The application of PVP in dispersion polymerization PVP can be used as thickener, stabilizer and particle size regulator in polymer emulsion polymerization and suspension polymerization. Generally speaking, PVP with larger molecular weight (K>60) acts as a protective agent to prevent suspension precipitation, prevent the aggregation of larger particle size particles in the emulsion and dispersion solution, and make it stable. Low molecular PVP is more suitable for dispersing agents, especially for dispersing low density substances. Of course, the molecular weight and its distribution must be compatible with the particle size and distribution of the dispersion. PVP and NVP copolymers can be used in styrene homopolymerization and copolymerization, suspension polymerization of vinyl chloride, methacrylate and polyurethane, emulsion polymerization of acrylic ester and vinyl carboxylate, which can play an excellent role in dispersion stability, particle size control,viscosity adjustment and resin performance improvement. In the suspension polymerization of granular polyurethane urea, some of…

Polyvinylpyrrolidone vinyl acetate copolymer (PVP/VA) is a copolymer formed by the combination of polyvinylpyrrolidone (PVP) and vinyl acetate monomers. It is a versatile polymer that finds applications in various industries. Here are some key points about PVP/VA copolymer: 1. Film-Forming Properties: PVP/VA copolymer has excellent film-forming properties, making it useful in various applications where the formation of thin, flexible films is desired. It can form transparent or translucent films on surfaces. 2. Adhesive and Binder: PVP/VA copolymer is commonly used as an adhesive and binder in various products. It can improve the adhesion of different materials, such as fibers, surfaces, or particles, and provide cohesive strength to the final product. 3. Hair Care Products: PVP/VA copolymer is widely used in hair care products, including hair sprays, gels, mousses, and styling products. It provides hold,flexibility, and humidity resistance to hairstyles. It can also enhance the overall manageability and appearance of the…

Like all homopolymer series products, because the molecular structure of PVPK30 contains hydrophilic groups and oil groups, it can interact with many solvents, so that it can be dissolved in water, and can be dissolved in a variety of alcohols, carboxylic acids, amines and halogenated organic solvents. The solubility is limited only by its own viscosity. Basic information Polyvinylpyrrolidone is a ketone organic matter, which can be used as clarifying agent. Stabilizer; Thickening agent; Tablet filler; Dispersant. Molecular weight of 360,000 polymer PVP is commonly used as beer, vinegar, wine and other clarifying agents. CAS number: 9003-39-8 Molecular formula: C6H9NO Molecular weight: 111.142 Precision mass: 111.068 PSA: 20.310 Logp: 0.690 IUPAC: 1-Ethenylpyrrolidin-2-One Heterogeneous SMILE: C=CN1CCCC1=O Attribute classification Substance category: organic matter Category: Polymer (materials) > Other polymers, apis and intermediates > Blood system drugs Physicochemical property Melting point: 165℃ Density: 1,69G/Cm3 Appearance and shape: White to yellowish white powder Povidone…

PVP has good bonding properties and strong dissolution ability. PVP formed tablets, after taking in the digestive tract, the first rapid dissolution, is the local expansion and disintegration of the tablets, the release of drug fragments, and then accelerate the dissolution and absorption of the drug, play a rapid role in the efficacy of the drug. PVP is soluble in water and most organic solvents, which is particularly important for drugs with few solvents to choose from. It is for these reasons that PVP has been widely used in pharmaceutical tablets, especially abroad. coprecipitantAnother important use of PVP as drug excipients is co-precipitation agent, some drugs have good efficacy, but its fatal disadvantage is that the solubility in water is very small, resulting in its bioavailability is greatly reduced, the use of some water-soluble substances with these drugs co-precipitation, and then improve the solubility and dissolution rate of drugs, to…

Hollow fiber ultrafiltration membrane is the most mature and advanced form of ultrafiltration technology. The outer diameter of hollow fiber is 0.4-2.0mm, the inner diameter is 0.3-1.4mm, and the wall of hollow fiber tube is covered with microholes, and the pore size can be expressed by the molecular weight of the intercepted material, and the molecular weight of the intercepted material can reach thousands to hundreds of thousands. In the function of hollow fiber membrane, the pore diameter and size of the membrane are closely related to the pore-making agent. At present, PVPK30 is the most used. As a better pore-causing agent, PVPK30 mainly affects the pore structure from two factors: thermodynamics and kinetics. Thermodynamics affects the pore structure When the content of PVPK30 in the casting liquid is low, the influence of thermodynamic factors becomes the dominant factor. The addition of PVPK30 reduces the thermodynamic stability of the casting…

Product name: Crosslinked POvidoneCAS login number: 9003-39-8Chemical name: Cross-linked polyvinyl pyrrolidone (PVPP)Physicochemical propertiesWhite or milky white free flowing powder;Insoluble in water, acid, alkali and common solvents;It has strong expansibility in water, does not form gel after expansion, has very good co-solubility, can be complexed with polyphenols, carboxylic acids, tannins and small molecules, and is the first choice of disintegrating agent for high-end tablets; Product standardComply with CP, USP/NF, EP, JP, BP standards Typical characteristicApplyAs a super disintegrator used in preparations, it can promote the release of active substances in tablets, capsules and granules;The crosslinked POvidone fine powder is especially suitable for smaller tablets or directly pressed tablets, and the ultra-fine can be used as a disintegrator for fast dispersing tablets for a lubricated taste.It can be used as adsorbent and complexing agent in preparation to improve bioavailability.Used as a dissolution accelerator to increase the solubility of insoluble drugs.It is widely…

PVP POvidone introduction Polyvinylpyrrolidone (PVP) is a water-soluble polymer formed by linear polymerization of N-vinylpyrrolidone (NVP). Its molecular structure formula is shown in Figure 1.1. In 1938, German chemist Reppe first used acetylene as raw material to synthesize PVP. So far, PVP has developed into non-ionic, cationic, anionic 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 are widely used. PVP not only has the general properties of water- soluble polymers, such as colloidal protection, film formation, bonding, hygroscopicity, thickening, condensation and complexation ability with some compounds, but also has been paid attention to by people for its excellent solubility and physiological compatibility. In the synthetic polymer products, such as PVP is soluble in water, but also soluble in most organic solvents, extremely low toxicity, physiological…

Shanghai Yearn Chemical Science-Tech Co., Ltd., which has a factory of 20,000 square meters in Anji, Zhejiang Province, produces polyethylpyrrolidone of different specifications and models. It is a manufacturer of polyethylpyrrolidone. Welcome to contact our customer service at any time. Product name: PolyvinylpyrrolidoneINCI/CTFA:PVP(Polyvinylpyrrolidone)Pharmacopoeia name: POvidoneCAS number :9003-39-8Chemical structure formula: Medical-grade PVPProduct features: POvidone is white to milky white powder. Soluble in water, alcohol and other organic solvents. It has excellent solubility, film formation and chemical stability.Uses: POvidone is one of the important excipients advocated internationally at present, mainly used in the pharmaceutical industry as a binder, film forming agent,thickener, insoluble drug cosolvent and film industry pore-causing agent. Cosmetic PVPProduct Features: Cosmetic grade polyvinylpyrrolidone exists in powder and liquid form and is easy to water, alcohol and a variety of other organic solvents. It has excellent formability and viscosity. Chemically stable, non-toxic. Used as film forming agent, thickener, lubricant and adhesive…

Product name: POvidone Chemical name: polyvinylpyrrolidone CAS number: 9003-39-8 Appearance: Light yellow to white powder Water content: No more than 5% Solubility: soluble in water and a variety of organic solvents K value: 27-32.4 pH: 3-7 Physicochemical properties White or milky white hygroscopic powder; Soluble in water, alcohol, amine and other organic solvents; Excellent solubility, film formation, chemical stability and solubilization; Strong bonding and complexing ability.The molecular weight of PVPK30 is about 40,000, which is one of the most widely used homopolymer series products. Performance and applicationSolubility and solution propertiesLike all homopolymer series products, because the molecular structure of PVPK30 contains hydrophilic groups and oil groups, it can interact with many solvents, so that it can be dissolved in water, and can be dissolved in a variety of alcohols, carboxylic acids, amines and halogenated hydrocarbons and other organic solvents. The solubility is limited only by its own viscosity.PVPK30 can be…

Polyvinylpyrrolidone (PVP) New developments in the global market and historical opportunities in China In today’s world of fine chemicals, polyvinylpyrrolidone (PVP) undoubtedly occupies an indispensable position. As a multifunctional polymer compound, PVP has been widely used in many fields such as medicine, cosmetics, food and industry since it was first synthesized by BASF in 1938. With its excellent solubility, chemical stability, low toxicity and film formation, PVP not only plays a key role in daily life, but also plays an important role in the high-tech field. Recently, there have been new changes and opportunities in the global PVP market. With BASF, one of the world’s leading producers, experiencing production difficulties, the dynamics of the global supply chain have changed significantly, especially in China. China’s PVP industry has ushered in unprecedented development opportunities in the tuyere of this change. This article will delve into the latest developments in this field, focus…