CN100590459C - Methacrylate methacrylic ester class resin composition used for light guiding plate - Google Patents
Methacrylate methacrylic ester class resin composition used for light guiding plate Download PDFInfo
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- CN100590459C CN100590459C CN200710130096A CN200710130096A CN100590459C CN 100590459 C CN100590459 C CN 100590459C CN 200710130096 A CN200710130096 A CN 200710130096A CN 200710130096 A CN200710130096 A CN 200710130096A CN 100590459 C CN100590459 C CN 100590459C
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Abstract
The invention relates to a methacrylate resin composite material used for a light guide plate in a backlight module of a liquid crystal display, comprising methacrylate resin (A), inorganic particles(B) and a slip agent (C); wherein, the content of the inorganic particles (B) takes up 0.05-20ppm of the weight of the methacrylate resin (A); the melting point of the slip agent (C) is 40-85 DEG C, and the content of the slip agent (C) takes up 50-3000ppm of the weight of the methacrylate resin (A); the methacrylate resin (A) contains 2-8 wt% of low-molecular-weight polymer with the average molecular weight reaching 2000-20000; through such compositions, the high-luminance methacrylate resin composite used for the light guide plate with luminance uniformity can be obtained.
Description
Technical field
The present invention is relevant with backlight module, in detail, refers in particular to methacrylate ester resin composition for light plate in a kind of backlight module.
Background technology
Among the transparent heat moldable resin, excellent with the light peneration of methacrylate ester resin, the tool mechanical strength property was used in most lighting uses in the past.Also be used in backlight module light guide plate such as display device again recently.Particularly under the strong request of the high briliancy of display device, maximization, slimming in recent years,, continue the exploitation light-emitting device, wherein, requirements at the higher level are arranged for the briliancy of light guide plate with brighter, bigger, thinner commodity concept.Generally speaking, for obtaining high luminance light guide board, drop into light guide plate when penetrating light guide plate in light, should reduce the light loss in the light guide plate as far as possible, for satisfying this requirement, light guide plate lower as far as possible wherein impurity or the interpolation of other adjuvant, but only be so, still can't satisfy the requirement of light guide plate for high briliancy.
Generally speaking, inorganic diffusant particulate is used for the purposes of light diffusing sheet more, and for example Japanese kokai publication hei 9-31288 though can obtain homogeneous light emitting area, can cause light transmittance to lower, and briliancy also can descend.But recent discovers, the diffusant particulate that adds trace can improve the briliancy of light guide plate in light guide plate.Usually use inorganic diffusant particulate,,, be easy to generate luminance nonuniformity one, the problem that briliancy can't effectively improve because be difficult for evenly disperseing though only need a spot of interpolation.
Summary of the invention
The object of the present invention is to provide a kind of methacrylate ester resin composition for light plate.
For achieving the above object, methacrylate ester resin composition for light plate provided by the invention, it comprises:
Methacrylate ester resin (A);
Inorganic fine particles (B); And
Lubrication prescription (C);
Wherein, this inorganic fine particles (B) content is 0.05～20ppm of methacrylate ester resin (A) weight, this lubrication prescription (C) fusing point is 40～85 ℃, content is 50～3000ppm of methacrylate ester resin (A) weight, and this methacrylate ester resin (A) contains low-molecular weight polymer 2～8 weight % of weight average molecular weight 2000～20000.
Described methacrylate ester resin composition for light plate, wherein, this inorganic fine particles (B) content is 0.1～15ppm of methacrylate ester resin (A) weight.
Described methacrylate ester resin composition for light plate, wherein, this inorganic fine particles (B) content is 0.3～4ppm of methacrylate ester resin (A) weight.
Described methacrylate ester resin composition for light plate, wherein, this methacrylate ester resin (A) contains low-molecular weight polymer 3～6.5 weight % of weight average molecular weight 2000～20000.
Described methacrylate ester resin composition for light plate, wherein, this lubrication prescription (C) content is 200～800ppm of methacrylate ester resin (A) weight.
Described methacrylate ester resin composition for light plate, wherein, this lubrication prescription (C) fusing point is 45～80 ℃.
Described methacrylate ester resin composition for light plate, wherein, this inorganic fine particles (B) content is the X (ppm) of methacrylate ester resin (A) weight, the content that this methacrylate ester resin (A) contains the low-molecular weight polymer of weight average molecular weight 2000～20000 is Y (weight %), X/Y=0.03～3.0.
Described methacrylate ester resin composition for light plate, wherein, X/Y=0.05～2.0.
Described methacrylate ester resin composition for light plate, wherein, this methacrylate ester resin (A) is to make with the continuous solution polymerization method.
Described methacrylate ester resin composition for light plate, wherein, this light guide plate is to make with the extrusion forming process.
By enforcement of the present invention, can obtain the light guide plate of high briliancy and briliancy homogeneous.
Description of drawings
Fig. 1 is the view that is provided with when utilizing the present invention to make light guide plate to average briliancy and briliancy all degree is measured together.
Primary clustering symbol description in the accompanying drawing:
Cold cathode fluorescent lamp 1
Light reflecting board 4
Upper and lower diffusion barrier 5
Brightness enhancement film 6
Embodiment
Methacrylate ester resin composition for light plate of the present invention comprises methacrylate ester resin (A), inorganic particles (B) and lubrication prescription (C); Wherein, this inorganic fine particles (B) content is for accounting for 0.05～20ppm of methacrylate ester resin (A), this lubrication prescription (C) fusing point is 40～85 ℃, content is for accounting for 50～3000ppm of methacrylate ester resin (A), and this methacrylate ester resin (A) contains low-molecular weight polymer 2～8 weight % of weight average molecular weight 2000～20000, form collocation by above-mentioned, can obtain the methacrylate ester resin composition for light plate of high briliancy and briliancy homogeneous.
Methacrylate ester resin of the present invention (A) is to be that main composition polymerization gets by the methacrylate ester monomer, be preferably and have methyl methacrylate 70～100 weight % and copolymerizable monomer 0～30 weight %, be more preferred from and have methyl methacrylate 90～100 weight % and copolymerizable monomer 0～10 weight % and carry out copolymerization and obtain.Copolymerizable monomer is for example: Jia Jibingxisuanyizhi, propyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, methacrylic acid 2-Octyl Nitrite, methacrylic acid three ring esters in the last of the ten Heavenly stems, phenyl methacrylate, the methyl acrylic ester of methacrylic acid benzene methyl etc., methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, cyclohexyl acrylate, 2-EHA, acrylic acid three ring esters in the last of the ten Heavenly stems, phenyl acrylate, the esters of acrylic acid of acrylic acid benzene methyl etc., methacrylic acid, the unsaturated acids of acrylic acid etc., maleic anhydride, maleimide and styrene etc., but be not limited to these.Aforementioned copolymerizable monomer is preferable with Jia Jibingxisuanyizhi, propyl methacrylate, butyl methacrylate, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate etc.Again, these monomers can use separately, and it is above and use also can to mix 2 kinds or 2 kinds.
The concrete example of inorganic fine particles used in the present invention (B), for example: BaSO
4, TiO
2, Al
2O
3, CaCO
3, MgSO
4, Mg (OH)
2Deng for representative, but not as limit, its mean grain size is 0.05～15 μ m, and is good with 0.12～5 μ m, and to be particularly suitable for be 0.15～1.0 μ m.This atomic mean grain size is the number mean grain size of measuring with particle counting.
Again, the addition of inorganic fine particles (B) is 0.05～20ppm of methacrylate ester resin (A) weight, is preferable with 0.1～15ppm, and 0.3～4ppm is for better.The addition of inorganic fine particles (B) can't promote the briliancy of light guide plate when being discontented with 0.05ppm, when surpassing 20ppm, and the form and aspect variation of light guide plate.
Above-mentioned particulate (B) concrete example, wherein, with Al
2O
3Refractive index is 1.7～1.8, TiO
2Refractive index is 2.3～2.6, for the briliancy that improves light guide plate pretty good effect, particularly TiO is arranged
2Best results.Only merely add this kind inorganic fine particles in the methacrylate ester resin, for equal once the poor effect of high briliancy and briliancy, therefore, the present invention is a head it off, still need and cooperate other two kinds of conditions, promptly, lubrication prescription (C) content that comprises 40～85 ℃ of fusing points is 50～3000ppm of methacrylate ester resin (A) weight, reach low-molecular weight polymer 2～8 weight % that methacrylate ester resin (A) contains weight average molecular weight 2000～20000, can make the methacrylate ester resin composition for light plate of high briliancy and briliancy homogeneous.
Lubrication prescription used in the present invention (C) is required to be the lubrication prescription of 40～85 ℃ of fusing points, is preferably 45～80 ℃, if fusing point is higher than 85 ℃, then can't obtain the light guide plate of high briliancy and briliancy homogeneous; If fusing point is lower than 40 ℃, then via easily having bubble to make that the briliancy of made light guide plate is not good in extrusion, the cutting resulting granules shape resin.The concrete example of lubrication prescription used herein (C) is as fatty acid ester of the higher fatty acid of the higher alcohol of 18 alcohol (stearyl alcohol) etc., stearic acid (stearic acid) etc. or glycerin monostearate (glyceryl monostearate) etc. etc.The addition of aforementioned lubrication prescription (C) is 50～3000ppm of methacrylate ester resin (A) weight, is preferably 120～2000ppm, is more preferred from 200～800ppm, as the discontented 50ppm of lubrication prescription (C) content, then can't make the light guide plate of high briliancy and briliancy homogeneous; If lubrication prescription (C) content surpasses 3000ppm, the form and aspect variation of prepared methacrylate ester resin composition then also can't obtain the light guide plate of high briliancy.
And, the inventor discovers, the low-molecular weight polymer of the methacrylate ester resin (A) of certain content exists, can make the light guide plate of high briliancy of the present invention and briliancy homogeneous, its actuation gear is unclear, but suppositions such as inventor may be relevant with the dispersiveness that helps inorganic fine particles, promptly, in methacrylate ester resin (A), the low-molecular weight polymer content of weight average molecular weight 2000～20000 is discontented with 2 weight %, then can't make the light guide plate of high briliancy; When low-molecular weight polymer content surpasses 8 weight %, then the thermotolerance of light guide plate is not good; The low-molecular weight polymer content of weight average molecular weight 2000～20000 is more preferred from 3～6.5 weight %, and the best is 4～6 weight %.It is the polymkeric substance that the major component polymerization gets that aforementioned low-molecular weight polymer comprises the methacrylate ester resin, preferably is same as the composition of methacrylate ester resin (A).
Again, the content that makes inorganic fine particles (B) is the X (ppm) of methacrylate ester resin (A) weight, and in the methacrylate ester resin (A), the low-molecular weight polymer content of weight average molecular weight 2000～20000 is Y (weight %), X/Y=0.03～3.0 are more preferred from 0.05～2.0.In the scope of X/Y 0.03～3.0, the high briliancy of then made light guide plate is even more ideal.
The manufacture method of methacrylate ester resin of the present invention (A) can use any polymerizations such as outstanding turbid polymerization, emulsion polymerization method, continuous block polymerization or continuous solution polymerization method to make.
The present invention is based on the viewpoint of a large amount of productions and operation ease, preferably use the continuous solution polymerization method, continuous solution polymerization method of the present invention is with starting monomer (for example methacrylate ester monomer etc.), with solvent and optionally and the polymerization initiator, molecular weight regulator of choosing etc. add polymerization in the reactor continuously, polymerization and polymkeric substance, solvent then takes out from reactor continuously, gets the methacrylate ester resin through going to volatilize step.Its employed solvent cording has the also high boiling point of monomer (for example methyl methacrylate monomer and/or copolymerizable monomer) than material resin, for example: the ester class, 1 of the alicyclic compound of the fatty compound of the aromatics of toluene, dimethylbenzene, ethylbenzene, diethylbenzene etc., octane, decane etc., naphthalane etc., butyl acetate, amyl acetate etc., 1,2, the alkali cpd of 2-tetrachloroethane etc.Wherein have suitable boiling point with toluene, dimethylbenzene, ethylbenzene, load is few when the degassing, again, polymkeric substance is had no adverse effects so be preferable selection.Quantity of solvent is different according to the boiling point of solvent, but the weight of the full potpourri during according to polymerization is preferably more than the 50 weight %, is more preferred from more than the 55 weight %.
In the employed polymerization initiator of continuous solution polymerization method, can under polymerization temperature, activity decompose, and produce the polymerization initiator of free radical.For example; peroxidating two tributyls; dicumyl peroxide; methyl ethyl ketone peroxide; two tributyls are crossed phthalate ester; two tributyl perbenzoates; tributyl is crossed the second formic ether; 2; 5-dimethyl-2; 5-two (peroxidating tributyl) hexane; 1; two (the peroxidating tributyls)-(3 of 1-; 3; the 5-trimethyl) cyclohexane; 1; two (peroxidating tributyl) cyclohexanes of 1-; peroxidating 2 the 3rd amyl group; the benzoyl peroxide base; cumene hydroperoxide; the peroxidating lauryl; the two isobutyl alcohol diacetate esters of azo; 1; 1 '-azo bis cyclohexane nitrile; 2-phenylazo 2; 4-dimethyl-4-methoxyl valeronitrile; 2-cyanogen 2; 2-propyl group azodicarbonic acid; 2,2 '-azobis isobutyronitrile etc.The use amount of these polymerization initiators is preferably 0.001～1 weight % according to the weight of full response monomer mixture, is more preferred from 0.01～0.2 weight %.
Molecular weight regulator used in the present invention is mainly thio-alcohol, for example: normal-butyl mercaptan, isobutyl mercaptan, n-octyl mercaptan, positive 12 carbon alkyl sulfhydryls, tributyl mercaptan, the 22 carbon alkyl sulfhydryl, phenyl mercaptan, sulphur methyl alcohol, sulphur acetic acid esters and its ester and dithioglycol etc.The use amount of these molecular weight regulators is preferably 0.001～0.8 weight % according to the weight of full response monomer mixture, is more preferred from 0.01～0.35 weight %.
Reactive tank can use the stirring apparatus with double helix or oar type paddle.Make monomer mixture solution be supplied to reactive tank continuously, carry out polyreaction under 70～160 ℃ temperature, the conversion ratio of monomer is 40～90%.
According to the polymer solution of aforementioned polyreaction gained, take out polymkeric substance through going volatilization.Go volatilization device can use with the extruder of multistage vent port or devolatilization groove etc.Be preferably and make polymer solution be heated to 200～290 ℃ temperature with preparation well heater etc., again with 200～270 ℃, 20～100Torr under vacuum the devolatilization of devolatilization groove and the resin raw material of molten state methacrylate ester resin (A), then the resin raw material of methacrylate ester resin (A) is delivered to extruder with molten condition, and interpolation inorganic fine particles and lubrication prescription, further through die head extrusion bar, again cooling and dicing and granular methacrylate ester resin composition.
The present invention also can optionally add ultraviolet light absorber, fluorescer, antioxidant, plasticizer and pigment etc. except adding inorganic fine particles and lubrication prescription.
When utilizing methacrylate ester resin composition of the present invention to be made as resin plate (light guide plate), viewpoint based on a large amount of productions and operation ease, be fabricated to preferable with the extrusion forming process, promptly, aforementioned prepared methacrylate ester resin composition mixed melting in extruder, from the extrusion of T die head, in regular turn by being configured as tabular through having between thermoregulator 3～5 polishing rolls, its forming board is simultaneously cooled off with drawing of guide roll by going up of guiding roller, solidify, cut into particular length in horizontal cross direction and flow direction, can obtain the goods of resin extrusion plate.In addition, can make desired thickness by crack and pull speed between the adjusting polishing roll, general light guide plate is the thick resin extrusion plate of 2～15mm.
[assay method that average luminance and briliancy are all spent together]
Utilize aforementioned extrusion to make resin plate, its back side becomes light guide plate after via net-point printing, and with the state setting as shown in Figure 1 of this light guide plate, wherein, the both sides of light guide plate 3 are provided with cold cathode fluorescent lamp 1 respectively, light guide plate is of a size of 19 "; there is a light reflecting board 4 below of light guide plate 3; on the top be arranged in parallel in regular turn; following diffusion barrier 5; and brightness enhancement film (BEF) 6; what cold cathode fluorescent lamp 1 was lighted is back in the brightness photometer CS-1000 of distance light guide plate top 50cm place placement Konica Minolta corporate system, setting obtains 81 briliancy and obtains its arithmetic mean value, is average luminance (nds).Again this 81 minimum value and peaked ratio be briliancy all together the degree (%).
[low-molecular weight polymer content]
Made methacrylate ester resin composition is dissolved in the tetrahydrofuran (being called for short THF), is analytical standard with gel dialysis process (being called for short GPC) employing polystyrene again, measures according to following condition:
Tubing string: KD-806M
Detector: RI-410, UV-486
Mobile phase: THF (flow velocity 1.0c.c./min)
Result by gpc analysis, molecular weight 2,000～600, the total integral area of 000 methacrylate ester resin (A) signal is used as 100%, can calculate wherein the shared ratio of integral area of 2000～20000 low-molecular weight polymer, be the content (weight %) of the low-molecular weight polymer of the weight average molecular weight 2000～20000 in the methacrylate ester resin (A).
Synthesizing of synthesis example 1, methacrylate ester resin (A1)
Methyl methacrylate 97 weight portions, methyl acrylate 3 weight portions, n-dodecyl mercaptan 0.25 weight portion, 2,2 '-after azobis isobutyronitrile 0.15 weight portion and toluene 200 weight portions mix, send into a reactive tank continuously and carry out the continuous solution polymerization reaction.This reactive tank has heat kerosene round-robin interlayer, and temperature of reaction maintains 100 ℃, and pressure is 600Torr.Fully stirring in the reactive tank evenly mixes each composition, and polymer solution is heated to after 265 ℃ the degassing extruder of sending into the attached degassing mouthful in decompression down continuously, vacuum tightness maintains 100Torr, after the polymer solution devolatilization, can get molten state methacrylate ester resin (A1).
Synthesizing of synthesis example 2, methacrylate ester resin (A2)
Methyl methacrylate 97 weight portions, methyl acrylate 3 weight portions, n-dodecyl mercaptan 0.27 weight portion, 2,2 '-after azobis isobutyronitrile 0.17 weight portion and toluene 200 weight portions mix, send into a reactive tank continuously and carry out the continuous solution polymerization reaction.This reactive tank has heat kerosene round-robin interlayer, and temperature of reaction maintains 100 ℃, and pressure is 600Torr.Fully stirring in the reactive tank evenly mixes each composition, and polymer solution is heated to after 265 ℃ the degassing extruder of sending into the attached degassing mouthful in decompression down continuously, vacuum tightness maintains 100Torr, after the polymer solution devolatilization, can get molten state methacrylate ester resin (A2).
Synthesizing of synthesis example 3, methacrylate ester resin (A3)
Methyl methacrylate 97 weight portions, methyl acrylate 3 weight portions, n-dodecyl mercaptan 0.4 weight portion, 2,2 '-after azobis isobutyronitrile 0.25 weight portion and toluene 200 weight portions mix, send into a reactive tank continuously and carry out the continuous solution polymerization reaction.This reactive tank has heat kerosene round-robin interlayer, and temperature of reaction maintains 122 ℃, and pressure is 600Torr.Fully stirring in the reactive tank evenly mixes each composition, and polymer solution is heated to after 265 ℃ the degassing extruder of sending into the attached degassing mouthful in decompression down continuously, vacuum tightness maintains 100Torr, after the polymer solution devolatilization, can get molten state methacrylate ester resin (A3).
Synthesizing of [synthesis example 4] methacrylate ester resin (A4)
Methyl methacrylate 97 weight portions, methyl acrylate 3 weight portions, n-dodecyl mercaptan 0.08 weight portion, 2,2 '-after azobis isobutyronitrile 0.08 weight portion and toluene 200 weight portions mix, send into a reactive tank continuously and carry out the continuous solution polymerization reaction.This reactive tank has heat kerosene round-robin interlayer, and temperature of reaction maintains 80 ℃, and pressure is 600Torr.Fully stirring in the reactive tank evenly mixes each composition, and polymer solution is heated to after 265 ℃ the degassing extruder of sending into the attached degassing mouthful in decompression down continuously, vacuum tightness maintains 100Torr, after the polymer solution devolatilization, can get molten state methacrylate ester resin (A4).
Synthesis example 1 prepared methacrylate ester resin (A1) is delivered to extruder with molten condition, and add the TiO of mean grain size 0.2 μ m
23ppm and 18 pure 440ppm mix and are the strip extrusion from die head through extrusion, water-cooled, pelletizing and obtain methacrylate ester resin composition of the present invention.This methacrylate ester resin composition is 4.7 weight % with the low-molecular weight polymer content that GPC records weight average molecular weight 2000～20000, X/Y=0.64.
With prepared graininess methacrylate ester resin composition with light guide plate extruder extrusion light guide plate.190～260 ℃ of extruder temperature, the T die head of die lip aperture 8mm are with 900kg/ hour discharge-amount, get the extrusion plate through extrusion and by 4 polishing rolls.With the extrusion plate cut into fixed size and behind net-point printing, can obtain light guide plate, its briliancy is 6378nds, briliancy all together degree be 78.4%.
Embodiment 2～5 and comparative example 1～6
Method of operating with embodiment 1, difference is kind and the addition that changes kind, lubrication prescription (B) and the inorganic fine particles (C) of methacrylate ester resin (A), its GPC records the low-molecular weight polymer content of weight average molecular weight 2000～20000, and the evaluation result that X/Y, average luminance and briliancy are all spent together is stated from table 1.
The evaluation result that the proportion of composing of table 1 embodiment and comparative example, X/Y, average luminance and briliancy are all spent together
Be called for short the Chinese English name
MMA methyl methacrylate methyl methacrylate
MA methyl acrylate methyl acrylate
BS butyl stearate butyl stearate (fusing point＜40 ℃)
The two hard ester acyl ammonium ethylene bis stearyl amide of EBA ethylene (fusing point＞85 ℃)
Claims (12)
1, a kind of methacrylate ester resin composition for light plate, it comprises:
Methacrylate ester resin (A);
Inorganic fine particles (B); And
Lubrication prescription (C);
Wherein, this inorganic fine particles (B) content is 0.05～20ppm of methacrylate ester resin (A) weight, and the mean grain size of this inorganic fine particles (B) is 0.05～15 μ m; This lubrication prescription (C) fusing point is 40～85 ℃, and content is 50～3000ppm of methacrylate ester resin (A) weight, and this methacrylate ester resin (A) contains low-molecular weight polymer 2～8 weight % of weight average molecular weight 2000～20000.
2, methacrylate ester resin composition for light plate as claimed in claim 1, wherein, this inorganic fine particles (B) content is 0.1～15ppm of methacrylate ester resin (A) weight.
3, methacrylate ester resin composition for light plate as claimed in claim 2, wherein, this inorganic fine particles (B) content is 0.3～4ppm of methacrylate ester resin (A) weight.
4, methacrylate ester resin composition for light plate as claimed in claim 1, wherein, this methacrylate ester resin (A) contains low-molecular weight polymer 3～6.5 weight % of weight average molecular weight 2000～20000.
5, methacrylate ester resin composition for light plate as claimed in claim 1, wherein, this lubrication prescription (C) content is 200～800ppm of methacrylate ester resin (A) weight.
6, methacrylate ester resin composition for light plate as claimed in claim 1, wherein, this lubrication prescription (C) fusing point is 45～80 ℃.
7, methacrylate ester resin composition for light plate as claimed in claim 1, wherein, this inorganic fine particles (B) content is the Xppm of methacrylate ester resin (A) weight, the content that this methacrylate ester resin (A) contains the low-molecular weight polymer of weight average molecular weight 2000～20000 is Y weight %, X/Y=0.03～3.0.
8, methacrylate ester resin composition for light plate as claimed in claim 7, wherein, X/Y=0.05～2.0.
9, methacrylate ester resin composition for light plate as claimed in claim 1, wherein, this methacrylate ester resin (A) is to make with the continuous solution polymerization method.
10, methacrylate ester resin composition for light plate as claimed in claim 1, wherein, this light guide plate is to make with the extrusion forming process.
11, methacrylate ester resin composition for light plate as claimed in claim 1, wherein, the mean grain size of this inorganic fine particles (B) is 0.12～5.0 μ m.
12, as claim 1 or 11 described methacrylate ester resin composition for light plate, wherein, the mean grain size of this inorganic fine particles (B) is 0.15～1.0 μ m.
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| CN200710130096A CN100590459C (en) | 2007-07-30 | 2007-07-30 | Methacrylate methacrylic ester class resin composition used for light guiding plate |
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|---|---|---|---|
| CN200710130096A CN100590459C (en) | 2007-07-30 | 2007-07-30 | Methacrylate methacrylic ester class resin composition used for light guiding plate |
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| CN100590459C true CN100590459C (en) | 2010-02-17 |
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| CN102108173B (en) * | 2011-02-22 | 2012-05-09 | 常州丰盛光电科技股份有限公司 | Manufacturing method of high-brightness light guide plate |
| TWI483040B (en) * | 2012-08-16 | 2015-05-01 | Chi Mei Corp | Light guide plate, light-emitting unit and liquid crystal display device having the same |
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Application publication date: 20090204 Assignee: Zhenjiang Chi Mei Chemical Co., Ltd. Assignor: Qimei Industry Co., Ltd. Contract record no.: 2010990000131 Denomination of invention: Methacrylate ester resin composition for light plate Granted publication date: 20100217 License type: Exclusive License Record date: 20100318 |
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