| 摘要 |
THE INVENTION RELATES TO COMPOSITIONS COMPRISING AN ESTER OF A POLYOL AND A MIXTURE OF FATTY ACIDS, WHEREIN AT LEAST A PART (I) OF THE ESTERIFIED FATTY ACIDS HAS A CHAIN LENGTH OF 5-12 CARBON ATOMS AND ANOTHER PART (II) OF THE ESTERIFIED FATTY ACIDS HAS A CHAIN LENGTH OF 16-22 CARBON ATOMS, AND WHEREIN THE COMPOSITION HAS A VISCOSITY OF 7000 MM2/S OR LESS, WHEN TESTED ACCORDING TO ASTM (02531). SUCH COMPOSITIONS HAVE UNEXPECTED GOOD LOW TEMPERATURE PROPERTIES, IN PARTIULAR A GOOD RHEOLOGY AFTER HAVING BEEN KEPT FOR A PROLONGED TIME AT A LOW TEMPERATURE (E.G. AT -30ºC). THESE COMPOSITIONS ARE SUITABLE FOR USE AS (PART OF) HYDRAULIC FLUID IN APPLICATIONS AT LOW TEMPERATURES.
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