As polymer additives are one of the most expensive components of a lubricant formulation, it is highly desirable to develop additives with high thickening efficiency. Moreover, polymeric additives undergo mechanical shear-induced chain breaking reactions, which determine a decrease of the lubricant viscosity.
Applying polymer prior to a thickening or dewatering process, or "conditioning", is often a requirement for the thickening or dewatering equipment to successfully operate. This operator fact sheet takes readers through the basics of polymers used in thickening and dewatering processes. You will learn about different types of polymer ...
Thickeners & Viscosity Index Improvers help lubricants maintain viscosity and film-forming ability in changing temperatures. Contact Afton Chemical here today. ... a balance between the thickening efficiency and shear stability of the polymer is important. Higher molecular weight polymers make better thickeners, but tend to have less resistance ...
Looked up sodium polyacrylate on wikipedia today, wondering what it's purpose is in athlete's foot spray. According to the article, it's an absorbent polymer often used in diapers, as a thickening agent, and in personal lubricant. Now, the diaper and thickening agent parts make sense (I'm thinking it acts kind of like a sort of fast-setting gelatin). However, the lube part …
To meet various market demands in the lubricant industry, LUBIMAX ® offers customized Viscosity Index Improvers (VII) with optimized treat rates especially designed to provide desired and engineered performance properties such as thickening power and shear stability. Many Olefin Copolymer (OCP) based viscosity index improvers are offered in both solid and liquid forms …
It is suitable for thickening mild surfactant systems, dilutable concentrate systems as well as disinfectant cleaners containing cationic biocides. Novethix™ HC220S polymer is not compatible with lipase. Features and Benefits. Compatible with broad surfactant systems; Provides crystal clear systems; Synergistic thickening with electrolytes
• Viscosity modifiers in crankcase lubricants are polymers • VM's are used in most engine oils and many transmission fluids ... – Cost to achieve required thickening (Cost vs. TE) – Shear Thinning Properties – Low Temperature Properties • Other performance harms/credits
Another important metric is thickening efficiency (TE) that describes the amount of polymer (that is, polymer treat rate) required in a lubricant formulation to reach either a desired kinematic viscosity or dynamic viscosity at a temperature of 100 °C [7].
Understanding shear thickening in colloidal suspensions is of great practical importance. Hsu et al. create responsive polymer-coated silica particles whose rheology can be tuned in situ ...
The chemistry and structure of base oil and polymer additive molecules in lubricants directly affect key performance metrics such as viscosity index, thickening efficiency, and …
Thickening Efficiency, and Traction Coefficient of Lubricants Pawan Panwar 1, Emily Schweissinger 2, Stefan Maier 2, Stefan Hilf 2, Sofia Sirak 2, and Ashlie Martini ... These studies demonstrate that there is a wide range of functionality and behavior of polymers in lubricant formula-tions. The structure and chemistry of the polymers vary ...
What is a Performance Polymer? PPs are a versatile class of polymers . with unique architecture that offer supe-rior thickening efficiencies, low trac-tion coefficients and high shear stabil-ity. Depending on the end use applica-tions, PPs can be used both as viscosity . Lowering the Temperature of Gear Oils . with Performance Polymer Technology
Polymer latex with thickening function was synthesized by inverse emulsion polymerization [22]. The inverse emulsion was prepared by mixing a solution of core-forming monomers, AM and AMPS, with a solution of emulsifier in n-hexane. ... Tribological behaviors of water-based drilling mud with oleic acid-filled microcapsules as lubricant ...
Polymer Technology in lubrication and approaches to reduce costs in formulations. Why use VM instead of blending oils? What's VI? E.W. Dean, G.H.B. Davis, Chem. Met. Eng. 36 (1929) 618–619. ANSI/AGMA 9005-F16. Example: gear with pitchline velocity of 1.8 m/s (35mm dia. at …
VMs are high molecular weight polymer-based additives able to enhance the lubricant's ability to maintain optimal viscosity, shear resistance and shear thickening behavior across a wide temperature range. VMs can be …
polymers with goo d thickening efficiency and shear stability. A comparison between linear. ... measuring permanent viscosity loss of polymer-containing lubricants. T ribol. T., 5:631–639, 2012.
The thickening efficiency is defined by the amount of polymer needed to increase kinematic viscosity and is often recorded as the kinematic viscosity of a blend of a polymer-containing product at a certain weight percent in a standard base oil. …
OEMs, along with lubricant end-users are demanding higher performing, longer lasting and more fuel efficient lubricants. The call for fluids that work better under severe ... Greater thickening translates to lower polymer treat levels in the formulation. The VI increase, thickening and low temperature fluidity
Asteric VMs provide much greater Viscosity Index increase per unit treat rate and thickening. Asteric VMs can more easily achieve very high finished fluid VI compared to conventional …
Figure 3: Variation of the effective friction coefficient µ eff with volume fraction φ of confined polymer for different polymer lubricants. Similar content being viewed by others.
taken as the extent of interaction of the polymer with the base stock, greater the thickening property; greater is the extent of interaction[1]. Fuel economy may also be predicted by the thickening power of a lube oil additive. All the polymers were synthesized by following the method as reported earlier[2] and characterized on the basis
The chemistry, manufacture, dispersancy and utility of each class are described. The comparative functions, properties, thickening ability, dispersancy and degradation of VIIs are discussed. ... J.P.R. (1983) Degradation of polymers in multigrade lubricants by mechanical shear. Polym. Degrad. Stab. 5 425-447. Article CAS Google Scholar Klein, J ...
Carbopol® EZ-4 polymer. Carbopol® EZ-4 polymer is a self-wetting hydrophobically-modified moderately crosslinked acrylic acid copolymer designed to impart thickening, stabilizing and suspension properties to a wide range of applications.
Viscosity index improvers, VIIs, are comprised of five main classes of polymers: polymethylmethacrylates (PMAs), olefin copolymers (OCPs), hydrogenated poly (styrene-co-butadiene or isoprene) (HSD/SIP/HRIs), …
Polymer based self-lubricating materials are widely used in aerospace, mechanical engineering, as well as other major industrial fields due to their excellent properties such as lightweight, low friction, low wear and good formability and processibility [[1], [2], [3]].A polymer self-lubricating material, usually used as a matrix, should possess good mechanical properties …
Prediction of performance of an olefin copolymer in blended base oils based on an easily and quickly measurable intrinsic viscosity parameter, leading to faster screening of large …
The chemistry and structure of base oil and polymer additive molecules in lubricants directly affect key performance metrics such as viscosity index, thickening efficiency, and traction coefficient.
Table 4 compares the thickening rate of all synthetic/ biobased polymer chemistries by the wt% required for ISO 46 and 460 with their VI. This metric was chosen over the typical '1wt% polymer in base oil' metric due to the very wide contrast in MW (102 to 107 g/mol) and the very low viscosity of water (<1 cSt). These
Polymers serve as essential viscosity index (VI) improvers, enhancing the performance of lubricants by stabilizing their viscosity across varying temperatures.
In addition, PTFE powder can also be used as a dry lubricant like graphite and molybdenum disulfide, and the effect is excellent. PTFE powder mixed with propane and butane can be used as non-adhesive antiwear spraying agent, rocket additives and so on. PTFE micropowder can also be used as an effective lubricant thickening agent in lubricants.
AEROSIL® COK 84 and AEROSIL® R 972 lubricant additives enhance flow behavior, thickening, and stability in a variety of industrial applications. Our expertise also extends to wetting agents, lubricity enhancers and deers, with products like TEGO® Surten W 11, TEGOPREN® 5840 and SURFYNOL® 2502.
Thickeners & quenching polymers Clariant is one of the world's leading suppliers of water-soluble polyalkylene glycols used as thickening agents for fire-resistant hydraulic fluids (HFC, HFC-E) and polymer quenchants.