Rhodia Chimie

Jacques Richard

Christian Priou

Michel Dury

The invention concerns a novel method for preparing tetrakis(pentafluorophenyl)borate derivatives of general formula MB(C F ) , M being selected among Na , Li , or K , wherein: (a) a C F X solution, X being selected among H, Cl, Br or I, in anhydrous butylic ether is contacted with an alkyllithium, the mol ratio of C F X/alkyllithium being 1 to 1.1, and the alkyl radical, linear or branched comprising 1 to 10 carbon atoms; (b) the resulting product is contacted with previously non-dissolved BR , R, identical or different being selected among a chlorine atom, a fluorine atom, a bromine atom, an alkoxy radical comprising between 1 and 4 carbon atoms.

Process for the preparation of tetrakis (pentafluorophenyl) borate derivatives

Method for preparing tetrakis (pentafluorophenyl) borate derivatives

The invention concerns a novel method for preparing non-toxic resins crosslinkable under radiation in the presence of an initiator system. Said resins are prepared from compositions of an organic and/or silicon type comprising monomers, oligomers and/or polymers with organofunctional groups, and are cross-linked in the presence of an initiator system consisting of an onium salt with low toxicity whereof the cationic structure is &lsqb;(CH(CH,),&mdash;C,H,&mdash;)&mdash;I&mdash;(&mdash;R,)&rsqb;&plus;(I).

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Luzinay, France

Jacques Richard