| 摘要 |
Organosilicon compounds containing urethane groups are prepared by reacting aminofunctional organosilicon compounds containing at least one siloxane unit AR a SiO 3 - a 2 ( I ) per molecule and at least two siloxane units of the formula XR b SiO 3 - b 2 ( II ) in which R are monovalent, optionally substituted C1-18 hydrocarbon radicals, A is a radical —R1(—NR2—R1)z—NR2—H  (III), where R1 is a divalent C1-18 organic radical, R2 is a hydrogen atom or C1-18 hydrocarbon radical, X is a group capable of condensation, a is 0 or 1, b is 1 or 2, z is 0 or an integer from 1 to 10, are reacted with organic carbonates (2) containing a group of the formula —O—C(═O)O—  (IV), and, in a second stage, the first stage reaction products are optionally condensed with silanes (3) bearing groups capable of condensation, to give higher molecular weight organosilicon compounds containing urethane groups.
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