JP2017002180A - White resin composition - Google Patents

White resin composition Download PDF

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JP2017002180A
JP2017002180A JP2015117302A JP2015117302A JP2017002180A JP 2017002180 A JP2017002180 A JP 2017002180A JP 2015117302 A JP2015117302 A JP 2015117302A JP 2015117302 A JP2015117302 A JP 2015117302A JP 2017002180 A JP2017002180 A JP 2017002180A
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calcium carbonate
resin composition
mass
treated
silicone oil
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JP6248065B2 (en
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江口 健一郎
Kenichiro Eguchi
健一郎 江口
裕 南野
Yutaka Minamino
裕 南野
松井 政裕
Masahiro Matsui
政裕 松井
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Shiraishi Kogyo Kaisha Ltd
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Shiraishi Kogyo Kaisha Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a white resin composition capable of retaining high whiteness even after a heat resistance test.SOLUTION: There is provided a white resin composition, containing: a white pigment; a surface-treated calcium carbonate obtained by surface-treating the surface of synthesized calcium carbonate having the average grain size of 0.05 to 1 μm with organic modified silicone oil; and a resin, in which the containing ratio between the white pigment and the surface-treated calcium carbonate lies in the range of 90:10 to 60:40 by mass ratio (white pigment:surface-treated calcium carbonate), and the total content of the white pigment and the surface-treated calcium carbonate in the resin composition lies in the range of 5 to 70 mass%.SELECTED DRAWING: None

Description

本発明は、白色顔料と表面処理炭酸カルシウムを含む白色樹脂組成物に関するものである。   The present invention relates to a white resin composition containing a white pigment and surface-treated calcium carbonate.

白色顔料と表面処理炭酸カルシウムを含む白色樹脂組成物としては、白色顔料とシリカ処理炭酸カルシウムとを併用した白色樹脂組成物が、特許文献1に開示されている。   As a white resin composition containing a white pigment and surface-treated calcium carbonate, Patent Document 1 discloses a white resin composition in which a white pigment and silica-treated calcium carbonate are used in combination.

特開2014−58427号公報JP 2014-58427 A

特許文献1に開示されているように、白色顔料とシリカ処理炭酸カルシウムとを併用することにより、高い白色度を樹脂に付与することができる。近年は、さらに耐熱性試験後においても、高い白色度を保持することができる白色樹脂組成物が求められている。   As disclosed in Patent Document 1, high whiteness can be imparted to the resin by using a white pigment and silica-treated calcium carbonate in combination. In recent years, a white resin composition capable of maintaining high whiteness even after a heat resistance test has been demanded.

本発明の目的は、耐熱性試験後においても、高い白色度を保持することができる白色樹脂組成物を提供することにある。   An object of the present invention is to provide a white resin composition capable of maintaining high whiteness even after a heat resistance test.

本発明の白色樹脂組成物は、白色顔料と、平均粒子径0.05〜1μmの合成炭酸カルシウムの表面を縮合リン酸及び有機変性シリコーンオイルで表面処理した表面処理炭酸カルシウムと、樹脂とを含む白色樹脂組成物であって、前記白色顔料と前記表面処理炭酸カルシウムの含有比率が、質量比(白色顔料:表面処理炭酸カルシウム)で、90:10〜60:40の範囲内であり、樹脂組成物中の前記白色顔料及び前記表面処理炭酸カルシウムの合計の含有量が、5〜70質量%の範囲内であることを特徴としている。   The white resin composition of the present invention includes a white pigment, a surface-treated calcium carbonate obtained by surface-treating the surface of synthetic calcium carbonate having an average particle diameter of 0.05 to 1 μm with condensed phosphoric acid and organically modified silicone oil, and a resin. It is a white resin composition, Comprising: The content ratio of the said white pigment and the said surface treatment calcium carbonate is in the range of 90: 10-60: 40 by mass ratio (white pigment: surface treatment calcium carbonate), Resin composition The total content of the white pigment and the surface-treated calcium carbonate in the product is in the range of 5 to 70% by mass.

表面処理炭酸カルシウム中のリン含有量は、0.2〜2質量%の範囲内となるように、縮合リン酸で炭酸カルシウムが表面処理されていることが好ましい。   It is preferable that the calcium carbonate is surface-treated with condensed phosphoric acid so that the phosphorus content in the surface-treated calcium carbonate is in the range of 0.2 to 2% by mass.

表面処理炭酸カルシウムにおける有機変性シリコーンオイルの処理量は、炭酸カルシウム100質量部に対して、0.1〜10質量部の範囲内であることが好ましい。   The treatment amount of the organically modified silicone oil in the surface-treated calcium carbonate is preferably in the range of 0.1 to 10 parts by mass with respect to 100 parts by mass of calcium carbonate.

有機変性シリコーンオイルとしては、エポキシ変性シリコーンオイルが挙げられる。   Examples of the organically modified silicone oil include epoxy modified silicone oil.

白色顔料としては、酸化チタンを用いることが好ましい。   As the white pigment, it is preferable to use titanium oxide.

本発明によれば、耐熱性試験後においても、高い白色度を保持することができる白色樹脂組成物を提供することができる。   According to the present invention, it is possible to provide a white resin composition that can maintain high whiteness even after a heat resistance test.

以下、本発明について、さらに詳細に説明する。   Hereinafter, the present invention will be described in more detail.

<表面処理炭酸カルシウム>
本発明において用いる表面処理炭酸カルシウムは、平均粒子径0.05〜1μmの合成炭酸カルシウムの表面を縮合リン酸及び有機変性シリコーンオイルで表面処理した表面処理炭酸カルシウムである。処理ベースの炭酸カルシウムの平均粒子径は、0.05〜1μmの範囲内であり、さらに好ましくは0.08〜0.5μmの範囲内であり、さらに好ましくは0.1〜0.3μmの範囲内である。平均粒子径がこのような範囲からはずれると、白色顔料との併用による高い白色度を保持できない場合がある。表面処理炭酸カルシウムの平均粒子径も、上記の処理ベースの炭酸カルシウムの平均粒子径と同様の範囲内であることが好ましい。
<Surface treatment calcium carbonate>
The surface-treated calcium carbonate used in the present invention is a surface-treated calcium carbonate obtained by surface-treating the surface of synthetic calcium carbonate having an average particle size of 0.05 to 1 μm with condensed phosphoric acid and organically modified silicone oil. The average particle size of the treatment-based calcium carbonate is in the range of 0.05 to 1 μm, more preferably in the range of 0.08 to 0.5 μm, and still more preferably in the range of 0.1 to 0.3 μm. Is within. If the average particle diameter is out of such a range, high whiteness may not be maintained when used in combination with a white pigment. The average particle diameter of the surface-treated calcium carbonate is also preferably in the same range as the average particle diameter of the above-mentioned treated base calcium carbonate.

本発明において平均粒子径は、電子顕微鏡写真による画像解析により測定することができる。   In the present invention, the average particle diameter can be measured by image analysis using an electron micrograph.

合成炭酸カルシウムは、例えば水酸化カルシウムを炭酸ガスと反応させることによって製造することができる。水酸化カルシウムは、例えば酸化カルシウムを水と反応させることによって製造することができる。酸化カルシウムは、例えば石灰石原石をコークスなどと混合し焼成することによって製造することができる。この場合、焼成時に炭酸ガスが発生するので、この炭酸ガスを水酸化カルシウムの水懸濁液中に吹き込み、炭酸ガスを水酸化カルシウムと反応させることによって炭酸カルシウムを製造することができる。   Synthetic calcium carbonate can be produced, for example, by reacting calcium hydroxide with carbon dioxide. Calcium hydroxide can be produced, for example, by reacting calcium oxide with water. Calcium oxide can be produced, for example, by mixing limestone ore with coke and firing. In this case, since carbon dioxide gas is generated during firing, calcium carbonate can be produced by blowing this carbon dioxide gas into an aqueous suspension of calcium hydroxide and reacting the carbon dioxide gas with calcium hydroxide.

合成炭酸カルシウムは、カルサイト結晶を有することが好ましい。また、合成炭酸カルシウムは、略立方体の形状を有していることが好ましい。   The synthetic calcium carbonate preferably has calcite crystals. Moreover, it is preferable that the synthetic calcium carbonate has a substantially cubic shape.

(縮合リン酸による表面処理)
縮合リン酸としては、ピロリン酸、メタリン酸などの縮合リン酸を用いることができる。
(Surface treatment with condensed phosphoric acid)
As the condensed phosphoric acid, condensed phosphoric acid such as pyrophosphoric acid and metaphosphoric acid can be used.

炭酸カルシウムを縮合リン酸で表面処理する方法としては、湿式処理及び乾式処理が挙げられる。   Examples of the method for surface treatment of calcium carbonate with condensed phosphoric acid include wet treatment and dry treatment.

湿式処理は、炭酸カルシウムの水懸濁液に、縮合リン酸を添加し混合した後、炭酸カルシウムを濾過し、乾燥する方法である。この方法では、縮合リン酸のナトリウム塩やカリウム塩などのアルカリ金属塩等を用いてもよい。しかしながら、表面処理炭酸カルシウムに含有させるナトリウムまたはカリウムなどのアルカリ金属の含有量を低減する観点からは、塩の形態ではなく、酸の形態で用いることが好ましい。   The wet treatment is a method in which condensed phosphoric acid is added to and mixed with an aqueous suspension of calcium carbonate, and then the calcium carbonate is filtered and dried. In this method, alkali metal salts such as sodium salt and potassium salt of condensed phosphoric acid may be used. However, from the viewpoint of reducing the content of an alkali metal such as sodium or potassium contained in the surface-treated calcium carbonate, it is preferably used in the form of an acid instead of a salt.

乾式処理は、炭酸カルシウムの粉末に、縮合リン酸を添加し混合した後、乾燥する方法である。縮合リン酸は、溶液の形態で添加することができる。   The dry treatment is a method in which condensed phosphoric acid is added to and mixed with calcium carbonate powder and then dried. The condensed phosphoric acid can be added in the form of a solution.

縮合リン酸の処理量は、表面処理炭酸カルシウム中のリン含有量が、0.2〜2質量%の範囲内となるような処理量であることが好ましい。表面処理炭酸カルシウム中のリン含有量は、0.4〜1.8質量%の範囲内であることがさらに好ましく、0.6〜1.6質量%の範囲内であることが特に好ましい。縮合リン酸の処理量が少なすぎると、表面処理されていない炭酸カルシウム表面が存在し、そこが起点となって樹脂が劣化着色するため、樹脂の白色度を高く保持できない場合がある。また、縮合リン酸の処理量が多くなりすぎると、炭酸カルシウム表面と反応してない遊離した縮合リン酸が樹脂と反応し樹脂が着色するため、樹脂の白色度を高く保持できない場合がある。   The treatment amount of the condensed phosphoric acid is preferably such a treatment amount that the phosphorus content in the surface-treated calcium carbonate falls within the range of 0.2 to 2% by mass. The phosphorus content in the surface-treated calcium carbonate is more preferably in the range of 0.4 to 1.8% by mass, and particularly preferably in the range of 0.6 to 1.6% by mass. If the treatment amount of the condensed phosphoric acid is too small, there is a surface of calcium carbonate that is not surface-treated, and the resin is deteriorated and colored from there, so that the whiteness of the resin may not be kept high. Further, if the amount of the condensed phosphoric acid is excessively increased, the free condensed phosphoric acid that has not reacted with the calcium carbonate surface reacts with the resin and the resin is colored, so that the whiteness of the resin may not be maintained high.

表面処理炭酸カルシウム中のリン含有量は、例えば、ICP発光分光分析法で測定することができる。   The phosphorus content in the surface-treated calcium carbonate can be measured by, for example, ICP emission spectroscopy.

(有機変性シリコーンオイルによる表面処理)
有機変性シリコーンオイルとしては、エポキシ変性シリコーンオイル、アミノ変性シリコーンオイル、アミン変性シリコーンオイル、メルカプト変性シリコーンオイル、カルボキシル変性シリコーンオイル、ポリエーテル変性シリコーンオイル、フロロアルキル変性シリコーンオイル、長鎖アルキル変性シリコーンオイル、フェニル変性シリコーンオイル、高級脂肪酸エステル変性シリコーンオイル、高級脂肪酸アミド変性シリコーンオイル、アクリル変性シリコーンオイル、メタクリル変性シリコーンオイル、カルボン酸無水物変性シリコーンオイル、カルビノール変性シリコーンオイル、ジオール変性シリコーンオイルなどが挙げられる。これらの中でも、特にエポキシ変性シリコーンオイルが好ましく用いられる。エポキシ変性シリコーンオイルとしては、両末端型エポキシ変性シリコーンオイル、片末端型エポキシ変性シリコーンオイル、側鎖型エポキシ変性シリコーンオイル、側鎖両末端型エポキシ変性シリコーンオイルなどがある。
(Surface treatment with organically modified silicone oil)
Examples of the organically modified silicone oil include epoxy modified silicone oil, amino modified silicone oil, amine modified silicone oil, mercapto modified silicone oil, carboxyl modified silicone oil, polyether modified silicone oil, fluoroalkyl modified silicone oil, and long chain alkyl modified silicone oil. , Phenyl-modified silicone oil, higher fatty acid ester-modified silicone oil, higher fatty acid amide-modified silicone oil, acrylic-modified silicone oil, methacryl-modified silicone oil, carboxylic acid anhydride-modified silicone oil, carbinol-modified silicone oil, diol-modified silicone oil, etc. Can be mentioned. Among these, epoxy-modified silicone oil is particularly preferably used. Examples of the epoxy-modified silicone oil include a double-ended epoxy-modified silicone oil, a single-ended epoxy-modified silicone oil, a side-chain epoxy-modified silicone oil, and a side-chain double-ended epoxy-modified silicone oil.

有機変性シリコーンオイルを表面処理する方法としては、炭酸カルシウム粉末に有機変性シリコーンオイルを添加し混合した後、加熱乾燥する乾式処理方法が好ましく用いられる。有機変性シリコーンオイルは、必要に応じて、溶媒に溶解した溶液の状態で添加することが好ましい。   As a method for surface-treating the organically modified silicone oil, a dry treatment method in which the organically modified silicone oil is added to and mixed with calcium carbonate powder and then dried by heating is preferably used. The organically modified silicone oil is preferably added in the form of a solution dissolved in a solvent, if necessary.

縮合リン酸で処理した後、有機変性シリコーンオイルで処理する場合には、縮合リン酸で処理した後の表面処理炭酸カルシウムの粉末に、有機変性シリコーンオイルを添加して処理する。   In the case of treating with an organically modified silicone oil after treating with condensed phosphoric acid, an organically modified silicone oil is added to the surface treated calcium carbonate powder after treating with condensed phosphoric acid.

有機変性シリコーンオイルの処理量は、炭酸カルシウム100質量部に対し、0.1〜10質量部であることが好ましく、さらに好ましくは0.2〜5質量部であり、さらに好ましくは0.5〜3質量部である。有機変性シリコーンオイルの処理量が少なすぎると、樹脂の白色度を高く保持できない場合がある。また、有機変性シリコーンオイルの処理量が多くなりすぎると、樹脂の表面に有機変性シリコーンオイルがブリードアウトし、樹脂の表面を汚染する場合がある。   The treatment amount of the organically modified silicone oil is preferably 0.1 to 10 parts by mass, more preferably 0.2 to 5 parts by mass, and still more preferably 0.5 to 100 parts by mass with respect to 100 parts by mass of calcium carbonate. 3 parts by mass. If the amount of the organically modified silicone oil is too small, the whiteness of the resin may not be kept high. If the amount of the organically modified silicone oil is too large, the organically modified silicone oil may bleed out on the resin surface and contaminate the resin surface.

縮合リン酸による表面処理及び有機変性シリコーンオイルによる表面処理の順序としては、縮合リン酸で処理した後、有機変性シリコーンオイルで処理することが好ましい。しかしながら、縮合リン酸と有機変性シリコーンオイルとを同時に表面処理してもよく、有機変性シリコーンオイルで表面処理した後、縮合リン酸で表面処理してもよい。   The order of the surface treatment with condensed phosphoric acid and the surface treatment with organic modified silicone oil is preferably treated with condensed phosphoric acid and then with organic modified silicone oil. However, the condensed phosphoric acid and the organically modified silicone oil may be surface-treated at the same time, or after the surface treatment with the organically modified silicone oil, the surface treatment may be performed with the condensed phosphoric acid.

<白色顔料>
白色顔料としては、酸化チタン、酸化亜鉛、硫化亜鉛などが挙げられる。これらの中でも酸化チタンを用いることが特に好ましい。
<White pigment>
Examples of white pigments include titanium oxide, zinc oxide, and zinc sulfide. Among these, it is particularly preferable to use titanium oxide.

<樹脂>
本発明において用いる樹脂は、熱可塑性樹脂及び熱硬化性樹脂のいずれでもよい。
<Resin>
The resin used in the present invention may be either a thermoplastic resin or a thermosetting resin.

熱可塑性樹脂としては、ポリアミド、ポリアセタール、ポリフェニレンサルファイド、ポリカーボネート、ポリブチレンテレフタレート、ポリエチレンテレフタレート、変性ポリフェニレンエーテル、ポリシクロヘキサンジメチレンテレフタレート、液晶ポリエステル、ポリエーテルイミドなどが挙げられる。また、熱可塑性樹脂は、複数のポリマーを混合したポリマーアロイであってもよい。熱硬化性樹脂としては、エポキシ樹脂、フェノール樹脂、不飽和ポリエステル樹脂、アミノ樹脂、ユリア樹脂、シリコーン樹脂などが挙げられる。   Examples of the thermoplastic resin include polyamide, polyacetal, polyphenylene sulfide, polycarbonate, polybutylene terephthalate, polyethylene terephthalate, modified polyphenylene ether, polycyclohexanedimethylene terephthalate, liquid crystal polyester, and polyetherimide. The thermoplastic resin may be a polymer alloy in which a plurality of polymers are mixed. Examples of the thermosetting resin include epoxy resins, phenol resins, unsaturated polyester resins, amino resins, urea resins, and silicone resins.

(配合割合)
白色顔料と表面処理炭酸カルシウムの含有比率は、質量比(白色顔料:表面処理炭酸カルシウム)で、90:10〜60:40の範囲内であり、好ましくは、80:20〜70:30の範囲内である。表面処理炭酸カルシウムの含有比率が少なすぎると、耐熱性試験後において、高い白色度を保持することができるという効果が十分に得られない場合がある。また、表面処理炭酸カルシウムの含有比率が多過ぎても、高い白色度を保持することができるという効果が十分に得られない場合がある。
(Mixing ratio)
The content ratio of the white pigment and the surface-treated calcium carbonate is a mass ratio (white pigment: surface-treated calcium carbonate) and is in the range of 90:10 to 60:40, preferably in the range of 80:20 to 70:30. Is within. If the content ratio of the surface-treated calcium carbonate is too small, the effect of being able to maintain high whiteness after the heat resistance test may not be sufficiently obtained. Moreover, even if there is too much content rate of surface treatment calcium carbonate, the effect that high whiteness can be maintained may not fully be acquired.

樹脂組成物中の白色顔料及び表面処理炭酸カルシウムの合計の含有量は、5〜70質量%の範囲内であり、好ましくは、10〜70質量%の範囲内であり、さらに好ましくは20〜70質量%の範囲内である。白色顔料及び表面処理炭酸カルシウムの合計の含有量が少なすぎると、樹脂に高い白色度を十分に与えることができない場合がある。また、白色顔料及び表面処理炭酸カルシウムの合計の含有量が多過ぎると、樹脂組成物の機械的強度が低下したり、また白色顔料及び表面処理炭酸カルシウムを樹脂に配合することが困難になり、樹脂組成物の成形性が悪くなる場合がある。   The total content of the white pigment and the surface-treated calcium carbonate in the resin composition is in the range of 5 to 70% by mass, preferably in the range of 10 to 70% by mass, and more preferably 20 to 70%. It is in the range of mass%. If the total content of the white pigment and the surface-treated calcium carbonate is too small, the resin may not be sufficiently provided with high whiteness. Further, if the total content of the white pigment and the surface-treated calcium carbonate is too much, the mechanical strength of the resin composition is lowered, or it becomes difficult to blend the white pigment and the surface-treated calcium carbonate into the resin, The moldability of the resin composition may deteriorate.

(白色樹脂組成物の製造)
本発明の白色樹脂組成物は、白色顔料と表面処理炭酸カルシウムとを、樹脂中に混合し、白色顔料及び表面処理炭酸カルシウムを、樹脂中に分散させることにより製造することができる。白色樹脂組成物の製造方法は、使用する樹脂に応じて適宜公知の方法により製造することができる。
(Manufacture of white resin composition)
The white resin composition of the present invention can be produced by mixing a white pigment and surface-treated calcium carbonate in a resin and dispersing the white pigment and surface-treated calcium carbonate in the resin. The manufacturing method of a white resin composition can be suitably manufactured by a well-known method according to resin to be used.

樹脂として熱可塑性樹脂を用いる場合、熱可塑性樹脂を加熱溶融した状態で、白色顔料及び表面処理炭酸カルシウムを添加し、例えば、二軸押出混練機やニーダ―等を用いて樹脂中に白色顔料及び表面処理炭酸カルシウムを含有させることができる。   When a thermoplastic resin is used as the resin, a white pigment and surface-treated calcium carbonate are added in a state where the thermoplastic resin is heated and melted. For example, a white pigment and a surface treatment calcium carbonate are added to the resin using a twin screw extrusion kneader or a kneader. Surface treated calcium carbonate can be included.

また、樹脂に白色顔料及び表面処理炭酸カルシウムを高濃度に含有させたマスターバッチを作製し、このマスターバッチに樹脂を添加することによって、白色樹脂組成物を製造してもよい。さらに、本発明の白色樹脂組成物を使用した成形品は、使用する樹脂に応じて適宜公知の方法により製造することができる。例えば、射出成形や押出成形、インフレーション成形、中空成形、圧縮成形、トランスファー成形等を用いることができる。   Moreover, you may manufacture a white resin composition by producing the masterbatch which made the resin contain the white pigment and the surface treatment calcium carbonate in high concentration, and adding resin to this masterbatch. Furthermore, a molded article using the white resin composition of the present invention can be appropriately produced by a known method depending on the resin used. For example, injection molding, extrusion molding, inflation molding, hollow molding, compression molding, transfer molding, and the like can be used.

以下、本発明に従う具体的な実施例を説明するが、本発明はこれらの実施例に限定されるものではない。   Specific examples according to the present invention will be described below, but the present invention is not limited to these examples.

[表面処理炭酸カルシウムの調製]
(調製例1)
平均粒子径0.15μm(電子顕微鏡写真による画像解析による測定)である合成炭酸カルシウムを、処理ベースの炭酸カルシウムとして用いた。なお、この合成炭酸カルシウムの形状は、略立方体の形状であり、結晶形態はカルサイト結晶である。
[Preparation of surface-treated calcium carbonate]
(Preparation Example 1)
Synthetic calcium carbonate having an average particle size of 0.15 μm (measured by image analysis using an electron micrograph) was used as the treatment-based calcium carbonate. In addition, the shape of this synthetic calcium carbonate is a substantially cubic shape, and the crystal form is a calcite crystal.

この合成炭酸カルシウムの10質量%の水懸濁液(スラリー)を調製し、この炭酸カルシウム水懸濁液に、ピロリン酸が5質量部となるように、ピロリン酸の10質量%希釈水溶液を添加し、10分間撹拌混合した。その後、脱水・乾燥・粉砕して、ピロリン酸を処理した縮合リン酸処理炭酸カルシウムを得た。   A 10 mass% aqueous suspension (slurry) of this synthetic calcium carbonate was prepared, and a 10 mass% diluted aqueous solution of pyrophosphoric acid was added to this calcium carbonate aqueous suspension so that 5 parts by mass of pyrophosphoric acid was obtained. And stirred and mixed for 10 minutes. Thereafter, dehydration, drying, and pulverization were performed to obtain pyrophosphate-treated calcium carbonate treated with pyrophosphate.

得られた縮合リン酸処理炭酸カルシウムを攪拌混合器に入れ、縮合リン酸処理炭酸カルシウム中の炭酸カルシウム100質量部に対して、2質量部となるように両末端エポキシ変性シリコーンオイルを添加し、80℃で10分間撹拌混合して、縮合リン酸及び有機変性シリコーンオイルで表面処理した表面処理炭酸カルシウムを得た。   Put the obtained condensed phosphoric acid-treated calcium carbonate in a stirring mixer, add both ends epoxy-modified silicone oil to 2 parts by mass with respect to 100 parts by mass of calcium carbonate in the condensed phosphoric acid-treated calcium carbonate, The mixture was stirred and mixed at 80 ° C. for 10 minutes to obtain surface-treated calcium carbonate surface-treated with condensed phosphoric acid and organically modified silicone oil.

得られた表面処理炭酸カルシウムのリン含有量を、ICP発光分光分析法で測定したところ、0.9質量%であった。   It was 0.9 mass% when the phosphorus content of the obtained surface treatment calcium carbonate was measured by the ICP emission spectral analysis method.

(調製例2)
平均粒子径0.05μmの合成炭酸カルシウムを、処理ベースの炭酸カルシウムとして用いる以外は、調製例1と同様にして表面処理炭酸カルシウムを得た。得られた表面処理炭酸カルシウムのリン含有量を、ICP発光分光分析法で測定したところ、0.9質量%であった。
(Preparation Example 2)
Surface-treated calcium carbonate was obtained in the same manner as in Preparation Example 1 except that synthetic calcium carbonate having an average particle size of 0.05 μm was used as the treatment-based calcium carbonate. It was 0.9 mass% when the phosphorus content of the obtained surface treatment calcium carbonate was measured by the ICP emission spectral analysis method.

(調製例3)
平均粒子径0.1μmの合成炭酸カルシウムを、処理ベースの炭酸カルシウムとして用いる以外は、調製例1と同様にして表面処理炭酸カルシウムを得た。得られた表面処理炭酸カルシウムのリン含有量を、ICP発光分光分析法で測定したところ、0.9質量%であった。
(Preparation Example 3)
Surface-treated calcium carbonate was obtained in the same manner as in Preparation Example 1 except that synthetic calcium carbonate having an average particle size of 0.1 μm was used as the treatment-based calcium carbonate. It was 0.9 mass% when the phosphorus content of the obtained surface treatment calcium carbonate was measured by the ICP emission spectral analysis method.

(調製例4)
平均粒子径0.3μmの合成炭酸カルシウムを、処理ベースの炭酸カルシウムとして用いる以外は、調製例1と同様にして表面処理炭酸カルシウムを得た。得られた表面処理炭酸カルシウムのリン含有量を、ICP発光分光分析法で測定したところ、0.9質量%であった。
(Preparation Example 4)
Surface-treated calcium carbonate was obtained in the same manner as in Preparation Example 1 except that synthetic calcium carbonate having an average particle size of 0.3 μm was used as the treatment-based calcium carbonate. It was 0.9 mass% when the phosphorus content of the obtained surface treatment calcium carbonate was measured by the ICP emission spectral analysis method.

(調製例5)
平均粒子径0.5μmの合成炭酸カルシウムを、処理ベースの炭酸カルシウムとして用いる以外は、調製例1と同様にして表面処理炭酸カルシウムを得た。得られた表面処理炭酸カルシウムのリン含有量を、ICP発光分光分析法で測定したところ、0.9質量%であった。
(Preparation Example 5)
Surface-treated calcium carbonate was obtained in the same manner as in Preparation Example 1 except that synthetic calcium carbonate having an average particle size of 0.5 μm was used as the treatment-based calcium carbonate. It was 0.9 mass% when the phosphorus content of the obtained surface treatment calcium carbonate was measured by the ICP emission spectral analysis method.

(調製例6)
平均粒子径1μmの合成炭酸カルシウムを、処理ベースの炭酸カルシウムとして用いる以外は、調製例1と同様にして表面処理炭酸カルシウムを得た。得られた表面処理炭酸カルシウムのリン含有量を、ICP発光分光分析法で測定したところ、0.9質量%であった。
(Preparation Example 6)
Surface-treated calcium carbonate was obtained in the same manner as in Preparation Example 1 except that synthetic calcium carbonate having an average particle diameter of 1 μm was used as the treatment-based calcium carbonate. It was 0.9 mass% when the phosphorus content of the obtained surface treatment calcium carbonate was measured by the ICP emission spectral analysis method.

(調製例7)
有機変性シリコーンオイルの処理量を0.5質量部とする以外は、調製例1と同様にして表面処理炭酸カルシウムを得た。
(Preparation Example 7)
A surface-treated calcium carbonate was obtained in the same manner as in Preparation Example 1 except that the treatment amount of the organically modified silicone oil was 0.5 parts by mass.

(調製例8)
有機変性シリコーンオイルの処理量を5質量部とする以外は、調製例1と同様にして表面処理炭酸カルシウムを得た。
(Preparation Example 8)
A surface-treated calcium carbonate was obtained in the same manner as in Preparation Example 1 except that the treatment amount of the organically modified silicone oil was 5 parts by mass.

(調製例9)
ピロリン酸の添加量を1.5質量部とする以外は、調製例1と同様にして表面処理炭酸カルシウムを得た。得られた表面処理炭酸カルシウムのリン含有量を、ICP発光分光分析法で測定したところ、0.3質量%であった。
(Preparation Example 9)
A surface-treated calcium carbonate was obtained in the same manner as in Preparation Example 1 except that the amount of pyrophosphoric acid added was 1.5 parts by mass. It was 0.3 mass% when the phosphorus content of the obtained surface treatment calcium carbonate was measured by the ICP emission spectral analysis method.

(調製例10)
ピロリン酸の添加量を10質量部とする以外は、調製例1と同様にして表面処理炭酸カルシウムを得た。得られた表面処理炭酸カルシウムのリン含有量を、ICP発光分光分析法で測定したところ、1.9質量%であった。
(Preparation Example 10)
Surface-treated calcium carbonate was obtained in the same manner as in Preparation Example 1, except that the amount of pyrophosphoric acid added was 10 parts by mass. It was 1.9 mass% when the phosphorus content of the obtained surface treatment calcium carbonate was measured by the ICP emission spectral analysis method.

(調製例11)
縮合リン酸として、ピロリン酸に代えて、メタリン酸を用いる以外は、調製例1と同様にして表面処理炭酸カルシウムを得た。
(Preparation Example 11)
A surface-treated calcium carbonate was obtained in the same manner as in Preparation Example 1 except that metaphosphoric acid was used in place of pyrophosphoric acid as the condensed phosphoric acid.

(調製例12)
両末端エポキシ変性シリコーンオイルに代えて、片末端エポキシ変性シリコーンオイルを用いる以外は、調製例1と同様にして表面処理炭酸カルシウムを得た。
(Preparation Example 12)
A surface-treated calcium carbonate was obtained in the same manner as in Preparation Example 1, except that one-end epoxy-modified silicone oil was used instead of the both-end epoxy-modified silicone oil.

(比較調製例1)
平均粒子径0.03μmの合成炭酸カルシウムを、処理ベースの炭酸カルシウムとして用いる以外は、調製例1と同様にして表面処理炭酸カルシウムを得た。得られた表面処理炭酸カルシウムのリン含有量を、ICP発光分光分析法で測定したところ、0.9質量%であった。
(Comparative Preparation Example 1)
Surface-treated calcium carbonate was obtained in the same manner as in Preparation Example 1, except that synthetic calcium carbonate having an average particle size of 0.03 μm was used as the treatment-based calcium carbonate. It was 0.9 mass% when the phosphorus content of the obtained surface treatment calcium carbonate was measured by the ICP emission spectral analysis method.

(比較調製例2)
平均粒子径2μmの合成炭酸カルシウムを、処理ベースの炭酸カルシウムとして用いる以外は、調製例1と同様にして表面処理炭酸カルシウムを得た。得られた表面処理炭酸カルシウムのリン含有量を、ICP発光分光分析法で測定したところ、0.9質量%であった。
(Comparative Preparation Example 2)
Surface-treated calcium carbonate was obtained in the same manner as in Preparation Example 1 except that synthetic calcium carbonate having an average particle diameter of 2 μm was used as the treatment-based calcium carbonate. It was 0.9 mass% when the phosphorus content of the obtained surface treatment calcium carbonate was measured by the ICP emission spectral analysis method.

(比較調製例3)
平均粒子径2μmである重質炭酸カルシウムを、処理ベースの炭酸カルシウムとして用いる以外は、調製例1と同様にして表面処理炭酸カルシウムを得た。得られた表面処理炭酸カルシウムのリン含有量を、ICP発光分光分析法で測定したところ、0.9質量%であった。
(Comparative Preparation Example 3)
A surface-treated calcium carbonate was obtained in the same manner as in Preparation Example 1 except that heavy calcium carbonate having an average particle diameter of 2 μm was used as the treatment-based calcium carbonate. It was 0.9 mass% when the phosphorus content of the obtained surface treatment calcium carbonate was measured by the ICP emission spectral analysis method.

なお、この重質炭酸カルシウムの形状は、不定形であり、結晶形態はカルサイト結晶である。   In addition, the shape of this heavy calcium carbonate is indefinite, and the crystal form is a calcite crystal.

(比較調製例4)
調製例1の炭酸カルシウム水懸濁液に、水ガラス3号を、合成炭酸カルシウム100質量部に対し、SiOとして2質量部の処理量となるように添加した。添加後、10分間攪拌し、その後、炭酸ガスを導入して炭酸カルシウムの表面にシリカを析出させた。その後、脱水・乾燥・粉砕して、シリカ処理炭酸カルシウムを得た。
(Comparative Preparation Example 4)
Water glass No. 3 was added to the calcium carbonate aqueous suspension of Preparation Example 1 so as to have a treatment amount of 2 parts by mass as SiO 2 with respect to 100 parts by mass of synthetic calcium carbonate. After the addition, the mixture was stirred for 10 minutes, and then carbon dioxide was introduced to precipitate silica on the surface of calcium carbonate. Thereafter, dehydration, drying and pulverization were performed to obtain silica-treated calcium carbonate.

得られたシリカ処理炭酸カルシウムを攪拌混合器に入れ、シリカ処理炭酸カルシウム中の炭酸カルシウム100質量部に対して、2質量部となるように両末端エポキシ変性シリコーンオイルを添加し、80℃で10分間撹拌混合して、シリカ及び有機変性シリコーンオイルで表面処理した表面処理炭酸カルシウムを得た。   The obtained silica-treated calcium carbonate is put into a stirring mixer, and both ends of the epoxy-modified silicone oil are added so as to be 2 parts by mass with respect to 100 parts by mass of calcium carbonate in the silica-treated calcium carbonate. The mixture was stirred and mixed for a minute to obtain surface-treated calcium carbonate surface-treated with silica and organically modified silicone oil.

(比較調製例5)
調製例1の縮合リン酸処理炭酸カルシウムを、有機変性シリコーンオイルで処理せずにそのまま用いた。
(Comparative Preparation Example 5)
The condensed phosphoric acid-treated calcium carbonate of Preparation Example 1 was used as it was without being treated with an organically modified silicone oil.

(比較調製例6)
平均粒子径0.15μmである合成炭酸カルシウムを攪拌混合器に入れ、炭酸カルシウム100質量部に対して、2質量部となるように両末端エポキシ変性シリコーンオイルを添加し、80℃で10分間撹拌混合して、有機変性シリコーンオイルのみで表面処理した表面処理炭酸カルシウムを得た。
(Comparative Preparation Example 6)
Synthetic calcium carbonate having an average particle size of 0.15 μm is placed in a stirring mixer, and both ends of the epoxy-modified silicone oil are added so as to be 2 parts by mass with respect to 100 parts by mass of calcium carbonate. By mixing, a surface-treated calcium carbonate surface-treated only with organically modified silicone oil was obtained.

<実験1>
[白色樹脂組成物の調製]
(実施例1〜4及び比較例1〜4)
樹脂として、ポリアミド樹脂(デュポン社製、ザイテル101L)を用いた。白色顔料としては、酸化チタン(石原産業社製、CR−60−2)を用いた。
<Experiment 1>
[Preparation of white resin composition]
(Examples 1-4 and Comparative Examples 1-4)
As the resin, a polyamide resin (DuPont, Zytel 101L) was used. Titanium oxide (manufactured by Ishihara Sangyo Co., Ltd., CR-60-2) was used as the white pigment.

樹脂60質量部に対し、調製例1で得られた表面処理炭酸カルシウム及び白色顔料を、表1に示す配合量となるように配合し、二軸押出機を用いて造粒した。造粒したペレットを射出成形機で平板状の試験片成形体を作製した。   The surface-treated calcium carbonate and white pigment obtained in Preparation Example 1 were blended with respect to 60 parts by mass of the resin so as to have the blending amounts shown in Table 1, and granulated using a twin screw extruder. A flat test piece compact was produced from the granulated pellets using an injection molding machine.

なお、比較例4においては、表面処理炭酸カルシウムの代わりに、平均粒子径0.15μmの無処理炭酸カルシウムを用いた。   In Comparative Example 4, untreated calcium carbonate having an average particle size of 0.15 μm was used in place of the surface-treated calcium carbonate.

[耐熱性試験前及び耐熱性試験後の白色度の測定]
得られた白色樹脂組成物の成形体について、以下のようにして耐熱性試験前及び耐熱性試験後の白色度を測定した。
[Measurement of whiteness before and after heat resistance test]
About the obtained molded body of the white resin composition, the whiteness before and after the heat resistance test was measured as follows.

白色度の測定は、分光白色度計(東京電色社製ERP−80WX)を用いて、JIS−Z8730に規定されるハンターの色差式による明度(L値)、赤色度(a値)及び黄色度(b値)を3回測定し、3回の平均値を求めた。下記式により、白色度W(ハンター式)を算出した。   The whiteness is measured by using a spectral whiteness meter (ERP-80WX manufactured by Tokyo Denshoku Co., Ltd.), brightness (L value), redness (a value), and yellow according to Hunter's color difference formula defined in JIS-Z8730. The degree (b value) was measured 3 times, and the average value of 3 times was obtained. The whiteness W (Hunter formula) was calculated by the following formula.

W=100−〔(100−L)2+a2+b2〕1/2
式中、aは赤色度(a値)を表し、bは黄色度(b値)を表し、Lは明度(L値)を表す。
W = 100-[(100-L) 2 + a2 + b2] 1/2
In the formula, a represents redness (a value), b represents yellowness (b value), and L represents lightness (L value).

耐熱性試験は、成形体を160℃の雰囲気下に2時間暴露することにより行った。耐熱性試験前及び耐熱性試験後の成形体について、上記のようにして白色度を測定した。   The heat resistance test was performed by exposing the molded body to an atmosphere of 160 ° C. for 2 hours. About the molded object before a heat resistance test and after a heat resistance test, the whiteness was measured as mentioned above.

耐熱性試験前の白色度及び耐熱性試験後の白色度を、表1に示す。   Table 1 shows the whiteness before the heat resistance test and the whiteness after the heat resistance test.

Figure 2017002180
Figure 2017002180

表1に示すように、本発明に従い、白色顔料と表面処理炭酸カルシウムの含有比率を、質量比(白色顔料:表面処理炭酸カルシウム)で、90:10〜60:40の範囲内にした実施例1〜4は、白色顔料:表面処理炭酸カルシウムの含有比率が50:50である比較例1及び白色顔料:表面処理炭酸カルシウムの含有比率が95:5である比較例2に比べ、耐熱性試験前及び耐熱性試験後において、高い白色度を保持している。また、実施例1〜4は、白色顔料のみを40質量%含有する比較例3に比べ、耐熱性試験前後において、高い白色度を保持している。また、実施例1〜4は、表面処理炭酸カルシウムに代えて無処理炭酸カルシウムを用いた比較例4に比べ、耐熱性試験前後において、高い白色度を保持している。したがって、耐熱性試験前後において、高い白色度を保持できる本発明の効果は、表面処理炭酸カルシウムを用いることにより得られていることがわかる。   As shown in Table 1, according to the present invention, the content ratio of the white pigment and the surface-treated calcium carbonate was within a range of 90:10 to 60:40 in terms of mass ratio (white pigment: surface-treated calcium carbonate). 1-4 is a heat resistance test compared to Comparative Example 1 in which the content ratio of white pigment: surface-treated calcium carbonate is 50:50 and Comparative Example 2 in which the content ratio of white pigment: surface-treated calcium carbonate is 95: 5. High whiteness is maintained before and after the heat resistance test. Moreover, Examples 1-4 hold | maintain high whiteness before and behind a heat resistance test compared with the comparative example 3 which contains only 40 mass% of white pigments. Moreover, Examples 1-4 have high whiteness before and behind a heat resistance test compared with the comparative example 4 which replaced with surface treatment calcium carbonate and used untreated calcium carbonate. Therefore, it can be seen that the effect of the present invention capable of maintaining high whiteness before and after the heat resistance test is obtained by using the surface-treated calcium carbonate.

<実験2>
(実施例5)
表2に示すように、樹脂95質量部に対し、白色顔料3.75質量部、表面処理炭酸カルシウム1.25質量部となるように配合する以外は、実施例3と同様にして白色樹脂組成物を得た。
<Experiment 2>
(Example 5)
As shown in Table 2, the white resin composition was the same as in Example 3 except that the white pigment was 3.75 parts by mass and the surface-treated calcium carbonate was 1.25 parts by mass with respect to 95 parts by mass of the resin. I got a thing.

(実施例6)
表2に示すように、樹脂80質量部に対し、白色顔料15質量部、表面処理炭酸カルシウム5質量部となるように配合する以外は、実施例3と同様にして白色樹脂組成物を得た。
(Example 6)
As shown in Table 2, a white resin composition was obtained in the same manner as in Example 3 except that 80 parts by mass of the resin was blended so as to be 15 parts by mass of white pigment and 5 parts by mass of surface-treated calcium carbonate. .

(実施例7)
表2に示すように、樹脂40質量部に対し、白色顔料45質量部、表面処理炭酸カルシウム15質量部となるように配合する以外は、実施例3と同様にして白色樹脂組成物を得た。
(Example 7)
As shown in Table 2, a white resin composition was obtained in the same manner as in Example 3 except that 40 parts by mass of the resin was blended so as to be 45 parts by mass of white pigment and 15 parts by mass of surface-treated calcium carbonate. .

(実施例8)
表2に示すように、樹脂30質量部に対し、白色顔料52.5質量部、表面処理炭酸カルシウム17.5質量部となるように配合する以外は、実施例3と同様にして白色樹脂組成物を得た。
(Example 8)
As shown in Table 2, the white resin composition was the same as in Example 3 except that 52.5 parts by weight of the white pigment and 17.5 parts by weight of the surface-treated calcium carbonate were blended with respect to 30 parts by weight of the resin. I got a thing.

(比較例5)
表2に示すように、樹脂97質量部に対し、白色顔料2.25質量部、表面処理炭酸カルシウム0.75質量部となるように配合する以外は、実施例3と同様にして白色樹脂組成物を得た。
(Comparative Example 5)
As shown in Table 2, with respect to 97 parts by mass of the resin, the white resin composition was obtained in the same manner as in Example 3 except that the white pigment was 2.25 parts by mass and the surface treated calcium carbonate was 0.75 parts by mass. I got a thing.

なお、白色顔料及び表面処理炭酸カルシウムの合計の含有量が、70質量%を超えると、粘度が高くなり白色樹脂組成物の調製が困難になった。   In addition, when the total content of the white pigment and the surface-treated calcium carbonate exceeded 70% by mass, the viscosity became high and it was difficult to prepare a white resin composition.

[耐熱性試験前及び耐熱性試験後の白色度の測定]
実験1と同様にして、得られた各実施例及び各比較例の白色樹脂組成物の成形体について、耐熱性試験前及び耐熱性試験後の白色度を測定した。測定結果を表2に示す。表2には、実施例3の結果も併せて示す。
[Measurement of whiteness before and after heat resistance test]
In the same manner as in Experiment 1, the whiteness before and after the heat resistance test was measured for the molded bodies of the white resin compositions obtained in the respective Examples and Comparative Examples. The measurement results are shown in Table 2. Table 2 also shows the results of Example 3.

Figure 2017002180
Figure 2017002180

表2に示すように、本発明に従い、樹脂組成物中の白色顔料及び表面処理炭酸カルシウムの合計の含有量が、5〜70質量%の範囲内である実施例3及び実施例5〜8は、耐熱性試験前後において、高い白色度を保持している。一方、樹脂組成物中の白色顔料及び表面処理炭酸カルシウムの合計の含有量が3質量%である比較例5では、耐熱性試験前後において高い白色度が得られていない。   As shown in Table 2, according to the present invention, Example 3 and Examples 5-8, in which the total content of the white pigment and the surface-treated calcium carbonate in the resin composition is in the range of 5 to 70% by mass, High whiteness is maintained before and after the heat resistance test. On the other hand, in Comparative Example 5 in which the total content of the white pigment and the surface-treated calcium carbonate in the resin composition is 3% by mass, high whiteness is not obtained before and after the heat resistance test.

<実験3>
(実施例9)
調製例2で得られた表面処理炭酸カルシウムを用いる以外は、実施例3と同様にして白色樹脂組成物を得た。
<Experiment 3>
Example 9
A white resin composition was obtained in the same manner as in Example 3 except that the surface-treated calcium carbonate obtained in Preparation Example 2 was used.

(実施例10)
調製例3で得られた表面処理炭酸カルシウムを用いる以外は、実施例3と同様にして白色樹脂組成物を得た。
(Example 10)
A white resin composition was obtained in the same manner as in Example 3 except that the surface-treated calcium carbonate obtained in Preparation Example 3 was used.

(実施例11)
調製例4で得られた表面処理炭酸カルシウムを用いる以外は、実施例3と同様にして白色樹脂組成物を得た。
Example 11
A white resin composition was obtained in the same manner as in Example 3 except that the surface-treated calcium carbonate obtained in Preparation Example 4 was used.

(実施例12)
調製例5で得られた表面処理炭酸カルシウムを用いる以外は、実施例3と同様にして白色樹脂組成物を得た。
(Example 12)
A white resin composition was obtained in the same manner as in Example 3 except that the surface-treated calcium carbonate obtained in Preparation Example 5 was used.

(実施例13)
調製例6で得られた表面処理炭酸カルシウムを用いる以外は、実施例3と同様にして白色樹脂組成物を得た。
(Example 13)
A white resin composition was obtained in the same manner as in Example 3 except that the surface-treated calcium carbonate obtained in Preparation Example 6 was used.

(比較例6)
比較調製例1で得られた表面処理炭酸カルシウムを用いる以外は、実施例3と同様にして白色樹脂組成物を得た。
(Comparative Example 6)
A white resin composition was obtained in the same manner as in Example 3 except that the surface-treated calcium carbonate obtained in Comparative Preparation Example 1 was used.

(比較例7)
比較調製例2で得られた表面処理炭酸カルシウムを用いる以外は、実施例3と同様にして白色樹脂組成物を得た。
(Comparative Example 7)
A white resin composition was obtained in the same manner as in Example 3 except that the surface-treated calcium carbonate obtained in Comparative Preparation Example 2 was used.

(比較例8)
比較調製例3で得られた表面処理炭酸カルシウムを用いる以外は、実施例3と同様にして白色樹脂組成物を得た。
(Comparative Example 8)
A white resin composition was obtained in the same manner as in Example 3 except that the surface-treated calcium carbonate obtained in Comparative Preparation Example 3 was used.

[耐熱性試験前及び耐熱性試験後の白色度の測定]
実験1と同様にして、得られた各実施例及び各比較例の白色樹脂組成物の成形体について、耐熱性試験前及び耐熱性試験後の白色度を測定した。測定結果を表3に示す。表3には、実施例3の結果も併せて示す。
[Measurement of whiteness before and after heat resistance test]
In the same manner as in Experiment 1, the whiteness before and after the heat resistance test was measured for the molded bodies of the white resin compositions obtained in the respective Examples and Comparative Examples. Table 3 shows the measurement results. Table 3 also shows the results of Example 3.

Figure 2017002180
Figure 2017002180

表3に示すように、本発明に従い、平均粒子径0.05〜1μmの範囲内である合成炭酸カルシウムを用いて表面処理炭酸カルシウムを調製している実施例3及び実施例9〜13は、耐熱性試験前後において、高い白色度を保持している。一方、炭酸カルシウムの平均粒子径が本発明の範囲外である比較例6〜8では、耐熱性試験前後において高い白色度が得られていない。   As shown in Table 3, according to the present invention, Example 3 and Examples 9 to 13 in which surface-treated calcium carbonate was prepared using synthetic calcium carbonate having an average particle diameter in the range of 0.05 to 1 μm, High whiteness is maintained before and after the heat resistance test. On the other hand, in Comparative Examples 6 to 8 in which the average particle diameter of calcium carbonate is outside the range of the present invention, high whiteness is not obtained before and after the heat resistance test.

<実験4>
(実施例14)
調製例7で得られた表面処理炭酸カルシウムを用いる以外は、実施例3と同様にして、白色樹脂組成物を得た。
<Experiment 4>
(Example 14)
A white resin composition was obtained in the same manner as in Example 3 except that the surface-treated calcium carbonate obtained in Preparation Example 7 was used.

(実施例15)
調製例8で得られた表面処理炭酸カルシウムを用いる以外は、実施例3と同様にして、白色樹脂組成物を得た。
(Example 15)
A white resin composition was obtained in the same manner as in Example 3 except that the surface-treated calcium carbonate obtained in Preparation Example 8 was used.

(実施例16)
調製例9で得られた表面処理炭酸カルシウムを用いる以外は、実施例3と同様にして、白色樹脂組成物を得た。
(Example 16)
A white resin composition was obtained in the same manner as in Example 3 except that the surface-treated calcium carbonate obtained in Preparation Example 9 was used.

(実施例17)
調製例10で得られた表面処理炭酸カルシウムを用いる以外は、実施例3と同様にして、白色樹脂組成物を得た。
(Example 17)
A white resin composition was obtained in the same manner as in Example 3 except that the surface-treated calcium carbonate obtained in Preparation Example 10 was used.

[耐熱性試験前及び耐熱性試験後の白色度の測定]
実験1と同様にして、得られた各実施例及び各比較例の白色樹脂組成物の成形体について、耐熱性試験前及び耐熱性試験後の白色度を測定した。測定結果を表4に示す。表4には、実施例3の結果も併せて示す。
[Measurement of whiteness before and after heat resistance test]
In the same manner as in Experiment 1, the whiteness before and after the heat resistance test was measured for the molded bodies of the white resin compositions obtained in the respective Examples and Comparative Examples. Table 4 shows the measurement results. Table 4 also shows the results of Example 3.

Figure 2017002180
Figure 2017002180

表4に示すように、表面処理炭酸カルシウム中のリン含有量が0.2〜2質量%の範囲内であり、有機変性シリコーンオイルの処理量が炭酸カルシウム100質量部に対して0.1〜10質量部の範囲内である実施例3及び実施例14〜17は、耐熱性試験前後において、高い白色度を保持している。   As shown in Table 4, the phosphorus content in the surface-treated calcium carbonate is in the range of 0.2 to 2% by mass, and the treatment amount of the organically modified silicone oil is 0.1 to 100 parts by mass of calcium carbonate. In Example 3 and Examples 14 to 17 within the range of 10 parts by mass, high whiteness is maintained before and after the heat resistance test.

<実験5>
(実施例18)
調製例11で得られた表面処理炭酸カルシウムを用いる以外は、実施例3と同様にして白色樹脂組成物を得た。
<Experiment 5>
(Example 18)
A white resin composition was obtained in the same manner as in Example 3 except that the surface-treated calcium carbonate obtained in Preparation Example 11 was used.

(実施例19)
調製例12で得られた表面処理炭酸カルシウムを用いる以外は、実施例3と同様にして白色樹脂組成物を得た。
(Example 19)
A white resin composition was obtained in the same manner as in Example 3 except that the surface-treated calcium carbonate obtained in Preparation Example 12 was used.

(比較例9)
比較調製例4で得られた表面処理炭酸カルシウムを用いる以外は、実施例3と同様にして白色樹脂組成物を得た。
(Comparative Example 9)
A white resin composition was obtained in the same manner as in Example 3 except that the surface-treated calcium carbonate obtained in Comparative Preparation Example 4 was used.

(比較例10)
比較調製例5で得られた表面処理炭酸カルシウムを用いる以外は、実施例3と同様にして白色樹脂組成物を得た。
(Comparative Example 10)
A white resin composition was obtained in the same manner as in Example 3 except that the surface-treated calcium carbonate obtained in Comparative Preparation Example 5 was used.

(比較例11)
比較調製例6で得られた表面処理炭酸カルシウムを用いる以外は、実施例3と同様にして白色樹脂組成物を得た。
(Comparative Example 11)
A white resin composition was obtained in the same manner as in Example 3 except that the surface-treated calcium carbonate obtained in Comparative Preparation Example 6 was used.

[耐熱性試験前及び耐熱性試験後の白色度の測定]
実験1と同様にして、得られた各実施例及び各比較例の白色樹脂組成物の成形体について、耐熱性試験前及び耐熱性試験後の白色度を測定した。測定結果を表5に示す。表5には、実施例3の結果も併せて示す。
[Measurement of whiteness before and after heat resistance test]
In the same manner as in Experiment 1, the whiteness before and after the heat resistance test was measured for the molded bodies of the white resin compositions obtained in the respective Examples and Comparative Examples. Table 5 shows the measurement results. Table 5 also shows the results of Example 3.

Figure 2017002180
Figure 2017002180

表5に示すように、縮合リン酸としてメタリン酸を用いた実施例18、及び有機変性シリコーンオイルとして片末端エポキシ変性シリコーンオイルを用いた実施例19でも、耐熱性試験前後において、高い白色度を保持されていることがわかる。一方、縮合リン酸に代えて、シリカ処理した比較例9、縮合リン酸処理のみ行った比較例10、及び有機変性シリコーンオイル処理のみ行った比較例11では、耐熱性試験前後において高い白色度が得られていない。   As shown in Table 5, even in Example 18 using metaphosphoric acid as condensed phosphoric acid and Example 19 using one-end epoxy-modified silicone oil as organically modified silicone oil, high whiteness was obtained before and after the heat resistance test. It can be seen that it is retained. On the other hand, instead of condensed phosphoric acid, in Comparative Example 9 treated with silica, Comparative Example 10 treated only with condensed phosphoric acid, and Comparative Example 11 treated only with organic modified silicone oil, high whiteness was observed before and after the heat resistance test. Not obtained.

Claims (5)

白色顔料と、平均粒子径0.05〜1μmの合成炭酸カルシウムの表面を縮合リン酸及び有機変性シリコーンオイルで表面処理した表面処理炭酸カルシウムと、樹脂とを含む白色樹脂組成物であって、
前記白色顔料と前記表面処理炭酸カルシウムの含有比率が、質量比(白色顔料:表面処理炭酸カルシウム)で、90:10〜60:40の範囲内であり、
樹脂組成物中の前記白色顔料及び前記表面処理炭酸カルシウムの合計の含有量が、5〜70質量%の範囲内である、白色樹脂組成物。
A white resin composition comprising a white pigment, a surface-treated calcium carbonate having a surface treated with condensed phosphoric acid and an organically modified silicone oil on the surface of synthetic calcium carbonate having an average particle size of 0.05 to 1 μm, and a resin,
The content ratio of the white pigment and the surface-treated calcium carbonate is in the range of 90:10 to 60:40 in terms of mass ratio (white pigment: surface-treated calcium carbonate),
The white resin composition whose total content of the said white pigment and the said surface treatment calcium carbonate in a resin composition exists in the range of 5-70 mass%.
前記表面処理炭酸カルシウム中のリン含有量が、0.2〜2質量%の範囲内となるように、前記縮合リン酸で炭酸カルシウムが表面処理されている、請求項1に記載の白色樹脂組成物。   The white resin composition according to claim 1, wherein the calcium carbonate is surface-treated with the condensed phosphoric acid so that a phosphorus content in the surface-treated calcium carbonate is in a range of 0.2 to 2% by mass. object. 前記表面処理炭酸カルシウムにおける前記有機変性シリコーンオイルの処理量が、炭酸カルシウム100質量部に対して、0.1〜10質量部の範囲内である、請求項1または2に記載の白色樹脂組成物。   The white resin composition according to claim 1 or 2, wherein a treatment amount of the organically modified silicone oil in the surface-treated calcium carbonate is within a range of 0.1 to 10 parts by mass with respect to 100 parts by mass of calcium carbonate. . 前記有機変性シリコーンオイルが、エポキシ変性シリコーンオイルである、請求項1〜3のいずれか1項に記載の白色樹脂組成物。   The white resin composition according to any one of claims 1 to 3, wherein the organically modified silicone oil is an epoxy modified silicone oil. 前記白色顔料が、酸化チタンである、請求項1〜4のいずれか1項に記載の白色樹脂組成物。   The white resin composition according to any one of claims 1 to 4, wherein the white pigment is titanium oxide.
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