Vinylpyrrolidone Vinyl Acetate Copolymers

Poly 1 vinylpyrrolidone co vinyl acetate 64 or pvp va64 contains 1 vinylpyrrolidone and vinyl acetate in the ratio of 6 4.

Vinylpyrrolidone vinyl acetate copolymers.

Sigma aldrich online catalog product list. Therefore combining vinylpyrrolidone with water insoluble vinyl acetate results in a copolymer that is still appreciably soluble in a variety of solvents but slightly more hydrophobic. Poly 1 vinylpyrrolidone co vinyl acetate average mw 50 000 gpc vs. Copovidone vinylpyrrolidone vinyl acetate copolymer a more plastic and less hygroscopic copolymer is also having a high binding capacity and hence used as a dry binder in direct compression technique.

Copovidone is also used as a solubilizing agent granulating agent retardant and film former. Cite this chapter as. Polymers in the four ranges of vinylpyrrolidone content 30 50 60 and 70 percent are produced in ethanol or isopropanol. Acetic acid vinyl ester polymer with 1 vinyl 2 pyrrolidinone.

Pvp va copolymers are available as white powders or clear solutions in ethanol isopropanol and water. Linear random copolymers of vinyl pyrrolidone vp and vinyl acetate va family includes both hydrophobic and hydrophilic thermoplastic oxygen permeable polymers solubility varies with the proportion of vinyl acetate insoluble in ethers and aliphatic hydrocarbons soluble in water if vp content is greater than 50. Polyvinylpyrrolidone vinyl acetate pvp va resins are linear random copolymers produced by the free radical polymerization of the monomers in ratios varying from 70 30 to 30 70 vinyl acetate to vinylpyrrolidone. Poly vinylpyrrolidone pvp and copolymers.

Polyvinylpyrrolidone excipients for pharmaceuticals. Water soluble copolymers with vinylpyrrolidone are used as color transfer inhibitors in detergent preparations with vinyl acetate as a coating of lithographic printing plates with acrylic acid esters or methacrylic acid esters or 2 hydroxyethyl methacrylate as adhesion promoters in paints or with acrylonitrile as precursors for carbon fibers.