KR20030076575A - Expanded perborate salt, use, and method of production - Google Patents

Abstract

Disclosed herein are effervescent compounds containing liquid components, effervescent systems, and optionally solvents. The solvent may be hydrophilic or hydrophobic, and may have a low solubility in the foamable component. This solvent may include alcohols, glycols or glycol ethers, including but not limited to 2-butoxyethanol. Non-limiting examples of effervescent systems used in effervescent compounds include effervescent perborate anhydrides, or effervescent perborate anhydrides, borate salts, or mixtures of acids and one or more of sodium bicarbonate, sodium carbonate, potassium bicarbonate and potassium carbonate. The effervescent compound may further comprise one or more or all or any combination of the following components: surfactants, bleach compositions, antisedimentation agents, binders, lubricants, colors, fragrances, corrosion inhibitors, disinfectants, pesticides, fertilizers And / or polishes. The present disclosure also discloses a process for preparing foamed perborate accompaniments. The present disclosure also discloses a process for the preparation of foamable compounds that includes providing a solvent, providing a foamable system in powder form, and mixing the solvent and the foamable system to produce a free flowing foamable system. The disclosed method includes the step of compacting the foamable compound and then preparing the granules or tablets.

Description

Foamed perborate, its use and preparation method {EXPANDED PERBORATE SALT, USE, AND METHOD OF PRODUCTION}

One major limitation in effervescent cleaning, disinfection or other products has been the amount and type of liquids and active ingredients that can be incorporated into the effervescent formulations. In general, the active ingredient was available in less than 25% by weight of the effervescent preparation in the form of tablets or effervescent granules. Typically, surfactants such as anionic, nonionic, cationic and amphiphilic surfactants can be used in up to 5% of the foamable formulation, since these components reduce the storage stability of carbonate-based foamable products and This is because granulation or tableting becomes difficult or impossible and greatly increases the dissolution time of the resulting product. If surfactants are used at 5% or more, it is usually necessary to use disintegrants to dissolve the composition.

In general, the solvent was incompatible with the effervescent product. They are very hydrophobic, incompatible with aqueous systems, or hydrophilic enough to initiate the foaming reaction, making the product unstable. Many surfactants are only useful as liquids containing water or alcohols and cannot be used at any useful level in foamable formulations. In the past, solvents were mainly used for preparing effervescent tablets for wet granulation and evaporated to produce the final tablets.

As mentioned above, generally less than 25% by weight of the tablets in typical effervescent tablets were useful as components other than effervescent systems. For example, up to 75% by weight of the tablet may be a binder, but typically only about 10% to 25% was used. Typically, effervescent systems can be considered up to 50% of tablets. It should be noted that the more foaming systems used, the faster the tablet dissolves, but less certain other ingredients are available for tablets. Glidants to assist in the manufacture of tablets comprise up to about 10% by weight of conventional tablets. Perfumes and pigments constituted approximately 2% of the tablets. Higher levels of perfume in conventional tablets have been found to adversely affect tablet stability, dissolution, hardness, and tablet manufacture.

One solution is to replace conventional carbonate-based systems with anhydrous perborate. A method of using sodium perborate anhydride in non-aqueous liquid constituent detergent compositions is disclosed in British Patent GB-A 1,205,711 ('711 patent). However, the '711 patent did not provide any further details of exactly what sodium perborate anhydride means and did not address the improved dispersibility of detergents in wash water by the addition of sodium perborate anhydride.

Anhydrous perborate has also been described as a potential effervescent system that provides oxygen gas upon contact with water. For example, US Pat. No. 4,772,412 to Green et al. ('412 patent) discloses a process for preparing anhydrous perborate that can be used in non-aqueous liquid detergents.

Foaming compounds comprising anhydrous perborate for the purpose of improving the dispersion or dissolution of the detergent composition into the wash water, or improving the delivery of the detergent active agent of the composition to the wash liquor, or improving sudsing, Developed. For example, Patent Cooperation Treaty Application No. US99 / 10008 (International Publication No. WO 99/58444) (Application 10008) and Patent Cooperation Treaty Application No. US99 / 10007 (International Publication Number WO 99/58632) ( 10007 application). However, the 10008 application provides anhydrous perborate that is intimately mixed with the diluent, which may take more time and money to prepare the final product detergent. In addition, dehydration of the mixture of anhydrous perborate and diluent, or drying of the solvent of the non-aqueous diluent, takes more time and money to prepare the final product detergent. Thus, depending on the conditions of the dehydration of the hydrated perborate or the drying process of the diluent, a certain amount of the hydrated borate may be present in the product of the 10008 application, which limits the product to a use in which the bleaching action can be tolerated.

In addition to diluents that can be mixed with anhydrous perborate, the 10007 application provides anhydrous perborate coated with a coating composition to improve stability. While this alleviates the need for the incorporation of high levels of perborate monohydrate, it adds further steps to the preparation of the detergent composition, thereby increasing the manufacturing time and cost, as well as the weight and size of the final product detergent particles. Increase.

One typical form of sodium perborate anhydride (borate) is manufactured and marketed by Degussa-Wheels AG, Frankfurt, Germany. This can be prepared by applying heat to the hydrated perborate under vacuum, as described in the European patent EU0053859, generally to immediately vent the vapor released upon application of heat. Commercial boronates form bubbles, but are difficult to use in tablets without the addition of additives (see US Pat. Nos. 4,409,118 and 4,857,224). When filled with a solvent or liquid component, the boron salt begins to aggregate when the solvent or liquid component is comprised about 60% of its weight. Boronates become pastes at high filling values of solvents or liquid components.

Therefore, since the necessity that has not been dealt with so far exists in the field of the present industry, the above-mentioned defects and injustices will be addressed.

Related Applications

This application is a priority claim of US Provisional Application No. 60 / 245,540, filed Nov. 3, 2000, "Foaming Perborate and Manufacturing Method," and US Patent Application No. 09 / 858,020, filed May 15, 2001. And some disclosures of " foamable perborate, uses, and methods of preparation ", the disclosures of each of which are incorporated herein by reference in their entirety.

Technical field

In general, the present invention relates to foamable products, and more particularly to foamable products, including perborate, and methods of making the same.

The invention can be better understood with reference to the following figures. The components in the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the invention. In addition, the same reference numerals in the drawings denotes corresponding parts throughout the several views.

1 is a comparative chart of scanning electron microscopy (SEM) images of conventional compounds and EPB.

Detailed description of the invention

The present invention can solve the above-mentioned drawbacks and injustices by providing and using expanded perborate anhydride (EPB) in the preparation of foaming compounds. Effervescent compounds of the invention may be in the form of tablets, granules or powders. In a preferred embodiment of the present invention "perborate hydrate" means perborate monohydrate.

The EPB can absorb up to 120% of its own weight by a fairly high level of liquid and remains free flowing. Surprisingly, EPB is very easy to tablet and retains its flow and tableting properties even after absorbing liquid above its own weight. In addition, the amount of foam is sufficient to eliminate the need for additional foamable materials capable of producing foamed tablets, granules or powders containing up to 60% of the liquid component as required.

EPB is produced by heating the perborate hydrate to a sufficiently high temperature for a time sufficient to cause a loss of at least 20% of its weight. Thus, EPB is produced by dehydrating perborate hydrate at a temperature and time sufficient to reduce the weight of the EPB product to less than 80% of the perborate hydrate starting material. In general, the temperature should be at least about 120 ° C., for example. In a preferred embodiment, the reaction temperature is at least about 130 ° C to at least about 175 ° C. There is no set upper limit for the dehydration temperature, but those skilled in the art will understand that the reactants decompose at very high temperatures, such as 1400 ° C.

Generally, the perborate hydrate is heated for about 2 minutes to about 5 hours. The reaction of the perborate hydrate to form the EPB is time-temperature dependent, i.e. the higher the temperature (within reasonable levels), the shorter the time required for dehydration to occur. For example, dehydration at about 150 ° C. can occur within less than 2 minutes to about 15 minutes, while at 135 ° C., dehydration can vary from about 5 minutes to about 1 hour. In a preferred embodiment of the process of dehydrating perborate hydrate to EPB, the dehydration time is 15 minutes or less, and the temperature and other reaction conditions such as the thickness of the layer of perborate, air movement, the means or method of heating the perborate (radiative heating , Convection heating, or the like) is preferably 2 to 3 minutes.

The resulting EPB of the present invention has a lower residual peroxide value, lower bulk density, higher porosity and higher surface area than commercially available sodium perborate anhydride (borate). For example, the borates have a density of approximately 0.39 g / ml, or 1 g occupy a volume of approximately 2.5 ml. However, EPB has a density of approximately 0.28 g / ml, or 1 g occupies a volume of approximately 3.5 ml.

While not wishing to be bound by any theory, it is believed that in the preparation of the EPB of the present invention, some water vapor is recondensed to the perborate particles to cause foaming when oxygen is liberated. As the particles foam upon production, voids or spaces form in the sodium perborate salt to form a "foamed" perborate anhydride or EPB. EPB appears to be more sodium borate salt than borate. For example, when viewing a commercial boron under a microscope, it looks similar to the surface of a loosely packed snowball, but when looking at the EPB of the present invention under a microscope, the surface of the "snowball" has many holes and voids, and much more. It looks irregular.

FIG. 1 shows a comparison of scanning electron microscopy (SEM) of EPB 100 with conventional borate 50 and sodium perborate 60 at 6 μm, 1.5 μm and 600 nm. As can be clearly seen at 1.5 μm and 600 nm magnification, EPB 100 is considerably more porous than borate 50 or sodium perborate monohydrate 60 and has more voids and hot poles.

EPBs generally contain residual peroxides. In a preferred embodiment of the EPB, the residual amount of peroxide (when expressed as hydrogen peroxide) is present in the composition at less than 6% by weight, preferably in the composition at about 0.5% to about 3% by weight. However, hydrogen peroxide in the borates is present at about 6% by weight of the borates. Therefore, EPB can be used in foamable compositions which do not require or preferably contain bleach. In addition, since the peroxide is assumed to be already contained in the preparation of the EPB as described above, the result is a product containing a large amount of voids, which is lower in density than a conventional foamable composition and can absorb more liquid active ingredients. . However, it is also included in the embodiments of the present invention to mix the boron salt with the EPB while varying the ratio of EPB: borate, depending on the desired use. In a preferred embodiment, the ratio of EPB: borate is greater than one.

Table 1 below summarizes the conditions under which the EPB can be prepared. EPB can be obtained by heating monohydrate sodium perborate at ambient pressure. Although the present invention mainly describes and describes anhydrous sodium perborate, those skilled in the art will recognize that anhydrous perbooxides of other alkali metals may also be used, and examples of such alkali metals include lithium (Li), potassium ( K), rubidium (Rb), and cesium (Cs). Alkaline earth metal perborates, including beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), and barium (Ba), may also be used to prepare EPBs for applications where the EPB does not need to be water soluble. Can be.

EPB manufacturing conditions Sample number Temperature time Weight loss Hydrogen peroxide Density (g / ml) One 135 ° 0.25 hr 16% 2.7% 2 0.5 hr 20.5% 1.7% 3 1 hr 21.5% 0.9% 4 2 hr 26.3% 0.8% 5 5 hr 26.9% 0.5% 0.28 6 170 ° 0.25 hr 26.9% 2.7% 7 0.5 hr 26.9% 2.3% 8 1 hr 26.9% 1.5% 9 2 hr 27% 0.8% 10 5 hr 27% 0.8% 0.27

The properties of the tablets prepared from these samples were compared with commercially available sodium borate. The samples contained 0 wt%, 50 wt%, and 100 wt% 2-butoxyethanol. Thereafter, the liquid-containing sample was mixed with 2% sodium benzoate as a lubricant and then 2 g of tablets were compressed to 0.6 tons using a 19.5 mm punch and die. Tables 2 and 3 show the results of comparing tablets made of anhydrous foamed sodium perborate of the present invention with tablets made of conventional boron acid salts.

Comparison of Hardness of ESPB and Borate at Various Content Concentrations sample content Tablet Hardness (Relative Coefficient) Borate 0% 7 50% 3 100% Liquid EPB-Sample 2 0% > 40 50% 18 100% 5 EPB-Sample 3 0% > 40 50% 20 100% 5 EPB-Sample 4 0% > 40 50% 20 100% 6 EPB-Sample 7 0% > 40 50% 21 100% 8 EPB-Sample 8 0% > 40 50% 23 100% 9 EPB-Sample 9 0% > 40 50% 21 100% 10

Sodium perborate which is a common monohydrate; Boron salts; Comparison of properties and ESPB Common Sodium Perborate, Monohydrate Borate ESPB Scanning electron microscope (see Figure 1) Crystalline, nonporous Amorphous, porous Amorphous, with many open voids Bulk density 0.55-0.66kg / l 0.3% -0.4kg / l 0.24-0.28kg / l Hydrogen peroxide 32-36% 4-6% 0.5-3% Liquid content (2-butoxyethanol (g) / carrier (g)) 0.3: 1 0.7: 1 1.2: 1 Tablet hardness Carrier-free 15 7 25 0.3: 1 with carrier 2 4 12 0.7: 1 with carrier na 2 8 1.0: 1 with carrier na na 4 1.2: 1 with carrier na na 2 Oxygen (O ₂ ) gas made from water na 13% 3-5% pH (1% solution) (approximate range) 10.2-10.5 10-10.4 10.6-10.8

It is clear from the data that the EPB of the present invention exhibits significantly improved loading levels and purification properties compared to conventional boronates. If all liquid components present in the tablets are retained using effervescent sodium borate EPB as carrier, the high concentration of liquid surfactant may be contained in the effervescent product. Solvents such as volatiles (eg alcohols or ethers); And nonvolatile (eg, glycerin or propylene glycol) solvents may be contained in the foam compositions at high concentrations. Oils and fragrances may also be used in high concentrations in the foamable composition. In the foamable composition of the present invention, a solvent can be used to dissolve various active ingredients such as surfactants or quaternary ammonium salts, and then contain it in a carrier, ie EPB, for use in foamable tablets. It should be noted that this dissolution increases the dissolution rate of the hydrophobic component. Using a content ratio of liquid: EPB of 1.2: 1 or less yields a free flowing powder that can be used as effervescent tablets or granules.

In addition, the pH of the composition prepared with the EPB of the present invention may be present alkaline as the alkalinity is demonstrated by the EPB in Table 3 above. Thus, in certain compositions, the pH of the composition can be made greater than about 9 using EPB as the alkalinity enhancer. This can enhance the detergency of the composition comprising EPB as the active ingredient.

Dissolving many active ingredients that can increase the amount of active ingredient added to the expandable compound using the solvent used in the present invention results in improved dissolution rates in the expandable compound when added to other types of solvents or aqueous solvents. In various embodiments of the present invention, many other solvents may be used, including hydrophobic and hydrophilic solvents. In a preferred embodiment, the solvent is sufficiently hydrophobic to be usable in the water soluble product but does not initiate the foaming reaction of the foamable compound with the foamable components, which means that the solubility in the foamable component is low. Preferably, the solvent itself can also be used as the active ingredient in the foamable compound. In an embodiment of the invention, the solvent comprises a glycol ether. In a preferred embodiment, the solvent includes, but is not limited to, 2-butoxyethanol. Solvents of the type usable in the present invention also provide additional cleaning performance as they do not deleteriously affect the physical or chemical stability of the effervescent compound.

Effervescent compounds, including the solvents described above, can be molded into tablets. As used herein, "tablet" means both tablet and granular form of effervescent product, and "granule" generally refers to a compact mixture of uniform size. Tablets made using the EPB of the present invention have storage stability and good physical properties. For example, but not limited to their physical properties, tablets are hard, hard to break, and both weight and size are minimal, making them suitable for certain applications and improved over tablets not made with the EPB of the present invention. Has a dissolution rate.

Foaming systems of the present invention include, but are not limited to, EPB, or EPB + borate, or a mixture of an acid with at least one sodium bicarbonate, sodium carbonate, potassium carbonate and potassium bicarbonate + EPB, or an acid with at least one sodium bicarbonate, sodium carbonate, carbonate Mixtures of potassium and potassium bicarbonate + boronates + EPB. Generally, the foamable system is in powder form. When EPB is used alone in the foamable system, the solvent or liquid component may be present in the foamable compound of the present invention in an amount up to about 55% by weight of the composition. However, when the effervescent main component is a carbonate / acid system, the amount of solvent or liquid component may be limited to about 35% by weight of the effervescent compound. If the solvent is used alone in the effervescent system and no other ingredients are added, the solvent itself can serve as a cleaning component, including, but not limited to, a "degreasing agent" which is a compound that makes the oil miscible with water.

Many other components can also be added to the solvent to include in the foamed compound. Non-limiting examples of these additional components that can be added to the solvent and then loaded into the EPBs of the present invention include any one, all or any combination of the following materials: surfactants, bleach compositions, optical bleach Reattachment, chelating agents, sequestering agents, binders, lubricants, colorants, pesticides, preservatives and / or fragrances. Depending on the use of the foaming compounds of the invention, the components can be used in any combination and percentage ratio. When using EPB alone as the foaming system, the blending components can be present in amounts up to 50% by weight of the foaming compound. However, when using a carbonate / acid foaming system as the main foaming component, the components may be limited to up to about 35% by weight of the foaming compound.

Non-limiting examples of exemplary surfactants that may be added to the foamed compound include: synthetic anionic surfactants, which are generally water soluble alkali metal salts of organic sulfates and sulfonates; Nonionic surfactants which are generally reaction products of primary alcohols, secondary alcohols or alkyl phenols with alkylene oxides, or are amine oxides, phosphine oxides or dialkyl sulfoxides; Amphoteric surfactants; Or zwitterionic surfactants and / or soaps. Non-limiting examples of bleaching compositions that can be used include chlorinated isocyanurate, perborate hydrate, persulfate or percarbonate, and the like. Non-limiting examples of anti-reposition agents include acrylates and cellulose derivatives. Non-limiting examples of binders used in the blowing agents of the present invention include any, all or any combination of the following materials: starch and starch derivatives, cellulose and cellulose derivatives, carbohydrate gums, sugars, resins, proteins and inorganic salts . Non-limiting examples of lubricants that can be used in the foamed compounds of the present invention include any one, all or any combination of the following: sodium benzoate, sodium stearate, magnesium stearate, aluminum stearate, stearic acid, Mineral oil and polyethylene glycol.

Non-limiting examples of foamed products that can be made using EPB include carpet cleaners, dishwashing detergents, glass cleaners, laundry detergents, sanitizers and / or hard surface cleaners / disinfectants. Other foamed products which can be prepared with the carrier of the present invention are not limited to detergents, but also absorbers, dry lubricants, anhydrous solvents, fertilizers, fragrance dispensers, fungicides, insecticides, herbicides, packaging materials, rust inhibitors, fabric softeners, wrinkle relief Wrinkle releaser agents, furniture polishes, preservatives, deodorants, automotive detergents, automotive waxes and various shampoos, soaps, bath salts, bath foams and foam baths and the like.

Those skilled in the art can contemplate application for various types of such foamed products. EPB does not have to use only its foaming properties. For example, EPB is not limited to the blowing agent manufacturing use, but can also be used in industrial and public settings, where the solvent can be recovered by using the solvent as EPB and then absorbing the solvent with EPB. . In addition, the use of foamed products made of EPB allows the hazardous substances spills to be contained and absorbed in dry form and potentially recovered. It is also possible to use EPB in foam products which can be cleaned by absorbing kitchen fats or oils and making them into dry powders. In order to be able to use the product as a lubricant in dry form, which is released upon exposure to moisture, EPB can be used in the foamed product. EPBs can also be used in dry solvent products. Non-limiting examples of such dry solvent products include dry single dose charcoal lighters and the like.

Similarly, EPBs can be incorporated into products that can be used for home and garden or agricultural settings. For example, EPB can be used as a dry preweighing dose for fertilizer products such as garden sprays or manual sprays. It is also possible to use EPBs in dry applications as fungicides such as crop spreaders or as dry preweighing doses for garden sprays or manual sprays. Similarly, EPB can be used as a dry application for insecticides such as crop spreaders, or dry preweighing doses for garden sprays or manual sprays. EPB can also be used for dry insecticides as cockroach insecticides and ant insecticides, or as flea and tick shampoos for domestic or agricultural livestock. Similarly, EPB can be used as a herbicide in dry applications such as pre-dose doses of garden sprays or manual sprays, or crop spreaders.

EPBs can also be used as packaging for volatile liquids or dangerous substances. EPBs may also be used in rust inhibitors, such as dental and instrumental devices, such as, but not limited to, morpholine, imidazoline or benzotriazole. EPB can also be used for use as a hygienic agent. For example, it can be used as a hygiene in the dental industry, where the product can maintain phenol or quaternary ammonium salts in dry form with alcohol, but is not limited thereto. This may provide an alternative hospital grade disinfectant or hygiene in tablet form.

Listed herein are exemplary compositions of some sample cleaners that can be prepared using EPB. Foamed carpet cleaners that can be prepared using EPB can include up to 18% by weight of the solvent composition, which was not previously achieved in foamed cleaners. In addition, carpet cleaners using EPB may contain up to about 15% by weight of surfactant (s) of the composition, which is three times the conventional surfactant concentrations that have been used in foaming detergents up to now. Perfume may comprise up to about 3% by weight of the composition. In addition, the carpet cleaner may comprise up to about 36% by weight of the liquid component of the foamed detergent, which is 5 to 10 times the liquid concentration possible amount that could have been included in conventional foamed detergents. In addition, carpet detergent tablets made from the EPBs of the present invention have a dissolution time of less than 5 minutes at 40 ° C. when dissolved for use as a cleaning aid.

Another example of a cleaner that can be made using EPB is a glass cleaner. The glass cleaner of the present invention may be prepared, for example, in the form of a tablet, but is not limited thereto. Glass cleaners may include up to 30% by weight of the solvent of the composition, which was not achieved in conventional foamed products. In addition, the glass cleaner may contain up to about 5% by weight of the surfactant (s) and up to about 35% by weight of the liquid component. In addition, the glass cleaner has a dissolution time of less than about 5 minutes at 40 ° C. when dissolved for use as a cleaning aid.

Another example of a possible detergent that can be made using EPB is a laundry detergent. Laundry detergents of the present invention may comprise up to about 24% by weight of the liquid surfactant in the composition, which is an amount previously unachievable in foamed detergents. In addition, the laundry detergent may contain up to about 5% by weight fragrance, which is two to five times the amount used in conventional foam formulations. The laundry detergent has a dissolution time of less than about 5 minutes at 20 ° C. when dissolved for use as a cleaning aid.

Another example of a possible cleaner that can be prepared using EPB is a hard surface cleaner / disinfectant. The hard surface cleaners of the present invention may include up to about 24% by weight of the solvent of the composition, which is an amount that could not be achieved in conventional hard surface cleaners. Hard surface cleaners may include up to about 15% by weight of quaternary ammonium salts, five times the amount that has been used in conventional foam product purification. This loading amount is important to make the tablets more effective or to produce smaller, effective tablets. The hard surface cleaner may comprise surfactant in an amount up to about 5% by weight of the composition, and the total active ingredient may comprise in an amount of about 39% by weight of the composition. The hard surface cleaner also has a dissolution time of less than about 5 minutes at 40 ° C. when dissolved for use as a cleaning aid.

Also included in the scope of the present invention are methods for producing foamed compounds. The method includes providing a solvent, providing a foaming system in powder form comprising EPB, and preparing a free-flowing foaming compound by mixing the foaming system with the solvent. . The method may also include compacting the compound, and forming the foamed compound into granules or tablets. The solvent used in the step of providing the solvent may be hydrophobic or hydrophilic. However, in a preferred embodiment, the solvent is hydrophilic and has low solubility with the foaming component. For the purposes herein, "low solubility" means that the solvent has little solubility with the foaming component. This prevents the reaction and foaming of the product before use. Non-limiting examples of such solvents may be any or any combination of glycols, alcohols and glycol ethers such as 2-butoxyethanol.

Non-limiting examples of foaming systems for use in the step of providing the foaming system in powder form include EPB or EPB + borate, or a mixture of EPB + acid with one or more of sodium bicarbonate, sodium carbonate, potassium carbonate and potassium bicarbonate, or EPB And a mixture of one or more of + borate + acid with sodium bicarbonate, sodium carbonate, potassium carbonate and potassium bicarbonate. The method may further comprise preparing the foaming compound by providing the foaming system and other components in powder form to be mixed with the solvent. Non-limiting examples of such ingredients include any one, all or any combination of any of the following materials: surfactants, bleach compositions, optical bleaches, anti-stick agents, binders, lubricants, colorants, corrosion inhibitors, Disinfectants, pesticides, fertilizers and / or fragrances. If desired, these components may be mixed with or dissolved in a solvent or solvent mixture and, if necessary, distilled to remove any low boiling alcohol or water before loading into the EPB. The resulting liquid can then be used for the foamed compound. It should be noted that the resulting foamed compound comprising EPB is stable and has good tableting and dissolution properties.

It should be emphasized that the foregoing embodiments of the present invention, in particular any "preferred" embodiments, are presented merely as examples of possible embodiments and are only mentioned for a clear understanding of the principles of the present invention. Various modifications and changes may be made to the embodiment (s) of the invention described above without departing substantially from the spirit and principles of the invention. All such modifications and variations are intended to be included herein within the scope of this disclosure and the present invention and protected by the following claims.

Summary of the Invention

The present invention provides a foamable system and a carrier for a liquid component to be used in the foamable composition and a method for producing a carrier for a liquid component to be used in the foamable compound. In brief, carriers are effervescent perborate anhydrides (EPBs), which are carriers and effervescent materials that can be filled up to 1.2 times their weight with a solvent or liquid component in which many different materials can be dissolved. EPB is a free flowing dry powder suitable for incorporation into effervescent tablets, granules or powders.

It can also be seen that the present invention provides a method for producing EPB. The process of the present invention comprises heating the perborate monohydrate at a temperature and for a time to prepare the expandable perborate anhydride.

In addition, the present invention can be considered to provide an effervescent compound comprising an EPB and a method for producing the effervescent compound. In this regard, the process of the present invention comprises providing a solvent or liquid component; Providing a foamable system comprising EPB in powder form; It can be outlined by the step of producing a free flowing foamable compound by mixing the solvent or liquid component with the foamable system. Alternative embodiments of the invention further comprise dissolving the component (s) in a solvent or liquid component and generating a free flowing foamable compound by mixing the resulting solution with a foamable system. In addition, the process of the present invention may comprise compacting the expandable compound and forming granules of the expanded compound. In alternative embodiments, the methods of the present invention may comprise compressing the expandable compound and forming a tablet from the expandable compound.

Other methods, aspects, and advantages of the present invention will become apparent to those skilled in the art upon reviewing the following detailed description and drawings. All such additional methods, aspects, and advantages are intended to be included in this description, be within the scope of the invention, and be protected by the appended claims.

Claims (46)

A composition used for the preparation of a foamable compound comprising a foamed perborate anhydride, wherein the foamed perborate anhydride is prepared by dehydrating perborate monohydrate at a temperature of 120 ° C. or higher. The composition of claim 1 wherein the foamed perborate anhydride adsorbs a high proportion of the liquid active ingredient. The composition of claim 1, wherein the foamed perborate anhydride adsorbs the liquid active ingredient that constitutes at least about 50% by weight of the composition. The composition of claim 1 wherein the foamed perborate anhydride is foamed alkali metal perborate anhydride. 5. The composition of claim 4 wherein the foamed alkali metal perborate anhydride is foamed sodium perborate anhydride. The composition of claim 1 wherein the foamed perborate anhydride contains a residual amount of peroxide. The composition of claim 6, wherein the residual amount of peroxide is from about 0.5% to about 3% when expressed as hydrogen peroxide. The composition of claim 1, further comprising oxoborate. The composition of claim 1, which may contain a solvent or liquid component such that the ratio of solvent or liquid component to composition is 1.2: 1. The composition of claim 1 exhibiting sufficient alkalinity to enhance detergency. A method of washing by contacting a surface to be washed with a solution obtained by dissolving the foamable composition of claim 1 in water. A method of adsorbing a material by contacting the foamable composition of claim 1 with the material. The method of claim 12, wherein the adsorbed material is a dangerous substance. A method of modifying a plant by contacting a plant with a solution obtained by dissolving the foamable composition of claim 1 in water. A method of destroying a plant by contacting the plant with a solution obtained by dissolving the foamable composition of claim 1 in water. A method for destroying insects or arachnids by contacting insects or arachnids with a solution obtained by dissolving the foamable composition of claim 1 in water. A method for preventing corrosion by contacting a solution obtained by dissolving the foamable composition of claim 1 in water and a corrosive metal. A method of disinfecting or disinfecting a solution obtained by dissolving the foamable composition of claim 1 in contact with a surface to be sterilized or disinfected. A method of deodorizing by contacting a solution obtained by dissolving the foamable composition of claim 1 in water and a surface to be deodorized. Providing a perborate monohydrate, and Dehydrating the perborate monohydrate at atmospheric pressure and at a temperature of at least 120 ° C. Foamed perborate anhydride compound prepared by the method comprising a. 21. The product of claim 20, wherein the dehydrating step of perborate monohydrate comprises heating the perborate monohydrate. The product of claim 21, wherein heating the perborate monohydrate comprises placing the perborate monohydrate in an oven. The product of claim 22, wherein placing the perborate monohydrate in the oven comprises placing the perborate monohydrate in a drying oven. 21. The product of claim 20, wherein heating the perborate monohydrate comprises heating the perborate monohydrate at a temperature of about 130 ° C to about 175 ° C. The product of claim 20, wherein heating the perborate monohydrate comprises heating the perborate monohydrate for about 15 minutes to about 5 hours. The product of claim 20, wherein heating the perborate monohydrate comprises heating the perborate monohydrate for less than 15 minutes. 21. The product of claim 20, wherein the foamed perborate anhydride is foamed sodium perborate anhydride. 28. The product of claim 27, further comprising a borate salt. 21. The method of claim 20, wherein dehydrating the perborate monohydrate comprises dehydrating the perborate monohydrate for a temperature and time sufficient to reduce the weight of the foamed perborate anhydride compound to less than 80% of the perborate monohydrate. Product to include. Providing a low solubility solvent in an amount of up to about 55% by weight of the compound relative to the effervescent component, Providing a foamable system in powder form containing foamed perborate anhydride, wherein the foamed perborate anhydride is prepared by dehydrating perborate monohydrate at a temperature of at least 120 ° C., and Mixing the effervescent system with a solvent to produce a free flowing effervescent compound Including a method for producing a foamable compound. 32. The method of claim 30, further comprising the steps of: compressing the expandable compound, and Preparing granules of effervescent compound It further comprises a. 32. The method of claim 30, further comprising the steps of: compressing the expandable compound, and Preparing a tablet form from the effervescent compound It further comprises a. 31. The method of claim 30, wherein providing a foamable system containing foamed perborate anhydride comprises providing the foamable system in powder form further containing an acid and at least one of sodium bicarbonate, sodium carbonate, potassium bicarbonate and potassium carbonate. Which method. 31. The method of claim 30, wherein the foamable system containing foamed perborate anhydride comprises providing the foamable system in powder form further containing borate. 31. The method of claim 30, wherein providing a foamable system containing foamed perborate anhydride provides the foamable system in powder form further comprising at least one of sodium bicarbonate, sodium carbonate, potassium bicarbonate and potassium carbonate, acid and boronate. The method comprising the step of. 31. The method of claim 30, wherein providing a foamable system containing foamed perborate anhydride comprises providing a foamable system containing foamed alkali metal perborate anhydride. 37. The method of claim 36, wherein providing a foamable system containing foamed alkali metal perborate anhydride contains foamed sodium perborate anhydride. 31. The method of claim 30, wherein providing a foamable system containing foamed perborate anhydride provides a foamed system containing foamed perborate anhydride that adsorbs a liquid active ingredient that constitutes about 50% by weight of the composition. Method comprising a. 31. The method of claim 30, wherein providing a foamable system containing foamed perborate anhydride comprises providing a foamable system containing a mixture of foamed perborate anhydride and boron acid salt. The method of claim 30 wherein the foamable compound prepared is selected from adsorbents, anhydrous lubricants, anhydrous solvents, fertilizers, fragrance dispensers, fungicides, pesticides, herbicides, packing materials, rust inhibitors and disinfectants. Solvents that are low in solubility in the effervescent component and constitute up to about 55% by weight of the compound, and A foamable system comprising a foamed perborate anhydride, wherein the foamed perborate anhydride is prepared by dehydrating the perborate monohydrate at a temperature of 120 ° C. or higher. Effervescent compound comprising a. 42. The compound of claim 41, wherein the foamed perborate anhydride adsorbs a high proportion of the liquid active ingredient. 42. The compound of claim 41, wherein the foamed perborate anhydride adsorbs the liquid active ingredient that comprises about 50% by weight of the composition. 42. The compound of claim 41, wherein the foamed perborate anhydride is foamed alkali metal perborate anhydride. 45. The compound of claim 44, wherein the foamed alkaline earth metal perborate anhydride is sodium perborate anhydride. 42. The compound of claim 41, wherein the foamed perborate anhydride contains a residual amount of peroxide.