ith 1-10 carbon atoms), or a group of the general formula --OR7 (where R7 is a hydrocarbon radical with 1-20 carbon atoms, or a group of the general formula --Si(R8)3, where the symbols R8 are equal or different and represent a hydrogen atom and/or a hydrocarbon radical with 1-20 carbon atoms), and 0<s???3, which two components are, separately or in combination, supplied direct to the polymerizati