Addition-crosslinking silicone resin compositions comprising A) at least one branched, self-crosslinking organopolysiloxane of the general formula (R 1 R 2 R 3 SiO 1/2) M (R 4 R 5 SiO 2/2) D (R 6 SiO 3/2) T (SiO 4/2) Q, where - R 1 to R 6 are mutually independently monovalent, optionally substituted hydrocarbon moieties which can have interruption by heteroatoms, or are an OH group, or a hydrogen atom, - M, D, T, and Q are a number from 0 to < 1, with the proviso that M+D+T+Q=1 and Q+T>0, and with the proviso that a molecule A) comprises, as moieties R 1 to R 6, - at least two alkenyl groups, - at least two hydrogen atoms, and - at least one aryl group, and with the proviso that at least 5 mol% of all of the subunits of A) take the form (R 4 R 5 SiO 2/2) D, with the proviso that at least 6 mol% of all of the subunits (R 4 R 5 SiO 2/2) D are present as chain segments made of from 3 to 200 adjacent subunits in A), and the moieties R 4 and R 5 of said subunits present as chain segments are neither a hydrogen atom nor an alkenyl moiety, - where the molar ratio of the silicon-bonded repeating units bearing alkenyl groups to the repeating units bearing silicon-bonded hydrogen atoms is at least 0.75; and - where the molar proportion of the silicon atoms bearing at least one aryl moiety to the total number of the silicon atoms is at least 30%; and - where the molar proportion of the alkyl groups, based on the total number of the silicon-bonded moieties is at most 70%, C) a sufficient quantity of at least one catalyst that promotes the addition reaction of Si-bonded hydrogen onto aliphatic double bonds, where the molar ratio of silicon-bonded alkenyl groups to silicon-bonded hydrogen atoms in the addition-crosslinking silicone resin composition is from 0.5:1 to 2:1. A) at least one branched, self-crosslinking organopolysiloxane of the general formula (R 1 R 2 R 3 SiO 1/2) M (R 4 R 5 SiO 2/2) D (R 6 SiO 3/2) T (SiO 4/2) Q, where - R 1 to R 6 are mutually independently monovalent, optionally substituted hydrocarbon moieties which can have interruption by heteroatoms, or are an OH group, or a hydrogen atom, - M, D, T, and Q are a number from 0 to < 1, with the proviso that M+D+T+Q=1 and Q+T>0, and with the proviso that a molecule A) comprises, as moieties R 1 to R 6, - at least two alkenyl groups, - at least two hydrogen atoms, and - at least one aryl group, and with the proviso that at least 5 mol% of all of the subunits of A) take the form (R 4 R 5 SiO 2/2) D, with the proviso that at least 6 mol% of all of the subunits (R 4 R 5 SiO 2/2) D are present as chain segments made of from 3 to 200 adjacent subunits in A), and the moieties R 4 and R 5 of said subunits present as chain segments are neither a hydrogen atom nor an alkenyl moiety, - where the molar ratio of the silicon-bonded repeating units bearing alkenyl groups to the repeating units bearing silicon-bonded hydrogen atoms is at least 0.75; and - where the molar proportion of the silicon atoms bearing at least one aryl moiety to the total number of the silicon atoms is at least 30%; and - where the molar proportion of the alkyl groups, based on the total number of the silicon-bonded moieties is at most 70%, - R 1 to R 6 are mutually independently monovalent, optionally substituted hydrocarbon moieties which can have interruption by heteroatoms, or are an OH group, or a hydrogen atom, - M, D, T, and Q are a number from 0 to < 1, - at least two alkenyl groups, - at least two hydrogen atoms, and - at least one aryl group, - where the molar ratio of the silicon-bonded repeating units bearing alkenyl groups to the repeating units bearing silicon-bonded hydrogen atoms is at least 0.75; and - where the molar proportion of the silicon atoms bearing at least one aryl moiety to the total number of the silicon atoms is at least 30%; and - where the molar proportion of the alkyl groups, based on the total number of the silicon-bonded moieties is at most 70%, C) a sufficient quantity of at least one catalyst that promotes the addition reaction of Si-bonded hydrogen onto aliphatic double bonds,