Suspension polymerization

Details Suspension polymerization Suspension polymerization

1977-06-23

1980-03-11

Michl, Paul R.

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

Synthetic resins

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

526 67, 526 70, C08F 220

Patent

active

041927974

ABSTRACT:
There is described an improved process for the discontinuous suspension polymerization of alkenyl-aromatic compounds, which comprises re-using the aqueous polymerization medium, after separation of the polymer beads, as the polymerization medium of a subsequent polymerization. Monomer-soluble and water-soluble initiators and, optionally fresh water and dispersing agent, are added. Re-using the aqueous polymerization medium does not negatively affect the color and mechanical properties of the polymer obtained. The process of the invention results in considerable saving of energy.

REFERENCES:
patent: 3488745 (1970-01-01), Wright
patent: 3935148 (1976-01-01), Childers et al.
patent: 4017670 (1977-04-01), Spicuzza, Jr. et al.
Zurnev et al., "Multiple Use of Waste Water in the Production of Bulk-Suspension High Impact Polystyrene", Plasticheskie Massy, No. 5, 1975, p. 51 (Translation: International Polymer Science and Technology, vol. 2, No. 12 (1975), pp. T/103-T/104).

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