26-08-2021 дата публикации
Номер: US20210261880A1
Принадлежит:
Described herein is a stabilized lubricant composition for use in steel casting, in particular in continuous casting processes. In particular, the lubricant composition for processes for producing steel by continuous casting includes a dispersion of a lubricant powder, for an ingot mold, in continuous casting, in an oily liquid means, and a stabilization additive, characterized in that it has the following shear thinning index values: 2. The lubricant composition according to claim 1 , wherein the stabilization additive is selected from:Organic additives including:secondary or tertiary amines with C4-C18 chains,amides or imides with C4-C18 chains,esters of mono- or di-carboxylic acids with C4-C18 chains with alcohols or polyols with C4-C18 chains,mono- or poly-carboxylic acids with C4-C18 chains,Salts of one or more of the aforesaid compounds; andamino acids and peptides up to 10 amino acidic units,Inorganic additives including:oxides or hydroxides of transition metals,carbonates or hydrogen carbonates of alkaline or alkaline earth metals,silica, alumina, silicates, aluminosilicates, fluoro silicates, phosphosilicates, andcarbon allotropes,and wherein the inorganic additives have a granulometry within the range of 1 nm-100 microns.3. The lubricant composition according to claim 2 , wherein the stabilization additive is selected from trihexylamine and titanium dioxide with a main particle size of about 20 nm.4. The lubricant composition according to claim 1 , wherein the stabilization additive is used in a concentration from 0.05% to 10% in mass with respect to the oil mass.5. The lubricant composition according to claim 1 , wherein the oily liquid means is selected from or comprises glyceric esters of fatty acids and/or poly-α-olefins.6. The lubricant composition according to claim 1 , wherein the oily liquid means has a kinematic viscosity claim 1 , μ claim 1 , from 25 to 150 mm/s at 40° C. (ASTM D445 claim 1 , gravimetric method with capillary viscometer) and a ...
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