JP2001525020A - Stable rinse cycle fabric softener composition comprising glycerol monostearate assisted softener - Google Patents

Abstract

  (57) [Summary] A quaternary diester fabric softener, such as, for example, N-methyl-N, N, N-triethanolamine ditallow ester quaternary ammonium salt, which is stable and injectable, has an HLB value greater than 7.5 Disclosed is a rinse cycle fabric softener containing a fatty alcohol ethoxylate nonionic surfactant as an emulsifier.

Description

DETAILED DESCRIPTION OF THE INVENTION               Contains glycerol monostearate auxiliary softener                 Stable rinse cycle fabric softener composition                                Field of the invention   The invention is intended for use in the rinse cycle of automatic fabric washing machines and for hand washing. It relates to the intended liquid fabric softener composition. More specifically, the present invention Specified by properties such as uniform viscosity over a range of temperatures and avoidance of phase separation Aqueous fabric that gives the fabric improved softness with improved product stability The present invention relates to a fabric softener composition.   To provide the benefit of softening the fabric when used in a laundry rinsing operation, Compositions containing quaternary ammonium salts are generally used. These kinds of Numerous patents have been issued for compounds and compositions.   However, more recently, quaternary ammonium compound softeners have been Dimethyl distearyl (or ditallow) (ditallow)) The conventional "quart (q) exemplified by ammonium chloride There are many proposals for partial or total replacement of fabric softeners. ing.   For example, L. No. 5,133,885 to Contor et al. (EP04) 23894, both of which are assignees of the present invention, Cogate-Palm. active Company) has the formula: [Wherein one or two R groups represent an aliphatic ester residue having 12 to 30 carbon atoms, The remaining R groups represent lower aliphatic, aryl or hydroxyalkyl groups;^-Is And "a" represents the valency of the anion.] And a fatty acid ester quat represented by the formula and a fatty acid amidoamine softener: [Wherein, R¹Is C₁₂-C₃₀An alkyl or alkenyl group;^TwoIs R¹, R¹CO NH (CH_Two)_mOr CH_TwoCH_TwoOH and R^ThreeIs hydrogen, methyl or (CH_TwoCH_Two O)_pH, m is a number from 1 to 5, and p is a number from 1 to 5] Of esterquat to amidoamine from 10: 1 to 1:10 Fabric softener compositions that are aqueous dispersions in quantitative proportions are described.   U.S. Patent No. 4,844,823 to Jacques et al. A fabric softener composition wherein the agent is a diesterified long chain quaternary ammonium compound are doing.   Glycerol monostearate (GMS) is generally "esterquat" flexible Known milks for the above esterified quaternary ammonium softeners, referred to as agents Agent. Chang, U.S. Pat. No. 5,066,414, discloses Zitalomethy. Estes which are mono- or di-esters of ruammonium chloride (DTDMAC) Luquat with glycerol monostearate and C₈-C₁₈Linear fatty alcohol Selected from the condensation products of ethylene glycol with 1 to about 10 moles of ethylene oxide. A fabric softener composition is described that is included with a lucoxylated alcohol.   No. 5,545,350 to Baker et al. Optionally includes, for example, sorbitan Diesters further containing nonionic softeners such as esters as additional softeners A fabric softener composition comprising a quaternary ammonium compound is disclosed. 13 columns In lines 22-24, the patentee states that “glycerol monostearate with low HLB The rate has a detrimental effect on the stability of the composition. In column 4, lines 65-67, "The composition of the present invention consists essentially of glycerol monostearate. (GMS) ", the patentee states. , Low HLB of GMS may cause phase separation and / or stability problems of the compositions disclosed in this patent It is because it causes.   Diester quaternary ammonium compound softener and auxiliary softener in combination Not adversely affect the stability and viscosity of the product despite the prior art disclosure There is still a need to provide improved flexibility to diesterquat softener compositions There is.                                Summary of the Invention   According to the present invention, a stable, injectable water-dispersible fabric softener composition,   (A) a combination of about 1% to about 25% by weight of the fabric softening components (A) and (B); However, in this case, (A) is represented by the formula (I): [Wherein each R_FourIndependently represents an aliphatic hydrocarbon group having 8 to 22 carbon atoms;_FiveIs (C H_Two)_s-R₇And R₇Is an alkoxycarbonyl group having 8 to 22 carbon atoms, benzyl , Phenyl, (C₁-C_Four) Represents alkyl-substituted phenyl, OH, or H;₆Is (CH_Two)_tR₈And R₈Is benzyl, phenyl, (C₁-C_Four) Alkyl-substituted Q, r, s and t are each independently a number from 1 to 3 X is an anion of valence a] (B) is a biodegradable fatty ester quaternary ammonium compound represented by Serol monostearate;   (B) an effective amount by the Davies Group number method Fat alcohol having a hydrophilic lipophilic ratio (HLB) value greater than about 7.5 An emulsifier comprising a ruethoxylate nonionic surfactant; and   (C) aqueous solvent And a fabric softener composition containing no inorganic mineral acid and no organic acid.   The present invention also provides a fabric softener composition of the present invention in an amount effective to soften the fabric. And preferably during the rinsing cycle of the automatic laundry washer. This also provides a method for imparting flexibility to the fabric.   The present invention relates to diester quaternary ammonium compounds as described herein. With glycerol monostearate (GMS) as an auxiliary softener and emulsifier Is selected by the present invention to have an HLB greater than 7.5, And that it can be used without adversely affecting overall product stability Based on For the purposes of the present invention, the HLB value is the value of Proceedings 2^nd Intern. Congress on Surface Activity, Davier described in Butterworths, London (1957) It is calculated using the s base value. According to this calculation method, the HLB value of 7 is the surface activity It means that the agent has the same affinity for the water phase as for the oil phase. Negative values are Assigned to lipophilic groups in the molecule, positive values are assigned to hydrophilic groups. specific The HLB of the surfactant represents the lipophilic group by adding the sum of the positive values representing the hydrophilic groups to Formula 7 It is calculated by subtracting the sum of the negative values.   For example, fatty alcohol ethoxylate used as an emulsifier in the composition of the present invention Nonionic surfactants have the following designation for the groups present in the surfactant molecule: Da has a base value.Base value   -CH_Two− −0.475   -CH_Three− −0.475   − (CH_Two-CH_Two-O)-+0.33   -O- +1.3   By way of illustration, a nonionic surfactant emulsifier useful in the present invention, C₁₃-C_FifteenEO2 The HLB of 0: 1 is calculated as shown below. Nonionic surfactants may be alcohol Average carbon ethoxylated with 20 moles of ethylene oxide per mole of ethylene It is a fatty alcohol of the formulas 13 to 15.   For simplicity, the length of the alkyl chain is the average C₁₄And In this case, the obtained The molecule shall consist of the following groups: 1 CH_Three-; 13 -CH_Two-; And 20-(CH_Two-CH_Two-O)- Based on the above, the HLB is calculated as follows:   HLB = 7 + [1x (-475)] + [13x (-475)] + [1x (1.3)] + [20x (0.33)] HLB = 8.25                             Detailed description of the invention   The primary softener composition according to the present invention has the formula: Is a fatty ester quaternary ammonium compound having the formula:   Each R_FourIs independently an aliphatic carbon having 8 to 22 carbon atoms, preferably 14 to 18 carbon atoms. Represents a hydrogen group. R_FiveIs R₇Depending on the long-chain alkyl ester group (R₇= C₈-C_{twenty two} A group capable of representing an alkoxycarbonyl) (CH_Two)_s-R₇Represents this In some cases, the compound of formula (I) is a triester quaternary ammonium compound. R₆Is (CH as defined above_Two)_tR₈Represents   However, preferably, the fatty ester quaternary ammonium compound is diesterified. Compound, ie, R₇Is benzyl, phenyl, (C₁-C_Four) Alkyl substituted Represents nil, hydroxyl (OH), or hydrogen (H). Most preferably, R₇Is O H or H, particularly preferably OH, for example R_FiveIs hydroxyethyl .   q, r and s each independently represent a number of 1-3.   X is, for example, Cl^-, Br^-, CH_ThreeOSO_Three ^-, CH_ThreeCH_TwoOSO_Three ^-Like, Represents a counter ion of valence a. For example, the diester quat of formula (II) has the formula:[Wherein each R_FourFor example hard or soft tallow, coco, stearyl, oley And the like.] this Such compounds are available, for example, from Kao Corporation (Japan) A quaternary ammonium methyl sulfate It is commercially available as T-75. Tetranyl AT-75 is about 2 Based on a mixture of 5% hard tallow and about 75% soft tallow. Therefore, Contains about 34% unsaturated alkyl chains. The second example is High Po Hipochem X-89107 from int Chemical Company; This is because Tetranyl AT-75, which is about 100% saturated in the tallow portion, It is a homolog. However, in general, quaternary ammonium esters of the formula (III) The compounds can contain from about 5% to about 75% unsaturated (long chain) alkyl groups. .   Glycerol monostearate (GMS) is a quaternary ester of the fatty ester described above. An auxiliary softener used in combination with a monium compound softener. In the composition Fat ester quats generally range from about 1% to about 20% by weight of the composition. And preferably ranges from about 1% to about 12% by weight, most preferably Or about 2% to about 10% by weight. The amount of GMS in the composition is about 0.1 From about 0.5% to about 8%, preferably from about 0.5% to about 8% by weight. Also preferably varies from about 0.5% to about 5% by weight.   The emulsifier used in the fabric softener composition of the present invention stabilizes the composition and reduces Over a period of at least several months or in the absence of such emulsifiers Over the temperature range in which such compositions would be unstable in the presence of GMS Necessary to prevent phase separation and / or unstable viscosity. Fats useful in the present invention Fatty alcohol ethoxylates form ethylene oxide condensation of higher fatty alcohols , Higher fatty alcohols have about 9 to 15 carbon atoms, and The number of lenoxide groups is about 10-30. Preferred fatty acids for use in the present invention In alcohol ethoxylate, the alkyl chain length ranges from about 13 to 15 carbon atoms. And the number of ethylene groups is about 15 to 20 / mol. Particularly preferred for use in the present invention. What is new is synperoni, manufactured by ICI Chemicals. c A20, such a nonionic surfactant being added to the Ethoxylated C having 20 moles of lenoxide and having an HLB of 8.25₁₃-C_Fifteen Fatty alcohol.   Generally, the HLB of a nonionic fatty alcohol ethoxylate is from about 7.5 to about 10 And an HLB range of about 8 to about 9 is preferred. These cause emulsification in the composition In an amount sufficient for the composition, typically from about 1% to 5% by weight of the composition. .   The composition of the present invention exists in the form of fine particles in which the fabric softener compound is stably dispersed in the aqueous phase. Provided as an existing aqueous dispersion. Generally, less than 25 microns (μm) on average Full, preferably less than 20 μm, particularly preferably no more than 10 μm dispersed particles , These grain sizes are usually in use during the automatic washing machine washing cycle Is acceptable for both softening and stability as long as it can be maintained.   The aqueous phase of the dispersion is primarily water, usually deionized or distilled water. viscosity A small amount (eg, about 5% by weight) of a co-solvent may be present to control . Typically, lower mono- and poly-hydroxy alcohols are commonly used as co-solvents. Used in amounts up to about 5% by weight of the composition. Preferred water-soluble alcohol (alcoh ols and aqueous) are alcohols having 2 to 4 carbon atoms, such as ethanol, Pananol, isopropanol, and propylene glycol. Isopropyl Alcohols (2-alcohols) are particularly preferred. However, no co-solvent is needed. And generally avoided.   The compositions of the present invention include an electrolyte to reduce the viscosity of the dispersion. Generally, mineral acids Either alkali metal salt or alkaline earth metal salt can be used as electrolyte No. Considering availability, solubility and low toxicity, CaCl_Two, MgCl_Two, M gSO_FourAnd similar salts of alkali metals and alkaline earth metals are particularly preferred. Electric The deflocculated mass is selected to ensure that the composition does not form a gel. In general About 0.05-2.0% by weight, preferably 0.1-1.5% by weight, particularly preferred The amount of electrolyte salt of 0.25 to 1.4% by weight effectively prevents gelation.   The fabric softener composition of the present invention is formulated to be free of inorganic mineral acids and organic acids. This is because the desired rheology of the composition resulting in the presence of such an acid component and And / or may adversely affect stability.   A small amount of an optional component generally used in a fabric softening composition is added to the solution of the present invention. The appearance or performance properties of the body fabric softener composition can be enhanced. This kind of scripture Typical components include, but are not limited to, colorants such as dyes or pigments, rheology modifiers, Contains color protection agents, anti-staining agents, preservatives, bactericides and fragrances Include.   The final product, whether in concentrated or diluted form, is acceptable to the end user. Must be easily injectable. Therefore, in general, the viscosity of the final product (new Should not exceed about 400 centipoise, Preferably should be no more than 300 centipoise, but should not be too low , About 50 centipoise or more. Preferred viscosity of the concentrate product of the present invention Is in the range of 120-300 centipoise. For use herein Unless otherwise specified, viscosities are at Spindle # at 25 ° C (22-26 ° C). Brookfield RVTD Digital Viscome with 2 Measure using ter at 50 rpm.                                 Example 1   The method for producing the composition (Composition D) of the present invention will be described below.                                 Composition D Ingredient weight% Ditallow ester triethanolamine     Quaternary ammonium methyl sulfate 7.33 Glycerol monostearate 1.38 C₁₃-C_FifteenAlcohol EO20: 10.6 Dequest 2000⁽¹⁾                             0.1 Dye 0.002 Calcium chloride 0.05-0.5                                             (As needed for viscosity) Perfume 0.2-0.8 Water⁽¹⁾ Sold by Monsanto Chemical Company Phosphonate sequestrant   The water is heated to 60 ° C., then the dye, Dequest sequestrant and non- The on-emulsifier was dissolved in the heated water to form a first portion.   In a second container, diester quat softener and glycerol monostearate Were melted and blended at 60 ° C. by a mixer. Then you get The homogeneous blend was dispersed in the first part with stirring. Homogeneous emulsion Mixing was maintained for about 10 minutes until a solution was obtained. While maintaining stirring The emulsion was allowed to cool at 25 ° C.   Perfume was added to the cooled emulsion under stirring. Next, add calcium chloride In addition, the viscosity of the softener was adjusted to 100 to 200 cps.                                 Example 2   Use of emulsifiers described in the prior art for use with quaternary ammonium softeners In order to demonstrate the significance of the use of the emulsifier according to the invention compared to Testing was performed.   Three softener compositions based on diesterquat and GMS are described in Example 1. Manufactured as a solid and named Compositions A, B and C.  Composition A is according to the invention, and Synperonic A is used as emulsifier. Composition B contains 19 moles of ethylene oxide as an emulsifier, Fatty alcohol ethoxylate C having an HLB value of 6.5₁₆-C₁₈Fatty alcohol Fig. 6 is a comparative composition containing the same. Composition C comprises ethylene oxide 3 as an emulsifier. Fatty alcohol ethoxylate C having an HLB value of 1.81₁₂-C₁₃ 3 is a comparative composition containing a fatty alcohol.   The three compositions were produced as described above, immediately after production, one day later, and at 4 ° C. The viscosity was measured after 6 weeks at room temperature, 35 ° C. and 45 ° C.   As shown in Table 2, only composition A according to the present invention was treated at 43 ° C for 6 weeks. It remained stable below 300 cps after aging. Compositions B and C are unstable Not accepted for being sexual.                                 Example 3   For example, the stability of diester quat and GMS compositions as shown in Table 1 of Example 2 In order to demonstrate the significance of the HLB value of the emulsifier compared to the qualitative, Six compositions are prepared which differ only in the emulsifier. At a temperature of 35 ° C, The aging is performed for 6 weeks.   The emulsifiers used for each of the six compositions tested are listed in Table 3 below. Shows the HLB and the resulting composition stability at the end of the aging test You.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme court ゛ (Reference) C11D 3/43 C11D 3/43 (31) Priority claim number 09 / 237,528 (32) Priority date Heisei 11 January 27, 1999 (Jan. 27, 1999) (33) Priority country United States (US) (81) Designated country EP (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE), OA (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG) , AP (GH, GM, KE, LS, MW, SD, SZ, UG, ZW), EA (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN , IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, UZ, VN, YU, ZW (72) Inventor Hernandez, Salvador Yantez District of Mexico, United States Federal 11410, Miguel Hidalgo, Colonia Takuba 10, Golfo de Bengala, Intellium Numero 41 (72) Inventor Jack, Alan 08807, New Jersey, United States of America, Bridgewater, Rho Ring Knoll's Way 316

Claims (1)

[Claims] 1. A stable, injectable, water-dispersible liquid fabric softener composition, comprising: (a) about 1% to about 25% by weight of a combination of fabric softening components (A) and (B), wherein (a) A) is of the formula (I): [Wherein each R ₄ independently represents an aliphatic hydrocarbon group having 8 to 22 carbon atoms; R ₅ represents (CH ₂ ) _s -R ₇ , and R ₇ represents an alkoxycarbonyl group having 8 to 22 carbon atoms. Represents a group, benzyl, phenyl, (C ₁ -C ₄ ) alkyl-substituted phenyl, OH or H; R ₆ represents (CH ₂ ) _t R ₈ , wherein R ₈ is benzyl, phenyl, (C ₁ -C ₄ ) Q represents an alkyl-substituted phenyl, OH or H; q, r, s and t each independently represent a number from 1 to 3; and X is an anion having a valence of a. (B) glycerol monostearate; (b) an effective amount of a fatty alcohol having a hydrophilic lipophilic ratio (HLB) value greater than about 7.5 as measured by the Davies radix number method Milk containing ethoxylate nonionic surfactant Agent; and wherein the (c) an aqueous solvent, free of inorganic mineral acids and organic acids fabric softener composition. 2. The fatty ester quaternary ammonium compound (A) has the formula (II): The fabric softener composition according to claim 1, which is represented by: 3. 3. The fabric softener composition according to claim 2, wherein the diester quaternary ammonium compound is N-methyl-N, N, N-triethanolamine ditallow ester quaternary ammonium methosulfate. 4. Wherein the emulsifier is an ethoxylated C ₁₃ -C ₁₅ fatty alcohols having per mole of alcohol ethoxyl group 20 moles, claim 2 fabric softener composition. 5. The fabric of claim 1, wherein the amount of component (A) in the composition is from about 1% to about 20% by weight and the amount of component (B) is from about 0.1% to about 8% by weight. Softener composition. 6. A method of imparting flexibility to a fabric, comprising contacting the fabric with an effective amount of the fabric softener composition of claim 1. 7. 7. The method of claim 6, wherein said fabric is contacted during a rinse cycle of an automatic laundry washing machine. 8. 7. The method of claim 6, wherein the fabric is contacted during hand washing or rinsing.