Background technology
UV solidifies the advantage that ink-jet has combined UV curing technology and inkjet technology, and existing UV is solidificated in economical and technical advantage, also has inkjet technology and is using and operational facility, has the characteristic of extensive versatility.But jetting ink is not can be adsorbed on easily on the used base material, particularly glass.Because glass baseplate is the inorganic materials of atresia, and UV photo-curing ink-jet staple is an organic cpds, glass is difficult for being corroded, and it is inner that ink is difficult to infiltrate base material, so jetting ink is not easy to sprawl at glass surface, adhere firmly.
Printing (comprising ink jet printing) on glass baseplate both at home and abroad is earlier at pre-treatment (coating precoated layer to improve the sticking power of ink-jet to glass), impressing pattern, the spraying protective layer at last then of carrying out on glass.This process is complicated, and the solvent type not environmental protection coating material of great majority use, and a large amount of VOC volatilizations is arranged.
At present more to the research of the glass ink-jet of some common application scopes, disclose at normal temperatures the glass spray ink Printing on glass like Chinese patent CN101624492A, it is better to glass attachment power to have cured film, the characteristics that viscosity is little.But when UV ink-jet solidified glasswork contact with water, especially contact hot water after, sticking power variation, cured film be prone to from glassly come off, cracking etc.Be the UV cured film water tolerance on the solution glass baseplate and the problem of attachment fastness, prior art has been introduced following three kinds of methods: before ink-jet, apply the resin that strengthens sticking power earlier; Or behind photocuring, carry out curing process again; Or glass carried out modification.Specifically in patent WO2010/115858, reported the method for the sticking power of a kind of UV of enhancing ink-jet on glass baseplate like people such as Lecolle F.; Between cured layer and glass baseplate, add a kind of sticking power layer and glass coating; The sticking power layer includes epoxy resin; Melamine resins etc., glass coating then are the compsns of some MOXs.People such as MATSUSAWA M. have introduced in patent JP2009078531-A in interpolation on glass and have contained oxide compound cured layers such as benzophenone, styracin and titanium oxide, zinc oxide, and this cured layer helps improving the sticking power of UV ink-jet.People such as GRANT A. propose in patent WO 2009/118507 UV ink-jet spray printing behind glass baseplate and photocuring; Carry out thermofixation again; Thermofixation is meant that at a certain temperature (100~400 ℃) bake, and it is more complete that ink-jet is solidified, to reach the purpose that strengthens sticking power.Yet existing these method complicated operating process are also inconvenient on the technology.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of UV photo-curing ink-jet ink that can be applicable to glass baseplate is provided, this ink has good sticking power and high fastness on glass baseplate.
Another object of the present invention is to provide the said preparation method who is used for the UV photo-curing ink-jet ink of glass baseplate.
Above-mentioned purpose of the present invention is achieved through following technical scheme:
A kind of UV photo-curing ink-jet ink that is used for glass baseplate, form by the component of counting by weight percentage as follows:
Pigment 2~15%;
Reactive thinner 60~90%;
Living oligomer 2~10%;
Radical photoinitiator 3~10%
Cationic photoinitiator 2~10%;
Adhesion promoter 0.2~2%;
Auxiliary agent 0.5~5%;
Said reactive thinner is the mixture of being made up of single functionality monomer, difunctionality monomer and polyfunctionality monomer;
Said reactive thinner is the compsn of cationic reactive thinner and free radical activity thinner simultaneously;
Said living oligomer is the compsn of aliphatic urethane acrylate oligopolymer and origoester acrylate;
Said adhesion promoter is that general formula is R (CH
2)
nSiX
3Silane coupling agent, wherein, R is a vinyl, amido, epoxy group(ing), methacryloxy or sulfydryl; X is a methoxy or ethoxy, and n is 0~3;
Said auxiliary agent is dispersion agent, wetting agent and skimmer.
Described reactive thinner can be categorized as the single functionality monomer according to the number that contains polymerizable functional group in the molecule, difunctionality monomer, polyfunctionality monomer.
Here said functionality is meant the number of these two kinds of functional groups of epoxy group(ing) or carbon-carbon double bond.
As a kind of preferred version, said single functionality monomer is preferably isooctyl acrylate, cyclopropylene acid TriMethylolPropane(TMP); 3,3,5-trimethylcyclohexyl propenoate; Tetrahydrofurfuryl acrylate; Methoxy poly (ethylene glycol) list (methyl) propenoate, 1, any one or a few in 2-epoxy-4-vinyl cyclohexane or (R)-oxidation PC 560;
Said difunctionality monomer is preferably 1,6 hexanediol diacrylate, propylene glycol diacrylate; The third oxidation neopentylglycol diacrylate; 3,4-epoxycyclohexyl methyl 3,4-epoxycyclohexyl manthanoate; Titanium dioxide vinylcyclohexene or hexanaphthene-1, any one or a few in 2-dicarboxylicacid two (epoxy ethyl methyl) ester;
Said polyfunctionality monomer is preferably Viscoat 295, pentaerythritol triacrylate, any one or a few among double pentaerythritol C5 methacrylate or the propoxylation multi-functional acrylate.
Reactive thinner can be participated in photocuring reaction, thereby influences the laser curing velocity of ink-jet and the chemical property and the physicals of cured film; Also play dissolving in addition, the effect of dilution oligopolymer.Generally speaking, functional group's number is many more, and speed of response is fast more, but the ink-jet viscosity of preparation is also big more, so the dilution capacity of the high reactive thinner of functionality weakens.General ink-jet systems requires below 15mpas viscosity; As a kind of more preferably scheme; In the said reactive thinner; The monomeric weight of single functionality is preferably and accounts for 65~95% of reactive thinner weight; It is 1~22% that the monomeric weight of difunctionality is preferably what account for reactive thinner weight, and the monomeric weight of polyfunctionality is preferably and accounts for 1~15% of reactive thinner weight.
It is over half that the single functionality monomer accounts for the reactive thinner prescription, can guarantee that the viscosity of ink-jet is moderate, and the single functionality monomer is low owing to carbon-carbon double bond content, and volumetric shrinkage is few during curing, helps to improve sticking power; A small amount of high functionality monomer that adds can be accelerated curing speed and physicalies such as the sticking power that improves cured film, water tolerance.
Said living oligomer is the compsn of aliphatic urethane acrylate oligopolymer and origoester acrylate.Origoester acrylate has fabulous anti-xanthochromia ability, and all kinds of different substrate materials are all had sticking power preferably.In the aliphatic urethane acrylate molecule ammonia ester bond is arranged; Can between macromolecular chain, form various hydrogen bonds; Make cured film have excellent abrasive and snappiness, excellent combination property, the introducing of aliphatic chain helps improving weather resistance; Be used with propenoate, can increase its sticking power base material.But the physical strength of propenoate and hardness are all very low, and consumption can influence the performance of cured film too much.As a kind of preferred version, in the said living oligomer, the weight ratio of aliphatic urethane acrylate oligopolymer and origoester acrylate is preferably 2: 1~and 5: 1.
The present invention has adopted positively charged ion-radical to mix photocuring, promptly in same system, adopts positively charged ion and two kinds of dissimilar polyreactions of radical polymerization to make system solidified method.This method has combined the advantage of two kinds of polyreactions, utilizes free radical system inductive phase short and reach fast shaping, and the dark reaction of cationic system makes that system is thorough to be done; And utilize the little even generation expansible characteristics of cationic polymers volumetric shrinkage, remedy the fashionable volumetric shrinkage of radical polymerization, thereby strengthen the sticking power of jetting ink glass baseplate.
As a kind of preferred version; Said radical photoinitiator is preferably the 2-isopropyl thioxanthone, 2-benzyl-2-dimethylamino-1-(4-morpholinyl phenyl) butanone, phenyl two (2; 4; The 6-trimethylbenzoyl) phosphine oxide or 2,4, any one or a few in the 6-trimethylbenzoyl phenyl-phosphonic acid ethyl ester.
As a kind of preferred version, said cationic photoinitiator is preferably macromole evocating agent.Compare with the small molecules light trigger, the macromolecular photoinitiator volatility is less, and can solve the toxicity problem that solidifies back resin system residual light initiation fragment.
As a kind of preferred version, be preferably the salt compounded of iodine that contains polyurethanyl group in the said cationic photoinitiator, the structural formula of the said salt compounded of iodine that contains polyurethanyl group is suc as formula shown in (I):
Wherein, n is 8~18.
Because the introducing of polyurethanyl group has increased its stability to hydrolysis, the introducing of long aliphatic chain has increased the solvability of salt again greatly, and makes the maximum absorption wavelength red shift.
Also through adding adhesion promoter, promptly concrete general formula is R (CH in the present invention
2) n-Si-X
3Silane coupling agent solve the problem of ink-jet in adsorptive power difference on glass, the R group can form covalent linkage with organic constituent reaction; The X group can hydrolysis generate silanol group, and silanol group and glass surface form siliconoxygen bond, thereby organic constituent and inorganic materials are closely linked together through chemical bond, have strengthened ink-jet at sticking power on glass.
As a kind of preferred version; Said silane coupling agent is preferably 3-(2,3-epoxy third oxygen) propyl trimethoxy silicane, vinyltriethoxysilane; 3-(methacryloxypropyl) propyl trimethoxy silicane, 3-aminopropyltriethoxywerene werene or 3-sulfydryl propyl-triethoxysilicane.
Usually, existing UV photo-curing ink-jet ink is applicable to common unorganic glass, and glass baseplate according to the invention can be common unorganic glass, can also be the glass with special purpose; As a kind of preferred version, said glass baseplate is preferably sun power sytull or colour display screen glass substrate.
The said preparation method who is used for the UV nanometer jetting ink of glass baseplate; Comprise the steps: earlier living oligomer, dispersion agent, part reactive thinner and pigment behind stirring 0.5~1h impeller under; Then it is sent in the sand mill and grind, after its median size of the compound that contains pigment is less than 300nm, emit; Mix with other component in the prescription with the reactive thinner of remainder again; Be uniformly dispersed through clarifixator, through 0.45 micron membrane filtration, promptly make the UV photo-curing ink-jet ink that is used for glass baseplate at last.
The present invention mixes photocuring system through adopting positively charged ion-radical; Select suitable activity thinner and living oligomer; Interpolation can promote the silane coupling agent of sticking power to improve attachment fastness and the water tolerance of jetting ink to glass baseplate, reaches the purpose of straight fully spray.Be about to adopt UV photo-curing ink-jet machine directly UV nanometer jetting ink according to the invention to be beaten on glass baseplate; And be cured at once; Need before ink-jet, not apply the sticking power layer in advance, need be not armor coated on UV ink-jet cured layer yet, so just can simplify production process widely.
Compared with prior art, the present invention has following beneficial effect:
The present invention has adopted positively charged ion-radical to mix photocuring, promptly in same system, adopts positively charged ion and two kinds of dissimilar polyreactions of radical polymerization to make system solidified method; This method has combined the advantage of two kinds of polyreactions, utilizes free radical system inductive phase short and reach fast shaping, and the dark reaction of cationic system makes that system is thorough to be done; And utilize the little even generation expansible characteristics of cationic polymers volumetric shrinkage, remedy the fashionable volumetric shrinkage of radical polymerization, thereby strengthen the sticking power of jetting ink glass baseplate; Said UV photo-curing ink-jet ink can be realized straight spray, need not pre-treatment is carried out on the glass baseplate surface, and construction technology is simple, and has good attachment fastness and water tolerance.
Embodiment
Below in conjunction with specific embodiment the present invention is further explained, but specific embodiment is not done any qualification to the present invention.
Embodiment 1
The raw material and the proportioning of the red UV nanometer of the used preparation of present embodiment jetting ink are as shown in table 1:
The raw material and the proportioning of the red UV nanometer of table 1 preparation jetting ink
According to said prescription of table 1 and consumption; Earlier with aliphatic urethane acrylate UA 9030 v oligopolymer, pure acrylic acid ester 6584N oligopolymer, methoxy poly (ethylene glycol) mono acrylic ester reactive thinner, pinkish red Meganta 176 pigment, Dispers 685 dispersion agents and Airex 900 skimmers behind stirring 0.5h impeller under; Then the gained compound is sent in the sand mill and ground; After the median size that is ground to compound is less than 300nm; Emit, mix with reactive thinner, free radical photo-initiation, cation light initiator and Wet 270 wetting agents of remainder again, disperse secondary through clarifixator; Use 0.45 micron membrane filtration at last, make pinkish red UV photo-curing ink-jet ink.
The pinkish red UV photo-curing ink-jet ink of embodiment 1 preparation, median size is 254nm, uses the S61 rotor of Brookfield viscometer DV-II to record 25 ℃ of following viscosity and is 7.32mpas.The product that embodiment 1 is made is painted on the sytull, complete photocuring under UV-irradiation then, and the pencil hardness of its cured film is 3H; And, do not come off attachment fastness 100% with 3M tape stripping film according to the GB/T 13217.7-2009 liquid ink attachment fastness method of inspection; 250 ℃ bake not xanthochromia of 1h film, do not chap; 35 ℃ of warm water soaking 1h cured film do not come off, do not whiten.
Embodiment 2
The raw material and the proportioning of the blue UV photo-curing ink-jet of the used preparation of present embodiment ink are as shown in table 2:
The raw material and the proportioning of the blue UV photo-curing ink-jet ink of table 2 preparation
According to said prescription of table 2 and consumption; Earlier with aliphatic urethane acrylate oligopolymer UA 9033 v, pure acrylic acid ester 6533B-40 oligopolymer, 3; 3,5-trimethylcyclohexyl propenoate reactive thinner, methoxy poly (ethylene glycol) mono acrylic ester reactive thinner, blue Cyan15:3 pigment, Dispers 680 dispersion agents and FoamexN skimmer stir 0.5h under impeller after, the gained compound is sent in the sand mill ground then; After the median size that is ground to compound is less than 300nm; Emit, mix with reactive thinner, free radical photo-initiation, cation light initiator and BYK 3510 wetting agents of remainder again, disperse secondary through clarifixator; Use 0.45 micron membrane filtration at last, make blue UV photo-curing ink-jet ink.
The blue UV photo-curing ink-jet ink of embodiment 2 preparation, median size is 269nm, uses the S61 rotor of Brookfield viscometer DV-II to record 25 ℃ of following viscosity and is 8.84mpas.The product that embodiment 2 is made is painted on the sytull, complete photocuring under UV-irradiation then, and the pencil hardness of its cured film is 3H; And, do not come off attachment fastness 100% with 3M tape stripping film according to the GB/T 13217.7-2009 liquid ink attachment fastness method of inspection; 250 ℃ bake not xanthochromia of 1h film, do not chap; 35 ℃ of warm water soaking 1h cured film do not come off, do not whiten.
Embodiment 3
The raw material and the proportioning of the used preparation black of present embodiment UV photo-curing ink-jet ink are as shown in table 3:
The raw material and the proportioning of table 3 preparation black UV photo-curing ink-jet ink
According to said prescription of table 3 and consumption; Earlier with aliphatic urethane acrylate UA 19T oligopolymer, pure acrylic acid ester DR-A801 oligopolymer, 3; 3,5-trimethylcyclohexyl propenoate, pentaerythritol triacrylate, black Black 7 pigment, BYK 168 dispersion agents and BYK 067A skimmer stir 0.5h under impeller after, the gained compound is sent in the sand mill ground then; After the median size that is ground to compound is less than 300nm; Emit, mix with reactive thinner, free radical photo-initiation, cation light initiator and BYK 3500 wetting agents of remainder again, disperse secondary through clarifixator; Use 0.45 micron membrane filtration at last, make black UV photo-curing ink-jet ink.
The black UV photo-curing ink-jet ink of embodiment 3 preparation, median size is 273nm, uses the S61 rotor of Brookfield viscometer DV-II to record 25 ℃ of following viscosity and is 6.62mpas.The product that embodiment 3 is made is painted on the sytull, complete photocuring under UV-irradiation then, and the pencil hardness of its cured film is 3H; And, do not come off attachment fastness 100% with 3M tape stripping film according to the GB/T 13217.7-2009 liquid ink attachment fastness method of inspection; 250 ℃ bake not xanthochromia of 1h film, do not chap; 35 ℃ of warm water soaking 1h cured film do not come off, do not whiten.