Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/0005—Other compounding ingredients characterised by their effect
  • C11D3/001—Softening compositions
  • C11D3/0015—Softening compositions liquid
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/38—Cationic compounds
  • C11D1/62—Quaternary ammonium compounds
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/18—Hydrocarbons
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/20—Organic compounds containing oxygen
  • C11D3/2093—Esters; Carbonates
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/02—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with hydrocarbons
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
  • D06M13/224—Esters of carboxylic acids; Esters of carbonic acid
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
  • D06M13/46—Compounds containing quaternary nitrogen atoms

Definitions

• This invention relates to fabric softening compositions and, in particular, to compositions in aqueous medium having improved softening effectiveness combined with excellent physical characteristics, especially formulation stability.
• Conventional rinse-added fabric softening compositions contain fabric softening agents which are substantially water-insoluble cationic materials usually having two long alkyl chains. Typical of such materials are distearyl di-methyl ammonium chloride and imidazolinium compounds substituted with two stearyl groups. These materials are normally prepared in the form of an aqueous dispersion or emulsion, and it is generally not possible to prepare such aqueous dispersions with more than about 6% of cationic material without taking special precautions to ensure acceptable viscosity and stability characteristics. Indeed, with cationic levels in excess of about 8% the problems of physical instability and high viscosity become,in the case of conventional fabric softening products, almost intractable. This, of course, limits the level of softening performance achievable with conventional compositions without using excessive amounts of product, and also adds substantially to distribution and packaging costs, because of the need to market such dilute solutions of the active ingredient.
• Formulations prepared in this manner are still not entirely satisfactory.
• the level of softness benefit delivered by such compositions on a unit active weight basis is still much lower than for conventional dilute products and problems of physical formulation characteristics, especially phase stability and also viscosity, still remain.
• phase stability remains a problem even in the case of dilute softener compositions formulated in the manner of the above prior art references.
• 25 03 026 discloses a complex softener/disinfectant composition in which a long chain fatty alcohol is suggested as a solubilization aid.
• U.S. Patent No. 3,793,196 describes an improved viscosity softening agent in the form of an oil-in-water emulsion comprising a cationic surface-active agent, a higher fatty alcohol, a sorbitan fatty acid ester and a polyethoxylated nonionic surfactant.
• the present invention accordingly provides a fabric softening composition having improved softening characteristics and cost-effectiveness combined with excellent physical characteristics, especially phase stability, freeze-thaw behaviour and low viscosity; and it further provides a concentrated fabric softening composition having satisfactory characteristics for consumer use, based on cationic fabric softener as the major active component.
• an aqueous fabric softening composition characterized by:-
• the physical form of the composition is that of a dispersion of an anisotropic softener phase in an aqueous isotropic surfactant solution phase.
• the physical form is simply determined under a polarizing microscope.
• the anisotropic/isotropic phase system is highly important for achieving optimum viscosity, stability, softening and other textile benefits.
• The.water insoluble cationic fabric softener is preferably a di-C 12 -C 24 alkyl or alkenyl 'onium salt, especially a mono- or polyammonium salt, an imidazolinium salt or a mixture of such salts. Highly preferred are mono-quaternary ammonium salts, imidazolinium salts and mixtures thereof.
• the water-soluble cationic surfactant is preferably a mono-C 8-24 alkyl or alkenyl 'onium salt, especially a mono- or polyammonium salt, an imidazolinium salt, a pyridinium salt or a mixture of such salts. Highly preferred are mono-quaternary ammonium salts, imidazolinium salts and mixtures thereof.
• the preferred water-soluble nonionic surfactant has the general formula RO(CH 2 CH 2 0) n H wherein R is a C 8-20 alkyl or alkenyl group, and n is from 2 to about 100.
• the weight ratio of water-insoluble cationic to water-soluble cationic and/or nonionic surfactant falls preferably in the range from about 20:1 to about 4:1, especially from about 15:1 to about 6:1.
• the weight ratio of the cationic softener to the hydrophobic adjunct preferably falls in the range from about 8:1 to about 2:1.
• compositions of the invention preferably comprise from about 0.1% to about 6% of the water-soluble cationic and/or nonionic surfactant, from about 0.5% to about 6% of the non-cyclic hydrocarbon and from O% to about 6% of the fatty acid ester.
• percentage figures given for components in a composition refer to the weight percent of that component in the composition.
• highly preferred materials are C 12 -C 24 , especially C 12 - C 20 paraffins or paraffin mixtures, esters of C 12 - C 24 fatty acids with monohydric alcohols having from 1 to 8 carbon atoms, and mixtures of these paraffin and fatty acid ester materials in a 3:1 to 1:3 weight ratio.
• compositions of the invention thus comprise three essential ingredients, a water-insoluble cationic fabric softener, a water-soluble cationic and/or nonionic surfactant and a hydrophobic adjunct selected from C 10 -C 40 non-cyclic hydrocarbons and fatty acid ester, the water soluble surfactant and the hydrophobic adjunct acting in combination to provide compositions of optimum viscosity and stability.
• a water-insoluble cationic fabric softener e.g., a water-soluble cationic and/or nonionic surfactant and a hydrophobic adjunct selected from C 10 -C 40 non-cyclic hydrocarbons and fatty acid ester, the water soluble surfactant and the hydrophobic adjunct acting in combination to provide compositions of optimum viscosity and stability.
• a hydrophobic adjunct selected from C 10 -C 40 non-cyclic hydrocarbons and fatty acid ester
• the water-insoluble cationic fabric softener can be any fabric-substantive cationic sompound which, in pure form as a strong acid salt (e.g. chloride), has a solubility in distilled water at pH 2.5 and 20°C of less than lg/1, or can be a mixture of such compounds.
• the soluble fraction of the surfactant is taken to be that material which cannot be separated from water by centrifugal action and which passes a 100nm Nuclepore filter (Registered Trade Mark).
• Preferred materials are di-C 12 -C 24 alkyl or alkenyl 'onium salts, especially mono- and poly-ammonium salts, and imidazolinium salts.
• the two long chain alkyl or alkenyl groups may be substituted or interrupted by functional groups such as -OH, -O-,CONH-, -COO-, etc.
• R 1 and R 2 represent alkyl or alkenyl groups of from about 12 to about 24 carbon atoms
• R 3 and R 4 represent alkyl, alkenyl or hydroxyalkyl groups containing from 1-to about 4 carbon atoms
• X is the salt counter-anion, preferably selected from halide, methyl sulfate and ethyl sulfate radicals.
• these quaternary softeners include ditallow dimethyl ammonium chloride; ditallow dimethyl ammonium methyl sulfate; dihexadecyl dimethyl ammonium chloride; di (hydrogenated tallow alkyl) 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; di(coconut alkyl) dimethyl ammonium chloride and di(coconut alkyl) dimethyl ammonium methosulfate. Of these ditallow dimethyl ammonium chloride and di (hydrogenated tallow alkyl) dimethyl ammonium chloride are preferred.
• alkyl imidazolinium salts believed to have the formula:- wherein R 6 is an alkyl containing from 1 to 4, preferably 1 or 2 carbon atoms, R 7 is an alkyl containing from 12 to 24 carbon atoms, R 8 is an alkyl containing from 12 to 24.carbon atoms, and R 9 is hydrogen or an alkyl containing from 1 to 4 carbon atoms and X is the salt counter-anion, preferably a halide, methosulfate or ethosulfate.
• Preferred imidazolinium salts include 3-methyl-l-(tallowylamido) ethyl -2-tallowyl-4,5-dihydroimidazolinium methosulfate and 3-methyl-l-(palmitoylamido)ethyl -2- octadecyl-4,5-dihydroimidazolinium chloride.
• Other useful imidazolinium materials are 2-heptadecyl-3-methyl-1-(2-stearylamido)-ethyl- 4,5-dihydroimidazolinium chloride and 2-lauryl-3-hydroxyethyl-l-(oleylamido)ethyl-4,5-dihydro imidazolinium chloride.
• Also suitable herein are the imidazolinium fabric softening components of U.S. Patent No. 4,127,489, incorporated herein by reference.
• the water-insoluble cationic softener is present at a level of at least about 2%; below this level, the volume of product required to provide an acceptable level of softness benefit becomes excessively large.
• softener levels in the range of about 2% to about 6% there is, of course, generally no difficulty in preparing products of conventional type with the necessary low viscosity and good stability by adding, for instance, a low level of calcium chloride.
• the maximum level of cationic softener in the present formulations is determined by practical considerations; thus, above a cationic softener level of 22% the problems of physical stability and product viscosity are such that it is not generally possible to formulate stable pourable emulsions based on water-insoluble cationic softener as the major softening component.
• the water-soluble surfactant is a cationic or nonionic surfactant having a solubility in distilled water at pH 2.5 and 20°C of greater than lg/1.
• solubility of the cationic surfactant is defined with reference to the pure material in the form of a strong acid salt (e.g. chloride), and the soluble fraction of the surfactant is taken to be that material which cannot be separated from water by centrifugal action and which passes a 100 nm Nuclepore filter.
• Preferred water-soluble cationic surfactants are mono-C 8 -C 24 alkyl or alkenyl ammonium salts, imidazolinium salts, pyridinium salts and mixtures thereof.
• Suitable water-soluble mono-ammonium compounds have the general formula: wherein R 5 represents a C 8 -C 24 alkyl or alkenyl group, R 6 represents hydrogen, a C 1- C 12 alkyl, alkenyl or hydroxyalkyl group, an aryl group, a C 1-6 alkylaryl group, or a poly(ethylene oxide) group having from 2 to 20 ethylene oxide units, R 7 , R 8 individually represent hydrogen, a C 1 -C 4 alkyl, alkenyl or hydroxyalkyl group or a poly(ethylene oxide) group having from 2 to 20 ethylene oxide units and X is as defined above.
• Highly preferred materials of this general type include the tallow trimethyl ammonium salts, cetyl trimethyl ammonium salts, myristyl trimethyl ammonium salts, coconutalkyl trimethyl ammonium salts, stearyl dimethyl ammonium salts, cetyl dimethyl ammonium salts, myristyl dimethyl ammonium salts, coconutalkyl dimethyl ammonium salts, oleyl methyl ammonium salts, palmityl methyl ammonium salts, myristyl methyl ammonium salts, lauryl methyl ammonium salts, dodecyl dimethyl hydroxyethyl ammonium salts, dodecyl dimethyl hydroxypropyl ammonium salts, myristyl dimethyl hydroxyethyl ammonium salts, dodecyl dimethyl dioxyethylenyl ammonium salts, myristyl benzyl hydroxyethyl methyl ammonium salts,cocon
• Highly preferred water-soluble imidazolinium materials are represented by the general formula or acids salts thereof, wherein R 6 , R 7 , R 8 , R 9 and X were defined earlier.
• Preferred imidazolinium salts of this general formula include the compound in which R 6 is methyl, R 8 is tallowyl and R 9 is hydrogen and the compound in which R 6 is methyl, R 8 is palmitoyl and R 9 is hydrogen.
• R 11 is selected from an alkyl or alkenyl group having from 12 to 24, preferably from 16 to 20 carbon atoms in the alk(en)yl chain, R 11 CO- and R 11 -O-(CH 2 ) n -; each R 10 is independently selected from hydrogen, -(C 2 H 4 O) p H, -(C 3 H 6 O) q H, -(C 2 H 4 O) r (C 3 H 6 O) s H, a C 1-3 alkyl group and the group -(CH 2 ) n -N(R') 2 , wherein R' is selected from hydrogen, -(C 2 H 4 O) p H, -(C 2 H 4 O) p H, -(C 2 H 4 O) p (C 3 H 6 O) q H and C 1-3 alkyl; n is an integer from 2 to 6, preferably 2 or 3; m is an
• each p and q are each a number such that the total p+q+r+s in the molecule does not exceed.25 (preferably, each p and q is 1 or 2 and each r and s is 1); and X represents one or more anions having total charge balancing that of the nitrogen atoms.
• Preferred water-soluble cationic materials are alkoxylated and contain not more than one -C 2 H 4 OH or -C 3 H 6 0H group attached to each nitrogen atom, except that up to two of these groups can be attached to a terminal nitrogen atom which is not substituted by an alkyl group having from 10 to 24 carbon atoms.
• Polyamine species suitable for use herein include:
• the water-soluble cationic surfactant herein can also be represented by alkyl pyridinium salts having the following formula: wherein R 12 is a C 10 -C 24 , preferably C 16 or C 18 alkyl radical and X is a suitable anion as defined hereinbefore, preferably a halide, especially chloride or bromide.
• water-soluble cationic surfactants of the amine-salt class can be added in the form of the neutral amine followed by pH adjustment to within the range from about pH4 to about pH8.
• the hydrophobic adjunct is selected from non-cyclic hydrocarbons, fatty acid esters of monohydric alcohols and mixtures thereof, each component having a total of from 10 to 40 carbon atoms.
• the hydrophobic adjunct is present in an amount relative to the insoluble cationic softener and the water-soluble cationic and/or nonionic surfactant, to provide a dispersion of anisotropic softener phase in isotropic aqueous surfactant phase.
• the first class of hydrophobic adjunct is represented by non-cyclic hydrocarbons having from 10 to 40, preferably from 12 to 24, more preferably from 12 to 20 carbon atoms.
• hydrocarbons useful in the present invention are paraffins or olefins, but other materials, such as alkynes and halo-paraffins., for example myristyl chloride or stearyl bromide, are not excluded.
• Materials known generally as paraffin oil, soft paraffin wax and petrolatum are especially suitable. Examples of specific materials are tetradecane, hexadecane, octadecane and octadecene.
• Preferred commercially-available paraffin mixtures include spindle oil and light oil and technical grade mixtures of C 14 /C 17 and C 18 /C 20 n-paraffins.
• the second class of hydrophobic adjunct is represented by fatty acid esters having a total of 10 to 40 carbon atoms.
• Preferred materials are esters of C 8 -C 24 fatty acids with mono-hydric alcohols having from 1 to 8, especially from 1 to 4 carbon atoms.
• the mono-hdyric alcohol portion of the ester can be represented by methanl, ethanol,. n-propanol, isopropanol, n-butanol, iso-butanol, t-butanol, 2-ethylhexanol and iso-octanol.
• Examples of such materials are methyl laurate, ethyl stearate, isopropyl myristate, isopropyl palmitate. iso-butyl stearate, isopropylstearate, 2-ethylhexyl laurate and isooctyl myristate. Of the above, iso-butyl stearate is highly preferred.
• paraffins having from 12 to 20 carbon atoms constitute the preferred adjunct.
• mixtures of paraffins and fatty acid esters in a 3:1 to 1:3 weight ratio are also effective.
• the hydrophobic adjunct acts to lower the viscosity of the composition and because each of the materials has a long fatty chain, the agent does contribute to some extent to the softening performance of the composition, a feature which is not shared by other known viscosity control agents, for example electrolytes and low molecular weight solvent materials.
• Compositions of the present invention also have enhanced dispersibility in cold water and exhibit less dispenser residues than conventional fabric softening composition based solely on a cationic fabric softener.
• compositions may contain other textile treatment or conditioning agents.
• Such agents include silicones, as for example described in German Patent Application DOS 26 31 419 incorporated herein by reference.
• the optional silicone component can be used in an amount of from about 0.1% to about 6%, preferably from 0.5% to 2% of the softener composition.
• a further optional component of the present composition is a fatty acid ester of a polyhydric alcohol, for instance a C12-C22 fatty acid ester of ethylene glycol, propylene glycol, glycerol, diglycerol, xylitol, sucrose, erythritol, pentaerythritol, sorbitol or sorbitan.
• esters specific examples of which include ethyleneglycol monostearate, propyleneglycol monostearate, glyceryl monostearate and glyceryl distearate, can provide an additional softening facility.
• fatty acid esters are relatively hydrophilic and indeed are emulsifying materials in their own rights, it is desirable to include such materials in a level of no more than about 4% by weight or in a weight ratio with respect to the cationic softener of no more than about 2:3.
• compositions herein can contain other optional ingredients which are known to be suitable for use in textile sogteners at usual levels for their known functions.
• adjuvants include emulsifiers, perfumes, preservatives, germicides, colorants, dyes fungicides, stabilizers, brighteners and opacifiers. These adjuvants, if used, are normally added at their conventional low levels.
• composition of the invention can also comprise additional viscosity control agents, such as 1% to 10% of lower alcohols, especially ethanol and isopropanol, and electrolytes, for example calcium chloride, at levels of from 100 to 1000 ppm. It is a feature of the invention, however, that such materials can be reduced or eliminated completely from the instant compositions.
• compositions can normally be prepared by mixing the ingredients together in water, heating to a temperature of about 60°C and agitating for 5-30 minutes.
• the pH of the compositions is generally adjusted to be in the range from about 3 to about 8, preferably from about 4 to about 6. In this preferred pH range, it will be understood that the neutralization of amines or polyamines in the composition can be incomplete.
• compositions of the present invention are added to the rinse liquor, a concentration from about lO ppm to 1000 ppm, preferably from about 50 ppm to about 500 ppm, of total active ingredient is appropriate.
• Concentrated liquid fabric softeners were prepared having the compositions indicated below, by dispersing the active ingredients in water at about 60°C.
• compositions had good phase stability, low viscosity, good dispersibility and excellent softening characteristics compared with compositions containing no hydrophobic adjunct or no water-soluble cationic or nonionic surfactants or with compositions in which the active system contains a major proportion of hydrophobic adjunct and/or soluble surfactant.
• Concentrated fabric softeners were prepared in analogous manner with the compositions indicated below.
• compositions were stable dispersions with low viscosity, good dispersibility and excellent softening characteristics compared with compositions containing no hydrophobic adjunct or soluble surfactant or with compositions in which the active system contains a major proportion of the hydrophobic adjunct and/or soluble surfactant.
• Aqueous fabric softening compositions were prepared according to the following formulae:
• compositions were stable dispersions with low viscosity, good dispersibility and excellent softening characteristics compared with compositions containing no hydrophobic adjunct or soluble surfactant or with compositions in which the active system contains a major proportion of the hydrophobic adjunct and/or soluble surfactant.

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• 1980
  • 1980-04-10 EP EP80200320A patent/EP0018039B2/de not_active Expired
  • 1980-04-10 AT AT80200320T patent/ATE6524T1/de not_active IP Right Cessation
  • 1980-04-10 DE DE8080200320T patent/DE3066798D1/de not_active Expired
  • 1980-04-18 CA CA000350155A patent/CA1154206A/en not_active Expired
  • 1980-04-21 JP JP5278180A patent/JPS569477A/ja active Pending

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