| abstract |
Disclosed are a coating agent containing nano-SiO 2 and a preparation method thereof. The coating agent consists of raw materials in parts by weight as follows: 50-60% of a film former, 5-10% of a plasticizer, 2-6% of a dispersant, 10-30% of a colorant, 15-20% of an anti-adherent and 2-5% of the nano-SiO 2 . The coating agent improves the strength of a coating film and the storage stability of a drug. |