units of the formula me 3 sio 1 2 where me is the methyl radical ph is the phenyl radical and r 4 is the methyl ethyl or butyl radical preferably the methyl radical with the resin containing preferably 0 2 mol of q units 0 2 mol of d units and 0 2 mol of m units per mol of t units preferred examples of silicone resins b are organopolysiloxane resins which consist substantially preferably exclusively of t units of the formulae phsio 3 2 phsi or 4 o 2 2 and phsi or 4 2 o 1 2 and t units of the formulae mesio 3 2 mesi or 4 o 2 2 and mesi or 4 2 o 1 2 and also optionally d units of the formulae me 2 sio 2 2 and me 2 si or 4 o 1 2 where me is the methyl radical ph is the phenyl radical and r 4 is the methyl ethyl or butyl radical preferably the methyl radical the molar ratio of phenylsilicone to methylsilicone units is between 0 5 and 2 0 the amount of d units in these silicone resins is preferably below 10 wt additionally preferred examples of silicone resins b are organopolysiloxane resins which consist substantially preferably exclusively of t units of the formulae phsio 3 2 phsi or 4 o 2 2 and phsi or 4 2 o 1 2 where ph is the phenyl radical and r 4 is the methyl ethyl or butyl radical preferably the methyl radical the silicone resins b preferably possess a number average molar mass m n of at least 400 g mol and more preferably of at least 600 g mol the.