Copolymer

摘要

An object of the present invention is to provide a novel copolymer useful as a pigment dispersing agent in the field of color liquid crystal displays and the like. A copolymer of the present invention contains a block chain (A) comprising at least one repeating unit selected from the group consisting of a repeating unit having a tertiary amino group and a repeating unit having a quaternary ammonium base; and a block chain (B) comprising a repeating unit represented by formula (I) (wherein R1 represents a hydrogen atom or the like, R2 and R3 each independently represent a hydrogen atom or the like, Q represents an oxygen-containing saturated heterocyclic group optionally having an alkyl group as a substituent or the like, and n represents an integer of 0 to 6), and a repeating unit represented by formula (II) (wherein R4 represents a hydrogen atom or the like and R5 represents a saturated aliphatic hydrocarbon group or the like), and a copolymerization ratio of the repeating unit represented by formula (II) is 90 wt % or more in the block chain (B) excluding the repeating unit represented by formula (I).;

主权项

1. A copolymer consisting of:
a block chain (A) consisting of at least one repeating unit selected from the group consisting of a repeating unit having a tertiary amino group and a repeating unit having a quaternary ammonium base; and a block chain (R) consisting of a random copolymer comprising a repeating unit represented by formula (I):wherein;
R1 represents a hydrogen atom or a C1-C3alkyl group, R2 and R3 each independently represent a hydrogen atom or a C1-C6alkyl group, Q represents:
an oxygen-containing saturated heterocyclic group selected from the group consisting of:
an oxetanyl group,a tetrahydrofuranyl group,a tetrahydrofuranyl group, anda morpholinyl group,the oxygen-containing saturated heterocyclic optionally having an alkyl group as a substituent, and
n represents an integer of 0 to 6; and a repeating unit represented by formula (II):wherein R4 represents a hydrogen atom or a C1-C3alkyl group and R5 represents a saturated aliphatic hydrocarbon group or a saturated alicyclic hydrocarbon group,
wherein a copolymerization ratio of the repeating unit represented by formula (II) is 90 wt % or more in the block chain (B) excluding the repeating unit represented by formula (I).