The Dow Chemical Company

Timothy W Rhoads

Kyung W Suh

William Gerald Stobby

Takao Kadota

Martin H Tusim

A foamable composition comprising an alkenyl aromatic polymer, blowing agent and a transient foam control agent that is effective to reduce polymer melt viscosity in the melt phase but nonmiscible and nondetrimental to the solid polymer.

Polymeric composition comprising transient foam control agent

Novel, expandable polymeric blends comprising at least one vinylaromatic monomer-acylonitrile resinous material, an effective amount of at least one blowing agent, and from about 0.2 to about 1.0 percent by weight, based on the weight of resinous material, of an expansion aid consisting essentially of triethylene glycol. The triethylene glycol expansion aid unexpectedly reduces the amount of expansion agent required to expand the composition, particularly to low density products, without adversely affecting the final properties of the foamed product.

Plasticizers for expandable styrene-acrylonitrile resin

Styrenic foams are prepared with water as a blowing agent component and polyhydric alcohol as a corrosion inhibitor.

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Granville, OH, United States of America

Timothy W Rhoads