Ko nga phenol aukati me te tert-butyl (X = tert-butyl) me te methyl (R = methyl CH3) kei te tuunga-o te roopu roopu phenolic hydroxyl e aukati ana ka ngoikore te aukati o te roopu phenolic hydroxyl hei aukati, me te whakatere i te tere o te urupare antioxidant, na te mea ko te hanganga hou o te antioxidant hei painga ohorere. Ko tenei hanganga hou o te aukati phenol antioxidant e kiia ana ko te asymmetric hindered phenols antioxidant.
Ko te hangarite i aukati i te hanganga phenolic me te roopu tert-butyl me te roopu methyl kei te waahi-hydroxyl ortho-e tau ana hei tiaki i a ia ano. I aukatihia e te asymmetric te antioxidant phenolic, me te 2 - methyl - 6 - teriary butyl phenol hei angaiwi, ehara ko nga ahuatanga noa o te aukati i nga antioxidants phenolic, engari he ruruku hoki me te pumau o te poutupuru aukati me te aukati i te awe auri. Na te mea he nui ake te kitea o te mahi i te momo hangarite tuku iho o te phenol aukati, a he pai mo nga whakamahinga o te haukaha waiariki.
Ko te AN245, AN1790 (me AN2777) me te AO80 nga mea e toru e kore e hangai i te haukino hei pupuri i nga antioxidants phenols, kei roto ko te AN245 e tino whakamahia ana me te utu iti.
Ko te 245 e tino tika ana mo te whakamahi i te rauropi whakahirahira phenolic o nga polymers waro. Hei antioxidant, ka whakamahia i te tukatuka me te pumau o te waiariki tuuturu mo te wa roa mo te HIPS, MBS me ABS, nga kirihou hangarau penei i te POM me te PA me te polyurethane. Koinei hoki te whakamutu i te mekameka whai hua i roto i te mahinga polymerization a PVC. Ko tenei hua kaore he painga ki te urupare polymer, whakamahia mo te polystyrene whai mana nui, polyvinyl chloride, ka taea te taapiri ki te monomer i mua i te polymerization.
Hei taapiri ki te waahanga o te paura noa, ka taea e taatau te whakarato 35% o te marara-AN245DW. I muri i nga tau maha o te wheako whakangao, ko te wai marara i whakaputaina, i tukuna mai e ta maatau kamupene, ehara i te mea ngawari ki te whakatikatika, he ngawari ake te tohatoha atu i te paura, koinei te tino antioxidant e whakamahia ana i roto i te mahi polymerization PVC.
He maioha ki a koe ki te whakapiri mai ki a maatau mo nga paatai!
Imeera: yihoo@yihoopolymer.com
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Te wa tuku: Sep-13-2021