| 摘要 |
An aqueous rinse cycle fabric softening composition is provided containing a n esterquat softening compound which remains physically stable and which is characterized by a stable viscosity over a wide range of ambient temperature s and for extended periods of time which composition comprises: (a) from about 1 % to about 25 % by weight, of a biodegradable fatty ester quaternary ammoniu m compound derived from the reaction of an alkanol amine and a fatty acid derivative followed by quaternization, said fatty ester quaternary ammonium compound being represented by the formula: (I) wherein Q represents a carbox yl group having the structure -OCO- or -COO-; R1 represents an aliphatic hydrocarbon group having from 8 to 22 carbon atoms; R2 represents - Q-R1 or - OH; q, r, s and t, each independently represent a number of from 1 to 3; and X- a is an anion of valence a; and wherein the normalized percentage of monoest er compound in said fatty ester quaternary ammonium compound is from 28 % to 39 %; the normalized percentage of diester compound is from 52 % to 62 % and th e normalized percentage of triester compound is from 7 % to 14 %; all percentages being by weight; and (b) from about 0.001 % to about 2 %, by weight, of a sequestering agent.
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