1. Highly Branched polycarbonates,characterized in that they are completely or partially substituted by linear or branched alkyl or alkenyl radicals having from 4-40 carbon atoms,- Obtained by converting highly branched polycarbonates during and / or after the polymerization reaction with the compounds A,- Contain a linear or branched alkyl and / or alkenyl radical having 4-40 carbon atoms and a reactive towards highly branched polycarbonate group,- Wherein the molar ratio of reactive groups substituting compound to reactive groups on the highly branched polymer is 1:10 to 1: 1, preferably from 1: 5 to 1: 1.1, particularly preferably from 1: 2 to 1: 1.2.2. Substituted highly branched polycarbonates according to claim 1, characterized in that the substitution is performed by R-CO-Y derivative of formulas and / or R-NCO,in whichR represents a linear or branched alkyl having 4-40 carbon atoms,Y is OR1, OC (O) R2, NR3 2Halogen,R1 is hydrogen, a linear or branched alkyl having 1-6 carbon atoms,R2 means a linear or branched alkyl having 4-40 carbon atoms, where the radicals R and R2 may be the same or different,R3 is hydrogen, a linear or branched alkyl having 1-4 carbon atoms, where the radicals R3 may be the same or different from each other.3. Cosmetic composition comprising at least one highly branched polycarbonate according to claim 1 or 2.4. A cosmetic composition according to claim 3, comprising at least one cosmetically suitable base.5. The use of highly branched polycarbonate according to any of claims 1-4 for cosmetic and / or dermatological compositions.6. The method of claim 5 in cosmetic compositions for the skin.7. Use according to claim 5 or 6 as a thickener.8. Use according to claim 5 or 6 as an oil thickener.1. Высокоразветвленные поликарбонаты,отличающиеся тем, что они полностью или частично замещены линейными или разветвленными алкильными или алкенильными остатками с 4-40 атомами углерода,- получены путем превращения высокоразветвленных поликарбонатов
