Production of high-vinyl group, high-molecular weight unsaturate

Details Production of high-vinyl group, high-molecular weight unsaturate Production of high-vinyl group, high-molecular weight unsaturate

1974-12-09

1976-06-29

Smith, Edward J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

252431R, 252431C, 252431P, 526139, 526159, 526193, 526213, 526335, C08F 470, C08F 3606

Patent

active

039666972

ABSTRACT:
High molecular weight polybutadiene, polyisoprene and other hydrocarbon polymers having a high vinyl and a low 1,4-trans-double bond content, which are useful in the manufacture of tire treads and carcasses, are produced employing as catalyst system (a) a cobalt compound; (b) a halogen-containing organoaluminum compound; and (c) a tris-(aryl) phosphite of the formula P--(OR.sub.1), (--OR.sub.2),--OR.sub.3 wherein R.sub.1, R.sub.2 and R.sub.3 are monocyclic halogenated aryl, or diaryl, naphthyl, anthracenyl or phenanthryl or the corresponding halogenated and/or alkylated polycyclic aryl; and optionally (d) an H-acidic compound, e.g., water.

REFERENCES:
patent: 3040016 (1962-06-01), Balas
patent: 3066127 (1962-11-01), Carlson et al.
patent: 3111510 (1963-11-01), Balas
patent: 3502637 (1970-03-01), Marullo et al.

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