Lubricant composition and analysis method for same
OwnerFumiyo Tojou, Kaoru Matsuokainventors
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Abstract
A lubricant composition is provided, wherein a base oil of the lubricant is a single ester having a chemical structure of (chemical formula 15) where an integer n is any of 7, 8 or 9, wherein at least one antioxidant of hindered phenol-based antioxidants, including at least one (3,5-di-tert-butyl-4-hydroxyphenyl), and hindered amine based antioxidants is included, wherein a triglyceride represented by the structure of (chemical formula 16) where R1, R2 and R3 are unsaturated or saturated straight chain structures or branched structures formed of CxHyOz is included and wherein the viscosity characteristics are no greater than 48 mPa·s at 40° C. 1
Claims35
A lubricant composition comprising a base oil which is a single ester having the following chemical structure of:
- 15
- wherein n is any of 7, 8 or 9 and the viscosity characteristics thereof are no greater than 48 mPa·s at 0° C. and no greater than 12 mPa·s at 40° C.
A lubricant composition comprising a base oil which is a single ester having the following chemical structure of:
- 16
- wherein n is any of 7, 8 or 9, and
- wherein at least one antioxidant of hindered phenol-based antioxidants including at least one (3,5-di-tert-butyl-4-hydroxyphenyl) and hindered amine-based antioxidants is further included, and
- wherein a triglyceride represented by the following chemical structure of:
- 17
- is further included;
- where R1, R2 and R3 are unsaturated or saturated straight chain structures or branched structures formed of CxHyOz.
A lubricant composition comprising a base oil which is a single ester having the following chemical structure of:
- 18
- and
- a mixed antioxidant formed of a hindered phenol-based antioxidant including at least one (3,5-di-tert-butyl-4-hydroxyphenyl) and a hindered amine-based antioxidant
A lubricant composition, wherein the secondary ion intensity has peaks at “127,” “213” and “357” of the mass numbers of positive secondary ions per unit charge when a base oil included in the lubricant is analyzed by means of secondary ion mass spectrometry.
A lubricant composition, wherein the secondary ion intensity has peaks at “141,” “227” and “385” of the mass numbers of positive secondary ions per unit charge when a base oil included in the lubricant is analyzed by means of secondary ion mass spectrometry.
A lubricant composition, wherein the secondary ion intensity has peaks at “155,” “241” and “413” of the mass numbers of positive secondary ions per unit charge when a base oil included in the lubricant is analyzed by means of secondary ion mass spectrometry.
An analysis method of a lubricant composition for analyzing a base oil included in a lubricant by means of secondary ion mass spectrometry for determining whether or not a peak of the secondary ion intensity exists at “127,” “213” and “357” of the mass numbers of positive secondary ions per unit charge in a mass spectrum and for identifying a lubricant wherein the peak exists at said mass numbers as a lubricant having a single ester having the following chemical structure:
- 21
- as a base oil.
An analysis method of a lubricant composition for analyzing a base oil included in a lubricant by means of secondary ion mass spectrometry, for determining whether or not a peak of the secondary ion intensity exists at “141,” “227” and “385” of the mass numbers of positive secondary ions per unit charge in a mass spectrum and for identifying a lubricant wherein the peak exists at said mass numbers as a lubricant having a single ester having the following chemical structure:
- 22
- as a base oil.
An analysis method of a lubricant composition for analyzing a base oil included in a lubricant by means of secondary ion mass spectrometry, for determining whether or not a peak of the secondary ion intensity exists at “155,” “241” and “413” of the mass numbers of positive secondary ions per unit charge in a mass spectrum and for identifying a lubricant wherein the peak exists at said mass numbers as a lubricant having a single ester having the following chemical structure:
- 23
- as a base oil.
A deterioration analysis method for a lubricant composition, wherein a lubricant composition in an initial condition is analyzed by means of secondary ion mass spectrometry so as to find the secondary ion intensities at “127,” “213” and “357” of the mass numbers of positive secondary ions per unit charge in a mass spectrum and the lubricant composition after the utilization for a predetermined period of time is analyzed in the same manner so as to find the secondary ion intensities at the same mass numbers and wherein a ratio of a secondary ion intensity of said initial condition to a secondary ion intensity after said utilization is found so as to evaluate a deterioration condition of said lubricant composition.
A deterioration analysis method for a lubricant composition, wherein a lubricant composition in an initial condition is analyzed by means of secondary ion mass spectrometry so as to find the secondary ion intensities at “141,” “227” and “385” of the mass numbers of positive secondary ions per unit charge in a mass spectrum and the lubricant composition after the utilization for a predetermined period of time is analyzed in the same manner so as to find the secondary ion intensities at the same mass numbers and wherein a ratio of a secondary ion intensity of said initial condition to a secondary ion intensity after said utilization is found so as to evaluate a deterioration condition of said lubricant composition.
A deterioration analysis method for a lubricant composition, wherein a lubricant composition in an initial condition is analyzed by means of secondary ion mass spectrometry so as to find the secondary ion intensities at “155,” “241” and “413” of the mass numbers of positive secondary ions per unit charge in a mass spectrum and the lubricant composition after the utilization for a predetermined period of time is analyzed in the same manner so as to find the secondary ion intensities at the same mass numbers and wherein a ratio of a secondary ion intensity of said initial condition to a secondary ion intensity after said utilization is found so as to evaluate a deterioration condition of said lubricant composition.
Dependencies are inferred from the claim text.