Patent ID: 7078374

Claim:
A method for preparing a fabric conditioning composition comprising mixing with water: (a) 7.5 to 60% by weight of a cationic fabric softening compound of formula (I), (II) or (III): wherein each R is independently selected from a C 5-35 alkyl or alkenyl group, R 1 represents a C 1-4 alkyl, C 2-4 alkenyl or a C 1-4 hydroxyalkyl group, n is O or a number selected from 1 to 4, m is 1, 2 or 3 and denotes the number of moieties to which it relates that pend directly from the N atom, and X − is an anionic group; wherein each R 1 group is independently selected from C 1-4 alkyl, hydroxyalkyl or C 2-4 alkenyl groups; and wherein each R 2 group is independently selected from C 8-28 alkyl or alkenyl groups; n is 0 or an integer from 1 to 5 and T and X − are as defined above; wherein each R 1 group is independently selected from C 1-4 alkyl, or C 2-4 alkenyl groups; and wherein each R 2 group is independently selected from C 8-28 alkyl or alkenyl groups; n is 0 or an integer from 1 to 5 and T and X − are as defined above; the compound having one or more hydrocarbyl chains formed from parent fatty acyl compounds or fatty acids having an iodine value of from 0 to 20; and (b) 0.01%–1.5% by weight of a nonionic surfactant viscosity modifier; and (c) about 0.01% to about 1.4% by weight of a fatty alcohol; wherein said fatty alcohol is un-alkoxytated and contains about 15 to about 22 carbon atoms in a hydrocarbyl chain; wherein the combination of (b) and (c) is no more than 1.5% by weight, based on the total weight of the composition; and wherein components (a), (b) and (c) are mixed to form an aqueous dispersion, the aqueous dispersion being subjected to high-shear below the phase transition temperature of component (a) for a time sufficient to provide a composition having a viscosity of from 10 to 250 mPa·s measured at 20 s −1 using a Haake MV1 Rotoviscometer at 25° C.