CN102952016B - UV-curable monomer and preparation method thereof, polymerisable compound and backlight module - Google Patents
UV-curable monomer and preparation method thereof, polymerisable compound and backlight module Download PDFInfo
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- CN102952016B CN102952016B CN201110251040.XA CN201110251040A CN102952016B CN 102952016 B CN102952016 B CN 102952016B CN 201110251040 A CN201110251040 A CN 201110251040A CN 102952016 B CN102952016 B CN 102952016B
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- polymerisable compound
- acrylate
- monomer
- compound
- curable monomer
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- QGSGYJZFQJASEH-UHFFFAOYSA-N Oc1cc(C(Cc(c(C2)ccc3)c3O)C2c2ccccc2)ccc1 Chemical compound Oc1cc(C(Cc(c(C2)ccc3)c3O)C2c2ccccc2)ccc1 QGSGYJZFQJASEH-UHFFFAOYSA-N 0.000 description 1
- YUQRSZYHJJWGKS-UHFFFAOYSA-N Oc1ccc(C(Cc2c(C3)ccc(O)c2)C3c2ccccc2)cc1 Chemical compound Oc1ccc(C(Cc2c(C3)ccc(O)c2)C3c2ccccc2)cc1 YUQRSZYHJJWGKS-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention provides a kind of UV-curable monomer and preparation method thereof.Present invention also offers a kind of polymerisable compound, containing monomer, light trigger, linking agent in described polymerisable compound, contain or do not contain additive, wherein, described monomer is UV-curable monomer provided by the invention.UV-curable monomer provided by the invention has higher specific refractory power, therefore adopt the specific refractory power of the polymerisable compound of this monomer also higher, make brightness enhancement film of the present invention have stronger reinforced effects to luminance brightness, adopt the backlight module of this brightness enhancement film to have good brightness value.
Description
Technical field
The invention belongs to field of liquid crystal, particularly relate to a kind of UV-curable monomer and preparation method thereof, polymerisable compound and backlight module.
Background technology
Liquid-crystal display (Liquid Crystal Display, LCD) progressively replace legacy CRT display with light, thin, short, little, low thermal losses, low power consumption, the advantage such as radiationless, and be widely used in electroluminescent panel, laptop computer, word processor, both desktop monitors, televisor, pick up camera etc.Forming primarily of panel and backlight module two parts of liquid-crystal display, panel itself is not luminous, and the backlight module of therefore originating as brightness is the significant components of LCD Presentation Function.Backlight module comprises fluorescent tube, light guiding plate and various bloomings etc.Present for enabling LCD and better view and admire angle and color, in backlight module, utilize blooming miscellaneous, such as, improved the briliancy of backlight module by brightness enhancement film.
Brightness enhancement film (Brightness Enhancement Film, BEF) is also known as condensing film, and it, by being coated with special acryl polymerisable compound on polyester base material, utilizes high energy UV hardened into prism microstructure and obtain.The major function of brightness enhancement film is the ray-collecting at random will be dispersed into by light guiding plate from all directions by refraction and inner full-reflection, and to focus on ± positive the view directions of 35 °, thus the brightness of raising LCD.Therefore, the specific refractory power of the coating formed after the polymerisable compound sclerosis be coated with determines the efficiency of brightness enhancement film.
The specific refractory power of common polymeric coating is approximately between 1.48 to 1.5, and the liquid-crystal display utilizing the brightness enhancement film after this polymer cure to prepare can not have enough brightness.Such as, a kind of polymerisable compound containing nano particle is disclosed in CN1969201A, by employing, there is blast paradigmatic structure first monomer in this polymerisable compound, and add appropriate inorganic nanoparticles simultaneously, thus ensure the light enhancing effect of this brightness enhancement film.But in this invention, the specific refractory power of the coating that this polymerisable compound is formed is lower, still more weak to the increase level of LCD brightness
Summary of the invention
The specific refractory power that the invention solves the bright enhancement film polymerisable compound existed in prior art is lower cause adopting this polymer cure after the more weak technical problem of the brightness of the liquid-crystal display of bright enhancement film that formed.
The invention provides a kind of UV-curable monomer, described UV-curable monomer has structure shown in formula I or II:
Wherein, R
1, R
2, R
3, R
4and R
5be H, halogen, C independently of one another
1-C
5alkyl or
and R
1, R
2, R
3, R
4and R
5in at least one be
x is H or C
1-C
5alkyl; Y, Z are H, OH or C independently of one another
1-C
5alkyl; M is the integer of 0 to 6.
Present invention also offers the preparation method of described UV-curable monomer, comprise and the compound shown in formula VII or VIII and the compound shown in formula IX are obtained by reacting pre-product, then by the acrylic compound reaction shown in pre-product and formula X, described UV-curable monomer is namely obtained;
Wherein, R '
1, R '
2, R '
3, R '
4and R '
5be H, halogen, C independently of one another
1-C
5alkyl or-OH, and R '
1, R '
2, R '
3, R '
4and R '
5in at least one be-OH; X is H or C
1-C
5alkyl; Y, Z are H, OH or C independently of one another
1-C
5alkyl; M is the integer of 0 to 6.
Present invention also offers a kind of polymerisable compound, containing monomer, light trigger, linking agent in described polymerisable compound, contain or do not contain additive, wherein, described monomer is UV-curable monomer provided by the invention.
Finally, the invention provides a kind of backlight module, described backlight module comprises fluorescent tube, light guiding plate and brightness enhancement film, and wherein, described brightness enhancement film is solidify to form by polymerisable compound provided by the invention.
UV-curable monomer provided by the invention, the phenyl ring replaced with reactive functional groups acrylate and other aromatic ring form particular space angle, thus make UV-curable monomer of the present invention have higher specific refractory power, adopt the specific refractory power of the polymerisable compound of this monomer also to obtain corresponding raising simultaneously.Therefore, the brightness enhancement film formed by this polymerisable compound has stronger reinforced effects to luminance brightness, makes backlight module provided by the invention have good brightness value, thus more improves the brightness of the LCD adopting this backlight module.The preparation method of described UV-curable monomer provided by the invention simplifies, easy to implement.
Embodiment
Term used in the present invention is described as follows:
" specific refractory power " refers to the absolute refractive index of material (such as, monomer), and its implication is electromagnetic radiation speed in a vacuum and the ratio of the speed of this radiation in that material.Can currently known methods be adopted and usually use Abbérefractometer (the Fisher Instruments company in city of Pennsylvania, America Pittsburgh) to measure specific refractory power in visible region.
" acrylate " both referred to acrylic compound, also methacrylate compound.
" polyfunctionality " refers to containing two or more acrylate-functional groups.
" single functionality " refers to containing an acrylate-functional groups.
The invention provides a kind of UV-curable monomer, described UV-curable monomer has structure shown in formula I or II:
Wherein, R
1, R
2, R
3, R
4and R
5be H, halogen, C independently of one another
1-C
5alkyl or
and R
1, R
2, R
3, R
4and R
5in at least one be
x is H or C
1-C
5alkyl; Y, Z are H, OH or C independently of one another
1-C
5alkyl; M is the integer of 0 to 6.
The present inventor finds, by adopting the phenyl ring that replaces with reactive functional groups acrylate and other aromatic ring to form particular space angle in monomer structure, thus makes UV-curable monomer of the present invention have higher specific refractory power.
Meanwhile, UV-curable monomer provided by the invention, relatively stable in chemical environment, yellowing effect can not be there is.
In the present invention, for reducing synthesis cost, under preferable case, R
1, R
2, R
3, R
4and R
5in at least two be
x, Y, Z are H or-CH independently of one another
3; M is the integer of 1 to 4; R
1, R
2and R
3be H ,-CH independently of one another
3,-OCH
3.
More preferably, in situation, described UV-curable monomer is the compound of structure shown in formula formula III, IV, V or VI:
Present invention also offers the preparation method of described UV-curable monomer, comprise and the compound shown in formula VII or VIII and the compound shown in formula IX are obtained by reacting pre-product, then by the acrylic compound reaction shown in pre-product and formula X, described UV-curable monomer is namely obtained;
Wherein, R '
1, R '
2, R '
3, R '
4and R '
5be H, halogen, C independently of one another
1-C
5alkyl or-OH, and R '
1, R '
2, R '
3, R '
4and R '
5in at least one be-OH; X is H or C
1-C
5alkyl; Y, Z are H, OH or C independently of one another
1-C
5alkyl; M is the integer of 0 to 6.
Due to R '
1, R '
2, R '
3, R '
4and R '
5in at least one is-OH, therefore the compound shown in formula VII or VIII is phenolic hydroxyl structure, and the reaction of compound generation hydroxyl condensation shown in itself and formula IX, forms alkoxide, namely on phenyl ring, introduce alkyloxy side chain structure, obtain pre-product.Then on pre-product, the acrylic compound shown in remaining hydroxyl and formula X continues condensation reaction occurs, and forms acrylate structural, namely obtains UV-curable monomer of the present invention.
Under preferable case, the hydroxyl condensation of the compound shown in the compound shown in formula VII or formula VIII and formula IX reacts and carries out in dimethyl formamide (DMF), and the reaction of the acrylic compound of structure shown in pre-product and formula X is carried out in toluene.
In the present invention, for reducing synthesis cost, under preferable case, R '
1, R '
2, R '
3, R '
4and R '
5in at least two be
x, Y, Z are H or-CH independently of one another
3; M is the integer of 1 to 4; R
1, R
2and R
3be H ,-CH independently of one another
3,-OCH
3.
More preferably, in situation, the compound shown in described formula VII preferably adopts the compound of structure shown in XI, XII:
Compound shown in formula VIII preferably adopts the compound of structure shown in XIII, XIV:
Compound shown in formula IX preferably adopts ethylene glycol or HO-CH
2-CH
2-O-CH
2-CH
2-OH, the acrylic compound shown in formula X preferably adopts vinylformic acid CH
2=CH-COOH.
Present invention also offers a kind of polymerisable compound, containing monomer, light trigger, linking agent in described polymerisable compound, contain or do not contain additive, described monomer is UV-curable monomer provided by the invention.
Polymerisable compound provided by the invention, has good bonding force with base material, has higher surface strength, is liquid state under normal temperature.
Under preferable case, with the total mass of polymerisable compound for benchmark, the content of monomer is 5-30wt%, and the content of light trigger is 0.1-6wt%, and the content of linking agent is 2-30wt%, and the content of additive is 0.1-5wt%.In the present invention, by suitably selecting component concentration each in polymerisable compound, when making each component in aforementioned content range, described polymerisable compound has higher specific refractory power, and the bonding force of itself and base material is also further enhanced.
Particularly, in the present invention, described light trigger refers to and can produce free radical after UV-irradiation, and passes through the material of the transmission polyreaction of free radical, and it can cause above-mentioned UV-curable monomer polymerization reaction take place.
In the present invention, do not have particular requirement to the kind of initiator, it directly can adopt various light triggers conventional in prior art.Such as, described light trigger can be selected from following at least one: benzophenone, bitter almond oil camphor, benzil, 1-hydroxy cyclohexyl phenylketone (I184), monoacylphosphine oxides and two acylphosphine oxides etc.These light triggers are all commercially available.Such as, monoacylphosphine oxides or two acylphosphine oxide light trigger can obtain as follows: with 2 of trade(brand)name " Lucirin TPO " available from BASF (being positioned at North Carolina, USA Charlotte city), 4,6-trimethyl benzoyl diphenyl base phosphine oxide; With ethyl-2,4, the 6-trimethylbenzoyl phenyl phosphinate (ethyl-2,4,6-trimethylbenzoylphenyl phosphinate) of trade(brand)name " Lucirin TPO-L " available from BASF; And with trade(brand)name " Irgacure 819 " two (2,4,6-trimethylbenzoyl)-phenyl phosphine oxides purchased from Ciba Specialty Chemicals.In a concrete example of the present invention, adopt 2-hydroxy-2-methyl-1-phenyl-propyl-1-ketone as light trigger, its can trade(brand)name Darocur 1173 purchased from Ciba Specialty Chemicals.In concrete examples more of the present invention, product that direct market is bought can be used as light trigger, such as UV278, UV307, Darocur 4265, Irgacure 651, Irgacure 1800, Irgacure 369, Irgacure 1700 and Irgacure 907.
The macromole of line style or slight branched chain type can be formed tridimensional network by described linking agent, improves the hardness of coating, high thermal resistance and wear resistance.In the present invention, described linking agent is polyfunctional acrylic ester monomer.Described polyfunctional acrylic ester monomer is used as linking agent, also can improve the second-order transition temperature of polymerisable compound, thus improve its heat resistance.Under preferable case, described linking agent is for comprising at least two (methyl) acrylate-based monomer.
Particularly, described linking agent is selected from one or more in polyester acrylate, epoxy acrylate, Epoxy Phenolic Acrylates, hexanediol diacrylate, three (methyl) acrylate, pentaerythritol, four (methyl) acrylate, pentaerythritol, trimethylolpropane tris (methyl) acrylate, ethoxylated trimethylolpropane three (methyl) acrylate, three (methyl) glycerol acrylate and propoxylation three (methyl) acrylate, pentaerythritol.
Because the reactivity of methacrylate based reactivity often than acrylate-based is lower, therefore as a further improvement on the present invention, described linking agent preferably adopts not methylic acrylate.
In the present invention, described linking agent also directly can adopt commercial products, such as, can adopt SR444.
For avoiding the molecular weight of polymerisable compound too high, viscosity is too large, cause operability to be deteriorated, coating time be easy to occur the shortcomings such as levelling property is bad, affect the performance after its film-forming, as the common practise of those skilled in the art, also containing thinner in described polymerizable compositions.
Described thinner mainly carries out diluting effect with to polymerisable compound, to adjust the viscosity of polymerisable compound.Under preferable case, with the total mass of polymerisable compound for benchmark, the content of thinner is 30-70wt%.
In the present invention, described thinner can adopt various single functionality acrylate monomers common in prior art.Such as, thinner can be selected from following group but be not limited thereto: (methyl) acrylate, 2-phenoxyethyl acrylate (2-phenoxyl ethyl acrylate), adjacent phenyl benzene ethoxyethyl acrylate, 2-(p-cumyl-phenoxy group)-ethyl propylene acid esters (cumyl phenoxyl ethyl acrylate).Described thinner also directly can adopt commercial products, such as, can adopt acrylate CP-011.
According to embodiments of the invention, polymerisable compound of the present invention also can contain various typical additives as required, makes described polymerisable compound have various additional effect, improves physics or the chemical property of polymerisable compound of the present invention.Such as, described additive can be selected from one or more in mineral filler, static inhibitor, flow agent, defoamer and lubricant.
Wherein, after mineral filler can improve solidification, polymerisable compound institute forms the hardness of coating, also has effect of lifting panel of LCD briliancy.Described mineral filler can be selected from titanium dioxide (TiO
2), silicon-dioxide (SiO
2), zinc oxide (ZnO), barium sulfate (BaSO
4), calcium carbonate (CaCO
3), zirconium white (ZrO
2) in one or more.Under preferable case, described mineral filler adopts silicon-dioxide, zirconium white, titanium dioxide.The particle diameter of above-mentioned mineral filler is about 0.01-200 micron, is preferably 0.02-100 micron.
Described static inhibitor, for making coating have anlistatig effect, improves operation yield.Described static inhibitor can be selected from oxyethyl group glycerol fatty acid ester class, quaternary ammonium compound, fatty amines derivative, epoxy resin (as polyethylene oxide), siloxanes (siloxane) or other alcohol derivatives (as PVOH ester or polyglycol ether) one or more.Such as, described static inhibitor can adopt octadecyldimethyl ethoxyl quaternary ammonium salt.
Described flow agent, defoamer, lubricant are conventionally known to one of skill in the art, be not particularly limited, repeat no more in the present invention.
The preparation method of polymerizable compositions provided by the invention, can directly by mixing can obtain component each in composition.Under preferable case, for shortening mixing time, preferably mix at 40-80 DEG C.
Finally, the invention provides a kind of backlight module, described backlight module comprises fluorescent tube, light guiding plate and brightness enhancement film, and wherein, described brightness enhancement film is solidify to form by polymerisable compound provided by the invention.
Wherein, the structure of fluorescent tube, light guiding plate is conventionally known to one of skill in the art, is not particularly limited, repeats no more in the present invention.Described brightness enhancement film solidify to form by being irradiated under ultraviolet light by polymerisable compound provided by the invention.
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.In embodiment and comparative example adopt raw material to be all commercially available.
Embodiment 1
The raw material used in the present embodiment is as follows:
(a): compound shown in formula III; The compound of structure shown in formula XI and ethylene glycol are obtained by reacting pre-product in DMF, then will add vinylformic acid CH again
2=CH-COOH, obtains compound shown in formula III.
(b): light trigger I184;
(c): crosslinking aid S R444;
(d): thinner: adjacent phenyl benzene ethoxyethyl acrylate;
(e): additive: 15wt%SiO
2+ 40wt% octadecyldimethyl ethoxyl quaternary ammonium salt+15wt% flow agent BYK-333+15wt% defoamer BYK-018+15wt% lubricant.
The ratio of above-mentioned raw materials in table 1 is mixed, and in 50 DEG C of heated and stirred to the colloid polymerisable compound S1 forming a kind of homogeneous transparent.The above-mentioned colloidal state polymerisable compound S1 prepared is coated on polyethylene terephthalate (PET) base material, form the coating of tool prism decorative pattern with ultraviolet radiation-curable, the thickness namely obtaining being formed by this polymerisable compound is the brightness enhancement film S11 of 20 microns.
Embodiment 2-4
Adopt the step identical with embodiment 1 to prepare polymerisable compound S2-S4 and brightness enhancement film S22-S44, difference is that each component proportion is as shown in table 1.
Table 1
| Component | (a)/gram | (b)/gram | (c)/gram | (d)/gram | (e)/gram |
| S1 | 5 | 3 | 25 | 65 | 2.0 |
| S2 | 10 | 3 | 25 | 60 | 2.0 |
| S3 | 15 | 3 | 25 | 55 | 2.0 |
| S4 | 20 | 3 | 25 | 50 | - |
Note: in S2, (a) is compound shown in formula IV, by reacting obtained after the compound of structural formula shown in formula XII and glycol reaction again with vinylformic acid; In S3, (a) is compound shown in formula V, by reacting obtained after the compound of structural formula shown in formula XIII and glycol reaction again with vinylformic acid; In S4, (a) is compound shown in formula VI, by reacting obtained after the compound of structural formula shown in formula XIV and glycol reaction again with vinylformic acid.
Comparative example 1
Method disclosed in embodiment 1 in CN1969201A is adopted to prepare the polymerizable resin composition DS1 of this comparative example.Be coated on by upper DS1 on polyethylene terephthalate (PET) base material, form the coating of tool prism decorative pattern with ultraviolet radiation-curable, the thickness namely obtaining being formed by this polymerisable compound is the brightness enhancement film DS11 of 20 microns.
Performance test:
Above-mentioned each brightness enhancement film S11-S44 and DS11 is placed in backlight module, utilizes BM-7 brightness photometer to carry out briliancy test.Consequently the specific refractory power provided is learned in Dehua is simultaneously that the brightness enhancement film of the tool prism decorative pattern of the polymerisable compound formation of 1.56 is as DS22.Test result is as shown in table 2.
Table 2
| Brightness enhancement film | Briliancy |
| S11 | 3476 |
| S22 | 3521 |
| S33 | 3585 |
| S44 | 3618 |
| DS11 | 3455 |
| DS22 | 3442 |
Test result as can be seen from upper table 2, the brightness enhancement film utilizing the polymerisable compound of the embodiment of the present invention to prepare and the brightness value of backlight module, apparently higher than the brightness value of DS11-DS22, illustrate that brightness enhancement film of the present invention has stronger reinforced effects to luminance brightness.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a UV-curable monomer, is characterized in that, described UV-curable monomer is formula III, the compound of structure shown in IV, V or VI:
2. the preparation method of UV-curable monomer described in claim 1, it is characterized in that, comprise and the compound shown in formula VII or VIII and the compound shown in formula IX are obtained by reacting pre-product, then by the acrylic compound reaction shown in pre-product and formula X, namely obtain described UV-curable monomer;
Wherein, R '
1, R '
2, R '
3, R '
4and R '
5be H, halogen, C independently of one another
1-C
5alkyl or-OH, and R '
1, R '
2, R '
3, R '
4and R '
5in at least one be-OH; X is H or C
1-C
5alkyl; Y, Z are H, OH or C independently of one another
1-C
5alkyl; M is the integer of 0 to 6.
3. a polymerisable compound, containing monomer, light trigger in described polymerisable compound, linking agent, contains or not containing additive, it is characterized in that, described monomer is UV-curable monomer according to claim 1.
4. polymerisable compound according to claim 3, is characterized in that, with the total mass of polymerisable compound for benchmark, the content of monomer is 5-30wt%, the content of light trigger is 0.1-6wt%, and the content of linking agent is 2-30wt%, and the content of additive is 0.1-5wt%.
5. polymerisable compound according to claim 3, is characterized in that, described light trigger be selected from benzophenone, bitter almond oil camphor, benzil, 1-hydroxy cyclohexyl phenylketone, monoacylphosphine oxides and two acylphosphine oxide one or more.
6. polymerisable compound according to claim 3, is characterized in that, described linking agent is polyfunctional acrylic ester monomer.
7. polymerisable compound according to claim 6, it is characterized in that, described linking agent be selected from polyester acrylate, epoxy acrylate, Epoxy Phenolic Acrylates, hexanediol diacrylate, three (methyl) acrylate, pentaerythritol, four (methyl) acrylate, pentaerythritol, trimethylolpropane tris (methyl) acrylate, ethoxylated trimethylolpropane three (methyl) acrylate, three (methyl) glycerol acrylate and propoxylation three (methyl) acrylate, pentaerythritol one or more.
8. polymerisable compound according to claim 3, is characterized in that, with the total mass of polymerisable compound for benchmark, and the thinner also containing 30-70wt% in described polymerisable compound; Described thinner is single functionality acrylate monomer.
9. polymerisable compound according to claim 3, is characterized in that, described additive be selected from mineral filler, static inhibitor, flow agent, defoamer and lubricant one or more.
10. a backlight module, described backlight module comprises fluorescent tube, light guiding plate and brightness enhancement film, it is characterized in that, described brightness enhancement film is solidify to form by the polymerisable compound described in any one of claim 3-9.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4144283A (en) * | 1976-10-07 | 1979-03-13 | Toyo Ink Manufacturing Co., Ltd. | Curable coating compositions |
| CN101120061A (en) * | 2004-12-13 | 2008-02-06 | 通用电气公司 | Compositions for articles comprising replicated microstructures |
| CN101630090A (en) * | 2008-07-18 | 2010-01-20 | 统宝光电股份有限公司 | Backlight module |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100544824B1 (en) * | 2005-01-27 | 2006-01-24 | 주식회사 코오롱 | A composition for making of prism layer and prism film made by using the same |
| KR101563574B1 (en) * | 2009-01-23 | 2015-10-27 | 디아이씨 가부시끼가이샤 | Polymerizable biphenyl compound |
-
2011
- 2011-08-29 CN CN201110251040.XA patent/CN102952016B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4144283A (en) * | 1976-10-07 | 1979-03-13 | Toyo Ink Manufacturing Co., Ltd. | Curable coating compositions |
| CN101120061A (en) * | 2004-12-13 | 2008-02-06 | 通用电气公司 | Compositions for articles comprising replicated microstructures |
| CN101630090A (en) * | 2008-07-18 | 2010-01-20 | 统宝光电股份有限公司 | Backlight module |
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