Process for the manufacture of polymaleic anhydride

C - Chemistry – Metallurgy – 07 – D

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402/313, 260/362

C07D 307/60 (2006.01) C08F 22/06 (2006.01)

Patent

CA 1099275

ABSTRACT OF THE DISCLOSURE The invention relates to a process for making polymaleic anhydride by polymerising maleic anhydride in a solvent mixture of xylene, the ortho isomer content of which is up to 99%, and a non-reactive solvent having a boiling point of from 110° to 180°C. using di-tertiary butyl peroxide as catalyst.

281910

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