| http://www.w3.org/ns/prov#value | - The sulfurized esters are known in the art and may be prepared, for example from aliphatic olefinic acids and alcohols and polyols such as methanol, ethanol, n- or isopropanol, n-, iso-, sec-, or glycol, propylene glycol, trimethylene glycol, neopentyl glycol, glycerol, etc.
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