Fire-Resistant Hydraulic Fluids

Abstract

A synthetic and semi-synthetic fire-resistant hydraulic fluid compositions are disclosed. According to one preferred embodiment, the composition may include water, a hydrophilic co-solvent, an oil, a lubricant, a neutralizing agent, a non-ionic surfactant, an anionic surfactant. Optionally, the compositions may further include a corrosion inhibitor, an anti-foaming agent and a biocide.

1 . A semi-synthetic fire-resistant hydraulic fluid composition comprising:
 water in an amount ranging from 25-65 wt %;   a hydrophilic co-solvent present in an amount ranging from 5 to 20 wt %;   an oil component present in an amount ranging from 1-30 wt %;   a lubricant present in an amount ranging from 1 to 10 wt %;   optionally, a vapor corrosion inhibitor (VCI) present in an amount ranging from 1 to 10 wt %;   a neutralizing agent (which neutralizes the tall oil fatty acid) present in an amount ranging from 1 to 10 wt %;   a nonionic surfactant present in an amount ranging from 5 to 25 wt %;   an anionic surfactant present in an amount ranging from 5 to 25 wt %;   optionally, a corrosion inhibitor present in an amount ranging from 0.5 wt % to 5 wt %;   optionally, an anti-foaming agent present in an amount ranging from 0.5 wt % to 5 wt %; and   optionally, a biocide present in an amount ranging from 0.5 wt % to 5 wt %.   
     
     
         2 . The composition according to  claim 1 , further comprising a chelating agent present in an amount ranging from 2 to 10 wt %. 
     
     
         3 . The composition according to  claim 1 , where said oil component is pale oil. 
     
     
         4 . The composition according to  claim 1 , where said oil component is present in an amount ranging from 5 wt % to 20 wt %. 
     
     
         5 . The composition according to  claim 1 , where said lubricant is a tall oil fatty acid. 
     
     
         6 . The composition according to  claim 1 , where said lubricant is present in an amount ranging from 2-5 wt %. 
     
     
         7 . The composition according to  claim 1 , where said neutralizing agent is selected from the group consisting of: primary amine, tertiary amines. 
     
     
         8 . The composition according to  claim 1 , where said nonionic surfactant is a linear alcohol ethoxylate with C9 to C15, ethylene oxide 1 to 10. 
     
     
         9 . The composition according to  claim 1 , where said anionic surfactant is selected from the group consisting of: sulfonate surfactant; disulfonate surfactant; and DDBSA and combinations thereof. 
     
     
         10 . The composition according to  claim 1 , wherein the nonionic surfactant and the anionic surfactant are present in a weight ratio ranging from 1:3 to 3:1. 
     
     
         11 . The composition according to  claim 1 , where the VCI and the neutralizing agent are the same compound. 
     
     
         12 . The composition according to  claim 1 , where the VCI is selected from the group consisting of: monoethanolamine; triethanolamine; and the like. 
     
     
         13 . The composition according to  claim 1 , said composition comprising an emulsion having a particle diameter size of less than 10 nm (MEA). 
     
     
         14 . The composition according to  claim 1 , said composition comprising an emulsion having a particle diameter size of less than 150 nm (TEA). 
     
     
         15 . The composition according to  claim 1  where the anionic surfactant is selected from the group consisting of: Dowfax 10CL. 
     
     
         16 . Composition according to  claim 1  where the nonionic surfactant is selected from the group consisting of: Novel® 23E3. 
     
     
         17 . Composition according to  claim 1  where the neutralizing agent is chlorine chloride. 
     
     
         18 . Composition according to  claim 1  where the hydrophilic co-solvent is butyl cartbitol. 
     
     
         19 . A synthetic fire-resistant hydraulic fluid comprising:
 water in an amount ranging from 25-65 wt %;   a hydrophilic co-solvent present in an amount ranging from 5 to 20 wt %;   a polyalkylene glycol compound present in an amount ranging from 1 to 30 wt %;   a lubricant present in an amount ranging from 1 to 10 wt %;   optionally, a vapor corrosion inhibitor (VCI) present in an amount ranging from 1 to 10 wt %;   a neutralizing agent present in an amount ranging from 1 to 10 wt %;   optionally, a corrosion inhibitor present in an amount ranging from 0.5 wt % to 5 wt %;   optionally, an anti-foaming agent present in an amount ranging from 0.5 wt % to 5 wt %; and   optionally, a biocide present in an amount ranging from 0.5 wt % to 5 wt %.   
     
     
         20 . The composition according to  claim 19 , further comprising a chelating agent present in an amount ranging from 2 to 10 wt %. 
     
     
         21 . The composition according to  claim 19 , where the polyalkylene glycol compound is selected for the group consisting of: UCON® 75-H-90,000 and while UCON® 50-HB-100. 
     
     
         22 . The composition according to  claim 19 , where said oil component is present in an amount ranging from 5 wt % to 20 wt %. 
     
     
         23 . The composition according to  claim 19 , where said lubricant is a tall oil fatty acid. 
     
     
         24 . The composition according to  claim 19 , where said neutralizing agent is selected from the group consisting of: primary amine, tertiary amines. 
     
     
         25 . The composition according to  claim 19 , where the VCI is selected from the group consisting of: monoethanolamine; triethanolamine; and the like.