Process for the preparation of crosslinkable materials based on organosilicon compounds

A process for the preparation of materials crosslinkable with elimination of alcohols to give elastomers, wherein

• (A) at least one organopolysiloxane having at least two hydroxyl groups,
• (B) at least one silane of the formula
• RSi(OR1)3 (I),
• in which each R independently is a methyl or vinyl radical and each R1 may be identical or different and is a methyl or ethyl radical, and/or the partial hydrolysis products thereof, with the proviso that silanes of the formula (I) and/or the partial hydrolysis products thereof are used in amounts of at least 0.7 part by weight, based on 100 parts by weight of component (A),
• (C) an organosilicon compound which has at least one radical bonded to silicon via carbon, said radical further comprising basic nitrogen,
• (D) a tin catalyst,
• (E) optionally fillers, and
• (F) optionally stabilizers and are mixed with one another,
• (A) and (B) forming a reaction product with elimination of alkanol, with the proviso that the tin catalyst (D) is added to the component (A) or the mixture containing the reaction product thereof only when from 20 to 60% of the Si—OH groups originally present remain present.