US2008081859A1PendingUtilityA1

Thermally Conductive Sheet And Method Of Production Thereof

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Assignee: YODA MASAKIPriority: Dec 3, 2004Filed: Oct 28, 2005Published: Apr 3, 2008
Est. expiryDec 3, 2024(expired)· nominal 20-yr term from priority
Inventors:Masaki YodaYoshinao Yamazaki
C08K 3/22C08K 5/372C08K 2003/2227Y10T156/10C08K 5/1345
48
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Claims

Abstract

There is provided a thermally conductive sheet containing: (A) a (meth)acrylic polymer, (B) a thermally conductive filler containing aluminum hydroxide, (C) a phenolic antioxidant, and (D) a sulfur based antioxidant. The thermally conductive sheet is a non-silicone (meth)acrylic polymer type thermally conductive sheet and has both high thermal conductivity and thermal stability.

Claims

exact text as granted — not AI-modified
1 - 7 . (canceled)  
     
     
         8 . A thermally conductive sheet comprising: 
 (A) a (meth)acrylic polymer,    (B) a thermally conductive filler containing aluminum hydroxide,    (C) a phenolic antioxidant, and    (D) a sulfur based antioxidant.    
     
     
         9 . A thermally conductive sheet according to  claim 8 , wherein the thermally conductive sheet contains 0.05 to 2 parts by weight of (C) a phenolic antioxidant with respect to 1100 parts by weight of (A) a (meth)acrylic polymer.  
     
     
         10 . A thermally conductive sheet according to  claim 9 , wherein the thermally conductive sheet contains 0.05 to 3 parts by weight of (D) a sulfur based antioxidant with respect to 100 parts by weight of (A) a (meth)acrylic polymer.  
     
     
         11 . thermally conductive sheet according to  claim 10 , wherein the thermally conductive sheet contains 10 to 75% by volume of aluminum hydroxide with respect to 100% by volume of thermally conductive sheet containing (A) a (meth)acrylic polymer, (B) a thermally conductive filler containing aluminum hydroxide, (C) a phenolic antioxidant, and (D) a sulfur based antioxidant.  
     
     
         12 . A thermally conductive sheet according to  claim 11  wherein the thermally conductive sheet contains at least 55% by volume of (B) a thermally conductive filler containing aluminum hydroxide with respect to 100% by volume of thermally conductive sheet containing (A) a (meth)acrylic polymer, (B) a thermally conductive filler containing aluminum hydroxide, (C) a phenolic antioxidant, and (D) a sulfur based antioxidant.  
     
     
         13 . A thermally conductive sheet according to  claim 9 , wherein the thermally conductive sheet contains 10 to 75% by volume of aluminum hydroxide with respect to 100% by volume of thermally conductive sheet containing (A) a (meth)acrylic polymer, (B) a thermally conductive filler containing aluminum hydroxide, (C) a phenolic antioxidant, and (D) a sulfur based antioxidant.  
     
     
         14 . A thermally conductive sheet according to  claim 13 , wherein the thermally conductive sheet contains at least 55% by volume of (B) a thermally conductive filler containing aluminum hydroxide with respect to 100% by volume of thermally conductive sheet containing (A) a (meth)acrylic polymer, (B) a thermally conductive filler containing aluminum hydroxide, (C) a phenolic antioxidant, and (D) a sulfur based antioxidant.  
     
     
         15 . A thermally conductive sheet according to  claim 8 , wherein the thermally conductive sheet contains 0.05 to 3 parts by weight of (D) a sulfur based antioxidant with respect to 100 parts by weight of (A) a (meth)acrylic polymer.  
     
     
         16 . A thermally conductive sheet according to  claim 8 , wherein the thermally conductive sheet contains 10 to 75% by volume of aluminum hydroxide with respect to 100% by volume of thermally conductive sheet containing (A) a (meth)acrylic polymer, (B) a thermally conductive filler containing aluminum hydroxide, (C) a phenolic antioxidant, and (D) a sulfur based antioxidant.  
     
     
         17 . A thermally conductive sheet according to  claim 8 , wherein the thermally conductive sheet contains at least 55% by volume of (B) a thermally conductive filler containing aluminum hydroxide with respect to 100% by volume of thermally conductive sheet containing (A) a (meth)acrylic polymer, (B) a thermally conductive filler containing aluminum hydroxide, (C) a phenolic antioxidant, and (D) a sulfur based antioxidant.  
     
     
         18 . A thermally conductive sheet according to  claim 8 , wherein the thermally conductive sheet is formed by curing a thermally conductive composition comprising: 
 (A′) a monomer component containing a (meth)acrylic monomer,    (B) a thermally conductive filler containing aluminum hydroxide,    (C) a phenolic antioxidant, and    (D) a sulfur based antioxidant.    
     
     
         19 . A thermally conductive sheet according to  claim 18  wherein the thermally conductive composition contains 0.05 to 2 parts by weight of (C) a phenolic antioxidant with respect to 100 parts by weight of (A′) a monomer component containing a (meth)acrylic monomer.  
     
     
         20 . A thermally conductive sheet according to  claim 19 , wherein the thermally conductive composition contains 0.05 to 3 parts by weight of (D) a sulfur based antioxidant with respect to 11000 parts by weight of (A′) a monomer component containing a (meth)acrylic monomer.  
     
     
         21 . A thermally conductive sheet according to  claim 20 , wherein the thermally conductive composition contains 10 to 75% by volume of aluminum hydroxide with respect to 100% by volume of thermally conductive composition containing (A′) a monomer component containing a (meth)acrylic monomer, (B) a thermally conductive filler containing aluminum hydroxide, (C) a phenolic antioxidant, and (D) a sulfur based antioxidant.  
     
     
         22 . A thermally conductive sheet according to  claim 21 , wherein the thermally conductive composition contains at least 55% by volume of (B) a thermally conductive filler containing aluminum hydroxide with respect to 100% by volume of thermally conductive composition containing (A′) a monomer component containing a (meth)acrylic monomer, (B) a thermally conductive filler containing aluminum hydroxide, (C) a phenolic antioxidant, and (D) a sulfur based antioxidant.  
     
     
         23 . A thermally conductive sheet according to  claim 19 , wherein the thermally conductive composition contains 10 to 75% by volume of aluminum hydroxide with respect to 100% by volume of thermally conductive composition containing (A) a (meth)acrylic polymer, (B) a thermally conductive filler containing aluminum hydroxide, (C) a phenolic antioxidant, and (D) a sulfur based antioxidant.  
     
     
         24 . A thermally conductive sheet according to  claim 18 , wherein the thermally conductive composition contains 0.05 to 3 parts by weight of (D) a sulfur based antioxidant with respect to 100 parts by weight of (A′) a monomer component containing a (meth)acrylic monomer.  
     
     
         25 . A thermally conductive sheet according to  claim 18  wherein the thermally conductive composition contains 10 to 75% by volume of aluminum hydroxide with respect to 100% by volume of thermally conductive composition containing (A′) a monomer component containing a (meth)acrylic monomer, (B) a thermally conductive filler containing aluminum hydroxide, (C) a phenolic antioxidant, and (D) a sulfur based antioxidant.  
     
     
         26 . A thermally conductive sheet according to  claim 18 , wherein the thermally conductive composition contains at least 55% by volume of (B) a thermally conductive filler containing aluminum hydroxide with respect to 100% by volume of thermally conductive composition containing (A′) a monomer component containing a (meth)acrylic monomer, (B) a thermally conductive filler containing aluminum hydroxide, (C) a phenolic antioxidant, and (D) a sulfur based antioxidant.  
     
     
         27 . A method of production of a thermally conductive sheet, comprising a step of curing a thermally conductive composition comprising: (A′) a monomer component containing a (meth)acrylic monomer, (B) a thermally conductive filler containing aluminum hydroxide, (C) a phenolic antioxidant, and (D) a sulfur based antioxidant.

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