Wacker VINNOL E15/45 VC/VAc Resin — Emulsion-Polymerized VC/VAc Copolymer for Pigment Dispersion, Gravure / Screen Printing and Plastic Coatings

Full name and product positioning Product full name: Wacker VINNOL® E 15/45 vinyl chloride-vinyl acetate copolymer resin (emulsion polymerization type, commonly known as VC/VAc resin) VINNOL® E 15/45 is a vinyl chloride-vinyl acetate binary copolymer produced by Wacker (Germany) using emulsion polymerization. It contains approx. 85 wt% vinyl chloride and approx. 15 wt% vinyl acetate with a K value of approx. 45. Compared with the suspension-polymerized H series, E15/45 provides higher surface energy and a lower water contact angle on many substrate surfaces, together with good pigment wetting. It is used mainly for pigment preparation, solvent-based printing inks and coatings. Core technical parameters Parameter Typical value / range Appearance White granules with a small amount of powder Vinyl chloride (VC) content Approx. 85 wt% Vinyl acetate (VAc) content Approx. 15 wt% Chlorine content 47.1 – 48.3 wt% K value 44 – 46 Solution viscosity (20% MEK solution, 20 °C) 32 – 42 mPa·s Flow time (20% MEK solution) Approx. 36 s Volatile content < 0.5 wt% Glass transition temperature Tg Approx. 75 °C Weight-average molecular weight Mw 45,000 – 55,000 g/mol Density 1.37 g/cm³ Bulk density Approx. 550 kg/m³ Particle size < 2.5 mm Solubility Ketones and esters are common solvents; aromatic hydrocarbons can be used in limited blends with true solvents; insoluble in alcohols and aliphatic hydrocarbons Process characteristics Emulsion polymerization; higher surface energy and lower water contact angle; good pigment wetting and dispersion Packaging 25 kg/bag Core advantages ·   Emulsion polymerization route gives higher film surface energy and a lower water contact angle, with good adhesion to many polar plastic substrates ·   Good pigment wetting and dispersion, suitable as a binder for pigment preparations (color chips and pastes) and high-pigment-content inks ·   Medium K value and solution viscosity provide a good balance of dissolution and leveling, covering gravure, screen and pad printing processes ·   Films have good toughness, abrasion resistance, water resistance and chemical resistance ·   Supplied in granular form, generating relatively little dust during feeding and dispersion, which facilitates automated feeding and cleaner production Main application areas ·   Core applications: pigment preparation and color chips, solvent-based gravure printing inks, screen-printing inks, pad-printing inks, inkjet inks, plastic coatings, industrial wood coatings, marine and protective coatings, strippable coatings ·   Suitable areas: surface printing and coating of polar plastic films and injection-molded parts such as PET / PVC / PMMA / ABS / PC, metal primers, film lamination, high-pigment paste dispersion ·   Not recommended: direct blending with alkyd resins, nitrocellulose, polyvinyl acetate or polyvinyl butyral (generally incompatible); avoid pigments containing zinc, cadmium and iron oxides; avoid direct contact with iron containers to prevent discoloration; long-term outdoor use requires blending with weathering stabilizers