Preparation of 12-hydroxystearic acid, the raw material for plastic greases

Maskaev, A. K.; Man'kovskaya, N. K.; Lendel, Iryna; Fedorovskii, V. T.; Simurova, E. I.; Terent'eva, V. N.

doi:10.1007/bf00718698

Cited by 21 publications

(12 citation statements)

References 2 publications

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“…The spacing estimated from this peak position is very close to that of SA reported by other researchers [15][16][17]. These facts suggest that dominant materials of the impurity in u-12-HSA are stearic acid produced in a side reaction of hydrogenation process [8].…”

Section: Structure Of Crystalline Fibersupporting

confidence: 88%

“…The percentage is also close to that of SA usually contained in 12-HSA produced from castor oil [8].…”

Section: Structure Of Crystalline Fibersupporting

confidence: 74%

“…In the hydrogenation process, the commercial products contain impurities such as stearic acid, ricinoleic acid and oleic acid etc. [8] (The amount of impurities is typically 20 − 30 % in weight). Consequently, the sol-gel transition behavior of commercial products of 12-HSA is possible to be largely different from that of pure 12-HSA.…”

Section: Introductionmentioning

confidence: 99%

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Structural and Thermal Properties of Unpurified and Purified 12-Hydroxystearic Acid Solutions

et al. 2012

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Section: Structure Of Crystalline Fibersupporting

confidence: 88%

“…The percentage is also close to that of SA usually contained in 12-HSA produced from castor oil [8].…”

Section: Structure Of Crystalline Fibersupporting

confidence: 74%

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Structural and Thermal Properties of Unpurified and Purified 12-Hydroxystearic Acid Solutions

et al. 2012

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“…These spots are carbon rich with trace contributions from elements generally present in the paint. The anomalous behaviour of this sample in recording strong underside zinc stearate FTIR absorption had been attributed to the likely inclusion of aluminium hydroxide in the formulation HCO principally comprises glycerides of 12-hydroxystearic acid and stearic acid (Maskaev et al 1971) and its presence could explain both the small carbon rich masses and the higher stearic acid concentration available for soap formation in this paint than comparable paints without HCO.…”

Section: Naples Yellow Hue: Linseed and Safflower Oil Based Paintsmentioning

confidence: 94%

Zinc White and the Influence of Paint Composition for Stability in Oil Based Media

Osmond

2014

Issues in Contemporary Oil Paint

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Zinc oxide is a prevalent pigment in twentieth century oil based paints. Its reactivity with fatty acids has consequences for paint film properties and stability. Resulting zinc carboxylates are implicated in a variety of deterioration phenomena affecting late nineteenth and twentieth century paintings. Naturally aged artists' oil paints and reference paint film draw downs are investigated using scanning electron microscopy, and conventional attenuated total reflectance and synchrotron transmission Fourier transform infrared spectroscopy. This study reports results for soybean oil paints and Naples yellow hue pigment mixtures with zinc oxide in addition to previously reported findings for linseed and safflower oil based paints involving zinc oxide alone and in combination with lead and titanium whites. A solvent model examining interactions between zinc oxide and stearic acid or aluminium stearate supports observations made in paint films. The significance of aluminium stearate as a stearic acid source in paint formulations is corroborated and is more significant than oil type or pigment combination for formation of high concentrations and more pronounced separation of saturated C16 and C18 chain zinc carboxylates.

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“…Oleje syntetyczne są bardziej korzystne ze względu na większą stabilność i zdolność do pracy w ekstremalnej temperaturze. Kwas 12-hydroksystearynowy otrzymuje się poprzez uwodornienie oleju rycynowego [14]. Po pierwotnej reakcji nasycania wiązań podwójnych, odwodnienie i redukcję grupy hydroksylowej prowadzi się z kwasem stearynowym.…”

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Zastosowanie montmorylonitu jako dodatku modyfikującego właściwości tribologiczne smaru plastycznego wytworzonego na bazie roślinnej

Kozdrach

2015

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Zastosowanie montmorylonitu jako dodatku modyfikującego właściwości tribologiczne smaru plastycznego wytworzonego na bazie roślinnej W publikacji przedstawiono wyniki badań wpływu różnej ilości dodatku modyfikującego na właściwości tribologiczne wybranych kompozycji smarowych. Do modyfikacji smaru plastycznego wytworzonego na bazie roślinnej i zagęszczonego 12-hydroksystearynianem litu zastosowano montmorylonit -jako przedstawiciel krzemianów warstwowych. Wykonano testy tribologiczne za pomocą aparatu czterokulowego dla smaru bazowego, tzn. niezawierającego dodatku modyfikującego, i porównano je z wynikami uzyskanymi dla smarów plastycznych zmodyfikowanych różną ilością krzemianu warstwowego. Do oceny właściwości tribologicznych wykorzystano wyniki badań granicznego obciążenia zużycia, obciążenia zespawania, obciążenia zacierającego, granicznego obciążenia zatarcia oraz granicznego nacisku zatarcia. Na podstawie wyników badań tribologicznych wybranych kompozycji smarowych stwierdzono, że dodatek 3% montmorylonitu spowodował znaczne podwyższenie, w porównaniu z kompozycją smarową niezawierającą dodatku modyfikującego, wartości poszczególnych parametrów określających poziom właściwości smarnych badanych kompozycji smarowych.Słowa kluczowe: smar plastyczny, dodatek modyfikujący, montmorylonit, właściwości przeciwzużyciowe, właści-wości przeciwzatarciowe, aparat czterokulowy.The application of montmorillonite as a modified additive of tribological properties of lubricating grease produced from vegetable base of oil The paper presented the results of research of the influence of varying amounts of a modified additive on the tribological properties of selected lubricating compositions. For the study greases based on rapeseed oil were used. Lithium stearate was applied as a thickener of lubricating greases. The lubricating compositions produced in this way were modified by laminated silicates in the form of montmorillonite. To the structure of each grease this additive in the amounts of 1%, 3% and 5% m/m was introduced. Tribological tests were carried out using a four-ball of lubricating grease not containing the modified additive and then were compared with the results obtained for lubricating greases modified with a different amount of laminated silicates. The tribological properties of the tested compositions were determined by measuring the limiting load of wear (G oz /40), welding load (P z ), scuffing load (P t ), limiting load of scuffing (P oz ) and the limiting pressure of seizure (p oz ). On the basis of the tribological research results of selected lubricating compositions it was affirmed, that the addition of 3% montmorillonite resulted in a significant increase in the values of individual parameters determining the level of tribological properties of researched lubricating compositions in comparison with lubricating composition not containing the modified additive.

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Preparation of 12-hydroxystearic acid, the raw material for plastic greases

Cited by 21 publications

References 2 publications

Structural and Thermal Properties of Unpurified and Purified 12-Hydroxystearic Acid Solutions

Structural and Thermal Properties of Unpurified and Purified 12-Hydroxystearic Acid Solutions

Zinc White and the Influence of Paint Composition for Stability in Oil Based Media

Zastosowanie montmorylonitu jako dodatku modyfikującego właściwości tribologiczne smaru plastycznego wytworzonego na bazie roślinnej

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