PURPOSE: To obtain the title resin of high polymerization degree, soluble to organic solvents, having both high thermal decomposition temperature and glass transition point, by reaction between a specific N-silyl aromatic diamine and aromatic difluoride in the presence of a fluoride catalyst in an aprotic organic solvent.
CONSTITUTION: The objective resin of formula II (n is 10W100) can be obtained by reaction, in the presence of a fluoride catalyst in an aprotic organic solvent, between (A) an N-silyl aromatic diamine of formula I [Ar1 is divalent residue of 5W16C (alkyl-substituted) aromatic hydrocarbon, and contains one or two aromatic rings which may contain N-atom.; R1WR6 are each 1W12C-alkyl, cycloalkyl, aryl or arylalkyl] (this can be prepared by reaction between the corresponding aromatic diamine and trimethyl chlorosilane in the presence of a tertiary amine such as triethylamine) and (B) an aromatic difluoride of formula X-Ar2-X (Ar2 is 4,4'-sulfonyl diphenylene, etc.; X is halogen).
KAKIMOTO MASAAKI
OISHI YOSHIYUKI
MUNIRACHINA PADOMANABAN
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