Rosin resin SOR 422 bụ resin maleic acid, nke a makwaara dị ka resin maleic acid kpọrọ nkụ.Ọ bụ granular siri ike kwadebere site na mmeghachi omume nke rosin na maleic acid gbanwere site na ịgbakwunye rosin na maleic acid anhydride na esterification na glycerol ma ọ bụ pentaerythritol.