Epoxy UV kurapa resin inoshandiswa zvakanyanya muminda yemagetsi ekukanda, anti-corrosion coating, simbi yekubatanidza uye zvichingodaro nekuda kwesimba rayo rekubatana, nzvimbo yakafara yekubatanidza, kuderera kwakadzika, kugadzikana kwakanaka, kuvharika kwemagetsi, kusimba kwemagetsi uye zvakanaka processability.Mumakore achangopfuura, epoxy UV yekurapa resin seindasitiri yakabudirira.
Nekudaro, parizvino, kushomeka kwemamiriro ekunze kwezvizhinji epoxy zvigadzirwa hazvina kusimba, kunyanya mukugadzira epoxy adhesive, led potting adhesive, epoxy UV kurapa resin jewelry adhesive, etc. zvinodiwa zveanti yellowing kuita kwe epoxy system.
Pane zvinhu zvakawanda zvinokonzera yellowing yezvigadzirwa zve epoxy: 1. Bisphenol chimiro cheanonhuhwirira epoxy UV kuporesa resin iri nyore kuita oxidize kuburitsa carbonyl kuumba yellowing boka;2. The free amine component muamine cureing agent inonatswa polymerized ne epoxy UV curring resin, zvichiita kuti tembiricha yemunharaunda ikwire uye kukurumidza kutsvuka;3. Tertiary amine accelerators uye nonylphenol accelerators zviri nyore kuchinja ruvara pasi peokisijeni inopisa uye UV irradiation;4. Kana tembiricha yakanyanyisa panguva yekuita, tsvina yakasara uye simbi catalysts muhurongwa ichaita yellowing.
Mhinduro inoshanda ndeyekuwedzera antioxidant uye ultraviolet absorber, iyo inogona kunyatsodzivirira uye kunonoka kutsvuka.Nekudaro, kune akawanda marudzi ema antioxidants, uye kusarudza zvigadzirwa zvakakodzera kunoda imwe tsigiro yehunyanzvi uye ruzivo rwekuunganidza.
Classification of antioxidants: imwe ndiyo huru antioxidant: tora peroxide mahara radicals, kunyanya kudziviswa phenol antioxidants;Imwe ndeye anobatsira antioxidant: decompose hydroperoxides, kunyanya phosphite esters uye thioesters.Kazhinji, akasiyana antioxidants anokurudzirwa zvinoenderana nemaitiro ekugadzira, mbishi zvinhu, zvinonyungudutsa, additives uye mafirita evagadziri vakasiyana-siyana, iyo nhanho yeyero uye chiyero cheyero.
Chiedza cheUltraviolet zvakare chikonzero chakakosha chinokonzera oxidation yellowing ye epoxy system, kunyanya kubva muchiedza chezuva.Naizvozvo, kunyanya kune vatengi vane zvigadzirwa zvinoda kushandiswa kunze, isu tichakurudzira kuwedzera imwe huwandu hweUV absorber kune zvigadzirwa, izvo zvinogona kunyatsotora UV uye kunonoka kutsvuka.Uyezve, kushandiswa kweultraviolet uye antioxidant kunogona kuita synergistic mhedzisiro, nemhedzisiro yekuti 1 kuwedzera 1 yakakura kupfuura 2.
Ehezve, kushandiswa kwe antioxidants uye ultraviolet absorbers haigone kugadzirisa dambudziko rekuyero, asi mukati meimwe siyana uye nguva, inogona kunyatso kudzivirira oxidation yero yezvigadzirwa, chengetedza ruvara rwemvura rwezvigadzirwa pachena uye kuvandudza giredhi rezvigadzirwa. .
Nguva yekutumira: Chivabvu-09-2022