C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
C07F 9/6574 (2006.01) C08K 5/527 (2006.01)
Patent
CA 2177059
A bis(pentaerythritol phosphate alcohol) alkylphosphonate compound, such as one comprising an alkyl group of from about one to four carbon atoms, preferably bis(pentaerythritol phosphate alcohol) methylphosphonate, is a flame retardant compound. Such a compound can be prepared by the transesterification of a diphenyl alkyl phosphonate carrying the desired alkyl group with pentaerythritol phosphate alcohol. An alternative process of preparation comprises the reaction of pentaerythritol phosphate alcohol, a trialkylamine, and an alkylphosphonic dihalide.
L'invention se rapporte à un composé d'alkylphosphonate bis(pentaérythritol phosphate alcool), tel que celui comprenant un groupe alkyle possédant d'environ un à quatre atomes de carbone, de préférence le méthylphosphonate bis(pentaérythritol phosphate alcool), qui est un composé ignifuge. La préparation d'un tel composé consiste à transestérifier un phosphonate de diphényle alkyle portant le groupe alkyle souhaité avec un pentaérythritol phosphate alcool. Une variante du procédé de préparation consiste à faire réagir ensemble le pentaérythritol phosphate alcool, une trialkylamine ainsi qu'un dihalogénure alkylphosphonique.
Akzo Nobel N.v.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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