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INDEX wear properties

Non-inhibited refined mineral oil Rust and oxidation inhibited refined mineral oil HL type with improved anti-wear properties HL type with improved viscosity index HM type with improved viscosity index HM type with antistick-slip properties Triglycerides (vegetable oUs)... [Pg.265]

The unusual properties of silicones make them useful for some special applications as lubricants (20). They are relatively resistant to deterioration by heat or oxidation, and have the desirable properties of high viscosity index, low pour point, and low volatility. They may promote wear in steel-to-steel bearing surfaces under conditions of sliding friction, and are not generally useful for such applications. Silicones are satisfactory lubricants in antifriction bearings and in some bearing combinations other than steel sliding on steel. [Pg.245]

Modified hard-core RMs by phosphosulfurized compound. Improved extreme-pressure and antiwear properties have also been obtained with the introduction of some chemical species, such as sulfur, phosphorus or boron derivatives, into the colloidal core (Delfort et al., 1998 Inoue, 1993 Inoue and Nose, 1987). Welding loads, load wear index and wear scar diameter at 5 wt% of a CaC03 core surrounded by a calcium alkylaryl-sulfonate surfactant shell, and modified by phosphosulfurized calcium carbonate core were evaluated for calcium dialkyl dithiophosphate (CaDTP) and calcium trithiophosphate (CaTTP) with the four-ball extreme-pressure test (ASTM D2783 standard method). Both modified products exhibit improved extreme-pressure performances (welding load and load wear index), while their antiwear properties (wear scar diameter) compared to those of the original micellar substrate remain at least at the same level. [Pg.104]

Test which is used to determine the relative wear-ball preventing properties of lubricants under boundary test lubrication conditions. Two values are reported - load wear index and weld point from two procedures EP test ASTM D 2596 and wear test ASTM D2266. There are four steel /2-inch balls. Three of the balls are held together in a cup filled with lubricant while the fourth ball is rotated against them. Resistance to motion. [Pg.307]

The results of an abrasion test (ASTM D4060-01) carried out for 500 test cycles are presented in Table 11.4. Wear index decreased monotonically with the increase in the HDDA content in the coating formulation, which showed that the abrasion resistance property of BDGDA improved in the presence of HDDA. Improvement in abrasion resistance of the coating with increase in HDDA content is attributed to the increase in the cross-link density on addition of HDDA. [Pg.316]

Uses Emulsifier lubricant in plastic-on-metal wear applies. lubricant for fibers antitackifier and mar resist, aid for PU coatings Properties Insol. in water m.w. 10,000 sp.gr. 1.02 vise. 400 cSt pour pt. -29 C ref. index 1.4140 25% nonsiloxane DBE-IB [DuPont Nylon]... [Pg.234]

Aromatic dimethacrylates are used in many applications in dentistry, optical eye wear, fiber optics, and microelectronics. In addition, carbazole based polymers have demonstrated good photorefractive, optical, and chargetransporting properties, combined with ease of processing. By incorporating carbazole into novel aromatic methacrylates and dimethacrylates, materials with enhanced optical properties, such as refractive index are obtained. Such photocrosslinkable oligomers can be illustrated as follows ... [Pg.230]

Although tread vulcanizates containing only a solution rubber have superior dynamic properties, their main deficiency is their poor ultimate properties, such as tear strength and tensile strength, which relate to wear. The need for improved abrasion resistance in solution rubber is indicated by a comparison of laboratory data (Table 11) for black filled vulcanizates of E-SBR, solution SBR (S-SBR) and MVBR at nearly equivalent 7. For E-SBR, it is possible that a higher tram Icis ratio of the polybutadiene portion and a broader MWD may relate to its better abrasion resistance (Pico Index). The relative values... [Pg.43]

Features of ab-PBI are a Tg of 485°C, low coefficient of friction, high wear resistance properties, very high limiting oxygen index (LOI), very high heat deflection temperature (HDT), and extended high-temperature mechanical performance and excellent chemical resistance. Indeed, ab-PBI offers high heat resistance and mechanical property retention over 300°C. Potential uses are PBI areas mentioned earlier and in membranes in fuel cells, which operate at elevated temperatures. [Pg.18]


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See also in sourсe #XX -- [ Pg.197 ]




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