تفاعل #514079

معادلة التفاعل

rosin

pentaerythritol

→

rosin PE

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةThe temperature is next raised to between 270° C. and 275° C.
2. 2
   workup.ADDITIONA catalyst, namely, 0.25 part of p-touenesulfonic acid is then added to the reaction mixture
3. 3
   درجة الحرارةThe reaction temperature is maintained for a total of 11 hours at 275° C

الإجراء التجريبي

To a suitable reactor are introduced 500 parts of WW rosin which is then heated under nitrogen to 220° C. Thereafter, 67.5 parts of technical pentaerythritol (PE) are added. The temperature is next raised to between 270° C. and 275° C., and stirred for one hour, at which time the acid number is found to be equal to 103. A catalyst, namely, 0.25 part of p-touenesulfonic acid is then added to the reaction mixture. The reaction temperature is maintained for a total of 11 hours at 275° C. At the end of this period, esterification had been found to be substantially completed, producing a rosin/PE ester having an acid number equal to 13, an N color, and an 84° C. Ring and Ball softening point.

المصدر