Patent ID: 7572844

Claim:
A composition comprising a block polymer, a solvent, and a coloring material, and forming a micelle, wherein the composition undergoes a change from a first micelle state to a second micelle state different therefrom in response to stimuli, wherein the block polymer is an ABC block polymer consisting of polyvinyl ether, and respective blocks are an A block which is solvophobic, a B block which changes from solvophilic to solvophobic or from solvophobic to solvophilic in response to stimuli, and a C block which is solvophilic, wherein the solvent is water or an aqueous solvent, wherein the repeating unit structure of said polyvinyl ether is represented by the following general formula (1): —(CH 2 —CH(OR 1 ))— (1) where R 1 is selected from linear, branched, or cyclic alkyl groups having 1 to 18 carbon atoms, phenyl (Ph), pyridyl (Pyr), Ph-Ph, Ph-Pyr, or —(CH(R 2 )—CH(R 3 )—O) l —R 4 — or —(CH 2 ) m (O) n —R 4 —, wherein the hydrogen on Ph or Pyr can be substituted by a linear or branched alkyl group having 1 to 4 carbon atoms, and the carbon in Ph or Pyr can be substituted by nitrogen: 1 is selected from integers of 1 to 18, m is selected from integers of 1 to 36, and n is 0 or 1; R 2 and R 3 are each independently H or CH 3 ; R 4 comprises H, a linear, branched, or cyclic alkyl group having 1 to 18 carbon atoms, Ph, Pyr, Ph-Ph, Ph-Pyr, —CHO, —CH 2 CHO, —CO—CH═CH 2 , —CO—C(CH 3 )═CH 2 , or CH 2 COOR 5 , provided that when R 4 is other than hydrogen, the hydrogen on the carbon atom can be substituted by a linear or branched alkyl group having 1 to 4 carbon atoms, F, Cl or Br, and the carbon in Ph or Pyr can be substituted by nitrogen; and R 5 is H or an alkyl group having 1 to 5 carbon atoms, and wherein all blocks in said ABC block polymer have an oxyalkylene structure in at least a part of a side chain of said polymer.