Patent ID: 8247590

Claim:
A method of preventing polymerization in the preparation or handling of unsaturated organosilicon compounds (S) of the formula (2) H 2 C═C(R 1 )C(O)O—(R 2 ) y —Si(R 3 ) z (OR 4 ) 3-z (2) which are prepared from a haloalkylsilane of the formula (3) X—(R 2 ) y —Si(R 3 ) z (OR 4 ) 3-z (3) and a salt of a (meth)acrylate having anions of the formula (4) H 2 C═C(R 1 )C(O)O − (4) in the presence of stabilizers, where X is a halogen atom, R 1 is a hydrogen atom or a linear or branched hydrocarbon radical having 1-10 carbon atoms, R 2 is a linear or branched hydrocarbon radical which has 1-40 carbon atoms optionally containing one or more nitrogen, oxygen, sulfur or phosphorus heteroatoms, R 3 and R 4 are linear or branched hydrocarbon radicals having 1-10 carbon atoms, y is 0 or 1 and z is 0, 1 or 2, wherein at least the synthesis of the organosilicon compounds (S) and the distillative purification of the organosilicon compounds (S) is carried out in an industrial apparatus (A), at least 70% of whose surfaces which come into contact with the organosilicon compounds (S) comprise an iron-free material, where a material is designated as iron-free when it contains less than 1% by weight of iron, and is selected from the group consisting of glass, enamel, plastic, graphite, oxide ceramics, silicon carbide, silicon nitride, and mixtures thereof, and the industrial apparatus (A) is either an apparatus for a batch process having a fill volume of at least 200 l or an apparatus for a continuous process having a throughput of at least 15 l/h.