Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Patent
1997-09-09
1999-03-09
Teskin, Fred M.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
428402, 523207, 524571, 524856, 526129, 526136, 526139, 526140, 526161, 5261691, 526335, 526901, B32B 2516, C08F 470, C08F13606
Patent
active
058798056
ABSTRACT:
A process for the preparation of a 1,2-vinyl-polybutadiene with an adjustable amount of vinyl linkages in the microstructure of the polymer which comprises polymerizing 1,3-butadiene in a gas phase reactor under polymerization conditions using an inert gas in the presence of a catalyst comprising: (a) a cobalt compound; (b) a compound selected from the group consisting of a phosphine, a xanthogen, a thiocyanide, a carbon disulfide, and mixtures thereof; and (c) an organoaluminum compound, and optionally a modifier (d) can be included in the catalyst composition. There is also provided a novel resin particle prepared by the process.
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Ashitaka, Hidetomo et al., "Syndiotactic 1,2-Polybutadiene with Co-CS.sub.2 Catalyst System. II. * Catalysts for Stereospecific Polymerization of Butadiene to Syndiotactic 1,2-Polybutadeine", Journal of Polymer Science: Polymer Chemistry Edition, vol. 21, 1951-1972 (1983).
Ashitaka, Hidetomo et al., "Syndiotactic 1,2-Polybutadiene with Co-CS.sub.2 Catalyst System. I. Preparation, Properties, and Application of Highly Crystalline Syndiotactic 1,2-Polybutadiene", Journal of Polymer Science: Polymer Chemistry Edition, vol. 21, 1853-1860 (1983).
Brady Monika
Cann Kevin Joseph
Deppenbrock B. L.
Teskin Fred M.
Union Carbide Chemicals & Plastics Technology Corporation
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