Fire-Resistant Hydraulic Fluids
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.