| 摘要 |
PURPOSE:To obtain the titled resin of high heat resistance, by incorporating phenolic resin (followed by reaction, if necessary) with aminomethyl phosphonic ester condensate prepared from monoalkanolamine, formaldehyde (derivative) and trialkylphosphite. CONSTITUTION:The objective resin can be obtained by incorporating ( I ) 5- 40wt% of aminomethyl phosphonic ester condensate prepared by virtually equimolar reaction at 40-100 deg.C between (A) monoalkanolamine of formula I (R1 is 2-4C alkylene group) (e.g. monoethanolamine, monoisopropanolamine), (B) formaldehyde or its derivative (e.g. paraformaldehyde) and (C) trialkylphosphite of formula II (R<2>, R<3> and R<4> are each 1-4C alkyl) (e.g. trimethyl phosphite) to eliminate equimolar or more amount of alcohol (II) either with the manufacturing of the final phenolic resin to perform reaction or (III) in a phenolic resin varnish.
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