Silyl ethers, a process for their production and their use as polymerization initiators

Claim 2

Silyl ethers corresponding to the formula: ##STR7## in which R 1 and R 2 represent phenyl, tolyl, p-tert.-butyl phenyl, o- and p-chlorophenyl, 2,4-dichlorophenyl, or m-methoxyphenyl, R 3 to R 8 independently of one another represent methyl, ethyl or phenyl, R 9 represents methyl or A, R 10 and R 11 represent chlorine, methyl or A, R 12 represents a silyl radical corresponding to the formula: ##STR8## and A represents a radical corresponding to the formula: ##STR9## the compounds of the formula II optionally containing the partial structure ##STR10## from one to twenty times.

Claim 3

A process for the production of silyl ethers, characterised in that 1 mole of an aryl silyl ketone corresponding to the formula: ##STR11## in which R 1 , R 3 , R 4 and R 5 are as defined in claim 1, and a substantially equivalent quantity of a base metal are reacted in an inert aprotic solvent at -10° to 70° C. with about 1 mole of a monochloro-organosilane corresponding to the formula R.sup.9 R.sup.10' R.sup.11' SiCl (VII) or with 0.4 to 0.8 mole of a dichloro-organosilane corresponding to the formula R.sup.9 R.sup.10' SiCl.sub.2 (VIII) or with 0.25 to 0.6 mole of a trichloro-organosilane corresponding to the formula R.sup.9 SiCl.sub.3 (IX) or with 0.1 to 0.7 mole of a tetrachlorosilane until the exothermic reaction has ceased, the reaction product is hydrolysed, the organic phase is separated off and the solvent removed under a pressure of from 2 to 6 Torr; R 9 being as defined in claim 9 and R 10' and R 11' representing the same substituents as defined in claim 9 for R 10 and R 11 except for A.

Claim 4

A process as claimed in claim 2, characterised in that the reaction of the aryl silyl ketone (VI) is carried out at a temperature of -5° to 50° C.

Claim 5

A process as claimed in claim 2, characterised in that 0.5 to 0.6 mole of the dichloro-organosilane (VIII) or 0.3 to 0.4 mole of the trichloro-organosilane (IX) or 0.1 to 0.7 mole of chlorine-containing polyorganosilane or siloxane having a molecular weight of from 150 to 1500 are used per mole of the aryl silyl ketone (VI).