Patent ID: 7381759

Claim:
A dispersible composition comprising a polymer compound, a functional substance, and an aqueous medium, the polymer compound being an amphipathic block polymer compound including a hydrophobic block segment having a monomor unit represented by the general formula (1) wherein A is a straight-chain or branched alkylene group of 1 to 15 carbon atoms with or without substitution; m is an integer of 0 to 30, and when m is 2 or more, A is the same or different with each other; B is a single bond or an alkylene with or without substitution; D is an aromatic ring unsubstituted or substituted with alkyl or alkoxy; n is an integer of 1 to 10, and when n is 2 or more, D is the same or different with each other; and wherein the amphipathic block polymer compound further includes a block segment represented by the general formula (2): wherein R 1 is selected from the group consisting of a straight, branched or cyclic alkyl group of 1 to 18 carbon atoms, Ph, Pyr, Ph-Ph, Ph-Pyr, —(CH(R 5 )—CH (R 6 )—O) p —R 7 and —(CH 2 ) m —(O) n —R 7 , where the aromatic ring may be substituted with a straight or branched alkyl group of 1 to 4 carbon atoms, and carbon atom in the aromatic ring may be replaced by nitrogen atom; P is an integer of 1 to 18, m is an integer of 1 to 36, and n is 0 or 1; R 5 and R 6 are each independently a hydrogen atom or CH 3 ; R 7 is selected from the group consisting of hydrogen atom, a straight, branched or cyclic alkyl group of 1 to 18 carbon atoms, Ph, Pyr, Ph-Ph, Ph-Pyr, —CHO,—CO—CH═CH 2 , —CO—C(CH 3 )═CH 2 and —CH 2 COOR 8 , and when R 7 is other than hydrogen atom, the hydrogen atom bound to the carbon atom may be replaced by a straight-chain or branched alkyl group of 1 to 4 carbon atoms, or F, Cl or Br, and the carbon atom in the aromatic ring may be replaced by nitrogen atom; R 8 is hydrogen atom, or an alkyl group of 1 to 5 carbon atoms; and Ph is phenyl group, and Pyr is pyridyl group wherein the functional substance is encapsulated in the polymer compound.