Flame retardant agent for thermoplastic resin and flame retardant resin composition

Abstract

A flame retardant agent for a thermoplastic resin, which enables the thermoplastic resin containing the flame retardant agent to keep its viscous property, to be made into a fiber readily, and to exhibit flame retardant effect even when ammonium dihydrogen phosphate is contained in the flame retardant agent as a non-halogen flame retardant component. Also disclosed is a flame retardant resin composition containing the flame retardant agent. Specifically, the flame retardant agent for a thermoplastic resin comprises ammonium dihyrogen phosphate, potassium hydroxide, glycerin and urea, wherein potassium hydroxide is contained in an amount of 10 to 70 parts by weight, glycerin is contained in an amount of 0.1 to 4.0 parts by weight, and urea is contained in an amount of 1 to 9 parts by weight relative to 100 parts by weight of ammonium dihydrogen phosphate.

1 . A flame retardant agent for a thermoplastic resin, comprising ammonium dihydrogen phosphate and potassium hydroxide. 
     
     
         2 . The flame retardant agent for a thermoplastic resin according to  claim 1 , wherein 10 to 70 parts by weight of potassium hydroxide is contained relative to 100 parts by weight of ammonium dihydrogen phosphate. 
     
     
         3 . A flame retardant agent for a thermoplastic resin, comprising ammonium dihydrogen phosphate, potassium hydroxide, and glycerin. 
     
     
         4 . The flame retardant agent for a thermoplastic resin according to  claim 3 , wherein 10 to 70 parts by weight of potassium hydroxide and 0.1 to 4.0 parts by weight of glycerin are contained relative to 100 parts by weight of ammonium dihydrogen phosphate. 
     
     
         5 . The flame retardant agent for a thermoplastic resin according to  claim 3 , wherein 10 to 70 parts by weight of potassium hydroxide and 5.0 to 10.0 parts by weight of glycerin are contained relative to 100 parts by weight of ammonium dihydrogen phosphate. 
     
     
         6 . A flame retardant agent for thermoplastic resin, comprising ammonium dihydrogen phosphate, potassium hydroxide, and urea. 
     
     
         7 . The flame retardant agent for a thermoplastic resin according to  claim 6 , wherein 10 to 70 parts by weight of potassium hydroxide and 1 to 9 parts by weight of urea are contained relative to 100 parts by weight of ammonium dihydrogen phosphate. 
     
     
         8 . A flame retardant agent for a thermoplastic resin, comprising ammonium dihydrogen phosphate, potassium hydroxide, glycerin, and urea. 
     
     
         9 . A flame retardant resin composition, wherein the flame retardant agent for thermoplastic resin according to  claim 1  is added to a thermoplastic resin so that the content of the flame retardant agent is 4 to 16% by weight relative to the total amount. 
     
     
         10 . The flame retardant resin composition according to  claim 9 , wherein the thermoplastic resin is polyethylene terephthalate.