Lactamring enthaltendes Polymer

摘要

There is provided a lactam ring-containing polymer comprising: 20 to 100 molar % of a structural unit represented by the general formula (1); 0 to 70 molar % of a structural unit represented by the general formula (2); and 0 to 70 molar % of a structural unit represented by the general formula (3) and/or a structural unit represented by the general formula (4): (1) (2) (3) (4) wherein R1, R2 and R3 each represents a hydrogen atom or a methyl group, and X represents COOR4 and/or CONR5R6 in which R4, R5 and R6 each represents a hydrogen atom or a C1-C4 alkyl. The polymer is excellent in heat resistance and is expected to be used for resin modifiers, polymeric additives for petroleum tertiary recovery, and other various applications.