| US 7,348,382 B2 | ||
| Polyvinyl alcohol based block copolymer and pigment dispersion aqueous liquid using the same and recording liquid | ||
| Nobuhiko Ueno, Kanagawa (Japan); Takahiro Saitou, Mie (Japan); Masanobu Yokoyama, Mie (Japan); Hideko Akai, Kanagawa (Japan); and Hideaki Tanaka, Tokyo (Japan) | ||
| Assigned to Mitsubishi Chemical Corporation, Tokyo (Japan) | ||
| Filed on Oct. 03, 2005, as Appl. No. 11/240,619. | ||
| Application 11/240619 is a continuation of application No. PCT/JP2004/004659, filed on Mar. 31, 2004. | ||
| Claims priority of application No. 2003-099276 (JP), filed on Apr. 02, 2003; and application No. 2003-164779 (JP), filed on Jun. 10, 2003. | ||
| Prior Publication US 2006/0089423 A1, Apr. 27, 2006 | ||
| Int. Cl. C08F 293/00 (2006.01); C09D 17/00 (2006.01); C09D 11/00 (2006.01) | ||
| U.S. Cl. 526—87 [526/330; 526/331; 526/923] | 17 Claims |
1. A polyvinyl alcohol based block copolymer represented by the following general formula (1):
 wherein:
A represents a polyvinyl alcohol based block;
B represents a block containing a hydrophobic segment B′ and a hydrophilic or hydrophobic segment B″ other than A and B′,
the block B comprising a charge group;
X1, X2, X3, and X4 each independently represents a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an aralkyl group, or an aryl
group;
m1 represents an integer of from 1 to 5;
m2 represents an integer of from 0 to 4; and
(m1+m2) represents an integer of from 1 to 5.
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