JP2005267971A - Methacrylate resin composition for cover of lighting device, and cover of lighting device - Google Patents

Methacrylate resin composition for cover of lighting device, and cover of lighting device Download PDF

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JP2005267971A
JP2005267971A JP2004076778A JP2004076778A JP2005267971A JP 2005267971 A JP2005267971 A JP 2005267971A JP 2004076778 A JP2004076778 A JP 2004076778A JP 2004076778 A JP2004076778 A JP 2004076778A JP 2005267971 A JP2005267971 A JP 2005267971A
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resin composition
cover
mass
lighting device
color
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Tadayoshi Sawada
忠義 澤田
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Mitsubishi Rayon Co Ltd
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Mitsubishi Rayon Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To develop a methacrylate resin composition for a cover of lighting device having good design and weathering property. <P>SOLUTION: The methacrylate resin composition for a cover of lighting device contains a light diffusing agent by 0.1 to 10 parts by mass and perylene-based phosphor dyestuff by 0.0001 to 0.005 parts by mass in 100 parts by mass of methacrylate resin. The cover of lighting device having good design and weathering property is formed by using the methacrylate resin composition. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、優れた意匠性及び耐候性を有する照明カバー用メタクリル系樹脂組成物に関する。   The present invention relates to a methacrylic resin composition for lighting covers having excellent design properties and weather resistance.

メタクリル系樹脂は、光学特性、耐候性に優れた樹脂であり、その特性を生かして照明器具のカバー等に利用される。照明カバー用途においては、明るさのための光の透過性と、光源の透け防止及び防眩性のために光の均一な拡散性が求められる。
近年、これら光の透過拡散性だけでなく、快適な空間を演出するための照明の色に関する要望も増えている。例えば、青系のすっきりした清涼感のある色や、緑系の自然で落ち着いた色、赤系の暖かみのある色など、利用者の好みに応じて様々な色の照明が使用されている。このような照明器具を作るために、一般的には様々な相関色温度(以下色温度と称する)を有する光源を用いることが行われる。例えば、電球色、昼白色、昼光色といった様々な色温度を有する蛍光ランプが市販されている。
A methacrylic resin is a resin excellent in optical characteristics and weather resistance, and is used for a cover of a lighting fixture by utilizing the characteristics. In lighting cover applications, uniform light diffusibility is required for light transmittance for brightness and prevention of light source transparency and antiglare.
In recent years, there is an increasing demand for not only the light diffusibility of light but also the color of illumination for producing a comfortable space. For example, various colors of illumination are used according to the user's preference, such as a refreshing blue-based refreshing color, a green-based natural and calm color, and a red-based warm color. In order to make such a luminaire, generally, a light source having various correlated color temperatures (hereinafter referred to as color temperatures) is used. For example, fluorescent lamps having various color temperatures such as a light bulb color, a neutral white color, and a daylight color are commercially available.

光源の色温度を変えるだけでなく、照明カバーに着色を施すことも行われるが、着色することは透過率が低下する(暗くなる)ことであるため、濃い着色が行われることはほとんどない。明るさをできるだけ損ねずに着色する方法として、蛍光体を添加する方法がある。蛍光体は、特定の波長の光を吸収して別の波長(可視光域)の光を発する(蛍光)ため、人間の目には透過率などの数値以上の明るさが感じられる。   In addition to changing the color temperature of the light source, the lighting cover is also colored. However, since coloring is a decrease in transmittance (darkening), dark coloring is rarely performed. As a method for coloring without impairing the brightness as much as possible, there is a method of adding a phosphor. Since the phosphor absorbs light of a specific wavelength and emits light of another wavelength (visible light region) (fluorescence), the human eye feels brightness that is higher than a numerical value such as transmittance.

特許文献1には、蛍光増白剤を添加した導光板用メタクリル樹脂組成物が開示されている。蛍光増白剤は、蛍光体の一種で紫外線を吸収して可視光(青〜紫色)を発するため、照明カバーの黄色みを減らして白さを増し、照明を明るく感じさせる効果がある。しかしながら蛍光増白剤は、耐候性が悪く、長期の使用ではその効果が消失するという問題があった。また、蛍光増白剤は、青白く見せるものであり、赤、緑等の他の色に着色することはできない。   Patent Document 1 discloses a methacrylic resin composition for a light guide plate to which a fluorescent brightening agent is added. A fluorescent whitening agent is a type of phosphor that absorbs ultraviolet rays and emits visible light (blue to purple). Therefore, the fluorescent whitening agent has an effect of reducing the yellowness of the lighting cover to increase whiteness and making the lighting feel brighter. However, the optical brightener has a problem that its weather resistance is poor and its effect disappears after long-term use. In addition, the fluorescent brightening agent looks bluish and cannot be colored in other colors such as red and green.

また、特許文献2には、蛍光体と特定の紫外線吸収剤を添加したメタクリル酸メチル系樹脂組成物及びその成形体が開示されている。この樹脂組成物は、従来の光拡散剤を含有するメタクリル酸メチル系樹脂組成物が、光透過性や耐久性の点で満足されるものでなく、また、透過光が黄色を帯びることから、これらの特性を改善するために、2−(1−アリールアルキリデン)マロン酸エステルあるいはオキサルアニリド類という特定の紫外線吸収剤と蛍光体(蛍光増白剤)を添加したものである。しかし、特許文献2では、蛍光体として、オキサゾール系蛍光体が使用されており、透過光の黄色味の抑制効果は認められるものの、耐候性においては充分なものではない。   Patent Document 2 discloses a methyl methacrylate resin composition to which a phosphor and a specific ultraviolet absorber are added, and a molded product thereof. In this resin composition, the conventional methyl methacrylate resin composition containing a light diffusing agent is not satisfied in terms of light transmission and durability, and the transmitted light is yellowish, In order to improve these properties, a specific ultraviolet absorber such as 2- (1-arylalkylidene) malonic acid ester or oxalanilide and a phosphor (fluorescent whitening agent) are added. However, in Patent Document 2, an oxazole-based phosphor is used as the phosphor, and although the effect of suppressing the yellowness of transmitted light is recognized, the weather resistance is not sufficient.

特開平8−231808号公報JP-A-8-231808 特開2003−26888号公報JP 2003-26888 A

着色剤は、照明カバーの光透過率を下げて、色と明るさの両立が困難であること、また、蛍光増白剤は、明るさを得ることはできても多様な着色は難しく、また、耐候性が悪いため長期に使用する照明用途には適さないという問題がある。
そこで本発明の目的は、光拡散性がよく明るさを損なわずに、多様な着色が可能であって、かつ、耐候性に優れた照明カバー用樹脂材料を開発することにある。
Colorants reduce the light transmittance of the lighting cover, making it difficult to achieve both color and brightness. Fluorescent brighteners are able to obtain brightness but are difficult to color variously. There is a problem that it is not suitable for lighting use for a long time due to poor weather resistance.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to develop a resin material for a lighting cover that has a good light diffusibility, can be colored in various ways without impairing brightness, and has excellent weather resistance.

本発明者は、上記課題を解決するために鋭意検討した結果、ペリレン系の蛍光染料を用いることにより、様々な色温度の照明カバー製品を成形することができ、また、蛍光染料が発する蛍光により、人間の目に鮮やかで明るく感じられる照明カバー用材料として有用な樹脂組成物を見出した。本発明はかかる知見に基づくものである。
すなわち、本発明は、メタクリル系樹脂100質量部に対して、光拡散剤を0.1〜10質量部及びペリレン系蛍光染料を0.0001〜0.005質量部含有する新規なメタクリル系樹脂組成物及びかかるメタクリル系樹脂組成物を成形してなる意匠性及び耐候性に優れた照明カバー成形品を提供するものである。
As a result of intensive studies to solve the above problems, the present inventor can form lighting cover products with various color temperatures by using perylene-based fluorescent dyes, and also by the fluorescence emitted by the fluorescent dyes. The present inventors have found a resin composition useful as a lighting cover material that is vivid and bright to human eyes. The present invention is based on such knowledge.
That is, the present invention provides a novel methacrylic resin composition containing 0.1 to 10 parts by mass of a light diffusing agent and 0.0001 to 0.005 parts by mass of a perylene fluorescent dye with respect to 100 parts by mass of a methacrylic resin. It is intended to provide a lighting cover molded article excellent in design and weather resistance formed by molding a product and such a methacrylic resin composition.

本発明のメタクリル系樹脂組成物は、ペリレン系の蛍光染料の作用により様々な色を発現することが可能で、人間の目に鮮やかで明るく感じられ、さらに耐候性に優れた照明カバーを得ることができる。   The methacrylic resin composition of the present invention is capable of expressing various colors by the action of a perylene-based fluorescent dye, and provides a lighting cover that feels bright and bright to the human eye and has excellent weather resistance. Can do.

以下、本発明を詳細に説明する。
本発明においてメタクリル系樹脂とは、メタクリル酸メチルの単独重合体あるいは、メタクリル酸メチルを主成分とし、これと共重合しうる他の単量体との共重合体である。メタクリル酸メチル単位は50質量%以上、好ましくは80質量%以上、さらに好ましくは90質量%以上である。メタクリル酸メチルと共重合しうる他の単量体としては、メタクリル酸エチル、メタクリル酸ブチル、メタクリル酸シクロヘキシル、メタクリル酸フェニル、メタクリル酸ベンジル、メタクリル酸−2−エチルヘキシル、メタクリル酸−2−ヒドロキシエチル等のメタクリル酸メチル以外のメタクリル酸エステル類、アクリル酸メチル、アクリル酸エチル、アクリル酸ブチル、アクリル酸シクロヘキシル、アクリル酸フェニル、アクリル酸ベンジル、アクリル酸−2−エチルヘキシル、アクリル酸−2−ヒドロキシエチル、等のアクリル酸エステル類、メタクリル酸、アクリル酸等の不飽和酸類、スチレン、α−メチルスチレン、アクリロニトリル、メタクリロニトリル、無水マレイン酸、フェニルマレイミド、シクロヘキシルマレイミド等がある。これらは必要に応じて2種類以上用いることもできる。
Hereinafter, the present invention will be described in detail.
In the present invention, the methacrylic resin is a homopolymer of methyl methacrylate or a copolymer of methyl methacrylate as a main component and another monomer that can be copolymerized therewith. The methyl methacrylate unit is 50% by mass or more, preferably 80% by mass or more, and more preferably 90% by mass or more. Other monomers that can be copolymerized with methyl methacrylate include ethyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, phenyl methacrylate, benzyl methacrylate, 2-ethylhexyl methacrylate, 2-hydroxyethyl methacrylate. Methacrylate other than methyl methacrylate such as methyl acrylate, ethyl acrylate, butyl acrylate, cyclohexyl acrylate, phenyl acrylate, benzyl acrylate, 2-ethylhexyl acrylate, 2-hydroxyethyl acrylate , Etc., unsaturated acids such as methacrylic acid, acrylic acid, styrene, α-methylstyrene, acrylonitrile, methacrylonitrile, maleic anhydride, phenylmaleimide, cyclohexylmaleimide, etc. A. Two or more of these may be used as necessary.

本発明のメタクリル系樹脂の製造方法は、特に制限はなく、公知の重合方法である溶液重合、懸濁重合、乳化重合、塊状重合、キャスト重合等の各重合方法が利用できる。その際、アゾ系化合物、過酸化物等の重合開始剤、各種メルカプタン化合物等の分子量調節剤を適宜使用することができる。   The method for producing the methacrylic resin of the present invention is not particularly limited, and various polymerization methods such as solution polymerization, suspension polymerization, emulsion polymerization, bulk polymerization, and cast polymerization, which are known polymerization methods, can be used. In that case, polymerization initiators such as azo compounds and peroxides, and molecular weight regulators such as various mercaptan compounds can be appropriately used.

本発明に使用する光拡散剤は、メタクリル系樹脂と屈折率の異なる無機系あるいは有機系の化合物が挙げられる。無機系の光拡散剤としては、硫酸バリウム、炭酸カルシウム、酸化チタン、水酸化アルミニウム、酸化亜鉛、タルク、マイカ等が挙げられる。有機系の光拡散剤としては、スチレン系重合体粒子、アクリル系重合体粒子、シロキサン系重合体粒子等が挙げられる。光拡散剤の粒子径は、1〜10μmの範囲にある微粒子が好ましい。この範囲の粒子径をもつ光拡散剤は、光拡散性が高く、その添加量が少なくて済み効率的である。また、光拡散剤の添加量は、メタクリル系樹脂100質量部に対して0.1〜10質量部であることが好ましい。この範囲のものは光の透過性と拡散性のバランスが良く、優れた効果が得られる。   Examples of the light diffusing agent used in the present invention include inorganic or organic compounds having a refractive index different from that of the methacrylic resin. Examples of inorganic light diffusing agents include barium sulfate, calcium carbonate, titanium oxide, aluminum hydroxide, zinc oxide, talc, and mica. Examples of the organic light diffusing agent include styrene polymer particles, acrylic polymer particles, and siloxane polymer particles. The particle size of the light diffusing agent is preferably fine particles in the range of 1 to 10 μm. A light diffusing agent having a particle size in this range has high light diffusibility and requires only a small amount of addition, and is efficient. Moreover, it is preferable that the addition amount of a light-diffusion agent is 0.1-10 mass parts with respect to 100 mass parts of methacrylic resins. Those in this range have a good balance between light transmittance and diffusibility, and an excellent effect can be obtained.

本発明に使用する蛍光染料は、ペリレン系の染料である。ペリレン系の染料は、耐候性が良好であり、紫外線等にさらされても変色及び蛍光の減少が少ない。これらの染料は、BASFジャパン社からルモゲンFレッド305、ルモゲンFオレンジ240、ルモゲンFイエロー083(いずれも商品名)として市販されている。ペリレン系の染料は、レッド、オレンジ、イエロー系の発色を基本とするが、2種類以上を適宜併用することによって自由な色を発現することができる。また、蛍光染料の添加量は、メタクリル系樹脂100質量部に対して0.0001〜0.005質量部であることが好ましい。この範囲において、所望する発色及び蛍光の発現が得られ、また、照明カバーとして適当な透過性を有している。   The fluorescent dye used in the present invention is a perylene dye. Perylene-based dyes have good weather resistance, and even when exposed to ultraviolet rays or the like, discoloration and decrease in fluorescence are small. These dyes are commercially available from BASF Japan as Lumogen F Red 305, Lumogen F Orange 240, and Lumogen F Yellow 083 (all trade names). Perylene-based dyes are based on red, orange, and yellow colors, but can express a free color by appropriately using two or more kinds. Moreover, it is preferable that the addition amount of fluorescent dye is 0.0001-0.005 mass part with respect to 100 mass parts of methacrylic resin. In this range, desired color development and fluorescence expression can be obtained, and it has appropriate transparency as a lighting cover.

本発明のメタクリル系樹脂組成物を製造するには、公知の熱可塑性樹脂の混合方法を使用することができる。例えば、上記のメタクリル系樹脂、光拡散剤、蛍光染料、及び必要に応じて他の成分をヘンシェルミキサー等で混合し、一軸または二軸押出機、ニーダー等を用いて溶融混練する方法などがある。さらにこのメタクリル系樹脂組成物を照明カバーに成形するには、特に制限はなく、押出成形でシートにした後、真空成形、圧空成形等により成形するか、あるいは、異形押出成形、射出成形、プレス成形等により、成形とすることができる。   In order to produce the methacrylic resin composition of the present invention, known thermoplastic resin mixing methods can be used. For example, there is a method of mixing the above methacrylic resin, light diffusing agent, fluorescent dye, and other components as necessary with a Henschel mixer, etc., and melt-kneading using a single screw or twin screw extruder, a kneader, etc. . Further, there is no particular limitation on molding this methacrylic resin composition into a lighting cover. After forming into a sheet by extrusion molding, molding is performed by vacuum molding, pressure molding, or the like, or profile extrusion molding, injection molding, press It can be formed by molding or the like.

本発明のメタクリル系樹脂組成物には、その特性を害わない範囲で、種々の添加剤を加えることができる。例えば、ヒンダードフェノール等の酸化防止剤、ステアリルアルコール等の離型剤、ベンゾトリアゾール等の紫外線吸収剤、アルキルスルホン酸塩、ポリエーテルエステルアミド等の帯電防止剤等が挙げられる。これらの添加剤は、2種類以上併用してもよい。
さらに、本発明のメタクリル系樹脂組成物には、耐衝撃性を改良する目的でブタジエン系、アクリル系、シリコーン系等のゴム成分を配合してもよい。
Various additives can be added to the methacrylic resin composition of the present invention as long as the characteristics are not impaired. Examples thereof include antioxidants such as hindered phenols, mold release agents such as stearyl alcohol, ultraviolet absorbers such as benzotriazole, antistatic agents such as alkyl sulfonates and polyether ester amides, and the like. Two or more of these additives may be used in combination.
Further, the methacrylic resin composition of the present invention may be blended with a rubber component such as butadiene, acrylic or silicone for the purpose of improving impact resistance.

次に、実施例を挙げて本発明をさらに詳しく説明するが、本発明はこれらの実施例により限定されるものではない。
なお、実施例及び比較例における成形品の評価方法を以下に示す。試験片は、射出成形機を用いてシリンダー温度250℃、金型温度60℃で成形した平板(厚み2mm)を使用した。
EXAMPLES Next, although an Example is given and this invention is demonstrated in more detail, this invention is not limited by these Examples.
In addition, the evaluation method of the molded article in an Example and a comparative example is shown below. As the test piece, a flat plate (thickness 2 mm) molded using an injection molding machine at a cylinder temperature of 250 ° C. and a mold temperature of 60 ° C. was used.

(1)全光線透過率、曇価
JIS K7105に準拠して全光線透過率及び曇価(B法)を求めた。
照明カバーとしては、明るさのために全光線透過率が高いこと、光源の透け防止及び防眩性のために曇価が高いことが好ましい。
(1) Total light transmittance, haze value The total light transmittance and haze value (Method B) were determined according to JIS K7105.
The lighting cover preferably has a high total light transmittance for brightness, and a high haze value for prevention of light source transparency and antiglare properties.

(2)相関色温度
JIS K7105に準拠して、C光源(相関色温度6700K)、2゜視野の色度座標(x,y)を求め、JIS Z8725に準拠して相関色温度を求めた。
相関色温度が大きいと青白い色、小さいと赤い色になる。相関色温度と人間が感じる色は以下のような対応となる。
1)6000〜6700K 涼しい色(昼光色)
2)4000〜6000K 自然な色(温白色〜昼白色)
3)2800〜4000K 暖かい色(電球色〜白色)
(2) Correlated color temperature In accordance with JIS K7105, C light source (correlated color temperature 6700K), chromaticity coordinates (x, y) of 2 ° field of view were obtained, and correlated color temperature was obtained in accordance with JIS Z8725.
When the correlated color temperature is high, the color becomes pale and when it is low, the color becomes red. Correlated color temperature and color perceived by humans are as follows.
1) 6000-6700K cool color (daylight color)
2) 4000-6000K Natural color (warm white to lunch white)
3) 2800-4000K warm color (bulb color-white)

(3)蛍光持続性
サンシャインウェザーメータ(スガ試験機(株)製)を用いて、ブラックパネル温度83℃、降雨なしで2000時間暴露を行った。暴露後に蛍光を発するか否か目視で確認した。
○:蛍光あり ×:蛍光なし
(3) Fluorescence persistence Using a sunshine weather meter (manufactured by Suga Test Instruments Co., Ltd.), exposure was performed for 2000 hours at a black panel temperature of 83 ° C. without rain. It was visually confirmed whether or not fluorescence was emitted after exposure.
○: With fluorescence ×: Without fluorescence

[実施例1]
メタクリル系樹脂として、アクリペットVH(MFR=2g/10min、HDT=102℃:三菱レイヨン(株)製)100質量部、光拡散剤として硫酸バリウム(平均粒子径2μm)1質量部、蛍光染料としてルモゲンFオレンジ240(BASFジャパン(株)製)0.005質量部をヘンシェルミキサーで混合し、二軸押出機PCM30(ベント付き:池貝(株)製)を用いて、シリンダー温度250℃、スクリュー回転数250rpmで押出してペレット化した。得られたペレットを射出成形機PS60E(日精樹脂工業(株)製)を用いて試験片を作製した。この試験片を用いて上記各評価を行った。その結果を表1に示す。相関色温度は3600Kで、暖かみのある色となり、蛍光により見た目が鮮明に感じられた。蛍光は暴露後も持続していた。
[Example 1]
As a methacrylic resin, Acrypet VH (MFR = 2 g / 10 min, HDT = 102 ° C .: manufactured by Mitsubishi Rayon Co., Ltd.), 100 parts by mass, as a light diffusing agent, 1 part by mass of barium sulfate (average particle diameter: 2 μm), as a fluorescent dye Lumogen F Orange 240 (BASF Japan Co., Ltd.) 0.005 parts by mass was mixed with a Henschel mixer, and using a twin screw extruder PCM30 (with vent: Ikegai Co., Ltd.), cylinder temperature 250 ° C., screw rotation Extrusion was performed at several 250 rpm and pelletized. Test pieces were prepared from the obtained pellets using an injection molding machine PS60E (manufactured by Nissei Plastic Industry Co., Ltd.). Each of the above evaluations was performed using this test piece. The results are shown in Table 1. The correlated color temperature was 3600 K, and it became a warm color, and the appearance was clearly felt by fluorescence. Fluorescence persisted after exposure.

[実施例2]
蛍光染料としてルモゲンFオレンジ240(BASFジャパン(株)製)0.002質量部を用いた以外は実施例1と同様にして試験片を作製し、各評価を行った。その結果を表1に示す。相関色温度は4900Kで、自然な色となり、蛍光により見た目が鮮明に感じられた。蛍光は暴露後も持続していた。
[Example 2]
A test piece was prepared in the same manner as in Example 1 except that 0.002 part by mass of Lumogen F Orange 240 (manufactured by BASF Japan Ltd.) was used as the fluorescent dye, and each evaluation was performed. The results are shown in Table 1. The correlated color temperature was 4900K, and it became a natural color, and the appearance was clearly felt by fluorescence. Fluorescence persisted after exposure.

[実施例3]
蛍光染料としてルモゲンFレッド305(BASFジャパン(株)製)0.003質量部を用いた以外は実施例1と同様にして試験片を作製し、各評価を行った。その結果を表1に示す。相関色温度は6000Kで、涼しい色となり、蛍光により見た目が鮮明に感じられた。蛍光は暴露後も持続していた。
[Example 3]
A test piece was prepared in the same manner as in Example 1 except that 0.003 part by mass of Lumogen F Red 305 (manufactured by BASF Japan Ltd.) was used as a fluorescent dye, and each evaluation was performed. The results are shown in Table 1. The correlated color temperature was 6000 K, a cool color was obtained, and the appearance was clearly felt by fluorescence. Fluorescence persisted after exposure.

[比較例1]
蛍光染料を添加せず、光拡散剤として硫酸バリウム2質量部を添加した試験片を作製し、各評価を行った。その結果を表1に示す。相関色温度は光源の色温度より若干低い6500Kであったが、蛍光はなく見た目の鮮明さは感じられなかった。
[Comparative Example 1]
A test piece to which 2 parts by mass of barium sulfate was added as a light diffusing agent without adding a fluorescent dye was prepared and evaluated. The results are shown in Table 1. The correlated color temperature was 6500 K, which is slightly lower than the color temperature of the light source, but there was no fluorescence and the clearness of the appearance was not felt.

[比較例2]
蛍光を発しない染料としてダイヤレジンレッドHS(ペリノン系:三菱化学(株)製)0.003質量部を用いた以外は実施例1と同様に試験片を作製し、各評価を行った。その結果を表1に示す。初期の色温度は4400Kで自然な色となったが、蛍光はなく、やや暗く感じられた。
[Comparative Example 2]
A test piece was prepared and evaluated in the same manner as in Example 1 except that 0.003 part by mass of Diamond Resin Red HS (Perinone: manufactured by Mitsubishi Chemical Corporation) was used as a dye that does not emit fluorescence. The results are shown in Table 1. The initial color temperature was 4400K and the color became natural, but there was no fluorescence and it was felt slightly dark.

[比較例3]
蛍光染料としてスミプラストレッドHF4G(アントラピリドン系:住化ファインケム(株)製)0.003質量部を用いた以外は実施例1と同様に試験片を作製し、各評価を行った。その結果を表1に示す。初期の色温度は4800Kで、自然な色となり、蛍光により鮮明に感じられたが、暴露後はその蛍光は消失した。
[Comparative Example 3]
A test piece was prepared in the same manner as in Example 1 except that 0.003 part by mass of Sumiplast Tread HF4G (Anthrapyridone: Sumika Finechem Co., Ltd.) was used as a fluorescent dye, and each evaluation was performed. The results are shown in Table 1. The initial color temperature was 4800K, and it became a natural color and felt vivid by fluorescence, but the fluorescence disappeared after exposure.

[比較例4]
光拡散剤として硫酸バリウム 2質量部、蛍光染料の一種である蛍光増白剤として、ホワイトフローHCS(オキサゾリン系:住化カラー(株)製)0.0005質量部を用いた以外は実施例1と同様にして試験片を作製し、各評価を行った。その結果を表1に示す。相関色温度は6700Kで、比較例1と比べると、蛍光により青みのある白色となったが、暴露後はその蛍光が消失した。
[Comparative Example 4]
Example 1 except that 2 parts by weight of barium sulfate as a light diffusing agent and 0.0005 parts by weight of Whiteflow HCS (Oxazoline series: manufactured by Sumika Color Co., Ltd.) were used as a fluorescent whitening agent which is a kind of fluorescent dye. Test pieces were prepared in the same manner as described above and evaluated. The results are shown in Table 1. The correlated color temperature was 6700 K, and when compared with Comparative Example 1, it became white with a bluish color due to fluorescence, but the fluorescence disappeared after exposure.

Figure 2005267971
Figure 2005267971

以上説明したように、本発明のメタクリル系樹脂組成物からなる成形品は、種々の色温度を有しており見た目が鮮明で意匠性に優れ、また、耐候性にも優れている。したがって、本発明のメタクリル系樹脂組成物は、屋内、屋外の家庭用、施設用等様々な照明器具用カバーの成形材料として好適に利用できる。
As described above, the molded article made of the methacrylic resin composition of the present invention has various color temperatures, has a clear appearance, is excellent in design, and is excellent in weather resistance. Therefore, the methacrylic resin composition of the present invention can be suitably used as a molding material for various lighting equipment covers such as indoor and outdoor households and facilities.

Claims (2)

メタクリル系樹脂100質量部に対して、光拡散剤を0.1〜10質量部及びペリレン系蛍光染料を0.0001〜0.005質量部含有する照明カバー用メタクリル系樹脂組成物。   A methacrylic resin composition for an illumination cover containing 0.1 to 10 parts by mass of a light diffusing agent and 0.0001 to 0.005 parts by mass of a perylene fluorescent dye with respect to 100 parts by mass of the methacrylic resin. 上記メタクリル系樹脂組成物を成形してなる照明カバー。
A lighting cover formed by molding the methacrylic resin composition.
JP2004076778A 2004-03-17 2004-03-17 Methacrylate resin composition for cover of lighting device, and cover of lighting device Pending JP2005267971A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2893945A1 (en) * 2005-11-29 2007-06-01 Extrusion Du Polyethylene A Ba Material comprising a polymeric matrix, useful in greenhouse cover/wall, comprises homogeneously distributed fluorescent mineral additive and mineral filler of scattering character i.e. containing e.g. calcium carbonate, kaolins and talcs
JP2007194089A (en) * 2006-01-19 2007-08-02 Inax Corp Globe for lighting fixture
US8040026B2 (en) 2008-07-08 2011-10-18 Candle Laboratory Co., Ltd Illumination lamp with inner light tube
JP2011209658A (en) * 2010-03-30 2011-10-20 Fujifilm Corp Light-diffusing film for led lamp
JP7503544B2 (en) 2018-10-26 2024-06-20 トリンゼオ ヨーロッパ ゲゼルシャフト ミット ベシュレンクテル ハフツング Polymer composition suitable for injection molding containing particles and colorants, method for preparing same and use thereof - Patents.com
JP7503545B2 (en) 2018-10-26 2024-06-20 トリンゼオ ヨーロッパ ゲゼルシャフト ミット ベシュレンクテル ハフツング Polymeric composition containing particles and colorants, method for preparing same and use thereof - Patents.com

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2893945A1 (en) * 2005-11-29 2007-06-01 Extrusion Du Polyethylene A Ba Material comprising a polymeric matrix, useful in greenhouse cover/wall, comprises homogeneously distributed fluorescent mineral additive and mineral filler of scattering character i.e. containing e.g. calcium carbonate, kaolins and talcs
WO2007063240A1 (en) * 2005-11-29 2007-06-07 Societe D'extrusion Du Polyethylene A. Barbier & Cie Fluorescent covering films for greenhouses
JP2007194089A (en) * 2006-01-19 2007-08-02 Inax Corp Globe for lighting fixture
JP4643457B2 (en) * 2006-01-19 2011-03-02 株式会社Inax Globe for lighting equipment
US8040026B2 (en) 2008-07-08 2011-10-18 Candle Laboratory Co., Ltd Illumination lamp with inner light tube
JP2011209658A (en) * 2010-03-30 2011-10-20 Fujifilm Corp Light-diffusing film for led lamp
JP7503544B2 (en) 2018-10-26 2024-06-20 トリンゼオ ヨーロッパ ゲゼルシャフト ミット ベシュレンクテル ハフツング Polymer composition suitable for injection molding containing particles and colorants, method for preparing same and use thereof - Patents.com
JP7503545B2 (en) 2018-10-26 2024-06-20 トリンゼオ ヨーロッパ ゲゼルシャフト ミット ベシュレンクテル ハフツング Polymeric composition containing particles and colorants, method for preparing same and use thereof - Patents.com

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