Exhaust pipe paint and exhaust pipe

Abstract

An exhaust pipe paint includes an inorganic particle, at least one of an inorganic binder and an inorganic binder precursor, and an inorganic glass particle. The inorganic glass particle includes a low-melting glass having a softening temperature lower than a softening temperature of the inorganic binder. The low-melting glass includes at least one of soda-lime glass, alkali-free glass, borosilicate glass, potash glass, lead crystal glass, barium glass, boron glass, strontium glass, alumina silica glass, soda zinc glass, and soda barium glass.

1 . An exhaust pipe paint comprising:
 an inorganic particle;   at least one of an inorganic binder and an inorganic binder precursor; and   an inorganic glass particle comprising a low-melting glass having a softening temperature lower than a softening temperature of said inorganic binder, said low-melting glass comprising:
 at least one of soda-lime glass, alkali-free glass, borosilicate glass, potash glass, lead crystal glass, barium glass, boron glass, strontium glass, alumina silica glass, soda zinc glass, and soda barium glass. 
   
     
     
         2 . The exhaust pipe paint according to  claim 1 ,
 wherein said low-melting glass has a softening temperature of about 300° C. to about 1000° C.   
     
     
         3 . The exhaust pipe paint according to  claim 1 ,
 wherein the exhaust pipe paint has an emissivity of about 0.7 or more after a drying treatment.   
     
     
         4 . The exhaust pipe paint according to  claim 1 ,
 wherein said inorganic particle comprises at least one oxide of manganese, iron, copper, cobalt, and chromium.   
     
     
         5 . The exhaust pipe paint according to  claim 1 ,
 wherein a softening temperature of said inorganic binder is in excess of about 1000° C. and is higher than a softening temperature of a low-melting glass.   
     
     
         6 . The exhaust pipe paint according to  claim 1 ,
 wherein said inorganic binder comprises lithium oxide particles or an inorganic binder derived from said inorganic binder precursor, said inorganic binder precursor including lithium alkoxide.   
     
     
         7 . The exhaust pipe paint according to  claim 1 ,
 wherein said low-melting glass is SiO 2 —B 2 O 3 —ZnO type glass, SiO 2 —B 2 O 3 —Bi 2 O 3  type glass, SiO 2 —PbO type glass, SiO 2 —PbO—B 2 O 3  type glass, SiO 2 —B 2 O 3 —PbO type glass, B 2 O 3 —ZnO—PbO type glass, B 2 O 3 —ZnO—Bi 2 O 3  type glass, B 2 O 3 —Bi 2 O 3  type glass, B 2 O 3 —ZnO type glass, or BaO—SiO 2  type glass.   
     
     
         8 . The exhaust pipe paint according to  claim 1 ,
 wherein the exhaust pipe paint after a drying treatment has a thermal conductivity lower than the thermal conductivity of said exhaust pipe base.   
     
     
         9 . The exhaust pipe paint according to  claim 1 ,
 wherein a difference between a coefficient of thermal expansion of the exhaust pipe paint after a drying treatment and a coefficient of thermal expansion of said exhaust pipe base is about 10×10 −6 /° C. or less.   
     
     
         10 . An exhaust pipe comprising:
 an exhaust pipe base; and   a surface coat layer provided on said exhaust pipe base by heating an exhaust pipe paint applied to said exhaust pipe base, the exhaust pipe paint comprising:
 an inorganic particle; 
 at least one of an inorganic binder and an inorganic binder precursor; and 
 an inorganic glass particle comprising a low-melting glass having a softening temperature lower than a softening temperature of said inorganic binder, said low-melting glass comprising:
 at least one of soda-lime glass, 
 
   alkali-free glass, borosilicate glass, potash glass, lead crystal glass, barium glass, boron glass, strontium glass, alumina silica glass, soda zinc glass, and soda barium glass.   
     
     
         11 . The exhaust pipe according to  claim 10 ,
 wherein said low-melting glass has a softening temperature of about 300° C. to about 1000° C.   
     
     
         12 . The exhaust pipe according to  claim 10 ,
 wherein the exhaust pipe paint has an emissivity of about 0.7 or more after a drying treatment.   
     
     
         13 . The exhaust pipe according to  claim 10 ,
 wherein said inorganic particle comprises at least one oxide of manganese, iron, copper, cobalt, and chromium.   
     
     
         14 . The exhaust pipe according to  claim 10 ,
 wherein a softening temperature of said inorganic binder is in excess of about 1000° C. and is higher than a softening temperature of a low-melting glass.   
     
     
         15 . The exhaust pipe according to  claim 10 ,
 wherein said inorganic binder comprises lithium oxide particles or an inorganic binder derived from said inorganic binder precursor, said inorganic binder precursor including lithium alkoxide.   
     
     
         16 . The exhaust pipe according to  claim 10 ,
 wherein said low-melting glass is SiO 2 —B 2 O 3 —ZnO type glass, SiO 2 —B 2 O 3 —Bi 2 O 3  type glass, SiO 2 —PbO type glass, SiO 2 —PbO—B 2 O 3  type glass, SiO 2 —B 2 O 3 —PbO type glass, B 2 O 3 —ZnO—PbO type glass, B 2 O 3 —ZnO—Bi 2 O 3  type glass, B 2 O 3 —Bi 2 O 3  type glass, B 2 O 3 —ZnO type glass, or BaO—SiO 2  type glass.   
     
     
         17 . The exhaust pipe according to  claim 10 ,
 wherein the exhaust pipe paint after a drying treatment has a thermal conductivity lower than the thermal conductivity of said exhaust pipe base.   
     
     
         18 . The exhaust pipe according to  claim 10 ,
 wherein a difference between a coefficient of thermal expansion of the exhaust pipe paint after a drying treatment and a coefficient of thermal expansion of said exhaust pipe base is about 10×10 −6 /° C. or less.