Kutanga kweUV absorber

Chiedza chezuva chine ultraviolet yakawanda inokuvadza zvinhu zvine mavara. Kureba kwayo kunosvika 290 ~ 460nm. Aya anokuvadza ultraviolet mwaranzi anoita kuti mamorekuru eruvara aore uye kupera kuburikidza nemakemikari oxidation-kuderedza maitiro. Kushandiswa kwema ultraviolet absorbers kunogona kudzivirira kana kuderedza kukuvadza kwemirairo ye ultraviolet kune zvinhu zvakachengetedzwa.

UV absorber inogadzika mwenje inogona kutora iyo ultraviolet chikamu chechiedza chezuva uye fluorescent mwenje masosi pasina kuzvishandura. Plastics nezvimwe zvinhu zvepolymer zvinogadzira auto-oxidation reactions pasi pezuva uye fluorescence nekuda kwekuita kwe ultraviolet mwaranzi, izvo zvinotungamira mukuora uye kuparara kwemapolymers, uye kuderera kwechitarisiko uye michina zvinhu. Mushure mekuwedzera maAbsorbitors eUV, iyi yakakwira-simba ultraviolet mwenje inogona kunyudzwa zvakasarudzika, ichishandura kuita simba risingakuvadzi uye kuburitswa kana kupedzwa. Nekuda kwemhando dzakasiyana dzemapolymers, iwo wavelengths emirairo yeultraviolet inokonzeresa kuti ishatise zvakare akasiyana. Yakasiyana UV inopinza inogona kutora ultraviolet mwaranzi yeakasiyana wavelengths. Paunenge uchishandisa, zvinotora UV zvinofanirwa kusarudzwa zvinoenderana nerudzi rwepolymer.

Mhando dzeUV absorber

Mhando dzakajairwa dzeUV absorbers dzinosanganisira: benzotriazole (sengeUV absorber 327), benzophenone(sengeUV absorber 531), triazine(sengeUV absorber 1164), uye kutadzisa amine(sengeLight Stabilizer 622).

Benzotriazole UV absorbers pari zvino ndiyo inonyanya kushandiswa zvakasiyana-siyana muChina, asi mashandisirwo etriazine UV absorbing ari nani kupfuura aya ebenzotriazole. Triazine absorbers ane yakanakisa UV absorption zvivakwa uye zvimwe zvakanakira. Iwo anogona kushandiswa zvakanyanya mumapolymers, ane yakanakisa kupisa kugadzikana, yakanaka kugadzirisa kugadzikana, uye asidi kuramba. Mumashandisirwo anoshanda, triazine UV absorbers ine yakanaka synergistic mhedzisiro ine inodzivirira amine light stabilizers. Kana iyo miviri yakashandiswa pamwe chete, ine mhedzisiro iri nani pane iyo inoshandiswa yoga.

Mazhinji anowanzoonekwa UV absorbers

(1)UV-531
Chiedza cheyero kana chichena checrystalline poda. Density 1.160g/cm³ (25℃). Kunyungudika 48 ~ 49 ℃. Soluble muacetone, benzene, ethanol, isopropanol, zvishoma soluble mu dichloroethane, isinganyunguriki mumvura. Solubility mune zvimwe zvinonyungudutsa (g/100g, 25℃) is acetone 74, benzene 72, methanol 2, ethanol (95%) 2.6, n-heptane 40, n-hexane 40.1, mvura 0.5. Semuvharidzi weUV, inokwanisa kubata mwenje weultraviolet zvine huremu hwe270 ~ 330nm. Inogona kushandiswa mumapurasitiki akasiyana-siyana, kunyanya polyethylene, polypropylene, polystyrene, ABS resin, polycarbonate, polyvinyl chloride. Iyo ine kuenderana kwakanaka nemaresheni uye yakaderera volatility. Iyo yakawanda dosage ndeye 0.1% ~ 1%. Iine yakanaka synergistic effect kana yakashandiswa nehuwandu hushoma hwe4,4-thiobis (6-tert-butyl-p-cresol). Ichi chigadzirwa chinogona zvakare kushandiswa sechiedza stabilizer kune akasiyana machira.

(2)UV-327
Semushonga weUV, maitiro nemashandisirwo ayo akafanana neebenzotriazole UV-326. Inogona kusveta zvakanyanyisa ultraviolet rays ine wavelength ye270 ~ 380nm, ine yakanaka kugadzikana kwemakemikari uye kuderera kwakanyanya. Iine kuenderana kwakanaka ne polyolefins. Inonyanya kukodzera polyethylene uye polypropylene. Mukuwedzera, inogonawo kushandiswa ku polyvinyl chloride, polymethyl methacrylate, polyoxymethylene, polyurethane, unsaturated polyester, ABS resin, epoxy resin, cellulose resin, etc. Ichi chigadzirwa chine simba rakanakisisa rekudzivisa kupisa kwepasi, kushambidzika kwekugeza, gasi kupera kwekudzivirira uye kuchengetedza pfuma. Iyo ine yakakosha synergistic mhedzisiro kana ichishandiswa pamwe chete ne antioxidants. Inoshandiswa kuvandudza thermal oxidation kugadzikana kwechigadzirwa.

(3)UV-9
Chiedza cheyero kana chichena checrystalline poda. Density 1.324g/cm³. Kunyungudika 62 ~ 66 ℃. Kubikira nzvimbo 150 ~ 160 ℃ (0.67kPa), 220 ℃ (2.4kPa). Soluble mune zvakawanda organic solvents senge acetone, ketone, benzene, methanol, ethyl acetate, methyl ethyl ketone, ethanol, asi isinganyungudika mumvura. Solubility mune zvimwe zvinonyungudutsa (g/100g, 25℃) is solvent benzene 56.2, n-hexane 4.3, ethanol (95%) 5.8, carbon tetrachloride 34.5, styrene 51.2, DOP 18.7. Sevhavha yeUV, inokodzera mapurasitiki akasiyana-siyana akadai sepolyvinyl chloride, polyvinylidene chloride, polymethyl methacrylate, unsaturated polyester, ABS resin, cellulose resin, nezvimwewo. Iyo yakanyanya kunyura wavelength range ndeye 280 ~ 340nm, uye iyo yakawanda dosage% ~ 1.51%. Iine kugadzikana kwakanaka kwekupisa uye haina kuora pa200 ℃. Ichi chigadzirwa hachitore chiedza chinooneka, saka chakakodzera kune mwenje-ruvara-pachena zvigadzirwa. Ichi chigadzirwa chinogona zvakare kushandiswa mupendi uye synthetic rubber.