| US 7,572,844 B2 | ||
| Stimuli-responsive composition, and image-forming method and apparatus using the composition | ||
| Koichi Sato, Kanagawa (Japan); Ikuo Nakazawa, Kanagawa (Japan); Sakae Suda, Kanagawa (Japan); Masayuki Ikegami, Kanagawa (Japan); Sadahito Aoshima, Toyonaka (Japan); and Shinji Sugihara, Fukui (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Mar. 01, 2006, as Appl. No. 11/363,954. | ||
| Application 11/363954 is a division of application No. 10/212082, filed on Aug. 06, 2002, granted, now 7,067,590. | ||
| Claims priority of application No. 2001-239372 (JP), filed on Aug. 07, 2001; and application No. 2002-157821 (JP), filed on May 30, 2002. | ||
| Prior Publication US 2006/0148997 A1, Jul. 06, 2006 | ||
| Int. Cl. C09D 11/00 (2006.01) | ||
| U.S. Cl. 523—160 [523/161] | 17 Claims |
| 1. 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):
—(CH2—CH(OR1))— (1)
where R1 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(R2)—CH(R3)—O)l—R4— or —(CH2)m(O)n—R4—, 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; R2 and R3 are each independently H or CH3; R4 comprises H, a linear, branched, or cyclic alkyl group having 1 to 18 carbon atoms, Ph, Pyr, Ph-Ph, Ph-Pyr, —CHO, —CH2CHO, —CO—CH═CH2, —CO—C(CH3)═CH2, or CH2COOR5, provided that when R4 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 R5 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.
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