| abstract |
A synthetic ester composition exhibiting low odor, and high thermal and oxidative stability which comprises the reaction product of: (a) a polyol which comprises at least dipentaerythritol, e.g., technical grade pentaerythritol and mixtures of technical grade pentaerythritol or dipentaerythritol and monopentaerythritol; and (b) a mixture of monocarboxylic acids comprising at least one linear acid selected from the group consisting of between C5-C10 acids and at least one branched acid selected from the group consisting of C7-C9 acids, wherein the amount of C5 and C6 acids is between about 20 to 45 weight %, based upon the total amount of said mixture of monocarboxylic acids, and wherein said synthetic ester composition has a viscosity of at least 4 cSt at 99 °C, a viscosity of less than about 8,000 cSt at -40 °C, and a pour point of at least as low as -54 °C. |