Specification :

Characteristice: A low molecular weight resin containing approximately 81 percent vinyl chloride, 17 percent vinyl acetate, and 2 percent maleic acid. Because of the carboxyl functional group, VMA has excellent adhesion on metal, especially on aluminum foil, the resin foil also has a good adhesion on PVC , ABS, paper, textiles, beton, etc. At the same time, VMA offers a desirable balance of chemical resistance, solubility, diaphaneity, film strength, and thermoplasticity. It has excellent interbedded adhesion.

Solubility: VMA is characterized by a high degree of solubility in solvent systems having a high aromatic hydrocarbon content. When dissolved in a suitable solvent/ diluent combination, such as 25 percent ketone/ 75 percent aromatic hydrocarbon, resin solutions of 30 percent solids can be achieved. Ketones is a particularly good solvent, and esters is the relatively weak solvent. Chlorinated hydrocarbons such as dichloroethane and 1, 2 - dichloroethane can completely dissolve VMA, and methyl chloroform and tetrachloroethane can only swell it. Aromatic hydrocarbons have a good role in the swelling, generally using with ketone.

Application: VMA yields the good balance of solubility and viscosity properties needed for high-build, air-dry maintenance finishes, and is often used to make coatings and adhesives applications where higher solids are desirable. VMA can be used in air-dry finishes, such as maintenance, marine, and metal coatings, interbedded adhesive, aluminum foli varnish, UV surface treatment, UV primer, thermal transfer adhesive, shoe adhesive, ink-jet and metal inks, etc.

VMA Vinyl Resin Quality standard ( XHQB-8)
No. Item Index Test method
1 Appearance White powder By visual
2 Whiteness e80 GB2913-82
3 Composition % by Wt Vinyl Chloride 81± 1% GB/ T7139-2002
Vinyl Acetate 17± 1% ISO1159-1978
Maleic Acid 2± 0.2%
4 Reactive Functionality ( Carboxyl % ) 2± 0.2%
5 K Value 32-34 GB/ T3401-1999
6 Viscosity No. ml/ g 40-44 GB/ T3401-1999
7 Glass Transition Temp  About 70 GB11998-89
8 Average Molecular Wt About 15000 Calculated by the Viscosity No.
9 % by wt, through 60 mesh 100% GB/ T6003.1
10 Apparent density ( g/ ml) e0.5 GB20022-2005
11 Volatilization ( % ) d1% GB/ T2914-1999
12 Impurity Particle No. / 100g d20 GB9348-88
13 25% resin in MEK/ Toluene( 50/ 50) Colorless and Transparent By visual