| 摘要 |
<p>Moisture curable polymers having terminal or pendant silyl groups of formula (1) thereon, where R1 represents an alkyl group having 1 to 10 carbon atoms optionally interrupted with one or more ether oxygen atoms; R2 represents a C¿1? to C6 alkoxy group or a C6-C8 aryloxy group; R?3¿ represents an alkyl or an aryl group; T represents a branched or cyclic alkylene radical of 4 to 10 carbons, which may be optionally interrupted by one or more ether oxygen atoms; and a is 0, 1 or 2 may be prepared by reacting (A) a compound having at least two isocyanate groups thereon with (B) a silane of formula (2). Moisture cured sealant formulations formulated with the polymers exhibit improved thermal stability, elongation, and tear resistance.</p> |
