White to yellowish powder or translucent granule.
Medium soluble in ethanol, slightly soluble in acetone, almost insoluble in acetone. The
solubility of PVA XX-88 model is relatively good in hot water and cold water.
Product Feature:
This product is prepared by alcoholysis of polyvinyl acetate in
methanol solution by adding
alkali solution. The molecular formula is expressed by (CH2CHOH) n (CH2CHOCOCH3) m, where ‘m
+ n’ represents the average degree of polymerization, and m/n should be 0~0.35. The average
molecular weight shall be 20000 ~ 150000.
There are many types of polyvinyl alcohol according to the degree of polymerization and
alcoholysis. The common naming standard for product models is “polyvinyl alcohol xy-mn”,
where xy represents the average degree of polymerization and mn represents the degree of
alcoholysis. Our company mainly produces models with alcoholysis degree of 88%, including
03-88, 05-88, 17-88，24-88 and 20-88 models, and other models can be customized if necessary.
Application:
This product has good film-forming characteristics, and can be used as a film-forming
material in film agents and film coating agents, and can also be used as a film-forming
material in thin film; This product also has a good suspending effect. It can also be used
as emulsifiers and emulsification stabilizers in o/w emulsions. It can also be used as
thickening agents, lubricants and protective agents in some eye drops.This product also has
gel-forming properties and is used in some gel dosage forms such as gel patches. It can be
used as an adhesive for ordinary tablets, granules, etc.
Application Examples
As a film-forming material in coating agent/ spray agent/ film-coated agents As thickening
agents, lubricants and suspending agents in eye drops
As binder in tablets and granules
Used in gel dosage forms due to gel-forming properties
As emulsifiers/emulsification stabilizers in o/w emulsions due to its good suspending effect
As a coating material for food additives
Incompatibility:
Polyvinyl alcohol has various reactions of secondary hydroxyl
compounds, such as
esterification reaction. It will drop in strong acids, soften or dissolve in weak acids and
alkalis. High concentrations of PVA is incompatibility with inorganic salts, especially
sulphate and phosphate. Phosphate can precipitate 5% (W/V) of polyvinyl alcohol. Borax can
make PVA forms a gel.
Safety:
This product is generally a non-toxic material. When the concentration is as high as 10%, it
has no irritation to skin and eyes. Cosmetics can use polyvinyl alcohol with a concentration
of up to 7%. Rat experiments show that subcutaneous injection of 5% (W/V) polyvinyl alcohol
can cause anemia.
Storage:
Stored in a cool, dry and sealed container.
