JP2017504177A5

JP2017504177A5 -

Info

Publication number: JP2017504177A5
Application number: JP2016519996A
Authority: JP
Filing date: 2014-10-06
Publication date: 2017-08-31
Anticipated expiration: 2034-10-06

Description

この成形品の横断面を電子顕微鏡で観察したとき、黒鉛含有複合物４１とその表面をコートする絶縁層４２とを含有する熱伝導性粒子が図４に示されるように観察された。さらに、熱伝導性粒子は樹脂４３内でほとんど平行に整列された。
以下、本明細書に記載の主な発明について列記する。
（１）複合コアと、
絶縁層とを含む熱伝導性粒子であって、
前記複合コアが複数のコア粒子と前記コア粒子を一緒に結合する有機バインダーとを含み、
前記コア粒子が熱伝導性であり、金属粒子、セラミック粒子、炭素をベースとする粒子、およびこれらの混合物からなる群から選択され、
絶縁材料が前記複合コアの少なくとも一部をコートし、
前記熱伝導性粒子が、１０ｍｍの直径および３．０ｍｍの高さを有する前記熱伝導性粒子のシリンダー上で５００Ｖの印加電圧で測定された時に、少なくとも１×１０⁴Ω・ｃｍ〜１×１０¹⁰Ω・ｃｍの範囲である体積抵抗率を示す、熱伝導性粒子。
（２）前記コア粒子が炭素をベースとする粒子である、（１）に記載の熱伝導性粒子。
（３）前記炭素をベースとする粒子が黒鉛である、（１）に記載の熱伝導性粒子。
（４）前記コア粒子が、３：２〜９９：１の比の天然黒鉛およびフレーク状の炭素をベースとする粒子であり、
前記フレーク状の炭素をベースとする粒子が、前記天然黒鉛の平均厚さよりも小さい平均厚さを有する、（１）または（２）に記載の熱伝導性粒子。
（５）前記コア粒子が１００体積部であり、
前記有機バインダーが前記コア粒子の体積の３〜２５体積部の範囲であり、前記絶縁材料が前記コア粒子の４〜４８体積部の範囲である、（１）または（２）に記載の熱伝導性粒子。
（６）前記コア粒子が、３：２〜９９：１の比の天然黒鉛およびフレーク状の炭素をベースとする粒子であり、
前記フレーク状の炭素をベースとする粒子が、前記天然黒鉛の平均厚さよりも小さい平均厚さを有する、（５）に記載の熱伝導性粒子。
（７）前記有機バインダーが熱硬化性樹脂である、（１）または（２）に記載の熱伝導性粒子。
（８）前記有機バインダーが熱硬化性樹脂である、（６）に記載の熱伝導性粒子。
（９）前記熱伝導性粒子の平均粒径が０．５μｍ〜３００μｍの範囲である、（１）または（２）に記載の熱伝導性粒子。
（１０）前記熱伝導性粒子の平均粒径が０．５μｍ〜３００μｍの範囲である、（８）に記載の熱伝導性粒子。
（１１）前記絶縁材料が、セリサイト、ベーマイト、タルク、マイカ、およびこれらの混合物からなる群から選択される、（１）または（２）に記載の熱伝導性粒子。
（１２）前記絶縁材料が、セリサイト、ベーマイト、タルク、マイカ、およびこれらの混合物からなる群から選択される、（１０）に記載の熱伝導性粒子。
（１３）複合コアを絶縁材料で少なくとも部分的にコートする工程を含む熱伝導性粒子を製造する方法であって、
前記複合コアが、複数のコア粒子と前記コア粒子を一緒に結合する有機バインダーとを含み、
前記コア粒子が熱伝導性であり、金属粒子、セラミック粒子、炭素をベースとする粒子、およびこれらの混合物からなる群から選択され、
前記絶縁材料が、セリサイト、ベーマイト、タルク、マイカ、およびこれらの混合物からなる群から選択され、
前記熱伝導性粒子が、１０ｍｍの直径および３．０ｍｍの高さを有する前記熱伝導性粒子のシリンダー上で５００Ｖの印加電圧で測定された時に、少なくとも１×１０⁴Ω・ｃｍ〜１×１０¹⁰Ω・ｃｍの範囲である体積抵抗率を示す、方法。
（１４）前記複合コアが、圧縮力および剪断力を適用して前記コア粒子を前記有機バインダーと混合させることによって形成される、（１３）に記載の方法。
（１５）熱伝導性粒子と、
からなる群から選択される樹脂とを含む樹脂組成物であって、
前記熱伝導性粒子が複合コアと絶縁層とを含み、
前記複合コアが複数のコア粒子と前記コア粒子を一緒に結合する有機バインダーとを含み、
前記コア粒子が熱伝導性であり、金属粒子、セラミック粒子、炭素をベースとする粒子、およびこれらの混合物からなる群から選択され、
絶縁材料が前記複合コアの少なくとも一部をコートし、
前記熱伝導性粒子が、１０ｍｍの直径および３．０ｍｍの高さを有する前記熱伝導性粒子のシリンダー上で５００Ｖの印加電圧で測定された時に、少なくとも１×１０⁴Ω・ｃｍ〜１×１０¹⁰Ω・ｃｍの範囲である体積抵抗率を示し、
前記熱伝導性粒子が、樹脂組成物の全体積の１０〜７０体積％の範囲である、樹脂組成物。
When the cross section of this molded product was observed with an electron microscope, thermally conductive particles containing the graphite-containing composite 41 and the insulating layer 42 coating the surface thereof were observed as shown in FIG. Furthermore, the thermally conductive particles were aligned almost parallel in the resin 43.
The main inventions described in this specification are listed below.
(1) a composite core;
A thermally conductive particle comprising an insulating layer,
The composite core includes a plurality of core particles and an organic binder that binds the core particles together;
The core particles are thermally conductive and are selected from the group consisting of metal particles, ceramic particles, carbon-based particles, and mixtures thereof;
An insulating material coats at least a portion of the composite core;
When the thermally conductive particles are measured at an applied voltage of 500 V on a cylinder of the thermally conductive particles having a diameter of 10 mm and a height of 3.0 mm, at least 1 × 10 ⁴ Ω · cm to 1 × 10 ⁶ Thermally conductive particles exhibiting a volume resistivity in the range of ¹⁰ Ω · cm.
(2) The thermally conductive particle according to (1), wherein the core particle is a carbon-based particle.
(3) The thermally conductive particles according to (1), wherein the carbon-based particles are graphite.
(4) the core particles are particles based on natural graphite and flaky carbon in a ratio of 3: 2 to 99: 1;
The thermally conductive particles according to (1) or (2), wherein the flaky carbon-based particles have an average thickness smaller than an average thickness of the natural graphite.
(5) The core particle is 100 parts by volume,
The heat conduction according to (1) or (2), wherein the organic binder is in the range of 3 to 25 parts by volume of the core particles, and the insulating material is in the range of 4 to 48 parts by volume of the core particles. Sex particles.
(6) the core particles are particles based on natural graphite and flaky carbon in a ratio of 3: 2 to 99: 1;
The thermally conductive particles according to (5), wherein the flaky carbon-based particles have an average thickness smaller than the average thickness of the natural graphite.
(7) The thermally conductive particles according to (1) or (2), wherein the organic binder is a thermosetting resin.
(8) The thermally conductive particles according to (6), wherein the organic binder is a thermosetting resin.
(9) The thermally conductive particles according to (1) or (2), wherein the average particle diameter of the thermally conductive particles is in the range of 0.5 μm to 300 μm.
(10) The thermally conductive particles according to (8), wherein the average particle diameter of the thermally conductive particles is in the range of 0.5 μm to 300 μm.
(11) The thermally conductive particles according to (1) or (2), wherein the insulating material is selected from the group consisting of sericite, boehmite, talc, mica, and a mixture thereof.
(12) The thermally conductive particles according to (10), wherein the insulating material is selected from the group consisting of sericite, boehmite, talc, mica, and a mixture thereof.
(13) A method of producing thermally conductive particles comprising the step of at least partially coating a composite core with an insulating material,
The composite core includes a plurality of core particles and an organic binder that binds the core particles together;
The core particles are thermally conductive and are selected from the group consisting of metal particles, ceramic particles, carbon-based particles, and mixtures thereof;
The insulating material is selected from the group consisting of sericite, boehmite, talc, mica, and mixtures thereof;
When the thermally conductive particles are measured at an applied voltage of 500 V on a cylinder of the thermally conductive particles having a diameter of 10 mm and a height of 3.0 mm, at least 1 × 10 ⁴ Ω · cm to 1 × 10 ⁶ ^A method of indicating a volume resistivity in the range of ¹⁰ Ω · cm.
(14) The method according to (13), wherein the composite core is formed by applying a compressive force and a shearing force to mix the core particles with the organic binder.
(15) thermally conductive particles;
A resin composition comprising a resin selected from the group consisting of:
The thermally conductive particles include a composite core and an insulating layer;
The composite core includes a plurality of core particles and an organic binder that binds the core particles together;
The core particles are thermally conductive and are selected from the group consisting of metal particles, ceramic particles, carbon-based particles, and mixtures thereof;
An insulating material coats at least a portion of the composite core;
When the thermally conductive particles are measured at an applied voltage of 500 V on a cylinder of the thermally conductive particles having a diameter of 10 mm and a height of 3.0 mm, at least 1 × 10 ⁴ Ω · cm to 1 × 10 ⁶ Shows volume resistivity in the range of ¹⁰ Ω · cm,
The resin composition, wherein the thermally conductive particles are in the range of 10 to 70% by volume of the total volume of the resin composition.

Claims

A composite core,
A thermally conductive particle comprising an insulating layer,
The composite core includes a plurality of core particles and an organic binder that binds the core particles together;
The core particles are thermally conductive and are selected from the group consisting of metal particles, ceramic particles, carbon-based particles, and mixtures thereof;
An insulating material coats at least a portion of the composite core;
When the thermally conductive particles are measured at an applied voltage of 500 V on a cylinder of the thermally conductive particles having a diameter of 10 mm and a height of 3.0 mm, at least 1 × 10 ⁴ Ω · cm to 1 × 10 ⁶ Thermally conductive particles exhibiting a volume resistivity in the range of ¹⁰ Ω · cm.

A method of producing thermally conductive particles comprising the step of at least partially coating a composite core with an insulating material comprising:
The composite core includes a plurality of core particles and an organic binder that binds the core particles together;
The core particles are thermally conductive and are selected from the group consisting of metal particles, ceramic particles, carbon-based particles, and mixtures thereof;
The insulating material is selected from the group consisting of sericite, boehmite, talc, mica, and mixtures thereof;
When the thermally conductive particles are measured at an applied voltage of 500 V on a cylinder of the thermally conductive particles having a diameter of 10 mm and a height of 3.0 mm, at least 1 × 10 ⁴ Ω · cm to 1 × 10 ⁶ ^A method of indicating a volume resistivity in the range of ¹⁰ Ω · cm.

Thermally conductive particles;
A resin composition comprising a resin selected from the group consisting of:
The thermally conductive particles include a composite core and an insulating layer;
The composite core includes a plurality of core particles and an organic binder that binds the core particles together;
The core particles are thermally conductive and are selected from the group consisting of metal particles, ceramic particles, carbon-based particles, and mixtures thereof;
An insulating material coats at least a portion of the composite core;
When the thermally conductive particles are measured at an applied voltage of 500 V on a cylinder of the thermally conductive particles having a diameter of 10 mm and a height of 3.0 mm, at least 1 × 10 ⁴ Ω · cm to 1 × 10 ⁶ Shows volume resistivity in the range of ¹⁰ Ω · cm,
The resin composition, wherein the thermally conductive particles are in the range of 10 to 70% by volume of the total volume of the resin composition.