Liquid paraffin

About: Liquid paraffin is a research topic. Over the lifetime, 6185 publications have been published within this topic receiving 52956 citations.

Solid air-improving composition

Abstract: A solid air-improving composition comprising a carrier material, a volatile active material gradually evaporating therefrom and a gel formed by a paraffin component and a gelifying metal soap is improved by providing a deodorant agent or an odorant agent or a mixture of these agents as said active material, a liquid paraffin having at 20° C an evaporation number ranging from 8 to 1000 based on the evaporation number at 20° C of diethyl ether being equal one, constituting the paraffin component, the metal soap constituting the non-evaporating carrier material proper, and water in an amount sufficient for complete gelling of the metal soap and liquid paraffin; the active agent evaporates from the composition with preservation of the outer appearance of the latter but with shrinkage of its volume.

Tribological properties of P‐ and N‐containing organic compounds as potential extreme‐pressure and antiwear additives

Abstract: An amine salt of an alkoxylphosphate (a P- and N-containing organic compound, PN) was synthesised. Its extreme-pressure, antiwear, and friction-reducing properties were evaluated as an additive in liquid paraffin and a mineral oil. Tests were performed on a four-ball friction and wear tester with an AISI 52100 steel ball self-mated pair and the results were compared with those of sulphurised olefin (SO), zinc di-n-butyldithio-phosphate (ZDDP), and dibutylphosphite (DBP). The morphologies of the worn steel surfaces were observed using a scanning electron microscope, while the binding energies of some typical elements on the worn surfaces were determined using X-ray photoelectron spectroscopy. The additives were found to increase the load-carrying capacity and to reduce wear and friction coefficient considerably. PN as an additive exhibits better load-carrying, antiwear, and friction-reducing properties than SO, ZDDP, and DBP under the same test conditions.

Antipruritic compositions and plasters

Abstract: An antipruritic plaster comprising a backing having formed on one surface thereof a pressure-sensitive adhesive medicament layer containing (1) at least one medicament selected from glycyrrhetinic acid esters thereof, glycyrrhizin, and salts of glycyrrhizin; (2) at least one solvent for (1) selected from benzyl alcohol, phenethyl alcohol, diphenhydramine, chlorpheniramine, N-methyl-2-pyrrolidone, crotamiton, and lauric acid diethanolamide, and (3) a base comprising [a] at least one rubber compound adhesive plaster base selected from natural rubber, styrene-butadiene copolymer elastomers, and styrene-isoprene-styrene copolymer elastomers; at least one tackifying agent selected from petroleum resin, rosin, hydrogenated rosin, polybutene, and ester gum; and at least one softener selected from polybutene, liquid paraffin, higher fatty acid esters, silicone oils, and vegetable oils or [b] acrylic resin.

Investigation of wax-based barite slurry and deposition for 3D printing landslide model

Abstract: Deposition-based 3D printing has been proposed as a novel method for building the landslide model, especially its porous slide zone, to accurately mimic equivalent material properties and porous structure, which has been not yet achieved by traditional the manual or semi-auto compacting method. As an initial attempt, this research firstly selects barite powder and its wax additive formula for 3D slurry deposition, manipulating the relationship between the stress field control and the porosity of forming materials. It finds that the binder additive formulation of liquid paraffin 3 wt.%, solid paraffin 12 wt.%, stearic acid 1.8 wt.%, palm wax 4.8 wt.% could provide best dispersion of barite powder for slurry deposition. The additive binder with over 20 wt.% enables the proper 3D slurry deposition process, proving the capability of build landslide model via layer-by-layer forming process. The well-dispersed stable barite slurry paste is able to provide better mechanical properties for 3D formed parts. The sintering of the various slurry specimens could reach compressive strength up to 2.7 MPa as well as offer the strength lower than 0.5 MPa, providing wide range of mechanical property. Besides, the removal of wax additive binder during the sintering process enables the formation of well-distributed micro pores, which could assist in mimicking the material structure of weak slip zone. Hence, this study has achieved a combined development of material formulation, 3D printing slurry deposition and sintering approach, showing great potential to achieve synchronous controlling of material properties such as stress and seepage field in the 3D printed landslide model.