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Vinylpyrrolidone/ vinylacetate (PVP/VA) copolymers powder

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Product  Information

Chemical Name Vinylpyrrolidone/ vinylacetate copolymers

CAS # 25086-89-9

Formula (C6H9NO)n(C4H6O2)m

Synonym PVP-VA

Chemical structurer


White or creamy white, free-flowing power with characteristic smell, hygroscopic.

Soluble in water, alcohol, and other organic solvents, has good cohesiveness, hygroscopic, film forming and surface activity character.

The clarity of the aqueous product depends on the proportion of vinylpyrrolidone and vinyl acetate.

The aqueous solution of VA37 is cloudy, and the others are clear at room temperature.

The solution is slight acidic but not electrolytic.

Items            Pharmaceuticals/Cosmetic Grade

Description         White or yellow-white powder or flakes, Hygroscopic

Loss on drying (%)       ≤ 5.0

Residue on ignition (%)    ≤ 0.1

Heavy metals, (ppm)    ≤ 20

Aldehyde ( ppm)       ≤ 500

Hydrazine (ppm )      ≤ 1

Peroxides (ppm )     ≤ 400

K Value               25.2 – 30.8

NVP(ppm )           ≤ 10

Monomers(% )       ≤ 0.1

Nitrogen Content(%)   7.0-8.0



It is mainly used as water soluble and drying adhesive agent when making grain and pressing tablet directly.

It will be used in film coating and cover-taste agent.

It can prevent sugar coating from split and make bottom coating avoid dampness.


PVP/VA Series play a good role in film-former and hair-fixing agent.

Its hygroscopicity decreases with the increase of the proportion of vinylacetate in the molecular.

This property of PVP/VA is extremely useful as it works in hair sprays and hair-set lotion.

If it is mixed with PVP K-30, the effect of hair-fixing would be changed a lot.

Other industrial fields:

PVP/VA series can be used in remoisten able adhesive and other adhesives for paper or viscosity-enhancing agent and protecting colloid for printing ink.

PVP/VA 64 series can also act as emulsifying agent, protecting colloid for planting-protecting chemicals, Other dispersing systems and binder in coating.

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North seven road, Jinzhai modern industrial park, Anhui

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