ES2244196T3 - WHITENING AND DISINFECTION AGENTS. - Google Patents

Abstract

The invention relates to new bleaching and disinfecting agents which contain, in relation to the agents, (a) between 1 and 6 weight % alkali metal hypochlorites, (b) between 0.5 and 5 weight % alkylether sulfates and/or amino oxides, (c) between 0.5 and 2 weight % alkali metal hydroxides, (d) between 0.5 and 3 weight % electrolyte salts, (e) between 0.01 and 1 weight % tetrahydromyrcenol, and (f) between 0 and 4 weight % fatty acid salts, provided that the above quantities are completed to 100 weight % by the addition of water and possibly other aids and additives. These preparations have a sufficiently high viscosity as well as a very good storage stability, dispersing power for colour pigments and stability in chlorine.

Description

Bleaching and disinfection agents.

Field of the Invention

The invention relates to bleaching agents and new aqueous disinfection, containing metal hypochlorites alkalines, surfactants, electrolytic salts and tetrahydromyrcenol in reasons of defined quantities.

State of the art

In the past, such bleaching agents based in alkali metal hypochlorites, which have a viscosity Notably, they have proven useful in the fields of hygiene and disinfection, but also in textile treatment, and therefore, They are suitable for both horizontal surface treatment as well as inclined and especially vertical surfaces. The viscosity of these agents causes the contact time between these and the surfaces to be treated are essentially larger that in the case of usual commercial liquid products, which they flow quickly from surfaces.

In the past, there have been no attempts to Prepare this type of viscous bleaching and disinfection agents. Thus, for example, it was found that certain surfactants or Surfactant mixtures are responsible for a thickening effect on aqueous hypochlorite solutions. In the document EP-A 0274885 (ICI) is advised, for example, the use of mixtures of linear and branched amine oxides. According to teaching of document EP-A 0145084 (Unilever), for this purpose, mixtures of oxides of amine with soaps, sarcosinates, taurates or saccharic esters. TO from memories EP-A 0079102, EP-A 0137551 and EP-A 0447261 (Unilever), the use of amine oxides with soap or sarcosinate and other anionic surfactants, for example, alkyl sulfates, alkylene ether sulfates, secondary alkanesulfonates or alkylbenzenesulfonates as thickener components. In the document EP-A 0156438 is informed of the use of alkylarylsulfonates as thickening agents in bleaching agents aqueous containing certain stilbene dyes such as optical whiteners Object of the ES-A document 8801389 (Henkel Iberian) are bleaching agents based on aqueous hypochlorite solutions containing as components surfactants especially alkylether sulfates and also small proportions of amine oxides. In addition, from the document EP-A1 0447261 compositions of agents of aqueous bleaching with a sodium hypochlorite content and anionic surfactants. However, the concentration of hypochlorite of these agents is found in 0.1 to 8 and preferably 0.5 to 5% by weight of active chlorine. In the patent German DE-C1 4333100, the applicant already proposes Stable aqueous bleaching and cleaning agents, sufficiently viscous, based on hypochlorites, fatty alcohol ethersulfates and amine oxides, which contain as mandatory components phosphonic acids of amine oxides. Although these contribute from decisive way to thickening the agent, however they cannot stabilize the content of active chlorine. From US memory 4,588,514 (Unilever) bleaching agents are finally known alkaline hypochlorite, which contain amine and small oxides amounts of alkylether sulfates and soaps to adjust the viscosity. However, the preparations have a high 7% by weight hypochlorite ratio. When transferring teaching to modern bleaching agents with low chlorine content active, products are obtained that are not even thick enough or stable during storage. In addition, it refers to the International Patent Application WO 93/08247 (Clorox) which is refers to alkaline cleaners with a content in alkylene ether sulfates and terpene derivatives, as well as the publication for European patent application information EP-A2 0651051 (Clorox) that releases gel-shaped hypochlorite preparations, which contain a ternary thickening agent system composed of soap, oxide amine or betaine and terpene derivatives. Patent application European EP-A-622451 describes agents bleaching hypochlorite scented, naming tetrahydromyrcenol as a stable perfume against bleaching. Not given to know if it increases the viscosity of the agents that contain alkylene ether sulfates or mixtures thereof with amine oxides. Application European Patent EP-A-129980 describes bleaching agents containing hypochlorite with quaternary alkoxysilanes and amine oxides, whose viscosity can be increased by the addition of secondary alcohols and Tertiary This memory also contains no indication of whether tetrahydromyrcenol could increase the viscosity of the agents with other surfactant compositions.

Therefore, the object of the invention has consisting of making available new bleaching agents and aqueous disinfection characterized by a viscosity high enough and stable for low chlorine content active. Finally, an additional objective has been to develop thickening agents for bleaching agents with hypochlorite that can still assume other objectives in the formulations

Description of the invention

Object of the invention are bleaching agents and disinfection they contain, with respect to the agents,

(to)

of the 1 to 6% by weight of alkali metal hypochlorites,

(b)

of the 0.5 to 5% by weight of alkylene ether sulfates or alkylene ether sulfates and amine oxides, defined in detail below,

(C)

of the 0.5 to 2% by weight of alkali metal hydroxides,

(d)

of the 0.5 to 3% by weight of electrolytic salts,

(and)

of the 0.01 to 1% by weight of tetrahydromyrcenol and

(F)

of the 0 to 4% by weight of fatty acid salts,

with the proviso that the Indications of quantities are completed up to 100% with water, as well as optionally, other adjuvants and additives

Surprisingly it has been found that bleaching and disinfecting agents of the composition provided no they are only stable against chlorine, but by adding tetrahydromyrcenol is also obtained a sufficiently high viscosity high and steady In this sense, the invention includes the discovery that tetrahydromyrcenol not only produces a thickening effect, but also acts as a substance stable aromatic against active chlorine, which facilitates the formulation and in this way can lead to an economic advantage, since other perfumes that They are usually noticeably more expensive.

Alkali metal hypochlorites

For alkali metal hypochlorites should understood as hypochlorite of lithium, potassium and especially sodium. The hypochlorites can preferably be used in amounts of from 2 to 4% by weight, with respect to the agents.

Alkylene ether sulfates

Alkyl ether sulfates represent known anionic surfactants that are obtained by sulfation of nonionic surfactants of the alkyl polyglycol ether type and subsequent neutralization. The alkylene ether sulfates that are considered in the sense of the agents according to the invention follow the formula (I),

(I) R 1 O- (CH 2 CH 2 O) n SO 3 X

in which R 1 represents a alkyl moiety with from 12 to 18 carbon atoms, n numbers from 2 to 5 and X sodium or potassium. Typical examples are the sodium salts of sulfates from the adduct of 2,3 and 3 OE to 2-alcohol of coco C_ {12/14}. The alkylene ether sulfates may have a conventional or narrow homolog distribution. Preferably alkylene ether sulfates are used in amounts from 2 to 4% by weight, with respect to Agents

Amine oxides

Amine oxides also represent known substances that are occasionally assigned to cationic surfactants, however usually at nonionic surfactants. For its production it is based on amines tertiary fats that normally have either an alkyl moiety long and two short or two long and one short, and they oxidize in presence of hydrogen peroxide. The amine oxides that are consider in the sense of the invention follow the formula (II)

\melm{\delm{\para}{R ^{4} }}{N}{\uelm{\para}{R ^{3} }}

--->O(II) R2 ---

 \ melm {\ delm {\ para} {R 4}} {N} {\ uelm {\ para} {R 3}}} 

---> O

in which R2 represents a linear or branched alkyl moiety with from 12 to 18 carbon atoms, just as R 3 and R 4, independently of each other, represent R 2 or an alkyl moiety optionally substituted with hydroxyl with 1 to 4 carbon atoms. Preferably, oxides are used of amine of formula (II) in which R 2 and R 3 represent C 12/18 alkyl moieties of coconut and R 4 a methyl moiety or hydroxyethyl. Also, the amine oxides of the formula are preferred (II) in which R 2 represents a C 12/14 alkyl moiety or C 12/18 of coconut and R 3 and R 4 have the meaning of a methyl or hydroxyethyl moiety. Preferably the oxides are used of amine in amounts from 1.5 to 3% by weight, with regarding the Agents

Alkali metal hydroxides

As alkali metal hydroxides, consider potassium hydroxide and especially sodium hydroxide, which are preferably used in amounts from 1.5 to 2% by weight, with respect to the agents, and serve to adjust the pH value at an optimal value from 12.5 to 14.

Electrolytic salts

Typical examples of electrolytic salts Suitable are carbonates, chlorides, silicates, phosphates and alkaline and alkaline earth phosphonates, as well as their mixtures. Preferably, sodium or potassium carbonate or chloride are used that not only produce the desired buffer effect of the preparation, but also also a sequestration of metal ions, especially heavy metal ions. An additional advantage It also consists of its low price and its easy incorporation. Preferably the electrolytic salts are used in amounts. from 1 to 2% by weight, with respect to the agents.

Tetrahydromyrcenol

Tetrahydromyrcenol follows the formula (IV). He terpene is obtained by hydrogenation of myrcenol, which represents a precursor for the production of geraniol and Citronellol

one

Preferred amounts of use are found in from 0.1 to 0.5% by weight, with respect to the agents.

Fatty acid salts

Like other components, agents according to invention may contain fatty acid salts of formula (III)

(III) R 5 CO-OX

wherein R 5 CO represents an acyl moiety with from 12 to 22 carbon atoms and X an alkali metal. Typical examples are the sodium and / or potassium salts of lauric acid, myristic acid, palmitic acid, palmoleic acid, stearic acid, isostearic acid, oleic acid, elaidic acid, petroselinic acid, linoleic acid, linolenic acid, elaeostearic acid, araicic acid , gadoleic acid, behenic acid and erucic acid, as well as their industrial mixtures, as produced by pressure dissociation of fats and industrial acids. Preferably, industrial coconut and tallow fatty acid salts are used. As the formulations according to the invention are highly alkaline adjusted, instead of the salts, fatty acids that are neutralized in situ can also be used when incorporated into the mixture. Preferably the fatty acid salts are used in amounts of from 0.5 to 2% by weight, with respect to the agents.

Industrial applicability

The agents according to the invention have immediately after production a viscosity greater than 500 mPas, measured at 20 ° C on a Brookfield viscometer, are stable during storage, wear resistant chlorine and stand out for an excellent dispersion capacity for pigments-dyes. Another object of the invention is refers to the use of tetrahydromyrcenol as an aromatic substance stable against chlorine and thickening agent in bleaching agents and disinfection containing hypochlorites.

As adjuvants and additives, which may be also contained in the preparations, are considered, for example, other surfactants or hydrotropes stable against chlorine, as per eg, alkyl sulfates, alkyl sulfonates, alkyl benzenesulfonates, xylene sulphonates, sarcosinates, taurates, isethionates, sulfosuccinates, betaines, saccharic esters, polyglycol ethers of fatty alcohols and alkyl oligoglycosides. Preferably, the sum of these additional surfactants is a maximum of 10% by weight of the total amount of surfactants in the formulation. In this In this sense, the combined use of alkyl sulfates is especially preferred in amounts from 0.5 to 3% by weight. In addition, the agents may contain other aromatic substances, bleaching agents Optics, dyes and pigments stable against active chlorine in total amounts of 0.01 to 0.5% by weight, with respect to Agents Among the known aromatic substances, resistant to active chlorine, for example, monoterpenic alcohols monocyclic and bicyclic, as well as their esters with acetic acid or propionic (for example, isoborneal, dihydroterpenic oil, isobornyl acetate, dihydroterpenyl acetate). As for the optical brighteners, for example, may be salt acid potassium 4,4'-bis- (1,2,3-triazolyl) - (2) -stilbin-2,2-sulfonic acid, which is marketed under the brand Phorwite® BHC 766. As pigments colored are considered, among others, green chlorophthalocyanine (Pigmosol® Green, Hostaphine® Green) or Solar Yellow® BG 300 yellow (Sandoz) As sequestering agents, they can also be contained, polyacrylates, phosphonic acids of amine oxides and sulphonates of lignin, as well as its mixtures in amounts from 0.1 to 2 and preferably 0.5 to 1% by weight, with respect to Agents The production of the agents according to the invention takes place by agitation. Optionally, the product obtained can decant or filter to separate foreign bodies and / or agglomerates

Examples

The viscosity was determined at 20 ° C with the help of a Brookfield viscometer (RVT model, spindle No. 1 or No. 2, 200 rpm). To determine the stability against chlorine they were stored test mixtures under the influence of daylight in a colorless plastic bottle and chlorine content was determined active. Formulations 1 to 7 are according to the invention, the Formulations V1 to V3 serve to compare. The results are summary in table 1 (indications of amounts in% by weight).

TABLE 1 Viscosity, storage stability, chlorine wear and cleaning power

2

Claims (8)

1. Bleaching and disinfection agents that contain, with respect to the agents,

(to)

of the 1 to 6% by weight of alkali metal hypochlorites,

(b)

of the 0.5 to 5% by weight of alkylene ether sulfates or alkylene ether sulfates and amine oxides, so that alkylene ether sulfates correspond with the formula (I),

(I) R 1 O- (CH 2 CH 2 O) n SO 3 X in which R 1 represents a alkyl moiety with from 12 to 18 carbon atoms, n numbers from 2 to 5 and X sodium or potassium and the amine oxides the formula (II), (II) R2 ---

 \ melm {\ delm {\ para} {R 4}} {N} {\ uelm {\ para} {R 3}}} 

---> O in which R2 represents a linear or branched alkyl moiety with from 12 to 18 carbon atoms, just as R 3 and R 4, independently of each other, represent R 2 or an alkyl moiety optionally substituted with hydroxyl with 1 to 4 atoms of carbon,

(C)

of the 0.5 to 2% by weight of alkali metal hydroxides,

(d)

of the 0.5 to 3% by weight of electrolytic salts,

(and)

of the 0.01 to 1% by weight of tetrahydromyrcenol and

(F)

of the 0 to 4% by weight of fatty acid salts,

with the proviso that the Indications of quantities are completed up to 100% with water, as well as optionally, other adjuvants or additives 2. Agents according to claim 1, characterized in that they contain sodium hypochlorite. 3. Agents according to claim 1 or 2, characterized in that they contain sodium hydroxide. 4. Agents according to one of claims 1 to 3, characterized in that it contains electrolytic salts that are selected from the group consisting of carbonates, chlorides, silicates, phosphates and alkaline and / or alkaline earth phosphonates. 5. Agents according to one of claims 1 to 4, characterized in that they contain fatty acid salts of formula (III) (III) R 6 CO-OX in which R 6 CO represents a acyl residue with 12 to 22 carbon atoms and X a metal alkaline. 6. Agents according to one of claims 1 to 5, characterized in that they contain sequestering agents that are selected from the group consisting of polyacrylates, phosphonic acids of amine oxides and lignin sulphonates. 7. Agents according to one of claims 1 to 6, characterized in that immediately after production they have a viscosity greater than 500 mPas, measured at 20 ° C in a Brookfield viscometer. 8. Use of tetrahydromyrcenol as a substance stable aromatic against chlorine and thickening agent in agents bleaching and disinfection containing hypochlorites, which contain alkylene ether sulfates or alkylene ether sulfates and oxides.