Product Information
Chemical Name Vinylpyrrolidone/ vinylacetate copolymers
CAS # 25086-89-9
Formula (C6H9NO)n(C4H6O2)m
Synonym PVP-VA
Chemical structurer
Descriptions
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
Applications
Pharmaceuticals:
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.
Cosmetics:
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.
-
PVP/VA 64 powder
Chemical Name Vinylpyrrolidone/ vinylacetate copolymers
CAS # 25086-89-9
Formula (C6H9NO)n(C4H6O2)m
Synonym PVP-VA
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