A process for making unimodal styrenic foam structure

Details A process for making unimodal styrenic foam structure A process for making unimodal styrenic foam structure

C - Chemistry, Metallurgy

08

J

C08J 9/12 (2006.01)

Patent

CA 2145297

Disclosed is a foamable styrenic polymer gel containing an aqueous blowing agent capable of forming a closed-cell, unimodal foam structure. The gel composes in admixture the flowable melt of a polymer composition having greater than 50 percent by weight of a styrenic polymer and a blowing agent having 1 percent or more by weight water based upon the total weight of the blowing agent. The styrenic polymer has a degree of water solubility sufficient to ensure formation of a unimodal foam structure instead of a bimodal foam structure. The unimodal cell size distribution provides desirable fabricability and machinability characteristics for the foam structure.

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