Process for producing epoxy resins
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United States of America Patent
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-
Mar 20, 1984
Grant Date -
N/A
app pub date -
Feb 28, 1983
filing date -
Feb 28, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved process for reacting vicinal epoxides with phenols or thiophenols is described. This process is conducted at essentially anhydrous conditions and temperatures less than 175.degree. C. The resulting resins are generally more linear and less colored than advanced resins produced via prior art processes. Also the phosphonium catalyst remains active to promote subsequent advancement or curing reactions. The catalyst can be deactivated in a separate step to produce a resin of exceptional purity.
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