ʻO nā Amines i ka hana ʻana o ka Polyurethane a me ke kuleana o nā Catalysts DABCO

He polymer versatile ka Polyurethane i hoʻohana ʻia i nā ʻano hana like ʻole, mai nā foam a me nā coatings a hiki i nā elastomers a me nā adhesives. Pili ka hana ʻana o ka polyurethane i kahi hopena kemika paʻakikī ma waena o nā polyols a me nā isocyanates, a he kuleana koʻikoʻi nā catalysts i ka hoʻokele pono ʻana i kēia hopena. Ma waena o nā ʻano catalysts like ʻole i hoʻohana ʻia, he mea nui loa nā catalysts i hoʻokumu ʻia i ka amine ma muli o ko lākou hiki ke hoʻolalelale i ka hopena a kāohi i nā waiwai o ka huahana hope loa.

ʻAmine i ka hana ʻana o ka polyurethane

He mau hui organik nā Amines i loaʻa mai ka ammonia a ua hōʻailona ʻia e ke alo o hoʻokahi a ʻoi aku paha mau hui alkyl a aryl paha i hoʻopili ʻia i kahi ʻātoma nitrogen. I loko o ke ʻano o ka hana polyurethane, hoʻohana ʻia nā mea hoʻouluulu amine e hoʻomaʻamaʻa i nā hopena urethane (polyol a me isocyanate) a me urea (wai a me isocyanate). Hiki ke hoʻokaʻawale nui ʻia kēia mau mea hoʻouluulu i nā amines tertiary a me nā polyols i hoʻokumu ʻia i ka amine.

1. Nā Amine Tertiary: ʻO kēia nā mea hoʻouluulu amine i hoʻohana nui ʻia i nā ʻano polyurethane. ʻO nā laʻana e komo pū me ka triethylenediamine (TEDA), dimethylcyclohexylamine (DMCHA), a me bis(dimethylaminoethyl) ether (BDMAEE). Hoʻonui kēia mau hui i nā wikiwiki o ka hopena, hoʻomaikaʻi i ka hoʻokumu ʻana o ka huʻa, a hoʻohuli i ke ʻano o ke kelepona o nā huʻa polyurethane.

2. Nā Polyols i hoʻokumu ʻia i ka Amine: ʻO kēia nā polyols i hana ʻia e ka amine e hana ma ke ʻano he polyol a he mea hoʻoulu. He mea pono loa lākou i ka hana ʻana i nā ʻōnaehana huʻa palupalu kahi e pono ai ka hoʻonui ʻana i ka reactivity.

 Mea Hoʻouluulu DABCO

ʻO DABCO, a i ʻole 1,4-diazabicyclo[2.2.2]octane, he mea hoʻouluulu amine tertiary kaulana i ka ʻoihana polyurethane. He mea kūpono loa ia i ka hoʻouluulu ʻana i nā hopena gelling (urethane formation) a me ka puhi ʻana (carbon dioxide formation). ʻO ke ʻano kū hoʻokahi o DABCO e hiki ai iā ia ke hoʻolaha i kahi hopena kaulike, e hōʻoiaʻiʻo ana i nā waiwai huʻa kūpono e like me ka density, ka nui o ke kelepona, a me ka ikaika mechanical.

POLYCAT 15a meDABCO T

1. POLYCAT 15: He mea hoʻouluulu amine kūpono loa kēia i hoʻolālā ʻia no ka hoʻohana ʻana i nā noi huʻa polyurethane. Hāʻawi ia i ka hana catalytic maikaʻi loa, e paipai ana i nā wikiwiki o ka pane ʻana a me nā waiwai huʻa i hoʻomaikaʻi ʻia. He kūpono loa ʻo POLYCAT 15 i nā ʻōnaehana huʻa paʻa a maʻalahi hoʻi, e hāʻawi ana i nā ʻano hana i hoʻonui ʻia a me ka hana hopena maikaʻi loa.

2. DABCO T: ʻO kēia mea hoʻouluulu kekahi ʻano ʻē aʻe o ka ʻohana DABCO, i hana kūikawā ʻia no nā noi polyurethane kikoʻī. Ua kaulana ʻo DABCO T no kāna hana catalytic ikaika a me kona hiki ke hāʻawi i ka hana mau a hilinaʻi hoʻi i nā ʻano huʻa like ʻole. Hoʻohana nui ʻia ia i nā ʻōnaehana huʻa maʻalahi a paʻa hoʻi, e hāʻawi ana i ka mana hoʻomaikaʻi ma luna o nā waiwai kino o ka huʻa.

 Hopena

ʻO nā Amines, ʻoi aku ka tertiary amines e like me DABCO, he kuleana koʻikoʻi i ke kaʻina hana polyurethane. He mea nui nā mea hoʻouluulu e like me POLYCAT 15 a me DABCO T no ka hoʻokō ʻana i nā helu hopena i makemake ʻia a me nā waiwai huʻa, e hōʻoiaʻiʻo ana i nā huahana polyurethane kiʻekiʻe. Ma ka hoʻomaopopo ʻana a me ka hoʻohana pono ʻana i kēia mau mea hoʻouluulu, hiki i nā mea hana ke hoʻomaikaʻi i kā lākou mau kaʻina hana a hoʻonui i ka hana o kā lākou noi polyurethane.