ESTER CARBONATE POLYOLS FOR HYDROLITICALLY STABLE ADHESIVES

摘要

A two component curable ahesive or sealant composition is provided. The first component may comprise a mixture of at least one polyol selected from the group comprising a polyester polyol a polyester polycarbonate copolymer polyol and combinations thereof a resin and optionally a solvent. The second component may comprise a prepolymer obtained by reacting a polyester polycarbonate copolymer polyol which is the reaction product of a polyester polyol which is the reaction product of one or more organic acids and one or more glycols having a functionality of two or more and one or more polycarbonate polyols at least one organic polyisocyanate component and at least one chain extending agent and optionally a solvent. Alternatively the first component may comprise a polyester polycarbonate copolymer polyol a resin and optionally a solvent. The second component may comprise a polyisocyanate curative and optionally a solvent. The cured adhesive exhibits improved hydrolytic properties while maintaining excellent processability and adhesive properties.