BRPI0618694A2 - bad odor reduction method - Google Patents

Abstract

The present invention is directed to methods of reducing fabric malodor, comprising applying a water-soluble soil release polymer (SRP), as well as compositions comprising such polymers.

Description

"BAD ODOR REDUCTION METHOD" CROSS REFERENCE TO RELATED APPLICATION

The present invention claims the benefit of United States Provisional Patent Application No. 60 / 737,644 filed November 17, 2005, the contents of which are hereby incorporated by reference in their entirety.

BACKGROUND OF THE INVENTION

Liquid fabric softener compositions are typically used in the washing cycle of washing machines to impart antistatic properties to washed fabrics, to provide desirable scents and to provide fabrics with a texture that is soft, smooth, and flexible to the touch. Similarly, sheets containing fabric softeners are typically used in clothes dryers, and fabric softener is supplied to the fabrics by repeated contact during the drying process. Conventional softeners can mask odors but not remove them completely.

Bad body odors provide offensive odors by impregnating fabrics and clothing. Such bad odors may persist even after washing. Bad body odors have a particular tendency to impregnate synthetic materials (which are often hydrophobic), and therefore tend to have a higher affinity for tallow. Bad odor components also tend to be extremely difficult to remove from synthetic materials, and are often slowly released even after washing fabrics and clothing.

Accordingly, there is a need for compositions that are effective in controlling bad odor on fabrics as well as effective compositions in reducing bad odor on fabrics after washing fabrics and clothing.

BRIEF SUMMARY OF THE INVENTION A method of reducing bad odor comprising:

(a) applying a dirt release polymer (SRP) composition to an aqueous solution in a fabric; and

(b) rinsing said tissue; wherein said SRP composition is substantially free of anionic surfactants and / or reinforcing salts.

A method of reducing bad odor comprising:

(a) apply a dirt release polymer (SRP) composition to an aqueous solution with a fabric softening component in

a surface; and

(b) rinsing said surface;

wherein said SRP composition is substantially free of anionic surfactants and / or reinforcing salts.

DETAILED DESCRIPTION OF THE INVENTION

As used throughout this description, banners are a

stenography to describe each and every value within the range. Any value within the range can be selected as the range termination. In addition, all references cited herein are hereby incorporated by reference in their entirety.

Percentages given below are percent by total weight unless otherwise indicated.

In certain embodiments, the present invention provides methods of reducing bad odor comprising applying a composition comprising a dirt releasing polymer to an aqueous solution in a fabric. The dirt releasing polymer (SRP) may be a copolymer of a water soluble polyether and a polyester, for example a cellulose polyester polymer or a polyethylene glycol polyester such as 1,4-benzene dicarboxylic acid polymer with 1,2-ethanediol and alphahydro-omegahydroxy-poly (oxy-1,2-ethanediyl). In certain embodiments, the dirt release polymer is water soluble. In certain embodiments, the dirt releasing polymer is nonionic.

In certain embodiments, the composition comprising SRP for use in the method of the invention is not a component of a laundry detergent, i.e., the formulation comprising SRP is substantially free of anionic surfactants and / or substantially free of reinforcing salts.

In certain embodiments, the invention provides methods of performing one or more of the following results: reducing bad odor accumulation, reducing bad odor, reducing bad odor perception, or inhibiting bad odor deposition on fabrics.

In certain embodiments, the methods of the present invention comprise the step of applying a composition comprising a dirt release polymer to an aqueous solution in the fabric. In various embodiments, the methods may comprise any of the following: subjecting a tissue into an aqueous solution comprising SRP; adding the composition comprising the SRP to the wash cycle of a washing machine while the fabric is being rinsed; adding the composition comprising the SRP in water and not directly on the fabric; spraying the composition comprising the SRP onto the tissue; rinse tissue after SRP application; and other similar methods of contacting tissue with SRP.

As used herein, the term "fabric" includes fabrics comprising natural fibers, such as, e.g., cotton, wool, silk or mixtures thereof. In other embodiments, the fabric comprises synthetic fibers such as, e.g., polyester, spandex / nylon, viscose, satin, velvet, acetate, acrylic and the like. The fabric may also comprise a blend or combination of natural and synthetic fibers. The fabric may be any conventional manner; e.g., woven, nonwoven or pressed. It should be noted that as used herein, "fabric" includes items that are typically dressed as clothing or otherwise come into contact with the human body. For example, plastic, vinyl, polymers such as poly (vinyl chloride), chair surfaces, car seats, protective sports wear (eg, protective pads, helmets and gloves) are examples of fabrics that can be treated accordingly. with the methods of the present invention. In various embodiments, the bad odor to be treated is bad odor of human body.

In certain embodiments, the present invention provides fabric softening compositions comprising:

(a) one or more water soluble dirt release polymers (SRPs), eg polymers of a water soluble polyether and a polyester, such as a nonionic polymer, for example a cellulose polyester polymer or a polyester of polyethylene glycol, such as 1,4-benzene dicarboxylic acid polymer with 1,2-ethanediol and alphahydro-omegahydro-poly (oxy-1,2-ethanediyl) (eg, Sorez ™ 100, available from International Specialty Products, Wayne, New Jersey, USA); and

(b) one or more fabric softening components, e.g., a quaternary ammonium compound, e.g., a polyquat or an esterquat, for example a triethanolamine esterquat, e.g. a triethanolamine esterquat tallow;

wherein the composition is substantially free of anionic surfactants and / or substantially free of reinforcing salts.

The amount of the components of the present compositions depends on whether a given composition is concentrated or diluted, as well as the precise selection of components. Thus, the fabric softener component may be, for example, from about 0.1 to about 40% of the total weight of the composition in certain embodiments, about 0.5 to about 25% of the total weight of the composition in other embodiments. eg, about 6 to about 24% for a concentrated composition or about 1.5 to about 6% for a diluted composition.

The dirt release polymer (SRP) may be present in an amount of, for example, from about 0.1% to about 40% in certain embodiments, about 0.5 to about 10% of the total weight of the composition. other embodiments, about 1 to about 6% of certain embodiments directed to a concentrated composition, or about 0.2 to about 1.2% of the total weight of certain embodiments directed to a diluted composition.

Preferably the weight ratio of fabric softener component to SRP is about 30: 1 to about 1:30. In various embodiments, the ratio is about 2: 1. at about 20: 1, or about 3: 1 to about 10: 1.

The composition may further comprise one or more chelators, colorants (eg, dyes or pigments), fatty alcohols (e.g., a C16-18 fatty alcohol), preservatives (e.g., lactic acid) and / or perfumes, and / or other ingredients as known in the art of fabric softening compositions. For example, in certain embodiments, the compositions further comprise a chelator which is amino trimethylene phosphonic acid.

In certain embodiments, the compositions are in an aqueous solution. In such embodiments, the compositions may be diluted by water in amounts of, for example, from about 1: 1 to about 1: 1000 by weight, or about 1: 1 to about 1: 1000 by volume.

In certain embodiments, the present invention provides a fabric softening composition as described above, wherein the water-soluble dirt-releasing polymer is a polyethylene glycol polyester. The polyethylene glycol polyester may be, for example, a 1,4-benzene dicarboxylic acid polymer copolymer with 1,2-ethanediol and alpha-hydroxy;

omegahydroxy-poly (oxy-1,2-ethanediyl).

In certain embodiments, the fabric softener component is

an esterquat.

Such esterquat may be, for example, a compound of Structure 1 shown below:

<formula> formula see original document page 7 </formula>

STRUCTURE 1

R1 represents (CH2) t R6 where R6 represents benzyl, phenyl,

(C1 -C4) alkyl-substituted phenyl, OH or H;

R 2 and R 3 represent (CH 2) 3 -R 5 where R 5 represents an acyloxy group containing from 8 to 22 carbon atoms, benzyl, phenyl, (C 1 -C 4) phenyl

substituted alkyl, OH or H;

R4 represents an aliphatic hydrocarbon group having from 8 to 22 carbon atoms;

q, s, and t each independently represent a number

integer from 1 to 3; and

X- A softener compatible anion. In certain embodiments, R 1 is C 1 -C 4 alkyl (e.g., methyl). In certain embodiments, R 2 and R 3 are independently or both p-C 8 -C 22 -acyloxyoxyethyl or β-hydroxyethyl. For example, in one embodiment, one of R 2 and R 3 is p-C 6 -C 22 -acyloxy oxyethyl and the other is β-hydroxyethyl. In certain embodiments, q and s are 2. In certain embodiments, X- is sulfate.

In certain embodiments, esterquat is a triethanol amine esterquat (e.g., a triethanol ammonium methyl sulfate dialkyl ester). In certain embodiments, the fabric softener component is a triethanolamine esterquat in amounts of from about 10 to about 20%. In certain embodiments, the fabric softener component is a polyethylene glycol polyester polymer in amounts of from about 1 to about 6% by weight. In certain embodiments, the compositions comprise: (a) a triethanolamine esterquat in amounts from about 2.5 to about 5% by weight; and (b) a polyethylene glycol polyester polymer in amounts from about 0.2 to about 1.5% by weight.

The invention further comprises the use of a dirt release polymer (SRP), e.g., a polyethylene glycol polyester polymer as described herein, to control bad odor. In certain embodiments, the invention is further directed to a method of conditioning fabric comprising applying a composition as taught herein to a fabric when the fabric is being rinsed with water.

The present invention is related to the totally innovative and surprising benefit that is provided by the dirt-releasing polymers (SRPs) in the rinse cycle with fabric conditioning compositions. SRPs are compounds that can be used in detergent compositions to provide benefits, such as grease stain removal and stain anti-redeposition, specifically on hydrophobic fabrics such as synthetic fibers, e.g., polyester. However, it has been further found here that the use of SRPs in fabric softening compositions inhibits the deposition of human sebum and sweat on fabrics (especially synthetic fabrics), inhibits the absorption of bad odor into tissues, and reduces the perception of bad odors. while improving the perception of freshness. SRPs may also prevent and / or inhibit the build-up of foul odors such as perspiration and sebum in such tissues. SRPs may have often in the past comprised water insoluble components, such as polyesters, and were not used in fabric softening compositions. Additionally, because SRPs were present in laundry detergents, there was no motivation to add SRPs to fabric softener compositions. Certain embodiments of the present invention are directed to fabric softening compositions having a water soluble SRP.

As used herein, the terms "dirt releasing polymer" or "SRP" are used interchangeably, and may include polymers that are absorbed onto fabric fibers where they counteract the act of re-soiling the fibers. The dirt-releasing polymer may be a copolymer of a water-soluble polyether and a polyester, for example a cellulose polyester polymer or a polyethylene glycol polyester such as 1,2-benzene dicarboxylic acid polymer -ethanediol and alphahydro-omegahydroxy-poly (oxy-1,2-ethanediyl). Such polymers may include terephthalic acid polyesters and copolymers, ethylene glycol polyesters and copolymers, ethylene glycol and benzene copolymers, and poly (ethylene terephthalate). Polymers may include nonionic polyesters. The polymers may be modified whereby a portion of the ethylene glycol is removed and replaced with a high molecular weight hydroxy-terminated polyethylene glycol.

In certain embodiments, SRP is hydrophilic, or may be miscible or water soluble for any reason. In various embodiments, the SRP in the present invention is water soluble, for example, readily soluble in cold, dead, and hot water. Preferred SRPs may also be a polyethylene glycol and polyester or polyester and cellulose ether polymer.

In certain embodiments of the invention, the SRP used is a 1,4-benzene dicarboxylic acid polymer with 1,2-ethanediol and alphahydro-omegahydroxy-poly (oxy-1,2-ethanediyl). In certain embodiments, the SRP used is a polyethylene glycol polyester. In certain embodiments, a water soluble SRP is used, for example one that may be purchased from International Specialty Products (Wayne, New Jersey, USA) under the tradename Sorez ™ 100. In other embodiments, the used SRP may be obtained from Clariant GmbH (Sulzbach, Germany) under the tradename TexCare SRN .170. In certain embodiments, the present invention comprises from about 0.1% to about 40% by weight of an SRP component.

In certain embodiments, the SRP is about 0.1% to about 40% of the total weight of the composition; in other embodiments about 2 to about 6% of the total weight of the composition, in other embodiments about 0.5 to about 2% of the total weight of the composition.

Fabric softeners may contain a fabric softener component, and optionally may contain additional components including perfumes, chelators, preservatives, dyes, or thickeners. Other optional ingredients may also include, without limitation: solvents, alcohols, amphoteric and nonionic surfactants, fatty alcohols, fatty acids, organic or inorganic salts, pH buffers, defoamers, germicides, fungicides, antioxidants, corrosion inhibitors, enzymes, optical brighteners, defoamers, and their combinations and other materials known in the art.

In certain embodiments, the present invention is substantially free of anionic surfactants and / or reinforcing salts. As used herein, "substantially free" means, in various embodiments, less than about 5 wt%, less than about 1 wt%, less than about 0.5 wt% or less than about 0.1% by weight of a given component.

Anionic surfactants include those known in the art, for example lithium dodecyl sulfate or sodium dodecyl sulfate. Water soluble reinforcing salts known in the art include, for example, alkali metal phosphates, e.g. sodium phosphate and potassium phosphate. In various embodiments, the compositions of the present invention are substantially free of any anionic surfactants, water soluble reinforcing salts or both.

The fabric softeners of the present invention include fabric softener components known in the art. Suitable fabric softening components may include, without limitation: cationic surfactants, quaternary ammonium salts (eg, acylate quaternary ammonium salts, quaternary ammonium ester salts, cyclic quaternary ammonium salts, diammonium quaternary ammonium salts, biodegradable quaternary ammonium, polymeric ammonium salts), polyquats, tertiary fatty amines, carboxylic acids, esters of polyhydric alcohols, fatty alcohols, ethoxylated alkyl phenols, ethoxylated fatty acid ethoxylated ethoxylated fatty acids, ethoxylated fatty amines mineral oils, clays, and polyols and mixtures thereof. In certain embodiments, the fabric softener component includes a quaternized fatty acid triethanol amine ester salt, e.g., a triethanol amine esterquat tallow. In certain embodiments, the fabric softener component of the present invention may include a triethanol ammonium methyl sulfate dialkyl ester, or a dihydrogenated seboyl ethyl hydroxy ethyl ammonium methosulfate. Preferred fabric softening components can be purchased from Kao Corporation (Japan) under the product name Tetranil Ll / 90.

In certain embodiments, the compositions comprise about 0.01% to about 35% by weight of one or more fabric softener components. In certain embodiments, the compositions comprise from about 0.1% to about 25% by weight of one or more fabric softener components. In certain embodiments, the compositions comprise from about 1.5% to about 6% of one or more fabric softener components. In other embodiments, the compositions comprise from about 6% to about 24% of one or more fabric softener components. In certain embodiments, the compositions of the present invention are useful as fabric softeners which may be added to the rinse cycle of a laundry process.

The fabric softening compositions of the present invention may be applied to fabrics, e.g., clothing, using a variety of methods. In certain embodiments, SRPs are highly water soluble. Consequently, the SRP may be incorporated into an aqueous solution, and the aqueous solution may be added to the rinse cycle of a washing machine. The fabric softening compositions of the present invention may be diluted within the range of from about 1: 1 to about 1: 1000 in water when added to the wash cycle of a washing machine. In alternative embodiments, the SRP may be dissolved in water to produce a solution of from about 0.0005% to about 40% by weight, and sprayed onto the tissues. Alternatively, the SRP may be in an aqueous solution and may be sprayed or applied on fabrics and hard surfaces. Alternatively, the SRP may be in the continuous phase of an oil-in-water emulsion, and may be sprayed or applied on fabrics and hard surfaces. Alternatively, the SRP may be in the discontinuous phase of a water-in-oil emulsion, and may be sprayed or applied to fabrics and hard surfaces. In such embodiments, excess liquids may then be removed from hard tissues or surfaces by rubbing.

Chelating agents are known in the art, and may be present in the compositions of the present invention, in various embodiments at a level of at least about 0.001% by weight of the fabric softener composition, about 0.001 to 0.5% of the composition, about from 0.003 to about 0.5% or 0.005% to 0.25%. Chelating agents useful in the present invention include, without limitation: amino carboxylic acid compounds and organic amino phosphoric acid compounds, and mixtures thereof. Suitable amino carboxylic acid compounds may include: ethylene diaminetetraacetic acid, N-hydroxyethylene diamino triacetic acid, and diethylene triamine pentaacetic acid. Suitable organic amino phosphonic acid compounds may include, for example, methylene phosphonic acid, 1-hydroxyethane-1,1-diphosphonic acid, and amino trimethylene phosphonic acid. In certain embodiments, the chelating agent used is an amino trimethylene phosphonic acid, which may be obtained from Solutia, Inc. (St. Louis Missouri Missouri USA) under the tradename Dequest 2000. In various embodiments, the compositions may comprise a chelator. in amounts from 0% to about 10%, about 0.01% to about 1%, or about 0.01% - 0.5% of a fatty alcohol.

Preservatives that may be useful in the present invention include lactic acid, formaldehyde, or other preservatives known in the art. In various embodiments, the compositions may comprise 0 to about 10% by weight of a preservative, about 0.01% to about 2%, or about 0.05% to about 5%.

Fatty acids useful in the present invention may include one or more carbon chains that are fully saturated or unsaturated. In certain embodiments, fatty alcohols are present and include C10 -C20 alcohols, e.g., C16 -C18, C13 -C15 alcohols, and mixtures thereof. The present invention may comprise, in various embodiments, from 0 to about 10% by weight of a fatty alcohol, from about 0.01 to about 5%, from about 0.05 to about 1%, or from about 0.1 to about 10%. about 0.5% of a fatty alcohol.

Dyes and perfumes are known in the art. Perfumes include odorous materials that are capable of providing a fabric-pleasant fragrance, and the term "perfume" includes conventional materials commonly used in detergent compositions to counteract a bad odor in such compositions and / or provide a pleasant fragrance thereto. Perfumes may be liquid at room temperature, although solid perfumes may also be used. Perfumes may include, for example, aldehydes, ketones, esters and the like which may be used to impart a pleasant fragrance to granular and liquid detergent and fabric softening compositions. Perfumes useful in the present invention may have relatively simple compositions or may comprise complex mixtures of natural and synthetic chemical components, all of which are intended to provide a pleasant odor or fragrance when applied to fabrics. In various embodiments of the present invention, dyes and perfumes comprise 0 to about 5%, about 0.01 to about 3% or about 0.05 to about 1% of the composition.

As shown in the Examples, the compositions of the present invention demonstrate that tissue treated with an SRP provides significant freshness benefits and perceived body odor control over different tissue types (e.g., synthetic and regenerated cellulose). EXAMPLES Example 1

The following compositions are prepared by mixing in deionized water (percentages expressed as percent of total weight):

<table> table see original document page 14 </column> </row> <table>

Example 2

Thirty-six patches of polyester, nylon / Lycra, and

viscose are cut into 25 cm χ 25 cm leaves. The fabrics are washed in a washing machine at 50 ° C with detergent. During the rinse cycle, half of the tissues are treated with FC # 1, and half of the tissues are treated with FC # 2. The fabrics are dried in an electric rotary drum dryer.

1.6 grams of artificial sweat dirt and 1.6 grams of tallow dispersion (compositions given in Tables 1 and 2) are sprayed onto each fabric, and the fabrics are dried for 30 minutes on a clothesline. The fabrics are again washed in the washing machine and during the rinse cycle, the FC # 1 treated fabrics are treated with FC # 1, and the FC # 2 treated fabrics are treated with FC # 2. The fabrics are dried in an electric rotary drum dryer. The soiling and washing cycle is repeated several times.

Table 1: Artificial Sweat Composition

<table> table see original document page 15 </column> </row> <table>

Table 2: Tallow Dispersion Composition

<table> table see original document page 15 </column> </row> <table>

A panel of 18 judges is required to compare the fabrics.

FC # 1 treated and FC # 2 treated tissues after 5 and then 10 soiling and wash cycles for both wet and dry tissues and during ironing after 10 soiling and wash cycles to give your sensory preference (if any) for each tissue. The results of the comparison are given below in Tables 3 - 7, the first number being the number of judges preferring CF # 2 treated tissues; the second number being the number of judges preferring the CF # 1 treated tissues, and the third number being the number of judges without preference between the FC # 1 and FC # 2 treated tissues. The probability that tissues treated with FC # 1 and FC # 2 are different is given in parentheses. Table 3: Evaluation of FC # 1 and FC # 2 treated and soiled tissues after 5 tallow and sweat applications

<table> table see original document page 16 </column> </row> <table> Table 4: Evaluation of FC # 1 and FC # 2 treated, dirty and dry tissues after

tallow and sweat applications

<table> table see original document page 16 </column> </row> <table>

Table 5: Evaluation of Moist, Dirty, CF # 1 and FC # 2 Treated Tissues

<table> table see original document page 16 </column> </row> <table>

Table 6: Evaluation of FC # 1 and FC # 2 treated, soiled, dry tissues after tallow and sweat applications

<table> table see original document page 16 </column> </row> <table>

Table 7: Evaluation of tissues treated with FC # 1 and FC # 2 after 10 applications.

<table> table see original document page 16 </column> </row> <table>

FC # 2, which contains 1% polyester polyethylene glycol, has been shown to have a benefit over FC # 1 in the perception of freshness and reduced perception of bad body odors after 5 and 10 cycles on wet and dry (clothesline dry) tissues. ). Example 3

The following composition is prepared by dissolving components in deionized water:

<table> table see original document page 16 </column> </row> <table> Example 4

The following composition is prepared according to the present

invention. Quantities are percentage by weight:

<table> table see original document page 17 </column> </row> <table>

Example 5

Up to 40 grams of Sorez ™ 100 is dissolved in 60 grams of deionized water to produce a 40% SRP solution. The solution is added to a spray bottle, and sprayed onto a fabric to provide bad odor resistance properties.

Claims (12)

1. Bad odor reduction method, comprising: (a) applying a dirt-releasing polymer (SRP) composition to an aqueous solution on a fabric; and (b) rinsing the fabric; wherein the SRP composition is substantially free of anionic surfactants and / or reinforcing salts. Method according to claim 1, characterized in that said dirt-releasing polymer is polyethylene glycol polyester. Method according to claim 1, characterized in that said dirt-releasing polymer is 1,4-benzenedicarboxylic acid polymer with 1,2-ethanediol and alphahydro-omegahydroxy-poly (oxy). -1,2-ethanediyl). Method according to claim 1, characterized in that said bad odor is bad odor of human body. Method according to claim 15, characterized in that said fabric comprises synthetic fibers. Method according to claim 1, characterized in that said fabric comprises polyester, spandex, viscose, nylon, satin, velvet, acetates, acrylics, or mixtures or blends thereof. Method according to claim 1, characterized in that said SRP is provided in the rinse cycle of a washing machine while said fabric is being rinsed. 8. A bad odor reduction method, comprising: (a) applying a dirt-releasing polymer (SRP) composition to an aqueous solution with a fabric softener component on a surface; and (b) rinsing said surface; wherein said SRP composition is substantially free of anionic surfactants and / or reinforcing salts. A method according to claim 8, characterized in that said fabric softener component is a triethanol amine esterquat. A method according to claim 8, characterized in that said fabric softener component has the structure: wherein R1 represents ( CH 2) t R 6 where R 6 represents benzyl, phenyl, (C 1 -C 4) alkyl-substituted phenyl, OH or H; R 2 and R 3 represent (CH 2) s -R 5 where R 5 represents an acyloxy group containing from 8 to 22 carbon atoms, benzyl, phenyl, (C 1 -C 4) alkyl-substituted phenyl, OH or H; R4 represents an aliphatic hydrocarbon group having from 8 to 22 carbon atoms; q, s, and t each independently represent an integer from 1 to 3; and X- a softener compatible anion. A method according to claim 8, characterized in that the weight ratio of fabric softener component to dirt release polymer is about 30: 1 to about 1:30. A method according to claim 8, further comprising a component chosen from a chelator, dye, fatty alcohol, preservative or perfume.