| US 7,446,135 B2 | ||
| Block copolymeric dispersant for pigment particle in aqueous system, and ink composition comprising the same | ||
| Cheol Ham, Yongin-si (Korea, Republic of); Seung-min Ryu, Yonin-si (Korea, Republic of); and Su-aa Jung, Suwon-si (Korea, Republic of) | ||
| Assigned to Samsung Electroncis Co., Ltd., Suwon-si, Gyeonggi-do (Korea, Republic of) | ||
| Filed on Dec. 02, 2004, as Appl. No. 11/922. | ||
| Claims priority of application No. 10-2003-0095526 (KR), filed on Dec. 23, 2003. | ||
| Prior Publication US 2005/0132931 A1, Jun. 23, 2005 | ||
| Int. Cl. C09D 11/00 (2006.01) | ||
| U.S. Cl. 523—160 [523/161] | 11 Claims |
| 1. A dispersant comprising a block copolymer having both a hydrophilic moiety and a hydrophobic moiety and a hydrophobic substituent
attached to a terminal end of said hydrophobic moiety,
wherein said hydrophilic moiety comprises a repeating unit represented by Formula I below:
 wherein,
R1 is H or a C1-C6 alkyl group;
X is H, a substituted or unsubstituted C1-C20 alkyl group, a C1-C20 alkenyl group, a C1-C20 alkynyl group, a C1-C20 alkoxy group, a substituted or unsubstituted C6-C20 aryl group, a substituted or unsubstituted C2-C20 heteroaryl group or a substituted or unsubstituted C7-C20 arylalkyl group;
Y is —OA, —COOA, —SO2A, —SO2NH2, —SO2NHCOT1, —T2SO3A, —SO3A, —PO3NH2, —PO3A2, —NH2 or —N(T1)2, wherein A is a hydrogen atom, an alkali metal, or N(Q1)(Q2)(Q3)(Q4) in which Q1, Q2, Q3 or Q4 each independently represents a hydrogen atom, a C1-C20 alkyl group or a C6-C20 aryl group; T1 is a C1-C20 alkyl group, a C6-C20 aryl group or a C2-C20 heteroaryl group; T2 is a C1-C20 alkylene group, a C6-C20 arylene group or a C2-C20 heteroarylene group; and
m is an integer of 2 to 150,
wherein said hydrophobic moiety comprises a repeating unit represented by Formula II below:
 wherein
R2 is H or a C1-C6 alkyl group;
R3 is a substituted or unsubstituted C1-C20 alkyl group, a C1-C20 alkenyl group, a C1-C20 alkynyl group, a C1-C20 alkoxy group, a substituted or unsubstituted C6-C20 aryl group, a substituted or unsubstituted C2-C20 heteroaryl group or a substituted or unsubstituted C7-C20 arylalkyl group;
Z is H, a substituted or unsubstituted C1-C20 alkyl group, a C1-C20 alkenyl group, a C1-C20 alkynyl group, a C1-C20 alkoxy group, a substituted or unsubstituted C6-C20 aryl group, a substituted or unsubstituted C2-C20 heteroaryl group or a substituted or unsubstituted C7-C20 arylalkyl group; and
n is an integer of 2 to 150,
wherein the hydrophobic substituent is a substituted or unsubstituted C1-C20 alkyl group, a substituted or unsubstituted C6-C20 aryl group, a substituted or unsubstituted C2-C20 heteroaryl group, or a substituted or unsubstituted C7-C20 arylalkyl group,
wherein said hydrophobic substituent is included in an amount of 0.05 to 90 parts by weight based on total weight of said
dispersant.
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