One-component moisture-curing SPU sealant: The secret of shortening the surface drying time to 14 minutes
One-component moisture-curing SPU sealant: The secret of shortening the surface drying time to 14 minutes
Keywords: silane-terminated polyurethane, catalyst optimization, KH-792 accelerator
Guangzhou Institute of Mechanical Science optimizes the SPU sealant formula to achieve a breakthrough in construction efficiency:
Catalyst selection: When the amount of dibutyltin dilaurate is 0.3 parts, the surface drying time is shortened from 45min to 14min;
Adhesion accelerator: KH-792 dosage > 1 part can form an amino-tin composite catalytic system, and the cross-linking density is improved;
Storage stability: Adding water absorbent A-171 and wollastonite, the performance does not decay after 7 days of storage at 80℃