Polyurethane (machira, zvinonamira, zvinonamira)
Hunyoro muPU system hunosangana neisocyanate, zvisinei nezvigadzirwa zvepolyurethane zvine chikamu chimwe chete kana zviviri, zvinogadzira amine necarbon dioxide, amine inoramba ichisangana neisocyanate, zvekuti kushandiswa kwayo kuburitsa gasi recarbon dioxide panguva imwe chete, kunoumba mabhuru pamusoro pefirimu repende, zvichikonzera kuora kana kutoita kuti firimu repende risashande zvakanaka.
2% ~ 5% ye molecular sefa (upfu) mu system yakakwana kubvisa hunyoro hwasara mu PU system, asi pakupedzisira zvinoenderana nehunyoro huri mu system.
Kuputira kunodzivirira ngura
Mu primer ine epoxy zinc yakawanda, mvura shoma inoburitsa mhinduro yakanaka neupfu hwezinc, inoburitsa hydrogen, inowedzera kumanikidzwa mubharero, inopfupisa hupenyu hwe primer, zvichikonzera kuomarara, kuramba kupfeka uye kuomarara kwefirimu rekuputira. Molecular sesefa (hupfu) se desiccant inonyudza mvura, iyo inonyudza muviri wese, inobvisa mvura uye isina kana reaction ne substrate. Saka molecular sesefa yakachengeteka uye iri nyore kune anti-corrosive coating system.
Kuputira upfu hwesimbi
Maitiro akafanana anogona kuitika muzvipfeko zvesimbi zveupfu, zvakaita sezvipfeko zvealuminium powder.
Zvigadzirwa zvine chekuita nazvo:JZ-AZ Molecular Sese