ʻO nā phenol i kāohi ʻia me ka tert-butyl (X = tert-butyl) a me ka methyl (R = methyl CH3) ma ke kūlana o ka mea i keʻakeʻa ʻia i ka hui phenolic hydroxyl hiki ke hoʻonāwaliwali i ka stag hricance o ka hui phenolic hydroxyl hui i kekahi kekelē, a hoʻonui i ka wikiwiki o ka hopena antioxidant, no laila ke hana nei i ke ʻano hou o antioxidant i kahi hopena i manaʻo ʻole ʻia. ʻO kēia hanana hou o nā phenol antioxidant hindered i kapa ʻia ʻo asymmetric hindered phenols antioxidant.
ʻO kahi asymmetric ka mea i keʻakeʻa i ka hanana phenolic me kahi hui tert-butyl a me kahi hui methyl ma ke kūlana hydroxyl ortho i lawa e pale iā ia iho. ʻO ka asymmetric ka mea i keʻakeʻa i ka antioxidant phenolic phenolic, me 2 - methyl - 6 - tertiary butyl phenol e like me ka iwi iwi, ʻaʻole wale i nā ʻano laulā o nā hindolic phenolic hindered, akā hoʻohui pū ʻia me ke kūpaʻa antioxidant kōkua a me ke kūpaʻa ʻana i ka hopena shading. No laila ua ʻoi aku ka maikaʻi o ka hana ma mua o ke ʻano symmetrical o phenol hindered, a kūpono no nā noi hoʻoheheʻe wela.
AN245, AN1790 (a me AN2777) a me AO80 ʻo ia nā mea like ʻole ʻekolu asymmetric hindered phenol antioxidants, ma waena o AN245 ka mea e hoʻohana ākea ʻia me ke kumu kūʻai haʻahaʻa.
AN 245 kūpono kūpono no ka stereoobstructing phenolic antioxidants o nā polymers organik. Ma ke ʻano he antioxidant, hoʻohana ʻia ia i ka hana a me ka hoʻomaʻemaʻe kūlohelohe lōʻihi o nā polymers styrene e like me HIPS, MBS a me ABS, nā ʻenehana ʻenekini e like me POM a me PA a me polyurethane. He terminator kaulahao kūpono ia i ka hana polymerization PVC. ʻAʻohe hopena o kēia huahana i ka hopena polymer, hoʻohana ʻia no polystyrene hopena kiʻekiʻe, polyvinyl chloride, hiki ke hoʻohui ʻia i ka monomer ma mua o ka polymerization.
Ma waho aʻe o ke kūlana hoʻolako o ka pauka maʻamau, hiki iā mākou ke hāʻawi i ka ʻike 35% o ka dispersion-AN245DW. Ma hope o nā makahiki he nui o ka hana ʻana, ʻaʻole maʻalahi ka hoʻopuehu wai i hana ʻia a hoʻolako ʻia e kā mākou ʻoihana, a ʻoi aku ka maʻalahi o ka hoʻopuehu ʻana ma mua o ka pauka, ʻo ia ka antioxidant nui i hoʻohana ʻia i ka hana polymerization PVC.
Hoʻokipa ʻia ʻoe e kāhea iā mākou no nā nīnau!
Leka uila: yihoo@yihoopolymer.com
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Ka manawa Post: Sep-13-2021