Patent ID: 6916861
Filing Date: 2005-07-12
Classification: C08G,C09D,C12P,Y10T

Abstract:
1. A pigment ink containing a color material with at least part of surfaces of pigment particles covered with polyhydroxyalkanoate, and a medium for dispersion of the color material. wherein said polyhydroxyalkanoate comprised of at least one selected from the group consisting of monomer units expressed by Formulas [1] to [10]: (wherein symbol “a” represents an integer, and the combination of R1 and “a” is selected from the group consisting of a combination of a hydrogen atom and any one integer selected from the group consisting of 0 to 10; a combination of a halogen atom and any one integer selected from the group consisting of 1 to 10; a combination of a chromophoric group and any one integer selected from the group consisting of 1 to 10; a combination of a carboxyl group or a salt thereof and any one integer selected from the group consisting of 0 to 10; and a combination of  and any one integer selected from the group consisting of 1 to 7), (wherein b represents any one integer selected from the group consisting of 0 to 7, and R2 is selected from the group consisting of a hydrogen atom (H), a halogen atom, —CN, —NO 2 , —CF 3 , —C 2 F 5 and —C 3 F 7 ), (wherein c represents any one integer selected from the group consisting of 1 to 8, and R3 is selected from the group consisting of a hydrogen atom (H), a halogen atom, —CN, —NO 2 , —CF 3 , —C 2 F 5 and —C 3 F 7 ), (wherein d represents any one integer selected from the group consisting of 0 to 7, and R4 is selected from the group consisting of a hydrogen atom (H), a halogen atom, —CN, —NO 2 , —CF 3 , —C 2 F 5 and —C 3 F 7 ), (wherein e represents any one integer selected from the group consisting of 1 to 8, and R5 is selected from the group consisting of a hydrogen atom (H), a halogen atom, —CN, —NO 2 , —CF 3 , —C 2 F 5 , C 3 F 7 , —CH 3 , —C 2 H 5 and —C 3 H 7 ), (wherein f represents any one integer selected from the group consisting of 0 to 7), (wherein g represents any one integer selected from the group consisting of 1 to 8), (wherein h represents any one integer selected from the group consisting of 1 to 7, and R6 is selected from the group consisting of a hydrogen atom (H), a halogen atom, —CN, —NO 2 , —COOR′, —SO 2 R″, —CH 3 , —C 2 H 5 , —C 3 H 7 , —CH(CH 3 ) 2 and —C(CH 3 ) 3 , wherein R′ is selected from the group consisting of a hydrogen atom (H), Na, K, —CH 3 and —C 2 H 5 , and R″ is selected from the group consisting of —OH, ONa, —OK, a halogen atom, —OCH 3 and —OC 2 H 5 ), (wherein i represents any one integer selected from the group consisting of 1 to 7, and R7 is selected from the group consisting of a hydrogen atom (H), a halogen atom, —CN, —NO 2 , —COOR′ and —SO 2 R″, wherein R′ is selected from the group consisting of a hydrogen atom (H), Na, K, —OH 3 and —C 2 H 5 , and R″ is selected from the group consisting of —OH, —ONa, —OK, a halogen atom, —OCH 3 and —OC 2 H 5 ), and (wherein j represents any one integer selected from the group consisting of 1 to 9).