Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By gas forming or expanding
Patent
1990-09-13
1991-12-10
Foelak, Morton
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By gas forming or expanding
264 55, 521 79, 521 81, 521 88, 521147, C08J 914
Patent
active
050716069
ABSTRACT:
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.
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Rhoads Timothy W.
Tusim Martin H.
Foelak Morton
The Dow Chemical Company
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