Nhanganyaya

Maantioxidant (kana kuti zvinosimbisa kupisa) zvinhu zvinoshandiswa kudzivirira kana kunonotsa kuparara kwemapolymer nekuda kweokisijeni kana ozone mumhepo. Ndiwo anonyanya kushandiswa muzvinhu zvepolymer. Mapendi anozora mafuta mushure mekubikwa pakupisa kwakanyanya kana kuvhenekerwa nezuva. Zvinhu zvakaita sekukwegura uye kuita yero zvinokanganisa zvakanyanya chitarisiko nekushanda kwechigadzirwa. Kuti zvidzivise kana kuderedza kuitika kwemaitiro aya, maantioxidant anowanzo kuwedzerwa.

Kuora kwemafuta epolymers nekuda kwekupisa kunonyanya kukonzerwa nekuita kwefree radicals kubva mumhando yechain-type inotangwa nefree radicals inogadzirwa nehydroperoxides kana yapiswa. Kuora kwemafuta epolymers kuburikidza nekupisa kunogona kudziviswa nekutora mafree radicals uye kuora kwehydroperoxide, sezvakaratidzwa mumufananidzo uri pazasi. Pakati pawo, maantioxidants anogona kudzivirira oxidation iri pamusoro uye saka anoshandiswa zvakanyanya.

Mhando dze antioxidants

Mishonga Inorwisa Mabhakitiriyazvinogona kukamurwa kuita zvikamu zvitatu zvichienderana nemabasa azvo (kureva, kupindira kwazvo mukuita kwemakemikari e auto-oxidation):

cheni inogumisa ma antioxidants: anonyanya kubata kana kubvisa ma free radicals anokonzerwa ne polymer auto-oxidation;

hydroperoxide inoparadza ma antioxidants: inonyanya kukurudzira kuora kwe hydroperoxides mu polymers;

maion esimbi anobvisa ma antioxidants: anogona kugadzira ma chelates akagadzikana ane maion esimbi anokuvadza, nokudaro achibvisa simba re catalytic remaion esimbi pa auto-oxidation process yema polymers.

Pakati pemhando nhatu dzema antioxidants, ma antioxidants anopedza cheni anonzi ma primary antioxidants, anonyanya kuvharirwa phenols uye secondary aromatic amines; mamwe marudzi maviri anonzi ma assixival antioxidants, anosanganisira phosphites uye dithiocarbamate metal salts. Kuti pave ne coating yakasimba inosangana nezvinodiwa zvekushandisa, musanganiswa wema antioxidants akawanda unowanzo sarudzwa.

Kushandiswa kwe antioxidants mu coatings

1. Inoshandiswa mu alkyd, polyester, unsaturated polyester
Muzvikamu zvine mafuta zvealkyd, mune mabhondi maviri kusvika padanho rakasiyana. Mabhondi maviri chete, mabhondi maviri akawanda, uye mabhondi maviri akabatana zvinogadziriswa zviri nyore kuti zvigadzire maperoxide pakupisa kwakanyanya, zvichiita kuti ruvara ruve rwakasviba, nepo ma antioxidants achigona kuora mahydroperoxides kuti ruvara ruve rwakajeka.

2. Inoshandiswa mukugadzirwa kwePU kuporesa agent
Mushonga wePU unowanzoreva prepolymer ye trimethylolpropane (TMP) uye toluene diisocyanate (TDI). Kana resin ikaiswa pakupisa nechiedza panguva yekugadzira, urethane inoora kuita maamine nemaolefins uye inotyora cheni. Kana amine iri yezvinonhuwira, inooxidized kuti ive quinone chromophore.

3. Kushandiswa mu thermosetting powder coatings
Inodzivirira ganda kubva mukuora kwemafuta panguva yekugadzirisa, kupora, kupisa, nezvimwe zvinhu. Mashandisirwo anosanganisira polyester epoxy, blocked isocyanate TGIC, TGIC substitutes, linear epoxy compounds uye thermosetting acrylic resins.

Nanjing Reborn New Materials inopa mhando dzakasiyana dzemishonga inorwisa mabhakitiriyayepurasitiki, coating, uye rabha maindasitiri.

Nekuvandudzwa uye kufambira mberi kweindasitiri yezvekuputira, kukosha kwezvekuputira zvema antioxidants kuchave pachena, uye nzvimbo yekukura ichave yakakura. Mune ramangwana, ma antioxidants achakura akananga kune huwandu hwakawanda hwemamorekuru, mashandiro akawanda, kushanda kwepamusoro, hutsva, kusanganiswa, kupindura uye kuchengetedzwa kwezvakatipoteredza zvakasvibira. Izvi zvinoda kuti vashandi vaite tsvakiridzo yakadzama kubva kune ese maitiro uye mashandisirwo kuti varambe vachivandudza, vaite tsvakiridzo yakadzama pamusoro pehunhu hwema antioxidants, uye vawedzere kugadzira ma antioxidants matsva uye anoshanda zvichibva pane izvi, izvo zvichave nemhedzisiro yakakura pakugadzirisa nekushandisa indasitiri yezvekuputira. Ma antioxidants ezvekuputira achawedzera kushandisa kugona kwawo kukuru uye kuunza mabhenefiti akanaka ehupfumi netekinoroji.