Production process of phosphonic acid metal salt and thermoplastic resin composition containing phosphonic acid metal salt

Abstract

A method for producing a phenylphosphonic acid metal salt, including reacting a phenylphosphonic acid compound (a) with a metal salt, metal oxide or metal hydroxide (b) that is present in an amount beyond the equivalent; a phenylphosphonic acid metal salt composition comprising a phenylphosphonic acid metal salt and surplus metal salt, surplus metal oxide or surplus metal hydroxide produced by the method; and a thermoplastic resin composition comprising the phenylphosphonic acid metal salt composition.

1 . A method for producing a phenylphosphonic acid metal salt, which comprises reacting a phenylphosphonic acid compound (a) of formula [1] 
       
         
           
           
               
               
           
         
         in which R 1  and R 2  are independently of each other hydrogen atom, C 1-10 alkyl or 
         C 1-10 alkoxycarbonyl, with a metal salt, metal oxide or metal hydroxide (b) that is present in an amount beyond the equivalent. 
       
     
     
         2 . The method according to  claim 1 , wherein the reaction of the phenylphosphonic acid compound (a) with the metal salt, metal oxide or metal hydroxide (b) is carried out in a solvent that hardly dissolves the metal salt, metal oxide or metal hydroxide (b). 
     
     
         3 . The method according to  claim 1 , wherein the reaction of the phenylphosphonic acid compound (a) with the metal salt, metal oxide or metal hydroxide (b) is carried out in a molar ratio of (b):(a) of 100:0.01 to 100:90. 
     
     
         4 . The method according to  claim 1 , wherein the metal of the metal salt, metal oxide or metal hydroxide (b) is zinc, calcium or manganese. 
     
     
         5 . The method according to  claim 4 , wherein the metal of the metal salt, metal oxide or metal hydroxide (b) is zinc or calcium. 
     
     
         6 . The method according to  claim 5 , wherein the metal salt, metal oxide or metal hydroxide (b) is zinc oxide or calcium carbonate. 
     
     
         7 . A phenylphosphonic acid metal salt composition comprising a phenylphosphonic acid metal salt and surplus metal salt, surplus metal oxide or surplus metal hydroxide, produced by the method according to  claim 1 . 
     
     
         8 . The phenylphosphonic acid metal salt composition according to  claim 7 , wherein the metal of the phenylphosphonic acid metal salt and the surplus metal salt, surplus metal oxide or surplus metal hydroxide is zinc. 
     
     
         9 . The phenylphosphonic acid metal salt composition according to  claim 7 , wherein the metal of the phenylphosphonic acid metal salt and the surplus metal salt, surplus metal oxide or surplus metal hydroxide is calcium. 
     
     
         10 . A crystal nucleating agent comprising the phenylphosphonic acid metal salt composition according to  claim 7 . 
     
     
         11 . A thermoplastic resin composition comprising the phenylphosphonic acid metal salt composition according to  claim 7  and a thermoplastic resin. 
     
     
         12 . The thermoplastic resin composition according to  claim 11 , wherein the phenylphosphonic acid metal salt composition comprising a phenylphosphonic acid metal salt and surplus metal salt, surplus metal oxide or surplus metal hydroxide is contained in an amount of 0.01 to 10 parts by mass based on 100 parts by mass of the thermoplastic resin. 
     
     
         13 . The thermoplastic resin composition according to  claim 11 , wherein the thermoplastic resin is a poly(lactic acid) resin. 
     
     
         14 . The thermoplastic resin composition according to  claim 13 , wherein the phenylphosphonic acid metal salt composition is the phenylphosphonic acid metal salt composition comprising a phenylphosphonic acid metal salt and surplus metal salt surplus metal oxide or surplus metal hydroxide, wherein the metal of the phenylphosphonic acid metal salt and the surplus metal salt, surplus metal oxide or surplus metal hydroxide is zinc. 
     
     
         15 . The thermoplastic resin composition according to  claim 11  wherein the thermoplastic resin is selected from the group consisting of polypropylene, polypropylene copolymers, polyethylene, polyethylene copolymers, polybutylene and poly(4-methyl-1-pentene). 
     
     
         16 . The thermoplastic resin composition according to  claim 15 , wherein the phenylphosphonic acid metal salt composition comprises a phenylphosphonic acid metal salt and surplus metal salt, surplus metal oxide or surplus metal hydroxide, wherein the metal of the phenylphosphonic acid metal salt and the surplus metal salt, surplus metal oxide or surplus metal hydroxide is calcium.