{"id":3483,"date":"2021-01-18T03:24:12","date_gmt":"2021-01-18T03:24:12","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=3483"},"modified":"2026-04-28T10:41:48","modified_gmt":"2026-04-28T10:41:48","slug":"properties-and-synthetic-routes-of-allantoin","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/hu\/properties-and-synthetic-routes-of-allantoin\/","title":{"rendered":"Az allantoin \u00e9s sz\u00e1rmaz\u00e9kainak tulajdons\u00e1gai \u00e9s szintetikus \u00fatjai"},"content":{"rendered":"<h4 class=\"wp-block-heading\">Sz\u00e9les k\u00f6r\u0171 alkalmaz\u00e1sa miatt a kereslet a <strong><a href=\"https:\/\/longchangchemical.com\/hu\/product\/allantoin-cas-97-59-6\/\" target=\"_blank\" rel=\"noreferrer noopener\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">allantoin<\/span><\/a><\/strong> \u00e9vr\u0151l \u00e9vre n\u00f6vekszik . Az allantoin k\u00e9miai szint\u00e9zis\u00e9nek m\u00f3dszere az 1940-es \u00e9vekben jelent meg k\u00fclf\u00f6ld\u00f6n. De csak az 1970-es \u00e9vek v\u00e9g\u00e9n \u00e9s az 1980-as \u00e9vek elej\u00e9n Jap\u00e1nban \u00e9s Nyugat-N\u00e9metorsz\u00e1gban vezett\u00e9k be az ipari termel\u00e9sbe. A hazai allantoinszint\u00e9zis fejleszt\u00e9se viszonylag k\u00e9s\u0151n kezd\u0151d\u00f6tt, a kutat\u00e1s \u00e9s fejleszt\u00e9s az 1970-es \u00e9vek v\u00e9g\u00e9n kezd\u0151d\u00f6tt. Jelenleg csak n\u00e9h\u00e1ny hazai v\u00e1llalat \u00e9rt el k\u00eds\u00e9rleti vagy t\u00f6meggy\u00e1rt\u00e1st . Mivel kev\u00e9s gy\u00e1rt\u00f3 van, a piac rendk\u00edv\u00fcl sz\u0171k\u00f6s. Az allantoin k\u00fcl\u00f6nleges fizikai \u00e9s k\u00e9miai tulajdons\u00e1gai miatt az allantoin-sz\u00e1rmaz\u00e9kok sokf\u00e9l\u00e9k \u00e9s sz\u00e9les k\u00f6rben haszn\u00e1latosak. Napjainkig az allantoin \u00e9s sz\u00e1rmaz\u00e9kai m\u00e9g mindig tov\u00e1bb k\u00fcldik a fejl\u0151d\u00e9st.<\/h4>\n\n<!-- lc-qa-start -->\n<p><strong>Quick answer:<\/strong> A practical additive decision starts with the exact defect: foam, poor wetting, craters, haze, or instability. The best product is usually the one that solves that defect with the safest compatibility window.<\/p>\n<!-- lc-qa-end -->\n\n\n\n\n\n\n<h4 class=\"wp-block-heading\"><strong><a href=\"https:\/\/longchangchemical.com\/hu\/product\/allantoin-cas-97-59-6\/\" target=\"_blank\" rel=\"noreferrer noopener\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">Allantoin<\/span><\/a><\/strong>, k\u00e9miai neve 1-urea-m-diazoc\u00e9n - [2,4]; Acetaldehid Tetraaza ciklopentadi\u00e9n; (2,5-dioxoc\u00e9n-4-m-diazopentil) karbamid; 5-urea hidantoin stb. Az imidazol heterociklusos vegy\u00fcletek k\u00f6z\u00e9 tartozik, molekul\u00e1ris k\u00e9plete C<sub>4<\/sub>H<sub>6<\/sub>N<sub>4<\/sub>O<sub>3<\/sub>molekulat\u00f6mege 158,12 g\/mol. Az allantoin krist\u00e1ly vagy krist\u00e1lyos por, amelynek sz\u00edne sz\u00edntelen \u00e9s feh\u00e9r k\u00f6z\u00f6tt van, \u00e9s szagtalan \u00e9s \u00edztelen. Az allantoin olvad\u00e1spontja 220 ~ 238 \u2103. Az allantoin v\u00edzben, alkoholban, \u00e9terben \u00e9s kloroformban nem old\u00f3dik, forr\u00f3 v\u00edzben, h\u00edg etanolban \u00e9s propan-triolokban old\u00f3dik. A tel\u00edtett vizes oldat (0,6%) enyh\u00e9n savas volt, pH =. 6. A vizes oldatban a pH = 4-9, stabil marad, \u00e9s egy nem vizes old\u00f3szer \u00e9s sz\u00e1r\u00edt\u00f3 leveg\u0151n stabil , m\u00e9g a 80 ~ 90 \u2103 30 perc alatt h\u0151 alatt is v\u00e1ltozatlan maradt.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">De nem b\u00edrja a magas h\u0151m\u00e9rs\u00e9kletet (100 \u2103 felett), az er\u0151s b\u00e1zist, vagy a hossz\u00fa ideig tart\u00f3 forral\u00e1st \u00e9s a napf\u00e9nyt. Az allantoin izomerekkel rendelkezik, \u00e9s a szerkezeti k\u00e9plet a k\u00f6vetkez\u0151:<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"694\" height=\"168\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/1-1.png\" alt=\"\" class=\"wp-image-3484\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/1-1.png 694w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/1-1-300x73.png 300w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/1-1-600x145.png 600w\" sizes=\"(max-width: 694px) 100vw, 694px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Az alkoholkonjug\u00e1lt rendszer az oka a savas csoportok kialakul\u00e1s\u00e1nak, \u00e9s stabiliz\u00e1lhatja a molekul\u00e1kat. Az OH<sup>&#8211;<\/sup>&nbsp;egyesek azt gondolhatj\u00e1k, hogy az allantoin egy bin\u00e1ris savas vegy\u00fclet. \u00c1ltal\u00e1noss\u00e1gban azonban a C(4)-en l\u00e9v\u0151 hidrog\u00e9nnek nagyon alacsony az aktivit\u00e1sa \u00e9s gyenge a disszoci\u00e1ci\u00f3s \u00e1lland\u00f3ja. A sz\u00e9n (2) hely\u00e9n l\u00e9v\u0151 sav er\u0151sebb, \u00e9s a disszoci\u00e1ci\u00f3s \u00e1lland\u00f3ja 1,17 \u00d7 10<sup>-9<\/sup>. Ez\u00e9rt a s\u00f3knak csak egyetlen sorozata, savas s\u00f3k vagy b\u00e1zikus s\u00f3k k\u00e9pz\u0151dhetnek. Ez\u00e9rt az allantoin monob\u00e1zisos sav-b\u00e1zis amfoter vegy\u00fclet. L\u00e9tezhet alkoholos \u00e9s ketonos forma is. Mint amfoter vegy\u00fclet, az allantoin nemcsak b\u00e1zikus vegy\u00fclet, hanem gyenge sav is, \u00e9s a savas s\u00f3vegy\u00fcletekhez gyenge b\u00e1zis is. Ez\u00e9rt az allantoin sz\u00e1mos anyaggal k\u00e9pes f\u00e9ms\u00f3kat \u00e9s adduktokat k\u00e9pezni. Ezek a f\u00e9ms\u00f3k \u00e9s adduktok nem csak mag\u00e1nak az allantoinnak a tulajdons\u00e1gait tartj\u00e1k meg, hanem nem vesz\u00edtik el a hozz\u00e1adott anyagok inherens tulajdons\u00e1gait sem. A k\u00f6vetkez\u0151kben p\u00e9ldak\u00e9nt felsoroljuk az allantoin alum\u00edniumvegy\u00fcletek n\u00e9h\u00e1ny fizikai \u00e9s k\u00e9miai tulajdons\u00e1g\u00e1t.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Az allantoin alum\u00edniumvegy\u00fcletek a b\u0151rbetegs\u00e9gek kezel\u00e9s\u00e9ben hat\u00e9kony funkci\u00f3k sz\u00e9les sk\u00e1l\u00e1j\u00e1t biztos\u00edtj\u00e1k. Mivel az alum\u00edniumion \u00e9s az allantoin ide\u00e1lis tulajdons\u00e1gainak konvergenci\u00e1ja teljes m\u00e9rt\u00e9kben egyes\u00fcl. Az allantoin jelenl\u00e9te jav\u00edtja az alum\u00edniums\u00f3 hat\u00e1s\u00e1t, \u00e9s megsz\u00fcnteti az alum\u00edniums\u00f3-allergi\u00e1ban szenved\u0151 egyes betegek irrit\u00e1ci\u00f3j\u00e1t. \u00c1llatk\u00eds\u00e9rletek azt is kimutatt\u00e1k, hogy az allantoin alum\u00ednium s\u00f3 nem volt irrit\u00e1ci\u00f3 \u00e9s allergia. Sz\u00e1mos gyakori form\u00e1ja a k\u00f6vetkez\u0151:<\/h4>\n\n\n\n<h3 class=\"wp-block-heading\">1. Alum\u00ednium-dihidroxi allantoin\u00e1t<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Az alum\u00ednium-dihidroxiallantoin\u00e1t molekul\u00e1ris k\u00e9plete Al(OH)<sub>2<\/sub>C<sub>4<\/sub>H<sub>5<\/sub>N<sub>4<\/sub>O<sub>3<\/sub>. Feh\u00e9r por, v\u00edzben \u00e9s m\u00e1s old\u00f3szerekben, p\u00e9ld\u00e1ul etanolban, \u00e9terben \u00e9s kloroformban nem old\u00f3dik. Nemzetk\u00f6zi kereskedelmi neve \"aldioxa\".Az alum\u00ednium-dihidroxi allantoin\u00e1t \u00f6sszet\u00e9tele a k\u00f6vetkez\u0151: alum\u00ednium-oxid (22,0 \u00b1 5)%, allantoin (55,0 \u00b1 5)%, pH-\u00e9rt\u00e9ke (4% szuszpenzi\u00f3) 6-5,8.<\/h4>\n\n\n\n<h3 class=\"wp-block-heading\">2. Alum\u00ednium kl\u00f3rhidroxi-allantoin\u00e1t proril\u00e9nglikol<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Az alum\u00ednium-dihidroxiallantoin\u00e1t molekul\u00e1ris k\u00e9plete [Al<sub>2<\/sub>(OH)<sub>4<\/sub>ClC<sub>4<\/sub>H<sub>5<\/sub>N<sub>4<\/sub>O<sub>3<\/sub>]C<sub>3<\/sub>H<sub>8<\/sub>O<sub>2<\/sub>. Ez egy feh\u00e9r por, molekul\u00e1ris \u00e1llapotban vagy m\u00f3dos\u00edtott form\u00e1ban, \u00e9s dezodork\u00e9nt, nedves\u00edt\u0151szerk\u00e9nt \u00e9s b\u0151r\u00f6sszeh\u00faz\u00f3 szerk\u00e9nt haszn\u00e1lj\u00e1k.<\/h4>\n\n\n\n<h3 class=\"wp-block-heading\">3. Alum\u00ednium-kl\u00f3r-droxi allantoin\u00e1t<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Az alum\u00ednium-kl\u00f3r-hidroxi allantoin\u00e1t k\u00e9plete: Al<sub>2<\/sub>(OH)<sub>4<\/sub>ClC<sub>4<\/sub>H<sub>5<\/sub>N<sub>4<\/sub>O<sub>3<\/sub>. Az alum\u00ednium-kl\u00f3r-hidroxi allantoin\u00e1t tiszta feh\u00e9r por, v\u00edzben old\u00f3dik, etanolban enyh\u00e9n old\u00f3dik, \u00e9terben \u00e9s kl\u00f3rut\u00e1nzatban nem old\u00f3dik. Az alum\u00ednium-kl\u00f3r-hidroxi allantoin\u00e1t nemzetk\u00f6zi kereskedelmi neve \"alcloxa\".Az \u00f6sszet\u00e9tel a k\u00f6vetkez\u0151: Alum\u00ednium-oxid (28,0 \u00b1 3)%, allantoin (40,0 \u00b1 3)%, kl\u00f3r (9,5 \u00b1 1,5)%, nitrog\u00e9n (14,2 \u00b1 1,5)%.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Ugyanakkor a m\u00f3dos\u00edtott kl\u00f3r-alum\u00ednium-allantoin \u00f6sszet\u00e9tele a k\u00f6vetkez\u0151 : Alum\u00ednium-oxid (45,61 \u00b1 2,0)%, allantoin (1,25 \u00b1 0,3)%, kl\u00f3r (15,60 \u00b1 1,5). Az alum\u00ednium-kl\u00f3r-hidroxi allantoin\u00e1t 10% oldat\u00e1nak pH-\u00e9rt\u00e9ke k\u00f6r\u00fclbel\u00fcl 4,3 .<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Az irodalmi jelent\u00e9sek szerint az allantoin f\u0151 szintetikus m\u00f3dszerei a k\u00f6vetkez\u0151k:<\/h4>\n\n\n\n<h3 class=\"wp-block-heading\">1. H\u00fagysav reakci\u00f3ja k\u00e1lium-permangan\u00e1ttal<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">A h\u00fagysavat \u00e9s a k\u00e1lium-permangan\u00e1tot l\u00fagos k\u00f6zegben oxid\u00e1lj\u00e1k, \u00e9s a term\u00e9keket ecetsavval dekarboxil\u00e1lj\u00e1k. Az oxid\u00e1l\u00f3szerek lehetnek \u00f3lom-dioxid, k\u00e1lium-ferricyanid, oxig\u00e9n, \u00f3zon, mang\u00e1n-dioxid, hidrog\u00e9n-peroxid stb. is. A reakci\u00f3 folyamata a k\u00f6vetkez\u0151:<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">El\u0151sz\u00f6r is, oxid\u00e1ci\u00f3s reakci\u00f3. A h\u00fagysav \u00e9s a k\u00e1lium-permangan\u00e1t reakci\u00f3ba l\u00e9p.<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"525\" height=\"174\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/2-1.png\" alt=\"\" class=\"wp-image-3485\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/2-1.png 525w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/2-1-300x99.png 300w\" sizes=\"(max-width: 525px) 100vw, 525px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Ezut\u00e1n dekarboxil\u00e1ci\u00f3s gy\u0171r\u0171nyit\u00e1si reakci\u00f3val kapjuk a v\u00e9gterm\u00e9ket.<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"778\" height=\"159\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/3-1.png\" alt=\"\" class=\"wp-image-3486\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/3-1.png 778w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/3-1-300x61.png 300w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/3-1-768x157.png 768w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/3-1-600x123.png 600w\" sizes=\"(max-width: 778px) 100vw, 778px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Ez a legkor\u00e1bbi elj\u00e1r\u00e1s, amely a nyersanyaghi\u00e1ny, a magas \u00e1r, a nagy mennyis\u00e9g\u0171 berendez\u00e9s \u00e9s a magas k\u00f6lts\u00e9gek miatt csak kis t\u00e9teles gy\u00e1rt\u00e1sra korl\u00e1toz\u00f3dik.<\/h4>\n\n\n\n<h3 class=\"wp-block-heading\">2. L\u00edtium-ur\u00e1t elektrolitikus oxid\u00e1ci\u00f3ja<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Az allantoint glikolsav \u00e9s karbamid elektromos \u00e1ram alatt t\u00f6rt\u00e9n\u0151 kondenz\u00e1ci\u00f3j\u00e1val szintetiz\u00e1lt\u00e1k.<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"425\" height=\"133\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/4-1.png\" alt=\"\" class=\"wp-image-3487\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/4-1.png 425w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/12\/4-1-300x94.png 300w\" sizes=\"(max-width: 425px) 100vw, 425px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">B\u00e1r ennek a m\u00f3dszernek a hozama valamivel magasabb, mint a h\u00fagysav-oxid\u00e1ci\u00f3s m\u00f3dszer\u00e9, a fenti probl\u00e9m\u00e1kkal is k\u00fczd, \u00e9s kev\u00e9sb\u00e9 alkalmazhat\u00f3 iparilag.<\/h4>\n\n\n\n<h3 class=\"wp-block-heading\">3. Ox\u00e1lsav elektrolitikus oxid\u00e1ci\u00f3ja<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Ez egy \u00faj, az elm\u00falt \u00e9vekben kifejlesztett elj\u00e1r\u00e1s, \u00e9s ez a gy\u00e1rt\u00f3sor K\u00edn\u00e1ban j\u00f6tt l\u00e9tre. A nyersanyagok k\u00f6nnyen beszerezhet\u0151k, de az energiafogyaszt\u00e1s nagy. A szakirodalom szerint az elj\u00e1r\u00e1s nem kiforrott, \u00e9s fejleszt\u00e9sre szorul.<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"651\" height=\"199\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/1.png\" alt=\"\" class=\"wp-image-3976\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/1.png 651w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/1-300x92.png 300w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/1-600x183.png 600w\" sizes=\"(max-width: 651px) 100vw, 651px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">4. A gliox\u00e1l oxid\u00e1ci\u00f3ja<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Mivel a gliox\u00e1l r\u00e9szleges oxid\u00e1ci\u00f3j\u00e1val el\u0151\u00e1ll\u00edthat\u00f3 a glioxilsav, \u00e9s az elj\u00e1r\u00e1s k\u00f6r\u00fclm\u00e9nyei enyh\u00e9k, ezt a szintetikus utat gyakran haszn\u00e1lj\u00e1k az iparban. Ez a m\u00f3dszer azonban sal\u00e9tromsavat haszn\u00e1l az oxid\u00e1ci\u00f3hoz, ami s\u00falyos k\u00f6rnyezetszennyez\u00e9st okoz.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">El\u0151sz\u00f6r a glikoxal r\u00e9szleges oxid\u00e1ci\u00f3ja glikoxilsav el\u0151\u00e1ll\u00edt\u00e1s\u00e1hoz.<\/h4>\n\n\n\n<h2 class=\"wp-block-heading\"><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"552\" height=\"60\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/2.png\" alt=\"\" class=\"wp-image-3977\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/2.png 552w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/2-300x33.png 300w\" sizes=\"(max-width: 552px) 100vw, 552px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">K\u00e9t mell\u00e9kreakci\u00f3t ad az al\u00e1bbiakban, \u00edgy a glikolsav el\u0151\u00e1ll\u00edt\u00e1s\u00e1nak ezen m\u00f3dja kb. 83%.<\/h4>\n\n\n\n<h2 class=\"wp-block-heading\"><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"462\" height=\"131\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/3.png\" alt=\"\" class=\"wp-image-3978\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/3.png 462w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/3-300x85.png 300w\" sizes=\"(max-width: 462px) 100vw, 462px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Ezut\u00e1n az allantoin szint\u00e9zise glikoxilsav \u00e9s karbamid kondenz\u00e1ci\u00f3j\u00e1val, meleg\u00edt\u00e9s \u00e9s savas k\u00f6r\u00fclm\u00e9nyek k\u00f6z\u00f6tt.<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"656\" height=\"145\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/4.png\" alt=\"\" class=\"wp-image-3979\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/4.png 656w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/4-300x66.png 300w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/4-600x133.png 600w\" sizes=\"(max-width: 656px) 100vw, 656px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">A glikolsav ilyen m\u00f3don t\u00f6rt\u00e9n\u0151 \u00e1talakul\u00e1sa 52% \uff5e 58%. Az \u00f6sszes reakci\u00f3 szerint, a gliox\u00e1lra sz\u00e1molva, az allantoin hozam 38% - 40% az elm\u00e9leti \u00e9rt\u00e9kb\u0151l.<\/h4>\n\n\n\n<h3 class=\"wp-block-heading\">5. Karbamid reakci\u00f3ja dikl\u00f3recetsavval<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">2 mol karbamid \u00e9s 1 mol dikl\u00f3r-ecetsav hev\u00edt\u00e9s\u00e9vel \u00e1ll\u00edtj\u00e1k el\u0151. A reakci\u00f3 folyamata a k\u00f6vetkez\u0151:<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"689\" height=\"270\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/5.png\" alt=\"\" class=\"wp-image-3980\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/5.png 689w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/5-300x118.png 300w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/5-600x235.png 600w\" sizes=\"(max-width: 689px) 100vw, 689px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Az 1930-as \u00e9vekben egy amerikai szabadalom arr\u00f3l sz\u00e1molt be, hogy az allantoin etil\u00e9nglikolban 120 \u2103-on 4 \u00f3r\u00e1n kereszt\u00fcl el\u0151\u00e1ll\u00edthat\u00f3, de a hozam alacsony volt. Az allantoin-p-dikl\u00f3recetsav teljes hozama el\u00e9rheti a 30,3%-t. N\u00e9h\u00e1ny k\u00ednai kutat\u00f3 tanulm\u00e1nyozta az elj\u00e1r\u00e1st, \u00e9s az allantoin \u00f6sszhozama meghaladta a 40%-t. A teljes rutin a k\u00f6vetkez\u0151.<\/h4>\n\n\n\n<h2 class=\"wp-block-heading\"><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"638\" height=\"221\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/6.png\" alt=\"\" class=\"wp-image-3981\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/6.png 638w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/6-300x104.png 300w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/01\/6-600x208.png 600w\" sizes=\"(max-width: 638px) 100vw, 638px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Jelenleg a technol\u00f3giafejleszt\u00e9s \u00e9s a kutat\u00e1s m\u00e1s m\u00f3dszerei is nagyon akt\u00edvak, \u00e9s megpr\u00f3b\u00e1lnak alacsonyabb k\u00f6lts\u00e9ggel sikereket el\u00e9rni, mint p\u00e9ld\u00e1ul az acetil\u00e9n m\u00f3dszer, a sz\u00e9n-dioxid, a sz\u00e9n-monoxid \u00e9s m\u00e1s, magas tartalm\u00fa hullad\u00e9kg\u00e1z-hasznos\u00edt\u00e1si m\u00f3dszerek. Eddig azonban m\u00e9g nem ker\u00fclt sor a termel\u00e9sbe val\u00f3 bevezet\u00e9sre. Fontos ipari term\u00e9kk\u00e9nt az allantoin tov\u00e1bbi szintetikus kutat\u00e1sokat ig\u00e9nyel.<\/h4>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"block-b4c0eeaf-7d48-4b9c-9bec-7357c3ccc6ad\"><strong><a href=\"https:\/\/longchangchemical.com\/hu\/product\/allantoin-cas-97-59-6\/\" target=\"_blank\" rel=\"noreferrer noopener\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">hol lehet megv\u00e1s\u00e1rolni Allantoin\uff1f<\/span><\/a><\/strong><\/h2>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"block-ec1c94cf-d71a-405b-bc1c-0f668efbb6ff\"><strong>A Longchang Chemical az Allantoin CAS 97-59-6 gy\u00e1rt\u00e1s\u00e1ra \u00e9s sz\u00e1ll\u00edt\u00e1s\u00e1ra specializ\u00e1l\u00f3dott. \u00c1ltal\u00e1ban 24 \u00f3r\u00e1n bel\u00fcl felvessz\u00fck \u00d6nnel a kapcsolatot. A munkaid\u0151ben ( 8:30-18:00 UTC+8 H.~Szombat ) vagy a weboldal \u00e9l\u0151 chat seg\u00edts\u00e9g\u00e9vel a info@longchangchemical.com e-mail c\u00edmre is k\u00fcldhet e-mailt, hogy azonnali v\u00e1laszt kapjon.<\/strong><\/h4>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"block-7edc1230-2340-4d50-bcbf-7af68000beef\"><strong>Ezt a cikket a Longchang Chemical R&amp;D Department \u00edrta. Ha m\u00e1solni \u00e9s \u00fajranyomtatni szeretn\u00e9, k\u00e9rj\u00fck, adja meg a forr\u00e1st.<\/strong>.<\/h4>\n\n\n<!-- lc-commercial-start -->\n<h2>A practical selection checklist for wetting, leveling, and defoaming additives<\/h2>\n<p>Additive selection is usually most effective when the team defines the defect first and then screens compatibility, dosage range, and process stage. That is often much more reliable than choosing only by chemistry family or by a single dramatic lab result.<\/p>\n<ul>\n<li><strong>Start from the defect, not the additive name:<\/strong> wetting loss, crater, microfoam, and instability often need different solutions even inside the same formula.<\/li>\n<li><strong>Check compatibility at the intended dosage:<\/strong> the strongest additive can still be the wrong commercial choice if it narrows the process window too much.<\/li>\n<li><strong>Review the stage of use:<\/strong> some products are most useful during grind, while others matter more during let-down, filling, or final application.<\/li>\n<li><strong>Balance cure or film quality with defect control:<\/strong> the right additive fixes the problem without sacrificing adhesion, gloss, or appearance.<\/li>\n<\/ul>\n<h3>Recommended product references<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/hu\/product\/chlumiaf-094\/\">CHLUMIAF 094<\/a>:<\/strong> A balanced defoamer reference for waterborne coatings and many general foam-control screens.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/hu\/product\/chlumiaf-3062\/\">CHLUMIAF 3062<\/a>:<\/strong> Useful when printing-ink and UV-ink compatibility matter in the defoaming screen.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/hu\/product\/chlumiaf-3037\/\">CHLUMIAF 3037<\/a>:<\/strong> A stronger process-defoaming option when persistent foam survives harsher conditions.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/hu\/product\/chlumiwe-3280\/\">CHLUMIWE 3280<\/a>:<\/strong> A strong wetting-agent reference for inks, coatings, and difficult substrate wetting.<\/li>\n<\/ul>\n<h3>FAQ for buyers and formulators<\/h3>\n<p><strong>Why does an additive that looks powerful in a beaker sometimes fail in production?<\/strong><br \/>Because shear, temperature, substrate, and the full formula can all change the way the additive performs under real process conditions.<\/p>\n<p><strong>Should the most aggressive additive always be preferred?<\/strong><br \/>Not usually. The best additive is the one that solves the real defect while preserving the broadest safe operating window.<\/p>\n<!-- lc-commercial-end -->","protected":false},"excerpt":{"rendered":"<p>Due to its wide application, the demand for allantoin has been increasing year by year . The chemical synthesis method of allantoin appeared in foreign countries in the 1940s. But<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[105],"tags":[],"class_list":["post-3483","post","type-post","status-publish","format-standard","hentry","category-medicine-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Properties and synthetic routes of allantoin and its derivatives - Longchang Chemical Co., Ltd.<\/title>\n<meta name=\"description\" content=\"Properties and synthetic routes of allantoin and its derivatives. Longchang Chemical specializes in the production and supply of Allantoin CAS 97-59-6. 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