Dicarboxylic acid diesters, notably those prepared from fusel oils

摘要

Novel dicarboxylic acid diesters and admixture thereof have the formula (I):
R1—OOC-A-COOR2  (I)
and are advantageously prepared from fusel oils; these are particularly suited for formulation into useful solvent, cosolvent, stripping, crystallization inhibiting, cleaning and degreasing compositions.

主权项

1. A composition which comprises en admixture of dicarboxylic acid diester compounds having the structural formula (I):
R1—OOC-A-COO—R2  (I)wherein:
the R1 and R2 radicals, which may be identical or different, are each a linear or branched, cyclic or acyclic; C1-C20 alkyl, aryl, alkylaryl or arylalkyl radical, with the proviso that at least one of the R1 and/or R2 radicals is a branched alkyl radical having 5 carbon atoms and/or at least a fraction of the R1 and/or R2 radicals is derived from fusel oil, other than a reaction product of a fusel oil having a boiling point ranging from 100° to 136° C. and of a pure adipic or sebacic acid;wherein said composition comprises:
from 1 to 20% in moles of compounds of formula (I) where A is a group of formula —(CH2)4—, from 45 to 75% in moles of compounds of formula (I) where A is a group of formula —(CH2)3—, and from 15 to 45% in moles of compounds of formula (I) where A is a group of formula —(CH2)2—,and wherein the composition comprises the compounds having the formulae RIAOOC—(CH2)3—COORIA and RIAOOC—(CH2)4—COORIA, RIA, being isoamyl group.