Chiyero 99%min 1,4-Phenylene diisocyanate CAS 104-49-4 p-phenylene diisocyanate (PPDI)

PPDI ndi yoyera 1,4-Phenylene diisocyanate (PPDI), nambala ya CAS ndi 104-49-4. PPDI ndi mankhwala ochiritsira apamwamba / ma chain extenders a polyurethane (PU) thermoplastic elastomers. Ma elastomers opangidwa ndi PPDI amawonetsedwa ndikuchita bwino kwambiri. Ubwino wodziwikiratu ndikuti mawilo othamanga kwambiri opangidwa ndi PPDI amatha kuyimira kutentha kwambiri pansi pakugwira ntchito mwachangu komanso mosalekeza. Chifukwa chake, mawilo opangidwa ndi PPDI ndi yankho labwino kwa omwe amafunikira moyo wautali, kukweza kwakukulu komanso kukana kutentha kwakukulu. Nthawi zambiri, ma elastomer a PU omwe amadziwika ndi ma abrasion abwino kwambiri, ong'ambika komanso odulidwa poyerekeza ndi ma rubber opangira. Ngakhale PPDI ndi MDI ali ndi mapangidwe ofanana, kuuma ndi modulus katundu poyerekeza TODI, isocyanate ali ndi otsika molar chiŵerengero cha polyol ndi polyol mu PPDI. Kwenikweni, ma elastomer amtundu wa PPDI ndi osinthika kuposa ma elastomer amtundu wa MDI ndi TODI-mtundu wa polyurethane elastomers. Pakati pa polyurethane elastomers, PPDI-based PPDI amadziwika ndi mawilo opanikizika kwambiri, mwachitsanzo matayala a forklift, magalimoto ndi ndege; odzigudubuza, mawilo a makina; odzigudubuza othamanga kwambiri ndi zina zotero. Mwachidule, elastomer yamtundu wa PPDI ndiye chisankho choyenera pakugwiritsa ntchito abrasion yotsika kwambiri komanso kutentha Kwambiri. Masiku ano, PPDI kuchiritsa wothandizila chimagwiritsidwa ntchito TPU-zogulitsa monga main unyolo extender, ndi ntchito kumapitiriza kukula, kuphatikizapo O-mphete, hayidiroliki zisindikizo, coupling nyenyezi ndi chophimba kusindikiza squeegee masamba.