Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Effecting a change in a polymerization process in response...
Patent
1987-12-28
1992-05-26
Smith, Edward J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Effecting a change in a polymerization process in response...
526 59, 526 88, 526339, C08F 414, C08F 1010
Patent
active
051169150
ABSTRACT:
A method is disclosed for controlling the polymerization process of olefinic hydrocarbons in an inert solvent which provides continuous control of Mooney viscosity and molecular weight distribution of the obtained polymer. In the disclosed method, means (4, 5) are included for measuring the temperature of a polymer solution in different parts of a reactor (1) provided with agitation (2), as well as means (6) for measuring the dynamic or kinematic viscosity of the polymer solution and means (7) for measuring the polymer concentration in the solution. A valve (8) mounted on the catalyst feed line controls the catalyst flow rate. A computer (9) is used to control the entire process by calculating the Mooney viscosity from the dynamic viscosity and polymer concentration and adjusting the process parameters as necessary to achieve a pre-set Mooney viscosity. The computer also is used to maintain a temperature difference between sections of the reactor and thus obtain a polymer with a desired molecular weight distribution.
REFERENCES:
patent: 3256262 (1966-06-01), Irvin
patent: 3433775 (1969-03-01), Ray et al.
Elbaum George J.
Mamedov Ulchar A. O.
Tokar Anatolyi E.
Collins David W.
Giprokautchuk
Golant Joseph H.
Sarjeant John A.
Smith Edward J.
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