14-03-2013 дата публикации
Номер: US20130065805A1
The invention relates to an improved food-grade-lubricant useful as hydraulic oil, circulating oil, drip oil, general purpose oil, grease base oil, cable oil, chain oil, spindle oil, gear oil, and compressor oil for equipment in the food service industry. Specifically, it relates to a composition comprising at least one polyalphaolefin base fluid, at least one food grade polyolester base fluid, and at least one food grade performance additive. 1. A food grade lubricant composition comprising:(a) at least one polyalphaolefin base fluid;(b) at least one food grade polyolester base fluid; and(c) at least one food grade performance additive.2. The composition of wherein the composition is more than 5 percent by weight polyolester base fluid.3. The composition of wherein component (c) comprises the combination of (i) one or more food grade antioxidants and (ii) one or more food grade metal passivators claim 1 , wherein the metal passivator may comprise a metal deactivator claim 1 , a corrosion inhibitor claim 1 , or combinations thereof.4. The composition of wherein the composition has a kinematic viscosity from 30 to 320 cSt at 40° C.5. The composition of claim I wherein:component (a) is present from at least 1 percent by weight;component (b) is present from at least 5 percent by weight; andcomponent (c) is present from 0.01 to 6 percent by weight.6. The composition of wherein component (a) has a number average molecular weight of 425 to 2500.7. The composition of wherein component (a) claim 1 , the polyalphaolefin base fluid claim 1 , comprises PAO2 claim 1 , PAO4 claim 1 , PAO6 claim 1 , PAO8 claim 1 , PAO10 claim 1 , PAO40 claim 1 , PAO100 or mixtures thereof.8. The composition of claim I wherein component (b) claim 1 , the polyolester base fluid base fluid claim 1 , comprises: esters of neopentyl glycol claim 1 , glycerol claim 1 , trimethylol propane claim 1 , pentaerythritol claim 1 , dipentaerythritol claim 1 , tripentaerythritol claim 1 , carboxylic acids ...
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