VA64, with CAS 25086-89-9 and molecular formula: (C6H9NO)n(C4H6NO2)m, is a white or off-white powder.
VP/VA copolymer products are copolymerized with different proportions of NVP and vinyl acetate, and exist in powder form. They are odorless and tasteless, do not absorb moisture, are soluble in water, ethanol and anhydrous alcohols, and have good adhesion, hygroscopicity, film-forming properties and surface activity.
Copovidone (PVP VA64) is a linear copolymer structure of N-vinylpyrrolidone (NVP) and vinyl acetate (VA), so it has the properties of polyvinylpyrrolidone (PVP) and polyvinyl acetate (PVAC). It retains the good water solubility, adhesion and film-forming properties of PVP, and has broader solubility, better plasticity and stronger surface activity than PVP. The pyrrolidone structure in copovidone allows it to have good solubility in many solvents such as water, ethanol and methylene chloride, and the vinyl acetate group lowers its glass transition temperature.
VA64 has the following characteristics:
It is a 6:4 copolymer of N-vinylpyrrolidone and vinyl acetate, and has good plasticity and compressibility;
It is less hygroscopic than Povidone K30 and has a lower glass transition temperature, with Tg around 110-113C;
Low viscosity makes glassy drugs and polymers easy to extrude.
VA64 has wide application in several fields. Among them, one of the most prominent application area is cosmetics. Copovidone VA64 is mainly used as film forming agent and setting agent in cosmetics. Specifically, it has several main uses:
Film formers and hair styling agents: Copovidone VA64 is used in a variety of hair care products such as mousse, spray, hair conditioner and shampoo series of products, can help form a protective film, increase the shine of hair, improve the durability of styling. It is better when mixed with PVP K30.
Emollients and moisturizers: Copovidone in skin creams helps retain moisture in the skin and provides a sense of moisturization, so VA64 has a similar moisturizing and moisturizing effect.
Pigment dispersants: In cosmetics such as hair dye, eyeliner and lipstick, copovidone helps to evenly disperse pigments and improve the product’s performance color saturation and uniformity. While this is not directly specific to VA64, given the versatility of copovidone, VA64 may also have this capability.
To sum up, copovidone VA64 has a wide range of applications in the cosmetics industry, especially as a film forming agent and styling agent, providing important functions for hair care products.
