Polyvinylpyrrolidone Surfactant PVP

English name：
Polyvinylpyrrolidone
English alias：
K-30;Povidone;Pop;Polyvinylpyrrolidone K 25;Polyvinylpyrrolidone K 30;Polyvinylpyrrolidone K 90;Polyvinylpyrrolidone K 60;Polyvinylpyrrolidone-Divergan RS
Molecular weight：MW:58000

PVP K-30 meidical grade

Nature of PVP
polyvinyl 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 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 PVP aqueous solution, and the viscosity is a physical quantity related to the molecular weight of polymers, so the average molecular weight of PVP can be characterized by K value. Generally, the greater the K value, the greater the viscosity and the stronger the adhesion.
Usage
As a synthetic water-soluble polymer compound, PVP has the general properties of water-soluble polymer compounds, colloidal protection, film formation, adhesion, hygroscopic, solubilization or condensation, but its most distinctive, so people pay attention to its excellent solubility and physiological compatibility. In synthetic polymers such as PVP both soluble in water, but also soluble in most organic solvents, very low toxicity, good physiological compatibility is rare, especially in medicine, food, cosmetics, which are closely related to people’s health in the field, with the reduction of the price of its raw material butyrolactone, will show its good prospects for development. The following is a specific introduction to its application areas:
1. Medicine and health
PVP has excellent physiological inertia, does not participate in human metabolism, and has excellent biocompatibility, and does not form any irritation to the skin, mucous membranes, eyes, etc. From a biological point of view, the molecular structure of PVP is similar to that of a simple protein model, and even its water solubility, its ability to cooperate with some small molecules, and its ability to be precipitated by some protein precipitators such as ammonium sulfate, trichloroacetic acid, tannic acid and phenols are also soluble with proteins. As a result, PVP is widely used as an excipient in pharmaceutical preparations. Specific applications are as follows: ① used as a binder in preparations ② co-precipitant ③ as a co-solvent or crystallization inhibitor in injections ④ coating or film forming agent ⑤ delay agent, slow release agent controlled release of drugs can extend the action time of drugs ⑥ artificial vitreum and cornea ⑦ surgical wrap band. In addition, PVP can also be used as colorant and X-ray contrast agent; It can be used in tablets, granules, water and other dosage forms. It has the functions of detoxification, hemostasis, increasing dissolution concentration, preventing peritoneal adhesion and promoting sedimentation rate.
2. Food processing
PVP itself is not carcinogenic, has good food safety, can form complexes with specific polyphenol compounds (such as tannins), and is mainly used as a food clarifying agent and stabilizer in food processing such as beer, juice, wine.
3. Daily cosmetics
In the consumption structure of PVP, the cosmetics industry in developed countries accounts for 30% to 50%, and China accounts for 70% to 80%. Because PVP has very low toxicity and physiological inertia, it is not irritating to the skin and eyes, and has a long-term use record in the field of medicine, so it is safe to use in cosmetics. In daily cosmetics, PVP and copolymer have good dispersion and film formation, PVP has a protective colloidal effect in emulsion, can be used in fat and non-fat paste, as a setting liquid, hair spray and mousse setting agent, hair care agent, shampoo foam stabilizer, wave setting agent and hair dye dispersant and affinity agent. Add PVP to cream, sunscreen and hair remover to enhance wetting and lubrication.
4. Detergent field
PVP has anti-fouling reprecipitation performance, can be used to prepare transparent liquid or heavy dirt detergent, adding PVP in detergent has a good anti-color effect, and can enhance the cleaning ability, washing fabrics can prevent synthetic detergent on the skin stimulation, especially for synthetic fibers, this performance is more prominent than carboxymethyl cellulose (CMC) detergent. PVP can be combined with borax as an effective ingredient in the formulation of phenol-containing disinfectant detergent. The detergent mixed with PVP and hydrogen peroxide has the function of bleaching and killing bacteria.
5. Textile printing and dyeing
PVP has a good affinity with many organic dyes, and it can be combined with hydrophobic synthetic fibers such as polyacrylonitrile, ester, nylon and fibrous materials to improve dyeing power and hydrophilicity.
6. Paints and pigments
PVP coated paint, coating film transparent without affecting the color, improve the gloss and dispersion of paint and pigment, improve thermal stability and improve the dispersion of ink and ink.
7. Polymer process
Polyvinylpyrrolidone, as a polymer surfactant, can be used as dispersant, emulsifier, thickener, leveling agent, particle size regulator, anti-reprecipitating agent, coagulant, co-solvent and detergent in different dispersion systems.
8. Other aspects
PVP can be used as a gelling agent for tertiary oil recovery to improve oil recovery rate. As an additive for photosensitive materials, it helps to reduce the emulsibility and enhance the overlay ability of developed images. It is used as thickener, dispersion stabilizer and bond regulator in polymer polymerization. In the paper industry as a dispersant, in acrylamide gasification reaction as a cocatalyst. PVP is currently in the separation film, light curing resin, laser disc, drag reduction coatings, building materials, steel and electroplating and other fields of application is also rising.