Expandable polymeric styrene particles
AssigneeCosden Technology, Inc.
InventorRichard A. Schwarz
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Abstract
An improved expandable polymeric styrene particle is provided containing a blowing agent and a minor amount of ethylene-bis-stearamide and dibromoethyldibromocyclohexane. The improved particle results in a significantly reduced final mold cooling cycle in producing the finished molded article. Ethylene-bis-stearamide and dibromoethyldibromocyclohexane can be incorporated during impregnation with the blowing agent or by blending with the expandable particles after impregnation.
Claims6
An expandable polymeric styrene particle having incorporated therein a blowing agent and a from about 0.1% to about 1.0% of ethylene-bis-stearamide and a from about 1% to about 1.5% of dibromoethyldibromocyclohexane, all percentages being based upon the weight of the polymeric styrene.
In a process for producing an expandable polymeric styrene particle wherein a polymeric styrene particle is impregnated with a blowing agent and the resultant expandable polymeric styrene particle recovered, the improvement which comprises impregnating the polymeric styrene particle with a from about 0.1% to about 1.0% of ethylene-bis-stearamide and a from about 1% to about 1.5% of dibromoethyldibromocyclohexane, all percentages being based upon the weight of the polymeric styrene during impregnation of said polymer with said blowing agent.
Dependencies are inferred from the claim text.