| 摘要 |
<p>A lubricant for working aluminium comprises an olefin or olefins of formula <FORM:1081135/C4-C5/1> wherein R and R1 are hydrogen or fluorine, R1 may additionally be mono-, di- or trifluoromethyl and R11 is a saturated straight chain alkyl or fluoroalkyl radical having at least 8 carbon atoms. Preferred are straight-chain olefins or fluoro-olefins having 12 to 25 carbon atoms and unsaturation in the 1 or 2 position, and include cetene; 3,3,4-trifluorohexadecene-1; 1,1,1,2-tetrafluorohexadecene-2 and mixtures of olefins derived from the cracking of paraffin or the Fischer-Tropsch process. The olefins may be used by themselves, or with lubricating mineral oils or diesters, or diluted or dissolved in benzene, chlorinated hydrocarbons or kerosene. They may be also used in the form of aqueous emulsions or as greases. The effectiveness of the lubricants is compared with that of saturated compounds, or with compounds wherein the unsaturation is not in the 1- or 2-position.</p> |
