Fabric conditioning compositions and process for making them
AssigneeLever Brothers Company, Division of Conopco, Inc.
InventorsHerbert E. Bauer, Michael G. Clarke, John E. Lovas, William R. Narath, Andrew N. Williams
Life of this patent
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Abstract
An aqueous fabric conditioning composition comprising a homogeneous dispersion of fabric conditioning active particles having a size distribution such that the particles have a mean size of about 0.7 to 10 microns as measured by Malvern Particle Size Analyzer and preferably have 10% of the distribution with a particle size of at least 23% of the mean particle size. A second aspect of the invention relates to a continuous process for making the aqueous fabric conditioning composition.
Claims3
A continuous process for making an aqueous fabric conditioning composition comprising from 8% to 80% by weight of a cationic fabric conditioning agent and from 0.01% to 0.5% of an ionizable salt said process comprising the steps of:
- (i) selecting a cationic fabric conditioning active of formula ##STR5## wherein R.sub.1 and R.sub.2 are each hydrocarbyl groups containing from about 1 to about 25 carbon atoms, R.sub.3 and R.sub.4 are each hydrocarbyl groups containing from 1 to about 6 carbon atoms, X is an anion and n is an integer from 1 to about 3
- (ii) adding the active to a continuous mixer,
- (iii) dispersing the active in water under controlled shear in the continuous mixer to form a homogeneous dispersion of the active,
- (iv) mixing the dispersion with 3 or more discrete portions of the ionizable salt added sequentially with about 4 or more seconds between the addition of each discrete portion under controlled shear to maintain the homogenous dispersion.
Dependencies are inferred from the claim text.