He pūhui maha ngā whakamahinga o te polyurethane, e whakamahia ana i roto i ngā momo mahi, mai i ngā pahuka me ngā paninga ki ngā elastomers me ngā piripiri. Ko te hanga polyurethane he tauhohenga matū matatini i waenga i ngā polyol me ngā isocyanates, ā, he mea nui te mahi a ngā whakakorikori ki te whakahaere i tēnei tauhohenga kia whai hua. I roto i ngā momo whakakorikori rerekē e whakamahia ana, he mea tino nui ngā whakakorikori e ahu mai ana i te amine nā te mea ka taea e rātou te whakatere i te tauhohenga me te whakahaere i ngā āhuatanga o te hua whakamutunga.
Ngā Amine i roto i te Hanga Polyurethane
Ko ngā amine he matū waro i ahu mai i te haukini, ā, e tohuhia ana e te aroaro o tētahi, neke atu rānei o ngā rōpū alkyl, aryl rānei e piri ana ki tētahi ngota hauota. I roto i te horopaki o te hanga polyurethane, ka whakamahia ngā whakakorikori amine hei whakahaere i ngā tauhohenga urethane (polyol me te isocyanate) me te urea (wai me te isocyanate). Ka taea te whakarōpū whānui i ēnei whakakorikori ki ngā amine tuatoru me ngā polyol e hangai ana ki te amine.
1. Ngā Amine Tuatoru: Koinei ngā whakakorikori amine e whakamahia whānuitia ana i roto i ngā hanganga polyurethane. Hei tauira, ko te triethylenediamine (TEDA), te dimethylcyclohexylamine (DMCHA), me te bis(dimethylaminoethyl) ether (BDMAEE). Ka whakarei ake ēnei matū i ngā tere tauhohenga, ka whakapai ake i te hanganga pahuka, ā, ka awe i te hanganga pūtau o ngā pahuka polyurethane.
2. Ngā Polyol e Hangai Ana ki te Amine: He polyol whai mahi amine ēnei e mahi ana hei polyol me hei whakakorikori. He tino whai hua ēnei mō te hanga pūnaha pahuka ngāwari e hiahiatia ana te kaha ake o te tauhohenga.
Kaikōkiri DABCO
Ko te DABCO, 1,4-diazabicyclo[2.2.2]octane rānei, he whakakorikori amine tuatoru rongonui i roto i te umanga polyurethane. He tino whai hua ki te whakakorikori i ngā tauhohenga whakakorikori (te hanganga urethane) me te pupuhi (te hanganga hauhā waro). Mā te hanganga ahurei o te DABCO ka taea e ia te whakatairanga i tētahi tauhohenga taurite, e whakarite ana i ngā āhuatanga pahuka tino pai pērā i te mātotoru, te rahi o te pūtau, me te kaha ā-ringa.
1. POLYCAT 15: He matū whakakorikori tino whai hua tēnei i hangaia mō te whakamahi i roto i ngā tono pahuka polyurethane. He tino pai te mahi whakakorikori, e whakatairanga ana i ngā tere tauhohenga tere ake me ngā āhuatanga pahuka kua whakapaitia. He tino whai hua te POLYCAT 15 i roto i ngā pūnaha pahuka ngāwari me te pakari, e whakarato ana i ngā āhuatanga tukatuka whakarei ake me te mahi hua mutunga pai ake.
2. DABCO T: Ko tēnei whakakorikori he momo kē atu o te whānau DABCO, he mea hanga motuhake mō ngā tono polyurethane motuhake. E mōhiotia ana a DABCO T mō tōna kaha whakakorikori me tōna kaha ki te whakarato i te mahi pumau me te pono i roto i ngā momo hanganga pahuka. E whakamahia whānuitia ana i roto i ngā pūnaha pahuka ngāwari me ngā pūnaha pahuka pakari, e tuku ana i te mana whakahaere pai ake i runga i ngā āhuatanga ā-tinana o te pahuka.
Whakamutunga
He mea nui ngā amine, inā koa ngā amine tuatoru pērā i te DABCO, i roto i te tukanga whakaputa polyurethane. He mea nui ngā matū whakakorikori pērā i te POLYCAT 15 me te DABCO T hei whakatutuki i ngā tere tauhohenga me ngā āhuatanga pahuka e hiahiatia ana, kia pai ai te kounga o ngā hua polyurethane. Mā te mārama me te whakamahi pai i ēnei matū whakakorikori, ka taea e ngā kaihanga te arotau i ā rātou tukanga whakaputa me te whakarei ake i te mahi o ā rātou tono polyurethane.
Wā tuku: Pipiri-24-2024