Derivative of bicyclo [2.2.1] heptane, method for its production, and fluid for traction drive
AssigneeIdemitsu Kosan Co., Ltd.
InventorsYukio Yoshida, Toshiyuki Tsubouchi, Motohisa Ido, Hitoshi Hata
Life of this patent
Estimating the term…
Abstract
Derivatives of bicyclo[2.2.1]heptane in the invention have a high traction coefficient under high temperature and an excellent viscosity characteristic under low temperature and are useful for the fluid for a traction drive, and a method in the invention produces such derivatives economically and efficiently.
Claims19
A compound selected from the group consisting of exo-2-methyl-exo-3-methyl-endo-2-[(endo-2-methylbicyclo[2.2.1]hept-exo-3-yl)methyl]bicyclo[2.2.1]heptane, exo-2-methyl-exo-3-methyl-endo-2-[(endo-3-methylbicyclo[2.2.1]hept-exo-2-yl)methyl]bicyclo[2.2.1]heptane, endo-2-methyl-exo-3-methyl-exo-2-[(exo-3-methylbicyclo-[2.2.1]hept-exo-2-yl)methyl]bicyclo[2.2.1]heptane, endo-2-methyl-exo-3-methyl-exo-2-[(exo-2-methylbicyclo[2.2.1]hept-exo-3-yl)methyl]bicyclo[2.2.1]heptane, endo-2-methyl-exo-3-methyl-exo-2-[(endo-3-methylbicyclo[2.2.1]hept-endo-2-yl)methyl]bicyclo[2.2.1]heptane, and endo-2-methyl-exo-3-methyl-exo-2-[(endo-2-methylbicyclo[2.2]hept-endo-3-yl)methyl]bicyclo[2.2.1]heptane.
Exo-2-methyl-exo-3-methyl-endo-2-[(endo-3-methylbicyclo[2.2.1]hept-exo-2-yl)methyl]bicyclo[2.2.1]heptane.
Exo-2-methyl-exo-3-methyl-endo-2-[(endo-2-methylbicyclo[2.2.1]hept-exo-3-yl)methyl]bicyclo[2.2.1]heptane.
Endo-2-methyl-exo-3-methyl-exo-2-[(exo-3-methylbicyclo[2.2.1]hept-exo-2-yl)methyl]bicyclo[2.2.1]heptane.
Endo-2-methyl-exo-3-methyl-exo-2-[(exo-2-methylbicyclo[2.2.1]hept-exo-3-yl)methyl]bicyclo[2.2.1]heptane.
Endo-2-methyl-exo-3-methyl-exo-2-[(endo-3-methylbicyclo[2.2.1]hept-endo-2-yl)methyl]bicyclo[2.2.1]heptane.
Endo-2-methyl-exo-3-methyl-exo-2-[(endo-2-methylbicyclo[2.2.1]hept-endo-3-yl)methyl]bicyclo[2.2.1]heptane.
A mixture of exo-2-methyl-exo-3-methyl-endo-2-[(endo-3-methylbicyclo[2.2.1]hept-exo-2-yl)methyl]bicyclo[2.2.1]heptane and exo-2-methyl-exo-3-methyl-endo-2-[(endo-2-methylbicyclo[2.2.1]hept-exo-3-yl)methyl]bicyclo[2.2.1]heptane.
A mixture of endo-2-methyl-exo-3-methyl-exo-2-[(exo-3-methylbicyclo[2.2.1]hept-exo-2-yl)methyl]bicyclo[2.2.1]heptane and endo-2-methyl-exo-3-methyl-exo-2-[(exo-2-methylbicyclo[2.2.1]hept-exo-3-yl)methyl]bicyclo[2.2.1]heptane.
A mixture of endo-2-methyl-exo-3-methyl-exo-2-[(endo-3-methylbicyclo[2.2.1]hept-endo-2-yl)methyl]bicyclo[2.2.1]heptane and endo-2-methyl-exo-3-methyl-exo-2-[(endo-2-methylbicyclo[2.2.1]hept-endo-3-yl)methyl]bicyclo[2.2.1]heptane.
A method for preparing a bicyclo[2.2.1]heptane derivative represented by the following formula
- wherein m represents 2 or 3 and n represents 1 or 2, the method comprising dimerizing a methylene- and methyl-substituted bicyclo[2.2.1]heptane ring compound and/or a methyl-substituted bicyclo[2.2.1]heptene ring compound in the presence of an acid catalyst at a temperature of 60° C. or lower and hydrogenating the produced dimer in the presence of a hydrogenation catalyst at a temperature of 200-300° C.
A fluid for a traction drive consisting of a synthetic oil having the following physical properties:
- (1) a molecular weight of at least 210;
- (2) a kinematic viscosity at 40° C. of 10-25 m2/s;
- (3) a viscosity index of at least 60;
- (4) a pour point of no more than −40° C.;
- (5) a density at 20° C. of at least 0.93 g/cm3;
- and
- (6) a traction coefficient at 140° C. that is at least 90% of the traction coefficient of 2,4-dicyclohexyl-2-methylpentane.
A fluid for a traction drive consisting of a derivative of bicyclo[2.2.1]heptane represented by the following formula
- wherein m represents 2 or 3 and n represents 1 or 2.
Dependencies are inferred from the claim text.