Fire retardant fine particulate expandable styrene polymers

Details Fire retardant fine particulate expandable styrene polymers Fire retardant fine particulate expandable styrene polymers

1983-04-19

1983-11-29

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 53, 264DIG9, 264DIG15, 521 58, 521 90, 521146, 521907, C08J 920, C08J 922

Patent

active

044181566

ABSTRACT:
Fire retardant, expanded styrene polymer shaped objects are prepared by:
(a) mixing styrene monomer or a mixture thereof with at least one comonomer, an expanding agent and a fire retardant, organic halogen compound in a aqueous dispersion;
(b) adding to (a) either before or during polymerization from about 0.0001 to 0.1 percent by weight esters soluble in the organic phase of (a), these esters of aliphatic dicarboxylic acids and aliphatic epoxy alcohols having at least 11 carbon atoms;
(c) polymerizing the aqueous dispersion of (a) and (b) using radical forming initiators at a temperature of about 80.degree. to 130.degree. C.;
(d) separating bead polymers having diameters between about 0.4 and 3 mm;
(e) pre-foaming the beads;
(f) ageing the pre-foamed beads; and
(g) final forming the aged and pre-foamed beads in a pressure resistant mold.

REFERENCES:
patent: 3755209 (1973-08-01), Wintz et al.
patent: 4029614 (1977-06-01), Wintz et al.
patent: 4192922 (1980-03-01), Wintz et al.
patent: 4223244 (1980-10-01), Rigler et al.
patent: 4281036 (1981-07-01), Leithausen et al.
R. Wegler, "Polyaddition and Polmerization Products of Heterocyclic Monomers", (1963), pp. 447-450.

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