Crosslinked polyethylpyrrolidone (PVPP) is a kind of crosslinked polymer which is polymerized from vinylpyrrolidone monomer under certain conditions and is insoluble in water, strong acid, strong base and common organic solvents. As an important polymer fine chemical product,PVPP has many excellent and unique properties, and has been widely used in cosmetics, food, medicine and other fields. Characteristics Crosslinked polyvinylpyrrolidone (PVPP) can be seen as a linear PVP molecular chain by physical or chemical crosslinking. Some properties of PVPP obtained by different synthesis methods are different due to different crosslinking methods and crosslinking degrees. Depending on the degree of crosslinking, PVPP appears as super absorbent resins (low crosslinking), water absorbent gels (medium crosslinking) and insoluble substances (high crosslinking). CAS number: 25249-54-1 Molecular formula: (C6H9NO)n Boiling point: 217.6°C at 760 mmHg Nature and packaging, storage Properties: white or near white, with hygroscopic easy to flow powder, odorless or slightly odorless, insoluble in…

[Chemical name]: Cross-linked polyvinyl pyrrolidone (pvpp) [alias]: insoluble POvidone, crosslinked pvp, polyethylene polypyrrolidone Molecular formula (CH,NO)n This product is a water-insoluble homopolymer synthesized from n-ethylene-2-pyrrolidone. The molecular formula is (C6H9NO)n, where n represents the average number of 1-vinyl-2-pyrrolidone chains. According to anhydrous matter, nitrogen (N) should be 11.0%~12.8%. Source and preparation N-vinyl-2-pyrrolidone is polymerized and crosslinked in the presence of basic catalyst or N1-divinylimidazole to produce a crude homopolymer. Then water, 5% acetic acid and 5% ethanol are returned to the extract <=50mg/kg to obtain a pure crosslinked homopolymer. The whole synthesis time is about 3 hours. character This product is white or near white, with hygroscopic easy to flow powder, odorless or slightly odorless, insoluble in water, alkali, acid and common organic solvents, so the molecular weight range can not be measured. This product has a high capillary/water capacity, large specific surface area, strong hydration ability(HK=5.6), high and rapid…