04-07-2019 дата публикации
Номер: US20190203151A1
Принадлежит:
Provided is a lubricant base stock, a lubricating oil including the lubricant base stock and a method for improving viscosity temperature performance or viscosity index of an engine or other mechanical component lubricated with the lubricating oil. The lubricant base stock includes one or more liquid crystals represented by the formula: 1. A lubricant base stock comprising one or more liquid crystals , wherein the one or more liquid crystals are represented by the formula:{'br': None, 'sub': m', 'n, 'R1-(A)-Y—(B)—R2'}{'sub': 2', '2', '2', '2', '2', '2, 'wherein R1 and R2 are the same or different and are a substituted or unsubstituted, alkyl or alkoxy group having from about 0 to about 24 carbon atoms; A and B are the same or different and are a cycloaliphatic group or aromatic group, provided at least one of A and B is an aromatic group; Y is a covalent bond, —CH—CH—, —CH═CH—, —OCOO—, —COO—, —CO—, —CSO—, —CSS—, —CS—, —O—, —S—, —SO—, —SO—, —CHO—, —OCHO—, —NO—, —ONO, COOH, OH, or —C≡N; and m and n are independently 0, 1, 2 or 3; and'}wherein the lubricant base stock has a kinematic viscosity of 2 cSt to 28 cSt at 40° C. and a kinematic viscosity of 1 cSt to 12 cSt at 100° C., as determined according to ASTM D445.3. The lubricant base stock of claim 1 , wherein the one or more liquid crystals are selected from the group consisting of 4-((1s claim 1 , 4r)-4-pentylcyclohexyl)benzonitrile claim 1 , 4-pentylphenyl 4-(octylocy)benzoate 4-(hexyloxy)phenyl 4-(heptyloxy)benzoate claim 1 , 4-pentylphenyl 4-(heptyloxy)benzoate claim 1 , 4-(hexyloxy)phenyl 4-(heptyloxy)benzoate claim 1 , 4-pentylphenyl 4-heptylbenzoate and combinations thereof.4. The lubricant base stock of claim 1 , wherein the viscosity index of the lubricating oil base stock is greater than 300 at 100° C. as determined according to ASTM D-2270.5. The lubricant base stock of claim 1 , wherein the one or more liquid crystals undergo a liquid crystal phase change at a temperature between −50° C. and 150° C. as ...
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