Potassium Titanyl Oxalate PTK (Titanium Crosslinking Catalyst)

Titanium (Ti4+) acts as a Lewis acid crosslinker for several functional groups: (1) Hydroxyl groups in polyols and cellulose—most common application; (2) Carboxylic acid groups in polyacrylates and alkyds—forming titanate ester linkages; (3) Carbonyl groups in waterborne acrylic dispersions; (4) Amine groups at alkaline pH. PTK is particularly useful for waterborne acrylic floor coatings where it creates a crosslinked film without requiring a separate hardener component, enabling one-pack systems with improved chemical resistance compared to non-crosslinked acrylics.