Synthesis and characterization of complex esters for motor and hydraulic oils

Pavlov, D.J.; Gospodinova, N.N.; Glavchev, I.

doi:10.1108/00368790410515353

Cited by 11 publications

(6 citation statements)

References 1 publication

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“…Amsler & Company, GMBH. Wolpert Werktoffprofmaschinen, CH-8201 Schaffhausen, Switzerland), operating under sliding conditions between two discs and is also included in the Indian Standards 1118-92 specifi cations for multi-purpose gear oils for GL-4 level oils [7,8]. Amsler-type A 135 machine is commonly available in a large number of laboratories.…”

Section: Discussionmentioning

confidence: 99%

Study of synthetic complex esters as automotive gear lubricants

Nagendramma

Kaul

2008

J of Synthetic Lubrication

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A number of di-and triol-centered polyols such as 2, 2-dimethyl-1, 3-propane diol, 2, 2-diethyl-1, 3-propane diol and 1, 1, 1-tris hydroxy methyl propane complex esters have been synthesized using di-carboxylic acids like adipic and sebacic acids (C 6 -C 10 ) and 2-ethyl 1-hexanol with indigenous ion-exchange resin (Indion-130) catalyst. The applicability of these esters as automotive gear lubricants has been evaluated. The products were found to be compatible with extreme pressure additives. In addition, the products are readily biodegradable.

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Section: Discussionmentioning

confidence: 99%

Study of synthetic complex esters as automotive gear lubricants

Nagendramma

Kaul

2008

J of Synthetic Lubrication

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“…The base oil was laboratory made sample of ester type synthetic oil -trimethylolpropane pelargonate (TMP pelargonate), prepared according to the method described by Pavlov et al (2004). Its viscosity characteristics are given in Table I.…”

Section: Methodsmentioning

confidence: 99%

About the performance of some viscosity index improvers in a synthetic oil of ester type

Gospodinova¹,

Pavlov²,

Glavchev

2007

Industrial Lubrication and Tribology

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If you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services.Emerald is both COUNTER 4 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation. AbstractPurpose -This paper seeks to investigate the influence of chemical structure of ester basestock (trimethylolpropane pelargonate) on the viscosity characteristics of formulations obtained and the operating mechanism of two widely used viscosity index improvers -poly(butadiene-styrene) and poly(alkyl methacrylate). Design/methodology/approach -Oil formulations of trimethylolpropane pelargonate and poly(butadiene-styrene)/poly(alkyl methacrylate) as viscosity index improvers are prepared. Their kinematic viscosity at different temperatures is measured. Relative, intrinsic and characteristic viscosities are calculated from the experimental data. Findings -The thickening ability of linear polymers from butadiene-styrene and alkyl methacrylate in a synthetic oil of ester type (trimethylolpropane pelargonate) is clarified. The conformation of these polymers is studied. Results of comparative tests about the influence of the type of polymer and solvent on characteristic and intrinsic viscosity are presented. It has been established that with the increasing of temperature the quality of used synthetic oil decreased and the characteristic viscosity decreased for both polymers. At lower temperatures the intermolecular interaction between the polymeric macromolecules becomes bigger than their interaction with the molecules of solvent. Molecule associates have been possibly formed at low temperature. These associates increase the viscosity of solutions and this increase is bigger at low temperatures in comparison with high temperatures. Practical implications -Viscosity index improvement of poly(butadiene-styrene) and poly(alkyl methacrylate) is determined. The information about concentrations and viscosity is of practical interest. Originality/value -The combination of these synthetic basestock and viscosity index improvers is a new one. The data obtained may have value for the oil production.

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“…The three CE on the base of adipic acid (A), sebacic acid (S), and pelargonic acid (P), respectively, were laboratory made samples, obtained according to the method reported elsewhere (Pavlov et al , 2004a). The PVC blends were made with Slovinyl EP 702, Vynilit P 70 E and Olivyl 170100, products of Novacke chemicke zavody, Slovakia.…”

Section: Methodsmentioning

confidence: 99%

Application of complex esters in poly(vinyl chloride) plastisols and plasticats

Pavlov

Gospodinova

Glavchev

et al. 2005

Pigment &Amp; Resin Technology

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PurposeTo evaluate the efficiency of complex esters as plasticizers in polyvinyl chloride plastisols and plasticates.Design/methodology/approachSeveral poly(vinyl chloride) plastisols and plasticates were prepared with standard phthalate plasticizers and complex esters and were characterised using standard and laboratory methods.FindingsThe use of mixtures of three new CE with standard phthalate plasticizers increased the physical, mechanical and electric characteristics of the resulting PVCPs and PVCPl.Research limitations/implicationsThe use of three new CE, obtained by esterification of dicarboxylic acids (adipic, sebacic, pelargonic), poly(ethylene glycol) and i‐octanole, as plasticizers of poly(vinyl chloride) plastisols and plasticates was investigated. The use of CE based on other organic acids could be explored.Practical implicationsThe results confirmed the efficiency of plasticization of PVC by CE. Such a finding has significant industrial implication.Originality/valueSeveral findings are original and are of importance to relevant industry. The new CE with high molecular weights were effective plasticizers of PVC. The efficiency of the plasticizers depended on their chemical structure. The molecular weight of the CE had no influence on the compatibility of plasticizers and other components of the PVC plastisols and plasticates.

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Synthesis and characterization of complex esters for motor and hydraulic oils

Cited by 11 publications

References 1 publication

Study of synthetic complex esters as automotive gear lubricants

Study of synthetic complex esters as automotive gear lubricants

About the performance of some viscosity index improvers in a synthetic oil of ester type

Application of complex esters in poly(vinyl chloride) plastisols and plasticats

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