Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1993-05-11
1994-09-13
Teskin, Fred
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526 91, 526 93, 526140, 526141, 526142, 526144, 526335, C08F 218, C08F13606
Patent
active
053469712
ABSTRACT:
A process for producing polybutadiene essentially consisted of syndiotactic-1,2-polybutadiene in an aqueous medium includes a step off polymerizing diene essentially consisted of 1,3-butadiene in the presence of: (A) a catalyst composition including (a) a transition metal compound, and (b) an organometallic compound which includes a metal selected from the elements consisting off groups 1, 2, 12, and 13 of Periodic Table; (B) an initiator comprising at least one component selected from a group consisting of carbon disulfide, an isothiocyanate compound, and a xanthogenic compound; and (C) an inert organic liquid having a density of at least 1.10, thereby resultant particles of syndiotactic-1,2-polybutadiene have a diameter up to 2 min.
REFERENCES:
patent: 5011896 (1991-04-01), Bell et al.
Riddick et al, Organic Solvents (3rd ed.) Wiley-Interscience, N.Y., pp. 66, 348 (1970).
Akikawa Kazuhiro
Hongyo Kenichi
Suzuki Michinori
Teskin Fred
Ube Industries Ltd.
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