a non - silicone release material for use with pressure sensitive adhesives , which contains a copolymer of : an acrylate ester of the formula i : ## str1 ## wherein x ranges from about 30 to about 50 ; and at least one comonomer selected from a vinyl monomer , an acrylate monomer or a methacrylate monomer . preferably , the acrylate ester is about 1 to about 25 % by weight of the copolymer composition . the release material can be used as a backsize for pressure sensitive adhesives , particularly repositionable labels .