Application of polyvinylpyrrolidone in medicine（2）and other applications
（5）Preparation of stable vitamin preparations
Highly stable oil-soluble vitamins (A, D, E) can be prepared as solid solutions in hydrogenated oils or waxes, and then dispersed as very fine beads in a plasticizer-containing gel cavity. Such products are fairly stable even after prolonged exposure to relatively high-temperature air.
(6) Used as a stabilizer in oral liquid preparations
PVP K-90 has a wide range of applications in oral liquid dosage forms. can be used to obtain a homogeneous and stable product.
(7) Application in ophthalmology and other pharmaceutical fields
①1 percent 2 percent concentration of K90 can be used to relieve eye irritation; ②It can enhance the effect of contact lens cleaning solution; ③Compared with HPMC, methylcellulose or polyvinyl alcohol when benzalkonium chloride is used in the prescription, there are few compatibility problems; ④ the adhesion damage of the peeled-in contact lenses is extremely low; ⑤ compared with other polymers, it has the highest biocompatibility for 0.1 percent tropicamide; For artificial tears, it is better than polyvinyl alcohol; ⑦ It can be used as a pore-forming agent for the controlled release layer in long-acting eye masks.
Other applications:
PVP can be used in the manufacture of protective colloid and silver halide suspending agents. In the silver halide development process, using PVP as an auxiliary agent can avoid the generation of two-color spots. PVP is a very stable acidic gelling agent, which is sensitive to salt concentration and is particularly useful in polymer flooding with high salt concentrations in aqueous clay regions. PVP and other organics are mixed with water solution and injected into the oil well, which can improve the oil recovery rate of the oil field. With the deepening of research, the future development of PVP will open up new application fields.