Patent ID: 8591904

Claim:
A composition comprising: (a) a modified randomly branched polyethyleneimine or polyoxazoline polymer without a core having a molecular weight of from about 500 to about 1,000,000 and comprising a functional group for branch formation, wherein said functional group is selected from the group consisting of —NH 2 , —NHR, —COOR, —COOH and a combination thereof, wherein R is an aliphatic or aromatic group; and wherein said functional group for branch formation is produced by reaction with a methyl acrylate, an ethylenediamine or both; (b) a bioactive material, wherein said bioactive material comprises a biological polymer, a hormone, a neurotransmitter or a drug; and (c) a carrier, excipient, diluent or combination thereof, wherein said composition is used to carry said bioactive material in or on a subject.