Patent ID: 8206744

Claim:
A polyamino acid comprising an amino acid unit selected from aspartic units, glutamic units or a mixture of aspartic units and glutamic units, wherein at least one of said aspartic units or glutamic units carries one or more mutually identical or different hydrophobic groups (GH), wherein said GH is coupled with an acid group of said polyamino acid, wherein said polyamino acid comprises at least one type of polyamino acid main chain Cp comprising aspartic units or glutamic units and having one or more mutually identical or different polyamino acid branches B comprising aspartic units or glutamic units, and wherein said GH is selected from the group consisting of: linear or branched C8 to C30 alkyl groups, linear or branched C8 to C30 alkyl groups comprising at least one unit of unsaturation or at least one heteroatom, C8 to C30 alkylaryl or arylalkyl groups, C8 to C30 alkylaryl or arylalkyl groups further comprising at least one unit of unsaturation or at least one heteroatom, C8 to C30 (poly)cyclic groups, and C8 to C30 (poly)cyclic groups comprising at least one unit of unsaturation or at least one heteroatom.