Silicone resins having a defined reactivity

A silicone resin composed of repeating units of the formula (1)

• [A1zR1pSiO(4-p-z)/2] (1)
• where z and p are each integers from 0-3,
• A1 are identical or different, and are hydrogen, alkyl radicals, cycloalkyl radicals, aryl radicals, alkoxy radicals having a linear or branched aliphatic or cycloaliphatic alkyl radical, or an aryloxy radical, or are a functional radical which contains up to 18 C atoms optionally including one or more identical or different heteroatoms selected from O, S, Si, Cl, F, Br, P, and N atoms,
• where
• R1 are identical or different aliphatic or cycloaliphatic alkoxy, aryloxy or hydroxyl radicals or are a radical A1,
• wherein T or Q units or both T and Q units present, and optionally M and/or D units, and the silicone resin contains at least 1 ppm of HCl.