Olefinically unsaturated radial styrenic block copolymer and an improved vulcanizer-free latex comprising water and said radial styrenic block copolymer

摘要

The invention concerns an olefinically unsaturated radial styrenic block copolymer having the general formulaA-B—Y—(B-A)_n wherein each A is independently a polymer block composed of at least 90 mol. % of an alkenyl aromatic hydrocarbon, each B is independently a polymer block composed of at least 90 mol. % of one or more conjugated dienes, Y is the remnant of a coupling agent, and n is an integer from 2 to 5. The invention is also an improved vulcanizer-free latex comprising water and the olefinically unsaturated radial styrenic block copolymer. Moreover, the invention concerns a process for preparing articles by coagulation dipping from the improved latex and dipped goods made from such latex.