Flame retardant coating

Abstract

A flame retardant coating is disclosed. The flame retardant coating comprises polyurea elastomer, spray processable graphite, a graphite stabilizer agent, and a flame retardant. A method of manufacturing a flame retardant polyurea elastomer coating is also disclosed. A two part polymerizable system is provided comprising a first part containing isocyanates, and a second part containing polyamines. At least one of the first part and the second part contains a flame retardant, and both of spray processable graphite and a graphite stabilizer agent. The first part and the second part are then mixed to form the flame retardant polyurea elastomer coating.

1 - 13 . (canceled) 
     
     
         14 . A method of manufacturing a flame retardant polyurea elastomer coating, the method comprising:
 providing a two part polymerizable system comprising a first part containing isocyanates, and a second part containing polyamines, in which at least one of the first part and the second part contains a flame retardant, and all of spray processable graphite, a graphite suspending agent, and a graphite stabilizer agent, in which the graphite suspending agent comprises hydrogenated castor oil and Octadecanamide,N,N′-1,2-ethanediylbis 12-hydroxy-; and   mixing the first part and the second part to form the flame retardant polyurea elastomer coating, in which the graphite stabilizer agent is selected to form a polymer char that locks the graphite together under flame heat.   
     
     
         15 . A method of adhering a flame retardant polyurea elastomer coating to a smooth surface, the method comprising:
 providing a first part containing isocyanates, and a second part containing polyamines, in which at least one of the first part and the second part contains a flame retardant, a mineral matrix agent, and all of spray processable graphite, a graphite suspending agent, and a graphite stabilizer agent, in which the graphite suspending agent comprises hydrogenated castor oil and Octadecanamide,N,N′-1,2-ethanediylbis 12-hydroxy-;   mixing the first part and the second part to form the flame retardant polyurea elastomer coating on the smooth surface, in which the graphite stabilizer agent is selected to form a polymer char that locks the graphite together under flame heat.   
     
     
         16 . The method of  claim 15  in which the smooth surface comprises metal. 
     
     
         17 . The method of  claim 15  in which the smooth surface comprises phenolic composite panels. 
     
     
         18 . A method of manufacturing a flame retardant polyurea elastomer coating, the method comprising:
 providing a two part polymerizable system comprising a first part containing isocyanates, and a second part containing polyamines, in which at least one of the first part and the second part contains both of spray processable graphite and a graphite suspending agent, in which the graphite suspending agent comprises hydrogenated castor oil and Octadecanamide,N,N′-1,2-ethanediylbis 12-hydroxy-;   mixing the first part and the second part to form the flame retardant polyurea elastomer coating.   
     
     
         19 . The method of  claim 14  in which the graphite stabilizer agent comprises at least one of ammonium polyphosphate, zinc polyborate, melamine polyphosphate, melamine pyrophosphate, triethyl phosphate, and zinc phosphate. 
     
     
         20 . The method of  claim 15  in which the graphite stabilizer agent comprises at least one of ammonium polyphosphate, zinc polyborate, melamine polyphosphate, melamine pyrophosphate, triethyl phosphate, and zinc phosphate. 
     
     
         21 . The flame retardant coating of  claim 14  used as flooring in a railcar. 
     
     
         22 . The Method of  claim 15  in which the flame retardant polyurea elastomer coating is formed as flooring in a railcar.