ʻO ka lāʻau rosin
I ka manawa like, loaʻa iā ia nā hopena carboxyl e like me ka esterification, alcoholization, hoʻokumu paʻakai, decarboxylation, a me aminolysis.
Hoʻokumu ʻia ka hana hou ʻana o ka rosin i nā ʻano o ka rosin me nā paʻa pālua a me nā hui carboxyl, a ua hoʻololi ʻia ka rosin e hana i kahi moʻo rosin i hoʻololi ʻia, e hoʻomaikaʻi ai i ka waiwai hoʻohana o ka rosin.
Hoʻohana ʻia ʻo Rosin resin i ka ʻoihana adhesive e hoʻonui i ka viscosity, hoʻololi i ka stickiness adhesive, cohesive properties, etc.
ʻO Rosin resin kahi pūhui tricyclic diterpenoid, loaʻa i loko o nā kristal monoclinic flaky i loko o ka ethanol wai. ʻO ka helu hoʻoheheʻe he 172 ~ 175 ° C, a ʻo ka rotation optical he 102 ° (anhydrous ethanol). ʻAʻole hiki ke hoʻoheheʻe ʻia i loko o ka wai, hiki ke hoʻoheheʻe ʻia i ka ethanol, benzene, chloroform, ether, acetone, carbon disulfide a me ka hoʻoheheʻe ʻana o ka sodium hydroxide wai.
ʻO ia ka mea nui o ka resin rosin maoli. Hoʻohana ʻia nā Esters o nā ʻakika rosin (e like me nā methyl esters, vinyl alcohol esters, a me glycerides) i nā pena a me nā varnish, akā i loko o nā kopa, plastics, a me nā resins.
He polyol ester ia o ka waika rosin. ʻO nā polyols maʻamau ka glycerol a me ka pentaerythritol. ʻO ka polyol
ʻOi aku ka kiʻekiʻe o ka wahi palupalu o ka pentaerythritol rosin ester ma mua o ka glycerol rosin ester, a ʻoi aku ka maikaʻi o ka hoʻomaloʻo ʻana, ka paʻakikī, ka pale wai a me nā waiwai ʻē aʻe o ka varnish i hana ʻia me ka glycerol rosin ester.
Inā hoʻohana ʻia ka ester i hana ʻia mai ka rosin polymerized a i ʻole hydrogenated rosin ma ke ʻano he mea maka, ua hoʻemi ʻia ke ʻano o ka discoloration, a ua hoʻomaikaʻi ʻia nā waiwai ʻē aʻe i kekahi ʻano. ʻOi aku ka kiʻekiʻe o ka wahi palupalu o ka ester rosin polymerized ma mua o ka ester rosin, a ʻoi aku ka haʻahaʻa o ka wahi palupalu o ka hydrogenated rosin ester.
Hoʻomaʻemaʻe ʻia nā esters Rosin mai nā resins rosin. Hana ʻia ʻo Rosin resin e ka esterification o ka rosin. No ka laʻana, hana ʻia ka rosin glyceride i ka rosin e ka esterification o ka glycerol.
ʻO ka mea nui o ka resin resin he resin acid, ʻo ia ka hui ʻana o nā isomers me ka molecular formula C19H29 COOH; ʻO ka ester rosin e pili ana i ka huahana i loaʻa ma hope o ka esterification o ka resin resin, no ka mea, he mea ʻokoʻa ia, no laila ʻaʻole hiki ke ʻōlelo ʻia nona ka laulā. nui.
ʻO ka resin phenolic i hoʻololi ʻia ʻo Rosin ke ʻike nui ʻia e ka hana synthesis kuʻuna. ʻO ke kaʻina hana hoʻokahi ka hoʻohui ʻana i ka phenol, aldehyde a me nā mea maka ʻē aʻe me ka rosin a laila hana pololei.
He mea maʻalahi ke kaʻina hana, akā ʻoi aku ka kiʻekiʻe o nā koi mana e like me ka hoʻomehana ʻana ma hope; ʻO ke kaʻina hana ʻelua ʻo ka synthesize i ka phenolic condensate intermediate ma mua, a laila hana me ka ʻōnaehana rosin.
Hoʻokumu ʻia kēlā me kēia pae hoʻololi kikoʻī i ka resin me ka waiwai haʻahaʻa haʻahaʻa, kahi wahi palupalu kiʻekiʻe, a me ke kaumaha molecular like a me kahi solubility i nā mea hoʻoheheʻe ʻaila mineral.
1. Hoʻokahi-ʻanuʻu hana Reaction kumu:
â Ka hoʻohui ʻana o ka resin resole phenolic: Hoʻohui ʻia ka Alkylphenol i ka rosin hoʻoheheʻe ʻia, a aia ka paraformaldehyde i loko o ka ʻōnaehana ma ke ʻano granular, a laila decomposes i monomer formaldehyde, e hana ana i ka hopena polycondensation me ka alkylphenol.
ʻO ka hana ʻana o ka methine quinone: dehydration i ka wela kiʻekiʻe, i ke kaʻina o ka hoʻomehana ʻana, piʻi wikiwiki ka hana o ka methylol i loko o ka ʻōnaehana, hiki mai ka dehydration i loko o ka methylol mole, a me ka hopena etherification condensation ma waena o nā molekole methylol. Loaʻa nā ʻano condensates phenolic me nā degere like ʻole o ka polymerization.
⢠Hoʻohui i ka rosin i ka methine quinone a me ka maleic anhydride: E hoʻohui i ka maleic anhydride ma 180 °C, e hoʻohana i ka mea paʻa paʻa ʻole o ka maleic anhydride a me ka paʻa pālua i loko o ka waika rosin e hoʻohui, a i ka manawa like e hoʻohui i ka methine quinone i ka rosin. Loaʻa ka ʻakika i kahi pane hoʻohui Diels-Alder e hana i nā pūhui maleic anhydride chromofuran.
⣠Esterification o polyol: ʻO ka noho ʻana o nā pūʻulu carboxyl he nui i loko o ka ʻōnaehana e hoʻopau i ke koena o ka ʻōnaehana a kumu i ka paʻa ʻole o ka resin.
No laila, hoʻohui mākou i nā polyols a hoʻohana i ka hopena esterification ma waena o nā pūʻulu hydroxyl o polyols a me nā pūʻulu carboxyl i loko o ka ʻōnaehana e hōʻemi i ka waiwai waikawa o ka ʻōnaehana. I ka manawa like, ma o ka esterification o polyols, ua hoʻokumu ʻia nā polymers kiʻekiʻe i kūpono no ka offset printing inks.
2. ʻElua-ʻanuʻu kaʻina Reaction kumu:
â Ma lalo o ka hana a ka mea hoʻoheheʻe kūikawā, hoʻokumu ka formaldehyde i nā ʻano oligomers resole phenolic i loaʻa ka nui o ka methylol ikaika i loko o ka hopena o ka alkylphenol. No ka mea ʻaʻohe hopena pale o ka waika rosin, condensates me ka ʻoi aku o 5 phenolic structural units hiki ke synthesized.
ʻO ka polyol a me ka rosin ua esterified i ka wela kiʻekiʻe, a ma lalo o ka hana a ka catalyst kumu, hiki ke loaʻa koke ka waiwai waika i makemake ʻia.
⢠I loko o ka rosin polyol ester i hoʻopili ʻia, e hoʻohui mālie i ka resole phenolic resin dropwise, e hoʻomalu i ka helu hoʻohui dropwise a me ka mahana, a hoʻopau i ka hoʻohui dropwise. Dehydration i ka wela kiʻekiʻe, a ma hope ua hoʻokumu ʻia ka resin i makemake ʻia.
ʻO ka pōmaikaʻi o ke kaʻina hana hoʻokahi, ʻo ia ka lawe ʻia ʻana o ka ʻōpala ma ke ʻano o ka mahu, kahi maʻalahi e hana i ka mālama ʻana i ke kaiapuni. Eia nō naʻe, ʻo ka hopena condensation phenolic i hana ʻia i loko o ka rosin hoʻoheheʻe ʻia i nā ʻaoʻao he nui ma muli o ke kiʻekiʻe o ka hopena wela a me ka wehe ʻole ʻana.
He paʻakikī ka hoʻoponopono ʻana, a ʻaʻole maʻalahi ka loaʻa ʻana o nā huahana resin paʻa. ʻO ka pōmaikaʻi o ke ʻano ʻelua ʻanuʻu, ʻo ia ke kiʻi ʻana i kahi oligomer condensation phenolic me kahi ʻano paʻa paʻa a me ka haku mele, ʻoi aku ka maʻalahi o ka nānā ʻana i kēlā me kēia pae pane, a paʻa ka maikaʻi o ka huahana.
ʻO ka pōʻino, ʻo ka condensate phenolic pulp condensate maʻamau e pono e hoʻokaʻawale ʻia e ka waika a holoi ʻia me ka nui o ka wai e wehe i ka paʻakai ma mua o ka hiki ke hana me ka rosin, ka hopena i ka nui o ka wai ʻōpala i loko o ka phenol. ke kaiapuni a hoopau i ka manawa nui.
ʻO ka nīnau o ka pono a me ka hewa o nā kaʻina hana hoʻokahi a me ʻelua mau ʻanuʻu ua lōʻihi ka manaʻo o nā mea hana ink. Akā i kēia manawa, me ka hoʻomohala kūleʻa o ke ʻano holoi holoi ʻole no ka synthesizing condensate phenolic, ua paipai ikaika ʻia ka hoʻoponopono ʻana o ke ʻano hana synthesis ʻelua.
