Stable high perfume, low active fabric softener compositions

Cleaning compositions for solid surfaces – auxiliary compositions – Auxiliary compositions for cleaning – or processes of preparing – Textile softening or antistatic composition

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Details

510101, 510102, 510103, 510104, 510105, 510106, 510107, 510524, 510526, 510527, C11D 350, D06M 1346

Patent

active

060228458

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

The subject invention relates to aqueous-based fabric softener compositions having relatively high levels of perfume and low levels of cationic softener active, the compositions being intended for use in the rinse cycle of laundry washing processes. The subject invention also involves concentrates of such compositions, and processes for making such compositions and concentrates.


BACKGROUND OF THE INVENTION

Fabric softening or conditioning compositions, intended for use in the rinse cycle of the laundering process, generally are aqueous dispersions containing a cationic softener as the active material. Known cationic softeners are typically compounds with a positively charged nitrogen atom and at least one hydrophobic long-chain substituent in the molecule. Suitable cationic softeners are mostly quaternary ammonium salts and imidazolinium salts, and to a lesser extent, alkylated partly elthoxylated polyamines, amine amides, ester amines, and di-quaternary compounds.
Fabric softening or conditioning compositions for use in household washing machines during the rinse cycle are marketed extensively. They provide a countering influence on the disorder of the pile of the fibers at the textile surface as well as an electrostatic charge on it by adsorbing on the textile substrate. Such treatment imparts fluffiness to the fabric, and gives a more pleasant sensation when the fabrics are worn next to the skin. The cationic softeners present in these compositions also serve as carriers for perfume, imparting long-lasting freshness to the laundered fabrics.
It is an object of the subject invention to provide low-cost liquid fabric softening compositions having a relatively low level of cationic softener.
It is a further object of the subject invention to provide such compositions which have a relatively high level of perfume to provide desired freshness to laundered fabrics.
It is also an object of the subject invention to provide concentrates of such compositions.
It is also an object of the subject invention to provide such compositions and concentrates with desired high viscosity.
It is also an object of the subject invention to provide such compositions and concentrates which are stable over long periods of time; the compositions and concentrates maintain their desired viscosity and do not separate into discrete hydrophilic and hydrophobic phases.
It is also an object of the subject invention to provide processes for making such compositions and concentrates.


SUMMARY OF THE INVENTION

The subject invention involves single strength liquid fabric softener compositions for use in the rinse cycle of a laundering process, the composition comprising: 5:1; the ratio of cationic softener to nonionic surfactant being from about 1:2 to about 4:1, and the amount of cationic softener plus nonionic surfactant being from about 1% to about 7%. The compositions consist of a liquid aqueous phase with discrete hydrophobic particles dispersed substantially uniformly therein. The compositions preferably have a viscosity of from about 50 cp to about 500 cp.
The subject invention also involves concentrates of such single strength compositions, the concentrates comprising an amount of cationic softener plus nonionic surfactant of up to about 30%, and up to about 10% hydrophobic perfume.
The subject invention also involves processes for making such compositions and concentrates.


DETAILED DESCRIPTION OF THE INVENTION

The subject invention compositions include, at a minimum, a cationic fabric softener, a hydrophobic perfume, a nonionic surfactant, and water. All percentages disclosed herein are weight percent unless otherwise indicated.
The subject invention involves single strength fabric softener compositions. As used herein, "single strength" refers to compositions which are intended for addition to the rinse cycle of the laundering process as is. The subject invention also involves concentrates of such single strength compositions, the concentrates preferably being diluted with water prior to addition to the rin

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