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Rosin resin Sor jerin - Sor 422
Rosin resin sor 422 shine resin acid na namiji, wanda kuma aka sani da narkar da maleic acid namiji resin. It is a granular solid prepared by reaction of rosin and maleic acid modified by adding rosin to maleic acid anhydride and esterification with glycerol or pentaerythritol.
