Asahi Kasei Begins Sales of Sustainable SSBR and BR on November 18, 2022 in Materials Asahi Kasei has begun in November selling solution-polymerized styrene-butadiene rubber (SSBR) and butadiene rubber (BR) using the mass balance method….... Membership Required You must be a member to access this content.View Membership LevelsAlready a member? Log in here Continue Reading