JP2006124622A - POLISHING alpha-ALUMINA COMPOSITION, AND METHOD FOR PRODUCING THE SAME - Google Patents
POLISHING alpha-ALUMINA COMPOSITION, AND METHOD FOR PRODUCING THE SAME Download PDFInfo
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Description
本発明は、研磨用α−アルミナ組成物及びその製造方法に関する。さらに詳しくは、自動車塗装表面、プラスチック部品表面、金属表面、ガラス表面をバフ研磨又は手磨きする際の仕上げ磨き用研磨組成物に用いる研磨用α−アルミナ組成物及びその製造方法に関する。 The present invention relates to an α-alumina composition for polishing and a method for producing the same. More specifically, the present invention relates to an α-alumina composition for polishing used for a polishing composition for finish polishing when buffing or hand polishing an automobile paint surface, a plastic part surface, a metal surface, or a glass surface, and a method for producing the same.
α−アルミナは、バフ研磨用組成物等に研磨粒子として一般的に用いられているが、硬度が非常に高いために、高硬質面の研磨には良好であるが、自動車塗装表面、プラスチック部品表面等のやや軟質な表面では、研磨キズが残りやすく、特に、自動車塗装表面のように高度な仕上がりを必要とする場合は、仕上げ用途では満足のいくものではなかった。
市販の研磨用α−アルミナは、α結晶粒子径が１μｍ以上の大きいものは、粉砕して粒度を小さく調整しても、研磨キズが深くなり、α結晶粒子径が１μｍ以下の小さいものは、粒度調整することによって、研磨キズは浅くなるが、光沢良く仕上がらず、５０％平均粒子径を１μｍ程度に調整すれば、光沢はよくなるものの、研磨力が低下するという問題があり、自動車塗装表面、プラスチック部品表面、金属表面、ガラス表面等の仕上げ研磨には不適当であった。
α-Alumina is generally used as abrasive particles in buffing compositions and the like, but because of its very high hardness, it is good for polishing highly rigid surfaces, but it is used for automotive painted surfaces, plastic parts. A slightly soft surface such as a surface is likely to have polishing scratches, and is not satisfactory in finishing applications, particularly when a high degree of finish is required, such as a car paint surface.
Commercially available α-alumina for polishing has a large α crystal particle diameter of 1 μm or more, and even if it is pulverized to adjust the particle size to a small size, the polishing scratches become deep, and the α crystal particle diameter of 1 μm or less is small. By adjusting the particle size, the polishing scratches become shallow, but it does not finish with a high gloss, and if the 50% average particle size is adjusted to about 1 μm, the gloss will improve, but there will be a problem that the polishing power will decrease, It was unsuitable for finish polishing of plastic part surfaces, metal surfaces, glass surfaces, and the like.
このように前記従来の仕上げ磨き用研磨組成物に用いるα−アルミナには
特に、自動車塗装表面の仕上げ研磨において、仕上がり状態が不十分な場合があった。
本発明は、かかる事情に鑑みなされたものであって、自動車塗装表面等の仕上げ研磨において、良好な研磨力を有し、研磨キズを残さず、かつ光沢良く仕上げることができる仕上げ磨き用研磨組成物に用いるα−アルミナとその製造方法を提供することを目的とする。
これによって、従来不十分であった仕上げ磨き用研磨組成物に用いるα−アルミナの研磨力と仕上がり性が同時に改善され、自動車塗装表面等の良好な仕上げ研磨を行うことができる。
As described above, the α-alumina used in the conventional polishing composition for finish polishing may have an insufficient finished state particularly in the finish polishing of the automobile paint surface.
The present invention has been made in view of such circumstances, and has a good polishing power in finish polishing of automobile paint surfaces and the like, and does not leave polishing scratches and can be finished with a high gloss. It aims at providing the alpha alumina used for a thing, and its manufacturing method.
As a result, the polishing power and finish of α-alumina used in the polishing composition for finish polishing, which has been insufficient in the past, are improved at the same time, and satisfactory finish polishing of the automobile paint surface and the like can be performed.
本発明者らは、鋭意研究した結果、研磨粒子として水や有機溶剤に分散した研磨組成物に用いるα−アルミナであって、α結晶粒子径が1μｍ以下であり、かつ、吸油量が50ｍｌ/100g以上であり、かつ、50％平均粒子径が２〜８μｍ、90％粒子径が20μｍ以下であることを特徴とする研磨用α−アルミナ組成物であれば、目的を達することがわかった。また、このような研磨用α−アルミナ組成物は、50％平均粒子径が２〜８μｍ、90％粒子径が20μｍ以下である水酸化アルミニウムを1050〜1250℃で焼成することによって得られることがわかった。 As a result of diligent research, the inventors of the present invention are α-alumina used in a polishing composition dispersed in water or an organic solvent as abrasive particles, the α crystal particle diameter is 1 μm or less, and the oil absorption is 50 ml / The polishing α-alumina composition having a weight of 100 g or more, a 50% average particle diameter of 2 to 8 μm, and a 90% particle diameter of 20 μm or less has been found to achieve the object. Further, such an α-alumina composition for polishing can be obtained by firing aluminum hydroxide having a 50% average particle diameter of 2 to 8 μm and a 90% particle diameter of 20 μm or less at 1050 to 1250 ° C. all right.
本発明の研磨組成物用α−アルミナを用いると、表１の結果から明らかなように、研磨速度に優れ、研磨キズが残らず、研磨後の仕上がりが良い研磨組成物を提供することができた。 When the α-alumina for polishing composition of the present invention is used, as is apparent from the results of Table 1, it is possible to provide a polishing composition that is excellent in polishing rate, has no polishing scratches, and has a good finish after polishing. It was.
本発明の研磨用α−アルミナ組成物は、研磨粒子として水や有機溶剤に分散した研磨組成物に用いるα−アルミナであって、α結晶粒子径は、1μｍ以下であることが好ましく、さらに好ましくは０．５μｍ以下である。α結晶粒子径が１μｍ以上では自動車塗装表面などの被研磨面に研磨キズを残しやすく、光沢が不良となる。
吸油量は、アマニ油吸油量（JIS K 5101に規定するもの）を表し、50ｍｌ/100g以上であることが好ましく、さらに好ましくは65ｍｌ/100g以上である。吸油量が50ｍｌ/100g以下であると、光沢が不良となる。
The α-alumina composition for polishing of the present invention is α-alumina used in a polishing composition dispersed in water or an organic solvent as abrasive particles, and the α crystal particle diameter is preferably 1 μm or less, more preferably. Is 0.5 μm or less. When the α crystal particle diameter is 1 μm or more, it is easy to leave a scratch on the surface to be polished such as the painted surface of an automobile, resulting in poor gloss.
The oil absorption represents the oil absorption of linseed oil (as defined in JIS K 5101), preferably 50 ml / 100 g or more, and more preferably 65 ml / 100 g or more. When the oil absorption is 50 ml / 100 g or less, the gloss is poor.
市販のα−アルミナは、水酸化アルミニウムを焼成後に粉砕して粒度調整していることが多く、粉砕過程でα−アルミナの吸油量が低下するという問題があった。
本発明においては、焼成前に粒度調整を行い、焼成後は粉砕しないというα−アルミナの製造方法を行なった結果、焼成後に粉砕する場合より吸油量の高いα−アルミナ組成物が得られこれが研磨用に適していることを確かめた。
粒子径は、体積基準の積算％粒子径を表し、50％平均粒子径は２〜８μｍ、90％粒子径は20μｍ以下であることが好ましく、さらに好ましくは、50％平均粒子径は４〜６μｍ、90％粒子径は15μｍ以下である。50％平均粒子径が２μｍより小さいと研磨力が低下し、８μｍより大きいと研磨キズが目立ち、光沢が低下する。90％粒子径が20μｍより大きいと研磨キズが目立つ。
Commercially available α-alumina often has a particle size adjusted by pulverizing aluminum hydroxide after firing, and there is a problem that the oil absorption of α-alumina decreases during the pulverization process.
In the present invention, as a result of the production method of α-alumina in which the particle size is adjusted before firing and not pulverized after firing, an α-alumina composition having a higher oil absorption than when pulverized after firing is obtained. Confirmed that it is suitable for use.
The particle diameter represents an integrated% particle diameter on a volume basis, the 50% average particle diameter is preferably 2 to 8 μm, the 90% particle diameter is preferably 20 μm or less, and more preferably, the 50% average particle diameter is 4 to 6 μm. The 90% particle size is 15 μm or less. When the 50% average particle diameter is smaller than 2 μm, the polishing power is reduced, and when it is larger than 8 μm, polishing scratches are noticeable and the gloss is lowered. When the 90% particle diameter is larger than 20 μm, scratches on the polishing are conspicuous.
本発明の研磨用α−アルミナ組成物の製造方法は、50％平均粒子径が２〜８μｍ、90％粒子径が20μｍ以下である水酸化アルミニウムを原料とするのが好ましく、より好ましくは50％平均粒子径が４〜６μｍ、90％粒子径が15μｍ以下である。
原料とする水酸化アルミニウムの粒度を調整する理由は、目的とするα−アルミナの粒度と対応させるためであり、焼成後に粉砕による粒度調整をしないためである。
本発明の研磨用α−アルミナ組成物は、電子顕微鏡で観察すると、α−アルミナ結晶の凝集体であり、凝集体の形状は、多角形板状であることがわかった。
The method for producing the polishing α-alumina composition of the present invention preferably uses aluminum hydroxide having a 50% average particle diameter of 2 to 8 μm and a 90% particle diameter of 20 μm or less, more preferably 50%. The average particle size is 4-6 μm, and the 90% particle size is 15 μm or less.
The reason for adjusting the particle size of the aluminum hydroxide used as a raw material is to make it correspond to the target α-alumina particle size and not to adjust the particle size by pulverization after firing.
When the α-alumina composition for polishing of the present invention was observed with an electron microscope, it was found to be an aggregate of α-alumina crystals, and the shape of the aggregate was a polygonal plate.
このような水酸化アルミニウムの例としては、Ｂ−７０３（日本軽金属製）が挙げられる。
α−アルミナの焼成炉は、電気炉、ガス炉等所定の温度で焼成できれば何でもよいが、焼成雰囲気が酸化雰囲気で、大気圧で焼成可能な電気炉が望ましい。
α−アルミナの焼成温度は、1050〜1250℃が好ましく、より好ましくは1120〜1180℃である。α−アルミナの焼成温度が1050℃より低いとアルミナ結晶のα化率が低すぎるため、このようなアルミナでは研磨組成物に用いた場合、研磨力が低下する。α−アルミナの焼成温度が1250℃より高いとα−アルミナの結晶が成長しすぎるために、研磨組成物に用いた場合、微細な線キズが目立つようになる。
An example of such aluminum hydroxide is B-703 (manufactured by Nippon Light Metal).
The α-alumina firing furnace may be anything as long as it can be fired at a predetermined temperature, such as an electric furnace or a gas furnace, but an electric furnace capable of firing at an atmospheric pressure in an oxidizing atmosphere is desirable.
The firing temperature of α-alumina is preferably 1050 to 1250 ° C, more preferably 1120 to 1180 ° C. When the firing temperature of α-alumina is lower than 1050 ° C., the α conversion rate of the alumina crystals is too low, so that when such alumina is used in a polishing composition, the polishing power is lowered. When the firing temperature of α-alumina is higher than 1250 ° C., α-alumina crystals grow too much, and when used in the polishing composition, fine line scratches become conspicuous.
本発明によるα−アルミナを特定する手段として、電子顕微鏡で粒子の形状を観察したり、α結晶粒子径を計測する以外に、Ｘ線回折装置を用いて、特定の回折角における強度比を調べる方法がある。本発明による研磨用α−アルミナにおいては、回折角２θ（deg）＝３５．２付近のピーク強度（I2）と回折角２θ（deg）＝６６．５付近のピーク強度（I12）の強度比が、I2：I12＝１００：２５〜３５であることがわかった。
As means for specifying α-alumina according to the present invention, in addition to observing the shape of the particles with an electron microscope or measuring the α crystal particle diameter, the intensity ratio at a specific diffraction angle is examined using an X-ray diffractometer. There is a way. In the α-alumina for polishing according to the present invention, the intensity of the peak intensity (I 2 ) near the diffraction angle 2θ (deg) = 35.2 and the intensity of the peak intensity (I 12 ) near the diffraction angle 2θ (deg) = 66.5. The ratio was found to be I 2 : I 12 = 100: 25-35.
本発明の実施の形態をまとめると以下の通りである。
（１）研磨粒子として水や有機溶剤に分散した研磨組成物に用いるα−アルミナであって、α結晶粒子径が1μｍ以下であり、かつ、吸油量が50ｍｌ/100g以上であり、かつ、50％平均粒子径が２〜８μｍ、90％粒子径が20μｍ以下であることを特徴とする研磨用α−アルミナ組成物。
（２）粒子の形状が、多角形板状であることを特徴とする上記１記載の研磨用α−アルミナ組成物。
（３）Ｘ線回折法による回折角２θ（deg）＝３５．２付近のピーク強度（I2）と回折角２θ（deg）＝６６．５付近のピーク強度（I12）の強度比が、I2：I12＝１００：２５〜３５であることを特徴とする上記１及び２に記載の研磨用α−アルミナ組成物。
The embodiments of the present invention are summarized as follows.
(1) α-alumina used in a polishing composition dispersed in water or an organic solvent as abrasive particles, the α crystal particle diameter is 1 μm or less, the oil absorption is 50 ml / 100 g or more, and 50 A polishing α-alumina composition having a% average particle size of 2 to 8 μm and a 90% particle size of 20 μm or less.
(2) The α-alumina composition for polishing as described in 1 above, wherein the shape of the particles is a polygonal plate.
(3) The intensity ratio of the peak intensity (I 2 ) near the diffraction angle 2θ (deg) = 35.2 by the X-ray diffraction method and the peak intensity (I 12 ) near the diffraction angle 2θ (deg) = 66.5 is The polishing α-alumina composition as described in 1 or 2 above, wherein I 2 : I 12 = 100: 25 to 35.
（４）50％平均粒子径が２〜８μｍ、90％粒子径が20μｍ以下である水酸化アルミニウムを1050〜1250℃で焼成することによって得られる上記１〜上記３に記載された研磨用α−アルミナ組成物の製造方法。
（５）上記１〜上記３に記載された研磨用α−アルミナ組成物を、塗装表面、プラスチック表面、金属表面、ガラス表面の研磨用組成物に添加して用いること。
次に実施例によって本発明をさらに具体的に詳細に亘って説明するが、本発明はこれらの例によって何ら限定されるものではない。
(4) Polishing α- described in the above 1 to 3 obtained by firing aluminum hydroxide having a 50% average particle size of 2 to 8 μm and a 90% particle size of 20 μm or less at 1050 to 1250 ° C. A method for producing an alumina composition.
(5) The polishing α-alumina composition described in 1 to 3 above is used by adding it to the polishing composition for a coating surface, a plastic surface, a metal surface, or a glass surface.
EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by these examples.
水酸化アルミニウム（B703、50％平均粒子径3.8μｍ、90%粒子径7.2μｍ、日本軽金属製）１ｋｇを焼成用の鞘に入れ、電気炉で、約100℃／時間で昇温させ、1180℃、3.5時間保持し、α−アルミナを焼成した。焼結体を解砕して研磨用α−アルミナ組成物を得た。α−アルミナ組成物の吸油量は72ｍｌ/100gであり、50％平均粒子径は4.4μｍ、90%粒子径は15.6μｍであった。 1kg of aluminum hydroxide (B703, 50% average particle size 3.8μm, 90% particle size 7.2μm, made by Nippon Light Metal Co., Ltd.) is put in a sheath for firing, heated in an electric furnace at about 100 ℃ / hour, 1180 ℃ For 3.5 hours, and calcined α-alumina. The sintered body was crushed to obtain an α-alumina composition for polishing. The oil absorption of the α-alumina composition was 72 ml / 100 g, the 50% average particle size was 4.4 μm, and the 90% particle size was 15.6 μm.
水酸化アルミニウム（B703、50％平均粒子径3.8μｍ、90%粒子径7.2μｍ、日本軽金属製）１ｋｇを焼成用の鞘に入れ、電気炉で、約100℃／時間で昇温させ、1150℃、3.5時間保持し、α−アルミナを焼成した。焼結体を解砕して研磨用α−アルミナ組成物を得た。α−アルミナ組成物の吸油量は75ｍｌ/100gであり、50％平均粒子径は4.5μｍ、90%粒子径は13.1μｍであった。 1kg of aluminum hydroxide (B703, 50% average particle size 3.8μm, 90% particle size 7.2μm, made by Nippon Light Metal Co., Ltd.) is put in a sheath for firing, heated in an electric furnace at about 100 ℃ / hour, 1150 ℃ For 3.5 hours, and calcined α-alumina. The sintered body was crushed to obtain an α-alumina composition for polishing. The oil absorption of the α-alumina composition was 75 ml / 100 g, the 50% average particle size was 4.5 μm, and the 90% particle size was 13.1 μm.
水酸化アルミニウム（B703、50％平均粒子径3.8μｍ、90%粒子径7.2μｍ、日本軽金属製）１ｋｇを焼成用の鞘に入れ、電気炉で、約100℃／時間で昇温させ、1120℃、3.5時間保持し、α−アルミナを焼成した。焼結体を解砕して研磨用α−アルミナ組成物を得た。α−アルミナ組成物の吸油量は73ｍｌ/100gであり、50％平均粒子径は4.6μｍ、90%粒子径は12.2μｍであった。 1kg of aluminum hydroxide (B703, 50% average particle size 3.8μm, 90% particle size 7.2μm, made by Nippon Light Metal Co., Ltd.) is placed in a sheath for firing, heated in an electric furnace at about 100 ℃ / hour, 1120 ℃ For 3.5 hours, and calcined α-alumina. The sintered body was crushed to obtain an α-alumina composition for polishing. The oil absorption of the α-alumina composition was 73 ml / 100 g, the 50% average particle size was 4.6 μm, and the 90% particle size was 12.2 μm.
（比較例１）
水酸化アルミニウム（B103、50％平均粒子径6.0μｍ、90%粒子径22.8μｍ、日本軽金属製）１ｋｇを焼成用の鞘に入れ、電気炉で、約100℃／時間で昇温させ、1150℃、3.5時間保持し、α−アルミナを焼成した。焼結体を解砕してα−アルミナ組成物を得た。α−アルミナ組成物の吸油量は72ｍｌ/100gであり、50％平均粒子径は7.3μｍ、90%粒子径は22.3μｍであった。
(Comparative Example 1)
1kg of aluminum hydroxide (B103, 50% average particle size 6.0μm, 90% particle size 22.8μm, made by Nippon Light Metal Co., Ltd.) is placed in a sheath for firing, heated in an electric furnace at about 100 ℃ / hour, 1150 ℃ For 3.5 hours, and calcined α-alumina. The sintered body was crushed to obtain an α-alumina composition. The oil absorption of the α-alumina composition was 72 ml / 100 g, the 50% average particle size was 7.3 μm, and the 90% particle size was 22.3 μm.
（比較例２）
水酸化アルミニウム（H42、50％平均粒子径1.0μｍ、90%粒子径4.2μｍ、昭和電工製）１ｋｇを焼成用の鞘に入れ、電気炉で、約100℃／時間で昇温させ、1200℃、3.5時間保持したが、α−アルミナは得られず、κ−アルミナが得られた。焼結体を解砕後の50％平均粒子径は3.3μｍ、90%粒子径は6.1μｍであった。
(Comparative Example 2)
1kg of aluminum hydroxide (H42, 50% average particle size 1.0μm, 90% particle size 4.2μm, Showa Denko) is put into a sheath for firing, heated in an electric furnace at about 100 ℃ / hour, 1200 ℃ For 3.5 hours, α-alumina was not obtained, and κ-alumina was obtained. The 50% average particle size after pulverization of the sintered body was 3.3 μm, and the 90% particle size was 6.1 μm.
（比較例３）
50％平均粒子径が40μｍ、α結晶粒径が１μｍ以下のα−アルミナ（A-26、住友化学製）をボールミルで粉砕して50％平均粒子径が5.1μｍ、90%粒子径が16.6μｍであるα−アルミナを得た。このα−アルミナの吸油量は35ｍｌ/100gであった。
(Comparative Example 3)
Α-Alumina (A-26, manufactured by Sumitomo Chemical Co., Ltd.) with a 50% average particle size of 40μm and an α crystal particle size of 1μm or less is pulverized with a ball mill and the 50% average particle size is 5.1μm and the 90% particle size is 16.6μm. Α-alumina was obtained. The oil absorption of this α-alumina was 35 ml / 100 g.
実施例１〜３、比較例１〜３で得られたα−アルミナ組成物を用いて研磨組成物を調合し、バフ研磨試験を行ってそれぞれの性能を評価した。
（１）研磨組成物の調合（実施例１〜３、比較例１〜３共通）
水５２．５ｇ中に会合型アルカリ可溶性アクリルポリマー（ロームアンドハースジャパン株式会社製プライマル
ＴＴ−６１５）１ｇ、グリセリン２ｇ、ポリオキシエチレンソルビタンモノオレエート（花王株式会社製レオドールＴＷ−Ｏ１２０）０．５ｇを均一に混合し、実施例１〜３、比較例１〜３で得られたα−アルミナ組成物を１０ｇ均一に分散させた。ストッダードソルベント（日石三菱株式会社製ニューソルベントＦ）３０ｇに、流動パラフィン（クロンプトン社製）２ｇ、ヒマシ油１ｇ、ポリオキシエチレンソルビタンモノオレエート（花王株式会社製レオドールＴＷ−Ｏ１０６）０．５ｇ混合して、研磨粒子分散液中に乳化させた後、アルカリ剤としてトリエタノールアミン０．５ｇを添加して組成物を増粘させ、研磨組成物を得た。
（２）バフ研磨試験
普通乗用車の黒色ボンネット塗装（補修用速乾ウレタン塗料を塗装したもの）表面を耐水ペーパー＃２０００を用いて軽く水研ぎした。上記（１）で調整した研磨組成物とスポンジバフを用いてペーパー磨き跡の修正を行ない、ペーパー目（ペーパーの磨き傷）の除去速度、仕上げ後のバフ目（バフ及びコンパウンドによる磨き傷）、光沢について評価した。
バフ研磨条件：電動ポリッシャー（リョービ株式会社製ＰＥ―２０００）
ポリッシャー回転速度・・・１５００ｒｐｍ
バフ・・・スポンジバフ（石原薬品製Ｂ−５００）
押圧荷重・・・４ｋｇ
Polishing compositions were prepared using the α-alumina compositions obtained in Examples 1 to 3 and Comparative Examples 1 to 3, and a buffing test was performed to evaluate each performance.
(1) Preparation of polishing composition (common to Examples 1-3 and Comparative Examples 1-3)
1g of associative alkali-soluble acrylic polymer (Primal TT-615 manufactured by Rohm and Haas Japan Co., Ltd.), 5g of polyoxyethylene sorbitan monooleate (Rheodor TW-O120 manufactured by Kao Corporation) in 52.5g of water Were uniformly mixed, and 10 g of the α-alumina composition obtained in Examples 1 to 3 and Comparative Examples 1 to 3 was uniformly dispersed. 30 g of Stoddard solvent (New Solvent F manufactured by Mitsubishi Oil Corporation), 2 g of liquid paraffin (Crompton), 1 g of castor oil, 0.5 g of polyoxyethylene sorbitan monooleate (Reodol TW-O106 manufactured by Kao Corporation) After mixing and emulsifying in the abrasive particle dispersion, 0.5 g of triethanolamine was added as an alkaline agent to increase the viscosity of the composition to obtain a polishing composition.
(2) Buffing test The surface of a black passenger bonnet (painted with a quick-drying urethane paint for repair) of an ordinary passenger car was lightly polished with water-resistant paper # 2000. Paper polishing marks are corrected using the polishing composition and sponge buff prepared in (1) above, the removal speed of paper eyes (paper scratches), the buff eyes after finishing (scratches due to buffs and compounds), The gloss was evaluated.
Buffing condition: Electric polisher (PE-2000 manufactured by Ryobi Corporation)
Polisher rotation speed: 1500rpm
Buff ... Sponge buff (Ishihara Yakuhin B-500)
Press load: 4kg
それぞれの評価結果を表１に表わす。
○・・・１０〜１５秒
△・・・１５〜２０秒
×・・・２０秒以上
仕上げ後のバフ目：目視評価
◎・・・全くない
○・・・目立たない
△・・・やや目立つ
×・・・よく目立つ
光沢：６０°鏡面光沢度計による評価
◎・・・９０以上
○・・・８５以上９０未満
△・・・７５以上８５未満
×・・・７５未満
Each evaluation result is shown in Table 1.
○ ... 10-15 seconds
△ ... 15-20 seconds
X: Buffing after finishing for 20 seconds or more: Visual evaluation
◎ ・ ・ ・ Nothing at all
○ ・ ・ ・ Inconspicuous
△ ... Slightly noticeable
× ・ ・ ・ Gloss which stands out well: Evaluation by 60 ° specular gloss meter
◎ ... 90 or more ○ ... 85 or more but less than 90
Δ: 75 to less than 85
× ・ ・ ・ less than 75
本発明の研磨用α−アルミナ組成物は、研磨速度に優れ、研磨キズが残らず、研磨後の仕上がりが良い研磨材として有用であるので、機械部品や電子部品の仕上げ等にも利用することが期待される。 The α-alumina composition for polishing according to the present invention is useful as a polishing material that is excellent in polishing rate, has no polishing scratches, and has a good finish after polishing. Therefore, it can also be used for finishing mechanical parts and electronic parts. There is expected.
Claims (5)
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| JP2008163154A (en) * | 2006-12-27 | 2008-07-17 | Kao Corp | Method for production of polishing liquid composition |
| JP2008255232A (en) * | 2007-04-05 | 2008-10-23 | Soft99 Corporation | Abrasive composition |
| JP2010163553A (en) * | 2009-01-16 | 2010-07-29 | Nicca Chemical Co Ltd | Abrasive composition and polishing method |
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| JP2008255232A (en) * | 2007-04-05 | 2008-10-23 | Soft99 Corporation | Abrasive composition |
| JP2010163553A (en) * | 2009-01-16 | 2010-07-29 | Nicca Chemical Co Ltd | Abrasive composition and polishing method |
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| JP2015120816A (en) * | 2013-12-24 | 2015-07-02 | 花王株式会社 | Polishing-liquid composition |
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