Wacker VINNOL H15/45M VC/VAc Resin — Carboxyl-Containing Suspension-Process Terpolymer for Heat-Seal Coatings, Metal Anti-Corrosion and Inks

Full name and product positioning Product full name: Wacker VINNOL® H15/45M carboxyl-containing vinyl chloride-vinyl acetate terpolymer resin This grade is a carboxyl-containing vinyl chloride-vinyl acetate-dicarboxylic acid terpolymer resin produced by Wacker using suspension polymerization, with a K value of 47–49, making it a medium-high molecular weight grade. Its carboxyl content gives excellent adhesion to metal substrates, while the suspension process provides good water resistance and chemical resistance. It is a widely used grade in heat-seal coatings and metal anti-corrosion coatings. Core technical parameters Parameter Typical value / range Appearance White powder Vinyl chloride (VC) content Approx. 84 wt% Vinyl acetate (VAc) content Approx. 15 wt% Dicarboxylic acid content Approx. 1 wt% Acid value 5.5–7.5 mg KOH/g K value 47–49 Dynamic viscosity (20% MEK solution, 20 °C) 50–70 mPa·s Chlorine content 47.1–48.3 wt% Volatile content <1.0 wt% Flow time (20% MEK solution) Approx. 50 s Density 1.36 g/cm³ (23 °C) Bulk density Approx. 750 kg/m³ Glass transition temperature (Tg) Approx. 74 °C Weight-average molecular weight (Mw) 60,000–80,000 g/mol Particle size <1 mm Solubility Good solubility in ketone solvents; low-viscosity formulations can reduce solvent consumption Packaging 25 kg coated three-layer paper bag  Food-contact compliance Complies with FDA 175.300 Core advantages ·   Suspension process gives good water resistance and chemical resistance; coatings are not easily attacked by water, dilute acids and alkalis or salt water ·   Carboxyl functional groups give excellent adhesion to metal substrates; can be used directly in metal primers and heat-seal coatings ·   Moderate-to-low viscosity can reduce solvent consumption at the same solids content, helping to lower formulation solvent costs ·   Can be crosslinked with isocyanates, polyaziridines or polycarbodiimides, helping improve coating heat resistance and chemical resistance ·   Broad suitability for heat-sealing; good sealing performance with polar substrates such as aluminum foil, PVC and PET Main application areas ·   Core applications: heat-seal coatings (aluminum foil / PVC / PET), metal anti-corrosion primers, can coatings, coil coatings ·   Suitable areas: automotive coatings, marine and protective coatings, gravure / screen inks, industrial adhesives, film lamination ·   Not recommended: pure metal bonding systems without carboxyl modification (insufficient adhesion); long-term outdoor exposure formulations without UV stabilizers; non-heat-seal coatings on high-VAc flexible films