Solvent for treating polystyrene resin and method of treating polystyrene resin with the same

Abstract

A solvent for polystyrene resin treatment which is for use in contracting a polystyrene resin by contact therewith and is excellent in treatment rate, stickiness and sedimentation of the substance being treated, etc.; and a method of treating a polystyrene resin with the solvent. The solvent for polystyrene resin treatment, which is a liquid medium for bringing a polystyrene into a jelly- or gel-state and thereby reducing the volume, comprises an aliphatic hydrocarbon and a solvent in which polystyrene resins are soluble, and is characterized in that the mixing proportion of the aliphatic hydrocarbon is 37.5±2.5 wt % based on the liquid medium.

1 : A solvent for polystyrene resin treatment that is a liquid medium for putting a polystyrene resin into a jelly or gel state to reduce the volume of the polystyrene resin, the liquid medium comprising an aliphatic hydrocarbon and a polystyrene resin-dissolving solvent, wherein the mixing proportion of the aliphatic hydrocarbon in the liquid medium is 37.5±2.5 wt %.  
     
     
         2 : The solvent for polystyrene resin treatment according to  claim 1 , wherein the polystyrene resin-dissolving solvent is at least one selected from compounds having in the molecular structure thereof at least one functional group selected from benzene rings, ester groups, ketone groups and ether groups.  
     
     
         3 : The solvent for polystyrene resin treatment according to  claim 1 , wherein the polystyrene resin-dissolving solvent comprises at least one terpenic compound.  
     
     
         4 : The solvent for polystyrene resin treatment according to  claim 1 , wherein the polystyrene resin-dissolving solvent comprises at least one selected from the group consisting of alkylbenzenes having 7 to 16 carbon atoms, limonene, 2-octanone and ethylene glycol diethyl ether.  
     
     
         5 : The solvent for polystyrene resin treatment according to  claim 1 , wherein the polystyrene resin-dissolving solvent comprises at least one alkylbenzene selected from alkylbenzenes having 7 to 12 carbon atoms.  
     
     
         6 : The solvent for polystyrene resin treatment according to  claim 1 , wherein the polystyrene resin-dissolving solvent comprises at least one alkylbenzene selected from alkylbenzenes having 8 to 10 carbon atoms.  
     
     
         7 : The solvent for polystyrene resin treatment according to  claim 1 , wherein the polystyrene resin-dissolving solvent contains at least one alkylbenzene selected from the group consisting of xylene, alkylbenzenes having 9 carbon atoms and alkylbenzenes having 10 carbon atoms.  
     
     
         8 : The solvent for polystyrene resin treatment according to  claim 1 , wherein the aliphatic hydrocarbon comprises at least 90 wt % of n-tridecane.  
     
     
         9 : The solvent for polystyrene resin treatment according to  claim 1 , wherein the mixing proportion of the aliphatic hydrocarbon in the liquid medium is 37.5±2.0 wt %.  
     
     
         10 : The solvent for polystyrene resin treatment according to  claim 1 , wherein the mixing proportion of the aliphatic hydrocarbon in the liquid medium is 37.5±1.5 wt %.  
     
     
         11 : A method of treating a polystyrene resin, comprising putting polystyrene foam into a dissolved or gel state to reduce the volume of the polystyrene foam using the solvent for polystyrene resin treatment according of  claim 1 .  
     
     
         12 : The solvent for polystyrene resin treatment according to  claim 2 , wherein the polystyrene resin-dissolving solvent comprises at least one alkylbenzene selected from alkylbenzenes having 7 to 12 carbon atoms.  
     
     
         13 : The solvent for polystyrene resin treatment according to  claim 4 , wherein the polystyrene resin-dissolving solvent comprises at least one alkylbenzene selected from alkylbenzenes having 7 to 12 carbon atoms.  
     
     
         14 : The solvent for polystyrene resin treatment according to  claim 2 , wherein the polystyrene resin-dissolving solvent comprises at least one alkylbenzene selected from alkylbenzenes having 8 to 10 carbon atoms.  
     
     
         15 : The solvent for polystyrene resin treatment according to  claim 4 , wherein the polystyrene resin-dissolving solvent comprises at least one alkylbenzene selected from alkylbenzenes having 8 to 10 carbon atoms.  
     
     
         16 : The solvent for polystyrene resin treatment according to  claim 2 , wherein the polystyrene resin-dissolving solvent contains at least one alkylbenzene selected from the group consisting of xylene, alkylbenzenes having 9 carbon atoms and alkylbenzenes having 10 carbon atoms.  
     
     
         17 : The solvent for polystyrene resin treatment according to  claim 4 , wherein the polystyrene resin-dissolving solvent contains at least one alkylbenzene selected from the group consisting of xylene, alkylbenzenes having 9 carbon atoms and alkylbenzenes having 10 carbon atoms.  
     
     
         18 : The solvent for polystyrene resin treatment according to  claim 2 , wherein the aliphatic hydrocarbon comprises at least 90 wt % of n-tridecane.  
     
     
         19 : The solvent for polystyrene resin treatment according to  claim 3 , wherein the aliphatic hydrocarbon comprises at least 90 wt % of n-tridecane.  
     
     
         20 : The solvent for polystyrene resin treatment according to  claim 4 , wherein the aliphatic hydrocarbon comprises at least 90 wt % of n-tridecane.  
     
     
         21 : The solvent for polystyrene resin treatment according to  claim 2 , wherein the mixing proportion of the aliphatic hydrocarbon in the liquid medium is 37.5±2.0 wt %.  
     
     
         22 : The solvent for polystyrene resin treatment according to  claim 3 , wherein the mixing proportion of the aliphatic hydrocarbon in the liquid medium is 37.5±2.0 wt %.  
     
     
         23 : The solvent for polystyrene resin treatment according to  claim 4 , wherein the mixing proportion of the aliphatic hydrocarbon in the liquid medium is 37.5±2.0 wt %.  
     
     
         24 : The solvent for polystyrene resin treatment according to  claim 2 , wherein the mixing proportion of the aliphatic hydrocarbon in the liquid medium is 37.5±1.5 wt %.  
     
     
         25 : The solvent for polystyrene resin treatment according to  claim 3 , wherein the mixing proportion of the aliphatic hydrocarbon in the liquid medium is 37.5±1.5 wt %.  
     
     
         26 : The solvent for polystyrene resin treatment according to  claim 4 , wherein the mixing proportion of the aliphatic hydrocarbon in the liquid medium is 37.5±1.5 wt %.  
     
     
         27 : A method of treating a polystyrene resin, comprising putting polystyrene foam into a dissolved or gel state to reduce the volume of the polystyrene foam using the solvent for polystyrene resin treatment according to  claim 2 .  
     
     
         28 : A method of treating a polystyrene resin, comprising putting polystyrene foam into a dissolved or gel state to reduce the volume of the polystyrene foam using the solvent for polystyrene resin treatment according to  claim 3 .  
     
     
         29 : A method of treating a polystyrene resin, comprising putting polystyrene foam into a dissolved or gel state to reduce the volume of the polystyrene foam using the solvent for polystyrene resin treatment according to  claim 4.