Ether composition

Abstract

An ether composition and a lubricant which bond to substrates with a high bonding ratio and form a coating having a low friction coefficient surface are provided. An ether composition comprising at least two compounds selected from (X—) 3 Y 3 , (X—) 2 Y 3 —Z and X—Y 3 (—Z) 2 wherein the total number of moles of CF 3 groups in Z in relation to the sum of the total number of moles of CF 3 groups in Z and the total number of moles of OH groups in X is at least 0.001 and at most 0.30. X is HO—(CH 2 CH 2 O) a .(CH 2 CH(OH)CH 2 O) b -Q-, Y 3 is a perfluoroalkane-triyl group, and Z is CF 3 (CF 2 ) s O(CF 2 CF 2 O) g —, wherein a is an integer of from 0 to 100, b is 0 or 1, s is an integer of from 0 to 19, g is an integer of from 3 to 200, and Q is a polyfluorinated polymethylene group or a polyfluorinated polymethylene group having an etheric oxygen atom bonded between carbon-carbon atoms and/or an etheric oxygen atom bonded to the terminal carbon atom bonded to Y 3 .

1 . An ether composition comprising at least two compounds selected from the group consisting of a compound represented by the following formula (A1), a compound represented by the following formula (A2) and a compound represented by the following formula (A3), wherein the total number of moles of CF 3  groups in the group represented by the following formula (Z) in relation to the sum of the total number of moles of CF 3  groups in the group represented by the following formula (Z) and the total number of moles of OH groups in the group represented by the following formula (X) (CF 3 /(OH+CF 3 )) is at least 0.001 and at most 0.30:
   (X—) 3 Y 3   (A1),
     (X—) 2 Y 3 —Z  (A2),
     X—Y 3 (—Z) 2   (A3).
   Wherein X is a group represented by the following formula (X),   Y 3  is a perfluoroalkane-triyl group or a perfluoroalkane-triyl group having an etheric oxygen atom inserted between carbon-carbon atoms, provided that when Y 3  has a CF 3  group, the CF 3  group is bonded to a quaternary carbon,
   HO—(CH 2 CH 2 O) a .(CH 2 CH(OH)CH 2 O) b -Q-  (X),
 
   CF 3 (CF 2 ) s O(CF 2 CF 2 O) g —  (Z).
 
   Wherein in the above formulae (X) and (Z), a is an integer of from 0 to 100, b is 0 or 1, s is an integer of from 0 to 19, g is an integer of from 3 to 200, and Q is a polyfluorinated polymethylene group, a polyfluorinated polymethylene group having an etheric oxygen atom bonded between carbon-carbon atoms, a polyfluorinated polymethylene group having an etheric oxygen atom bonded to the terminal carbon atom bonded to Y 3  or a polyfluorinated polymethylene group having an etheric oxygen atom bonded between carbon-carbon atoms and an etheric oxygen atom bonded to the terminal carbon atom bonded to Y 3 .   
     
     
         2 . The ether composition according to  claim 1 , wherein X is a group selected from the group consisting of a group represented by the following formula (X1), a group represented by the following formula (X2), a group represented by the following formula (X3) and a group represented by the following formula (X4):
   HOCH 2 CF 2 O(CF 2 CF 2 O) d —  (X1),
     HOCH 2 CH(OH)CH 2 OCH 2 CF 2 O(CF 2 CF 2 O) d —  (X2),
     HOCH 2 CH 2 CF 2 O(CF 2 CF 2 O) d —  (X3),
     HOCH 2 CH 2 OCH 2 CF 2 O(CF 2 CF 2 O) d —  (X4),
   
       wherein d is an integer of from 1 to 200. 
     
     
         3 . The ether composition according to  claim 1 , wherein Y 3  is a group selected from the group consisting of a group represented by the following formula (Y 3 -1), a group represented by the following formula (Y 3 -2) and a group represented by the following formula (Y 3 -3). 
       
         
           
           
               
               
           
         
       
     
     
         4 . The ether composition according to  claim 1 , wherein the compound represented by the formula (A1) is a compound represented by the following formula (A1-1), the compound represented by the formula (A2) is a compound represented by the following formula (A2-1a), a compound represented by the following formula (A2-1b) or a combination of a compound represented by the following formula (A2-1a) and a compound represented by the following formula (A2-1b), and the compound represented by the formula (A3) is a compound represented by the following formula (A3-1a), a compound represented by the following formula (A3-1b) or a combination of a compound represented by the following formula (A3-1a) and a compound represented by the following formula (A3-1b). 
       
         
           
           
               
               
           
         
       
     
     
         5 . The ether composition according to  claim 1 , wherein the compound represented by the formula (A1), the compound represented by the formula (A2) and the compound represented by the formula (A3) have no —OCF 2 O— structure. 
     
     
         6 . The ether composition according to  claim 1 , wherein the total amount of the compound represented by the formula (A1), the compound represented by the formula (A2) and the compound represented by the formula (A3) is at least 95 mass % in relation to the ether composition. 
     
     
         7 . The ether composition according to  claim 1 , which has a number average molecular weight of from 500 to 1,000,000 and a molecular weight distribution (mass average molecular weight/number average molecular weight) of from 1.01 to 1.5. 
     
     
         8 . A lubricant containing the ether composition as defined in  claim 1 .