Urea-functional organopolysiloxanes containing units of the formula
RnSiO(4-n)/2 (I),
where R is a radical R1 or a radical —OR2 or a radical Q, Q is a urea-functional radical of the formula
—R5—[NR4—R6—]xNR4R3 (II),
where the radicals R4 are identical or different and are each a radical R4′ or a radical Ru, where R4′ is hydrogen or a monovalent C1-C6-hydrocarbon radical where Ru is radical of the formula —C(═O)—NH2, and where at least one urea-functional radical Q having a radical Ru is present per molecule are prepared by reacting amino-functional organopolysiloxanes comprising units of the formula
R′nSiO(4-n)/2 (IV),
where A is an amino-functional radical of the formula
—R5—[NR4′—R6—]xNR4′R3 (V),
with the proviso that at least one amino-functional radical A is present per molecule in the organopolysiloxanes made up of units of the formula (III),
with ortho-substituted aryl carbamates of the formula
R7—Ar—O—C(═O)—NH2 (VI),
where Ar is an ortho-substituted aryl radical.
含有式中单元的
脲官能有机聚
硅氧烷
RnSiO(4-n)/2 (I)、
其中 R 是基 R1 或基 -OR2 或基 Q,Q 是式中的
脲官能基
-R5-[NR4-R6-]xNR4R3(II)、
其中自由基 R4 相同或不同,且各自为自由基 R4′ 或自由基 Ru,其中 R4′ 为
氢或一价 C1-C6-烃自由基,其中 Ru 为式-C(═O)-NH2 的自由基,且每个分子中至少存在一个具有自由基 Ru 的
脲官能团自由基 Q,该有机聚
硅氧烷是通过使包含式中单元的
氨基官能团有机聚
硅氧烷反应制备的。
R′nSiO(4-n)/2 (IV)、
其中 A 是式中的
氨基官能基
-R5-[NR4′-R6-]xNR4′R3(V)、
但在由式(III)单元组成的有机聚
硅氧烷中,每个分子至少含有一个
氨基官能团 A、
式中的正交取代芳基
氨基甲酸酯
R7-Ar-O-C(═O)-NH2 (VI)、
其中 Ar 为正代芳基。