{"id":6852,"date":"2024-04-22T07:28:15","date_gmt":"2024-04-22T07:28:15","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=6852"},"modified":"2026-04-28T10:42:27","modified_gmt":"2026-04-28T10:42:27","slug":"how-to-solve-the-problem-of-discolouration-of-produced-plastic-products","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/hu\/how-to-solve-the-problem-of-discolouration-of-produced-plastic-products\/","title":{"rendered":"Hogyan oldhat\u00f3 meg a gy\u00e1rtott m\u0171anyag term\u00e9kek elsz\u00ednez\u0151d\u00e9s\u00e9nek probl\u00e9m\u00e1ja?"},"content":{"rendered":"<h1><strong>Hogyan oldhat\u00f3 meg a gy\u00e1rtott m\u0171anyag term\u00e9kek elsz\u00ednez\u0151d\u00e9s\u00e9nek probl\u00e9m\u00e1ja?<\/strong><\/h1>\n<p><!-- lc-qa-start --><\/p>\n<p><strong>Gyors v\u00e1lasz:<\/strong> UV monomers and oligomers are usually chosen by viscosity, adhesion, flexibility, shrinkage, and cure speed as a package. The most reliable formulas come from balancing those properties rather than maximizing only one.<\/p>\n<p><!-- lc-qa-end --><\/p>\n<p>\u25cf A m\u0171anyag term\u00e9kek sz\u00ednez\u00e9s\u00e9n\u00e9l, p\u00e9ld\u00e1ul a sz\u00ednez\u0151porok vagy a mesterkever\u00e9kek haszn\u00e1lat\u00e1val, el\u0151fordulhat a sz\u00ednv\u00e1ltoz\u00e1s jelens\u00e9ge, ami befoly\u00e1solhatja a term\u00e9k min\u0151s\u00e9g\u00e9t.<\/p>\n<p>A sz\u00ednv\u00e1ltoz\u00e1s lehets\u00e9ges okai:<\/p>\n<p>(1) Az alapgyanta oxidat\u00edv boml\u00e1sa okozza a magas h\u0151m\u00e9rs\u00e9klet\u0171 form\u00e1z\u00e1s sor\u00e1n;<\/p>\n<p>(2) A m\u0171anyag term\u00e9kek egyes \u00f6sszetev\u0151i, p\u00e9ld\u00e1ul az alap \u00e9s a seg\u00e9danyag, vagy az alap \u00e9s a sz\u00ednez\u0151 pigment, vagy a seg\u00e9danyag \u00e9s a pigment k\u00f6z\u00f6tti k\u00e9miai reakci\u00f3 miatt;<\/p>\n<p>(3) A magas h\u0151m\u00e9rs\u00e9kletnek nem ellen\u00e1ll\u00f3 sz\u00ednez\u0151 pigment vagy adal\u00e9kanyagok \u00e1ltal okozott, \u00e9s \u00edgy tov\u00e1bb.<\/p>\n<p>Az eml\u00edtett t\u00e9nyez\u0151k \u00e1ltal okozott sz\u00ednv\u00e1ltoz\u00e1s mechanizmus\u00e1nak elemz\u00e9s\u00e9vel a k\u00f6vetkez\u0151kben a m\u0171anyagterm\u00e9k-gy\u00e1rt\u00f3k sz\u00e1m\u00e1ra ny\u00fajtunk hivatkoz\u00e1si alapot, hogy helyesen v\u00e1lassz\u00e1k ki a nyersanyagokat, \u00e9s min\u0151s\u00edtett m\u0171anyagterm\u00e9keket \u00e1ll\u00edtsanak el\u0151.<\/p>\n<p>-A m\u0171anyag form\u00e1z\u00e1si folyamat \u00e1ltal okozott sz\u00ednv\u00e1ltoz\u00e1s<\/p>\n<p>1. Az alapgyanta oxidat\u00edv leboml\u00e1sa \u00e9s elsz\u00ednez\u0151d\u00e9se a magas h\u0151m\u00e9rs\u00e9klet\u0171 form\u00e1z\u00e1s sor\u00e1n.<\/p>\n<p>Ha a m\u0171anyag \u00f6nt\u0151berendez\u00e9s f\u0171t\u0151gy\u0171r\u0171je vagy f\u0171t\u0151lemeze nem szab\u00e1lyozhat\u00f3 \u00e9s mindig f\u0171t\u00e9si \u00e1llapotban van, k\u00f6nnyen okozhat t\u00fal magas helyi h\u0151m\u00e9rs\u00e9kletet, \u00edgy a gyanta oxidat\u00edv boml\u00e1sa magas h\u0151m\u00e9rs\u00e9kleten t\u00f6rt\u00e9nik, a h\u0151\u00e9rz\u00e9keny m\u0171anyagok, p\u00e9ld\u00e1ul a PVC stb. eset\u00e9ben val\u00f3sz\u00edn\u0171bb, hogy ez a jelens\u00e9g megjelenik az \u00f6nt\u00e9si folyamat sor\u00e1n, \u00e9s amikor komolyan megt\u00f6rt\u00e9nik, akkor \u00e9gett \u00e9s s\u00e1rg\u00e1v\u00e1 vagy ak\u00e1r feket\u00e9v\u00e9 v\u00e1lik, \u00e9s nagysz\u00e1m\u00fa alacsony molekul\u00e1j\u00fa ill\u00e9kony anyag t\u00e1vozik.<\/p>\n<p>Ez a lebont\u00e1s mag\u00e1ban foglalja a depolimeriz\u00e1ci\u00f3t, a v\u00e9letlenszer\u0171 l\u00e1ncbont\u00e1st, az oldalcsoportok \u00e9s alacsony molekulat\u00f6megek elt\u00e1vol\u00edt\u00e1s\u00e1t \u00e9s egy\u00e9b reakci\u00f3kat.<\/p>\n<p>&nbsp;<\/p>\n<p>(1) Depolimeriz\u00e1ci\u00f3<\/p>\n<p>Depolimeriz\u00e1ci\u00f3s reakci\u00f3 el\u0151sz\u00f6r a makromolekula v\u00e9g\u00e9n a sz\u00fcnet, majd a l\u00e1nc mechanizmusa szerint gyorsan elt\u00e1vol\u00edtani a monomer, a polimeriz\u00e1ci\u00f3 a fels\u0151 hat\u00e1r\u00e9rt\u00e9k feletti h\u0151m\u00e9rs\u00e9klet polimeriz\u00e1ci\u00f3ja k\u00fcl\u00f6n\u00f6sen k\u00f6nnyen elv\u00e9gezhet\u0151.<\/p>\n<p>&nbsp;<\/p>\n<p>(2) V\u00e9letlenszer\u0171 l\u00e1nct\u00f6r\u00e9s (degrad\u00e1ci\u00f3)<\/p>\n<p>A polimerek, mint p\u00e9ld\u00e1ul a PE \u00e9s m\u00e1s polimerek magas h\u0151m\u00e9rs\u00e9kleten t\u00f6rt\u00e9n\u0151 form\u00e1z\u00e1sa eset\u00e9n a f\u0151 l\u00e1nc b\u00e1rmelyik poz\u00edci\u00f3ban megszakadhat, a molekulat\u00f6meg gyorsan cs\u00f6kken, de a monomer hozam nagyon kicsi, ezt a fajta reakci\u00f3t v\u00e9letlenszer\u0171 l\u00e1nct\u00f6r\u00e9snek, n\u00e9ha degrad\u00e1ci\u00f3nak is nevezik, a szabad gy\u00f6k\u00f6k k\u00e9pz\u0151d\u00e9s\u00e9nek polietil\u00e9n l\u00e1nct\u00f6r\u00e9se nagyon akt\u00edv, nagysz\u00e1m\u00fa m\u00e1sodlagos hidrog\u00e9nnel k\u00f6r\u00fclv\u00e9ve, k\u00f6nny\u0171 l\u00e1nc\u00e1tad\u00e1si reakci\u00f3, szinte nincs monomer gener\u00e1ci\u00f3.<\/p>\n<p>&nbsp;<\/p>\n<p>(3) Szubsztituensek elt\u00e1vol\u00edt\u00e1sa<\/p>\n<p>Polivinil-klorid, polivinil-acet\u00e1t, poliakrilnitril, polifluor-etil\u00e9n stb. Meleg\u00edt\u00e9s hat\u00e1s\u00e1ra a szubsztituenscsoport elt\u00e1vol\u00edt\u00e1sra ker\u00fcl. Polyvinil-klorid (PVC), p\u00e9ld\u00e1ul PVC feldolgoz\u00e1sa \u00f6nt\u00e9s a h\u0151m\u00e9rs\u00e9klet alatt 180 ~ 200 \u2103, de alacsonyabb h\u0151m\u00e9rs\u00e9kleten (p\u00e9ld\u00e1ul 100 ~ 120 \u2103), azaz a kezdete dehidrog\u00e9nez\u00e9s (HCl), 200 \u2103 k\u00f6r\u00fcl a vesztes\u00e9g HCl nagyon gyorsan, \u00fagy, hogy a polimer egy s\u00f6t\u00e9t sz\u00edn\u0171, az er\u0151ss\u00e9ge az alacsonyabb, a teljes reakci\u00f3 r\u00f6viden a k\u00f6vetkez\u0151k\u00e9ppen \u00edrhat\u00f3 le: ~ ~ ~ CH2CHCICH2CHCl ~ \u2192 \u2192 \u2192 ~ CH=CHCH=CH \uff5e+2HCl<\/p>\n<p>A szabad HCl katalitikus hat\u00e1ssal van a hidrog\u00e9n-klorid, a f\u00e9mkloridok, p\u00e9ld\u00e1ul a hidrog\u00e9n-klorid \u00e9s a vas-kloridot alkot\u00f3 feldolgoz\u00f3 berendez\u00e9sek elt\u00e1vol\u00edt\u00e1s\u00e1ra, a katalitikus hat\u00e1s el\u0151seg\u00edt\u00e9s\u00e9re: 3HCl + Fe \u2192 FeCl3 + 3HCl<\/p>\n<p>A h\u0151kezel\u00e9s sor\u00e1n a PVC-hez a stabilit\u00e1s jav\u00edt\u00e1sa \u00e9rdek\u00e9ben n\u00e9h\u00e1ny sz\u00e1zal\u00e9k savabszorber, p\u00e9ld\u00e1ul b\u00e1rium-sztear\u00e1t, szerves \u00f3n, \u00f3lomvegy\u00fcletek stb. adhat\u00f3.<\/p>\n<p>A kommun\u00e1lis t\u00e1vk\u00f6zl\u00e9si k\u00e1belek t\u00e1vk\u00f6zl\u00e9si k\u00e1belvezet\u00e9kekkel t\u00f6rt\u00e9n\u0151 sz\u00ednez\u00e9s\u00e9n\u00e9l a r\u00e9zvezet\u0151n l\u00e9v\u0151 poliolefinr\u00e9teg nem stabiliz\u00e1l\u00f3dik j\u00f3l, \u00e9s a polimer-r\u00e9z hat\u00e1rfel\u00fcleten z\u00f6ld r\u00e9zkarboxil\u00e1t k\u00e9pz\u0151dik. Ezek a reakci\u00f3k el\u0151seg\u00edtik a r\u00e9z diff\u00fazi\u00f3j\u00e1t a polimerbe, \u00e9s felgyors\u00edtj\u00e1k a r\u00e9z katalitikus oxid\u00e1ci\u00f3j\u00e1t.<\/p>\n<p>Ez\u00e9rt a poliolefinek oxidat\u00edv degrad\u00e1ci\u00f3j\u00e1nak cs\u00f6kkent\u00e9se \u00e9rdek\u00e9ben gyakran adnak hozz\u00e1 fenolos vagy arom\u00e1s amin antioxid\u00e1nsokat (AH), amelyek megsz\u00fcntetik a fenti reakci\u00f3t, az inakt\u00edv A-gy\u00f6k k\u00e9pz\u0151d\u00e9s\u00e9t: ROO- + AH - \u2192 ROOH + A-<\/p>\n<p>&nbsp;<\/p>\n<p>(4) Oxidat\u00edv lebont\u00e1s<\/p>\n<p>A polimerek a feldolgoz\u00e1s \u00e9s a felhaszn\u00e1l\u00e1s sor\u00e1n a leveg\u0151 oxig\u00e9nj\u00e9nek vannak kit\u00e9ve, \u00e9s az oxidat\u00edv leboml\u00e1s felgyorsul, ha h\u0151 hat\u00e1s\u00e1ra a polimerek h\u0151nek vannak kit\u00e9ve.<\/p>\n<p>A poliolefinek termikus oxid\u00e1ci\u00f3ja az autokatalitikus viselked\u00e9s\u0171 szabadgy\u00f6k-l\u00e1ncreakci\u00f3 mechanizmus\u00e1hoz tartozik, amely h\u00e1rom l\u00e9p\u00e9sre oszthat\u00f3: a beindul\u00e1s, a n\u00f6veked\u00e9s \u00e9s a befejez\u00e9s.<\/p>\n<p>A hidroperoxid-csoport \u00e1ltal okozott l\u00e1ncszakad\u00e1s a molekulat\u00f6meg cs\u00f6kken\u00e9s\u00e9hez vezet, \u00e9s a homolitikus hasad\u00e1s f\u0151 term\u00e9kei alkoholok, aldehidek, ketonok, v\u00e9g\u00fcl karbonsavakk\u00e1 oxid\u00e1l\u00f3dnak. A karbonsav a f\u00e9mkataliz\u00e1lt oxid\u00e1ci\u00f3ban j\u00e1tszik f\u0151szerepet.<\/p>\n<p>&nbsp;<\/p>\n<p>2. A m\u0171anyag form\u00e1z\u00e1s \u00e9s feldolgoz\u00e1s sor\u00e1n a sz\u00ednez\u0151anyag a magas h\u0151m\u00e9rs\u00e9klet-t\u0171r\u00e9s miatt lebomlik \u00e9s elsz\u00ednez\u0151dik.<\/p>\n<p>A m\u0171anyagok sz\u00ednez\u00e9s\u00e9hez haszn\u00e1lt pigmentek vagy sz\u00ednez\u00e9kek h\u0151m\u00e9rs\u00e9klet-ellen\u00e1ll\u00f3s\u00e1gi hat\u00e1r\u00e9rt\u00e9kkel rendelkeznek, amikor a h\u0151m\u00e9rs\u00e9klet el\u00e9ri ezt a hat\u00e1r\u00e9rt\u00e9ket, a pigmentek vagy sz\u00ednez\u00e9kek k\u00e9miai v\u00e1ltoz\u00e1sokon mennek kereszt\u00fcl, k\u00fcl\u00f6nb\u00f6z\u0151 alacsonyabb molekulat\u00f6meg\u0171 vegy\u00fcletek keletkeznek, amelyek reakci\u00f3k\u00e9plete bonyolultabb; a k\u00fcl\u00f6nb\u00f6z\u0151 pigmentek k\u00fcl\u00f6nb\u00f6z\u0151 reakci\u00f3kkal \u00e9s term\u00e9kekkel rendelkeznek, \u00e9s a k\u00fcl\u00f6nb\u00f6z\u0151 pigmentek h\u0151m\u00e9rs\u00e9klet-ellen\u00e1ll\u00f3s\u00e1g\u00e1t a s\u00falyvesztes\u00e9g \u00e9s m\u00e1s analitikai m\u00f3dszerek seg\u00edts\u00e9g\u00e9vel lehet kimutatni.<\/p>\n<p>-A sz\u00ednv\u00e1ltoz\u00e1st a sz\u00ednez\u0151anyag \u00e9s a gyanta k\u00f6z\u00f6tti reakci\u00f3 okozza.<\/p>\n<p>A sz\u00ednez\u0151anyag \u00e9s a gyanta k\u00f6z\u00f6tti reakci\u00f3 els\u0151sorban n\u00e9h\u00e1ny pigmentben vagy sz\u00ednez\u00e9kben \u00e9s gyant\u00e1ban nyilv\u00e1nul meg feldolgoz\u00e1s \u00e9s form\u00e1z\u00e1s sor\u00e1n, ezek a k\u00e9miai reakci\u00f3k a sz\u00ednf\u00e1zis megv\u00e1ltoz\u00e1s\u00e1hoz \u00e9s a polimer leboml\u00e1s\u00e1hoz vezetnek, \u00edgy a term\u00e9kek teljes\u00edtm\u00e9nye megv\u00e1ltozik.<\/p>\n<p>1.redukci\u00f3s reakci\u00f3<\/p>\n<p>Bizonyos polimerek, mint p\u00e9ld\u00e1ul a nejlon \u00e9s amino m\u0171anyagok olvadt \u00e1llapotban, egy nagyon er\u0151s savas reduk\u00e1l\u00f3szer, akkor lehet, hogy a feldolgoz\u00e1si h\u0151m\u00e9rs\u00e9klet nagyon stabil pigmentek vagy sz\u00ednez\u00e9kek cs\u00f6kken, hogy elhalv\u00e1nyul.<\/p>\n<p>2. L\u00fagcsere hat\u00e1sa<\/p>\n<p>A PVC emulzi\u00f3s polimerben vagy n\u00e9h\u00e1ny stabiliz\u00e1lt polipropil\u00e9nben l\u00e9v\u0151 alk\u00e1lif\u00f6ldf\u00e9mek \"l\u00fagcser\u00e9t\" v\u00e9gezhetnek a sz\u00ednez\u0151anyagban l\u00e9v\u0151 alk\u00e1lif\u00f6ldf\u00e9mekkel, \u00edgy a sz\u00edn k\u00e9k-v\u00f6r\u00f6sr\u0151l narancss\u00e1rg\u00e1ra v\u00e1ltozik.<\/p>\n<p>PVC emulzi\u00f3s polimer VC az emulge\u00e1l\u00f3szer (mint p\u00e9ld\u00e1ul a n\u00e1trium-dodecil-szulf\u00e1t C12H25SO3Na) vizes oldatban a kever\u00e9ses polimeriz\u00e1ci\u00f3s m\u00f3dszer seg\u00edts\u00e9g\u00e9vel, a reakci\u00f3 Na +; annak \u00e9rdek\u00e9ben, hogy jav\u00edtsa a h\u0151 \u00e9s az oxig\u00e9n teljes\u00edtm\u00e9nye PP, gyakran hozz\u00e1adott 1010, DLTDP \u00e9s m\u00e1s antioxid\u00e1nsok, antioxid\u00e1nsok 1010 egy tercier-butil 3,5 a 4 hidroxi-prop\u00e1nsav metil-\u00e9szter \u00e9s n\u00e1trium-pentaeritritol kataliz\u00e1lt \u00e9sztercsere reakci\u00f3. A DLTDP-t Na2S vizes oldat \u00e9s akrilnitril reakci\u00f3j\u00e1val \u00e1ll\u00edtj\u00e1k el\u0151, hogy tiodipropionitrilt kapjanak, hidroliz\u00e1lva tiodipropionsavat, v\u00e9g\u00fcl lauril-alkohollal \u00e9szterezik, a reakci\u00f3 Na+ -t is tartalmaz.<\/p>\n<p>M\u0171anyag term\u00e9kek form\u00e1z\u00e1sakor a gyant\u00e1ban marad\u00f3 Na+ reakci\u00f3ba l\u00e9p a f\u00e9mionokat tartalmaz\u00f3 sz\u00ednkiv\u00e1laszt\u00f3 pigmenttel, mint p\u00e9ld\u00e1ul a C.I.Pigment-Red48:2 (BBC vagy 2BP): XCa2++2Na+\u21922XNa++Ca2+.<\/p>\n<p>3. Reakci\u00f3 a pigment \u00e9s a hidrog\u00e9n-halogenid (HX) k\u00f6z\u00f6tt<\/p>\n<p>A PVC dekonjug\u00e1l\u00f3dik HCI-v\u00e9, \u00e9s konjug\u00e1lt kett\u0151s k\u00f6t\u00e9seket k\u00e9pez, ha a h\u0151m\u00e9rs\u00e9klet 170 \u00b0C-ra emelkedik, vagy f\u00e9ny hat\u00e1s\u00e1ra.<\/p>\n<p>A halog\u00e9ntartalm\u00fa \u00e9g\u00e9sg\u00e1tl\u00f3 poliolefin vagy sz\u00ednes \u00e9g\u00e9sg\u00e1tl\u00f3 m\u0171anyag term\u00e9kek magas h\u0151m\u00e9rs\u00e9kleten t\u00f6rt\u00e9n\u0151 fr\u00f6ccs\u00f6nt\u00e9se sor\u00e1n szint\u00e9n hidrog\u00e9n HX dehalog\u00e9nezett.<\/p>\n<p>(1) Az ultramarin \u00e9s a HX k\u00f6z\u00f6tti reakci\u00f3<\/p>\n<p>Az ultramarin pigment, amelyet sz\u00e9les k\u00f6rben haszn\u00e1lnak m\u0171anyagok sz\u00ednez\u00e9s\u00e9re vagy a s\u00e1rga f\u00e9ny megsz\u00fcntet\u00e9s\u00e9re, egy k\u00e9ntartalm\u00fa komplex.<\/p>\n<p>(2) A r\u00e9z pigment felgyors\u00edtja a PVC-gyanta oxidat\u00edv boml\u00e1s\u00e1t.<\/p>\n<p>A r\u00e9z pigment magas h\u0151m\u00e9rs\u00e9kleten Cu+ \u00e9s Cu2+ oxid\u00e1l\u00f3dhat, ami felgyors\u00edtja a PVC boml\u00e1s\u00e1t.<\/p>\n<p>(3) A f\u00e9mionok rombol\u00f3 hat\u00e1sa a polimerre<\/p>\n<p>Egyes pigmentek rombol\u00f3 hat\u00e1ssal vannak a polimerekre, mint p\u00e9ld\u00e1ul a mang\u00e1n pigment C.I.PigmentRed48:4 nem alkalmas a PP m\u0171anyag term\u00e9kek form\u00e1z\u00e1s\u00e1ra, ennek oka abban rejlik, hogy a v\u00e1ltoz\u00f3 valenci\u00e1j\u00fa f\u00e9m mang\u00e1nionjai kataliz\u00e1lj\u00e1k a hidroperoxidok boml\u00e1s\u00e1t az elektronok \u00e1tad\u00e1s\u00e1val a PP termikus oxid\u00e1ci\u00f3j\u00e1ban vagy fotooxid\u00e1ci\u00f3j\u00e1ban, ami a PP gyors\u00edtott \u00f6reged\u00e9s\u00e9hez vezet; a polikarbon\u00e1t \u00e9szterk\u00f6t\u00e9se k\u00f6nnyen hidroliz\u00e1l\u00f3dik, ha meleg\u00edtik \u00e9s lebomlik a l\u00fagok el\u0151tt, \u00e9s a f\u00e9mionok k\u00f6nnyebben el\u0151seg\u00edtik a boml\u00e1st, ha pigmentben vannak; a f\u00e9mionok k\u00f6nnyebben el\u0151seg\u00edtik a boml\u00e1st. Ha a pigmentben f\u00e9mionok vannak, k\u00f6nnyebben el\u0151seg\u00edti a boml\u00e1st; a f\u00e9mionok el\u0151seg\u00edtik a PVC \u00e9s m\u00e1s gyant\u00e1k termo-oxidat\u00edv boml\u00e1s\u00e1t is, \u00e9s sz\u00ednv\u00e1ltoz\u00e1sokhoz vezetnek.<\/p>\n<p>\u00d6sszefoglalva, ez a legmegval\u00f3s\u00edthat\u00f3bb \u00e9s leghat\u00e9konyabb m\u00f3dja annak, hogy a m\u0171anyag term\u00e9kek gy\u00e1rt\u00e1sa sor\u00e1n elker\u00fclj\u00fck a gyant\u00e1val reakci\u00f3ba l\u00e9p\u0151 sz\u00ednez\u0151anyag haszn\u00e1lat\u00e1t.<\/p>\n<p>-A sz\u00ednez\u0151anyagok \u00e9s a seg\u00e9danyagok k\u00f6z\u00f6tti reakci\u00f3<\/p>\n<p>1\u3001K\u00e9ntartalm\u00fa pigment \u00e9s seg\u00e9danyagok k\u00f6z\u00f6tti reakci\u00f3<\/p>\n<p>A k\u00e9ntartalm\u00fa pigmentek, mint p\u00e9ld\u00e1ul a kadmiums\u00e1rga (CdS \u00e9s CdSe szil\u00e1rd oldata), nem haszn\u00e1lhat\u00f3k PVC-ben a gyenge sav\u00e1ll\u00f3s\u00e1g miatt, \u00e9s nem haszn\u00e1lhat\u00f3k \u00f3lomtartalm\u00fa seg\u00e9danyagokkal egy\u00fctt.<\/p>\n<p>2\u3001Az \u00f3lomtartalm\u00fa vegy\u00fcletek \u00e9s a k\u00e9ntartalm\u00fa stabiliz\u00e1torok k\u00f6z\u00f6tti reakci\u00f3<\/p>\n<p>Kr\u00f3ms\u00e1rga pigment vagy molibd\u00e9n kr\u00f3mv\u00f6r\u00f6s az \u00f3lomkomponensben \u00e9s antioxid\u00e1ns, p\u00e9ld\u00e1ul tiodisztear\u00e1t DSTDP reakci\u00f3.<\/p>\n<p>3\u3001Reakci\u00f3 a pigment \u00e9s az antioxid\u00e1ns k\u00f6z\u00f6tt<\/p>\n<p>Az antioxid\u00e1nst tartalmaz\u00f3 gyant\u00e1ban, mint p\u00e9ld\u00e1ul a PP, n\u00e9h\u00e1ny pigment \u00e9s antioxid\u00e1ns is reakci\u00f3ba l\u00e9p, \u00edgy gyeng\u00edti az antioxid\u00e1ns funkci\u00f3j\u00e1t, \u00e9s a gyanta h\u0151- \u00e9s oxig\u00e9nstabilit\u00e1sa rosszabb lesz.<\/p>\n<p>P\u00e9ld\u00e1ul a fenolos antioxid\u00e1ns k\u00f6nnyen felsz\u00edv\u00f3dik a korom \u00e1ltal, vagy reakci\u00f3ba l\u00e9p vele, \u00e9s elvesz\u00edti aktivit\u00e1s\u00e1t; a fenolos antioxid\u00e1ns \u00e9s a tit\u00e1nion fenolos arom\u00e1s komplexet k\u00e9pez feh\u00e9r vagy vil\u00e1gos sz\u00edn\u0171 m\u0171anyag term\u00e9kekben, ami a term\u00e9kek s\u00e1rgul\u00e1s\u00e1t eredm\u00e9nyezi; a feh\u00e9r pigment (TiO2) sz\u00ednv\u00e1ltoz\u00e1s\u00e1t megfelel\u0151 antioxid\u00e1ns kiv\u00e1laszt\u00e1s\u00e1val vagy seg\u00e9danyagok, p\u00e9ld\u00e1ul cink sav\u00e1ll\u00f3 s\u00f3 (cink-sztear\u00e1t) vagy P2-t\u00edpus\u00fa foszfit hozz\u00e1ad\u00e1s\u00e1val megakad\u00e1lyozhatjuk.<\/p>\n<p>4\u3001Reakci\u00f3 a pigment \u00e9s a f\u00e9nystabiliz\u00e1tor k\u00f6z\u00f6tt<\/p>\n<p>Amikor a pigment \u00e9s a f\u00e9nystabiliz\u00e1tor reakci\u00f3ba l\u00e9p, a kor\u00e1bban eml\u00edtett k\u00e9ntartalm\u00fa pigment \u00e9s a nikkeltartalm\u00fa f\u00e9nystabiliz\u00e1tor k\u00f6z\u00f6tti reakci\u00f3 mellett ez \u00e1ltal\u00e1noss\u00e1gban cs\u00f6kkenti a f\u00e9nystabiliz\u00e1tor hat\u00e1s\u00e1t. K\u00fcl\u00f6n\u00f6sen akkor, ha az akad\u00e1lyoz\u00f3 amin f\u00e9nystabiliz\u00e1tor \u00e9s az azo s\u00e1rga \u00e9s v\u00f6r\u00f6s pigment szerepe befoly\u00e1solja, a f\u00e9nystabiliz\u00e1l\u00f3 hat\u00e1s m\u00e9g nyilv\u00e1nval\u00f3bban cs\u00f6kken, \u00e9s nem olyan j\u00f3, mint a sz\u00edntelen stabiliz\u00e1l\u00f3 hat\u00e1s, \u00e9s jelenleg nincs pontos magyar\u00e1zat erre a jelens\u00e9gre.<\/p>\n<p>-A seg\u00e9deszk\u00f6z\u00f6k k\u00f6z\u00f6tti reakci\u00f3<\/p>\n<p>Ha sok seg\u00e9danyagot helytelen\u00fcl haszn\u00e1lnak, v\u00e1ratlan reakci\u00f3 l\u00e9phet fel, \u00e9s a term\u00e9kek sz\u00edne megv\u00e1ltozhat. P\u00e9ld\u00e1ul az \u00e9g\u00e9sg\u00e1tl\u00f3 Sb2O3 reakci\u00f3ba l\u00e9p a k\u00e9nnel, \u00e9s Sb2S3 keletkezik: Sb2O3+-S-\u2192Sb2S3+-O-.<\/p>\n<p>Ez\u00e9rt a gy\u00e1rt\u00e1si k\u00e9plet figyelembev\u00e9telekor a seg\u00e9danyagokat gondosan kell kiv\u00e1lasztani.<\/p>\n<p>-Az adal\u00e9kanyagok \u00f6noxid\u00e1ci\u00f3ja miatti sz\u00ednv\u00e1ltoz\u00e1s<\/p>\n<p>A fenolos stabiliz\u00e1torok \u00f6noxid\u00e1ci\u00f3ja fontos t\u00e9nyez\u0151 a feh\u00e9r vagy vil\u00e1gos sz\u00edn\u0171 term\u00e9kek sz\u00ednv\u00e1ltoz\u00e1s\u00e1nak el\u0151seg\u00edt\u00e9s\u00e9ben, amit k\u00fclf\u00f6ld\u00f6n gyakran \"r\u00f3zsasz\u00ednesed\u00e9snek\" (v\u00f6r\u00f6ses) neveznek.<\/p>\n<p>Az oxid\u00e1ci\u00f3s term\u00e9kek, mint p\u00e9ld\u00e1ul a BHT antioxid\u00e1ns (2-6-di-terc-butil-4-metilfenol), \u00e9s a 3,3\u2032,5,5\u2032 homostilbene kinon f\u00e9nyv\u00f6r\u00f6s reakci\u00f3term\u00e9kk\u00e9nt alakult ki, ez a fajta elsz\u00ednez\u0151d\u00e9s csak oxig\u00e9n \u00e9s v\u00edz jelenl\u00e9t\u00e9ben \u00e9s f\u00e9ny hi\u00e1ny\u00e1ban fordul el\u0151, ultraibolya f\u00e9nynek val\u00f3 kitetts\u00e9g, f\u00e9nyv\u00f6r\u00f6s homostilbene kinon gyorsan bomlik s\u00e1rga monociklusos term\u00e9kk\u00e9.<\/p>\n<p>-A sz\u00ednez\u0151 pigmentek sz\u00ednv\u00e1ltoz\u00e1sa f\u00e9ny \u00e9s h\u0151 hat\u00e1s\u00e1ra<\/p>\n<p>F\u00e9ny \u00e9s h\u0151 hat\u00e1s\u00e1ra egyes sz\u00ednez\u0151 pigmentek molekul\u00e1ris konfigur\u00e1ci\u00f3ja izomerizmusba v\u00e1ltozik, p\u00e9ld\u00e1ul a C.I.Pig.R2(BBC) pigment haszn\u00e1lata azo-t\u00edpusb\u00f3l kinon-t\u00edpus\u00fav\u00e1 v\u00e1ltozik, ami megv\u00e1ltoztatja az eredeti konjug\u00e1ci\u00f3s hat\u00e1st, \u00e9s a konjug\u00e1lt k\u00f6t\u00e9s cs\u00f6kken\u00e9s\u00e9t okozza, \u00e9s a sz\u00edn s\u00f6t\u00e9tk\u00e9k-v\u00f6r\u00f6sr\u0151l vil\u00e1gos narancsv\u00f6r\u00f6sre v\u00e1ltozik.<\/p>\n<p>Ugyanakkor a f\u00e9ny katalitikus hat\u00e1s\u00e1ra a v\u00edzzel egy\u00fctt bomlik, ami a ko-krist\u00e1lyos v\u00edzben v\u00e1ltoz\u00e1sokat \u00e9s halv\u00e1nyod\u00e1st okoz.<\/p>\n<p>-A l\u00e9gk\u00f6ri szennyez\u0151 anyagok \u00e1ltal okozott sz\u00ednv\u00e1ltoz\u00e1s<\/p>\n<p>A m\u0171anyag term\u00e9kek t\u00e1rol\u00e1sakor vagy haszn\u00e1latakor egyes reakt\u00edv csoportok, f\u00fcggetlen\u00fcl a gyant\u00e1t\u00f3l vagy adal\u00e9kanyagokt\u00f3l, illetve a sz\u00ednez\u0151 pigmentekt\u0151l, a f\u00e9ny \u00e9s a h\u0151 hat\u00e1s\u00e1ra k\u00f6lcs\u00f6nhat\u00e1sba l\u00e9pnek a nedvess\u00e9ggel vagy a l\u00e9gk\u00f6rben l\u00e9v\u0151 k\u00e9miai szennyez\u0151 anyagokkal, p\u00e9ld\u00e1ul savakkal \u00e9s l\u00fagokkal, k\u00fcl\u00f6nb\u00f6z\u0151 \u00f6sszetett k\u00e9miai reakci\u00f3kat okozva, amelyek hossz\u00fa t\u00e1von elsz\u00ednez\u0151d\u00e9shez vagy elsz\u00ednez\u0151d\u00e9shez vezetnek.<\/p>\n<p>Megfelel\u0151 h\u0151- \u00e9s oxig\u00e9nstabiliz\u00e1torok, f\u00e9nystabiliz\u00e1torok hozz\u00e1ad\u00e1s\u00e1val, illetve kiv\u00e1l\u00f3 min\u0151s\u00e9g\u0171 id\u0151j\u00e1r\u00e1s\u00e1ll\u00f3 adal\u00e9kanyagok \u00e9s pigmentek kiv\u00e1laszt\u00e1s\u00e1val ez a helyzet elker\u00fclhet\u0151 vagy m\u00e9rs\u00e9kelhet\u0151.<\/p>\n<p><!-- lc-commercial-start --><\/p>\n<h2>A practical sourcing and formulation view of UV monomers and oligomers<\/h2>\n<p>A legelterjedtebb UV-formul\u00e1ci\u00f3k \u00fagy k\u00e9sz\u00fclnek, hogy el\u0151sz\u00f6r a f\u0151v\u00e1zat v\u00e1lasztj\u00e1k ki, majd a reakt\u00edv monomercsomagot a hordoz\u00f3hoz, a kik\u00f6t\u00e9si m\u00f3dhoz \u00e9s a felhaszn\u00e1l\u00e1s sor\u00e1n fell\u00e9p\u0151 ig\u00e9nybev\u00e9telekhez igaz\u00edtj\u00e1k. Ez \u00e1ltal\u00e1ban stabilabb eredm\u00e9nyt hoz, mint ha puszt\u00e1n a viszkozit\u00e1s vagy az \u00e1r alapj\u00e1n v\u00e1lasztan\u00e1nk meg az anyagokat.<\/p>\n<ul>\n<li><strong>Kezdje a v\u00e9gs\u0151 tulajdonc\u00e9lb\u00f3l:<\/strong> a kem\u00e9nys\u00e9g, a rugalmass\u00e1g, a tapad\u00e1s \u00e9s a zsugorod\u00e1s ritk\u00e1n utal pontosan ugyanarra a nyersanyagtartalomra.<\/li>\n<li><strong>Sz\u0171rje a reakt\u00edv csomagot eg\u00e9szk\u00e9nt:<\/strong> Az oligomer, a monomer \u00e9s a fotoinici\u00e1tor-v\u00e1laszt\u00e9k er\u0151sen k\u00f6lcs\u00f6nhat\u00e1sba l\u00e9p a UV rendszerekben.<\/li>\n<li><strong>Haszn\u00e1ld a viszkozit\u00e1st eszk\u00f6zk\u00e9nt, ne pedig az egyetlen d\u00f6nt\u00e9si szab\u00e1lyk\u00e9nt:<\/strong> A legk\u00f6nnyebben feldolgozhat\u00f3 anyag nem mindig az, amelyik kikem\u00e9nyed\u00e9s ut\u00e1n a legjobban teljes\u00edt.<\/li>\n<li><strong>Ellen\u0151rizd a val\u00f3s szubsztr\u00e1tumot:<\/strong> A m\u0171anyag, f\u00e9m, c\u00edmkef\u00f3lia, g\u00e9lrendszerek \u00e9s bevonatok nagyon elt\u00e9r\u0151 polarit\u00e1si \u00e9s kikem\u00e9nyed\u00e9si s\u0171r\u0171s\u00e9gi egyens\u00falyt eredm\u00e9nyezhetnek.<\/li>\n<\/ul>\n<h3>Aj\u00e1nlott term\u00e9kreferenci\u00e1k<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/hu\/product\/cas-270586-78-2\/\">CHLUMINIT TMO<\/a>:<\/strong> \u00c9rt\u00e9kes \u00f6sszehasonl\u00edt\u00e1si pont, amikor az alacsonyabb s\u00e1rgul\u00e1s vagy a TPO-csere megbesz\u00e9l\u00e9se fontos.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/hu\/product\/chlumiao-1010-cas-6683-19-8\/\">CHLUMIAO 1010<\/a>:<\/strong> Egy sz\u00e9les k\u00f6rben haszn\u00e1lt els\u0151dleges antioxid\u00e1ns etalon a hossz\u00fa t\u00e1v\u00fa termikus stabilit\u00e1shoz.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/hu\/product\/chlumiao-168-cas-31570-04-4\/\">CHLUMIAO 168<\/a>:<\/strong> Egy gyakorlati folyamatstabilit\u00e1si referenci\u00e1k, amikor a hidropoxid-szab\u00e1lyoz\u00e1s sz\u00e1m\u00edt.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/hu\/product\/chlumiao-dltdp-cas-123-28-4\/\">CHLUMIAO DLTDP<\/a>:<\/strong> Egy hasznos k\u00e9ntartalm\u00fa stabiliz\u00e1l\u00f3 \u00fat, amikor szinergikus antioxid\u00e1ns csomagokat vizsg\u00e1lnak.<\/li>\n<\/ul>\n<h3>GYIK v\u00e1s\u00e1rl\u00f3knak \u00e9s formul\u00e1l\u00f3knak<\/h3>\n<p><strong>Egy UV-monomer vagy gyanta megoldhat minden formul\u00e1ci\u00f3s probl\u00e9m\u00e1t?<\/strong><br \/>\u00c1ltal\u00e1ban nem. A kereskedelmileg er\u0151s formul\u00e1k att\u00f3l f\u00fcggenek, hogyan m\u0171k\u00f6dik egy\u00fctt t\u00f6bb komponens a kikem\u00e9nyed\u00e9s, tapad\u00e1s, foly\u00e1s \u00e9s tart\u00f3ss\u00e1g kiegyens\u00falyoz\u00e1s\u00e1ra.<\/p>\n<p><strong>Mi\u00e9rt kell a monomereket az oligomerekkel egy\u00fctt vizsg\u00e1lni?<\/strong><br \/>Mivel a monomerek megv\u00e1ltoztathatj\u00e1k a viszkozit\u00e1st, a k\u00f6t\u00e9si sebess\u00e9get, a zsugorod\u00e1st \u00e9s az aljzat viselked\u00e9s\u00e9t annyira, hogy befoly\u00e1solj\u00e1k ugyanazon alapgyanta v\u00e9gs\u0151 rangsorol\u00e1s\u00e1t.<\/p>\n<p><!-- lc-commercial-end --><\/p>","protected":false},"excerpt":{"rendered":"<p>\u25cf When colouring plastic products using methods such as colour powders or masterbatches, the phenomenon of colour change may occur, thus affecting the quality of the product. Possible causes of<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[117],"tags":[],"class_list":["post-6852","post","type-post","status-publish","format-standard","hentry","category-soresyn-resin"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to solve the problem of discolouration of produced plastic products? - Longchang Chemical<\/title>\n<meta name=\"description\" content=\"\u25cf When colouring plastic products using methods such as colour powders or masterbatches, the phenomenon of colour change may occur, thus affecting the q...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/longchangchemical.com\/hu\/how-to-solve-the-problem-of-discolouration-of-produced-plastic-products\/\" \/>\n<meta property=\"og:locale\" content=\"hu_HU\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to solve the problem of discolouration of produced plastic products? 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