Method for rosin esterification

Details Method for rosin esterification Method for rosin esterification

C - Chemistry, Metallurgy

09

F

260/122

C09F 1/04 (2006.01)

Patent

CA 1274504

Case Docket No. CHR 85-20 IMPROVED METHOD FOR ROSIN ESTERIFICATION Abstract of the Invention The catalytic combination of phosphinic acid (also called hypophosphorous acid) and a phenol sulfide compound is disclosed to accelerate the reaction rate of esterification of rosin with a polyhydric alcohol, as well as provide product color improvements. According to the process of the invention, a rosin is reacted with up to a 50% equivalent excess of the polyhydric alcohol in the presence of phosphinic acid and a phenol sulfide compound at a temperature of from about 180°C to about 300°C.

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