A PROCESS FOR THE PREPARATION OF AN IMPROVED POLYURETHANE BASED SEALANT

摘要

This invention relates to a process for preparation of polyurethane based sealant composition. According to the process synthesis of pre-polymer by treating hydroxylterminated polybutadiene (HTPB) with toluene di-isocyanate. Synthesis of polyester polyol by reaction of trimethylol with propylene in the presence of a catalyst. Hardener is prepared by mixing amines and polyol and charging the mixture with a filler. Sealant composition and its curing is prepared.