Method for the production of diene rubbers in the gas phase

Details Method for the production of diene rubbers in the gas phase Method for the production of diene rubbers in the gas phase

1997-03-04

1999-06-22

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526129, 526136, 526139, 526141, 526142, 526153, 526901, 5253319, 525351, 525938, C08C 1908, C08F 234

Patent

active

059143770

ABSTRACT:
Diene rubbers are produced in the gas phase by first polymerizing the dienes or diene mixtures in the presence of a catalyst system, which is based on rare earth compounds, at temperatures of from 0 to 150.degree. C. and at pressures of from 1 mbar to 50 bar, so that a pourable diene rubber having a Mooney viscosity ML (1+4', 100.degree. C.) of 70 to 180 Mooney units is obtained, and subsequently subjecting the pourable diene rubber obtained to a chemical or thermal decomposition reaction until a Mooney viscosity of 10 to 70 Mooney units is obtained.

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