申请人:Henkel AG & Co. KGaA
公开号:EP3067375A1
公开(公告)日:2016-09-14
A silylated polyurethane obtainable by a process comprising the following steps: (a) reacting at least one polyol with at least one triisocyanate to form a hydroxyl-terminated polyurethane prepolymer, and (b) reacting said polyurethane prepolymer with at least one isocyanatosilane of the formula (1): OCN-R-Si-(X)m(R1)3-m, wherein m is 0, 1 or 2, each R1 is independently from each other a hydroxyl group, an alkoxy group having 1 to 10 carbon atoms, an acyloxy group having 1 to 10 carbon atoms, or -OCH(R2)COOR3, wherein R2 is hydrogen or an alkyl group having 1 to 4 carbon atoms and R3 is a straight-chain or branched alkyl group having 1 to 8 carbon atoms, each X is independently from each other an optionally substituted hydrocarbon group having 1 to 10 carbon atoms, which can be interrupted by at least one heteroatom, and R is a difunctional organic group, to endcap the hydroxyl groups on said prepolymer with said isocyanatosilane. The silylated polyurethanes are suitable for use in a preparation as an adhesive, sealant, or coating agent.
一种硅烷化聚氨酯,可通过包括以下步骤的工艺获得:(a) 至少一种多元醇与至少一种三异氰酸酯反应生成羟基封端聚氨酯预聚物,以及 (b) 上述聚氨酯预聚物与至少一种式(1)的异氰酸硅烷反应:OCN-R-Si-(X)m(R1)3-m,其中 m 为 0、1 或 2,每个 R1 相互独立地为羟基、具有 1 至 10 个碳原子的烷氧基、具有 1 至 10 个碳原子的酰氧基或-OCH(R2)COOR3,其中 R2 为氢或具有 1 至 4 个碳原子的烷基,R3 为具有 1 至 8 个碳原子的直链或支链烷基、每个 X 相互独立地为具有 1 至 10 个碳原子的任选取代的烃基,该烃基可被至少一个杂原子间断,R 为双官能团有机基团,以便用所述异氰酸硅烷封端所述预聚物上的羟基。硅烷化聚氨酯适合用作粘合剂、密封剂或涂层剂。