Ose ari maviri emvura chena rosin uye hydrogenated rosin akagadziridzwa rosin yezvakasikwa rosin.
Rosin haisi musanganiswa mumwe chete, asi musanganiswa wemakemikari:
Rosin ine 80% yerosin anhydride uye rosin acid, inenge 5 kusvika 6% ye resin hydrocarbon, inenge 0.5% yemafuta anoputika uye kutsvaga zvinhu zvinovava.
Hydrogenated rosin:
Sezvo rosin iri nyore kupenya, uye resin hydrocarbon mune yayo molecular chimiro ine conjugated mbiri zvisungo, ine yakakwirira reactivity, kusagadzikana uye nyore oxidation. Kuti ivandudze kupikisa kwayo oxidation, hydrogenated rosin inogona kugadzirwa nekuita rosin nehydrogen pasi pekumanikidzwa catalyzed mamiriro.
Mvura yakachena rosin:
Mvura-chena rosin i polyol rosin ine ruvara rwakanyanya kujeka. Iyo inogadzirwa kubva kune yakacheneswa rosin seyakanyanya mbishi zvinhu kuburikidza nehydrogenation, esterification uye kudzikamisa. Iyo ine zvakanakira kuchena kwemvura, kuchembera kwakanaka uye kuenderana kwakanaka nezvinhu zvepolymer, izvo zvinogona kuzadzisa zvakakosha zveindasitiri yekunamatira.
Zvinogona kuonekwa kuti kugadzirira kwemvura yakachena rosin inoda kupinda nhanho yehydrogenation rosin, asi haina kugumira kune danho rehydrogenation, iyo yakanakisa yakanatswa chigadzirwa.
