I-rosin resin SOR 422 iyinhlaka ye-maleic acid, eyaziwa nangokuthi i-dehydrated maleic acid resin.Kuwukuqina kwe-granular okulungiselelwe ukusabela kwe-rosin ne-maleic acid eguquliwe ngokwengeza i-rosin ku-maleic acid anhydride kanye ne-esterification nge-glycerol noma i-pentaerythritol.