Origin |
China |
Synonyms: Polyvinyl alcohol; PVA; Polyvinol; ethenol homopolymer
General descriptions:
CAS No.: 9002-89-5 Molecular Weight: Not applicable to mixtures. Chemical Formula: [ -CH2CHOH- ]n Product Codes: U227, U228, U229, U232
Appearance: White free-flowing granules. Odor: Mild odor. Solubility: Moderately soluble. Specific Gravity: 1.19 - 1.31 g/cm3 pH: Aqueous solution is neutral or slightly acid. % Volatiles by volume @ 21C (70F): 0
Melting Point: 230 C (ca. 392F)
Boiling point: 228 C
Flash point: 79.44 C
H.S : 39053000 Applications:
PVA is used in sizing agents that give greater strength to textile yarns and make paper more resistant to oils and greases. It is also employed as a component of adhesives and emulsifiers, as a water-soluble protective film, and as a starting material for the preparation of other resins. By reaction with butyraldehyde (CH3CH2CH2CHO) and formaldehyde (CH2O), PVA can be made into the resins polyvinyl butyral (PVB) and polyvinyl formal (PVF). PVB, a tough, clear, adhesive, and water-resistant plastic film, is widely used in laminated safety glass, primarily for automobiles. PVF is used in wire insulation.
Specifications:
Item 24-88P 17-88P
The average degree of polymerization(DP) 2400-2500 1700-1800
Molecular Weight(Mn) 118000-124000 84000-89000
Viscosity(cps) 44-50 21-26
Basicity(mol%) 86-89 86-89
Volatile(wt%) 5max 5max
Ash(wt%) 0.5max 0.5max
PH 5-7 5-7
Fineness(mesh) 120min 120min
We also can supply other specifications according to your requests.
Packaging: 25kgs net in PP woven bag coated with plastic.And we also can provide other packagings.
Storage:
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