 BERWYN, Pa. GELEEN, The Netherlands--BUSINESS WIRE--- TSE materials--Trinseo NYSE: TSE and ETB have signed a letter of intent to collaborate on the development of purified bio-based 1,3-butadiene. This will see the two companies combine their respective technology and process expertise to accelerate the development of viable, renewably sourced material solutions. Under the partnership, the companies will jointly explore opportunities to scale up ETBs unique single-stage process to produce bio-based 1,3-b 