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