Specification :

Characteristice: A low molecular weight copolymer containing approximately 81 percent vinyl chloride, 4 percent vinyl acetate, and 15 percent hydroxyalkyl acrylate, with the hydroxyl content at 2.0 percent. VOH has excellent adhesion on paper, polysulfone resin, acrylic resin, PVC, ABS, PC and the surface of ink. VOH has good compatibility with other film-forming material, such as alkyd resins, polyurethane elastomers, isocyanate resin, melamine resin, urea formaldehyde, epoxy polymers and so on. So VOH often used with other film-forming material in order to improve the coating performance, and enhance paint adhesion, flexibility, tenacity, hardness and chemical resistance. Because of the hydroxyl functional group, VOH can also be used for improving the characteristics including alkyd, two-component polyurethane, and two-component epoxy coatings.

Solubility: Ketones is a particularly good solvent, and esters is the relatively weak solvent. Chlorinated hydrocarbons such as dichloroethane and 1, 2 - dichloroethane can be completely dissolved VOH, and methyl chloroform and tetrachloroethane can only swell it. Aromatic hydrocarbons have a good role in the swelling, generally using with ketone. VOH vinyl resin can dissolve in relatively strong solvent/ diluent combinations, such as 50 / 50 ketone/ aromatic hydrocarbon, to produce resin solutions of 25-28 percent solids. VOH resin solution viscosity and other characteristics is very similar to VAD, because of its low molecular weight, with greater solubility, it can be dissolved with a high level of resin solid content.

Application:
VOH can be used for a wide range of coatings applications for maintenance, marine and metal finishes, marine anti-corrosion paint, cans paint, wood and plastic finishes, paper and leather coatings, PET inks, adhesive for magnetic tape and carbon ribbon.

VOH Vinyl Resin Quality standard ( XHQB-14)
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 4± 1% ISO1159-1978
Hydroxyalkyl Acrylate 15± 1%
4 Reactive Functionality ( Hydroxyl % ) 1.9-2.1%
5 Hydroxyl Value 66 ISO2554-1974
6 K Value 30-32 GB/ T3401-1999
7 Viscosity No. ml/ g 32-36 GB/ T3401-1999
8 Glass Transition Temp  About 65 GB11998-89
9 Average Molecular Wt About 15000 Calculated by the Viscosity No.
10 % by wt, through 60 mesh 100% GB/ T6003.1
11 Apparent density ( g/ ml) e0.5 GB20022-2005
12 Volatilization ( % ) d1% GB/ T2914-1999
13 Impurity Particle No. / 100g d20 GB9348-88
14 25% resin in MEK/ Toluene( 50/ 50) Colorless and Transparent By visual