| 摘要 |
A method of preparing a fabric softening material which comprises a quaternary ammonium material and at least on C8-28 alkyl or alkenyl group connected to the molecule via an ester linkage, said method comprising the step of reacting a base material with an alkyl or alkenyl group containing material, such that at least one alkyl or alkenyl group is connected to the base material via an ester linkage, wherein the reaction between the base material and the alkyl or alkenyl group containing material is carried out in the presence of an excess of alkyl or alkenyl groups, said excess being effective to lower the pour point of the softener material.
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