申请人:Bayer Corporation
公开号:US06077901A1
公开(公告)日:2000-06-20
The present invention relates to aqueous compositions containing a mixture of a) 50 to 95% by weight, based on the resin solids content of components a) and b), of an aqueous polyurethane/urea dispersion containing 0.5 to 6% by weight, based on the weight of the polyurethane/ureas, of alkoxysilane groups (calculated as Si, MW 28) and b) 5 to 50% by weight, based on the resin solids content of components a) and b), of a water reducible oligomer which is substantially free from isocyanate groups and has an alkoxysilane group content (calculated as Si, MW 28) of 1 to 6% by weight, based on the weight of the oligomer, and wherein the alkoxysilane groups are incorporated as the reaction product of I) a polyisocyanate component having a minimum average functionality of 2.4 and containing at least 50% by weight of polyisocyanate adducts and II) a compound containing amino and alkoxysilane groups. The present invention also relates to coatings, sealants and adhesives prepared from these aqueous compositions.
本发明涉及一种水性组合物,该组合物包含以下成分:a)50至95重量%,基于成分a)和b)的树脂固体含量,含有0.5至6重量%的烷氧基硅烷基团(按Si计算,分子量28),基于聚氨酯/脲的重量;b)5至50重量%,基于成分a)和b)的树脂固体含量,含有一种水可减性寡聚物,该寡聚物基本上不含异氰酸酯基团,并且其具有烷氧基硅烷基团含量(按Si计算,分子量28)为1至6重量%,基于寡聚物的重量,其中所述烷氧基硅烷基团是由以下反应生成的:I)具有平均最小官能度为2.4的聚异氰酸酯组分,其含有至少50重量%的聚异氰酸酯加成物;II)含有氨基和烷氧基硅烷基团的化合物。本发明还涉及从这些水性组合物制备的涂料、密封剂和粘合剂。