Isocyanic Acid Derivatives Purification/Separation TRIZ Cases
- Xylylene Diisocyanate Composition for Optical Lens Acidity Control
Controlling XDI acidity and chlorine content stabilizes polymerization with polythiols, preventing turbidity and stria in optical lenses.
- Isocyanate Distillation Vacuum Control to Prevent Compressor Cavitation
Selected operating liquids and low-temperature liquid ring compression suppress cavitation at 10-200 mbar during isocyanate distillation.
- Isocyanate Composition for Stable, Non-Discoloring Spectacle Lenses
A phenolic Formula (1) compound stabilizes reactive lens isocyanates, limiting storage discoloration without toxic stabilizers.