Tetramethoxymethyl glycoluril (TMMGU), TGIC Hoʻololi Kemika

Tetramethoxymethyl glycoluril (TMMGU),

Nā Kemika Hoʻololi TGIC

Hiki i nā hui hydroxyl polyester/TMMGU, e like me powderlink 1174, i hoʻomohala ʻia e Cytec, hiki ke hāʻawi i kahi manawa kūpono e hoʻololi ai i ka TGIC i nā noi e koi ana i nā kiʻiʻoniʻoni ʻoi aku ka lahilahi. No ka mea, ʻo ka ʻōnaehana hoʻōla o kēia kemika he hopena condensation, hiki pū kekahi o nā pilikia noi i hōʻike ʻia ma ka pauku ma ka HAA curatives me kēia curative. Eia naʻe, hōʻike ʻia nā loiloi hou a me nā ʻikepili e hiki ke loaʻa nā pani puka ʻole me nā hui hydroxyl polyester / TMMGU ʻoiai ke kūkulu ʻia ke kiʻiʻoniʻoni ma mua o 4 mils. 

Pono kēia ʻano kemika i kahi mea hoʻoheheʻe waika ikaika, e like me methyltolylsulfonimide (MTSI) a i ʻole cyclamic acid (CA). Loaʻa i nā mea hoʻoheheʻe waika kekahi mau hemahema: mālama lōʻihi o ka electrostatic acid-catalyzed ka uhi lepo hiki ke hoʻololi i ka hana ʻana o ia ʻōnaehana. A hiki ke hoʻopili ʻia kekahi mau mea hoʻoheheʻe waika, a i ʻole neutrali hoʻohana ʻia, e nā puaʻa kumu a i ʻole nā ​​mea hoʻopihapiha, e like me ka calcium carbonate, ke ʻole kēia mau inerts i mālama mua ʻia a i uhi ʻia paha.

Hiki i ka hoʻohana ʻana i nā catalysts acid ke kumu i nā pilikia o nā mea hoʻoponopono pauka e pili ana i ka dosage catalyst a me ke koho ʻana i nā mea hoʻopihapiha. Ua loaʻa nā resins precatalyzed (internally catalyzed) ma ke kūʻai aku, hāʻawi i kahi ʻokoʻa i ka hoʻokumu ʻana me ka, a me ka lawelawe ʻana i nā, acid catalysts. ʻO ka pōʻino nui loa o nā resins precatalyzed ʻaʻole lākou e ʻae i nā formulators e hoʻololi i ka mālama ʻana i nā ʻōnaehana TMMGU. 

Hoʻohana ʻia nā catalyts acid i hoʻopaʻa ʻia a wehe ʻole ʻia me nā kemika ʻano TMMGU. No ka mea, ʻo nā ʻōnaehana TMMGU e loaʻa ana i nā ʻakika i hoʻopaʻa ʻia e wehe i mea e lilo ai i mea ikaika, ʻo lākou ke generalPono e ʻoi aku ka kiʻekiʻe o ka mahana o ka bake a i ʻole ka lōʻihi o ka manawa kuke ʻana ma mua o nā formula i loaʻa i nā waikawa unblocked. ʻOi aku ka maikaʻi o ka mālama ʻana i nā ʻakika i hoʻopaʻa ʻia a ʻoi aku ka maikaʻi o ka hoʻomanawanui no nā puaʻa kumu a me nā mea hoʻopihapiha ma mua o nā ʻakika i wehe ʻole ʻia. Eia kekahi, ʻo ka hana hou me ka amine nonyllowing i hoʻopaʻa ʻia ʻo MTSI i hana i ka pauka e kūkulu ʻia i ka mānoanoa o 4 a 5 mils (100 a 125 microns) me ka ʻole o nā hemahema ʻike ʻia. ʻO ka maikaʻi o nā waikawa unblocked ʻo ia ka hāʻawi ʻana i nā mahana hoʻōla i haʻahaʻa ma mua o nā ʻōnaehana TGIC a i ʻole IPDI.

Hoʻopuka ʻo MTSI i nā mea hoʻonani kiʻekiʻe aʻo CA e hana i nā huahana me nā pae ʻālohilohi ma waena o ka haʻahaʻa a me ka waena me ka ʻole o ka pono o nā mea hoʻopalapala. Hiki ke loaʻa nā kiʻiʻoniʻoni make-flat ma ka hoʻohui ʻana i nā helu liʻiliʻi o CA i ka resin precatalyzed.

ʻO ka huahana condensation mai ka hopena polyester/TMMGU he methanol, kahi e hoʻāla ai i kekahi mau manaʻo pili i ke kaiapuni, ʻoi aku hoʻi no nā mea noiʻi pauka. Ua ana ʻia nā pae haʻahaʻa hoʻōla no ka methanol ma kahi o 1 a 1.5 pākēneka o ka nui o ke kaupaona ʻana. Hoʻokuʻu pū ʻo TMMGU i 300 a 600 ppm o ka formaldehyde (ma nā mea paʻa pena) i ka wā o ka hoʻōla. ʻO kēia, akā naʻe, ʻoi aku ka liʻiliʻi o 20 mau manawa ma mua o ka nui o ka melamine aminoplast curative e hana ai i ka uhi maʻamau.

Ma ka ʻaoʻao maikaʻi, hāʻawi ka ʻōnaehana TMMGU i nā ʻano huahana like ʻole mai ka maʻalahi loa a hiki i ka paʻakikī loa, ka uhi ʻole ʻole. He gene nā waiwai kahe, hoʻolālikelike, a me ka ʻilirally maikaʻi loa i ka maikaʻi loa .QUV ʻikepili mai nā pauka i hoʻokumu ʻia me nā ʻōnaehana hydroxy polyester/TMMGU /MTSI e hōʻike ana e mālama ʻia kēlā mau pauka ma mua o 70 pakeneka o ka ʻālohilohi ma hope o 1000 mau hola o ka hoʻolaha ʻana i ka wā i hoʻokumu ʻia ai me ka ʻole o nā mea hoʻoheheʻe UV. Ke hoʻokumu ʻia me nā mea hoʻoheheʻe UV, mālama nā pauka i ka 85 a 90 ka nui o ka nani. Hoʻohālikelike kēia me nā ʻōnaehana TGIC a me IPDI. Ma ka ho'āʻo hōʻike ʻana ma Florida, ua kū kekahi mau ʻōnaehana TMMGU i 20 mau mahina o ka hoʻoilo ʻana me ka ʻole o ka nalowale ʻana o ka ʻōlinolino.

Tetramethoxymethyl glycoluril (TMMGU)