Patent ID: 8748554

Claim:
A process for producing high molecular weight silicone resins with a weight average molar mass Mw of at least 5000 g/mol and with a polydispersity of at most 65, comprising: hydrolyzing and condensing (A) at least one silicon-bonded alkoxylated silicone resin intermediate or silicon-bonded alkoxylated and hydroxylated silicone resin intermediate, or mixture thereof, with (C) a basic or acidic catalyst mixture thereof which is not completely self-neutralizing, (D) water, and (E) in the presence of an aliphatic carboxylic ester as a sole process solvent, with the provisos that I) alcohol resulting from hydrolyzing and condensing is removed from the reaction mixture by distillation, II) the catalyst (C) is deactivated by thermal treatment or by neutralization, and III) a portion of aliphatic carboxylic ester solvent (E) remains in the final product.