the present invention relates to a class of acid functionalized gradient block copolymers , processes for obtaining them and to their uses including but not limited to hair fixatives , toughening agents , and adhesives . surprisingly , the applicant has discovered the aforementioned class of acid functionalized gradient block copolymers have advantageous properties and can find utility in a wide variety of application areas . these polymers are easily prepared by sequential monomer addition and the process does not require any post polymerization modification steps . the aforementioned polymers are derived from commonly utilized monomers . the use of common monomers provides both an economic advantage and an inherent safety advantage , e . g ., the common monomers are considered biocompatible .