Particles for whitening, bleaching and washing compositions

 

(57) Abstract:

Usage: obtain environmentally friendly detergents with bleaching effect. Described particles for whitening contain peroxy acids or compounds that produce hydrogen peroxide, and 0.01 to about 15 weight. % amino acid selected from alanine-N,N-luxusni acid, Soeren-N,N-luxusni acid or amino acids of the formula (noos-CH2)2N-Cn(R)HmCOOH, in which R represents a CH2HE or CH3, n is 1 and m is 2, or a salt thereof. Also described bleaching and washing compositions containing these particles. The technical result is to strengthen the whitening effect and harmless for the environment. 3 S. and 12 C.p. f-crystals, 3 tables.

The present invention relates to particles comprising a peroxy compound and an amino acid. The invention also relates to the use of particles and compositions containing such particles.

Powder detergent compositions often contain peroxide as a bleaching products that produce hydrogen peroxide or peroxy acids in aqueous solutions. However, many peroxide is unstable during storage. Believe that their decomposition of cataline, this contributes to alkaline pH (typically from about 8 to about 12) and other components typically included in detergents, for example, zeolites or bleach activators such as TAED (tetraacetylethylenediamine), TAGU (tetraaceticacid) or PAG (pentaacetate).

To obtain environmentally friendly detergents, as a bleaching means, it is desirable to apply bergerat carbonate of an alkali metal, commonly known as percarbonate. However, the activity of percarbonate in detergent quickly decreases due to decomposition during storage of the detergent at normal room temperature and humidity.

There have been many attempts to stabilize percarbonate, for example, by mixing with stabilizing substances or coating them, such as sulfates, carbonates, borates, silicates or organic matter. Such methods of stabilization are described in the patent literature, for example, in patents in the UK 1466799, 1538893, 1575792, European patents 459625, 573731 and U.S. patent 3975280.

U.S. patent 5 362 412 discloses the introduction of some bioresidues amino acids in the detergent composition to improve the bleaching. However, in the patent says nothing about improving seeking an introduction to percarbonate amino acids, with less than two carboxyl groups, and polyphosphonates acid.

In the European patent 407045 disclosed composition percarbonate sodium containing compound selected from certain amino acids.

The aim of the present invention to provide a particle containing a peroxide compound, in particular, percarbonate alkali metal, with increased storage stability, especially in detergent compositions. Another aim of the invention are particles containing a peroxide compound, the components of which are harmless to the environment.

This invention solves these problems by obtaining particles, comprising the peroxide compound, are known to produce hydrogen peroxide or peroxy acids in aqueous solutions, furthermore, the particles further include amino acid of the formula:

(HOOC-CH2)2N-CnHmCOOH-R,

in which R represents H, CH2OH or CH3, n is 1, 2 or 3, and m is 0 to 2n; or their salts.

Preferably n is 1 or 2 and more preferably m is equal to n. In one preferred embodiment, R is H, n is 2, m is equal to 4.

In another preferred embodiment, R represents a CH2OH or CH

The particles contain up to 15 wt.%, preferably up to about 10 weight. %, more preferably up to about 5 wt.% amino acid(s) listed above, or their salts. Preferably, if the particles include more than 0.01 wt.%, more preferably more than 0.05 wt.% the above-mentioned amino acid(s) or their salts. The amino acid may be mixed with a peroxide compound and/or put into the floor.

Consider that the amino acid acts as a chelating agent, but it was unexpectedly found that the amino acids in accordance with the present invention give greater stability during storage compared to traditional biopreparedness chelating agents such as EDTA. However, too high concentration of amino acids or their salts may reduce the stability, especially at high concentrations of peroxide compounds.

It is desirable to apply the salt of the amino acid alkaline metal or alkaline earth metal. Alkali metals are preferably selected from sodium, potassium or mixtures thereof, and alkaline earth metals, preferably selected from calcium, magnesium or mixtures thereof. Sodium is most preferred. In posledice contained silicate, which further enhances stability and, in addition, improves the mechanical strength. The silicate can be mixed with a peroxide compound and/or included in the coverage. At least part of the silicate preferably be mixed with the peroxide compound. The silicate is preferably selected from a silicate of an alkali metal, preferably sodium, potassium or mixtures thereof, most preferably sodium. The molar ratio of SiO2:M2O, where M represents an alkali metal, preferably is from about 1 to about 3, more preferably from about 1 to about 2.5. Particles typically contain from about 0.1 to about 20 wt.%, preferably from about 0.2 to about 15 wt.%, more preferably from about 0.5 to about 10 wt.% silicate in the form of sodium silicate.

It was found that the stability can be further enhanced if the particles contain water-soluble magnesium compound, preferably magnesium sulfate. The magnesium compound can be mixed with a peroxide compound and/or included in the coverage. Preferably at least part of the magnesium is mixed with a peroxide compound, preferably in combination with the alkali metal silicate. Preferably, the particles contain from about 0.01 to about 5 vesago of the invention have a high stability even without a cover, but higher stability is achieved as a rule, if the particles are covered. Such a coating may, for example, contain one or more amino acids described herein, the alkali metal silicate, water-soluble compounds of magnesium, such as magnesium sulfate, salts of carbonate, bicarbonate or sulfate of an alkali metal, or an environmentally acceptable organic chelating agents, and the various components put in one or several layers.

Acceptable average particle diameter is from about 50 to about 3000 microns, preferably from about 100 to about 1600 microns. The preferred density is from about 600 to about 1500 g/l, preferably from about 800 to about 1100 g/l Was found that high density, as well as a large average particle size, improves the storage stability.

The invention has the special advantage if the peroxide compound is percarbonate alkaline metal, but you can also stabilize other peroxide compounds, for example salts perborates, peroxosulfates, peroxyborate or proxyselector alkali metals, peroxycarbonates acid or compounds that produce peroxocarbonate acid, such as diallylamine ways. Ingredients for mixing with peroxide compound is preferably added at the stage of granulation, but can also be entered directly when, for example, percarbonate alkali metal derived from the carbonate of an alkali metal and hydrogen peroxide. If you want to enter a silicate of an alkali metal, it is preferably added as an aqueous solution, and the amino acid or its salt is preferably then add before adding peroxide to the compound. The granulation can be performed by conventional methods well known in the art, such as compaction, extrusion, agglomeration in the drum or disk granulation in the fluidized bed, the solidification of the molten salt by spraying or in various types of agitators. Optional stage of the coating can be carried out by spraying the particles with aqueous solutions of components that must be done, for example, in the drum or fluidized bed.

Further, the invention relates to the application of the described particles, comprising the peroxide compound and the amino acid as a bleaching agent, preferably in connection with the washing of textiles or dishes. Particles of the present invention can be edocfile number of particles, put into water for washing, should be such as to obtain from about 0.001 to about 1 g of active oxygen per liter, which corresponds to from about 0.01 to about 6 g percarbonate sodium.

Finally, the invention relates to compositions containing an inert filler and/or one or more substances that are active in the wash, which additionally comprises particles containing a peroxide compound and the amino acid of the present invention, for example, in amounts of from about 1 up to about 100 wt.%. The composition may include a mixture of particles containing different types of peroxide compounds. Active washing substances may include washing-linking agents, surfactants, substances forming alkali, bleach activators, enzymes, or any other substance, usually used in detergents. Washing-linking agents are chosen, for example, phosphates such as tripolyphosphate, pyrophosphates or orthophosphate, alkali metal or ammonium zeolites, such as Zeolite A (i.e., Zeolite 4A, Zeolite B, Zeolite P, Zeolite X or Zeolite HS, Zeolite MAP, silicates, such as crystalline layered disilicate (for example, with the formula NaMSix+1+yH2O, in which M represents sodium or hydrogen, x represents Chistov, the citrates, carbonates, bicarbonates, sesquicarbonate, sulfates, borates or mixtures thereof. The surfactant preferably selected from anionic surfactants, nonionic surfactants, Soaps or mixtures thereof. Anionic surfactants, for example, be chosen from linear alkylbenzenesulfonates, secondary alkane-sulfonates, alpha - sulfonated methyl esters of fatty acids, alkyl sulphates, ethoxysulfuron, alcohols alpha reincorporated, sarcosinates alkali metal or sulfonates Olkiluoto ether. Non-ionic surfactants, for example, chosen from alkoxysilane compounds, such as fatty alcohols, ALKYLPHENOLS and bonds alkylamines, or alilovic of polyglucosides or amides of fatty polictically. Soap selected from sodium or potassium salts of solid fat. You can also use cationic surfactants such as Quaternary ammonium compounds, salts of imidazoline, and amphoteric surfactants. Substances forming alkali choose, for example, carbonates, silicates, phosphates, or mixtures thereof. The bleach activators are selected from N - or O-acylated compounds, such as TAED, TAGU, NBSN (neoliberalist sodium), PAG (pentaacetate) or vasiliovna debarking carboxylic acid (see WO 91/17143). The filler may include any inert substance, t which can be added to the washing process. The enzymes are selected from amylases, neutral and alkaline proteases, lipases, esterases or cellulases.

Full detergent for washing textiles contains from about 1 to about 40 wt.%, preferably from about 10 to about 30 wt.% particles of the present invention. In addition, the detergent contains detergent binding agents, for example, from about 5 to about 50 wt.%, Surfactants, for example, from about 5 to about 35 wt.%, and the substance forming the alkali, for example, from 5 to about 20 wt.%. Preferably, the detergent contains from about 5 to about 20 weight. % anionic surfactant, from about 2 to about 15 wt.% nonionic surfactant and from about 0.1 to about 5 weight. % Soaps. In addition, the detergent may contain a bleaching activators, for example, from about 1 to about 10 wt.%, enzymes from about 0.5 to about 2.5 wt.%, and fillers such as sodium sulfate, from about 5 to about 50 weight. %. It is also possible inclusion of chelating agents, such as phosphonates, etc, NTC (nitrilotriacetic acid), derivatives iminodiacetic acid or EDAC (Ethylenediamine-N,N-diantara acid), for example, in amounts of from about 0.1 to about 1 wt.%. In addition, the detergent may contain conventional components such as liquid glass, carboxymethylcellulose, dispersing agents,rashiwala agents, optical brighteners and water (usually from 3 to about 15 weight. %). Detergent can be obtained by conventional methods such as dry mixing, agglomeration or spray drying. If the receipt includes spray drying, all the components that are heat sensitive, such as particles containing peroxide compounds, enzymes and perfumes should be added to the dried material.

Separate bleaching powder may include up to 100 wt.% particles containing peroxide compounds of the present invention, but preferably from 5 to 90 wt.%.

Bleaching powder can contain only one peroxide compound or a mixture of particles containing different types of peroxide compounds. Preferably, if a substance that produces hydrogen peroxide, such as percarbonate used in an amount of from about 10 to about 75 wt.% combined with a bleaching activator, such as TAED or TAG in an amount of from 2 to about 25 wt.%. Can also be used and other bleaching activators, such as Vallirana diperkosa acid, for example, in amounts of from about 2 to about 25 wt.%. Bleaching powder may also contain detergents binding agents, for example, from 5 to 90 in which, the t of about 5 to about 90 wt.%. Preferably the bleaching powder consists mainly of from about 30 to about 75 wt.% particles containing percarbonate, of from about 10 to about 25 wt.% activator bleaching, the remainder (up to balance) includes mainly washing-linking agents, fillers, surfactants, water, or mixtures thereof.

Detergent for washing dishes can be as low alkaline detergent (pH of washing water should be around 10-11), with a content of from about 2 to about 15 wt.% a bleaching agent comprising particles of the present invention, from about 5 to about 50 wt.% disilicate alkali metal, from 0 to about 40 wt.% carbonate of an alkali metal, from about 15 to about 50 wt.% washing-linking agents, such as sodium citrate and polycarboxylate or sodium tripolyphosphate (tpfn), from about 0.5 to about 5 wt.% nonionic surfactants with low foaming, from about 0.5 to about 5 wt.% enzyme and from about 1 to about 6 wt.% the bleaching activators, such as TAED. Means for washing can also be strongly alkaline (pH of washing water around 11-12) with the same composition, and low alkaline detergent, and disilicate replace from about 20 to about 80 wt.% metasilicate alkali metal, and washing swale whitening agents, containing peroxide compounds, in particular, percarbonate that can be used in detergents, including zeolites, such as zeolite 4A. The invention also allows you to reduce or eliminate the use of, for example, add or phosphonates, which are less suitable from an environmental point of view.

Further, the invention is illustrated by examples, which, however, do not limit its scope. All content in percent refers to weight percent, unless otherwise indicated.

Example 1. Particles percarbonate sodium with a diameter of about 315-1250 μm and density of about 900 g/l was obtained by granulating fine particles percarbonate in the rotary drum of Ariha together with various additives, which serves in an aqueous solution, and drying the granules in the fluidized bed. To investigate the stability of percarbonate during storage, the obtained particles, and particles for comparison pure percarbonate sodium included in the standard detergent IEC-Z (Henkel), consisting of 9.7 percent linear alkyl-benzosulfimide (Caverage11,5), 5.2% of ethoxylated C12-18alcohol (EO7), 3.6% of sodium soap, 32.5% of zeolite 4A, 11.8% of sodium carbonate, 5.2% of the sodium salt of copolymerizate acrylic and maleic acids (So of Brightener (stilbene type), 7.4% of sodium sulfate, 12,2% water, 6.5% of foaming inhibitor (SIK), 0.5% enzyme prills-protease (activity 300.00). Samples were obtained from 64 grams IEC-Z, 12 g of particles percarbonate and 4 g of TAED. Quick stability index (BIS) was determined for each sample by measuring the amount of oxygen formed during the 24-hour storage at 40oC and dividing the released amount of oxygen on the relative content (%) active oxygen in the source percarbonate. Thus, low BIS value means high stability. The results are shown in table. 1, in which the contents of the different components is specified in weight percent of the weight of the whole particle. Abbreviations: CRC - percarbonate sodium; -AAC-alanine-N,N-dioxyna acid; LTO - disilicate sodium; AK - active oxygen; BIS - fast stability index.

Example 2. Particles percarbonate sodium with a diameter of about 315-1250 μm and density of about 900 g/l was obtained by granulating fine particles percarbonate together with the sodium salt-alanine - N,N-luxusni acid, disilicate sodium and magnesium sulfate, which serves as aqueous solutions. Granulation is carried out by extrusion of a mixture of ingredients, crushing the obtained extrudate, arrogence prepared without-alanine-N, N-luxusni acid and one sample with add instead-alanine-N,N-luxusni acid. Stability was tested in a detergent IEC-Z, as in Example 1, and the results are shown in table. 2.

Example 3. Particles percarbonate sodium with a diameter of about 315-1250 μm was coated in a rotating drum by spraying aqueous solutions of different additives. Stability was tested in a detergent IEC-Z, as in Example 1. The results are shown in table. 3. ISAAC means Soeren-N,N-deacetyltaxol acid.

Example 4. Particles percarbonate sodium with a diameter of about 315-1250 μm and density of about 900 g/l was obtained by granulating fine particles percarbonate with 1% glucoheptonate sodium, 1% disilicate sodium and 0.12% of magnesium sulfate, which serves as aqueous solutions. Granulation is carried out by extrusion of a mixture of ingredients, crushing the obtained extrudate, rounded particles on a rotating disk, drying and sieving of the rounded particles. The obtained particles were coated by spraying in a fluidized bed aqueous 2% sodium silicate (SiO2:Na2O ratio of 1), 1.4% of magnesium sulfate, 10% sodium bicarbonate and 0.5% -alanine-N,N-luxusni acid. Coated particles contained 12.7% of active oxygen. Stabiity bleach containing a peroxide compound, are known to produce hydrogen peroxide or peroxy acids in aqueous solutions, characterized in that the particles contain from about 0.01 to about 15 wt.% amino acids selected from alanine-N,N-luxusni acid, Soeren-N,N-luxusni acid or amino acid formula

< / BR>
in which R represents a CH2OH or CH3;

n = 1;

m is 1,

or its salts or mixtures thereof.

2. Particles under item 1, characterized in that the amino acid selected from alanine-N, N-luxusni acid, methylglycine-N,N-luxusni acid, Soeren-N,N-luxusni acid or mixtures thereof.

3. Particles under item 1 or 2, characterized in that the amino acid is alanine-N,N-dioxyna acid.

4. Particles according to any one of paragraphs.1 to 3, characterized in that the amino acid is methylglycine-N,N-dioxyna acid.

5. Particles according to any one of paragraphs.1 to 4, characterized in that the amino acid as defined in any of paragraphs.1 to 4, or its salt, is mixed with a peroxide compound.

6. Particles according to any one of paragraphs.1 to 5, characterized in that the amino acid as defined in any of paragraphs.1 to 4, or its salt include in the floor.

7. Particles according to any one of paragraphs.1 - 6, characterized in that silent hill 2">

9. Particles in PP.1 to 8, characterized in that the silicate is mixed with a peroxide compound.

10. Particles according to any one of paragraphs.1 to 9, characterized in that the silicate includes in the floor.

11. Particles according to any one of paragraphs.1 to 10, characterized in that the particles contain a compound of magnesium.

12. Particles according to any one of paragraphs.1 - 11, characterized in that the peroxide compound is percarbonate alkali metal.

13. Whitening composition comprising an inert filler and/or one or more substances that are active in the wash, characterized in that it further comprises from about 1 to about 100 wt.% particles according to any one of paragraphs.1 - 12.

14. Washing composition, characterized in that it contains from about 1 to about 40 wt.% particles according to any one of paragraphs.1 - 12.

15. Washing composition according to p. 14, characterized in that as a binding agent contains zeolite.

Priority points:

07.10.94 on PP.1 - 10, 12 - 15;

03.11.94 on p. 11.

 

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