High performance epoxy resin modified by a polysulfide polymer derived from the heavy ends waste of chlorinated hydrocarbon production
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United States of America Patent
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Nov 14, 1995
Issued Date -
N/A
app pub date -
Nov 8, 1994
filing date -
Oct 26, 1994
priority date (Note) -
Expired
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Abstract
A process is disclosed for preparing a polysulfide-epoxy prepolymer and cured co-polymer using a heavy ends waste generated in chlorinated hydrocarbon production. The process comprises first distilling the heavy ends waste to form an enriched heavy ends waste with an ethylene dichloride content less than about 10% by weight. The enriched heavy ends waste is then reacted with an alkaline polysulfide within a temperature range of about 50.degree. C. to about 150.degree. C. to form a polysulfide polymer mixture. Next, between about 5 and about 300 parts of the polysulfide polymer mixture is co-reacted with a hundred parts by weight of an epoxy resin to form a polysulfide-epoxy prepolymer or a cured co-polymer if a curing agent is present.
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