TGIC maye gurbin chemistries a cikin foda shafi-Hydroxyalkylamide (HAA)
Hydroxyalkylamide (HAA) TGIC Maye gurbin sunadarai
Kamar yadda makomar TGIC ba ta da tabbas, masana'antun suna neman wanda zai maye gurbinsa. HAA curatives kamar Primid XL-552, ci gaba da alamar kasuwanci ta Rohm da Haas, an gabatar da su. Babban koma baya ga irin waɗannan masu taurin shine, tunda tsarin maganin su shine yanayin daɗaɗɗa, fina-finai waɗanda ke gina kauri fiye da mil 2 zuwa 2.5 (50 zuwa 63 microns) na iya nuna fitar da iskar gas, filaye, da ƙarancin kwarara da daidaitawa. Wannan gaskiya ne musamman lokacin da ake amfani da waɗannan magunguna tare da polyesters na carboxy na al'ada da aka tsara don haɗin TGIC.
Sabbin ƙarni na polyesters carboxy, haɓaka ko haɓaka ta EMS, Hoechst Celanese, da Ruco, don amfani da Primid XL-552, suna rage yawancin waɗannan matsalolin, duk da haka.Bayanan da Hoechst Celanese ya kafa kwanan nan, alal misali, ya nuna cewa yanayin yanayin Primid. Ana inganta ta ta amfani da ƙasa da adadin stoichiometric na hardener. Ana iya samun sakamako iri ɗaya ta ƙara ƙaramin adadin katange isophorone diisocyanate (IPDI) zuwa cikakken tsarin stoichiometric Primid, wanda ke da kyau sosai.ralwasu daga cikin HAA. Bugu da ƙari, bayanan da aka tattara bayan fallasa sabon ƙarni na carboxyl polyester / HAA da tsarin gargajiya da na ci gaba na carboxyl polyester TGIC zuwa hasken rana na Florida na tsawon shekaru 2 sun nuna cewa waɗannan sinadarai suna daidai da yanayin. Kuma gwajin Florida da muka gudanar yana nuna cewa nau'ikan tsarin Primid masu launi suna nuna ƙarancin sauye-sauyen asara wanda tsarin TGIC na al'ada ke da irin launi da abun ciki mai filler.
Wasu nau'ikan nau'ikan nau'in surfactant na iya ba da damar fina-finai su gina har zuwa mil 3 (75 microns) ba tare da nuna fitar da gas ko wasu manyan matsalolin saman ba. Ana haɗuwa da mahadi na Diphenoxy tare da benzoin a cikin carboxy polyester HAA chemistries don mafi kyawun bayyanar fim da rage rawaya.
Wasu sabbin tsarin carboxy polyester / HAA na iya zama cikakke ko isassun warkewa a yanayin zafi ƙasa da 138C na mintuna 20, muddin ana amfani da cikakken ma'auni na resin stoichiometric zuwa hardener. Foda da aka ƙirƙira daga waɗannan tsarin suna da yuwuwar a matsayin sutura don abubuwan da ba na ƙarfe ba.
Hydroxyalkylamide (HAA)