abstract |
314,933. Gosudarstvennyi Trest Rezinovoi Promyshlennosti (Resinotrest), and Bysow, B. W. April 5, 1928. Caoutchouc, synthetic. - Butadiene and its homologues are polymerized in the presence of mixtures of substances having tautomeric properties. Examples describe the use of (1) a mixture of benzoylacetic ester and diazoaminobenzene; (2) a mixture of benzoylacetic ester and phenyl isothiocyanate. |