Rosin resin SOR 422 is maleic acid resin, inozivikanwawo se dehydrated maleic acid resin.Iyo granular yakasimba yakagadzirwa nekuita kwe rosin uye maleic acid yakagadziridzwa nekuwedzera rosin kune maleic acid anhydride uye esterification ine glycerol kana pentaerythritol.