In
chemistry, epoxy or polyepoxide is a
thermosetting epoxide polymer that cures (polymerizes and crosslinks) when mixed with a
catalyzing agent or "hardener". Most common
epoxy resins are produced from a reaction between
epichlorohydrin and
bisphenol-A. The first commercial attempts to prepare
resins from epichlorohydrin occurred in
1927 in the
United States. Credit for the first synthesis of bisphenol-A based epoxy resins is shared by Dr. Pierre Castan of
Switzerland and Dr. S.O. Greenlee in the United States in
1936. Dr. Castan's work was licensed by
Ciba, Ltd. of Switzerland and Ciba went on to become one of the 3 major epoxy resin producers worldwide. The epoxy business of Ciba was spun-off and later sold in the late 1990s and is now the advanced materials business unit of
Huntsman Corporation of the United States. Dr. Greenlee's work was for the firm of Devoe-Reynolds of the United States. Devoe-Reynolds was a player in the early days of the epoxy resin industry, later selling its business to
Shell Chemical (now Hexion, formerly Resolution Polymers and others).
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