Antifreeze solution, depletion prevention agent for a plant and heating medium solution

Abstract

An antifreeze solution includes a urea, a surfactant, a purified glycerol, and one of water and alkaline reducing water. The combination of the urea, the surfactant, the purified glycerol, and the water or the alkaline reducing water can be used for a depletion prevention agent for a plant, and can be used for a heating medium solution.

What is claimed is: 
     
         1 . An antifreeze solution comprising a urea, a surfactant, a purified glycerol, and one selected from a group consisting of a water and an alkaline reducing water. 
     
     
         2 . The antifreeze solution according to  claim 1 , wherein an amount of the urea is 5 to 20 wt %, an amount of the surfactant is 0.1 to 5 wt %, an amount of the purified glycerol is 10 to 80 wt %, and the rest of the agent is mainly the water or the alkaline reducing water. 
     
     
         3 . The antifreeze solution according to  claim 2 , wherein an amount of the urea is 10 to 15 wt %. 
     
     
         4 . The antifreeze solution according to  claim 1 , wherein an amount of the water or the alkaline reducing water is 20 to 80 wt %. 
     
     
         5 . The antifreeze solution according to  claim 1 , wherein pH of the solution is 9.0 to 10.0. 
     
     
         6 . The antifreeze solution according to  claim 1 , wherein the antifreeze solution is for use of lawns. 
     
     
         7 . The antifreeze solution according to  claim 1 , wherein the antifreeze solution is for use of road surfaces. 
     
     
         8 . The antifreeze solution according to  claim 1 , wherein the antifreeze solution is for use of building surfaces, automobile surfaces or airplane surfaces. 
     
     
         9 . A depletion prevention agent for plant comprising a urea, a surfactant, a purified glycerol, and one selected from a group consisting of a water and an alkaline reducing water. 
     
     
         10 . The depletion prevention agent for plant according to  claim 9 , wherein an amount of the urea is 5 to 20 wt %, an amount of the surfactant is 0.1 to 5 wt %, an amount of the purified glycerol is 10 to 80 wt %, and the rest of the agent is mainly the water or the alkaline reducing water. 
     
     
         11 . The depletion prevention agent for plant according to  claim 10 , wherein an amount of the urea is 10 to 15 wt %. 
     
     
         12 . The depletion prevention agent for plant according to  claim 9 , wherein an amount of the water or the alkaline reducing water is 20 to 80 wt %. 
     
     
         13 . The depletion prevention agent for plant according to  claim 9 , wherein pH of the agent is 9.0 to 10.0. 
     
     
         14 . A heating medium solution comprising a urea, a surfactant, a purified glycerol, and one selected from a group consisting of a water and an alkaline reducing water. 
     
     
         15 . The heating medium solution according to  claim 14 , wherein an amount of the urea is 5 to 20 wt %, an amount of the surfactant is 0.1 to 5 wt %, an amount of the purified glycerol is 10 to 80 wt %, and the rest of the agent is mainly the water or the alkaline reducing water. 
     
     
         16 . The heating medium solution according to  claim 15 , wherein an amount of the urea is 10 to 15 wt %. 
     
     
         17 . The heating medium solution according to  claim 14 , wherein an amount of the water or the alkaline reducing water is 20 to 80 wt %. 
     
     
         18 . The heating medium solution according to  claim 14 , wherein pH of the solution is 9.0 to 10.0.