Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Manfred Doering0
Sebastian Seibold0
Uwe Storzer0
Berthold Just0
Holger Keller0
Date of Patent
May 31, 2011
Patent Application Number
11916435
Date Filed
December 12, 2006
Patent Primary Examiner
Patent abstract
The invention relates to a method for preparing halogen-free flameproof epoxy resins, in which a halogen-free epoxy resin is reacted with a polyfunctional aldehyde or ketone and a phosphinic acid derivative, wherein the phosphinic acid derivative contains at least one P—H-active structural unit of the formula ═PH(O) and is used in an amount equivalent to the polyfunctionality of the aldehyde or ketone, to a halogen-free flameproof epoxy resin obtainable by this method, to the use of the epoxy resin as a base material for the manufacture of printed circuit boards and printed circuits and to intermediates used to prepare the epoxy resins.
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