ISOBUTYLENE-BASED BLOCK COPOLYMER PELLET HAVING EXCELLENT ANTIBLOCKING CHARACTERISTIC

摘要

PROBLEM TO BE SOLVED: To provide an isobutylene-based block copolymer pellet the blocking of which caused at production, transportation and processing is prevented, and which is obtained by polymerizing isobutylene and an aromatic vinyl compound. SOLUTION: The isobutylene-based block copolymer pellet having excellent antiblocking characteristics is obtained by dipping a strand of an isobutylene-based block copolymer into a solution containing a lubricant to attach the lubricant on the surface, and pelletizing the resultant strand so that the ratio of the area of the side/the area of the cross section caused by cutting may be≥1. COPYRIGHT: (C)2004,JPO&NCIPI