Polyvinylpyrrolidone is a nonionic polymer compound, also known as crospovidone, crospolyvidone and povidone. Generally,polyvinylpyrrolidone manufacturer would prefer to call it PVP. PVP is one of the most unique N-vinyl amide polymer and extensive variety of fine chemicals. It was studied most and have most applications at the same time.
Just like the shoes we wore,Povidone PVP has different types. What the different is we use K value to distinguish different PVP. The K value of PVP is actually the characteristic value associated with the relative viscosity of the PVP aqueous solution, and the viscosity is the physical quantity associated with the molecular weight of the polymer. Therefore, the average molecular weight of the PVP can be characterized by the K value. Usually the greater the K value, the greater the viscosity, the stronger the adhesion.
Here is the different K value of PVP and its molecular weight.
Besides, different K value of PVP have different characteristics and applications. Polyvinylpyrrolidone PVP in solid drugs can be used not only as a binder, solubilizer, disintegrating agent, extend agent, but also as a film coat and capsules and controlled release film. For example,Povidone K30 made with the film coat and capsule shell in the dry environment is not easy to break, the appropriate amount of povidone and other insoluble polymer together with different thickness and diameter of the permeability of the membrane can adjust the rate of the drug through the membrane, and thus can achieve the effect of controlled release.
No matter the PVP K30 or other K value, the most important factor of effect in application is the quality. And Huafu Chemical,top 5 of PVP manufacturers in China, focus on PVP manufacturing for years. We survive by quality, development by credit.
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