Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1982-12-23
1984-07-31
Smith, Edward J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526136, 526335, 526903, 526904, C08F 470, C08F 3606
Patent
active
044631464
ABSTRACT:
This invention reveals a very useful process for producing polybutadiene composed essentially of syndiotactic 1,2-polybutadiene in tetrahydrofuran comprising polymerizing 1,3-butadiene in said tetrahydrofuran in the presence of (1) a catalyst composition microencapsulated in a polyene product which contains (a) at least one cobalt compound selected from the group consisting of (i) .beta.-diketone complexes of cobalt, (ii) .beta.-keto acid ester complexes of cobalt, (iii) cobalt salts of organic carboxylic acids having 6 to 15 carbon atoms, and (iv) complexes of halogenated cobalt compounds of the formula CoX.sub.n, wherein X represents a halogen atom and n represents 2 or 3, with an organic compound selected from the group consisting of tertiary amines, alcohols, tertiary phosphines, ketones and N,N-dialkylamides, and (b) at least one organoaluminum compound of the formula AlR.sub.3, wherein R represents a hydrocarbon radical of 1 to 6 carbon atoms; and (2) carbon disulfide. This polymerization technique is very useful in the synthesis of syndiotactic 1,2-polybutadiene which will be used in articles for packaging, transportation, or storing of foods since it employs tetrahydrofuran as its polymerization medium.
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Barbour John J.
Bell Anthony J.
Donbar Ken W.
Henderson James N.
Rockhill Alvin T.
Smith Edward J.
The Goodyear Tire & Rubber Company
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