Bead size distribution in the suspension polymerization of vinyl

Details Bead size distribution in the suspension polymerization of vinyl Bead size distribution in the suspension polymerization of vinyl

1978-06-29

1979-10-09

Wong, Jr., Harry

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

525243, 526293, 526324, 526329, 526340, 526346, 5263471, C08F 1206, C08F 1208, C08F 1402

Patent

active

041706994

ABSTRACT:
The production of polymer beads by a suspension polymerization process in which a vinyl aromatic monomer having a free-radical generating catalyst dissolved therein is suspended in an aqueous medium with the aid of from 0.1 to 2.0 percent by weight, based on monomer, of a finely divided phosphate suspending agent in the presence of a modifier and heated to cause the monomer to polymerize into polymer beads is improved by the addition to the suspension of at least about 0.01 percent by weight based on monomer of an adjunct modifier, glutamic acid. Although the process of the invention is especially applicable in the preparation of large polymer beads, the glutamic acid also makes it possible to prepare the smaller polymer beads having narrow particle size distribution, also.

REFERENCES:
patent: 2673194 (1954-03-01), Grim
Fusey, Chem. Abs., 80, p. 6691z (1974).
Tsujimura et al., Chem. Abs., 81, p. 50501g (1974).

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