MaOligomers Akakosha Ekushanda

1.MaOligomers Anoporesa Kaviri

Kana oligomer iine mhando mbiri dzakasiyana dzemapoka anoshanda ekurapa, senge boka reacrylate rinogona kurapwa ne free-radical, uye rimwe boka rinogona kurapwa ne cationic photocuring, moisture curing, hydroxyl curing, kana thermal curing, saka inonzi dual-cure oligomer.

Uchishandisa bisphenol A epoxy resin uye acrylic acid mu ring-opening esterification reaction [epoxy group: carboxyl group = (1.5 ~ 2.0): 1, molar ratio], epoxy acrylate resin ine epoxy groups inogadzirwa. Mapoka e acrylic anogona kupinda free-radical polymerization, nepo mapoka e epoxy anogona kupinda cationic photopolymerization kana thermal curing. Zvakawanikwa pakutsvaga zvinoratidza kuti pane intramolecular interaction pakati pemapoka maviri aya anoshanda, izvo zvinogona kukurudzira kufambira mberi kwe free-radical uye cationic photopolymerization, zvichivandudza zvakanyanya reaction rate uye final conversion rate, ukuwo zvichideredza zvakanyanya oxygen inhibition. Firimu rakagadziriswa rakaumbwa ne dual-cure oligomers rinoratidza hunhu huri nani hwemakanika.

Nekuita hexamethylene diisocyanate neN,N-bis(3-aminopropyltriethoxysilane), zvichiteverwa nekuita nehydroxyethyl acrylate, siloxane-type polyurethane acrylate ine free-radical photocuring uye moisture-curing dual-cure properties inogona kugadzirwa. Izvi zvinogona kushandiswa mu phototherapy conformal coatings.

Kugadzirwa kwemaresini e-phenolic epoxy acrylate ane mapoka e-epoxy kunoita kuti pave nezvinhu zvine mabasa ekugadzira mifananidzo (free-radical photocuring) uye ekugadzirisa thermal dual-cure, izvo zvinogona kushandiswa mukudzivirira kuputika kwemvura (photoimageable solder resists).

2.MaOligomers Anozvitangira

Kune mhando mbiri dzema oligomers ane mabasa ekuzvitanga:

1. Iyo oligomer pachayo ine kugona kwekugadzira photoinitiating, saka hapana kana chimwe chinhu chinofanira kuwedzerwa mukugadzira photoinitiator.
2. Boka rekugadzira mifananidzo rinosanganiswa muoligomer, richirishandura kuita macromolecular photoinitiator inoshanda seoligomer uye sephotoinitiator mukugadzirwa kwacho.

Rudzi rwekutanga rweoligomer inozvitanga chigadzirwa chitsva chakagadzirwa nekambani yekuAmerica yeAshland. Inogadzirwa kuburikidza neMichael addition reaction pakati pe multifunctional acrylate esters ne β-ketoesters (senge ethyl acetoacetate, allyl acetoacetate, uye 2-acetoacetoxyethyl methacrylate). Active methylene carbon iri mu β-ketoester inoumba covalent bond itsva ne terminal carbon-carbon double bond ye acrylate. Boka re carbonyl riri mu β-ketoester rakabatana ne carbon atom yakatsiviwa zvizere. Chisungo ichi hachina kugadzikana pasi pe ultraviolet light. Mushure mekunwa UV light, inopwanyika nyore nyore, ichigadzira acetyl free radical uye imwe macromolecular free radical, nokudaro ichipa kugona kwekuzvitanga.

Saka, muUV coatings, inki, uye manamatisi akagadzirwa neOligomers dzinozvitangira, hapana kana chimwe chinhu chinodiwa. Izvi zvinodzivirira matambudziko akadai sekunhuwa, kutsvuka, kuoma kwekusanganisa, kunaya kwemvura, kufamba, uye mitengo yakakwira inokonzerwa nekuwedzera maphotoinitiators echinyakare.

Maoligomer anozvitangira anogonawo kugadzirwa kuburikidza nekuita pakati pemaester akasiyana-siyana eacrylate nevanopa Michael vakasiyana-siyana, zvichigadzira zvigadzirwa zvakasiyana-siyana.

Mhando dzeacrylate dzinosanganisira: acrylate, epoxy acrylate, polyurethane acrylate, polyester acrylate, silicone acrylate, melamine acrylate, perfluoroacrylate, fumarate, uye maleate. Vapi veMichael vanosanganisira: β-ketoesters, β-diketones, β-ketoamides, β-ketoanilides, nezvimwewo. Boka reR' riri muMichael donor rinogona kuva boka rinoshanda kana boka rine miviri yekurapa.

Rudzi rwechipiri rweoligomer inozvitanga inogadzirwa zvakanyanya nekushandisa maphotoinitiators ane hydroxyl (akadai sebenzoin, 1173, 184, 2959) nemaoligomers ane ma isocyanate groups, nokudaro vachibatanidza photoinitiator paoligomer kuti vagadzire macromolecular photoinitiator ine boka rekutanga rakavakirwa mukati.

Mabhenefiti emafuta ekugadzira photoinitiator akabatanidzwa:

1. Mwero wekupora kwemifananidzo wakafanana newema oligomer akajairwa pamwe chete nema photoinitiators madiki emamorekuru.
2. Kuenderana kwakanaka nehurongwa.
3. Zvinonyanya kuderedza kugona kwemuchina wekutora mifananidzo.
4. Inoderedza kugadzirwa kwezvinhu zvinokuvadza zvinoora kubva muchinhu chinogadzira photo (senge benzaldehyde).
5. Muchina wekugadzira mifananidzo hauna chepfu uye haukuvadzi, zvichiita kuti ukwanise kushandiswa mukupenda neingi dzekugadzira chikafu.

Data rinoratidza kuti zvigadzirwa zvekugadzira mafotoinitiator zvinoderedza zvakanyanya kufamba nekubuda kwezvidimbu zvekutanga, uye huwandu hwebenzaldehyde hunogadzirwa mufirimu yakacheneswa hunoderedzwawo zvakanyanya. Nokudaro, kugadzira mafotoinitiator pamafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta, zvichichinja zvachose tsika yekare apo ma-inki eUV nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta anogadzirwa nemafuta, uye zvichivhura nzvimbo itsva yekushandiswa kweinki yeUV nemafuta anogadzirwa ...

3.MaOligomers Akaderera-Kusimba

Pakupera kwezana remakore rechi20, tekinoroji itsva yezvinhu zvinokwanisa kutorwa nemifananidzo — UV inkjet printing — yakabuda. Inkjet printing inzira yekudhinda isingabatanidzi maplate ekudhinda. Inogadzira mifananidzo nekuburitsa madonhwe einki pa substrate. Nekugadzirisa mifananidzo nemagwaro kuburikidza nekombuta uye kudzora musoro wekudhinda kuti uburitse madonhwe einki nemazvo, inzira yekufungidzira yedhijitari yakazara. Parizvino ndeimwe yenzira dzekufungidzira dzedhijitari dziri kukura nekukurumidza, dzichipa mabhenefiti ekudhinda kuri kudiwa, kumhanya kwakanyanya, mhando yepamusoro, uye mavara anopenya.

Chinhu chikuru chinoshandiswa pakudhinda inki yeUV inki yeUV, iyo inoda kuti inki ive ne viscosity yakaderera, inokurumidza kupora, igare yakagadzikana, uye isina kusvibiswa.