Specification :

Characteristice: A high molecular weight, partially hydrolyzed vinyl chloride/ vinyl acetate resin, made in a two-step process, having a composition of approximately 90 percent vinyl chloride, 4 percent vinyl acetate, 6 percent vinyl alcohol, with a hydroxyl content of approximately 2.3 percent. VAH has excellent adhesion on PET, resin primer, paper, PVC, ABS, pre-treatment of PE and OPP. VAH 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 VAH often used with other film-forming material in order to improve the coating performance, and enhance paint adhesion, flexibility, tenacity, hardness and chemical resistance. The hydroxyl functional group permits crosslinking reactions for thermoset , obtaining excellent chemical and water resistance.

Solubility: VAH can be dissolved in relatively strong solvent/ diluent combinations, such as 50 percent ketone/ 50 percent aromatic hydrocarbon, to produce resin solutions of 22-25 percent solids. Ketone is a particularly good solvent, and esters is the relatively weak solvent. Chlorinated hydrocarbons such as dichloroethane and 1, 2 - dichloroethane can completely dissolve VAH, and methyl chloroform and tetrachloroethane can only swell it. Aromatic hydrocarbons have a good role in the swelling, generally using with ketone.

Application: VAH can be used for a wide range of coatings applications, including marine anti-corrosion paint, gravenu ink, chassis paints, maintenance, PU and wood finishes, paper coatings, PET inks, interbedded adhesive, adhesive for magnetic tape and carbon ribbon.

VAH Vinyl Resin Quality standard ( XHQB-10)
No. Item Index Test method
1 Appearance White powder By visual
2 Whiteness e80 GB2913-82
3 Composition % by Wt Vinyl Chloride 90± 1% GB/ T7139-2002
Vinyl Acetate 4± 1% ISO1159-1978
Vinyl Alcohol 6± 0.5%
4 Reactive Functionality ( Hydroxyl % ) 1.8-2.3%
5 Hydroxyl Value 70-76 ISO2554-1974
6 K Value 46-48 GB/ T3401-1999
7 Viscosity No. ml/ g 54-58 GB/ T3401-1999
8 Glass transition Temp  About 79 GB11998-89
9 Average Molecular Wt About 27000 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