AMBIENT TEMPERATURE CURABLE NON-ISOCYANATE POLYHYDROXYALKYLURETHANE MOIETIES WITH ALDEHYDE CROSS LINKER

摘要

Ambient cured hydroxyl non-isocyanate polyurethane (HNIPU) based coating or curable formulations thereof is provided comprising: (i) a binder base comprising ambient temperature curable hydroxyl urethane oligomer and/or polymer (HNIPU) binder of selective amine hydrogen equivalent weight in the range of 400–1600 and having n≥2, 'n' being the number of hydroxyurethane repeat units in said oligomer and/or polymer, (ii) hardener comprising "m" number of aldehyde and/ or ketone functionalities, "m" being ≥1, adapted for said ambient cured hydroxyl non-isocyanate polyurethane (HNIPU) based coating having a reaction product of said (i) and (ii) such that "m+n"≥4 in said reaction product. A process for preparation of said coating or curable formulations thereof is also provided involving aldehyde and/ or ketone functionality based hardening/ cross linking at room temperature for ambient curing and film forming.