Kev Paub Txog Kev Lag Luam: Polyurethane catalyst cov ntawv thov

Cov polyurethane catalyst kev lag luam plays qhov tseem ceeb ntawm kev tsim cov polyurethane ua npuas, ua rau cov neeg tsim khoom siv ua kom zoo nkauj, ua npuas ncauj, thiab cov khoom lag luam zoo kawg nkaus. Polyurethane catalysts yog qhov tseem ceeb hauv kev tsav cov tshuaj lom neeg ntawm polyols thiab ...