US2010093909A1PendingUtilityA1

Roundish fused alumina particles, production process thereof, and resin composition containing the particles

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Assignee: SHOWA DENKO KKPriority: Mar 15, 2004Filed: Dec 11, 2009Published: Apr 15, 2010
Est. expiryMar 15, 2024(expired)· nominal 20-yr term from priority
Inventors:Hirokazu MiyazawaShinichiro Tomikawa
C01P 2004/60C01P 2004/32C01F 7/023C01P 2006/32C01F 7/027C01P 2004/30C01F 7/02C01P 2004/61C08K 3/22Y10T428/2982C01F 7/00C08K 3/00
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Claims

Abstract

A roundish fused alumina particles having a mean particle size of 5 to 4,000 μm and a roundness of 0.85 or more, and a producing method thereof are provided. The method comprises removing edges of fused alumina particles by making the fused alumina particles collide with each other.

Claims

exact text as granted — not AI-modified
1 . Roundish fused alumina particles having a mean particle size of 5 to 4,000 μm and a roundness of 0.85 or more. 
   
   
       2 . The roundish fused alumina particles according to  claim 1 , wherein the alumina particles are virtually formed of single crystals. 
   
   
       3 . The roundish fused alumina particles according to  claim 1 , wherein the alumina particles have a mean particle size of 5 to 500 μm. 
   
   
       4 . The roundish fused alumina particles according to  claim 1 , wherein the alumina particles have a roundness of 0.88 or more. 
   
   
       5 . A wear-resistant resin composition, characterized in that the resin composition contains the roundish fused alumina particles according to  claim 1 . 
   
   
       6 . A high-thermal-conductivity rubber composition, characterized in that the rubber composition contains the roundish fused alumina particles according to  claim 1 . 
   
   
       7 . A high-thermal-conductivity resin composition, characterized in that the resin composition contains the roundish fused alumina particles according to  claim 1 . 
   
   
       8 . A method for producing a wear-resistant resin composition, characterized by using the roundish fused alumina particles according to  claim 1 . 
   
   
       9 . A method for producing a high-thermal-conductivity rubber composition, characterized by using the roundish fused alumina particles according to  claim 1 . 
   
   
       10 . A method for producing a high-thermal-conductivity resin composition, characterized by using the roundish fused alumina particles according to  claim 1 .

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