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

1977-12-27

1979-10-02

Lilling, Herbert J.

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

Synthetic resins

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

525242, 525292, 525305, 525306, 525265, 525316, 525304, 525308, 526204, 526211, 5262321, 5262321, 526233, 526340, 526346, 526909, 526910, C08F 1204, C08F 1208, C08F 1218, C08F27902

Patent

active

041698282

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, such as certain aminoalkanecarboxylic acids and N-substituted derivatives thereof. The process of the invention is especially applicable in the preparation of large polymer beads.

REFERENCES:
patent: 2380591 (1945-07-01), Fryling
patent: 3222340 (1965-12-01), Harris
patent: 3328374 (1967-06-01), Ronden et al.
patent: 3470146 (1969-09-01), Maclay
patent: 3649610 (1972-03-01), Wright
patent: 3755282 (1973-08-01), Wright
patent: 3786115 (1974-01-01), Osuga et al.
patent: 3994840 (1976-11-01), Kajimura et al.

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