| 摘要 |
The invention relates to the use of one or more liquids of the general formula I and/or II <IMAGE> where R1 is ethyl or hydrogen, R2 is ethyl, R3 is methyl and R4 is a benzyl radical, as heat transfer liquid, it being possible for the liquids additionally to contain compounds of the general formulae III and/or IV with the stated meanings for R1 to R4: <IMAGE> |
