Pamazuva ano, TDI kana MDI isosarudzwa kuti ave mainini zvinhu zvakashata zvePU zvigadzirwa, kungave kurapa mumiririri, zvakapfava, plu comming kana phino kana phino pendi. Howenver,kungave kweTDIorMDI,Benzene MhetemuTDI neMDIzvakananga kubatanidzaszvakasiyanaisocynestermapoka, uye iyo pi bond inobata pamwe chete neNCO. Pasi pesimba re light, kupisa, oxygen, kunyanya ultraviolet radiation, Izvoinogona kukonzera ammonia ester landter yekubatana kwechiitikouyeGadzira anamatic Amine, pane iyoBenzene nucleusinodzokorora mushureoxidation. Izvi zvinogona kuburitsa chromophoc mapoka ayo anokonzera yero pane yero pane yekupedzisira pu zvigadzirwa.Ziso revanhu rakanyatsoteerera kune ruvara, kazhinji ppm rakamisikidzwa remagetsi remafuta rinoendesa kuonekwa kwero zvigadzirwa.
Kugadzirisa dambudziko reyero, iyo yakakosha nzira ndeyekushandisa HDI kana IPDI panzvimbo yeTDI uye MDL seyakagadzirwa zvinhu pasina zvakananga kubatana pakati peBenzene ring uye NCO. Asi mutengo wezvinhu izvi zvishandiso zvine zvikanganiso zvakadaro: Mutengo unodhura, murombo makemikari kuramba, kuomarara hakuna kukwana .... Izvi zvinodzikisira zvikuru kusimudzira kweHDI kuPU.
Imwe mhinduro ndeyekuzadza iyo inert gasi mune maitiro ekugadzira uye kuchengetedza kuti azviparadzanise kusangana neokisijeni zvakanyanya sezvinobvira. Iyo inonyanya kushanda nzira ndeyekuwedzera antioxidant uyeUv absorber, iyo inogona kudzivirira nekudzivirira uye kunonoka kuitika kweiyo yero.
Yihoo hn130 is a amine anti-yellowing mumiririri. Iyo'shandiswaSenge gasi stabilizer mune yekugadzira maitiro, ine sarudzo yakanaka kune nitric oxide (kwete)uyenitrogen dioxide (No2),uyezvinobudirira kudzivirirayero yakakonzerwa negasi fumigating.
Yihoo hn130 inonyanya kushandiswa muPukuumbwa zvinhu, midziyo yetsoka, mapurasitiki, puresurethane fibers uye polyurethane marara, zvikuru kuendesa hupenyu hwebasa rechigadzirwas.
Unogamuchirwa kuti ubate isu kubvunza!
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Kutumira Nguva: Nov-22-2021