PVA 1788/1799/2488

English name of PVA 2: Polyvinyl alcohol, viny) alcohol polymer, Poval
Short: PVA
Formula: [C2H4O] n
Solution to sex: not soluble in petroleum ether, soluble in water.
Performance: polyvinyl alcohol resin product is white solid, form sub-flocculent, granular, powder three; non-toxic, tasteless, non-polluting, can be dissolved in water at ****0 °C.The solution has good adhesion and film; ability oils, lubricants and hydrocarbons such as most organic solvents; with a long chain polyol ester, ether, acetal and other chemical properties.
Usage: mainly used in textile industry, warp, fabric finishing agents, vinylon fiber material; construction and decoration industry, **7 glue, interior and exterior paints, adhesives; the chemical industry as a polymeric emulsifier, dispersant and polyvinylformaldehyde, acetal, butyral resin; paper industry as paper adhesives; agriculture for soil amendments, pesticides, synergists, and polyvinyl alcohol film adhesion; can be used for cosmetics and high-frequencyquenching agent aspects.
Storage: Store in ventilated, cool dry place, away from fire.Transport should be gently, to prevent damage to the packaging.
PVA ***9
Executive Standard: GB ********7
Routing high-alkaline alcoholysis
         Product rating
Indicators
Excellent grade level qualified project
Volatile (%) ≤ 8.0 ≤ 8.0 ≤ 8.0
NaOH (%) ≤ 0.2 ≤ 0.3 ≤ 0.3
Residual acetate (%) ≤ 0.*5 ≤ 0.2 ≤ 0.2
NaAC (%) ≤ 6.8 ≤ 7.0 ≤ 7.0
Purity (%) ≥ *5.0 ≥ *5.0 ≥ *4.7
Transparency (%) ≥ *0.0 ≥ *0.0 ≥ *0.0 ≥
Coloring degree (%) ≥ *8.0 ≥ *6.0 ≥ *4.0
Swelling ratio (%) **0 ± *5 **0 ± *5 **0 ± *5
Average degree of polymerization (%) ***0 ± *0 ***0 ± *0 ***0 ± *0

PVA ***9 (H) ***9 (L) ***9 (L) quality indicators
 Index name
Alcoholysis degree% (mol / mol) of sodium acetate viscosity mPa.s volatile% ≤% ≤ PH value of the degree of purity,% ≥
****9 (H) grade product *9.****0 *5.***5.0 5.***0.0 *5.0 6.7 7.0
Qualified *9.****0 *4.7 *4.***5.0 7.0 8.0 5.***0.0
****9 (L) superior grade 2.0 5.0 5.**7.0 *2.0 *5.***5.0 *8.****0
Qualified *8.****0 *0.0 *4.***5.0 2.4 6.0 5.**7.5
****9 (L) superior grade 2.0 5.0 5.**7.0 *2.0 *5.***5.0 *8.****0
Qualified *8.****0 *0.0 *3.***5.0 2.4 6.0 5.**7.5