Abstract:
A method of making flame retardant expandable polystyrene-based polymerized beads includes: mixing (a) about 70 to about 95 wt % of a styrene monomer, (b) about 1 to about 10 wt % of a char-generating thermoplastic resin, and (c) about 4 to about 29 wt % of inorganic foam particles to prepare a dispersion; and polymerizing the dispersion. The method of the present invention can eliminate further processing steps, can exhibit excellent productivity, and can allow easy control of the size of the beads.
Abstract:
The present invention relates to a foam polystyrene-based bead. The foam polystyrene-based bead includes: a core containing a styrene-based resin, a char-generating thermoplastic resin, and an expanded inorganic material; and a skin disposed on the surface of the core, wherein the skin contains a resin of which the glass transition temperature is below around 120° C. The foam is contained in the core or skin. The core may further include a carbon filler. Foam produced from the expandable polystyrene beads is not an inherently self-extinguishing flame retardant material yet can have good non-flammability comparable to or better than that of inherently flame retardant materials (Non flammability level 3) as measured in accordance with KS F ISO 5660-1, heat insulation properties, and mechanical properties.
Abstract translation:本发明涉及泡沫聚苯乙烯基珠粒。 基于泡沫聚苯乙烯的珠粒包括:含有苯乙烯基树脂,产生炭的热塑性树脂和膨胀的无机材料的芯; 以及设置在芯的表面上的皮肤,其中皮肤含有玻璃化转变温度低于约120℃的树脂。泡沫包含在芯或皮肤中。 芯可以进一步包括碳填料。 由可发泡聚苯乙烯珠生产的泡沫不是固有的自熄性阻燃材料,而且可以具有与根据KS F ISO 5660测量的固有阻燃材料(不可燃性等级3)相当或更好的非燃烧性 -1,隔热性能和机械性能。
Abstract:
A flame retardant foam polystyrene bead comprises: (A) a mixed resin including (a1) about 90 wt % to about 99 wt % of a styrene resin and (a2) about 1 wt % to about 10 wt % of a char-generating thermoplastic resin; (B) inorganic foam particles dispersed in the mixed resin; and (C) a foaming agent impregnated into the mixed resin containing the dispersed inorganic foam particles. The foam produced using the flame retardant foam polystyrene bead can have good flame retardancy, insulation, and mechanical strength properties.