|Publication number||US3928213 A|
|Publication date||Dec 23, 1975|
|Filing date||Jun 29, 1973|
|Priority date||Mar 23, 1973|
|Also published as||CA1024703A, CA1024703A1, CA1027713A, CA1027713A1, DE2413042A1, DE2413042B2|
|Publication number||US 3928213 A, US 3928213A, US-A-3928213, US3928213 A, US3928213A|
|Inventors||Heuring Vincent Paul, Prentice James Bruce, Temple Robert Dwight|
|Original Assignee||Procter & Gamble|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (8), Referenced by (23), Classifications (15)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent [191 Temple et a1.
[ Dec. 23, 1975 FABRIC SOFIENER AND SOIL-RELEASE COMPOSITION AND METHOD  Inventors: Robert Dwight Temple; Vincent Paul Heuring, both of Cincinnati, Ohio; James Bruce Prentice, Batesville, Ind.
 Assignee: The Procter & Gamble Company, Cincinnati, Ohio  Filed: June 29, 1973 ] Appl. No.: 375,218
Related US. Application Data  Continuation-impart of Ser. No. 344,389, March 23,
 US. Cl. 252/8.8; 106/186; 252/8.75; 252/89 [51.] Int. Cl. D06M 13/46  Field of Search..... 252/88, 8.75, 8.9, DIG. l5, 252/547; 117/139.5 C, 139.5 CQ, 139.5 F;
 References Cited UNITED STATES PATENTS 3,211,660 10/1965 Marion et a1. 252/529 3,254,028 5/1966 Wixon 252/524 X 3,364,142 1/1968 Buck 252/88 3,380,850 4/1968 Jones etal. 117/1395 X 3,632,419 l/l972 l-lorie 252/88 X 3,644,203 2/1972 Lamberti et al. 252/88 X 3,712,873 l/l973 Zenk. 252/89 X 3,756,950 9/1973 Gluck 252/88 Primary Examiner-Herbert B. Guynn Attorney, Agent, or FirmRichard C. Witte; Thomas H. OFlaherty, Jack D. Schaeffer  Y ABSTRACT 10 Claims, No Drawings FABRIC SOFIENER AND SOIL-RELEASE COMPOSITION AND METHOD CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation-in-part application of application Ser. No. 344,389, filed Mar. 23, 1973,
BACKGROUND OF THE INVENTION This invention relates to fabric conditioning compositions and to a method of conditioning textile materials. More particularly, it relates to compositions adapted to the provision of fabric softening and antisoiling properties and useful in the repetitious but generally discontinuous laundering process which involves soiling, laundering, rinsing, soiling, etc.
The use of various chemical agents to provide textile materials with a variety of fabric surface modifications has been known in the art. A fabric modification of universal preference and of widespread practice in home laundering operations has been the improvement of the softness or hand of laundered textiles. Fabric softening compositions useful for this purpose have for the most part been liquid fabric softener compositions containing in a water vehicle a quaternary ammonium salt component having an affinity for negativelycharged fibers and having at least one long chain alkyl moiety of from 16 to 20 carbon atoms. These compositions have been largely adapted for use in the final rinsing bath of the home laundering process. It has been found that the treatment of textile materials in such manner improves the softness or feel of the treated fabrics, prolongs the useful life of the textile materials and reduces the tendency of the fabrics to accumulate electrical charges.
While the inclusion of other fabric conditioning agents, such as anti-soiling agents, into known softener compositions for the simultaneous provision of additional fabric conditioning effects is frequently desirable, such inclusion is often at the expense of one or more of the desirable attributes of these softener compositions. For example, certain polymeric materials useful in providing treated textiles with improved antisoiling properties are incompatible with liquid fabric softening compositions to the extent that their inclusion contributes to undesirable thickening or viscosity increases. High viscosity in such compositions tends to make the compositions ditficultly pourable and decreases ready solubility of the compositions in a fabric rinsing bath.
It is an object of this invention to provide compositions useful for imparting softness and anti-soiling properties to treated fabrics.
It is another object of this invention to provide fabric softener compositions which contain an anti-soiling agent and which are characterized by desirable viscoslty.
Another object, of the invention is to provide a method whereby fabrics can be effectively softened and rendered anti-soiling by treatment in a laundry rinsing operation.
2 These and other objects of the invention will become apparent from the description appearing hereinafter.
SUMMARY OF THE INVENTION The present invention is based in part upon the discovery that fabrics can be improved in feel by treating the fabrics in anaqueous rinsing bath containing a cationic fabric softening agent and a minor amount of an hydroxyalkyl alkyl cellulose or alkyl cellulose antisoiling agent. In its composition aspect, the present invention providesan aqueous fabric softener composition consisting essentially of A. from 2% to 15% of a cation-active fabric softening compound having from one to two straight chain organic groups of from 8 to 22 carbon atoms;
B. from 0. l% to 10% of an anti-soiling agent selected from the group consisting of hydroxyalkyl alkyl cellulose and alkyl cellulose where each alkyl has from 1 to 3 carbon atoms, said anti-soiling agent having a viscosity of less than about 400 centipoises as determined at a 2% by weight concentration in water and at 20C;
C. from 0 to about 2% of an emulsifier selected from the group consisting of l) the condensation product of one mole of alkylphenol wherein the alkyl chain contains from about 8 to about 18 carbon atoms with from about one to about moles of ethylene oxide, (2) the condensation product of one mole of an aliphatic alcohol wherein the alkyl chain contains from about 10 to about 24 carbon atoms with from about one to about 100 moles of ethylene oxide, (3) polyethylene glycols having a molecular weight of from about 1400 to about 30,000, and (4) mixtures thereof; and
D. the balance water.
In its method aspect, the present invention provides a method of simultaneously imparting softening and antisoiling properties to washed textiles which comprises treating previously-washed textiles in an aqueous rinsing bath containing minor but effective amounts of a cation-active fabric softening agent having from one to two straight chain organic groups of from 8 to 22 carbon atoms and an anti-soiling agent as hereinbefore defined.
The compositions of this invention provide fabricsoftening properties to treated textiles and anti-soiling effects by the application of anti-soiling agent, e.g., hydroxypropyl methyl cellulose, onto the treated fabrics from an aqueous rinsing bath of a laundering process. The compositions are sufficiently fluid as to permit ready measurement, pouring and dispersibility in water.
DETAILED DESCRIPTION OF THE INVENTION The cation-active organic fabric-softener compounds, which are the principal fabric-softening components of the compositions of the invention, are known fabric-softening compounds. Generally, these comprise cationic nitrogen-containing compounds such as quaternary ammonium compounds and amines and have one or two straight-chain organic groups of at least eight carbon atoms. Preferably, they have one or two such groups of from 12 to 22 carbon atoms. Preferred cation-active softener compounds include the quaternary ammonium softener compounds corre sponding to the formula wherein R'is hydrogen or an aliphatic group of from 1 to 22 carbons; R is an aliphatic group having from 12 to 22 carbon atoms; and X is an anion selected from halogen, acetate phosphate, nitrate and methyl sulfate radicals.
Because of their excellent softening efficacy and ready availability, preferred cationic softener compounds of the invention are the dialky! dimethyl ammonium chlorides, wherein the alkyl groups have from 12 to 22 carbon atoms and are derived from long'chain fatty acids, such as hydrogenated tallow. As employed herein, alkyl is intended as including unsaturated compounds such as are present in alkyl groups derived from naturally occurring fatty oils. The term tallow refers to fatty alkyl groups derived from tallow fatty acids. Such fatty acids give rise to quaternary softener compounds wherein R and R have predominantly from 16 to 18 carbon atoms. The term coconut" refers to fatty acid groups from coconut oil fatty acids...The coconutalkyl R and R groups have from about 8 to about 18 carbon atoms and predominate in C to C alkyl groups. Representative examples of quaternary softeners of the invention include tallow trimethyl ammonium chloride; ditallow dimethyl ammonium chloride; ditallow dimethyl ammonium methyl sulfate; dihexadecyl dimethyl ammonium chloride; di(hydrogenated tallow) dimethyl ammonium chloride; dioctadecyl dimethyl ammonium chloride; dieicosyl dimethyl ammonium chloride; didocosyl dimethyl ammonium chloride; di(hydrogenated tallow) dimethyl ammonium methyl sulfate; dihexadecyl diethyl ammonium chloride; dihexadecyl dimethyl ammonium acetate; ditallow dipropyl ammonium phosphate; ditallow dimethyl ammoniuni' nitrate; di(coconutalkyl) dimethyl ammonium chloride.
An especially preferred class ,of quaternary ammonium softeners of the invention corresponds to the formula RI cH, T cH, x 1
wherein R and R are each straight chain aliphatic groupsof from 12 to 22 carbon atoms and X is halogen,
e.g., chloride. Especially preferred are ditallow dimethyl ammonium chloride, di(hydrogenated tallowalkyl) dimethyl ammonium chloride and di(coconut- 4 pylene diamine; soya 1,3-propylene diamine and the like.
Other suitable cation-active softener compounds herein are the quaternary imidazolinium salts. Preferred salts are those conforming to the formula wherein R is an alkyl containing from 1 to 4, preferably from 1 to 2, carbon atoms, R is an alkyl containing from 1 to 4 carbon atoms or a hydrogen radical, R is an alkyl containing from 8 to 22, preferably at least 15, carbon atoms, R,, is hydrogen or an alkyl containing from 1 to 22, preferably at least 15, carbon atoms, and X is an anion, preferably methyl sulfate or chloride ions. Other suitable anions include those disclosed with reference to the cationic quaternary ammonium fabric softeners described hereinbefore. Particularly preferred are those imidazolinium compounds in which both R and R are alkyls of from 12 to 22 carbon atoms, e. g., l-methyll stearoylamide )ethyl ]-2-heptadecyl-4,5-dihydroimidazolinium methyl sulfate; 1- methyl- 1 palmitoylamide )ethyl 2-octadecyl-4,5 dihydroimidazolinium chloride.
Other cationic quaternary ammonium fabric softeners, which are useful herein include, for example, alkyl (C, to C )-pyridinium chlorides, alkyl (C to C alkyl (C to C;,)-morpholinium chlorides, and quaternary derivatives of amino acids and amino esters.
The cationic fabric softeners mentioned above can be used singly or in combination in the practice of the present invention. The cationic fabric softener comprises from about 2% to about 15% by weight of the total composition. If more than about 15% is used, product stability problems may occur, e.g., thickening and the possible formation of an undesired gel and if less than about 2% is used, the softener will be too dilute and desired softening of the fabrics will not be achieved when conventional amounts of the composition are added to the wash water. Within the above range, the actual amount of fabric softener which is contained in the composition depends upon the desired usage concentration of the composition in a laundering process. A desired concentration of the fabric softener in the rinsing solution is from about 25 ppm to about 100 ppm. To achieve the desired results of the present invention the preferred range of cationic fabric softener in the rinsing solution is from about 35 ppm to about ppm. To achieve the desired results of the present invention the preferred range of cationic fabric softeper is from about 2.5% to about 6% by weight of the total composition.
The anti-soiling agents suitable for use in the compositions of the present invention include hydroxyalkyl alkyl cellulose and alkyl cellulose where the alkyl in each instance has from 1 to 3 carbon atoms. These anti-soiling agents are derived from cellulose and can be described as cellulose having substituent groups on the hydroxyls of the anhydroglucose units. The basic structure of cellulose which forms the backbone of the antisoiling agents of the invention may be depicted as follows, wherein n is a finite number:
The number of substituent groups of the hydroxyls of the anhydroglucose units of cellulose can affect a number of properties, such as solubility and gel point. Substituent groups can be designated by weight percent or by the number of points where groups are attached to the hydroxyls, otherwise termed degree of substitution (D.S. If all three available positions on each unit are substituted, the D8. is designated as (3) three; if an average of two on each ring are reacted, the D8. is designated (2) two, etc. I I
In the manufacture of suitable anti-soiling agents of the invention having methoxylsubstitution, cellulose fibers, from cotton linters or wood pulp, are swelled by caustic soda solution to produce alkali cellulose which is then treated with alkyl chloride, e.g., methyl chloride, yielding the alkyl ether of cellulose, e.g., methyl cellulose. A preferred anti-soiling agent of the invention is an hydroxyalkyl alkyl cellulose which is prepared by swelling cotton linters or wood pulp with a caustic soda solution to produce alkali cellulose which is treated with an alkylchloride, e.g., methyl chloride, and an alkylene oxide, e.g., propylene oxide which leads to a substituent group having a secondary hy-.
droxyl on the number two carbon [OCH2CH(OH)CH,,I
CH OH OCH Especially suitable is such a material wherein the methoxyl substitution corresponds to from 27% to 30% by weight and propylene glycol ether substitution amounts to 7% to 12% by weight.
Anotherpreferred anti-soiling agent is methyl cellulose. These preferred materials are commercially available under the name Methocel (The Dow Chemical Company).
The anti-soiling agents of the invention are characterized by molecular weights which can be expressed in terms of their viscosity grades measured with a Ubbelohde tube as a 2% by weight aqueous solution at 20C. It will be appreciated that the viscosity that such materials will produce in solution depends on the length of the polymer chain. Suitable anti-soiling agents herein are those which provide a viscosity grade as defined hereinbefore of less than about 400 centipoises. Preferably, they have a viscosity grade of less than about 100 centipoises.
The amount of anti-soiling agent employedto provide effective soiland stain-release properties will depend on such factors as the particular softening agent employed, the nature of the anti-soiling agent and its molecular weight or viscosity and the desired viscosity or physical appearance of the finished composition. As little as 0.1% of the anti-soiling agent based on the weight of composition may be enough in some instances, whereas up to about 10% may be required in others. Preferably, the anti-soiling agent comprises fromabout 0.25% to about 5% of the composition. In practice, an amount of a composition of the invention ca orr is added to the rinsing cycle of a laundering operation as to provide a concentration of the anti-soiling agent of from 2 to 100 ppm. Preferably, the concentration is from 5 to 50 ppm.
The compositions of the invention can be formulated in a convenient manner to provide uniform and homogeneous compositions of viscosity below about 250 centipoises. Preferably, the viscosity is in a range of from 30 to 180 centipoises. In practice, a solution of the anti-soiling agent is prepared by adding the agent to water at an elevated temperature. The temperature is then lowered sufficiently as to cause the anti-soiling agent, having inverse temperature solubility characteristics, to go into solution. The remaining ingredients,
. fabric softening agent, emulsifying agent and minor optional ingredients are added. Alternatively, the antisoiling agent can be admixed with all the organic constituents of the finished composition and the resulting mixture be added with stirring to water to provide a finished composition.
It has been discovered that the anti-soiling agents of the invention retain their desirable soiland stainrelease properties at relatively low molecular weights, corresponding to viscosities of less than 400 centipoises in a 2% aqueous solution. Accordingly, they can be efiectively employed in fabric softening compositions where the viscosity of the finished composition is less than about 250 centipoises. While other cellulosederived anti-soiling agents of the prior art, e.g., hydroxypropyl cellulose, can provide desirable anti-soiling properties in a fabric softener composition, the molecular weight of such anti-soiling agents is frequently so high as to provide the finished composition with an unacceptable viscosity, i.e., above about 250 centipoises. 1f the molecular weight of such polymers is reduced in an attempt to mitigate the undesirable effect on the viscosity of the finished composition, the reduced viscosity is obtained at the expense of anti-soiling properties. In contrast to these prior art materials, the anti-soiling agents of the invention, as characterized hereinbefore, can be employed in fabric softener compositions to provide a desirable level of anti-soiling performance without at the same time causing the viscosity of the finished composition to be unacceptably high.
The compositions of the invention will preferably contain an emulsifying agent. Suitable emulsifiers which can be utilized in the compositions of the present invention include those selected from the group consisting of 1) the condensation product of one mole of alkylphenol wherein the alkyl chain contains from about 8 to about 18 carbon atoms with from about one to about 100 moles of ethylene oxide. Specific examples of these nonionics are the condensation product of one mole of nonylphenol with 9.5 moles of ethylene oxide; the condensation product of one moleof decylphenol with 40 moles of ethylene oxide; the condensation product of one mole of dodecylphenol with 35 moles of ethylene oxide; the condensation product of one mole of nonylphenol with 1.5 moles of ethylene oxide; the condensation product of one mole of tetradecylphenol with 35 moles of ethylene oxide; and the condensation product of one mole of hexadecylphenol with 30 moles of ethylene oxide; (2) the condensation product of one mole of an aliphatic alcohol wherein the alkyl chain contains from to about 24 carbon atoms with from about one to about 100 moles of ethylene oxide. Specific examples are the condensation product of one mole of coconut alkyl alcohol with 45 moles of ethylene oxide; the condensation product of one mole of tallowalkyl alcohol with 30 moles of ethylene oxide; the product sold by Union Carbide under the tradename Tergitol 15-8-9 which is the condensation product of one mole of secondary alkyl alcohol with alkyl chain lengths of from 11 to 15 with 9 moles of ethylene oxide; and the product sold by Union Carbide under the tradename Tergitol 15-S-3 which is the condensation product of one mole of secondary alkyl alcohol with alkyl chain lengths of from 1 1 to 15 with 3 moles of ethylene oxide; (3) polyethylene glycols having a molecular weight of from about 1400 to about 30,000. For example, Dow Chemical Company manufactures these nonionics in molecular weights of 20,000, 9,500, 7,500, 4,500, 3,400 and 1,450. All of these nonionics are wax-like solids which melt between l00F and 200F, and (4) mixtures thereof.
These emulsifiers function as solubilizing agents to prevent precipitation and maintain excellent freezethaw characteristics of the liquid compositions. These emulsifiers further act as stabilizers to promote shelf stability and maintain the desired viscosity. The emulsifiers are present in the composition of the present invention from about 0 to about 2% by weight, preferably from about 0.25% to about 1%. If more than about 2% by weight is used no advantages are achieved and product stability problems can arise. Small amounts of emulsifier are usually necessary to achieve the desired stability and freeze-thaw characteristics while maintaining the desired viscosity of the composition.
Miscellaneous materials such as optical brighteners such as the anionic stilbenes, coloring agents, and other materials which are well known as constituents in fabric softener compositions and which are compatible in the compositions of the present invention can also be present in minor amounts.
The following example illustrates the manner and the formulations with which the present invention can be practiced. However, the invention is not confined to the specific limitations set forth in the example, but rather, to the scope of the appended claims.
TEST METHOD EXAMPLE I Fabric swatches were laundered in a washing machine known as a Tergotometer. The detergent composition used contained 8% sodium dodecyl benzene sulfonate, 9% sodium tallow alkyl sulfate, 50% sodium tripolyphosphate, 6% sodium silicate having a S10 Na O ratio of 1.6, 13% sodium sulfate, 0.6% of a condensation reaction product of coconut alcohol and an average of 6 moles of ethylene oxide, and 1.5% ammonium coconut fatty acid amide and the balance water to The detergent composition was used at a product concentration of 0.1%, the wash water was at a temperature of F and contained water hardness of 7 grains. The washing process lasted 10 minutes followed by a 5 minute rinse cycle with water at a temperature of l00F and containing water hardness of 7 grains.
A fabric softener/soil release composition embodying the present invention (identified below as COMPOSI- TlON B) was tested and results compared to those obtained with a similar composition but one which did not contain a soil release agent as required by the present invention (identified as COMPOSITION A, below).
COMPOSITION A and COMPOSITION B were each added to the rinse cycle of the laundering procedures described above in order to expose the washed fabric to the fabric softener/soil release composition on the one properties has the Component Parts by Weight hand (COMPOSITION B) and to the softening compo- 5 Distear I dimethyl 5 2 sition on the other (COMPOSITION A). In the rinse ammzmium chloride cycle, in the case of COMPOSITIONS A and B, the y iffiyp l m concentration of fabric softener agent was 75 ppm. In 2? at -8 the case of COMPOSITION B, the concentration of Emulsifier(mixture of h l 10 secondary C alco 0 anti soiling agent in the rinse was 7.1 ppm. ethoxylmes)" TABLE I lsopropanol, ethanol, optical brighteners, FORMULATIONS misc- Composition Composition water Balance m 100 15 Ditallow dimethyl Substantially the same results in softening are obl l 79% 79% tained with the composition of Example II when any of Emulsifier (mixture of secondary C,, the following cationic fabric softeners is substituted on 3 8- 050% an equal weight basis for the distearyl dimethyl ammosf minors 075% 20 nium chloride in Example II, (coconut as used below and water to 100% m 100% has the following chain length distribution: 2% C *Hydroxypropyl methyl cellulose having 28-30 weight percent methoxyl suhstitu- C12 C14 and C16): tion; 7l2 weight 74 propylene glycol ether substitution; viscosity of cp: mea ditallowalkyl dlmethyl ammonium ChIOI'lde, sured in Ubbelohde tube at 2% by weight concentration in water at 20C. di d yl ammonium hl id tallowalkyl dimethyl (3-tallowalkoxy-2-hydroxypro- A washing/rinsing treatment cycle was repeated pyl) ammonium chloride, three times. Thereafter, the fabric swatches were 2-heptadecyl-l-methyl-l-[(2-stearoylamido)ethyl stained with a controlled amount of an oily soil as iden- ]imida2olinium methyl sulfate, tified below in Table II. eicosyl dimethyl benzylammonium chloride,
Following the staining treatment, the fabric swatches eicosyl trimethyl ammonium chloride, were allowed to stand overnight for a period of 18 tetradecyl-tri(2-hydroxyethyl)ammonium methyl hours to permit the oily soil to age on the fabrics. The sulfate, aged swatches were then weighed, washed, and then octadecyl-tri(2-hydroxyethyl)ammonium methyl suldried. The fabrics were then reweighed and this permitfate, ted calculation of the weight percentage of oily soil di(Z-benzyloctadecyl)dimethyl ammonium ethyl sulwhich was removed during the washing step. fate,
Using this test method, the following results were di-(3-oxa-heptadecyl)di(3-hydroxypropyl)amobtained. monium bromide,
TABLE II WEIGHT OIL REMOVED Used Crank *OHT Case Oil Oil Mixture Triglyceride Comp. Comp. Comp. Comp. Comp. Comp. FABRIC A B A B A B 1. Nylon 33 89 42 95 36 85 2. Blend Fabric Containing 65% Polyester and 35% Cotton 25 e0 44 82 e3 72 3. Polyester 3 62 I2 59 3 5l 4. Durable Press Blend Fabric of 65% Polyester and 35% Cotton Treated with a Permanent Press Resin I6 67 42 83 68 72 *OHT oil is a blend of equal parts of oleic acid, hexadecane. and triglyceride EXAMPLE II A fabric softener having a viscosity of about centipoises and effective in the final rinse cycle of a home laundering operation to provide treated fabrics with di( 2-dodecoxyethyl)dimethyl ammonium chloride, di(2-stearoyloxyethyl)dimethyl ammonium chloride, 2-stearoyloxyethyl triethyl ammonium chloride, di(4-hydroxyoctadecyl)dimethyl ammonium ethyl sulfate,
2,4-dihydroxyoctadecyl trimethyl ammonium chloride,
di(2-stearamidopropyl)dimethyl ammonium chloride,
ditallowalkyl dimethyl ammonium bromide, ditallowalkyl dimethyl ammonium methyl sulfate, ditetradecyl diethyl ammonium chloride, ditetradecyl dimethyl ammonium chloride, coconutalkyl triethyl ammonium chloride, and
dicoconut alkyl diethyl ammonium chloride.
EXAMPLE III Component Parts by Weight Distcaryl dimethyl ammonium 5.5
chloride 9 Methyl Cellulose (viscosity of 50 cp at 2% in water and 20C Emulsifier (mixture of nonyl phenol ethoxylates) lsopropanol, ethanol, optical hrighteners, dye, miscellaneous Water 1.6 Balance to 100 Substantially the same results in softening are obtained with the compositions of Example 111 when any of the following emulsifiers are substituted on an equal weight basis for the nonyl phenol ethoxylate of Example Ill. (Coconut as used below has the following chain length distribution: 2% C 66% C 23% C and 9% C The condensation product of one mole of decylphenol with 40 moles of ethylene oxide; the condensation product of one mole of dodecylphenol with 35 moles of ethylene oxide; the condensation product of one mole of tetradecylphenol with 35 moles of ethylene oxide; the condensation product of one mole of heptadecylphenol with 30 moles of ethylene oxide; the condensation product of coconut-alkyl alcohol with 45 moles of ethylene oxide; the condensation product of tallow-alkyl alcohol with 30 moles of ethylene oxide; the condensation product of one mole of secondary alkyl alcohol with 9 moles of ethylene oxide, the alkyl group containing alkyl chain lengths from 11 to (Tergitol 15-S-9); the condensation product of one mole secondary alkyl alcohol with 3 moles of ethylene oxide, the alkyl group containing alkyl chain lengths from 11 to 15 (Tergitol 15-S-3); polyethylene glycol having a molecular weight of 20,000; polyethylene glycol having a molecular weight of 9,500; polyethylene glycol having a molecular weight of 7,500; polyethylene glycol having a molecular weight of 4,500; polyethylene glycol having a molecular weight of 3,400; polyethylene glycol having a molecular weight of 1,450; and mixtures thereof.
In addition to the preferred embodiments described herein, other arrangements and variations within the spirit and scope of the present invention and the appended claims will occur to those skilled in the-art.
As used herein the terms anti-soiling and soil-release are used interchangeably notwithstanding that there may be mechanistic differences involved.
What is claimed is:
l. A liquid fabric softener composition having a viscosity of less than about 250 centipoises and effective to provide fabrics with softening and anti-soiling prop erties consisting essentially of:
A. from about 2% to about 15% by weight of a cation-active fabric softener compound having from one to two straight-chain organic groups of from 8 to 22 carbon atoms;
12 B. from about 0.1% to about 10% of a soil release agent selected from the group consisting of hydroxyalkyl alkyl cellulose and alkyl cellulose where each alkyl has from 1 to 3 carbon atoms, said soil release agent providing a viscosity of less than about 400 centipoises determined at a two percent by weight concentration in water at 20C; C. from O to about 2% of an emulsifier selected from the group consisting of l. the condensation product of one mole of alkylphenol wherein the alkyl chain contains from about 8 to about 18 carbon atoms with from about one to about moles of ethylene oxide, 2. the condensation product of one mole of an aliphatic alcohol wherein the alkyl chain contains from about 10 to about 24 carbon atoms with from about 1 to about 100 moles of ethylene oxide, 3. polyethylene glycol having a molecular weight of from about 1400 to about 30,000, 4. mixtures thereof; and D. the balance water. 2. The composition of claim 1 wherein the cationactive fabric softener compound is a quaternary ammonium softener compound having the formula wherein R is hydrogen or an aliphatic group of from 1 to 22 carbons; R is an aliphatic group having from 12 to 22 carbon atoms; R; and R are each alkyl groups of from one to 3 carbon atoms; and X is an anion selected from the group consisting of halogen, acetate, phosphate, nitrate and methyl sulfate.
3. The composition of claim 2 wherein R and R are each stearyl, R and R are each methyl and X is chlo ride.
4. The composition of claim 1 wherein the soil re lease agent is hydroxypropyl methyl cellulose.
5. The composition of claim 4 wherein the hydroxypropyl methyl cellulose has a methoxyl substitution of from 27% to 30% by weight and a propylene glycol ether substitution of from 7% to 12% by weight.
6. The composition of claim 5 wherein the hydroxypropyl methyl cellulose is employed in an amount of from 0.25% to 5% by weight of the composition.
7. The composition of claim 1 wherein the emulsifier ranges from 0.25% to 1% and is a mixture of secondary C alcohol ethoxylates.
8. The composition of claim 1 wherein the cationic fabric softener ranges from 2.5% to about 6%.
9. The composition of claim 1 wherein the soil release agent is methyl cellulose.
10. A method of imparting softening and anti-soiling properties to washed textiles which comprises treating previously-washed textiles in an aqueous rinsing bath containing minor but effective amounts of a cationactive fabric softening agent having from one to two straight chain organic groups of from 8 to 22 carbon atoms and a soil release agent selected from the group consisting of hydroxyalkyl alkyl cellulose and alkyl cellulose where each alkyl has from 1 to 3 carbon atoms, said soil release agent providing a viscosity of less than about 400 centipoises determined at a two percent by weight concentration in water at 20C.
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|US5405542 *||Dec 27, 1990||Apr 11, 1995||The Procter & Gamble Company||Rinse-added fabric conditioning compositions containing fabric softening agents and cationic polyester soil release polymers and preferred cationic soil release polymers therefor|
|US5540850 *||Jun 8, 1994||Jul 30, 1996||Lever Brothers Company, Division Of Conopco, Inc.||Detergent composition with fabric softening properties|
|US5916864 *||Jul 21, 1997||Jun 29, 1999||Sunstar Inc.||Laundry detergent composition comprising a combination of a sparingly water soluble solvent and an easily water soluble solvent|
|US20080176784 *||Apr 9, 2004||Jul 24, 2008||Ann Clowes||Fabric Conditioning Compositions|
|EP0220156A2 *||Oct 6, 1986||Apr 29, 1987||THE PROCTER & GAMBLE COMPANY||Fabric softener composition|
|WO2000065015A2 *||Apr 25, 2000||Nov 2, 2000||The Procter & Gamble Company||Surface care compositions and methods for treating surfaces|
|WO2000065015A3 *||Apr 25, 2000||Feb 8, 2001||Procter & Gamble||Surface care compositions and methods for treating surfaces|
|WO2004101724A1 *||Apr 9, 2004||Nov 25, 2004||Unilever Plc||Fabric conditioning compositions|
|U.S. Classification||510/517, 106/190.1|
|International Classification||C11D3/00, D06M15/01, D06M13/46, D06M13/00, D06M13/322, D06M13/02, D06M15/09|
|Cooperative Classification||D06M13/46, C11D3/0015, D06M15/09|
|European Classification||D06M15/09, C11D3/00B3L, D06M13/46|