Editing Styrofoam (section)

== History ==
In the 1940s, researchers, originally at [[Dow Inc.|Dow]]'s Chemical Physics Lab, led by [[Ray McIntire]], found a way to make foamed [[polystyrene]]. They rediscovered a method first used by [[Sweden|Swedish]] inventor [[Carl Georg Munters]], and obtained an exclusive license to Munters's [[patent]] in the United States.<ref>{{cite book
 | last = Boundy
 | first = Ray H.
 |author2=Amos, J. Lawrence
 | title = A History of the Dow Chemical Physics Lab
 | publisher = Marcel Dekker, Inc.
 | year = 1991
 | location = New York
 | pages = 117–128
 | isbn = 0-8247-8097-3}}</ref> Dow found ways to adapt Munters's method to make large quantities of [[extruded]] polystyrene as a closed cell foam that resists moisture. The patent on this adaptation was filed in 1947.<ref>{{cite patent |country=US |number=2450436 |status= |title=Manufacture of cellular thermoplastic products |pubdate=1948-10-05 |gdate=1948-10-05 |fdate=1947-07-26 |pridate= |inventor=Otis Ray McIntire |invent1= |invent2= |assign1= |assign2= |class= |url=}}</ref>