Description
Polyvinyl Alcohol
Other Names: PVA, PVOH
MF: (C2H4O)n
CAS No.: ********5
Appearance:White powder or flakes
Packing:
*2.5kgs/bag, *5kgs/bag or according to customers' need, *3mts in
*0'FCL
Product Performance:
PVA resin is a kind of high polymer. It is white or light yellow
floc, Granular or powdery in appearance. Its molecular formula
is[CH2CHOH]n, and the molecular formula for some of the PVA is
-[CH2CHOH]n-[CH2CHOOCCH3]m-. PVA is non-toxic, insipid and
harmless.
PVA is water-soluble and the solvent provide good viscosity and
film building. It can withstand oils, lubricants, hydrocarbons and
most other organic solvents. PVA has better chemical stability and
insulatibility, and provide ease in firm building; It possess the
typical chemical properties of polyols and can carry out process of
esterification, etherealization, aceatalization etc.
Glue.
Application:
A. Textile industry: PVOH is mainly used as a warp dressing agent,
textile finishing agent and the raw material of vinylon;
B. Construction: Upholstery industry **7 glue, it's used as an
additive of cement and mortar, inner and outer wall paints, and
moulding board binder
C. Chemical industry: It's used as a polymer emulsifying agent,
dispersing agent and used to produce PVOH formal, PVOH acetal and
PVOH butyral.
D. Paper industry: It's used as an adhesive in lumbering and
paper-making industries.
E. Agriculture: Used as a soil improving agent, pesticide
reinforcing agent and PVOH thin film
F. Used as a well-fixing agent in petroleum exploitation.
G. It can also be used into cosmetic, medicine, printing, ceramics,
steel-making, electronics and plating
Dissolving Temperature, Thickness and
Time:
PVA products dissolvent ability is determined by the degree of
alcoholysis and polymerization. When polymerization increased, the
ability to dissolve will reduced. Likewise, when the degree of
alcoholysis decreased, the dissolvent temperature will reduced and
water solubility will increase.
Fully alcoholysed PVA products are more sensitive to temperatures
changes. Such products cannot dissolve or experience partial swell
in properties when temperature falls below required degree.
Blending will be difficult and foam created should the temperature
exceed the required degree for partial alcoholysis products.
Temperature must be controlled at acceptable range for ease of
dissolving.
