JPH0632973A - Light-scattering polycarbonate resin composition - Google Patents
Light-scattering polycarbonate resin compositionInfo
- Publication number
- JPH0632973A JPH0632973A JP19388092A JP19388092A JPH0632973A JP H0632973 A JPH0632973 A JP H0632973A JP 19388092 A JP19388092 A JP 19388092A JP 19388092 A JP19388092 A JP 19388092A JP H0632973 A JPH0632973 A JP H0632973A
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- light
- polycarbonate resin
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Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は高い光拡散性を有し、且
つ高い光線透過率をも兼ね備えた光拡散性ポリカーボネ
ート樹脂組成物に関する。本発明の組成物を使用する事
によって得られた光拡散性ポリカーボネート樹脂成形体
は、後ろに設けられた光源の像を点滅に関係なく見えな
くし、かつ光源から発せられる光を一様な明るさに拡散
透過させるため、看板、照明具、表示灯などの保護カバ
ー、液晶用バックライト拡散板や表示パネル等の光学用
途等に好適に用いられる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light diffusing polycarbonate resin composition having a high light diffusing property and a high light transmittance. The light-diffusing polycarbonate resin molded body obtained by using the composition of the present invention makes the image of the light source provided behind it invisible regardless of blinking, and makes the light emitted from the light source have a uniform brightness. Since it is diffused and transmitted through, it is preferably used for protective applications such as signboards, illuminators, and indicator lights, and optical applications such as liquid crystal backlight diffuser plates and display panels.
【0002】[0002]
【従来の技術】従来、光拡散板の基材樹脂としてはアク
リル樹脂が使用されているが、最近では市場ニーズの多
様化から耐熱性、機械的物性、難燃性等の向上や軽量化
が望まれている。光拡散性能を賦与する手段としては、
基材樹脂にガラス繊維、硫酸バリウム、酸化チタン、タ
ルク等の無機充填物を分散させるか、又はエンボスロー
ル等の加工機により表面に機械的にエンボス加工を施す
方法が一般的である。2. Description of the Related Art Conventionally, an acrylic resin has been used as a base resin for a light diffusing plate, but recently, due to diversifying market needs, improvement in heat resistance, mechanical properties, flame retardancy, etc. and weight reduction have been achieved. Is desired. As means for imparting light diffusion performance,
A general method is to disperse an inorganic filler such as glass fiber, barium sulfate, titanium oxide, or talc in the base resin, or mechanically emboss the surface with a processing machine such as an embossing roll.
【0003】しかしながら、無機充填物を添加した場合
には、一般に光線透過率を著しく低下させ、またポリカ
ーボネート樹脂の加水分解による分子量低下や着色等の
問題がある。特に、ガラス繊維を使用した場合は成形の
際に樹脂の流れ方向にガラス繊維の配向を生じたり、ま
た成形品の表面にガラス繊維が浮き出して外観を損なう
場合がある。更に、成形の際にガラス繊維によって成形
機のシリンダーやスクリューを摩耗してしまう。一方、
機械的な手法では、ある程度光拡散効果のある成形体は
得られても、二次加工した場合に表面の凹凸が失われ
て、光拡散性が低下する欠点があった。However, when the inorganic filler is added, there are problems that the light transmittance is generally remarkably reduced, and the molecular weight is reduced and the coloring is caused by the hydrolysis of the polycarbonate resin. In particular, when glass fibers are used, the glass fibers may be oriented in the resin flow direction during molding, or the glass fibers may float on the surface of the molded product, impairing the appearance. Further, the glass fibers wear the cylinders and screws of the molding machine during molding. on the other hand,
Although a mechanical method can obtain a molded article having a light diffusing effect to some extent, it has a drawback that surface irregularity is lost when the secondary processing is performed and the light diffusing property is reduced.
【0004】[0004]
【発明が解決しようとする課題】本発明の目的は、従来
技術における上記したような課題を解決し、均一で優れ
た光拡散性と高光線透過率と兼ね備え、耐熱性、機械的
物性、難燃性に優れ、フィルムにも成形可能であり、し
かも二次加工後においても、光拡散性が消失しない光拡
散透過用樹脂組成物を提供することにある。The object of the present invention is to solve the above-mentioned problems in the prior art, to provide uniform and excellent light diffusivity and high light transmittance, heat resistance, mechanical properties and difficulty. An object of the present invention is to provide a resin composition for light diffusion and transmission, which has excellent flammability, can be formed into a film, and does not lose its light diffusion property even after secondary processing.
【0005】[0005]
【課題を解決するための手段】発明者らは、光拡散性ポ
リカーボネート樹脂組成物について鋭意検討した結果、
アクリル樹脂の透明性と両樹脂間の屈折率の差に着目
し、ポリカーボネート樹脂にビーズ状の架橋構造を有す
るアクリル樹脂を配合して、その樹脂組成物を成形する
ことによって上記課題を解決し得る事を見い出し、本発
明に到達した。すなわち、本発明は、ポリカーボネート
樹脂(A)100重量部に対し、下記の成分からなる非
架橋性モノマー(イ)100重量部に架橋モノマー
(ロ)0.5〜10重量部を配合して懸濁重合して得ら
れる粒子径1〜20μmのビーズ状架橋アクリル樹脂
(B)を1〜30重量部配合して得られる光拡散性ポリ
カーボネート樹脂組成物に関するものである。 (イ)非架橋性モノマー アクリル系モノマー 50〜100重量% 芳香族ビニルモノマー 0〜 50重量% その他のビニルモノマー 0〜 20重量%Means for Solving the Problems As a result of intensive studies on the light diffusing polycarbonate resin composition, the inventors have found that
Focusing on the transparency of the acrylic resin and the difference in the refractive index between the two resins, the acrylic resin having a bead-like crosslinked structure is blended with the polycarbonate resin, and the above-mentioned problems can be solved by molding the resin composition. They found things and reached the present invention. That is, in the present invention, 100 parts by weight of the polycarbonate resin (A) is mixed with 100 parts by weight of the non-crosslinking monomer (a) containing 0.5 to 10 parts by weight of the crosslinking monomer (b). The present invention relates to a light diffusing polycarbonate resin composition obtained by blending 1 to 30 parts by weight of a bead-shaped crosslinked acrylic resin (B) having a particle diameter of 1 to 20 μm obtained by turbid polymerization. (A) Non-crosslinkable monomer Acrylic monomer 50 to 100% by weight Aromatic vinyl monomer 0 to 50% by weight Other vinyl monomer 0 to 20% by weight
【0006】本発明で使用するポリカーボネート樹脂
(A)は、芳香族ジヒドロキシ化合物とホスゲン又は炭
酸ジエステルとを溶融法又は溶液法で反応させて製造さ
れるものである。芳香族ジヒドロキシ化合物の代表的な
例として、2,2-ビス(4-ヒドロキシフェニル)プロパン
(=ビスフェノールA)、1,1-ビス(4-ヒドロキシフェ
ニル)エタン、1,1-ビス(4-ヒドロキシフェニル)シク
ロヘキサン、2,2-ビス(4-ヒドロキシ-3,5-ジメチルフ
ェニル)プロパン、2,2-ビス(4-ヒドロキ-3-メチルフ
ェニル)プロパン、ビス(4-ヒドロキシフェニル)サル
ファイドビス(4-ヒドロキシフェニル)スルホン等が例
示でき、これらの中でも特にビスフェノールAが好まし
い。The polycarbonate resin (A) used in the present invention is produced by reacting an aromatic dihydroxy compound with phosgene or a carbonic acid diester by a melting method or a solution method. As typical examples of aromatic dihydroxy compounds, 2,2-bis (4-hydroxyphenyl) propane (= bisphenol A), 1,1-bis (4-hydroxyphenyl) ethane, 1,1-bis (4- Hydroxyphenyl) cyclohexane, 2,2-bis (4-hydroxy-3,5-dimethylphenyl) propane, 2,2-bis (4-hydroxy-3-methylphenyl) propane, bis (4-hydroxyphenyl) sulfidebis Examples thereof include (4-hydroxyphenyl) sulfone, and among these, bisphenol A is particularly preferable.
【0007】又、本発明で使用するビーズ状架橋アクリ
ル樹脂(B)は、下記の成分からなる(イ)非架橋性モ
ノマー100重量部に(ロ)架橋モノマーを0.5〜1
0重量部を懸濁重合して得られる。上記(イ)非架橋性
モノマーは下記の成分を以下の配合したものである。 アクリル系モノマー 50〜100重量% 芳香族ビニルモノマー 0〜 50重量% その他のビニルモノマー 0〜 20重量%The bead-shaped crosslinked acrylic resin (B) used in the present invention contains 0.5 to 1 of (b) the crosslinking monomer in 100 parts by weight of the non-crosslinkable monomer (a) consisting of the following components.
It is obtained by suspension polymerization of 0 part by weight. The above-mentioned (a) non-crosslinkable monomer is a mixture of the following components as follows. Acrylic monomer 50-100% by weight Aromatic vinyl monomer 0-50% by weight Other vinyl monomer 0-20% by weight
【0008】上記アクリル系モノマーとしては、メチ
ルアクリレート、エチルアクリレート、プロピルアクリ
レート、ブチルアクリレート、2−エチル−ヘキシルア
クリレート、メチルメタアクリレート、エチルメタアク
リレート、プロピルメタアクリレート、ブチルメタアク
リレート等を単独或いは混合して用いることが可能であ
るが、メチルメタアクリレートが特に好ましい。As the acrylic monomer, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, 2-ethyl-hexyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, etc. may be used alone or in combination. However, methylmethacrylate is particularly preferable.
【0009】上記芳香族ビニルモノマーは、非架橋性
モノマー中で50重量%を超えない範囲で用いることが
可能であり、具体的にはスチレン、α−メチルスチレ
ン、ビニルトルエン等が例示できる。上記50重量%を
こえるとポリカーボネート樹脂の屈折率に近似してくる
ため光拡散効果が期待できない。The above-mentioned aromatic vinyl monomer can be used in a range not exceeding 50% by weight in the non-crosslinking monomer, and specific examples thereof include styrene, α-methylstyrene and vinyltoluene. When it exceeds 50% by weight, the light diffusing effect cannot be expected because it is close to the refractive index of the polycarbonate resin.
【0010】上記その他のビニルモノマーは特に用い
なくてもよいが、非架橋性モノマー中で20重量%を超
えない範囲で用いることが可能であり、具体的にはフマ
ール酸、マレイン酸等の共重合可能なカルボン酸および
そのエステルが例示できる。The above-mentioned other vinyl monomers may not be particularly used, but they can be used in a range not exceeding 20% by weight in the non-crosslinking monomer. Specifically, fumaric acid, maleic acid and the like are used together. Polymerizable carboxylic acid and its ester can be illustrated.
【0011】本発明で使用する(ロ)架橋性モノマーと
しては、分子内に2個以上の不飽和結合を持つ化合物が
用いられるが、特にその2個以上の不飽和結合のうちの
少なくとも1個がアリル基を有するものが望ましい。架
橋性モノマー(ロ)として、アリルメタクリレート、ト
リアリルシアヌレート、トリアリルイソシアネート、エ
チレングリコールジメタクリレート、プロピレングリコ
ールジアリルエーテル、ジビニルベンゼン、ジエチレン
グリコールジメタクリレート、1,6−ヘキサンビオー
ルジメタアクリレート等が例示できる。As the (b) crosslinkable monomer used in the present invention, a compound having two or more unsaturated bonds in the molecule is used. Particularly, at least one of the two or more unsaturated bonds is used. Having an allyl group is desirable. Examples of the crosslinkable monomer (b) include allyl methacrylate, triallyl cyanurate, triallyl isocyanate, ethylene glycol dimethacrylate, propylene glycol diallyl ether, divinylbenzene, diethylene glycol dimethacrylate, and 1,6-hexanebiol dimethacrylate. .
【0012】上記架橋性モノマーの添加量は、前記非架
橋性モノマーの合計量100重量部当たり0.5〜10
重量部、好ましくは1〜5重量部である。である。上記
0.5重量部未満であると架橋が不完全なため得られる
ビーズの耐熱性が低く、成形加工後ビーズが変形を起こ
すおそれがある。一方、上記20重量部を超えても特に
光拡散効果を促進させるものではなく、経済上不利とな
る。The amount of the crosslinkable monomer added is 0.5 to 10 per 100 parts by weight of the total amount of the non-crosslinkable monomers.
Parts by weight, preferably 1 to 5 parts by weight. Is. If the amount is less than 0.5 part by weight, the heat resistance of the obtained beads is low due to incomplete crosslinking, and the beads may be deformed after molding. On the other hand, if the amount exceeds 20 parts by weight, the light diffusion effect is not particularly promoted, which is economically disadvantageous.
【0013】本発明で使用するビーズ状架橋アクリル樹
脂(B)は、前記(イ)非架橋モノマーと(ロ)架橋モ
ノマーを一定割合に配合し、通常の懸濁重合法により製
造される。本発明において、架橋ポリマーの平均粒子径
は1〜20μmが好ましい。平均粒子径が上記20μm
を超えると得られる成形体表面が粗い状態となり、、一
方、平均粒子径が上記1μm未満では十分な光拡散効果
は得られない。又、架橋ポリマーの粒子径は粒子全体の
80%以上が上記1〜20μmの範囲内にあるのが特に
望ましい。The bead-shaped crosslinked acrylic resin (B) used in the present invention is produced by a conventional suspension polymerization method by blending the non-crosslinking monomer (a) and the crosslinking monomer (b) in a fixed ratio. In the present invention, the average particle size of the crosslinked polymer is preferably 1 to 20 μm. The average particle size is 20 μm above
When the average particle size is less than 1 μm, a sufficient light diffusion effect cannot be obtained. Further, it is particularly desirable that 80% or more of the particle diameter of the cross-linked polymer is within the above range of 1 to 20 μm.
【0014】架橋アクリル樹脂は、基材樹脂としておポ
リカーボネート樹脂100重量部に対して、1〜30重
量部の割合で配合される。架橋アクリル樹脂の配合割合
が上記1重量部より少ないと十分な光拡散効果が得られ
ず、一方、上記30重量部を超えて配合しても光拡散性
能等を特に向上させるものでなく、光線透過率、外観、
物性低下、経済性等により不都合を生ずる。The crosslinked acrylic resin is blended as a base resin in an amount of 1 to 30 parts by weight based on 100 parts by weight of the polycarbonate resin. If the blending ratio of the crosslinked acrylic resin is less than 1 part by weight, a sufficient light diffusion effect cannot be obtained, while if it is blended in excess of 30 parts by weight, it does not particularly improve the light diffusing performance. Transmittance, appearance,
Inconvenience occurs due to deterioration of physical properties, economy, etc.
【0015】尚、本発明の光拡散性樹脂組成物に本発明
の目的を損なわない範囲で、難燃性、安定剤、顔料、染
料、骨材、繊維強化材等の各種添加剤等を配合すること
ができる。本発明の光拡散性樹脂組成物を調整するにあ
たっては、従来公知の方法が採用されればよく、押出
機、バンバリーミキサー、ロール等で混練する方法が適
宜選択される。The light-diffusing resin composition of the present invention may be mixed with various additives such as flame retardant, stabilizer, pigment, dye, aggregate, fiber reinforced material, etc. within a range that does not impair the object of the present invention. can do. In preparing the light diffusing resin composition of the present invention, a conventionally known method may be adopted, and a method of kneading with an extruder, a Banbury mixer, a roll or the like is appropriately selected.
【0016】[0016]
【実施例】次に実施例によって本発明を具体的に説明す
る。尚、各物性値の測定は、下記の方法を採用した。 1)全光線透過率、曇価 日本電色工業(株)製ヘーズメーターで測定 2)拡散率 村上色彩技術研究所(株)製自動変角光度計で透過法に
て測定した。 拡散率(%) =(100) ×(20゜輝度値+70゜輝度値)/(5
゜の輝度値×2) 3)分散度 分散度:光を試料に当てた際、γ=0゜(直線方向)時
の透過光量を100とした場合、透過光量が50になる
ときのγの角度(直線方向との角度)。EXAMPLES The present invention will be described in detail with reference to examples. The following methods were adopted for the measurement of each physical property value. 1) Total light transmittance, haze value Measured by a haze meter manufactured by Nippon Denshoku Industries Co., Ltd. 2) Diffusivity Measured by a transmission method using an automatic goniophotometer manufactured by Murakami Color Research Laboratory Co., Ltd. Diffusivity (%) = (100) x (20 ° brightness value + 70 ° brightness value) / (5
Luminance value x 2) 3) Dispersion Dispersion: When the amount of transmitted light when γ = 0 ° (linear direction) is 100 when light is applied to the sample, γ when the transmitted light amount becomes 50 Angle (angle with linear direction).
【0017】実施例1 ポリカーボネート樹脂(三菱瓦斯化学(株)製、商品
名:ユーピロンE−2000F)100重量部に対し、
光拡散剤として平均粒子径13μmの架橋アクリル樹脂
(綜研化学(株)製、MR−13G)5重量部をミキサ
ーで混合攪拌し、ベント押出機にてTダイスを通して押
出し、三本ロールにより厚さ1.0mmの押出板に加工
した。この押出板の全光線透過率は80%、曇価は92
%、拡散率は46%、分散度は28゜であった。また、
成形物の後方に光源を置いて、目視で光拡散性を観察し
たが、光源の像は認められなかった。評価結果を表1に
まとめて示す。Example 1 100 parts by weight of a polycarbonate resin (trade name: Iupilon E-2000F, manufactured by Mitsubishi Gas Chemical Co., Inc.),
As a light diffusing agent, 5 parts by weight of a crosslinked acrylic resin (MR-13G, manufactured by Soken Chemical Industry Co., Ltd.) having an average particle diameter of 13 μm was mixed and stirred with a mixer, and the mixture was extruded through a T-die with a vent extruder, and the thickness was three rolls. It was processed into a 1.0 mm extruded plate. This extruded plate has a total light transmittance of 80% and a haze value of 92.
%, The diffusivity was 46%, and the dispersity was 28 °. Also,
A light source was placed behind the molded product and the light diffusion property was visually observed, but no image of the light source was observed. The evaluation results are summarized in Table 1.
【0018】実施例2 実施例1の樹脂組成物に更に顔料として、酸化チタンを
0.3重量部添加した以外は実施例1と同様にして押出
板を得た。この押出板の全光線透過率は66%、曇価は
92%、拡散率は57%、分散度は32°であった。押
出板の表面状態は実施例1の押出板と同様であり、良好
な乳白板が得られた。評価結果を表1にまとめて示す。Example 2 An extruded plate was obtained in the same manner as in Example 1 except that 0.3 part by weight of titanium oxide was further added as a pigment to the resin composition of Example 1. The extruded plate had a total light transmittance of 66%, a haze value of 92%, a diffusivity of 57%, and a dispersity of 32 °. The surface condition of the extruded plate was the same as that of the extruded plate of Example 1, and a good opalescent plate was obtained. The evaluation results are summarized in Table 1.
【0019】比較例1 光拡散剤として繊維径10μm、繊維長100〜200
μmのガラス短繊維を15重量部、顔料として酸化チタ
ンを0.3重量部使用した以外は実施例1と同様にて押
出板とした。この押出板の全光線透過率は57%、曇価
は92%、拡散率は39%、分散度は19゜であり架橋
アクリル樹脂の3倍量に相当するガラス短繊維を添加し
たにもかかわらず光拡散性は劣っていた。また、押出板
の表面状態はガラス繊維による凹凸が現れた。評価結果
を表1にまとめて示す。Comparative Example 1 As a light diffusing agent, the fiber diameter was 10 μm and the fiber length was 100 to 200.
An extruded plate was prepared in the same manner as in Example 1 except that 15 parts by weight of short glass fiber having a diameter of μm and 0.3 part by weight of titanium oxide were used as a pigment. The extruded plate had a total light transmittance of 57%, a haze value of 92%, a diffusivity of 39%, and a dispersity of 19 °, even though glass short fibers corresponding to three times the amount of the crosslinked acrylic resin were added. The light diffusion was poor. Further, the surface condition of the extruded plate showed irregularities due to the glass fiber. The evaluation results are summarized in Table 1.
【0020】[0020]
【表1】 全光線透 曇価 拡散率 分散度 板厚 過率(%) (%) (%) (゜) (mm) 実施例1 80 92 46 28 1.0 実施例2 66 92 57 32 1.0 比較例1 57 92 39 19 1.0 [Table 1] Total light transmittance Haze value Diffusivity Dispersity Plate thickness excess rate (%) (%) (%) (°) (mm) Example 1 80 92 46 28 28 1.0 Example 2 66 92 57 32 32 1.0 Comparative example 1 57 92 39 19 1.0
【0021】[0021]
【発明の効果】発明の効果を列挙すれば、以下の通りで
ある。 (1)従来法よりも少ない拡散剤の添加量で、高い光線
透過率と均一で優れた光拡散性能を兼備できる。 (2)ポリカーボネート樹脂の加水分解による分子量低
下や着色を起こさない。 (3)成形加工をポリカーボネート樹脂単独の場合とほ
ぼ同様に行うことができる。 (4)成形機のシリンダーやスクリューの摩耗が少なく
なる。The effects of the present invention are listed below. (1) A high light transmittance and a uniform and excellent light diffusing performance can be obtained by adding a smaller amount of diffusing agent than the conventional method. (2) No reduction in molecular weight or coloring due to hydrolysis of the polycarbonate resin. (3) The molding process can be performed in substantially the same manner as the case of using the polycarbonate resin alone. (4) The wear of the cylinder and the screw of the molding machine is reduced.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 井上 昇一 神奈川県平塚市東八幡5丁目6番2号 三 菱瓦斯化学株式会社プラスチックスセンタ ー内 ─────────────────────────────────────────────────── --Continued front page (72) Inventor Shoichi Inoue 5-6-2 Higashi-Hachiman, Hiratsuka-shi, Kanagawa Sanryo Gas Chemical Co., Ltd. Plastics Center
Claims (1)
部に対し、下記の成分からなる非架橋性モノマー(イ)
100重量部に架橋モノマー(ロ)0.5〜10重量部
を配合して懸濁重合して得られる平均粒子径1〜20μ
mのビーズ状架橋アクリル樹脂(B)を1〜30重量部
配合して得られる光拡散性ポリカーボネート樹脂組成
物。 (イ)非架橋性モノマーの配合割合 アクリル系モノマー 50〜100重量% 芳香族ビニルモノマー 0〜 50重量% その他のビニルモノマー 0〜 20重量%1. A non-crosslinking monomer (a) comprising the following components per 100 parts by weight of a polycarbonate resin (A).
An average particle size of 1 to 20 μm obtained by suspension polymerization of 100 parts by weight of 0.5 to 10 parts by weight of the crosslinking monomer (b).
A light-diffusing polycarbonate resin composition obtained by mixing 1 to 30 parts by weight of the bead-shaped crosslinked acrylic resin (B) of m. (A) Blending ratio of non-crosslinkable monomer Acrylic monomer 50 to 100% by weight Aromatic vinyl monomer 0 to 50% by weight Other vinyl monomer 0 to 20% by weight
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19388092A JPH0632973A (en) | 1992-07-21 | 1992-07-21 | Light-scattering polycarbonate resin composition |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19388092A JPH0632973A (en) | 1992-07-21 | 1992-07-21 | Light-scattering polycarbonate resin composition |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0632973A true JPH0632973A (en) | 1994-02-08 |
Family
ID=16315280
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19388092A Pending JPH0632973A (en) | 1992-07-21 | 1992-07-21 | Light-scattering polycarbonate resin composition |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0632973A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004034136A1 (en) * | 2002-10-03 | 2004-04-22 | General Electric Company | Bulk diffuser for flat panel display |
JP2006030839A (en) * | 2004-07-21 | 2006-02-02 | Sumitomo Dow Ltd | Polycarbonate resin light diffusion plate |
JP2006131833A (en) * | 2004-11-09 | 2006-05-25 | Mitsubishi Engineering Plastics Corp | Light-diffusible polycarbonate resin composition and molded article |
US7341784B2 (en) | 2004-09-10 | 2008-03-11 | General Electric Company | Light management film and its preparation and use |
JP2009512747A (en) * | 2005-10-19 | 2009-03-26 | バイエル・マテリアルサイエンス・アクチェンゲゼルシャフト | Light scattering film and its use in flat screen |
US7674506B2 (en) | 2003-06-17 | 2010-03-09 | Teijin Chemicals, Ltd. | Direct back light type liquid crystal display and light diffuse plate |
JP2010229193A (en) * | 2009-03-26 | 2010-10-14 | Mitsubishi Engineering Plastics Corp | Light-diffusing polycarbonate resin composition |
-
1992
- 1992-07-21 JP JP19388092A patent/JPH0632973A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004034136A1 (en) * | 2002-10-03 | 2004-04-22 | General Electric Company | Bulk diffuser for flat panel display |
US6908202B2 (en) | 2002-10-03 | 2005-06-21 | General Electric Company | Bulk diffuser for flat panel display |
US7674506B2 (en) | 2003-06-17 | 2010-03-09 | Teijin Chemicals, Ltd. | Direct back light type liquid crystal display and light diffuse plate |
JP2006030839A (en) * | 2004-07-21 | 2006-02-02 | Sumitomo Dow Ltd | Polycarbonate resin light diffusion plate |
US7341784B2 (en) | 2004-09-10 | 2008-03-11 | General Electric Company | Light management film and its preparation and use |
JP2006131833A (en) * | 2004-11-09 | 2006-05-25 | Mitsubishi Engineering Plastics Corp | Light-diffusible polycarbonate resin composition and molded article |
JP4625680B2 (en) * | 2004-11-09 | 2011-02-02 | 三菱エンジニアリングプラスチックス株式会社 | Light diffusive molding |
JP2009512747A (en) * | 2005-10-19 | 2009-03-26 | バイエル・マテリアルサイエンス・アクチェンゲゼルシャフト | Light scattering film and its use in flat screen |
JP2010229193A (en) * | 2009-03-26 | 2010-10-14 | Mitsubishi Engineering Plastics Corp | Light-diffusing polycarbonate resin composition |
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