Compatibility of Lubricants with Missile Fuels and Oxidizers

Fisch, Kurt R.; Peale, Louise F.; Messina, Joseph; Gisser, Henry

doi:10.1080/05698196208972472

Cited by 9 publications

(7 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These conditions give rise to one period of controlled condensation during each 8-hour cycle. It has been established that this cabinet is approximately two and one-half times more severe than the conventional 100% humidity cabinet described in Specification JAN-H-792, which is generally used for rust tests (3). Results (Table III) indicate that the alpha-substituted acids and n-butyl-/J-hydroxyphenyl stearate show no activity as rust inhibitors.…”

Section: Evaluation Of Inhibitor Activitymentioning

confidence: 95%

Structural Effects of Arylstearic Acids as Combination Oxidation and Rust Inhibitors

Snead¹,

Messina²,

Gisser³

1966

I&EC Product Research and Development

Self Cite

View full text Add to dashboard Cite

Section: Evaluation Of Inhibitor Activitymentioning

confidence: 95%

Structural Effects of Arylstearic Acids as Combination Oxidation and Rust Inhibitors

Snead¹,

Messina²,

Gisser³

1966

I&EC Product Research and Development

Self Cite

View full text Add to dashboard Cite

“…Reported, -30" F. (Faurote et al, 1956). Reported for mixed fluorualkyl camphorated, 0120 (Fisch et al, 1962). Reported, F. (Sommers and Sturgis, 1958).…”

Section: Compoundmentioning

confidence: 99%

“…No reactions were observed. yHE need for lubricating greases compatible with liquid oxygen (LOX) for lubrication requirements in rocket motors and descriptions of available materials have been discussed by Fisch et al (1962), Messina and Gisser (1963), Messina (1967), and Delatt et al (1967). Substances found most compatible with liquid oxygen are perfluorinated materials, particularly the perfluoroalkylamines and perfluoroalkyl ethers.…”

mentioning

confidence: 99%

“…Messina (1967) and Gumprecht (1966) have shown that the incorporation of ether-oxygen into a perfluorinated structure very substantially improves the temperature-vapor pressure rela- tionship. Trifluoropropylmethyl-siloxanes, which contain a substantial proportion of hydrogen, are surprisingly inert according to Fisch et al (1962), presumably because of the presence of silicon in the structure. These silicones have extremely good fluid range properties.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Partly Fluorinated Lubricating Oils and Greases for as LOX-Compatible Lubricants

Breed¹,

Key²,

Wiley³

1970

Product R&D

View full text Add to dashboard Cite

Glutarate, camphorate, tricarballylate, phosphate, phosphonate, ether phosphonitdate, and cyanurate derivatives of partly fluorinated alcohols, H(CF2) .CH20H, were prepared, characterized, and screened for stability under impact in the presence of liquid oxygen. All substances examined exhibited a high degree of stability. The results allowed some correlation between the stability of the sub'stances and the degree and type of hydrogen substitution in the materials. Pour points and normal boiling points for all the liquids are reported, with additional data on volatility, corrosiveness, a n d viscosity of the glutarates. The glutarate oils were thickened with fluorocarbon telomer and the aluminum shear reactivities of the resulting greases were determined. No reactions were observed.THE need for lubricating greases compatible with liquid oxygen (LOX) for lubrication requirements in rocket motors and descriptions of availatle materials have been discussed by Fisch et a/. (1962), Messina and Gisser (1963), Messina (1967), and Delatt et al. (1967. Substances found most compatible with liquid oxygen are perfluorinated materials, particular1:y the perfluoroalkylamines and perfluoroalkyl ethers. Perfluorinated organic substances usually exhibit smaller liquid ranges than the corresponding hydrocarbyl compounds, and have a low activation energy for viscous flow. As a consequence, many of these substances may have high pour points, high vapor pressures at elevated temperature, and poor viscositytemperature relationships.Although LOX-compatibility data are available for some perfluorinated materials, very few data are available for partly fluorinated materials that will allow a correlation of chemical structure with stability. I t is probable that the degree of compatibility will be related to the extent of fluorination (the ratio of fluorine to hydrogen), the sequence of hydrogen and fluorine in the chemical structure, and the presence of other groups or atoms, such as silicon, phosphorus, or oxygen, in the lubricant structure. Each of these modifications can also affect the liquid range properties of a substance. Messina (1967) and Gumprecht (1966) have shown that the incorporation of ether-oxygen into a perfluorinated structure very substantially improves the temperature-vapor pressure rela-

show abstract

“…In contrast tou/@Tcells, manyy/6Tcellsare not restricted by the major histocompatibility complex (MHC) and show broad antigen reactivity [3, 5 , 6].The y/6 Tcells have been found to respond primarily to a variety of bacteria, suggesting a role in early antimicrobial resistance. Evidence has accumulated to indicate that mycobacteria contain potent stimulators for Vy9V62 Tcells of clonal diversity, including the 60-kDa heat shock protein and a low molecular weight (LMW) fraction of 1-3 kDa [3,[7][8][9][10][11][12]. This LMW ligand stimulates selectively the major Vy9V62 Tcell subset.…”

Section: Introductionmentioning

confidence: 99%

Phosphate is essential for stimulation of Vγ9Vδ2 T lymphocytes by mycobacterial low molecular weight ligand

1994

View full text Add to dashboard Cite

T lymphocytes are divided into two subsets which express different T cell receptor heterodimers. In the peripheral blood of healthy individuals, the majority of T cells express the alpha/beta T cell receptor (> 90%) while a minority have the gamma/delta T cell receptor (< 10%). The gamma/delta T cells of adults use preferentially the V gamma 9V delta 2 chain combination. Although the stimulation requirements for gamma/delta T lymphocytes are still undetermined, it has been reported that gamma/delta T cells are not only stimulated, like alpha/beta T cells, by conventional protein antigens and superantigens, but also by unusual ligands. Mycobacteria selectively stimulate V gamma 9V delta 2 T cells, and a nonproteinacious low molecular weight fraction of 1-3 kDa has been identified as the tentative active component. Here, we confirm the nonproteinacious nature of this ligand, and show that it is comprised of unusual carbohydrate and phosphate. Importantly, cleavage of the terminal phosphate by alkaline phosphatase completely abrogates the stimulatory activity of the low molecular weight ligand for V gamma 9V delta 2 T cells. Even mycobacterial whole lysate loses its stimulatory activity, for this T cell subset, after dephosphorylation with alkaline phosphatase. These findings identify phosphocarbohydrates as a novel molecular entity with selective stimulatory activity for a defined T cell subset.

show abstract

Compatibility of Lubricants with Missile Fuels and Oxidizers

Cited by 9 publications

References 2 publications

Structural Effects of Arylstearic Acids as Combination Oxidation and Rust Inhibitors

Structural Effects of Arylstearic Acids as Combination Oxidation and Rust Inhibitors

Partly Fluorinated Lubricating Oils and Greases for as LOX-Compatible Lubricants

Phosphate is essential for stimulation of Vγ9Vδ2 T lymphocytes by mycobacterial low molecular weight ligand

Contact Info

Product

Resources

About