Synthesis of alkyl-substituted thiodiphenols

C - Chemistry – Metallurgy – 07 – C

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260/616.7

C07C 149/36 (1985.01)

Patent

CA 1215396

Mo-2485 PC-072 SYNTHESIS OF ALKYL-SUBSTITUTED THIODIPHENOLS ABSTRACT OF THE DISCLOSURE A high yield of pure bis(4-hydroxy-dialkyl- phenyl) sulfide is obtained upon a process comprising reacting the corresponding dialkylphenol with a thionyl halide, distilling off the reaction solvent, and re- crystallization, said sulfides are suitable as comonomers in preparing polycarbonate resins of improved flame retardance. Mo-2485

453860

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