Epoxy Resin, Method for Producing Same and Epoxy Resin Composition Thereof
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United States of America Patent
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N/A
Issued Date -
N/A
app pub date -
Jun 25, 2009
filing date -
Jun 17, 2004
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An epoxy resin represented by general formula (I), which satisfies numerical formula (1) mentioned below and comprises hydrolytic halogen of 0.05 wt. % or less, said epoxy resin being produced by the procedure as follows: after dissolving 0.8 to 1.3 mole of epihalohydrin to 1 mole of divalent phenol in a solvent, a pre-reaction is performed over 30 to 70 minutes by adding dropwise 0.25-0.35 mole of 30˜50% aqueous solution of alkali metal hydroxide over 30 to 70 minutes thereto, and thereafter, 0.65-0.75 mole of the remaining 30˜50% aqueous solution of alkali metal hydroxide is added dropwise over about 1 hour to complete the reaction over 1 to 3 hours.
First Claim
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