I-rosin resin SOR 422 i-resin maleic acid, eyaziwa ngokuba yi-resin maleic acid dehydrated.Yinto eqinileyo yegranular elungiselelwe ukusabela kwe-rosin kunye ne-maleic acid eguqulwe ngokudibanisa i-rosin kwi-maleic acid anhydride kunye ne-esterification nge-glycerol okanye i-pentaerythritol.