Rosin pentaerythritol ester preparation improvement

Details Rosin pentaerythritol ester preparation improvement Rosin pentaerythritol ester preparation improvement

1984-12-10

1985-10-22

Cockeram, Herbert S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 97, 260 975, C09F 700, C09F 104

Patent

active

045487464

ABSTRACT:
Phosphinic acid (also called hypophosphorous acid), when used in very small quantities, is disclosed to act as a catalyst to accelerate the reaction rate of esterification of rosin with pentaerythritol. According to the process of the invention, a rosin is reacted with at least an equivalent amount of pentaerythritol in the presence of phosphinic acid at a temperature of from about 180.degree. C. to about 300.degree. C. When tall oil rosin is esterified by the invention process, a rosin ester is produced without appreciable color degradation.

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patent: 3780012 (1973-12-01), Smith
patent: 3780013 (1973-12-01), Smith
patent: 4172070 (1979-10-01), Scharrer et al.

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