The application of PVP in organic pigments: The organic pigment particles obtained by chemical synthesis method have a large specific surface range, the specific surface is 8-100m2/g, and the usual mechanical treatment method can only make the pigment particle size reach 70-100 microns, and can not be directly used. Therefore, people use surface treatment technology to change some properties of the pigment, such as dispersion, thermal stability, solubility resistance, chemical inertness and optical solid properties. In fact, the surface treatment of pigments is to use some method to prevent the particles from growing before the pigments gather into large particles, and the best way is to protect the pigment particles and give them the required performance. PVP has good film forming properties, soluble in water and insoluble in some organic solvents, most of the substances used in pigment solvents make organic solvents, and PVP has better film forming properties with…

The application of PVP in cosmetics industry Polyvinylpyrrolidone (PVP), referred to as polyvidone (povidone), is a polymer compound produced by the polymerization of N-vinyl-2-pyrrolidone. PVP is a former “artificial plasma” solubilizer with good physiological safety characteristics. PVP has good physiological inertia, does not participate in human metabolism, and has good biocompatibility, and does not form any obvious stimulation to skin, mucosa, eyes and other parts and organs PVP and its copolymers are used as film agents and hair styling agents in various hair care products, as emollients and moisturizers in skin creams, as base materials in eye and facial cosmetics and lipgloss, as emulsifying stabilizers in cream lotions, as pigment dispersants in hair dyes, eyeliner and lipgloss, as stain removers and gels in toothpastes, etc. Used as a conditioner in hair curlers, shaving products and deodorants. PVP is also used as an antidote in various cosmetics, which can effectively relieve…

PVP can be used as binder, excipient, coating agent, disintegrator, co-solvent, germicidal disinfectant, solubilizer, sustained-release agent, capsule shell, dispersion stabilizer, film forming agent and so on in the field of medicine and health. In some developed countries, such as the United States, Germany, Japan, etc., the application of PVP in the field of medicine and health accounts for about 40%-55% of the total consumption of PVP.Application of PVP as drug excipients PVP has good bonding properties and strong dissolution ability. PVP formed tablets, after taking in the digestive tract, first quickly dissolve, so that the tablet local expansion and disintegration, the release of drug fragments, into It accelerates the dissolution and absorption of the drug and plays a role in the rapid play of the drug effect. PVP is soluble in water and most organic solvents. It is for these reasons that PVP has been widely used in pharmaceutical tablets,…

Application of PVP in polymerization reaction:The viscosity and colloidal protection function of PVP make it have important applications in polymerization reactions, especially emulsion polymerization. Adding a small amount of PVP in suspension polymerization can play a role in dispersion stability, thickening and particle size control, such as suspension polymerization of methacrylate and polyamine ester. In the emulsion polymerization system of acrylate and vinyl acetate, appropriate amount of PVP-K60 or PVP and styrene copolymer was added to make the reaction system disperse uniformly and stably, and the viscosity, polymer particle size and particle size distribution could be adjusted by adjusting the molecular weight and dosage of PVP, and some properties of the resin could be improved. When -3%PVPK60 was added to the suspension polymerization of polyaminase, the polymer powder size was uniform, the particle size was between 800-100 microns, and the residual monomer was less than 0.5%. Can be used in…

Application of PVP in winemaking:Low alcohol wine made from barley, corn, hops, grapes and other plant raw materials, rich in a variety of proteins and polyphenols, these proteins and polyphenols exist in the wine as colloidal particles, when long-termPlace or temperature below 0 degrees, higher than 20 degrees may produce flocculation precipitate, resulting in liquor become cloudy, affect its flavor, some polyphenols are carcinogens, in liquor is also harmful to human body. The turbidity phenomenon is especially common in beer, in addition to the turbidity caused by the above-mentioned colloidal particles flocculation, there is also the turbidity phenomenon caused by the ruridity caused by some biological impurities, and the beer will also produce cold turbidity when refrigerated. These are the technical problems that must be solved in the beer production process, otherwise it is difficult to ensure the quality of the wine. The main polyphenols, especially anthocyanins, catechuic acids and…

With the rapid development of modern science and technology, the continuous improvement of people’s living standards and the rapid development of computer technology, the requirements for all kinds of office paper, printer ribbon, ink, ink and other office supplies are also getting higher and higher. The paper should be white and flat, the ink, ink, etc., requires strong adhesion and non-penetration, thin and not wrinkly, uniform texture and smooth surface, in short, it is necessary to have satisfactory hardness, coating, peeling strength and finish. The ink requires fluent writing, clear and uniform lines, should not precipitate, should not fall off, should not fade, do not block the pen. The requirements for printing ink and coating with magnetic powder ink are higher, because sometimes it is necessary to print plastic products and maintain long-term color proofing, such as ID card production, film copying and so on. In all these office supplies,…

polyvinylpyrrolidone molecular structure： Polyvinylpyrrolidone molecular formula：(C6H9NO)n Polyvinylpyrrolidone, non-ionic polymer compound, white or milky white powder or particle, is a hygroscopic and easy to flow powder, odorless or slightly odorless, soluble in water, alkali, acid and polar organic solvents, with strong expansion properties and complex ability with a variety of substances. Since polyvinylpyrrolidone is soluble in both water and most organic solvents, has low toxicity and good biosolubility, it is used in medicine, food and cosmetics, which are related to people’s health. Nature of PVPpolyvinyl pyrrolidone (PVP), a non-ionic polymer, is the most distinctive and widely studied fine chemical variety among N-vinyl amide polymers. At present, it has developed into non-ionic, cationic, anion 3 categories, industrial grade, pharmaceutical grade, food grade 3 specifications, relative molecular mass from thousands to more than one million homopolymer, copolymer and crosslinked polymer series products, and with its excellent unique properties have been widely used.PVP is…

Introduction of PVPVA copolymer: PVPVA copolymer is a water-soluble copolymer synthesized from monomer N-ethylene-pyrrolidone (NVP) and vinyl acetate (VAc) in a certain proportion Polymer, divided into cosmetic grade and pharmaceutical grade two grades, of which pharmaceutical grade products are mainly PVP-VA64, in the United States Pharmacopoeia, European Pharmacopoeia and Japanese pharmacopoeia Included. PVP/VA copolymers are thermoplastic resins with molecular weights ranging from 20M to 50M. Glass conversion temperature from 55°C to 109°C, with the increase of VP content, suction Water performance increases. Pharmaceutical grade PVP-VA64 copolymer is a kind of high performance film forming adhesive. High solubility in water and a variety of organic solvents, high adhesion, and has the ability to complex. Although its unique properties can be used in the formulation of pharmaceutical preparations and afterbirth materials, it is currently mainly used as a tablet binder.     Copolymer molecular structure formula In general, the weight average molecular…

Chemical name: 1, 2-hexadiolCASNo: 6920-22-5Molecular formula: C6H14O21, 2-hexadiol is a very safe and effective humectant with a wide range of antibacterial and preservative properties.Physical and chemical dataAppearance: Colorless transparent liquidSmell: Characteristic smellContent: ≥99%Density (20℃) : 0.946-0.956Refractive index (25℃) : 1.437-1.447Solubility: Soluble in water1, 2-hexadiol is a kind of polyol, the appearance is colorless and transparent, as a cosmetic raw material, has a good bactericidal and moisturizing effect (antibacterial mechanism: it can enter the cell membrane of microorganisms, and then destroy the integrity of the cell membrane, so that the cell fluid penetrates out, and finally leads to the death of microorganisms), and has no sensitive side effects on human skin. 1, 2-hexadiol has good miscibility with other substances (easily soluble in water, ethanol, etc.), and can be well combined with other anti-microbial substances to play an antibacterial and anti-sensitive role. In addition, there are also reports that 1, 2-hexanediol is…

Povidone is a water-soluble synthetic polymer, the key ingredient is N-vinylidenone. It is a polymer with high adhesive properties, and is important as a binder for wet granulation of solid preparations. Its properties make it a critical excipient in various oral liquid systems, suspensions and local drug development applicationsSolubility: easily soluble in water and halogenated hydrocarbon solvents, alcohols, amines, nitroalkanes and low molecular fatty acids, insoluble in acetone, ethyl, turpentine, aliphatic hydrocarbons and alicyclic hydrocarbons and other few solvents. It is compatible with most inorganic salts and various resins.Properties: Hydrophilic and easy to flow white or nearly white powder, with a slight odor. PVP is divided into four stages according to its average molecular weight size, which is usually expressed by the K value, and different K values represent the corresponding average molecular weight range of PVP. The K value is actually an eigenvalue related to the relative viscosity of…