Polymer production

Details Polymer production Polymer production

1990-03-26

1992-06-02

Seccuro, Carman J.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525 52, 525 54, 525240, 525322, C08F 200, C08F29708

Patent

active

051187574

ABSTRACT:
In the gas phase, two stage process for the production of polypropylene impact copolymer, the fouling of the second stage recycle loop and the heat exchange unit incorporated therein is reduced by the addition to the substantially gaseous material passing through the loop of a small amount of alkylene compound selected from alkylene glycol compounds, alkylene glycol derivatives of alkylene diamines or ethers or esters thereof.

REFERENCES:
patent: 3962196 (1976-06-01), Weimer et al.
patent: 4551509 (1985-11-01), Takayuki et al.
patent: 4650841 (1987-03-01), Levresse et al.

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