Silane endcapped moisture solidifiable compsns

通过使(A)具有至少两个异氰酸酯基的化合物与(B)式(2)的硅烷反应，可以制备具有许多式(1)的端部或侧挂甲硅烷基的湿气可固化的聚合物：∴∴其中R#+[1]表示具有1-10个碳原子、任选插入一个或多个醚氧原子的烷基；R#+[2]表示C#-[1]-C#-[6]烷氧基或C#-[6]-C#-[8]芳氧基；R#+[3]表示烷基，或者芳基；T表示4-10个碳原子的支化或环状亚烷基，它可以任选插入一个或多个醚氧原子；和a是0、1或2。用该聚合物配制的湿气固化密封剂配制剂显示了改进的热稳定性、伸长率和抗撕裂性。 Moisture curable polymers having terminal or pendant silyl groups of the formula:where R1 represents an alkyl group having 1 to 10 carbon atoms, optionally interupted with one or more ether oxygen atoms, or a group of the formulaR2 represents a C1 to C6 alkoxy group or a C6-C8 aryloxy group;R3 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;X is an alkylene group of 3-10 carbon atoms, which may be linear, branched or cyclic;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 (3):Moisture cured sealant formulations formulated with the polymers exhibit improved thermal stability, elongation, and tear resistance.