Initiator suspension, their preparation and use

Details Initiator suspension, their preparation and use Initiator suspension, their preparation and use

1993-08-24

1995-04-04

Pal, Asok

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Organic compound containing

502 8, 502100, B01J 3508

Patent

active

054038049

ABSTRACT:
An initiator suspension for use in the suspension polymerization of ethylenically unsaturated monomers is prepared by (a) heating the initiator to its melting point; (b) finely dividing the initiator in water while it is in a molten state; and (c) rapidly cooling so that the initiator is in a molten state for a period of time which is less than about 5 minutes. The initiator suspension has very small particles and a narrow particle size distribution whereby at least 50% by weight of the particles are smaller than 5 .mu.m and at least 90% by weight of the particles are smaller than 10 .mu.m.

REFERENCES:
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patent: 3795630 (1974-03-01), Jaspers et al.
patent: 4092470 (1978-05-01), Oosterwijk et al.
patent: 4818425 (1989-04-01), Meijer
patent: 4950422 (1992-08-01), Torenbeck et al.
patent: 5270271 (1993-12-01), Lundin et al.
Verhelst et al., "The Production of PVC Using Peroxide Suspensions", Kunststoffe, (1980), 70(4), 224-8.
"Process for Preparing Granules of Organic Peroxides", Research Disclosure, May 1980, No. 193, p. 161, Disclosure No. 19302.

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