| 摘要 |
1484045 Conjugated diene polymerization catalyst CHEMISCHE WERKE HULS AG 11 Dec 1974 [12 Dec 1973] 53514/74 Heading C3P Conjugated dienes are polymerized to relatively low molecular weight products in the presence of a catalyst comprising (a) cobalt octoate and/or acetylacetonate, (b) diethylaluminium chloride, (c) an organic phosphorus compound of the formula PR<SP>1</SP>R<SP>2</SP>R<SP>3</SP> or where R<SP>1</SP> to R<SP>3</SP> are aryl or alkenyl and R<SP>4</SP> to R<SP>6</SP> are alkenyl or a monocyclic aryl or aralkyl group and optionally (d) water, an alcohol or an organic acid. Products with substantially increased proportions of vinyl or substituted vinyl groups are obtained. In examples, butadiene or isoprene are polymerized in solution or in bulk in the presence of compounds (a) and (b), and (c) (C 6 H 5 ) 3 P, (C 6 H 5 O) 3 P, (C 6 H 5 ) 2 (CH 2 =CH-CH 2 -)-P, (CH 2 =CH-CH 2 -O) 3 P, or (CH 2 =CH-CH 2 -)- 3 P and (d) H 2 O, iProH or CF 3 .COOH.
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