Use of sunscreen combinations comprising, as essential constituent, amino-substituted hydroxybenzophenones as photostable UV filters in cosmetic and pharmaceutical preparations

A cosmetic or pharmaceutical preparation comprising sunscreen combinations for the protection of the human epidermis or human hair against UV light in the range from 280 to 400 nm, which comprises, in a cosmetically and pharmaceutically suitable carrier, as photostable UV filters, effective amounts of sunscreen combinations which have

• A) compounds absorbing essentially in the UV-A region and
• B) further compounds absorbing in the UV-A region, in the UV-B region and over both regions,
• where the constituents (A) absorbing in the UV-A region comprise effective amounts of at least
• Aa) one hydroxybenzophenone of the formula I
• in which
• R1 and R2 independently of one another are hydrogen, C1-C20-alkyl, C3-C10-cycloalkyl or C3-C10-cycloalkenyl, where the substituents R1 and R2, together with the nitrogen atom to which they are bonded, can form a 5- or 6-membered ring and
• R3 is C1-C20-alkyl
• and optionally additionally
• Ab) 4,4′-diarylbutadienes of the formula II
• in which
• R4 and R5 independently of one another are hydrogen, C1-C20-alkyl, C3-C10-cycloalkyl or C3-C10-cycloalkenyl
• and the constituents
• B) have an effective amount of at least one compound chosen from the group consisting of
• Ba) dibenzoylmethane compounds of the formula III
• in which
• R6 is C1-C12-alkyl and
• R7 is hydrogen, C1-C12-alkyl or C1-C12-alkoxy,
• Bb) triazine derivatives of the formula IV
• in which
• R8 to R10 independently of one another are optionally substituted C1-C20-alkyl, C5-C10-aryl, C5-C10-heteroaryl or SpSil, where Sp is a spacer and Sil is a silane, oligosiloxane or polysiloxane radical,
• X is the divalent radical
• —O— or
• where
• R11 is hydrogen or optionally substituted C1-C20-alkyl, C5-C10-aryl or C5-C10-heteroaryl,
• Bc) triazine derivatives of the formula V
• in which at least one o-hydroxyl group and at least one p-alkoxy group having 1 to 20 carbon atoms are bonded to the phenyl rings,
• Bd) the benzotriazole derivative of the formula VI
• Be) the benzimidazole derivative of the formula VII
• and salts
• Bf) the benzotriazole derivative of the formula VIII
• Bg) o,o′,p,p′-tetrahydroxybenzophenone of the formula IX
• Bh) an organosiloxane benzalmalonate of the formula Xa
• in which
• V1′ is the group
• V1 is a methyl group or V1′, or of the formula Xb
• in which V2′ is the group of the structure
• V2 is a methyl group of V2′
• or mixtures of compounds of the formulae Xa and Xb,
• where t is a value up to 100 and u is a value up to 20 with the proviso that u=0, when V1=V1′ and/or V2=V2′, and u is a value from 1 to 20, when V1=CH3 and/or V2=CH3,
• as photostable UV filters in cosmetic and pharmaceutical preparations for protecting human skin or human hair against solar rays, optionally together with other compounds which absorb in the UV region and which are known per se for cosmetic and pharmaceutical preparations,
• optionally together with other compounds which absorb in the UV region and which are known per se for cosmetic and pharmaceutical preparations.