Summary of the invention
The invention provides a kind of using visible light light source irradiation and cause that solidified contains the composition of light trigger, can replace existing ultraviolet light polymerization product, can extensively be used in the big area indoor and outdoor coating project in addition.
The invention provides a kind of like this visible light curable compositions, it comprises:
(1) at least a prepolymer that contains alkene class unsaturated group of 30-75% by weight;
(2) at least a monomer that contains alkene class unsaturated group of 20-65% by weight;
(3) at least a radical photoinitiator of 1-10% or radical photoinitiator and aided initiating by weight;
(4) auxiliary agent of 0-20% by weight.
In preferred embodiments, adopt the combination of radical photoinitiator and aided initiating in the component (3).
Detailed Description Of The Invention
Specifically, the invention provides a kind of visible light curable compositions, it comprises:
(1) at least a prepolymer that contains alkene class unsaturated group of 30-75% by weight;
(2) at least a monomer that contains alkene class unsaturated group of 20-65% by weight;
(3) at least a radical photoinitiator of 1-10% or radical photoinitiator and aided initiating by weight;
(4) auxiliary agent of 0-20% by weight.
Prepolymer that contains alkene class unsaturated group in can the composition by visible-light curing of the present invention and monomer are can polymerization under free radical causes and solidified material.Suitable this class prepolymer and the monomer that uses is well-known in the art.
The example of component (1) prepolymer comprises urethane (methyl) acrylate, polyester (methyl) acrylate, epoxy (methyl) acrylate and polyethers (methyl) acrylate.
The example of urethane (methyl) acrylate comprises the reaction product that the reaction by (methyl) acrylate of hydroxyl and polyvalent alcohol and organic multiple isocyanate makes.The example of polyvalent alcohol comprises ethylene glycol, propylene glycol, butyleneglycol etc.The example of organic multiple isocyanate comprises tolylene diisocyanate, 4,4 '-diphenylmethanediisocyanate, 4,4 '-dicyclohexyl methane diisocyanate, hexamethylene diisocyanate and isophorone diisocyanate.The example of (methyl) acrylate of hydroxyl comprises (methyl) acrylic acid hydroxy alkyl ester, for example (methyl) 2-hydroxyethyl acrylate and (methyl) vinylformic acid-2-hydroxypropyl ester.
Polyester (methyl) acrylic ester prepolymer comprises polyester polyol and (methyl) acrylic acid dehydrating condensation product.The example of polyester polyol comprises the reaction product of polyvalent alcohol and diprotic acid, for example ethylene glycol, polyoxyethylene glycol, hexanaphthene dimethyl alcohol, 3-methyl isophthalic acid of polyvalent alcohol wherein, 5-pentanediol, propylene glycol, polypropylene glycol, 1,6-hexylene glycol and TriMethylolPropane(TMP) or its oxyalkylene adduct, diprotic acid is hexanodioic acid, succsinic acid, phthalic acid, hexahydro-phthalic acid and terephthalic acid for example, or its acid anhydrides.
The epoxy acrylate class is for example adduct of (methyl) vinylformic acid reaction of Resins, epoxy and unsaturated carboxylic acid, comprises for example (methyl) acrylate of diglycidyl ether of epoxy (methyl) acrylate of epoxy (methyl) acrylate, phenol or cresol-novolac epoxy resin of bisphenol A type epoxy resin and polyethers.
The example of polyethers (methyl) acrylate comprises polyalkylene glycol two (methyl) acrylate, for example polyoxyethylene glycol two (methyl) acrylate and polypropylene glycol two (methyl) acrylate, and oxyalkylene modified product.
Component (2) monomer comprises styrenic, (methyl) acrylate, vinyl ether etc. and composition thereof.
The example of styrenic and derivative thereof comprises vinylbenzene, alpha-methyl styrene etc.(methyl) acrylate comprises (methyl) acrylic acid hydroxy alkyl ester, for example (methyl) 2-hydroxyethyl acrylate and (methyl) vinylformic acid-2-hydroxypropyl ester; (methyl) alkyl acrylate, for example (methyl) butyl acrylate, (methyl) isobutyl acrylate and (methyl) acrylic acid-2-ethyl polyhexamethylene; Alicyclic alkyl (methyl) acrylate, for example (methyl) cyclohexyl acrylate; Aryl (methyl) acrylate that replaces, for example (methyl) vinylformic acid benzyl ester; (methyl) vinylformic acid alcoxyl base ester, for example (methyl) vinylformic acid-2-methoxy ethyl ester and (methyl) vinylformic acid-2-ethoxyethyl group ester; (methyl) vinylformic acid iso-borneol thiazolinyl ester; With (methyl) acrylate that contains alkoxysilyl.Oxyalkylene adds the acrylate of phenol, for example (methyl) vinylformic acid phenoxy group ethyl ester, and the product of halogen nucleophilic substitution; The list of glycol (methyl) acrylate, for example list (methyl) acrylate of list (methyl) acrylate of list (methyl) acrylate of the list of ethylene glycol (methyl) acrylate, methoxyl group ethylene glycol, Tetraglycol 99 and triglycol; The example that contains the useful monomers of two or more ethylenic unsaturated groups comprises alkylene glycol two (methyl) acrylate, for example ethylene glycol bisthioglycolate (methyl) acrylate and propylene glycol two (methyl) acrylate; Low-molecular-weight polyalkylene glycol two (methyl) acrylate, for example glycol ether two (methyl) acrylate, Tetraglycol 99 two (methyl) acrylate, dipropylene glycol two (methyl) acrylate and tripropylene glycol two (methyl) acrylate, with and the product of oxyalkylene modification; Polyvalent alcohol many (methyl) acrylate, for example trimethylolpropane tris (methyl) acrylate, tetramethylolmethane two or three (methyl) acrylate, tetramethylolmethane four (methyl) acrylate, TriMethylolPropane(TMP) four (methyl) acrylate, Dipentaerythritol five or six (methyl) acrylate, 1,6 hexanediol diacrylate with and the product of oxyalkylene modification; With two or three (methyl) acrylate with the modification of isocyanuric acid oxyalkylene.
The example of vinyl ether comprises hexanaphthene dimethyl alcohol divinyl ether, hydroxyethyl vinyl ether and triethylene glycol divinyl ether.
Other monomeric example comprises N-vinyl pyrrolidone, N-caprolactam, acryloyl morpholine, N-vinyl formamide and N-vinyl acetamide.
Composition of the present invention can add the compound that an ethylenic unsaturated group is arranged as required, to regulate the binding property and the snappiness of cured film.The example of the compound that these are useful comprises (methyl) acrylic acid hydroxy alkyl ester, for example (methyl) 2-hydroxyethyl acrylate and (methyl) vinylformic acid-2-hydroxypropyl ester; (methyl) acrylate of the ethylene oxide adduct of phenol, for example (methyl) vinylformic acid benzene oxygen ethyl ester; The list of glycol (methyl) acrylate, for example glycol monomethyl (methyl) acrylate, methoxyl group glycol monomethyl (methyl) acrylate, triglycol list (methyl) acrylate, Tetraglycol 99 list (methyl) acrylate; And N-vinyl compound, for example N-vinyl pyrrolidone and N-caprolactam.
Preferred polyvalent alcohol many (methyl) acrylate that uses is as two functionality 1,6 hexanediol diacrylates and three-functionality-degree Viscoat 295.1,6 hexanediol diacrylate is a kind of linear chain structure, gives the good snappiness of filming.Contain 3 two keys in the Viscoat 295, can improve the curing speed of filming.
Free radical photo-initiation in the component (3) is photochemical reaction can take place produce a free radical or a hydrionic compounds accepting illumination.Thereby the free radical that radical photoinitiator produced can cause the Raolical polymerizable of system and solidify.The light trigger of different structure has different absorption spectrums and free radical activity, and the light trigger of selecting comparatively to mate with the light source light spectrum energy distribution will improve curing speed greatly.When the formula for a product of definite purposes of design and using method, from used light source, set time require, film properties requires, and and many-side screening light trigger such as economy and different light trigger makes up may produce synergism.Some initiator is a light aging resisting, and some then xanthochromia and scent of can take place, and for example the tackiness agent of white ink, food product pack and printing-ink etc. must be avoided to tight product that special requirement are arranged for these.
The example of light trigger comprises bitter almond oil camphor and alkyl oxide thereof, for example bitter almond oil camphor, benzoin methyl ether, bitter almond oil camphor ethyl ether and bitter almond oil camphor isopropyl ether; Acetophenones, methyl phenyl ketone for example, 2,2-dimethoxy-2-phenyl methyl phenyl ketone (BDK), 2,2-diethoxy-2-phenyl methyl phenyl ketone, 1, the 1-dichloroacetophenone, the 1-hydroxy acetophenone, 1-hydroxycyclohexylphenylketone (184), 2-hydroxy-2-methyl-1-phenyl third-1-ketone (1173), 1-(4-isopropyl phenyl)-2-hydroxy-2-methyl third-1-ketone (1116), 1-[4-(2-hydroxyl-oxethyl) phenyl]-2-hydroxy-2-methyl third-1-ketone (2959), 2-methyl isophthalic acid-[4-(methyl mercapto) phenyl]-2-morpholinyl-propane-1-ketone (907) and 2-benzyl-2-dimethylamino-1-(4-morpholinyl phenyl)-Ding-1-ketone (369); Anthraquinone, for example 2-tertiary butyl anthraquinone, 1-chloroanthraquinone and 2-amyl anthraquinone; Thioxanthone, for example 2,4-dimethyl thioxanthone (DMTX), 2,4-diethyl thioxanthone (DETX), 2 (or 4)-isopropyl thioxanthones (ITX), 2-clopenthixal ketone (CTX) and 2,4-di-isopropyl thioxanthone; Ketal, for example methyl phenyl ketone dimethyl ketal and benzil dimethyl ketal; Benzophenones, for example benzophenone and 4-benzoyl-4 '-dimethyl diphenyl sulfide (DMS); And xanthone; Acyl group is seen oxygen compound as 2; 4; 6-trimethylbenzoyl diphenyl phosphine oxide (TPO), two (2; 4, the 6-trimethylbenzoyl)-phenyl phosphine oxide (819), two (2, the 6-dimethylbenzoyl)-2; 4; 4-tri-methyl-amyl phosphine oxide (BAPO), 2,4,6-trimethylbenzoyl phenyl ethoxy phosphine oxide (TPO-L).
For transparent varnish system, the addition of above-mentioned a kind of light trigger or multiple mixture is preferably based on 5 parts of 100 parts of visible light solidified compositions or littler, more preferably 2-3 part or littler.
For coloured system, the addition of light trigger is preferably based on 1-10 parts of 100 parts of compositions, more preferably 2-8 part or littler.
These light triggers can be used in combination with the aided initiating of amine, dimethylaminobenzoic acid ester class etc.Dimethylaminobenzoic acid ester class, for example ethyl-right-(dimethylamino) benzoic ether (EDAB), octyl group-right-(dimethylamino) benzoic ether (ODAB); Alkyl hydroxyethyl amine, for example: trolamine, tri-isopropanolamine, methyldiethanolamine; The acrylic ester monomer of amine modification or prepolymer.Good promoter action is arranged is well-known to aided initiating to carrying the Hydrogen initiator, and it has the oxygen inhibition of overcoming effect to radical polymerization simultaneously.
The addition of aided initiating is preferably based in the 0.1-10 of 100 parts of Photocurable compositions part or littler, more preferably 0.5-5 part.
Except that above-mentioned necessary component (1)-(3), can also comprise auxiliary agent composition (4).
For example, pigment is to make the necessary composition of printing ink, all pigment that are fit to manufacturing printing ink may be used among the present invention, and the color except that white, black, red, yellow and blue these primitive colour can directly be selected suitable pigment for use or reach the color requirement by the allotment primitive colour.When selected pigment granularity does not reach when requiring, can further reduce granularity by grinding plant and make it to reach service requirements.
Select pigment will consider its disadvantageous effect to curing speed, shelf stability also is a serious problem.
Suitable black pigment can be selected carbon black for use; The example of white pigment is a titanium dioxide; Blue pigments can be a phthalocyanine blue; Yellow ultramarine can be a diarylide yellow; Red pigment can be naphthol red, lithol red etc.The preferred 2-20% of the consumption of each pigment, more preferably 3-15%.
Sometimes also can add filler, for example: barium sulfate, silicon-dioxide, talcum powder, clay and lime carbonate, the performance that can effectively reduce the printing ink cost or give other.
Another kind of special filler is the nano material that can improve toughness and wear resistance, can be very effective in the occasion that particular requirement is arranged, though can increase the cost of product.
According to applied product difference, auxiliary agent also can be the additive of other type.For example, in order further to improve product stability and cured film weather resistance, can add one or more stoppers and weather resistance improving agent.The example of stopper has quinhydrones, Hydroquinone monomethylether, thiodiphenylamine and N-nitrophenyl oxyamine aluminium salt, and their addition should be based on the 10ppm-2% of said composition.The weather resistance improving agent comprises UV light absorber, photostabilizer and antioxidant.The preferred 0.01-5% of their addition.
Press usual method and use guaranteeing additives such as the effective film coalescence aid of product performance, thickening material, flow agent and defoamer.
Composition of the present invention can solidify with ultraviolet light source and visible light source, more preferably uses visible light source, because its safety and reliability and of many uses.If composition of the present invention is used for outdoor coating, then they also can solidify by solar ray.
The present invention preferably uses the visible light source of spectral range 350-750nm.They comprise sunlight, luminescent lamp, metal halide lamp, xenon lamp etc.Preferred metal halide lamp, the especially dysprosium lamp of using, its spectrum is at 350-650nm, and more effective spectral range is 380-480nm.
The present composition can be in packaging vessel stably stored more than six months.
The present composition can or be printed on the base material with the perception method coating of common institute.
Embodiment
Following embodiment and reference examples can illustrate further characteristics of the present invention, but are not subjected to the restriction of these examples.
Involved testing method sees the following form 1 in the embodiments of the invention
Table 1
Test event | Reference standard |
Snappiness | ????GB1731 |
Gloss | ????GB1743 |
Hardness | ????GB1730 |
Embodiment uses the 400W dysprosium lamp as light source, and test piece and filament are apart from 20cm, but the present invention is not limited thereto.
Reference examples uses the 500W ultraviolet lamp as light source, and test piece and filament are apart from 20cm.
Abbreviation among the embodiment has following connotation:
TPO-L:2,4,6-trimethylbenzoyl phenyl ethoxy phosphine oxide (TPO-L)
TPO:2,4,6-trimethylbenzoyl diphenyl phosphine oxide (TPO)
1173:2-hydroxy-2-methyl-1-phenyl third-1-ketone (1173)
ITX:2 (or 4)-isopropyl thioxanthone (ITX)
907:2-methyl isophthalic acid-[4-(methyl mercapto) phenyl]-2-morpholinyl-propane-1-ketone (907)
184:1-hydroxycyclohexylphenylketone (184)
BDK:2,2-dimethoxy-2-phenyl methyl phenyl ketone (BDK)
CN972: acrylic-amino ester, the product of SARTOMER
CN120: epoxy acrylate, the product of SARTOMER
CN292: polyester acrylate, the product of SARTOMER
Embodiment 1
60 parts of bisphenol A epoxy acrylates
Viscoat 295 (TMPTA) 25
Hexanediyl ester (HDDA) 12.5
TPO-L????????????????????????????2.5
Trolamine 0.85
Set time 20s
Reference examples 1
The prescription sample of embodiment 1 is at UV lamp 20s set time.
Embodiment 2
Bisphenol A epoxy acrylate 60
Viscoat 295 (TMPTA) 25
Hexanediyl ester (HDDA) 12.5
TPO??????????????????????????????0.63
1173?????????????????????????????1.90
Trolamine 0.85
Set time 20s
Reference examples 2
The prescription sample of embodiment 2 is at UV lamp 10s set time.
Embodiment 3
CN972(SARTOMER)??????????????????9.6
CN120(SARTOMER)??????????????????29
CN292(SARTOMER)??????????????????19
Viscoat 295 (TMPTA) 29
Hexanediyl ester (HDDA) 9.6
ITX??????????????????????????????2.9
Trolamine 0.96
Set time 30s
Reference examples 3
The prescription sample of embodiment 3 is at UV lamp 30s set time.
Embodiment 4
CN120(SARTOMER)??????????????????48
CN292(SARTOMER)??????????????????19
Viscoat 295 (TMPTA) 29
BDK??????????????????????????????2.9
(dimethylamino)-ethyl benzoate 0.96
Set time 60s
Snappiness 15mm
60 ° of gloss 131
Hardness 0.67
Reference examples 4
The prescription sample of embodiment 4 is at UV lamp 20s set time
Snappiness 15mm
60 ° of gloss 132
Hardness 0.69
Embodiment 5
48 parts of CN120 (SARTOMER)
CN292(SARTOMER)?????????????????19
Viscoat 295 (TMPTA) 29
907?????????????????????????????2.9
ITX?????????????????????????????0.48
Trolamine 0.96
Set time 20s
Snappiness 15mm
60 ° of gloss 131
Hardness 0.67
Reference examples 5
The prescription sample of embodiment 5 is at UV lamp 10s set time
Snappiness 15mm
60 ° of gloss 132
Hardness 0.72
Embodiment 6
48 parts of CN120 (SARTOMER)
CN292(SARTOMER)?????????????????19
Viscoat 295 (TMPTA) 29
TiO2????????????????????????????5
TPO?????????????????????????????4
ITX?????????????????????????????0.48
907?????????????????????????????0.8
Trolamine 0.96
Set time 20s
Reference examples 6
The prescription sample of embodiment 6 is at UV lamp 20s set time.
Embodiment 7-12
Prepolymer and monomer be 8g altogether, adds initiator in the trolamine 0.1g mixture, be coated on the corresponding test panel, and after the curing, the curing membrane performance test result.
Table 2: the light trigger of each embodiment and content and test result
Embodiment | Example 7 | Example 8 | Example 9 | Example 10 | Example 11 | Example 12 |
Light trigger | ???ITX | ???BDK | ????1173 | ????184 | ????1000
1) | ????4265
2) |
Amount (g) | ???0.2 | ???0.3 | ????0.3 | ????0.3 | ????0.3 | ????0.3 |
Set time | ???20s | ???40s | ????40s | ????40s | ????40s | ????40s |
60 ° of gloss | ???135 | ???131 | ????131 | ????135 | ????125 | ????/ |
Snappiness | ???1mm | ???1mm | ????1mm | ????1mm | ????1mm | ????/ |
Hardness | ???0.20 | ???0.24 | ????0.21 | ????0.23 | ????0.21 | ????/ |
Annotate: 1) 1000 is the mixture of 80% (weight) 1173 and 20%184;
2) 4265 is the mixture of 50% (weight) 1173 and 50%TPO.
Content disclosed according to the present invention, other embodiment of the present invention is conspicuous to those of ordinary skills.The specification sheets of this paper and embodiment only are intended as exemplary, and actual range of the present invention and essence will be indicated by claims of the present invention.