Surface protection composition and terminal fitted electric wire

Abstract

A surface protection composition stably protecting a metal surface even at a high temperature, and a terminal-fitted electric wire improved in anticorrosion property by using the composition. The surface protection composition contains a high-consistency material (A) containing a lubricant base oil and an amide compound, and a composition (B) containing a phosphorus compound containing one or more compounds represented by the general formulae (1) and (2) and a metal. The mass ratio (A):(B) of the high-consistency material (A) to the composition (B) is within a range of 50:50 to 98:2. The lubricant base oil has a kinematic viscosity of 10 mm 2 /s or higher at 100° C. and a number-average molecular weight of 400 or higher:

1 . A surface protection composition comprising:
 a high-consistency material (A) comprising:
 a lubricant base oil; and an 
 amide compound; and 
   a composition (B) containing:
 a phosphorus compound comprising:
 one or more selected from compounds represented by the general formulae (1) and (2); and 
 
 a metal, 
   a mass ratio (A):(B) of the high-consistency material (A) to the composition (B) being within a range of 50:50 to 98:2, the lubricant base oil having a kinematic viscosity within a range of 100 to 150 mm 2 /s at 100° C. and the number-average molecular weight of 400 or higher:   
       
         
           
           
               
               
           
         
         where X 1  to X 7  each represent independently an oxygen atom or a sulfur atom, R 11  to R 13  each represent independently a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, among which at least one is a hydrocarbon group having 1 to 30 carbon atoms, and R 14  to R 16  each represent independently a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atom among which at least one is a hydrocarbon group having 1 to 30 carbon atoms. 
       
     
     
         2 . The surface protection composition according to  claim 1 , wherein the average-molecular weight of the lubricant base oil is within a range of 7000 to 10000. 
     
     
         3 . The surface protection composition according to  claim 1 , wherein the composition has a shear viscosity of 1000 mPa·s or higher at 100° C. 
     
     
         4 . The surface protection composition according to  claim 1 , wherein the amide compound comprises one or more selected from compounds represented by the below-presented general formulae (3) to (5):
   R 21 —CO—NH—R 22   (3)
     R 23 —CO—NH—Y 31 —NH—CO—R 24   (4)
     R 25 —NH—CO—Y 32 —CO—NH—R 26   (5),
   where R 21  to R 26  each represent independently a saturated or unsaturated linear hydrocarbon group having 5 to 25 carbon atoms, except that R 22  may be hydrogen, and Y 31  and Y 32  each represent a divalent hydrocarbon group having 1 to 10 carbon atoms selected from an alkylene group and a phenylene group having 1 to 10 carbon atoms, or an alkylphenylene group having 7 to 10 carbon atoms.   
     
     
         5 . The surface protection composition according to  claim 1 , wherein the amide compound is a fatty acid amide having a melting point within a range of 20° C. to 200° C. 
     
     
         6 . The surface protection composition according to  claim 1 , wherein the phosphorus compound has one or more branched structures or one or more carbon-carbon double bond structures in the structure of the hydrocarbon groups. 
     
     
         7 . The surface protection composition according to  claim 1 , wherein the metal forming the composition together with the phosphorus compound is at least one selected from alkali metals, alkaline earth metals, aluminum, titanium, and zinc. 
     
     
         8 . The surface protection composition according to  claim 1 , wherein the composition of the phosphorus compound and the metal has a molecular weight of 3000 or lower. 
     
     
         9 . The surface protection composition according to  claim 1 , wherein the composition covers a surface of a metal component with closely contacting the surface, preventing corrosion of the metal component. 
     
     
         10 . A terminal-fitted electric wire, wherein an electric connection part between a terminal and an electric conductor is covered with the surface protection composition according to  claim 1 .