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The information below is provided by the Dupont Website. Krytox® GPL 200–207 greases are white buttery greases with all of the same properties as the GPL 100–107 oils that they are made from, but they are in grease form. The grease additives may alter the chemical resistance of the grease. The standard grease consistency is NLGI grade 2 penetration (265–295). Softer or harder NLGI penetration grades can be made by special order. Special nonmelting silica thickeners are available for applications that are higher than the 325°C (617°F) melting point of the standard PTFE thickener. All standard grades of grease are thickened with Krytox® 2000 polytetrafluoroethylene (PTFE), whose formula is (CF2-CF2)n. This special high efficiency thickener has a melting point of 325°C (617°F) and has low molecular weight and submicron (0.2 m) particle size for higher performance in bearings. Krytox® GPL 220–227 anticorrosion greases are white greases that contain 2% sodium nitrite. These grades provide rust protection at ambient temperatures, corrosion protection at high temperatures, and antiwear protection. The grease additives may alter the chemical resistance of the grease. The standard grease consistency is NLGI grade 2 penetration (265–295). Softer or harder NLGI penetration grades can be made by special order. Special nonmelting silica thickeners are available for applications that are higher than the 325°C(617°F) melting point of the standard PTFE thickener. These greases are based on Krytox® GPL 100–107 oils - clear, colorless, fluorinated synthetic oils that are nonreactive, nonflammable, safe in chemical and oxygen service, and are long-lasting. Krytox® is a perfluoropolyether (PFPE)—also called perfluoro-alkylether (PFAE) or perfluoropolyalkylether (PFPAE). The polymer chain is completely saturated and contains only carbon, oxygen, and fluorine. On a weight basis, a typical Krytox® oil contains 21.6% carbon, 9.4% oxygen, and 69.0% fluorine. Krytox® oils are perfluoropolyethers that are thickened to form a grease with PTFE – polytetrafluoroether, which is sold by the manufacturer DuPont under the brand name Teflon®. Krytox® was developed in the 1960s by DuPont together with the U.S. Airforce and later used to great success by NASA in the Apollo space missions. Krytox® was the first synthetic lubricant formulated with PTFE. Krytox® has become a general-purpose product with a wide range of uses thanks to its extraordinary product characteristics and its ability to accept various additives. The general-purpose lubricants or GPLs. (We do not proofread any ads submitted by members) |
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