Tetramethoxymethyl glycoluril (TMMGU),TGIC Chemistries Sauyawa
Tetramethoxymethyl glycoluril (TMMGU),
TGIC Chemistries Sauyawa
Haɗin hydroxyl polyester / TMMGU, irin su powderlink 1174, wanda Cytec ya haɓaka, na iya ba da kyakkyawar dama don maye gurbin TGIC a cikin aikace-aikacen da ke buƙatar ginin fim na bakin ciki. Kamar yadda wannan hanyar warkarwa ta sinadarai ta kasance mai ɗaukar nauyi, wasu matsalolin aikace-aikacen da aka bayyana a cikin sashe na HAA curatives suma suna faruwa tare da wannan curative. Koyaya, kimantawa na baya-bayan nan da bayanai sun nuna cewa ana iya samun suturar ramin ramin kyauta tare da haɗin hydroxyl polyester / TMMGU koda lokacin da fim ɗin ya wuce mil 4.
Irin wannan nau'in sinadarai yana buƙatar mai haɓaka acid mai ƙarfi, kamar methyltolylsulfonamide (MTSI) ko cyclamic acid (CA). Abubuwan da ke haifar da acid suna da wasu kurakurai: adana dogon lokaci na electrostatic-catalyzed acid foda zai iya canza reactivity na irin waɗannan tsarin. Kuma ana iya shafar wasu abubuwan haɓaka acid, ko ma neutralized, ta asali pigments ko fillers, kamar calcium carbonate , sai dai idan wadannan inerts an pretreated ko mai rufi .
Yin amfani da magungunan acid na iya haifar da matsalolin masu samar da foda dangane da adadin kuzari da zabin filaye. Precatalyzed (na ciki catalyzed) resins sun zama samuwa na kasuwanci, suna ba da madadin ƙira tare da, da kuma sarrafa abubuwan da ke haifar da acid. Babban rashin lahani na resins da aka riga aka ƙaddara shi ne cewa ba sa ƙyale masu ƙira su daidaita maganin tsarin TMMGU.
Katange kuma ba'a toshe katangar acid masu haɓakawa suna aiki tare da nau'in sinadarai na TMMGU. Tunda tsarin TMMGU wanda ke dauke da katangar acid dole ne a cire katanga don zama mai aiki, su kwayoyin halittarally yana buƙatar yanayin gasa mafi girma ko kuma tsawon lokacin gasa fiye da nau'ikan da ke ɗauke da acid ɗin da ba a toshe. Acid ɗin da aka toshe suna da mafi kyawun kwanciyar hankali na ajiya da kuma mafi girman juriya ga kayan kwalliya na yau da kullun fiye da abubuwan da ba a toshe su ba, duk da haka. Haka kuma, aiki na baya-bayan nan tare da hana amine da aka toshe MTSI ya samar da foda wanda ke ginawa zuwa kauri na mil 4 zuwa 5 (100 zuwa 125 microns) ba tare da lahani ba. Amfanin acid ɗin da ba a toshe shi ba shine cewa suna ba da yanayin zafin jiki wanda yawanci ya fi na tsarin TGIC ko IPDI.
MTSI yana samar da kyakkyawan ƙarewa yayin da CA ke samar da samfura tare da jeri mai sheki tsakanin ƙanana da matsakaici ba tare da buƙatar wakilai ba. Za a iya samun fina-finan matattu ta ƙara ƙaramin adadin CA zuwa resin da aka rigaya.
Samfurin kwantar da hankali daga maganin polyester / TMMGU shine methanol, wanda ke haifar da wasu matsalolin muhalli, musamman ga masu amfani da kayan kwalliyar foda. An auna matakan warkewa na methanol a kusan kashi 1 zuwa 1.5 na jimlar nauyin ƙira. TMMGU kuma yana fitar da 300 zuwa 600 ppm na formaldehyde (akan daskararrun fenti) yayin magani. Wannan, duk da haka, ya kusan sau 20 ƙasa da adadin da melamine aminoplast curative ke samarwa a cikin sutura ta al'ada.
A gefen tabbatacce, tsarin TMMGU yana ba da damammakin samfura iri-iri daga jere daga mai sassauƙa sosai zuwa mai wuyar gaske, ba tare da izini ba. Gudun ruwa, daidaitawa, da kaddarorin yanayi sune kwayoyin halittarally yayi kyau sosai zuwa kyakkyawan .QUV bayanai daga foda da aka tsara tare da tsarin hydroxy polyester / TMMGU / MTSI mai tsabta ya nuna cewa irin waɗannan foda suna riƙe da fiye da 70 bisa dari na mai sheki bayan 1000hours na fallasa lokacin da aka tsara su ba tare da UV absorbers ba. Lokacin da aka tsara su tare da masu ɗaukar UV, foda suna riƙe da kashi 85 zuwa 90 na mai sheki. Wannan yana kwatanta da kyau tare da tsarin TGIC da IPDI. A cikin gwajin fallasa Florida, wasu tsarin TMMGU sun jure wa watanni 20 na yanayi ba tare da wani hasarar hasarar sheki ba.
Tetramethoxymethyl glycoluril (TMMGU)