KR100443390B1 - Hand cleaner - Google Patents

Abstract

The present invention provides an aqueous detergent formulation comprising a mixture of paramentadiene and at least one surfactant and / or solubilizer. The inventors have found that such formulations can remove a wide range of thick dirt from the skin surface, while leaving a minimal residual odor.

Description

Hand cleanser

The present invention relates to cleaning agents, in particular so-called "water free" hand cleaners and abrasive hand cleaning products impregnated with such cleaners.

Conventional hand wash formulations include solvents and / or surfactants capable of solubilizing or emulsifying dirt present on the skin surface. However, the cleaning power of such formulations is limited, especially when dealing with the removal of various thick, deeply cut dirts that may be experienced by industry workers.

Many hand cleaners currently in use are in the form of gels that can include polar and nonpolar materials mixed together to achieve removal of various dirt from the skin surface. These often contain abrasive particles that assist in scrubbing the skin surface upon removal of deeply cut dirt. One disadvantage associated with using such gels is the need to wash away gel residues or excess cleansers from the skin after use. This means that in the case of industrial hand cleaning, the hand cleaner takes a long time, which in turn increases the cost.

Another drawback associated with using gels is that, depending on the formulation, they tend to remove the skin's inherent protective lipids, especially if the gel residues are washed once the detergent is used repeatedly, leaving the skin to dehydrate. It is left in a protected state. This is especially a problem in low humidity areas.

One solution to this problem has been provided in the form of a "waterless" formulation that can be used to clean the skin surface without the need to add any water during the actual hand washing process.

Formulations of d-limonene based formulations as "waterless" formulations of this type are described in European Patent Publication No. 615720. However, such formulations contain a particularly dense citrus odor, leaving an undesired, long-lasting residual citrus odor after use. In addition, such formulations are believed to have only a limited tendency to moisturize or moisturize the skin again after cleaning. Since d-limonene is extracted from orange peel, it is relatively expensive. In addition, their availability depends on crop yields, and therefore undergoes fluctuations.

Thus, there is a need for an improved "water free" cleanser with a low residual odor that can remove a wide range of thick dirt from the skin surface, while preferably moisturizing the skin at the same time.

The inventors have now surprisingly found that a mixture of paramentadiene can serve as an effective solvent for oily smooth deposits, while at the same time moisturizing the skin and leaving no long lasting residual odor on the skin surface. .

According to one aspect of the present invention, the present invention thus comprises an aqueous detergent formulation comprising a mixture of paramentadiene, preferably with one or more surfactants and / or solubilizing agents in an amount of 1 to 20% by weight. to provide.

Suitable for use in the formulations of the present invention are α-terpinene, γ-terpinene, which may be present in amounts of 30-50%, 10-25%, 15-35% and 1-10% by weight, respectively. Mixtures of paramentadiene including iso-terpinolene and camphor. Preferably, α-terpinene is present in an amount of 35 to 45% by weight, γ-terpinene is 15 to 20% by weight, iso-terpinolene is 20 to 25% by weight, and camphor is 3 to 8% by weight. .

The paramentadiene mixture may also be present in one or more of the following paramentadienes, ie limonene, terpinolene, α-phellandrene, which may each be present in amounts of up to 10% by weight, preferably up to 5% by weight and β-phellandrene.

Particularly suitable for use in the formulations of the invention are mixtures of the paramentadiene isomers of Bush Boake Allen Ltd. sold under the trade name TABS DS. It is a mixture of natural paramtadiene including α-terpinene, γ-terpinene, iso-terpinolene, limonene, terpinolene, α-phellandrene, β-phellandrene, camphor and other trace isomers to be.

Preferred formulations according to the invention are those in which the paramentadiene mixture is present in an amount of 1 to 10% by weight, especially 5 to 10% by weight.

The paramentadiene mixture acts as an effective solvent for a wide range of thick contaminants, including oily, grease deposits such as petroleum oils, vegetable oils, greases and tars, and any suitable solubilizers and / or surfactants or surfactant mixtures And may be used in combination. Suitable solubilizers for use in the formulations of the present invention include oil-based emulsifiers, such as PPG-40 hydrated castor oil and PPG-1-PEG-, which minimize the dehydration of the skin involved by placing an oily or dry protective film on the skin. 9 lauryl glycol ether.

Surfactants suitable for use in the formulations of the present invention may be natural nonionic, ionic or amphoteric surfactants only requiring emulsifying the paramentadiene and any other components present in the formulation requiring emulsification. have. Any conventional surfactant or surfactant mixture can be used.

Solubilizers may be present in amounts up to 15% by weight. An amount of about 12% by weight has been found to be suitable.

In a preferred embodiment, the formulations according to the invention further comprise at least one further organic solvent in an amount of 1 to 10% by weight, preferably 2 to 6% by weight. Such solvents can preferably improve the cleaning efficiency of the formulation by solubilizing polar contaminants such as paints and adhesives from the skin. Suitable cosolvents include glycol ethers such as PPG-2 methyl ether, PPG-1 n-propyl ether, PPG-2 n-butyl ether, PPG-2 dimethyl ether and ethyl lactate, butyl lactate, ethylhexyl lactate and the like. There is lactate of.

Additional ingredients that may be present in the formulations of the invention include antioxidants such as butylated hydroxytoluene (BHT); Flavorings such as orange citrus flavor, lemon flavor or flower flavor; Emollients such as aloe barbadensis gel; Antimicrobial agents such as methyldibromo glutaronitrile, which are usually supported on a carrier such as phenoxyethanol; There are other standard antioxidants, emollients and preservatives.

Antioxidants such as BHT have been shown to stabilize the paramethadiene mixture against oxidation and may be present in the formulation in amounts of up to 0.5% by weight.

The formulations according to the invention can be prepared by any conventional method, for example by simple mixing of the components. Typically, as a first step, a mixture of paramentadiene can be mixed with the surfactant and / or solubilizer and water, after which additional ingredients are added to entail further mixing. Paramethadiene is a renewable resource because it is readily available as a byproduct of making pine pulp.

Abrasive hand cleaning materials, more commonly known as wet wipes, can clean deeply cut dirt from the skin without the need for rinsing off. Such materials are mainly made from air-deposited cellulose fibers that can be saturated with a suitable cleaning solution. We have found that the formulations are particularly effective at removing thick contaminants when incorporated into abrasive hand cleaning materials.

Thus, according to another aspect of the invention, the invention is a support having at least one abrasive surface, impregnated with an aqueous cleaning fluid comprising a mixture of paramentadiene and at least one surfactant and / or solubilizer. It provides an abrasive cleaning material comprising a. The cleaning action is achieved by the cleaning fluid and the polishing action is achieved by the polishing surface of the support, which results in a gentle cleaning action on the skin due to the material, helping to remove deeply cut contaminants.

The support may comprise a stream of towels consisting of a pore system capable of absorbing and retaining the aqueous cleaning fluid but easily releasing the fluid to the skin surface during use.

Typically, a plurality of abrasive towels, including cleaning formulations, are provided in either a stack or a continuous perforated roll that can easily separate individual towels along each perforation line. The towel may be provided in a container where an aqueous formulation is added to wet the towel. The capillary action ensures that the cleaning fluid is evenly distributed throughout each stack or roll containing a sufficient amount of detergent to completely clean the skin. Alternatively, the abrasive material is immersed before or during the conversion process to a laminate or roll.

Thermoplastic nonwoven webs can be used as abrasive supports for cleaning formulations. They can be prepared by meltblowing or spunbonding techniques well known in the art, for example in US Pat. Nos. 3,78185 and 3692618.

Meltblowing techniques are preferred for producing the abrasive cleaning materials of the present invention. This technique involves extruding a plurality of continuous thermoplastic polymer strands in a downward direction through a plurality of die orifices, crushing the extruded polymer strands, and dispersing them in individual fibers by forced airflow before being deposited on a moving collection surface. do. In addition, the fibers are substantially cooled by air to prevent all significant bonding between the individual fibers. Bonding of the web to maintain integrity and strength occurs in a separate downward action. Meltblown webs formed in this way are characterized by a degree of wear resistance and ductility, bulk, absorbency and low porosity.

Meltblown webs or sheets suitable for the wipes of the present invention are well known in the nonwovens industry. Although other thermoplastic polymers such as polyethylene, poly (ethylene terephthalate), poly (butylene terephthalate), polymethylpentene, polycaprolactam and propylene ethylene copolymers can also be used, these materials are typically made of polypropylene. do. Preferably, the polymer is present in an amount of 15 to about 200 grams, more preferably about 35 g / m 2, per square meter of material. Due to the unique properties of the meltblown web, not only the liquid detergent is retained through capillary action, but also the liquid detergent can be quickly delivered to the meltblown web in close contact. At the same time, the web can easily deliver the liquid detergent onto the skin during use, and also helps to separate the liquid from the skin as well as trap the removed dirt between the fibers after cleaning.

In order to increase the strength of the resulting material, one or more meltblown layers may be supported on a spunbonded supportive web, if desired. Such materials exhibit the strength of the spunbond web while maintaining the abrasiveness of the meltblown layer.

Preferred abrasive supports are large-fiber / fine fibrous meltblown double weaves described in US Pat. No. 4,558,558,483,003,485,331 and European Patent Publication No. 256950. The terms "large fibers" and "fine fibers" are used herein to distinguish webs having different pore size distributions. "Large fiber" meltblown refers to a web in which up to 65% of the pore volume can be attributed to pores having a size of about 20 to about 60 microns. "Fiber" meltblown refers to a web at which at least 65% of the pore volume is due to pores having a size of about 20 to about 60 microns.

Particular preference is given to large fiber / fine fiber polypropylene meltblown double weaves comprising 28% by weight large fibers and 72% by weight fine fibers.

The amount of liquid detergent in each wipe or sheet is about 100 to about 500 weight percent, suitably about 150 to about 500 weight percent, preferably 200 to 450 weight percent, more preferably about 340 to 400 weight percent, 350% by weight is more preferred. If the amount of detergent is too small, the wipe will be too dry in this case and will be unsuitable for cleaning the skin. If the amount of detergent is too high, the wipe may be too wet in this case, simply tending to "push" the skin contaminant deposits over the skin. The detergent fluid may also begin to collect in the container.

The invention will now be further illustrated by the following non-limiting examples.

<Example 1>

Hand cleaner formulation

The components were mixed in a given ratio to form a liquid detergent. The present inventors have found that using this cleaner results in subjective hand wash testing of asphalt based artificial dirt, scrub crude (SCRUB CRUD®), TUFLUBE®, marker pen ink and dry acrylic based paints. It was found to be particularly advantageous at the time of removal. Water was not needed to remove any excess detergent from the hand and was simply wiped off with a towel or cloth.

The cleaning agent gave the hands a clean, soft, early pleasant citrus odor with a rapid removal of the least pleasant residual "soap" residue left.

<Example 2>

Hand cleaner formulation

The components were mixed in a given ratio to form a liquid detergent. The detergent gave the hands a clean, soft, early pleasant citrus odor with the rapid removal of the minimal pleasant `` soap '' residual odor left behind.

<Example 3>

Detergent formulations with "wet wipes"

A large fiber / fine fiber polyethylene meltblown double weave (1.02 osy) consisting of 28% by weight large fibers and 72% by weight fine fibers was prepared according to European Patent Publication No. 0573277. They were then impregnated with each of the detergent formulations of Examples 1 and 2 at a rate of 3.5 g of formulation per gram of meltblown double weave.

When used in the hand wash test, there was no need to use any cloth to remove excess detergent. The use of a "wet wipe" gave the hands a clean, soft, early pleasant citrus odor that quickly eliminated the least pleasant residual "soap" residue left.

<Example 4>

Cleansing efficiency and skin moisturizing of detergent formulations with “wet wipes”

The meltblown double weave of Example 3, impregnated with the detergent formulation of Example 2 in a ratio of 3.5: 1, was tested as follows.

1. Cleaning efficiency

Wet wipes were tested for cleaning efficiency using a Gardner Washability Test Apparatus. Various dirt was applied to the 50 square mm 2 sections of the woven vinyl support. The contaminated panel was then mechanically cleaned with an abrasive surface wrapped with a wet wipe around a block of weight 469 g, designed to simulate the effect of the pressure applied upon hand washing. The panels were cleaned for a fixed number of cycles depending on the specific contaminants during the test.

The dirt-washed area of the vinyl support panel was evaluated using a color meter and compared with the initial reflectance (white) of the vinyl support before contamination. The final reflectance after washing | cleaning was made into the average of many records. The cleaning efficiency is the final reflectance ratio to initial reflectance. Typically, this test was repeated five times to obtain an average result.

<Result>

2. Moisturizing Skin

Tests were conducted to determine the effect of wet wipes on skin conductance compared to conventional products. Conductance is a measure of the moisture level in the skin. The higher the record, the higher the water content of the stratum corneum.

Twenty subjects were employed to conduct the test.

Basic conductance measurements were performed by washing and drying the skin in each of the four regions (two left and two right) of the test subject's arm. Five records were recorded for each region. Each area was wiped with a test product. After 30 minutes, conductance was measured in each region. The difference between the mean test measurement and the mean baseline measurement was obtained.

<Result>

These results indicate that the wet wipe according to the present invention promotes skin moisturization.

Example 5

Hand cleaner formulation

<Example 6>

Cleaning efficiency of detergent formulations with “wet wipes”

The meltblown double weave of Example 3, impregnated with the detergent formulation of Example 5 at a ratio of 3.5: 1, was tested as follows.

<Test 1>

The cleaning efficiency of the wet wipes was evaluated using a Gardner Washability Test Apparatus according to the method described in Example 4.

<Result>

<Test 2>

Wet wipes were evaluated by 10 panelists using selected contaminants to represent the extent of industrial contaminants typically encountered in the workplace. The method used was according to U.S Military Specification Mil-H-43606, where a fixed amount of contaminant was applied to the hand and left for a period of time. Subsequently, after washing the hands for a certain time, the washing ability was evaluated.

Wet wipes were visually graded by panels for cleaning efficiencies based on the following grades. The higher the number, the better the cleaning efficiency.

The ratio was calculated from the cleaning efficiency grade after the time determined as follows.

Percentage of Total Possible Score (%) / hour (minutes)

Where percentage of total score = (efficiency class-1) / 3 x 100

The ratio is the amount of product removed at a fixed time. The higher the number, the faster the product washes hands.

<Result>

Wet wipes were also evaluated using the Gardner Washability Test Apparatus. Dirt was applied to a 4 "x 18" (10.16 cm x 45.72 cm) woven vinyl support. The contaminated panel was then mechanically cleaned using a wet wipe wrapped around the block. The panels were cleaned with a polished surface of meltblown double weave during a fixed cycle depending on the contaminants under test. Cleaning was stopped at the midpoint, the wipes were removed, repositioned to a clean area, and replaced before resuming to prevent saturation or blockage of the wipes.

The removal of dirt depends on the degree of grading given below and all visually evaluated using a reflectometer. For the latter, the initial reflectance (whiteness) of the panel was measured before contamination. Multiple readings were taken and averaged. The final reflectance after washing was measured by the average of the majority readings. The cleaning efficiency is the final reflectance ratio to initial reflectance.

<Result>

Claims (13)

An aqueous hand cleaner formulation comprising 1 to 20% by weight of a mixture of paramentadiene and 1 to 10% by weight of one or more organic solvents capable of solubilizing one or more oily emulsifiers and polar contaminants. The formulation of claim 1, wherein the mixture of paramentadiene comprises α-terpinene, γ-terpinene, iso-terpinolene and camphor. The formulation of claim 2, wherein the mixture of paramentadiene further comprises at least one of limonene, terpinolene, α-phellandrene and β-phellandrene. The formulation according to any one of claims 1 to 3, wherein the mixture of paramentadiene is present in an amount of 5 to 10% by weight. The formulation according to claim 1, wherein the oily emulsifier is present in an amount of up to 15% by weight. The formulation according to claim 1, wherein the organic solvent comprises glycol ether or lactate. The formulation of claim 1, further comprising an antioxidant in an amount of up to 0.5% by weight. The formulation according to any one of claims 1 to 3, comprising mixing together 1 to 20% by weight of a mixture of paramentadiene with 1 to 10% by weight of at least one oily emulsifier and at least one organic solvent. Method of preparation. An abrasive cleaning material having at least one abrasive surface and comprising a support impregnated with an aqueous cleaning formulation comprising a mixture of paramentadiene and one or more surfactants, solubilizers, or mixtures thereof. 10. The abrasive cleaning material of claim 9, wherein the aqueous cleaning formulation is in accordance with any one of claims 1 to 3. 10. The abrasive cleaning material of claim 9, wherein the support comprises double woven large fiber / fine fiber meltblown. 12. The abrasive cleaning material of claim 11, wherein the meltblown comprises 28% by weight large fibers and 72% by weight fine fibers. The abrasive cleaning material of claim 9, wherein the weight ratio of the cleaning formulation to the support is about 3.5: 1.