PVP, a kind of non-ionic polymer, is one of the most characteristic and most widely studied fine chemical in N- vinyl amide polymer.

The K value of PVP is actually the characteristic value related to the relative viscosity of PVP aqueous solution, and the viscosity is the physical quantity related to the molecular weight of polymer, so the K value can be used to characterize the average molecular weight of PVP. The larger the K value is, the greater the viscosity is, the stronger the adhesion.

PVP is a synthetic water-soluble polymer compound, has the general properties of water soluble polymer, colloid protection, film, adhesion, solubility or aggregation, but the most characteristic is the excellent solubility and biocompatibility. In the synthesis of polymer like PVP is soluble in water, but soluble in most organic solvents, low toxicity, good physiological compatibility is rare, especially in medicine, food, cosmetics, which is closely related to people's health in the field, with the raw material prices lower butyrolactone, will show a good the prospect of its development.

Many people confuse about the K value of PVP and the corresponding molecular weight, so here is the K value of each model and its molecular weight of PVP:

Molecular Weight of PVP K series:

PVP K12          3000-7000

PVP K15          8000-12000

PVP K17          10000-16000

PVP K25          30000-40000

PVP K30          45000-58000

PVP K60          270000-400000

PVP K90          1000000-1500000