Syndiotactic 1,2-polybutadiene synthesis in an aqueous medium ut

Details Syndiotactic 1,2-polybutadiene synthesis in an aqueous medium ut Syndiotactic 1,2-polybutadiene synthesis in an aqueous medium ut

1992-10-05

1994-01-11

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, 526220, 5263401, 526903, 502108, 502111, 502117, C08F 4609, C08F 216

Patent

active

052782638

ABSTRACT:
Pure syndiotactic 1,2-polybutadiene is a thermoplastic resin which has double bonds attached in an alternating fashion to its polymeric backbone. Films, fibers and molded articles can be made utilizing syndiotactic 1,2-polybutadiene. It can also be blended into rubbers and cocured therewith. Syndiotactic 1,2-polybutadiene can be made by solution, emulsion or suspension polymerization. It typically has a melting point which is within the range of about 195.degree. C. to about 215.degree. C. However, it is often desirable for the syndiotactic 1,2-polybutadiene to have a melting point of less than about 195.degree. C. This invention discloses a process for preparing syndiotactic 1,2-polybutadiene having a melting point of less than about 195.degree. C. which comprises: polymerizing 1,3-butadiene monomer in an aqueous medium in the presence of (1) a catalyst composition which is made by reacting (a) at least one cobalt compound (b) at least one organoaluminum compound, and (c) at least one conjugated diene; (2) carbon disulfide; and (3) N,N-dibutylformamide. This invention further discloses that catalyst emulsion compositions made utilizing amino acid soaps, such as sodium lauroyl sarcosinate, have much better stability than those made with standard surfactants.

REFERENCES:
patent: 3778424 (1973-12-01), Sugiura et al.
patent: 3901868 (1975-08-01), Ueno et al.
patent: 4153767 (1979-05-01), Ueno et al.
patent: 4429085 (1984-01-01), Henderson et al.
patent: 4751275 (1988-06-01), Witte et al.
patent: 4902741 (1990-02-01), Burroway et al.
patent: 5011896 (1991-04-01), Bell et al.
patent: 5021381 (1991-06-01), Burroway et al.

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