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6<br />
<strong>Vinyl</strong> Chloride/<strong>Vinyl</strong> Acetate Copolymers<br />
VYNS-3<br />
The highest molecular weight solution vinyl resin, having<br />
a composition of approximately 90 percent vinyl chloride<br />
and 10 percent vinyl acetate. UCAR® Solution <strong>Vinyl</strong> Resin<br />
VYNS-3 is usually dissolved in relatively strong ketone<br />
systems to provide resin solutions of 13 to 17 percent<br />
solids. VYNS-3 is used where the ultimate toughness,<br />
durability, and chemical resistance are required. Because<br />
of its excellent tensile tear properties, VYNS-3 is ideally<br />
suited for strippable coatings applications. VYHH is often<br />
blended with VYNS-3 to increase sprayable solids.<br />
VYHH<br />
A high molecular weight resin having a composition of<br />
approximately 86 percent vinyl chloride and 14 percent<br />
vinyl acetate. VYHH offers a desirable balance of chemical<br />
resistance, solubility, film strength, and thermoplasticity.<br />
VYHH is usually dissolved in a relatively strong<br />
solvent/diluent combination, such as ketone solvent/<br />
aromatic diluent (50/50 percent by weight). With this<br />
system, a solids content of 20 to 22 percent can be<br />
achieved. Marine and maintenance coatings, ink and<br />
overlacquers for vinyl substrates, strippable coatings,<br />
and masonry and metal coatings are among the principal<br />
applications for UCAR Solution <strong>Vinyl</strong> Resin VYHH.<br />
VYHD<br />
A medium molecular weight resin having a composition<br />
of approximately 86 percent vinyl chloride and 14 percent<br />
vinyl acetate. UCAR Solution <strong>Vinyl</strong> Resin VYHD is more<br />
soluble in ketones and other solvents than VYHH and,<br />
therefore, has a greater tolerance for aromatic hydrocarbon<br />
diluents. Resin solutions of 25 percent solids can be<br />
achieved by dissolving VYHD in a system consisting<br />
of ketone solvent/aromatic diluent (35/65 percent by<br />
weight). VYHD can be substituted for VYHH in most<br />
applications where higher solids are needed.
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