Due to the copolymer structure of NVP and VA, the copolymer of vitamin A molecules combines the properties of PVP and PVAC. Comparing the properties of the three products mentioned above, co polyvinylpyrrolidone retains the good water solubility, adhesion, and film-forming properties of PVP, while also having relatively lower water absorption, wider solubility, better plasticity, and stronger surface activity than PVP (note: affinity for hydrophobic surfaces is greater than PVP). Therefore, this product is an excellent tablet adhesive, and the tablets produced by it have the characteristics of high hardness and low brittleness. Under humid conditions, the film can be made with less adhesion, especially suitable for the production and granulation of high-dose, poorly water-soluble, and water sensitive drugs.
At the same time, this product is also an excellent film-forming agent, which is used in the coating solution of tablets, granules, pellets and sugar coated tablet cores and in the spray for local medication. The film coating and spray film made with this product have good flexibility, low water absorption, high plasticity and low viscosity.