| abstract |
A foamable composition comprises in admixture (a) a high molecular weight thermoplastic resin in particulate form and an effective amount of (b) a foaming agent therefor comprising a pumpable liquid dispersion comprising (i) a solid blowing agent, (ii) a liquid carrier, and, optionally, (iii) a thickener. The liquid dispersion can be pumped directly into the hopper of a foam molding machine eliminating the need to pre-mix pelletized concentrates of the solid blowing agent. |