Polyurea Corrosion Cov Khoom Ruaj Ruam

Kev tsim cov tshuaj tsuag polyurea elastomer thev naus laus zis tau ntsib peb theem: polyurethane, polyurethane urea thiab polyurea. Cov khoom siv A ntawm qhov peb saum toj no yuav tsum zoo ib yam. Lawv yog ob qho tib si uas muaj ntxhiab lossis aliphatic prepolymers thiab semi-prepolymers. Qhov sib txawv hauv cov tivthaiv R. R tivthaiv cov tshuaj txhaj tiv thaiv polyurethane muaj cov roj ua kom tiav nrog hydroxyl-terminated resin thiab hydroxyl-terminated chain extender, thiab muaj cov catalysts rau kev txhim kho kev ua haujlwm. Cov R feem ntawm cov tshuaj txau polyurethane urea tuaj yeem tsim ua cov hydroxyl-terminated resin, amino-terminated resin thiab amine chain extender, thiab feem ntau muaj cov catalysts rau kev txhim kho kev ua ub no. R tivthaiv ntawm cov tshuaj txhaj tiv thaiv polyurea yuav tsum muaj cov amino-txwv ua cob thiab cov saw txuas ntxiv yam tsis muaj hydroxyl thiab catalyst. Vim tias cov tshuaj tiv thaiv kev ua haujlwm ntawm cov amino-xaus sib txuas nrog isocyanate Cheebtsam yog qhov siab heev, cov tshuaj tiv thaiv tuaj yeem ua tiav sai ntawm chav sov lossis tsis kub tsis muaj catalyst, uas zoo kov yeej cov foaming ntawm polyurethane thiab polyurethane / urea elastomer vim muaj kev cuam tshuam ntawm ambient qhov kub thiab av noo nyob rau hauv kev tsim kho, ua rau muaj ntau yam khoom hauv lub zog poob qis. Kev tuag taus.

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