| 摘要 |
<p>In one aspect, this invention was a polyurethane sealant composition comprising (1) a urethane prepolymer having an isocyanate fuNctionality of at least 2.0 and a weight average molecular weight of at least 2,000; (2) a catalytic amount of a tin compound which catalyzes the reaction of isocyanate moieties with water or an active hydrogen containing compound; and (3) a stabilizing amount of an organophosphite which has an alkaryl ligand or both an aliphatic ligand and an aromatic ligand. The prepolymer may further comprise silane functionality or the composition may further comprise a compound or polymer which contains silane moieties and was compatible with the polyurethane prepolymer. The invention was also a method for bonding glass to a substrate which comprises contacting a sealant according to the invention with glass and another substrate with the sealant disposed between the glass and substrate and thereafter allowing the sealant to cure so as to bond the glass to the substrate.</p> |
