JP5315477B1 - Silica particles, method for producing the same, and resin composition - Google Patents
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 239000011342 resin composition Substances 0.000 title claims description 19
- 239000002245 particle Substances 0.000 claims abstract description 60
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 59
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 57
- 239000010703 silicon Substances 0.000 claims abstract description 57
- 238000006243 chemical reaction Methods 0.000 claims abstract description 43
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 22
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000001301 oxygen Substances 0.000 claims abstract description 18
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 13
- 239000011574 phosphorus Substances 0.000 claims abstract description 13
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 8
- 239000000956 alloy Substances 0.000 claims abstract description 8
- 229910000765 intermetallic Inorganic materials 0.000 claims abstract description 8
- 239000011164 primary particle Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 13
- 239000000377 silicon dioxide Substances 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 5
- 230000002401 inhibitory effect Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 239000007787 solid Substances 0.000 description 7
- 239000000843 powder Substances 0.000 description 6
- 125000000524 functional group Chemical group 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 239000011863 silicon-based powder Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- -1 amic group Chemical group 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Chemical group 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 125000003566 oxetanyl group Chemical group 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000790 scattering method Methods 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/18—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
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Abstract
新規なシリカ粒子の製造方法を提供すること。
ケイ素含有粒子と酸素との反応でシリカ粒子を製造する際に、ケイ素元素よりも電子親和力が小さい金属元素を含有させることにより、ケイ素含有粒子と酸素との反応が抑制されるために反応時における温度上昇も抑制される。結果、シリカ粒子が形成されるときの反応条件が相対的に穏やかになることで生成したシリカ粒子の内部に空隙が形成されがたくなる。金属ケイ素を主成分とするケイ素含有粒子と酸素とを反応させて得られるシリカ粒子であって、前記ケイ素含有粒子は鉄元素、リン元素、及びアルミニウム元素からなる反応抑制元素を含有する合金又は金属間化合物であり、自身を構成する一次粒子の少なくとも一部はケイ素元素及び前記反応抑制元素の双方を含有することを特徴とする。To provide a novel method for producing silica particles.
When producing silica particles by reaction of silicon-containing particles and oxygen, by containing a metal element having an electron affinity smaller than that of silicon elements, the reaction between silicon-containing particles and oxygen is suppressed. Temperature rise is also suppressed. As a result, it is difficult for voids to be formed inside the silica particles produced by relatively mild reaction conditions when the silica particles are formed. Silica particles obtained by reacting silicon-containing particles containing metal silicon as a main component with oxygen, wherein the silicon-containing particles include an alloy or metal containing a reaction-inhibiting element composed of an iron element, a phosphorus element, and an aluminum element It is an intermetallic compound, and at least a part of primary particles constituting itself contains both silicon element and the reaction suppressing element.
Description
本発明は、シリカ粒子及びその製造方法、並びに樹脂組成物に関し、特に中実により近いシリカ粒子に関する。 The present invention relates to silica particles, a method for producing the same, and a resin composition, and particularly relates to silica particles closer to solid.
従来、熱硬化性樹脂などの樹脂中にシリカ粒子を含有させた樹脂組成物が知られている。樹脂中にシリカ粒子を含有・分散させることにより樹脂組成物に対して耐熱性を向上したり、物理的強度を向上したりできる。 Conventionally, a resin composition in which silica particles are contained in a resin such as a thermosetting resin is known. By including and dispersing silica particles in the resin, the heat resistance of the resin composition can be improved and the physical strength can be improved.
ところで、金属ケイ素粉末を酸素と反応させてシリカ粒子を製造する方法（ＶＭＣ法）が知られている。ＶＭＣ法によると比表面積が大きく且つアモルファス状のシリカを得ることができる。ＶＭＣ法は、酸素を含む雰囲気中でバーナーにより化学炎（天然ガスやプロパンガスなどの可燃性ガスを用いて形成できる）を形成し、この化学炎中に金属ケイ素粉末を粉塵雲が形成される程度の量投入し、爆燃を起こして球状の酸化物粒子を得る方法である。 By the way, a method of producing silica particles by reacting metal silicon powder with oxygen (VMC method) is known. According to the VMC method, amorphous silica having a large specific surface area can be obtained. In the VMC method, a chemical flame (which can be formed using a combustible gas such as natural gas or propane gas) is formed by a burner in an oxygen-containing atmosphere, and a dust cloud is formed of metal silicon powder in the chemical flame. This is a method in which a certain amount is added and deflagration is caused to obtain spherical oxide particles.
ここで、樹脂組成物中に分散させるシリカ粒子としては一次粒子の内部においても空隙が生じていないものを利用することが望ましい場合がある。中実な粒子は比重が大きくなり物理的特性も特有のものを持つことになる。ＶＭＣ法は爆発的な燃焼によりシリカを生成する方法であるため、急激な温度変化によって一次粒子内に空隙が生じることがある。 Here, as the silica particles dispersed in the resin composition, it may be desirable to use those in which no voids are formed even inside the primary particles. Solid particles have a higher specific gravity and specific physical properties. Since the VMC method is a method of generating silica by explosive combustion, voids may be generated in the primary particles due to a rapid temperature change.
本発明は上記実情に鑑み完成したものであり、新規なシリカ粒子とその製造方法並びにそのシリカ粒子を含有する樹脂組成物を提供することを解決すべき課題とする。 This invention is completed in view of the said situation, and makes it the problem which should be solved to provide the novel silica particle, its manufacturing method, and the resin composition containing the silica particle.
上記課題を解決する目的で本発明者らは鋭意検討を行った結果、金属ケイ素が主成分であるケイ素含有粒子と酸素との反応を利用してシリカ粒子を製造するＶＭＣ法において、ケイ素元素よりも電子親和力が小さい金属元素を合金又は金属間化合物として含有させることにより、ケイ素含有粒子と酸素との反応が、ケイ素元素のみからケイ素含有粒子が構成されているときと比べて抑制されるために反応時における温度上昇も抑制されることとなる。結果、シリカ粒子が形成されるときの反応条件が相対的に穏やかになることで生成したシリカ粒子の内部に空隙が形成されがたくなる（すなわち、中実な粒子に近くなる）ことを発見し、その知見に基づき以下の発明を完成した。なお、「金属ケイ素が主成分である」とは金属元素の含有量がケイ素含有粒子全体の質量を基準として５０％以上であるか、又は、後述する反応抑制元素以外の組成が不可避不純物を除いて金属ケイ素であることをいう。 In order to solve the above problems, the present inventors have conducted intensive studies. As a result, in the VMC method for producing silica particles by utilizing the reaction between silicon-containing particles containing metal silicon as a main component and oxygen, In addition, by containing a metal element having a small electron affinity as an alloy or an intermetallic compound, the reaction between the silicon-containing particles and oxygen is suppressed compared to the case where the silicon-containing particles are composed of only silicon elements. The temperature rise during the reaction is also suppressed. As a result, it was discovered that the reaction conditions when the silica particles are formed are relatively gentle, so that voids are less likely to be formed inside the generated silica particles (that is, close to solid particles). Based on the findings, the following invention has been completed. “Metal silicon is the main component” means that the content of the metal element is 50% or more based on the total mass of the silicon-containing particles, or the composition other than the reaction-suppressing element described later excludes inevitable impurities. It means metallic silicon.
（１）上記課題を解決するシリカ粒子は、金属ケイ素を主成分とするケイ素含有粒子と酸素とを反応させて得られるシリカ粒子であって、
前記ケイ素含有粒子は鉄元素及びリン元素のうちの少なくとも１つを含む反応抑制元素を含有し、得られるシリカ粒子全体の質量を基準として、鉄元素が０．０１％以上１．５％未満の範囲で含有するか、又はリン元素が０．０１％超０．０２６％未満の範囲で含有する合金又は金属間化合物であり、
自身を構成する一次粒子の少なくとも一部はケイ素元素及び前記反応抑制元素の双方を含有し、
球相当径が２０μｍ以上の粒子の質量が４．０×１０−６ ｍｇより大きいことを特徴とする。（２）（１）に記載のシリカ粒子は、前記ケイ素含有粒子が、得られるシリカ粒子全体の質量を基準として、鉄元素が０．０１％以上１．５％未満の範囲で含有する構成を採用できる。（３）上記課題を解決するシリカ粒子の製造方法は、金属ケイ素を主成分とするケイ素含有粒子と酸素とを反応させてシリカ粒子を製造する方法であって、
前記ケイ素含有粒子は鉄元素及びリン元素のうちの少なくとも１つを含む反応抑制元素を含有し、得られるシリカ粒子全体の質量を基準として、鉄元素が０．０１％以上１．５％未満の範囲で含有するか、又はリン元素が０．０１％超０．０２６％未満の範囲で含有する合金又は金属間化合物であり、
金属ケイ素と酸素とを反応させて得られたシリカ粒子は自身を構成する一次粒子の少なくとも一部はケイ素元素及び前記反応抑制元素の双方を含有し、球相当径が２０μｍ以上の粒子の質量が４．０×１０−６ ｍｇより大きいことを特徴とする。（４）上記課題を解決するシリカ含有樹脂組成物は、（１）又は（２）に記載のシリカ粒子と、前記シリカ粒子を分散する樹脂組成物とを有することを特徴とする。
(1) Silica particles that solve the above problems are silica particles obtained by reacting silicon-containing particles containing metal silicon as a main component with oxygen,
The silicon-containing particles contain a reaction-suppressing element containing at least one of iron element and phosphorus element, and the iron element content is 0.01% or more and less than 1.5% based on the total mass of the obtained silica particles. An alloy or an intermetallic compound containing in a range or containing phosphorus in a range of more than 0.01% and less than 0.026%,
At least a part of the primary particles constituting the self contains both the silicon element and the reaction suppressing element,
The mass of particles having a sphere equivalent diameter of 20 μm or more is larger than 4.0 × 10 −6 mg . (2) The silica particles according to (1) have a configuration in which the silicon-containing particles contain an iron element in a range of 0.01% or more and less than 1.5% based on the mass of the entire silica particles obtained. Can be adopted. (3) A method for producing silica particles that solves the above problems is a method for producing silica particles by reacting silicon-containing particles containing metal silicon as a main component with oxygen,
The silicon-containing particles contain a reaction-suppressing element containing at least one of iron element and phosphorus element, and the iron element content is 0.01% or more and less than 1.5% based on the total mass of the obtained silica particles. An alloy or an intermetallic compound containing in a range or containing phosphorus in a range of more than 0.01% and less than 0.026%,
Silica particles obtained by reacting metallic silicon with oxygen contain at least part of the primary particles constituting both the silicon element and the reaction-suppressing element, and the mass of particles having a sphere equivalent diameter of 20 μm or more. It is characterized by being larger than 4.0 × 10 −6 mg . (4) A silica-containing resin composition that solves the above problems includes the silica particles according to (1) or (2) and a resin composition in which the silica particles are dispersed.
本発明のシリカ粒子及びその製造方法は上記構成を有することにより、中実なシリカ粒子を提供することが可能になる。更には付随的な効果として、接触した物に対する付着性を低減することができる。 Since the silica particles and the method for producing the same of the present invention have the above configuration, solid silica particles can be provided. Furthermore, as an incidental effect, the adhesion to the contacted object can be reduced.
本発明のシリカ粒子及びその製造方法、並びに、シリカ含有樹脂組成物について実施形態に基づき以下詳細に説明を行う。 The silica particles of the present invention, the production method thereof, and the silica-containing resin composition will be described in detail below based on the embodiments.
（シリカ粒子）
本実施形態のシリカ粒子は金属ケイ素を主成分とするケイ素含有粒子と酸素とを反応させて得られるシリカ粒子である。この方法は前述したようにＶＭＣ法と称される方法であり、真球度が高い粒子を効率よく製造することができる方法である。ＶＭＣ法にて製造された直後において、製造されたシリカ粒子は粒径（球相当径）が２０μｍ以上の粒子の質量が４．０×１０−６ ｍｇより大きい。
(Silica particles)
The silica particles of the present embodiment are silica particles obtained by reacting silicon-containing particles containing metal silicon as a main component with oxygen. As described above, this method is called a VMC method, and can efficiently produce particles having a high sphericity. Immediately after being produced by the VMC method, the produced silica particles have a particle size (sphere equivalent diameter) of 20 μm or more and a mass of more than 4.0 × 10 −6 mg .
ケイ素含有粒子は金属ケイ素の他、反応抑制元素を含有する。反応抑制元素は鉄元素及びリン元素のうちの少なくとも１つを含む。反応抑制元素は、鉄元素が０．０１％以上１．５％未満の範囲で含有するか、又はリン元素が０．０１％超０．０２６％未満の範囲で含有する。併せて、アルミニウム元素を反応抑制元素に加えることも可能であり、その場合にシリカ粒子全体の質量を基準として０．０３％以上０．２４３％未満の範囲で含有することが好ましい。 The silicon-containing particles contain a reaction suppressing element in addition to metal silicon. The reaction suppressing element includes at least one of iron element and phosphorus element. The reaction suppressing element contains an iron element in a range of 0.01% or more and less than 1.5%, or a phosphorus element in a range of more than 0.01% and less than 0.026%. In addition, it is also possible to add an aluminum element to the reaction-suppressing element. In that case, it is preferable that the aluminum element is contained in a range of 0.03% or more and less than 0.243% based on the mass of the entire silica particles.
ケイ素元素と反応抑制元素とは合金乃至は金属間化合物として存在する。反応抑制元素とケイ素元素とが原子レベルで混合することにより、ケイ素と酸素との反応を抑制して穏やかな反応条件を実現することができる。 The silicon element and the reaction suppressing element exist as an alloy or an intermetallic compound. By mixing the reaction-suppressing element and the silicon element at the atomic level, it is possible to suppress the reaction between silicon and oxygen and realize mild reaction conditions.
反応抑制元素全体の和について、望ましい下限としては０．０５％、０．２％、０．４％が挙げられ、望ましい上限としては３％、１．３％が挙げられる。反応抑制元素はケイ素元素よりも電子親和力が小さい元素であり、特に鉄を含有させることが望ましい。反応抑制元素はケイ素元素と共に、生成したシリカ粒子を構成する一次粒子内に取り込まれる。生成したシリカ粒子中において、ケイ素元素と反応抑制元素とは原子レベルで混合するものである。 With respect to the sum of all reaction-suppressing elements, desirable lower limits include 0.05%, 0.2%, and 0.4%, and desirable upper limits include 3% and 1.3%. The reaction inhibiting element is an element having an electron affinity smaller than that of silicon element, and it is particularly desirable to contain iron. The reaction suppressing element is taken together with the silicon element into primary particles constituting the generated silica particles. In the produced silica particles, the silicon element and the reaction suppressing element are mixed at the atomic level.
本実施形態のシリカ粒子は体積平均粒径が０．１μｍから５μｍであることが望ましい。そして、最大粒径が２０μｍ以下であることが望ましく、更に小さな上限を設定することもできる。最大粒径の制御はＶＭＣ法の反応条件（ケイ素含有粒子と酸素と可燃性ガスとの混合比；ケイ素含有粒子の供給速度、供給量など）を変化させたり、ＶＭＣ法によりシリカ粒子を製造した後、必要な目開きをもつ篩によって篩分けすることも可能である。体積平均粒径の測定はレーザ散乱法にて測定したものである。体積平均粒径として好ましい下限としては０．２μｍ、０．３μｍ、０．４μｍが挙げられ、好ましい上限としては１．２μｍ、０．９μｍ、０．７μｍが挙げられる。 The silica particles of this embodiment preferably have a volume average particle size of 0.1 μm to 5 μm. The maximum particle size is desirably 20 μm or less, and a smaller upper limit can be set. The maximum particle size is controlled by changing the reaction conditions of the VMC method (mixing ratio of silicon-containing particles, oxygen and combustible gas; supply rate of silicon-containing particles, supply amount, etc.), or producing silica particles by the VMC method Later, it is also possible to screen with a sieve having the required openings. The volume average particle size is measured by a laser scattering method. Preferred lower limits for the volume average particle diameter include 0.2 μm, 0.3 μm, and 0.4 μm, and preferred upper limits include 1.2 μm, 0.9 μm, and 0.7 μm.
本実施形態のシリカ粒子は真球度が０．９以上であることが望ましく、０．９５以上であることが更に望ましい。真球度の測定は、ＳＥＭで写真を撮り、その観察される粒子の面積と周囲長から、（真球度）＝｛４π×（面積）÷（周囲長）２｝で算出される値として算出する。１に近づくほど真球に近い。具体的には画像処理装置（シスメックス株式会社：ＦＰＩＡ−３０００）を用い、無作為に抽出した１００個の粒子について測定した平均値を採用する。 The silica particles of the present embodiment preferably have a sphericity of 0.9 or more, and more preferably 0.95 or more. The sphericity is measured by taking a photograph with an SEM, and calculating the value of (sphericity) = {4π × (area) ÷ (perimeter) 2} from the area and circumference of the observed particle. calculate. The closer to 1, the closer to a true sphere. Specifically, an average value measured for 100 particles randomly extracted using an image processing apparatus (Sysmex Corporation: FPIA-3000) is employed.
（シリカ粒子の製造方法）
本実施形態のシリカ粒子の製造方法は上述した本実施形態のシリカ粒子を製造する方法である。本製造方法はケイ素含有粒子と酸素とを反応させることによりシリカ粒子を製造する。製造されたシリカ粒子は粒径（球相当径）が２０μｍ以上の粒子の質量が４．０×１０−６ ｍｇより大きい。この範囲にはいるようであると、そのシリカ粒子が中実に近いことが裏付けられる。
(Method for producing silica particles)
The manufacturing method of the silica particle of this embodiment is a method of manufacturing the silica particle of this embodiment mentioned above. This production method produces silica particles by reacting silicon-containing particles with oxygen. The produced silica particles have a particle size (equivalent sphere diameter) of 20 μm or more, and the mass of the particles is larger than 4.0 × 10 −6 mg . If it seems to be in this range, it is confirmed that the silica particles are almost solid.
ケイ素含有粒子は金属ケイ素を主成分とする他、反応抑制元素をケイ素との合金乃至は金属間化合物として含有している。ケイ素含有粒子における組成（不純物の量など）がそのまま製造されるシリカ粒子の組成に反映されるので必要な組成（純度など）になるように精製などを行う。 The silicon-containing particles contain metal silicon as a main component and also contain a reaction suppressing element as an alloy or intermetallic compound with silicon. Since the composition (such as the amount of impurities) in the silicon-containing particles is reflected as it is in the composition of the silica particles produced as it is, purification and the like are performed so that the necessary composition (such as purity) is obtained.
（シリカ含有樹脂組成物）
本実施形態のシリカ含有樹脂組成物は上述のシリカ粒子と樹脂組成物とを混合したものである。シリカ粒子と樹脂組成物との混合比は特に限定しないが、シリカ粒子の量が多い方が熱的安定性に優れたものになる。
(Silica-containing resin composition)
The silica-containing resin composition of the present embodiment is a mixture of the above-described silica particles and a resin composition. The mixing ratio of the silica particles and the resin composition is not particularly limited, but the larger the amount of silica particles, the better the thermal stability.
樹脂組成物は何らかの条件下で硬化可能な組成物である。例えば、プレポリマーと硬化剤との混合物である。硬化剤は硬貨直前に混合しても良い。樹脂組成物としてはその種類は特に限定しない。例えば、エポキシ基、オキセタン基、水酸基、ブロックされたイソシアネート基、アミノ基、ハーフエステル基、アミック基、カルボキシ基及び炭素-炭素二重結合基を化学構造中に有することが望ましい。これらの官能基は好適な反応条件を設定することで互いに結合可能な官能基（重合性官能基）であり、適正な反応条件を選択することにより樹脂組成物を硬化させることができる。硬化させるための好適な反応条件としては単純に加熱や光照射を行ったり、熱や光照射によりラジカルやイオン（アニオン、カチオン）などの反応性種を生成したり、それらの官能基間を結合する反応開始剤（重合開始剤）を添加して加熱や光照射を行うことなどである。重合反応に際して必要な化合物を硬化剤として添加したり、その反応に対する触媒を添加することもできる。 The resin composition is a composition that can be cured under some conditions. For example, a mixture of a prepolymer and a curing agent. The curing agent may be mixed immediately before the coin. The type of the resin composition is not particularly limited. For example, it is desirable to have an epoxy group, oxetane group, hydroxyl group, blocked isocyanate group, amino group, half ester group, amic group, carboxy group and carbon-carbon double bond group in the chemical structure. These functional groups are functional groups (polymerizable functional groups) that can be bonded to each other by setting suitable reaction conditions, and the resin composition can be cured by selecting appropriate reaction conditions. Suitable reaction conditions for curing include simple heating and light irradiation, generation of reactive species such as radicals and ions (anions and cations) by heat and light irradiation, and bonding between these functional groups. For example, adding a reaction initiator (polymerization initiator) to perform heating or light irradiation. A compound necessary for the polymerization reaction can be added as a curing agent, or a catalyst for the reaction can be added.
樹脂組成物としては重合により高分子材料を形成する単量体や、上述したような重合性官能基により修飾した高分子材料が好ましいものとして挙げられる。例えば、硬化前の、エポキシ樹脂、アクリル樹脂、ウレタン樹脂などのプレポリマーが好適である。特に熱的安定性の高いものにする場合にはエポキシ樹脂を主体として組成物を構成することが望ましい。 Preferred examples of the resin composition include a monomer that forms a polymer material by polymerization and a polymer material modified with a polymerizable functional group as described above. For example, a prepolymer such as an epoxy resin, an acrylic resin, or a urethane resin before curing is suitable. In particular, when the thermal stability is high, it is desirable that the composition is composed mainly of an epoxy resin.
本発明のシリカ粒子及びその製造方法について実施例に基づき詳細に説明を行う。 The silica particles of the present invention and the production method thereof will be described in detail based on examples.
・製造装置の説明
図１に本試験で用いた製造装置を示す。この製造装置は反応室１０をもつ反応容器１と、反応容器１の上部に設けられ反応室１０に開口する燃焼器２と、反応容器１０の下部側壁に設けられ反応室１０と連通する補修装置３と、ホッパー４と、ホッパー４内の原料粉末を燃焼器２に供給する粉末供給装置５とから構成される。
-Description of manufacturing apparatus The manufacturing apparatus used in this test is shown in FIG. This manufacturing apparatus includes a reaction vessel 1 having a
燃焼器２は、図２に拡大して示すように、軸中心に設けられ反応室１０に開口する粉末供給路２０と、粉末供給路２０と同軸的に設けられ反応室１０にリング状に開口する可燃ガス供給路２１と、可燃ガス供給路２１と同軸的且つ外側に設けられ反応室１０にリング状に開口する酸素供給路２２とから構成される。
As shown in an enlarged view in FIG. 2, the
捕集器３は、反応室１０に開口する排気管３０と、排気管３０の他端に接続されたバグフィルタ３１と、ブロア３２とからなり、ブロア３２の駆動により反応室１０内の燃焼排気ガスを吸引して排気すると共に、生成したシリカ粒子を捕集する。なお、ブロア３２の吸引により反応室１０内は負圧に保たれる。
The collector 3 includes an
・シリカ粒子の製造
上記した製造装置を用い、以下のように本実施例の製造方法によりシリカ粒子を製造した。ケイ素含有粒子としては得られるシリカ粒子全体の質量を基準として、鉄元素が４ｐｐｍ（試料１）、１３２ｐｐｍ（試料２）、１６００ｐｐｍ（試料３）、３２００ｐｐｍ（試料４）、１５０００ｐｐｍ（試料５）；リン元素が６ｐｐｍ（試料１）、１６ｐｐｍ（試料２）、１０５ｐｐｍ（試料３）、１２１ｐｐｍ（試料４）、２６０ｐｐｍ（試料５）；アルミニウム元素が１０２ｐｐｍ（試料１）、３９８ｐｐｍ（試料２）、１０５０ｐｐｍ（試料３）、１２１０ｐｐｍ（試料４）、２４３０ｐｐｍ（試料５）；反応抑制元素（鉄元素、リン元素、及びアルミニウム元素の和）が１１２ｐｐｍ（試料１）、５４６ｐｐｍ（試料２）、２７５５ｐｐｍ（試料３）、４５３１ｐｐｍ（試料４）、１７６９０ｐｐｍ（試料５）であるものをそれぞれ採用した。
-Manufacture of silica particles Silica particles were manufactured by the manufacturing method of a present Example as follows using the manufacturing apparatus mentioned above. As the silicon-containing particles, based on the mass of the entire silica particles obtained, iron element is 4 ppm (sample 1), 132 ppm (sample 2), 1600 ppm (sample 3), 3200 ppm (sample 4), 15000 ppm (sample 5); phosphorus Element 6 ppm (sample 1), 16 ppm (sample 2), 105 ppm (sample 3), 121 ppm (sample 4), 260 ppm (sample 5); Aluminum element 102 ppm (sample 1), 398 ppm (sample 2), 1050 ppm (sample) 3), 1210 ppm (sample 4), 2430 ppm (sample 5); reaction inhibitory elements (sum of iron element, phosphorus element, and aluminum element) are 112 ppm (sample 1), 546 ppm (sample 2), 2755 ppm (sample 3), What is 4531 ppm (sample 4), 17690 ppm (sample 5) It was adopted.
それぞれのケイ素含有粒子をホッパ４内に投入し、粉末供給装置５を用いて空気と共に反応室１０内に供給した。このときにケイ素含有粒子は８０ｋｇ／時間の速度で供給された。このときに搬送空気の供給速度としては２０Ｎｍ３／時間とした。また、可燃性ガスの供給速度は７Ｎｍ３／時間とした。また、酸素ガスの供給速度は１４０Ｎｍ３／時間とした。
Each silicon-containing particle was put into the hopper 4 and supplied into the
そして、可燃性ガスに着火して化学炎を形成している中に、粉末供給装置５により燃焼器２に到達したケイ素含有粒子は酸素ガスと連続的に反応し、爆発的に反応して火炎を形成した。結果、シリカ粒子が生成するので、補修装置３により回収した。
While the combustible gas is ignited to form a chemical flame, the silicon-containing particles that have reached the
得られたシリカ粒子のそれぞれについて、分級を行い、２０μｍ以上の粒子を得た。得られた粒子の質量を測定し、含まれる粒子の数で除することで粒子の粒１つ当たりの質量を求めた。その結果、試料１では１．６×１０−６ｍｇ、試料２では４．２×１０−６ｍｇ、試料３では７．８×１０−６ｍｇ、試料４では９．７×１０−６ｍｇ、試料５では２．５×１０−５ｍｇであった。つまり、鉄などの反応抑制元素の含有量が多くなるにつれて１個あたりの質量が大きくなった。これは反応抑制元素を含有させることにより、得られるシリカ粒子が中実に近づいたために、粒子１個あたりの質量が大きくなったものと思われる。また、鉄元素の含有量が大きくなるほど、ケイ素含有粒子及び得られたシリカ粒子の設備（搬送路など）への付着が抑制できることを確認した。
Each of the obtained silica particles was classified to obtain particles of 20 μm or more. The mass of the obtained particles was measured and divided by the number of contained particles to determine the mass per particle of the particles. As a result, 1.6 × 10 −6 mg for sample 1, 4.2 × 10 −6 mg for
本発明のシリカ粒子及びその製造方法は中実なシリカ粒子を提供することが可能になる。更には付随的な効果として、接触した物に対する付着性を低減することができる。 The silica particles and the production method thereof of the present invention can provide solid silica particles. Furthermore, as an incidental effect, the adhesion to the contacted object can be reduced.
Claims (4)
前記ケイ素含有粒子は鉄元素及びリン元素のうちの少なくとも１つを含む反応抑制元素を含有し、得られるシリカ粒子全体の質量を基準として、鉄元素を０．０１％以上１．５％未満の範囲で含有するか、又はリン元素を０．０１％超０．０２６％未満の範囲で含有する合金又は金属間化合物であり、
自身を構成する一次粒子の少なくとも一部はケイ素元素及び前記反応抑制元素の双方を含有し、
球相当径が２０μｍ以上の粒子の質量が４．０×１０−６ｍｇより大きいことを特徴とするシリカ粒子。 Silica particles obtained by reacting silicon-containing particles containing metal silicon as a main component with oxygen,
The silicon-containing particles contain inhibiter element comprising at least one of the iron element and phosphorus element, based on the weight of the entire resulting silica particles, the elemental iron less than 1.5% or more 0.01% An alloy or an intermetallic compound containing in a range or containing phosphorus element in a range of more than 0.01% and less than 0.026%,
At least a part of the primary particles constituting the self contains both the silicon element and the reaction suppressing element,
Silica particles, wherein the mass of particles having a sphere equivalent diameter of 20 μm or more is greater than 4.0 × 10 −6 mg.
前記ケイ素含有粒子は鉄元素及びリン元素のうちの少なくとも１つを含む反応抑制元素を含有し、得られるシリカ粒子全体の質量を基準として、鉄元素を０．０１％以上１．５％未満の範囲で含有するか、又はリン元素を０．０１％超０．０２６％未満の範囲で含有する合金又は金属間化合物であり、
金属ケイ素と酸素とを反応させて得られたシリカ粒子は自身を構成する一次粒子の少なくとも一部はケイ素元素及び前記反応抑制元素の双方を含有し、球相当径が２０μｍ以上の粒子の質量が４．０×１０−６ｍｇより大きいことを特徴とするシリカ粒子の製造方法。 A method of producing silica particles by reacting silicon-containing particles containing metal silicon as a main component and oxygen,
The silicon-containing particles contain inhibiter element comprising at least one of the iron element and phosphorus element, based on the weight of the entire resulting silica particles, the elemental iron less than 1.5% or more 0.01% An alloy or an intermetallic compound containing in a range or containing phosphorus element in a range of more than 0.01% and less than 0.026%,
Silica particles obtained by reacting metallic silicon with oxygen contain at least part of the primary particles constituting both the silicon element and the reaction-suppressing element, and the mass of particles having a sphere equivalent diameter of 20 μm or more. The manufacturing method of the silica particle characterized by being larger than 4.0 * 10 <-6> mg.
前記シリカ粒子を分散する樹脂組成物と、
を有することを特徴とするシリカ含有樹脂組成物。 Silica particles according to claim 1 or 2,
A resin composition in which the silica particles are dispersed;
A silica-containing resin composition characterized by comprising:
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