Heat-transmitting modifier for elastomer, heat-transmission-modified crystalline elastomer, method for using crystalline polymer and precursor thereof, method for heat-transmission modification of elastomer, heater body, and heated body

Abstract

The present invention brings about an increase in the thermal conductivity of an elastomer molded article over a preexisting value. The method according to the present invention is a method that uses at least one of a liquid crystalline polymer and a precursor therefor as a thermal conductivity modifier for an elastomer. That is, the thermal conductivity modifier for an elastomer according to the present invention contains at least one of a liquid crystalline polymer and a precursor therefor. The thermal conductivity modifier may contain only at least one of a liquid crystalline polymer and a precursor therefor or may contain at least one of a liquid crystalline polymer and a precursor therefor along with an additional component. The method and thermal conductivity modifier according to the present invention can bring about an increase in the thermal conductivity of an elastomer molded article over a preexisting value.

What is claimed is: 
     
         1 . A method of modifying the thermal conductivity of an polysiloxane-based elastomer by introducing at least one mesogenic group selected from the group consisting of (4-methoxyphenyl)-4-pent-4-enoxybenzoate, (4-cyanophenyl)-4-pent-4-enoxybenzoate, 4-cyano-4′-pent-4-enoxy-1,1′-biphenyl, (4-nitrophenyl)-4-pent-4-enoxybenzoate, 4-biphenyl-4-pent-4-enoxybenzoate, and 4′-cyano-4-biphenyl-4-pent-4-enoxybenzoate as a side chain into the polysiloxane-based elastomer with a functional group. 
     
     
         2 . A method of modifying the thermal conductivity of an elastomer by adding the polysiloxane-based elastomer modified by the method according to  claim 1  to the elastomer. 
     
     
         3 . A heater body comprising:
 a heating part; and   an elastic part that is formed from the siloxane-based elastomer modified by the method according to  claim 1  and that is provided on at least a portion of the heating part.   
     
     
         4 . The heater body according to  claim 3 , wherein
 the heating part is a heating layer,   the elastic part is an elastic layer, and   the heater body is a seamless heating composite tubular article.   
     
     
         5 . The heater body according to  claim 4 , wherein
 the heating layer is an induction heating layer, and   the seamless heating composite tubular article is a seamless induction-heating composite tubular article.   
     
     
         6 . The heater body according to  claim 3 , wherein the elastic layer has a JIS-A hardness within a range of at least 3 degrees and not more than 50 degrees. 
     
     
         7 . A heater body comprising:
 a heating part; and   an elastic part that is formed from the elastomer modified by the method according to  claim 2  and that is provided on at least a portion of the heating part.   
     
     
         8 . The heater body according to  claim 7 , wherein
 the heating part is a heating layer,   the elastic part is an elastic layer, and   the heater body is a seamless heating composite tubular article.   
     
     
         9 . The heater body according to  claim 8 , wherein
 the heating layer is an induction heating layer, and   the seamless heating composite tubular article is a seamless induction-heating composite tubular article.   
     
     
         10 . The heater body according to  claim 7 , wherein the elastic layer has a JIS-A hardness within a range of at least 3 degrees and not more than 50 degrees. 
     
     
         11 . A heated body comprising:
 a base part; and   an elastic part that is formed from the siloxane-based elastomer modified by the method according to  claim 1  and that is provided on at least a portion of the base part.   
     
     
         12 . The heated body according to  claim 11 , wherein
 the base part is a base layer,   the elastic part is an elastic layer, and   the heated body is a seamless composite tubular article.   
     
     
         13 . The heated body according to  claim 11 , wherein the elastic layer has a JIS-A hardness within a range of at least 3 degrees and not more than 50 degrees. 
     
     
         14 . A heated body comprising:
 a base part; and   an elastic part that is formed from the elastomer modified by the method according to  claim 2  and that is provided on at least a portion of the base part.   
     
     
         15 . The heated body according to  claim 14 , wherein
 the base part is a base layer,   the elastic part is an elastic layer, and   the heated body is a seamless composite tubular article.   
     
     
         16 . The heated body according to  claim 14 , wherein the elastic layer has a JIS-A hardness within a range of at least 3 degrees and not more than 50 degrees. 
     
     
         17 . A liquid crystalline elastomer having a thermal conductivity of at least 0.21 W/m·K. 
     
     
         18 . The liquid crystalline elastomer according to  claim 17 , wherein the liquid crystalline elastomer has a JIS-A hardness within a range of at least 3 degrees and not more than 50 degrees. 
     
     
         19 . The liquid crystalline elastomer according to  claim 17 , wherein a main chain of the liquid crystalline elastomer consists of a polysiloxane-based polymer, and the liquid crystalline elastomer has at least one mesogenic group selected form the group consisting of (4-methoxyphenyl)-4-pent-4-enoxybenzoate, (4-cyanophenyl)-4-pent-4-enoxybenzoate, 4-cyano-4′-pent-4-enoxy-1,1′-biphenyl, (4-nitrophenyl)-4-pent-4-enoxybenzoate, 4-biphenyl-4-pent-4-enoxybenzoate, and 4′-cyano-4-biphenyl-4-pent-4-enoxybenzoate as a side chain. 
     
     
         20 . A liquid crystalline elastomer,
 a polysiloxane-based polymer as a main chain; and   at least one mesogenic group selected form the group consisting of (4-methoxyphenyl)-4-pent-4-enoxybenzoate, (4-cyanophenyl)-4-pent-4-enoxybenzoate, 4-cyano-4′-pent-4-enoxy-1,1′-biphenyl, (4-nitrophenyl)-4-pent-4-enoxybenzoate, 4-biphenyl-4-pent-4-enoxybenzoate, and 4′-cyano-4-biphenyl-4-pent-4-enoxybenzoate as a side chain.