Patent ID: 8115025

Claim:
A process for preparing β-ketocarbonyl-functional organosilicon compounds, comprising: in a first step, reacting at least one organosilicon compound which contains at least one Si-bonded radical A of the formula —R 1 —NR 2 2 (II) per molecule, where R 1 is a divalent C 2-10 organic radical optionally containing one or more heteroatoms selected from the group consisting of oxygen, sulfur and nitrogen, R 2 is a hydrogen atom or a C 1-100 organic radical which optionally contain nitrogen atoms, with the proviso that the radical A of the formula (II) has at least one primary amino group and optionally one or more secondary amino groups, with at least one organic compound which retards or prevents the reaction of primary or secondary amino groups with β-carbonyl compounds, and in a second step, reacting a product obtained in the first step with at least one diketene precursor compound which eliminates diketenes of the formula where R 3 is a hydrogen atom or a hydrocarbon radical having from 1 to 18 carbon atoms.