Oligomers zidasanzwe z'imikorere

1.Oligomers zo mu bwoko bwa Dual-Cure

Niba oligomer irimo ubwoko bubiri butandukanye bw'amatsinda akora ku buryo bwo gukangura, urugero nk'itsinda rya acrylate rishobora gukangura mu buryo bwa free radical, n'irindi tsinda rishobora gukangura mu buryo bwa cationic, gukangura mu buryo bw'ubushyuhe, gukangura mu buryo bwa hydroxyl, cyangwa gukangura mu buryo bwa thermal, icyo gihe yitwa dual-cure oligomer.

Hakoreshejwe bisphenol. Resine ya epoxy na aside acrylic mu buryo bwo gusohora esterification [itsinda rya epoxy: itsinda rya carboxyl = (1.5 ~ 2.0): 1, ikigereranyo cya molar], hategurwa resine ya epoxy acrylate irimo amatsinda ya epoxy. Amatsinda ya acrylic ashobora kunyura muri polymerization ya free-radical, mu gihe amatsinda ya epoxy ashobora kunyura muri cationic photopolymerization cyangwa thermal curing. Ibyavuye mu bushakashatsi bigaragaza ko hari imikoranire hagati y’aya matsinda abiri akora, bishobora guteza imbere iterambere rya free-radical na cationic photopolymerization, bikongera cyane igipimo cy’impinduka n’igipimo cya nyuma cyo guhindura, mu gihe bigabanya cyane uburyo ogisijeni ikumirwa. Filimi yakuweho yakozwe na oligomer ebyiri igaragaza imiterere myiza ya mekanike.

Mu gukora hexamethylene diisocyanate hamwe na N,N-bis (3-aminopropyltriethoxysilane), hagakurikiraho gukora hamwe na hydroxyethyl acrylate, hashobora gutegurwa acrylate ya polyurethane yo mu bwoko bwa siloxane ifite ubushobozi bwo gufotora burimo radical ndetse n'uburyo bwo gufotora burimo ubushuhe. Ibi bishobora gukoreshwa mu gufotora gukonjesha.

Gutunganya resine za phenolic epoxy acrylate zirimo amatsinda ya epoxy bivamo ibikoresho bifite imikorere ya free-radical photocuring na thermal curing dual-cure, bishobora gukoreshwa mu buryo bwo gufotora bushobora gupimwa.

2.Aba-Oligomer biyitangira ubwabo

Hari ubwoko bubiri bwa oligomeri zifite imirimo yo kwitangira:

1. Oligomer ubwayo ifite ubushobozi bwo gukora fotoinitiating, bityo hakenewe kongerwamo fotoinitiator nke cyangwa nta n'imwe muri iyo formulaire.
2. Itsinda rikora fotoinitiating rishyirwa muri oligomer, rigahinduka photoinitiator ya macromolecular ikora nka oligomer ndetse na photoinitiator muri formulaire.

Ubwoko bwa mbere bwa oligomer yitangira ubwayo ni ibicuruzwa bishya byakozwe na sosiyete y’Abanyamerika Ashland. Bitegurwa binyuze mu buryo bwa Michael bwo kongeramo hagati ya esters nyinshi za acrylate na β-ketoesters (nk'ethyl acetoacetate, allyl acetoacetate, na 2-acetoacetoxyethyl methacrylate). Karuboni ya methylene ikora muri β-ketoester ikora isano nshya ya covalent hamwe na karuboni ya nyuma y'isano ya karuboni na karuboni ya acrylate. Itsinda rya karuboni muri β-ketoester rihujwe na atome ya karuboni yasimbuwe burundu. Iyi sano ntihindagurika neza munsi y'urumuri rwa ultraviolet. Nyuma yo kwinjiza urumuri rwa UV, iracika byoroshye, igakora radical ya acetyl free n'indi radical ya macromolecular free, bityo igatanga ubushobozi bwo kwitangira ubwayo.

Kubwibyo, mu gusiga irangi rya UV, wino, na kole byakozwe na oligomer zibyikorera, hakenewe fotoinitiateur nke cyangwa nta n'imwe ikenewe. Ibi birinda ibibazo nk'impumuro mbi, umuhondo, ingorane mu kuvanga, imvura, kwimuka, ndetse n'igiciro kinini kijyanye no kongeramo fotoinitiateur zisanzwe.

Oligomer zitangira kwiyamamaza zishobora kandi gutegurwa binyuze mu buryo butandukanye hagati ya esters zitandukanye za acrylate n'abatanga Michael batandukanye, bigatuma habaho urukurikirane rw'ibicuruzwa.

Ubwoko bwa akrilate burimo: akrilate, epoxy akrilate, polyurethane akrilate, polyester akrilate, silicone akrilate, melamine akrilate, perfluoroacrylate, fumarate, na maleate. Abatanga Michael barimo: β-ketoesters, β-diketones, β-ketoamides, β-ketoanilides, n'abandi. Itsinda rya R' mu batanga Michael rishobora kuba itsinda rikora cyangwa itsinda rivura indwara ebyiri.

Ubwoko bwa kabiri bwa oligomer yitangira ubwayo butegurwa ahanini hakoreshejwe hydroxyl-containing photoinitiators (nka benzoin, 1173, 184, 2959) hamwe na oligomer zirimo amatsinda ya isocyanate, bityo bigatera fotoinitiator kuri oligomer kugira ngo habeho fotoinitiator ya macromolecular hamwe n'itsinda ryitangira ryubatswemo.

Ibyiza bya oligomer za photoinitiator zashyizwe ku giti:

1. Igipimo cyo gufotora kiri hafi y’icyiciro cya oligomer zisanzwe zihujwe n’ibitera fotografiya bito.
2. Ihuza neza na sisitemu.
3. Igabanya cyane ubushobozi bwo kwimuka bw'icyuma gitanga urumuri.
4. Bigabanya gukora ibikoresho byangiza biva kuri photoinitiator (nk'imashini ikora fotografiya)
5. Igikoresho cyo gushushanya (photoinitiator) ntabwo kirimo uburozi kandi nta kibazo kirimo, bigatuma gikoreshwa mu gusiga no mu gupfunyika irangi mu gupfunyika ibiryo.

Amakuru agaragaza ko ibikoresho byo gushyiramo uduce tw’udu ...

3.Oligomers zo mu bwoko bwa Viscosity nkeya

Mu mpera z'ikinyejana cya 20, havutse ikoranabuhanga rishya ry’ibikoresho bishobora gufotorwa — gucapa inkjet ya UV —. Gucapa inkjet ni uburyo bwo gucapa budasaba ibyuma byo gucapa. Bukora amashusho bushyira ibitonyanga bya wino ku kintu runaka. Mu guhindura amashusho n'inyandiko binyuze muri mudasobwa no kugenzura umutwe w'icapiro kugira ngo ushyire ibitonyanga bya wino ku buryo bunonosoye, ni uburyo bwo gufata amashusho bwa digitale. Ubu ni bumwe mu buryo bwihuse bwo gufata amashusho ya digitale, butanga ibyiza byo gucapa igihe bikenewe, kwihuta cyane, ubwiza, n'amabara meza.

Ikoreshwa ry'ingenzi mu gucapa inki ya UV ni wino ya UV inkjet, isaba wino kugira ubukana buke, umuvuduko woroshye wo gushonga, ibara rihamye kandi ritagira imirasire.