Synthetic fiber processing agent, and synthetic fiber

Abstract

Disclosed is a synthetic fiber treatment agent containing an amine derivative and a smoothing agent. The amine derivative is a compound in which an alkylene oxide with not less than 2 and not more than 4 carbon atoms is added at a ratio of not less than 1 mole and not more than 30 moles in total to 1 mole of the total of a first amine compound having a hydrocarbon group with not less than 8 and not more than 20 carbon atoms and a second amine compound having a hydrocarbon group with not less than 8 and not more than 20 carbon atoms that differs in the number of carbon atoms from the hydrocarbon group of the first amine compound.

1 . A synthetic fiber treatment agent for treating a synthetic fiber, comprising an amine derivative (A) and a smoothing agent (B), wherein
 the amine derivative (A) is a compound in which an alkylene oxide with not less than 2 and not more than 4 carbon atoms is added at a ratio of not less than 1 mole and not more than 30 moles in total to 1 mole of the total of an amine compound (A1) having a hydrocarbon group with not less than 8 and not more than 20 carbon atoms and an amine compound (A2) having a hydrocarbon group with not less than 8 and not more than 20 carbon atoms that differs in the number of carbon atoms from the hydrocarbon group of the amine compound (A1).   
     
     
         2 . The synthetic fiber treatment agent according to  claim 1 , wherein the alkylene oxide includes an ethylene oxide. 
     
     
         3 . The synthetic fiber treatment agent according to  claim 1 , wherein the smoothing agent (B) includes an amino-modified silicone. 
     
     
         4 . The synthetic fiber treatment agent according to  claim 1 , wherein if the sum of contents of the amine derivative (A) and the smoothing agent (B) is taken as 100% by mass, the synthetic fiber treatment agent contains the amine derivative (A) at a ratio of not less than 3% by mass and not more than 50% by mass and the smoothing agent (B) at a ratio of not less than 50% by mass and not more than 97% by mass. 
     
     
         5 . The synthetic fiber treatment agent according to  claim 1 , further comprising a (poly)oxyalkylene derivative (C), wherein
 the (poly)oxyalkylene derivative (C) is a compound in which an alkylene oxide with not less than 2 and not more than 4 carbon atoms is added at a ratio of not less than 1 mole and not more than 30 moles in total to 1 mole of a monohydric aliphatic alcohol having a hydroxy group at a β-position of an alkyl chain with not less than 4 carbon atoms.   
     
     
         6 . The synthetic fiber treatment agent according to  claim 5 , wherein if the sum of contents of the amine derivative (A), the smoothing agent (B), and the (poly)oxyalkylene derivative (C) is taken as 100% by mass, the synthetic fiber treatment agent contains the amine derivative (A) a ratio of not less than 3% by mass and not more than 40% by mass, the smoothing agent (B) at a ratio of not less than 20% by mass and not more than 94% by mass, and the (poly)oxyalkylene derivative (C) at a ratio of not less than 3% by mass and not more than 50% by mass. 
     
     
         7 . The synthetic fiber treatment agent according to  claim 1 , wherein the synthetic fiber is a carbon fiber precursor. 
     
     
         8 . A synthetic fiber having the synthetic fiber treatment agent according to  claim 1  adhered thereto.