PVP K30 and PVP K90

Differences of pvpk30 and pvpk90:

The difference is solubility and miscibility.

Polyvinylpyrrolidone is a polymer of vinylpyrrolidone with different molecular weights. It is easily soluble in water and does not undergo electrolysis. Its aqueous solution is miscible with cellulose series solutions. It can also be mixed with nonionic, anionic or cationic components such as salicylic acid.

PVPK series products can be settled by adding a large amount of salt, and K90 is easier to settle than K17.

The solubility of PVP in different organic solvents varies greatly. The following table contains a series of organic solvents.

PVPK series can be dissolved in these solvents to obtain a solution containing at least 10% PVP.

Storage stability

When the pH value of the aqueous solution is higher than 6, it will increase when stored at a higher temperature. Acidified solution (concentration less than 30%) has a tendency to agglomerate during storage, which can be prevented by adding stabilizers. It is not recommended to use OH or NH2 stabilizers.

Application:

Suspending agent, dispersing agent, emulsifier

Adding PVPK to water-soluble suspending agents, dispersing agents, and emulsifiers can increase stability. PVP can form a thin layer on the surface of the colloidal particles, which can prevent its condensation.

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