Othandizira owongoleraZomwe zimagwiritsidwa ntchito popaka nthawi zambiri zimagawidwa kukhala zosungunulira zosakanikirana, acrylic acid, silikoni, ma polima a fluorocarbon ndi cellulose acetate. Chifukwa cha mawonekedwe ake otsika kwambiri, othandizira owongolera sangangothandiza ❖ kuyanika kuti akhale mulingo, komanso angayambitse mavuto. Mukagwiritsidwa ntchito, chofunikira kwambiri ndizovuta zoyipa za othandizira owongolera pakubwezeretsanso komanso anti-cratering properties za zokutira, komanso kuyanjana kwa omwe amasankhidwa owongolera kuyenera kuyesedwa kudzera muzoyeserera.

1. Wosakaniza zosungunulira kusanja wothandizira

Amapangidwa ndi zosungunulira za hydrocarbon zotentha kwambiri, ma ketoni, esters kapena zosungunulira zabwino kwambiri zamagulu osiyanasiyana ogwira ntchito, komanso zosakaniza zosungunulira zotentha kwambiri. Pokonzekera ndi kugwiritsa ntchito, chidwi chiyenera kulipidwa pa kusinthasintha kwake, kusungunuka bwino ndi kusungunuka, kotero kuti zokutira zimakhala ndi zosungunulira zowonongeka komanso zowonongeka panthawi yowumitsa. Ngati chiwerengero cha volatilization chili chochepa kwambiri, chimakhalabe mufilimu ya utoto kwa nthawi yaitali ndipo sichikhoza kumasulidwa, chomwe chidzakhudza kuuma kwa filimu ya utoto.

Mtundu woterewu umangoyenera kuwongolera zolakwika (monga kuchepa, kuyera, ndi kusawala bwino) komwe kumachitika chifukwa cha kuyanika mwachangu kwa zosungunulira zokutira komanso kusungunuka kosakwanira kwa zinthu zoyambira. Mlingo nthawi zambiri ndi 2% ~ 7% ya utoto wonse. Idzatalikitsa nthawi yowuma ya zokutira. Kwa zokutira zowumitsa kutentha m'chipinda (monga utoto wa nitro) womwe umakonda kugwedezeka ukagwiritsidwa ntchito pa facade, sikuti umangothandiza kuwongolera, komanso umathandizira kukonza gloss. Pa kuyanika ndondomeko, angathenso kupewa zosungunulira thovu ndi pinholes chifukwa mofulumira evaporation wa zosungunulira. Makamaka ikagwiritsidwa ntchito pansi pa kutentha kwambiri komanso nyengo yachinyezi, imatha kuletsa filimu ya utoto kuti isaume msanga, imapatsa yunifolomu yosungunulira kugwedezeka, ndikuletsa kuchitika kwa chifunga choyera mu utoto wa nitro. Mtundu woterewu umagwiritsidwa ntchito limodzi ndi othandizira ena.

2. Acrylic leveling agents

Wothandizira wamtunduwu nthawi zambiri amakhala copolymer wa acrylic esters. Makhalidwe ake ndi awa:

(1) The alkyl ester wa acrylic acid amapereka maziko ntchito pamwamba;

(2) Iye−COO,−oh, ndi−NR ikhoza kuthandizira kusintha kuyanjana kwa kapangidwe ka alkyl ester;

(3) Kulemera kwa mamolekyu kumakhudzana mwachindunji ndi ntchito yomaliza yofalitsa. Kugwirizana kofunikira komanso kasinthidwe ka unyolo wa polyacrylate ndizofunikira kuti mukhale wothandizira woyenera. Kuthekera kwake kukweza limagwirira kumawonekera makamaka pambuyo pake;

(4) Imawonetsa anti-foaming ndi defoaming katundu mu machitidwe ambiri;

(5) Malingana ngati pali magulu ang'onoang'ono omwe akugwira ntchito (monga -OH, -COOH) muzitsulo zowonongeka, zotsatira za kubwezeretsanso zimakhala zosaoneka bwino, komabe pali mwayi wokhudza kubwezeretsanso;

(6) Palinso vuto lofananitsa polarity ndi kugwirizanitsa, zomwe zimafunanso kusankha koyesera.

3. Silicone leveling agent

Silicones ndi mtundu wa polima wokhala ndi silicon-oxygen bond chain (Si-O-Si) monga mafupa ndi magulu achilengedwe omwe amamangiriridwa ku maatomu a silicon. Mitundu yambiri ya silikoni imakhala ndi maunyolo am'mbali okhala ndi mphamvu zochepa, kotero mamolekyu a silikoni amakhala ndi mphamvu zotsika kwambiri komanso zotsika kwambiri.

Chowonjezera chogwiritsidwa ntchito kwambiri cha polysiloxane ndi polydimethylsiloxane, yomwe imadziwikanso kuti methyl silicone mafuta. Kugwiritsidwa ntchito kwake kwakukulu ndi monga defoamer. Zitsanzo zotsika kwambiri zolemetsa ma molekyulu ndizothandiza kwambiri polimbikitsa kusanja, koma chifukwa cha zovuta zofananira, nthawi zambiri zimakhala zocheperako kapena kulephera kuyambiranso. Chifukwa chake, polydimethylsiloxane iyenera kusinthidwa isanagwiritsidwe ntchito moyenera komanso moyenera pakupaka.

Njira zazikulu zosinthira ndi: silicone yosinthidwa ya polyether, alkyl ndi silikoni yosinthidwa yamagulu ena, silikoni yosinthidwa ya polyester, silikoni yosinthidwa ya polyacrylate, silikoni yosinthidwa ya fluorine. Pali njira zambiri zosinthira za polydimethylsiloxane, koma zonsezo zimapangidwira kuti zigwirizane ndi zokutira.

Mtundu woterewu wowongolera nthawi zambiri umakhala ndi zotsatira zowongolera komanso zotsitsa. Kugwirizana kwake ndi zokutira kuyenera kutsimikiziridwa kupyolera mu mayesero musanagwiritse ntchito.

4.Mfundo zazikuluzikulu zogwiritsira ntchito

Sankhani mtundu woyenera: Sankhani choyimira choyenera molingana ndi mtundu ndi zofunikira za zokutira. Posankha wothandizira wowongolera, kapangidwe kake ndi katundu wake komanso kugwirizana kwake ndi zokutira zokha ziyenera kuganiziridwa; nthawi yomweyo, zowongolera zosiyanasiyana kapena zowonjezera zina nthawi zambiri zimagwiritsidwa ntchito pophatikizana kuti zithetse nkhani zosiyanasiyana.

Samalani ndi kuchuluka komwe kwawonjezeredwa: kuwonjezera kwambiri kumayambitsa zovuta monga kutsika ndi kutsika pamwamba pa zokutira, pomwe kuwonjezera pang'ono sikungakwaniritse zotsatira zake. Kawirikawiri, ndalama anawonjezera ayenera anatsimikiza kutengera mamasukidwe akayendedwe ndi kusanja zofunika ❖ kuyanika, kutsatira malangizo ntchito reagent, ndi kuphatikiza zotsatira zenizeni mayeso.

Njira yokutira: Kuyika kwazitsulo kumakhudzidwa ndi njira yokutira. Mukamagwiritsa ntchito chowongolera, mutha kugwiritsa ntchito burashi, zokutira zogudubuza kapena kupopera mbewu mankhwalawa kuti mupereke gawo laothandizira.

Kugwedeza: Mukamagwiritsa ntchito chowongolera, utoto uyenera kugwedezeka mokwanira kuti chowongoleracho chibalalitsidwe mofanana mu utoto. Nthawi yosonkhezera iyenera kutsimikiziridwa molingana ndi mawonekedwe a wowongolera, nthawi zambiri osapitilira mphindi 10.

Nanjing Reborn New Materials amapereka zosiyanasiyanama leveling agentskuphatikizapo Organo Silicone ndi Zopanda silicon kuti zokutira. Kufananiza mndandanda wa BYK.