Compositions – Textile processing aid compositions – or processes of preparing – For textile materials consisting wholly or in part of silk...
Patent
1993-12-10
1996-01-16
Lieberman, Paul
Compositions
Textile processing aid compositions, or processes of preparing
For textile materials consisting wholly or in part of silk...
252 86, 252 89, 25217421, D06M 1317, D06M 13352, D06M 1346
Patent
active
054845408
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to fabric softeners. The compositions according to the invention are concentrated fabric softening compositions which retain viscosity upon dilution.
BACKGROUND
Concentrated fabric softening compositions have been extensively described in the art, and one aspect which has often been discussed is the viscosity of these concentrated compositions; indeed these concentrated compositions are typically extremely viscous and the prior art has often described means by which the viscosity of these concentrated compositions could be controlled or decreased. One aspect which has been much less dealt with is the viscosity of these concentrated compositions upon dilution; indeed it has been observed that the viscosity of such concentrated compositions dramatically drops upon dilution, and this viscosity loss is clearly undesirable, essentially in terms of consumer acceptance.
It is therefore an object of the present invention to provide a concentrated fabric softening composition which has an acceptable viscosity in the concentrated form, and which retains acceptable viscosity after it has been diluted.
This technical problem was discussed in GB 2 007 734 which proposes to use a combination of a fatty quaternary ammonium salt having two long chain alkyl groups together with an oily substance.
Concentrated fabric softeners have been described for instance in EP 56 695, EP 13 780, DE 26 31 114 and EP 60 003, and a process for the preparation of concentrated fabric softening compositions is disclosed in EP-A-316 996.
SUMMARY OF THE INVENTION
It has now been found that the above object can be achieved by formulating a concentrated fabric softening composition comprising from 10% to 35% by weight of a cationic fabric softening active, said composition further comprising: ethoxylate of the formula RO(Etox).sub.n, wherein R is a linear C.sub.8 -C.sub.18 alkyl chain, and n representing the weighted average ethoxylation degree is of from 3 to 35, or mixtures thereof; hydrophilic polymer, or mixtures thereof; alcohol having from 8 to 18 carbon atoms, or mixtures thereof; polydialkylsiloxane of the formula ##STR1## wherein R is a C.sub.1 -C.sub.5 alkyl chain, and m is an integer of from 1 to 500, or mixtures thereof.
The present invention also encompasses a method for the softening of fabrics, wherein the above concentrated compositions are diluted in water before they are contacted with said fabrics in the rinse water.
DETAILED DESCRIPTION OF THE INVENTION
The compositions according to the invention are concentrated fabric softeners; by concentrated, it is meant that the compositions comprise from 10% to 35% by weight of the total composition of a cationic fabric softening active or mixtures thereof, preferably 15% to 25%. By cationic, it is meant any softening compound which is in cationic form in the concentrated softening composition. Suitable cationic fabric softening actives include ##STR2## wherein R.sub.2 is an acylic aliphatic C.sub.15 -C.sub.22 hydrocarbon group which may be interrupted by ester groups, R.sub.3 is a C.sub.1 -C.sub.4 saturated alkyl or hydroalkyl group, R.sub.4 is selected from R.sub.2 and R.sub.3, and A is an anion; rapidly biodegradable compounds of formula (i) where R.sub.2, and possibly R.sub.4, are interrupted by ester groups, are disclosed in EPA 239 910; ##STR3## wherein R is an acyclic aliphatic C.sub.15 -C.sub.22 hydrocarbon group, R.sub.2 is a divalent alkylene group having 1 to 3 carbon atoms, R.sub.5 and R.sub.8 are C.sub.1 -C.sub.4 saturated alkyl or hydroxyalkyl groups, and A.sup.- is an anion: ##STR4## wherein n is an integer of from about 1 to about 5, and R.sub.1, R.sub.2, R.sub.5 and A.sup.- are as defined above. ##STR5## wherein R.sub.1 =C.sub.15 -C.sub.17 saturated alkyl, R.sub.2 =C.sub.1 -C.sub.4 saturated alkyl, Z=NH or O, and A.sup.- is an anion.
Examples of Component (i) are the well-known dialkyldimethylammonium salts such as ditallowdimethylammonium chloride (DTDMAC), ditallowdimethylammonium methylsulfate, di(hydrogenated
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Aylor Robert B.
Lieberman Paul
The Procter & Gamble & Company
Tierney Michael P.
Zea Betty J.
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