Styrene-butadiene (SB) latex ndi mtundu wamba wa emulsion polima womwe umagwiritsidwa ntchito m'mafakitale ambiri ndi malonda.Chifukwa imapangidwa ndi mitundu iwiri yosiyana ya ma monomers, styrene ndi butadiene, SB latex imayikidwa ngati copolymer.Styrene imachokera ku benzene ndi ethylene, ndipo butadiene ndi mankhwala opangidwa ndi ethylene.
Styrene-butadiene latex imasiyana ndi ma monomers ake onse komanso ku latex yachilengedwe, yomwe imapangidwa kuchokera kumitengo ya Hevea brasiliensis (mitengo ya rabara).Zimasiyananso ndi mphira wina wopangidwa, styrene-butadiene rabara (SBR), yomwe ili ndi dzina lofanana koma imapereka zida zosiyana.
Kupanga kwa Styrene-Butadiene Latex
Styrene-butadiene latex imapangidwa kudzera munjira ya polima emulsion.Izi zimaphatikizapo kuwonjezera ma monomers m'madzi pamodzi ndi ma surfactants, oyambitsa, ma carboxylic acid ndi ma monomer apadera.Oyambitsa amayambitsa polymerization ya chain-reaction yomwe imalumikizana ndi styrene monomer kupita ku butadiene monoma.Butadiene palokha ndi mgwirizano wamagulu awiri a vinilu, kotero imatha kuchitapo kanthu ndi mayunitsi ena anayi a monomer.Zotsatira zake, imatha kukulitsa kukula kwa unyolo wa polima koma imathanso kulumikiza unyolo wa polima wina ndi mnzake.Izi zimatchedwa crosslinking, ndipo ndizofunikira kwambiri ku chemistry ya styrene-butadiene.Gawo lophatikizika la polima silisungunuka muzosungunulira zoyenera koma limafufuma ndikupanga matrix ngati gel.Ma polima ambiri amalonda a styrene-butadiene amaphatikizika kwambiri, motero amakhala ndi ma gel ochulukirapo, chinthu chovuta kwambiri chomwe chimakhudza kwambiri magwiridwe antchito a latex, kulola kulimba, mphamvu, ndi kukhazikika kuposa zida zina.Chotsatira, tiwona momwe zinthuzi zingagwiritsire ntchito bwino m'mafakitale angapo ndi ntchito.
Zogwiritsa Ntchito Zamalonda
Styrene-butadiene latex imapereka maubwino angapo, kuphatikiza kuvomereza kudzaza ndi kukhazikika kwamphamvu / kutalika.Kusinthasintha kwa copolymer iyi kumapangitsa kuti pakhale kusakanikirana kosawerengeka komwe kumapangitsa kuti madzi asasunthike komanso kumamatira ku magawo ovuta.Makhalidwe awa a SB latex amapangitsa kupanga izi kukhala kofunikira ku gulu lomwe likuchulukirachulukira la misika.Ma SB latex formulations amagwiritsidwa ntchito ngati zokutira muzinthu zamapepala, monga magazini, zowulutsira ndi catalogs, kuti akwaniritse gloss yapamwamba, kusindikiza bwino, komanso kukana mafuta ndi madzi.SB latex imawonjezera mphamvu yomangirira ya pigment ndipo imapangitsanso pepala kukhala losalala, lolimba, lowala komanso losagwira madzi.Monga bonasi yowonjezera, SB latex ndiyotsika mtengo kuposa zokutira zina.SB latex ndi chisankho chodziwika bwino cha zomatira m'mafakitale ena monga pansi.Mwachitsanzo, polima imapezeka ngati zokutira kumbuyo kwa nsalu ngati makapeti a tufted.Kuphimba kumbuyo kumapereka kukana kwa madzi ndikusunga ma tufts m'malo mwake, zomwe zimapangitsa kuti zikhale zokhazikika komanso zimachepetsa kuphulika m'mphepete.Izi ndi zina mwazogwiritsa ntchito styrene-butadiene latex.M'malo mwake, imapereka mwayi wopandamalire, monga zikuwonekera ndi momwe imagwirira ntchito poyendetsa njanji, zokutira nsalu, zomatira zovutirapo, ndi nsalu zopanda nsalu.Ma emulsions a styrene butadiene polymer nawonso ndi gawo lofunikira mu nembanemba zogwiritsidwa ntchito zamadzimadzi, komanso zokutira zotchinga za MVTR zotsekera chakudya.
Nthawi yotumiza: Aug-10-2022