Polyvinylpyrrolidone vinyl acetate copolymer

Polyvinylpyrrolidone vinyl acetate copolymer (PVP/VA) is a copolymer formed by the combination of polyvinylpyrrolidone (PVP) and vinyl acetate monomers. It is a versatile polymer that finds applications in various industries. Here are some key points about PVP/VA copolymer:

1. Film-Forming Properties: PVP/VA copolymer has excellent film-forming properties, making it useful in various applications where the formation of thin, flexible films is desired. It can form transparent or translucent films on surfaces.

2. Adhesive and Binder: PVP/VA copolymer is commonly used as an adhesive and binder in various products. It can improve the adhesion of different materials, such as fibers, surfaces, or particles, and provide cohesive strength to the final product.

3. Hair Care Products: PVP/VA copolymer is widely used in hair care products, including hair sprays, gels, mousses, and styling products. It provides hold,flexibility, and humidity resistance to hairstyles. It can also enhance the overall manageability and appearance of the hair.

4. Pharmaceutical Applications: PVP/VA copolymer is utilized in pharmaceutical formulations as a binder, film former, and stabilizer. It helps in tablet formulation by improving tablet integrity, disintegration, and controlled release properties. It can also be used in oral suspensions and topical formulations.

5. Cosmetics and Personal Care Products: PVP/VA copolymer is found in various cosmetics and personal care products. It is used in makeup products, such as foundations and mascaras, to improve adhesion, wearability, and water resistance. It is also used in creams, lotions, and sunscreens to enhance texture,stability, and film-forming properties.

6. Industrial Applications: PVP/VA copolymer has industrial applications as well. It is used in adhesives, coatings, inks, and paints to provide adhesion, film formation, and flexibility.

The specific properties and applications of PVP/VA copolymer may vary depending on the ratio of PVP to vinyl acetate, molecular weight, and other formulation factors. The copolymer can be customized for different requirements and performance characteristics in various industries.

PVP/VA copolymers are thermoplastic resins with molecular weights ranging from 20M to 50M. Glass conversion temperature from 55°C to 109°C, with the increase of VP content, suction water performance increases. Pharmaceutical grade PVP-VA64 copolymer is a kind of high performance film forming adhesive.

High solubility in water and a variety of organic solvents, high adhesion,At the same time has the ability of complexation. Although its unique properties can be used in the formulation of pharmaceutical preparations and afterbirth materials, it is currently mainly used as a tablet binder.

In general, the weight average molecular weight of the copolymer of n-vinylpyrrolidone and vinyl acetate is between 45,000 and 70,000 (K value is about 28 to 36). On account of vinyl acetate is easy to self-polymerize in water-based system, in order to make the product colorless and transparent and improve the degree of polymerization to obtain high molecular weight copolymerization products, it is necessary to control the reaction temperature,The concentration of initiator and chain transfer simultaneously inhibited the autoaggregation of vinyl acetate.