| 摘要 |
PROBLEM TO BE SOLVED: To provide an antistatic agent giving permanent antistaticity to a molding without affecting appearance of the molding and physical properties of the molding such as mechanical strength, heat-sealability, etc.SOLUTION: An antistatic agent (X) includes a block polymer (A) in which a block of polyolefin (a), a block of polyisobutylene (aa) and a block of a hydrophilic polymer (b) with a volume resistivity value of 1×10to 1×10&OHgr; cm are bonded through at least one bond selected from the group consisting of an ester bond, amide bond, ether bond, imide bond and urethane bond, where (a) is a polyolefin except polyisobutylene, and (A) is a polymer having a structure in which (a), (aa) and (b) are bonded in a format expressed by general formula (1): Z-[b]-{[a]-[b]}-Z. In formula, [a] is a block of the polyolefin (a); [b] is a block of the hydrophilic polymer (b); Zand Zeach independently a block [aa] of [a] or polyisobutylene (aa), provided that there is no case that both Zand Zare [a]; and n is a number of 1 to 30. |
