizer with a nitrogenous fertilizer, a phosphate fertilizer, a potash fertilizer and other common fertilizers, and usage of the fertilizer is convenient; the preparation technology is simple, investment is low and production cost is low.

The invention provides a Jevtana-containing injection composition and a preparation method thereof. A mass ratio of Jevtana, polysorbate to citric acid in the Jevtana-containing injection composition is 1: 20-30: 0.05-0.25 and a tert-butyl alcohol residual quantity ratio is less than 0.5%. The preparation method utilizes tert-butyl alcohol as a solvent and a mass ratio of Jevtana to tert-butyl alcohol is 1: 20-45. The preparation method comprises the following steps of adding polysorbate-80 and citric acid into tert-butyl alcohol, carrying out stirring for dissolution, adding Jevtana into the solution for dissolution, carrying out sterilization filtration, carrying out split charging and carrying out vacuum removal of tert-butyl alcohol.

The invention relates to the technical field of a medium element fertilizer, and especially relates to a technology for producing the medium element fertilizer by using phosphogypsum. The technology comprises the following steps: performing phosphogypsum pretreatment, mixing phosphogypsum and a soil conditioner, performing fragmentation and granulation on a mixture to obtain the granular-fertilizer, and performing steps of primary drying, primary cooling, secondary drying, and secondary cooling to obtain a product. The free water proportion in the pre-treated phosphogypsum is 12-15%, the granular-fertilizer is heated to 75-85 DEG C while primary drying, the proportion of the free water in the granular-fertilizer is reduced to 10-13%, the temperature of the granular-fertilizer after primarycooling is reduced to 65 DEG C, the granular-fertilizer after secondary drying is heated to the temperature of 75-80 DEG C, and the proportion of the free water in the granular-fertilizer is reducedto lower than 8%, A granulation step is carried out under normal temperature without addition of water, and is cold condition waterless granulation. The by-product realizes reasonable utilization, theproblem of soil acidifying and salinization in our country can be solved, and the technology perform active effects for reducing crops fertilizer damage and increasing the crops quality.

To provide a refrigerating machine oil which has appropriate compatibility with and solubility in a hydrocarbon refrigerant, can maintain a viscosity which does not adversely affect its lubricity, can reduce the filling amount of the refrigerant and, in addition, has excellent lubricity, electrical insulating properties, stability and the like. The refrigerating machine oil for a hydrocarbon refrigerant comprises an ester of one or more kinds of a 5-10C neopentyl polyol with one or more kinds selected from a 5-9C linear or branched monovalent fatty acid as the major component.