Process for preparing polyester resins

Details Process for preparing polyester resins Process for preparing polyester resins

C - Chemistry, Metallurgy

08

G

402/252, 403/56,

C08G 59/42 (2006.01) C08G 63/00 (2006.01) C08G 63/20 (2006.01) C08G 63/42 (2006.01) C08G 63/58 (2006.01) C08J 9/04 (2006.01) C08J 9/06 (2006.01)

Patent

CA 1114994

ABSTRACT OF THE DISCLOSURE The invention provides a process for the production of a polyester which comprises initiating a reaction between a poly-terminal epoxide, a mono-terminal epoxide and a cyclic diacid anhydride in the presence of a catalytically effective quaternary salt heating to a point at which the reaction becomes a self-sustaining exothermic reaction and controlling the reaction such that the temperature of the mixture is not reduced until after the exothermic reaction has begun to subside.

268836

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