Polyisobutylene CAS 9003-27-4
Polyisobutylene (PIB, CAS 9003-27-4) ndi polima yodzaza ndi mzere wopezeka pogwiritsa ntchito cationic polymerization ya isobutylene monomer. Ndi yopanda poizoni, yopanda fungo, yokhazikika kwambiri, yopanda mpweya wambiri, yoteteza kwambiri, ndipo mawonekedwe ake amasintha kuchokera ku madzi okhuthala → theka-lolimba → rabara elastomer pamene kulemera kwa mamolekyulu kukukwera.
Yolimba kwambiri ku ukalamba ndi kukhazikika kwa mankhwala
Kuchuluka kwa unyolo wonse: kupirira kutentha, mpweya, ozoni, kuwala kwa ultraviolet, ma acid, alkali ndi mchere, sikuwonongeka kapena kusweka kwa nthawi yayitali.
Kukhazikika kwa kutentha: kungagwiritsidwe ntchito kwa nthawi yayitali pa -50℃ mpaka 150℃, ndi malo oyaka kwambiri komanso kuyaka pang'ono
Mpweya wochuluka + kutchinjiriza kwambiri + kulola mpweya kulowa pang'ono
Mpweya wolimba kwambiri: mphamvu zabwino kwambiri zotchinga madzi, gasi ndi nthunzi, kuposa rabara wamba
Kuteteza magetsi bwino: kukana kwambiri mphamvu zamagetsi, kutayika kochepa kwa dielectric, koyenera kutseka zingwe/magetsi
Kugwirizana kotetezeka komanso kopanda poizoni + kosiyanasiyana
Gulu la chakudya la FDA: lopanda poizoni, losakwiyitsa, lingagwiritsidwe ntchito mu kutafuna chingamu, zodzoladzola, ndi zinthu zina zopha mankhwala
Zimasakanikirana ndi ma hydrocarbons/labala/resin: zosavuta kusakaniza ndikusintha, zomwe zimapangitsa kuti kukhuthala, kusinthasintha komanso kukana nyengo kukhale bwino.
| Chinthu | Muyezo |
| Maonekedwe | Madzi omveka bwino, okhuthala |
| Mtundu, APHA | 40 |
| Mphamvu Yokoka Kwambiri @15.6 Deg C | 0.88-0.89 |
| Viscosity@100 Deg C, cSt | 200-260 |
| Malo owunikira (COC), Deg C (Min) | 190 |
| Mw(Avereji ya chiwerengero) | 900-1000 |
| Mtengo Wosalowerera (Max), mg wa KOH/g | 0.02 |
| Kuchuluka kwa Madzi (Max), ppm | 40 |
Kulemera kochepa kwa molekyulu PIB (Mw < 10,000, madzi okhuthala)
Mafuta odzola / zowonjezera mafuta: kukhuthala, kuletsa kuzizira, kuletsa kukalamba, kutseka ndi kupewa kutuluka kwa madzi
Zomatira/zomatira: zomatira zomwe zimakhudzidwa ndi kupanikizika, rabara yosinthidwa ya butyl, zomatira zosalowa madzi, zomatira pawindo la galimoto
Zodzoladzola / zinthu zokongoletsera: lipstick / lip balm (yonyowetsa popanda mafuta), kirimu (yotseka chinyezi ndikupanga filimu), m'malo mwa squalane
Chakudya: kutafuna chingamu (kuthandiza kutafuna bwino, kupewa kumatirira mano)
2) Kulemera kwapakati kwa molekyulu PIB (Mw 10,000 - 100,000, mphira wofewa pang'ono/wolimba)
Kusintha kwa rabara: acrylonitrile / chloroprene rabara pulasitiki, kumawonjezera kukana mafuta ndi kulimba kwa mpweya
Zingwe / mawaya: kuviika mu insulation, chidebe chosalowa madzi, chophimba cholimba
Zophimba / phula: chophimba choletsa dzimbiri, kusintha kwa phula (choletsa kusweka, choletsa kukalamba)
3) Kulemera kwakukulu kwa mamolekyulu PIB (Mw > 100,000, elastomer yofanana ndi rabara)
Rabala yapadera: tayala lamkati lopanda mpweya wambiri, gawo lotseka vacuum, gasket yoletsa kukalamba
Kusintha kwa pulasitiki: Kulimbitsa PP/PE, kukulitsa kukana kukhudzidwa ndi kukana nyengo
• Kulongedza Kwachizolowezi: 25 kg/thumba; 25 kg/ng'oma
• MOQ: iyenera kutsimikiziridwa ndi giredi ndi komwe ikupita
• Nthawi Yotsogolera: kutsimikiziridwa ndi kuchuluka kwa oda ndi ndandanda yopangira
• Kutumiza: njira zotumizira panyanja / ndege / zothamanga zikupezeka
• Sungani pamalo ozizira, ouma, komanso opatsa mpweya wabwino.
• Sungani chidebecho motseka bwino komanso motetezeka ku chinyezi.
• Pewani kuwala kwa dzuwa mwachindunji, kutentha, ndi moto wotseguka.
• Tsatirani malangizo a SDS pazinthu zosagwirizana.
