Composition based on organic sulphide with masked odour

FIELD: chemistry.

SUBSTANCE: invention relates to masking the odour of organic sulphides and more specifically to alkyl or dialkyl sulphides, particularly dimethyl sulphide, as well as oxides thereof and particularly dimethyl sulphoxide by adding to said organic sulphides at least one odour masking agent which contains at least one monoester, at least one di- or triester, at least one alcohol, at least one ketone and optionally at least one terpene.

EFFECT: improved properties of the composition.

13 cl, 2 tbl, 3 ex

The present invention relates to the field of organic sulphides and more specifically sulphides of alkyl or dialkyl and, in particular dimethyl sulfide or dimethyl disulfide or DMDS), as well as their oxides and, in particular, DMSO (or DMSO).

It is well known that organic sulfides have mostly strong, unpleasant, even aggressive smell. In particular, DMDS has unpleasant and aggressive smell, related in part to the presence of strong-smelling impurities and partly with garlic and ethereal odor inherent in DMDS. The same is true for the most part, organic sulfides. Mainly the oxides of these organic sulfides, in particular, DMSO have less aggressive smell, but nonetheless, depending on the concentration of impurities, the smell can be unpleasant and repulsive to the end user.

This strong smell interferes with the increasing development of these products, for example, in the case of DMDS, in such applications as sulfonation catalyst or as a filler in the cracking with steam. However, compared with other products with this application, such as trialkylphosphine, DMDS has a number of advantages, in particular, high concentrations of sulfur (68%) and non-coking degradation products (CH₄H₂S). Moreover, in such applications DMDS with the deals of quality, mainly that exceed other products, such as trialkylphosphine.

However, these other products may be less odorous than DMDS and therefore their use may be in some cases preferred.

Currently, there are a number of methods of synthesis of organic sulfides and oxides. The disadvantage of the most used and most cost-effective from a manufacturing standpoint is the formation of by-products responsible for the unpleasant odor of the final products.

For example, methods of synthesis DMDS most efficient and economical is the oxidation of mercaptan sulfur by the reaction:

This oxidation of mercaptan sulfur catalyzed by basic organic and inorganic agents, homogeneous or heterogeneous, periodically or continuously, accompanied by the release of hydrogen sulfide, as well as dimethyldisulfide (CH₃S_xCH₃), in which the number of sulfur atoms x is greater than 2.

To obtain DMDS this method with a higher yield and limited receiving DMPS (dimethyldisulfide, in which the sulfur atoms is greater than 2), the patent EP 0446109, the contents of which are hereby incorporated by reference, proposes a method of receiving comprising two reaction zones, between which is located intermediate the I zone degassing and followed by the distillation zone. Although this method has an advantage in terms of yield and selectivity DMDS, it turns out that in the final product, obtained in this way, there remains a significant amount of mercaptan (MM, about 4000 ppm), and very small amounts of dimethyl sulfide (DMS, about 300 ppm)originating from the mercaptan used or formed during the synthesis of DMDS.

The result of these volatiles is that they give DMDS very unpleasant and aggressive smell and the strong smell is regarded as a significant disadvantage of using this product users.

To mask the smell of organic polysulfides patent US5559271 it is proposed to add to them a certain amount of masking product, such in particular as vanillin or ethylvanillin. Despite the fact that his General formula includes DMDS, this patent specifically relates to the handling of heavy polysulfides, such as, for example, decretoministeriale. The application of this method to DMDS is not possible to effectively mask its unpleasant odor.

In the patent EP 0976726 stated that in the specific case when DMDS contains a small amount of strong-smelling volatile impurities, such as methyl mercaptan and dimethyl sulfide, the most effective agents, masking the smell, chosen from ester is in the General formula R ¹CO₂R²in which R¹is a hydrocarbon of linear or branched radical, possibly unsaturated, containing from 1 to 4 carbon atoms, and R²is a hydrocarbon radical containing from 2 to 8 carbon atoms, linear, branched or cyclic, unsaturated possible.

Currently known solutions for masking odors of organic sulfides and oxides, however, are not entirely satisfactory for these products is a continuing search agents, masking the smell, which would be more efficient and in particular scent perceived by the end user, would be a most pleasant one.

Thus, the object of the invention among others is a composition containing:

a) at least one organic sulfide, possibly in the form of oxide of General formula (1):

in which R is chosen from linear or branched alkyl containing from 1 to 4 carbon atoms, and linear or branched alkenyl containing from 2 to 4 carbon atoms; n is 0, 1 or 2; x is an integer selected from 0, 1, 2, 3 or 4, preferably x denotes 1, 2, 3 or 4; R' is chosen from linear or branched alkyl containing from 1 to 4 carbon atoms, and linear or branched Alcanena, soteriades is from 2 to 4 carbon atoms, or only if n=x=0, a hydrogen atom; and

b) at least one agent, a masking scent, containing at least one complex monoether at least one complex of di - and/or triavir at least one alcohol, at least one ketone and possibly at least one terpene.

In accordance with a preferred embodiment of the agent, a masking scent, contains:

b1) from 1% to 40% of the mass. at least one compound monoether;

b2) from 10% to 70% of the mass. at least one complex of di - and/or Trevira;

b3) from 1% to 30% of at least one alcohol;

b4) from 0.5% to 20% of at least one ketone of the formula R^a-CO-R^bin which R^ais a hydrocarbon chain containing from 1 to 6 carbon atoms, linear or branched, may contain one or more unsaturated bonds in one or several double bonds, and R^bdenotes a cyclic hydrocarbon chain or a linear or branched hydrocarbon chain, it is possible, but preferably substituted cyclic structure, R^bcontains from 6 to 12 carbon atoms, this may contain one or more unsaturated bonds in the form of one or more double bonds and, possibly substituted by one or more hydroxyl groups; and

b5) is possible up to 20% of at least one Ter is s.

In the description of the present invention percentages expressed in weight percent, if not opposite directions. The percentage of b1, b2, b3, b4 and b5 expressed in weight percent relative to the total weight of the agent, masking the smell of b). If there is no opposite directions, "ppm" means one-millionth of the weight part.

In accordance with the embodiment component a)used in the composition of the present invention, is an organic sulfide, possibly in the form of oxide, obtained by any known method, or which is commercially available, and preferably with a reduced content of volatile impurities. These impurities are, for instance, methyl mercaptan (MM) and dimethyl sulfide (DMS) in the case of DMDS; for DMSO, the most common impurities are, for example, DMS, DMDS and/or BMTM (bis(methylthio)methane, also known as 2,4-diapente).

Any well-known specialist way intended to remove or at least reduce the content of the above volatile impurities may be suitable, which can be called, without limitation, distillation, evaporation in a stream of inert gas, such as nitrogen, air and other.

In particular, the number of MM and DMS present in DMDS can mainly be significantly reduced by distillation. Pre what gives this method is joint destruction MM, DMS, while traditional methods reduce odor mainly based on the removal of residual mercaptans specific interaction functional mercaptan groups with agent removal, such as the base or oxide alkene in the presence of a base. These methods are ineffective against DMS present in DMDS.

In accordance with a preferred embodiment of the residual amount of MM and DMS after the pickup DMDS do not exceed 100 ppm and 50 ppm, respectively, by weight relative to the DMDS. The residual mercaptan (MeSH) in DMDS should not exceed 500 ppm by weight.

In the case of the DMSO content of impurities, such as DMS, DMDS and/or VMTM should primarily be less than 100 ppm, preferably less than 50 ppm, more preferably less than 10 ppm of each of the impurities taken separately.

In the embodiment, component (a) of the composition according to the invention corresponds to the formula (1A):

in which R and R', identical or different, chosen from linear or branched alkyl containing from 1 to 4 carbon atoms, and linear or branched alkenyl containing from 1 to 4 carbon atoms; n is 0; x is an integer selected from 1, 2, 3 or 4, preferably 2, 3 or 4.

Preferably component a) of formula (1A) is the DMDS.

In another embodiment, implementation is tvline of the invention component (a) of the composition according to the invention corresponds to the formula (1b):

in which R and R', identical or different, chosen from linear or branched alkyl containing from 1 to 4 carbon atoms, and linear or branched alkenyl containing from 1 to 4 carbon atoms; n is 0, 1 or 2; and x is equal to 0.

Preferably component a) formula (1b) is DMSO.

According to the invention the masking odor organic sulfide or organic sulfide and/or one or more of their oxide forms corresponding to the formula (1)described above is obtained by adding to these sulfides or oxides of the composition (b)described above.

An advantage of the present invention is masking the unpleasant odor of at least one organic sulfide and/or its (their) one or more oxides, not chemical changes its nature. Thus, the present invention features a composition comprising a) a predominant amount of at least one organic sulfide of the formula (1)defined above, to which is added a smaller amount of a composition (b)masking the unpleasant smell of the component (a).

Composition with masked the smell of the present invention can be obtained by any known method, simply by combining at least one component a) at least one composition (b), the mask of stocks is. You can, for example, to add at least one composition (b) at least one component a), or Vice versa, is possible in the conditions of mixing and/or maybe when heated. In General, any known method of mixing and/or heating can be used.

A composition according to the invention can, for example, be carried out at atmospheric pressure at a temperature from 0°C to 100°C, preferably from room temperature to about 80°C. the Receipt can also be carried out under pressure or under reduced pressure in the following temperature ranges.

The time required to obtain compositions with masked the smell of the invention varies depending on the nature and quantity of one or more components (a) and one or more of the compositions (b), but also depending on the selected temperature and pressure. Typically, this time corresponds to the time required to obtain a homogeneous mixture with the expected effect of masking the odor of one or more components a); it is usually from several seconds to several minutes, even one or a few hours.

The above method of obtaining can be done periodically (a way to “batch”) or continuously.

Composition (b) are mixed by any known to the specialist by way of component a) in amounts which, of several ppm, for example, 10 ppm to 2%, preferably from 10 ppm to 1 wt%. in relation to the total weight of the composition. The amount of masking agent (composition b) can vary within wide limits specified above, depending on the target of the effect, the intensity of the masked smell, corresponding to a residual content of various impurities that may be present in one or more of components (a), described above, and others.

The amount of the masking agent is less than several ppm may be too small to obtain the desired effect. The amount of masking agent in excess of 2%, can have negative consequences depending on the target applications of organic sulfides and/or oxides.

In the case of DMDS, for example, one of the main benefits of the organic sulfide is increased sulfur content (68%). Too high content of the masking agent in the composition can lead to the reduction of the titer of sulfur and the lowering of the interest of this product in its major applications.

Preferably and as a non-limiting example, the content of one or more masking agents (b) is from 0.001% to 0.5% of the mass. in relation to the total weight of the composition and more specifically in amounts from about 0.1% to 0.5 wt. -%, mainly avno about 0.3%, in particular, if the organic sulfide, odor mask which is DMDS.

Also as a non-limiting example in the case of DMSO maximum content of one or more masking the smell of agents is preferably from 0.001% to 0.2% of the mass. in relation to the total weight of the composition, preferably from 100 ppm to 1000 ppm, for example, about 500 ppm of the mass.

As indicated above, the composition according to the present invention contains at least one composition masking the odor agent (b), and the specified agent contains from 1% to 40%, preferably from 2% to 35%, more preferably from 5% to 30% of the mass. in relation to the total weight of the composition (b) at least one compound monoether specified in b1).

As illustrative, but non-limiting examples of complex monoamino mentioned in b1)include esters of saturated or unsaturated With₂-C₂₀acids, such as acetates, propionate, butyrate, methylbutyrate, pentanoate, hexanoate, heptanoate, caproate, oleates, linoleates, linolenate ethyl, propyl, butyl, penttila, 2-methylbutyl, isoamyl, hexyl, benzyl, phenylethyl, mantila, carvela and others, as well as mixtures thereof.

Most preferred are acetate isoamyl, acetate hexyl, butyrate 2-methylbutyl, butyrate of isoamyl, benzyl acetate, acetate phenylethyl and mixtures of these compounds is s.

The composition of the agent, a masking smell b)also contains at least one complex of di - and/or triavir b2) in an amount of from 10% to 70 wt. -%, preferably from 15% to 65 wt. -%, preferably from 20% to 60 wt. -%, this, without limitation, as at least one complex of di - and/or triavir selected(s) from orthophthalates, such as diethylacetal; citrates such as triethylcitrate; and malonates, such as diethylmalonate.

Agent, a masking smell b)also contains from 1% to 30%, preferably from 5% to 25% of the mass. in relation to the total weight of the composition, of at least one alcohol b3), mostly at least monospar containing from 1 to 30 carbon atoms, preferably from 6 to 20 carbon atoms, more preferably from 8 to 11 carbon atoms, and these atoms form a linear or branched chain, and possibly containing one or more unsaturated bonds in the form of one or more double bonds and may contain 5-or 6-titlenew a cyclic structure, saturated or partially or fully unsaturated.

The above alcohols are preferably monosperma, hydroxyl functional group which is preferably connected with the carbon atom sp². It should be noted that the hydroxyl functional group can also be linked to the carbon atom, VK is uchennym in a cyclic structure, as specified above.

The alcohols used in the composition of the agent, a masking scent, and such as defined above, and mainly as non-limiting examples, which are selected from menthol,neo-menthol, phenethyl alcohol, benzyl alcohol, citronellol, dihydromyrcenol, dihydromorphinone, dimeola, amillenial, geraniol, linalool, tetrahydroindole, tetrahydromyrcenol, nerol and others, as well as mixtures of two or more of them.

Ketone or ketones mentioned above in paragraph b4), choose preferably and as non-limiting examples of damasceno, damascenone, Ivanov, assonov, methylionone, Prambanan (CAS no 5471-51-2) and others, as well as mixtures thereof. The number of one or more ketones is preferably from 0.5% to 20%, preferably from 1% to 10% of the mass. in relation to the total weight of the composition.

Agent, a masking odor may also contain up to 20%, preferably from 1% to 10% of the mass. in relation to the total weight of the composition of at least one terpene.

As non-limiting examples of terpenes listed in paragraph b5)can be, for example, to call terpinena, MIRCEN, lemon, terpinolene, pinene, Sabine, camphene and others, a mixture of two or more of them, as well as essential oil-based terpenes, in particular, those that contain these ingredients.

Additionally, the agent, Maseru is the overall smell, suitable within the present invention may contain small quantities of other agents (aromatic substances), usually used in the field of perfumery, and in particular one or more compounds containing one or more cyclic aldehyde and/or ketone functional groups, which can be called without limitation geranial, neral, citronellal, Menton, ISO-menthone, 1,8-cineole, ascaridole, flavone and mixtures thereof.

Composition b), intended to mask the smell of organic sulfides, such as described above can, if necessary, further contain one or more additives commonly used in this field. Such additives may, for example, without limitation, be selected from solvents, pigments, dyes, preservatives, biocides and others.

The most preferred examples of solvents are alcohols, ethers, esters and glycols. Most preferably the solvent is selected from diethylphthalate, ethylene glycol, propylene glycol, diethylene glycol, dipropyleneglycol, glycols, polypropylenglycol and mixtures thereof and even more preferably from diethylphthalate, dipropyleneglycol and mixtures thereof.

It should be understood that a complex of mono-, di - or triavir present in composition (b) agent, a masking scent, as component b1) and/and and b2), may also have functions of the solvents defined above.

A typical composition of the agent, a masking scent, suitable for organic sulfides and oxide forms of the present invention contains by weight:

- from 5% to 30% of the mass. at least one compound monoether b1)selected from Solidaritate, acylmethyl-2-butyrate, ISO-livetrace, phenylethylamine, ethylcaproic, benzoylacetate, vexillata and mixtures thereof;

- from 20% to 60% of the mass. at least one complex of di - and/or Trevira b2)selected(s) of ortho-phthalates, such as diethylacetal; citrates such as triethylcitrate and malonates, such as diethylmalonate and mixtures thereof;

- from 5% to 25% of at least one alcohol, preferably at least two alcohols, more preferably at least three alcohols, such as described above in b3);

from 1% to 10% of at least one ketone, preferably at least two ketones, more preferably at least three ketones, such as described above in b4); and

from 1% to 10% of at least one, preferably at least two, preferably a mixture of terpenes listed above in b5).

This composition, hereinafter in this text labeled C_imost suitable for masking the smell, to improve the smell of DMDS. This composition C_ican also predominantly COI is to Lisovets masking improve the smell of DMSO.

The following are typical, but not limiting example of such a composition C_iin which each component contains one, several, even all these connections:

Component b1) 16,00%

containing benzoylacetate, exilerated, isoamylase, fenilatilamin, ethylcaproic, acylmethyl-2-butyrate

Component b2)

containing diethylmalonate, diethylphthalate 50,00%

Component b3)

containing phenethyl alcohol, citronellol, geraniol, linalool, CIS-3-hexenol 20,60%

Component b4)

containing 1-(4-hydroxyphenyl)butane-3-one,alpha-irison 4,50%

Component b5)

orange terpenes 7,00%

Other

containing citral, utililty, utilitysponsored 1,90%

These compositions are given as examples and do not limit the potential variety of compositions provided by the present invention defined in the attached claims.

The following examples illustrate the invention without limiting it.

EXAMPLE 1: Composition based on DMDS with a disguised smell

In order to characterize the flavouring composition, allowing the mask to improve the smell of DMDS was developed to test the smell. This procedure allows us to classify the different compositions of the hedonic method.

The conditions of the experiment:

For the performance of the this test smell use 30-litre barrel of polyethylene (PE), each of which is equipped with a cover, which cut the hatch approximately 10 cm x 10 cm, allowing the operator (participant survey) to smell the vapors contained in the barrel.

In each of the barrels is the mold that contains 2 sheets of absorbent paper (chromatography paper). On each sheet pour 1 ml of the test composition. Barrels leave closed for 24 hours at room temperature. Then the evaluation is made blindly.

Respondents in the amount of 10 people in the queue are testing several products within one session (maximum of 3 product per session). They start to smell from the barrel, which is DMDS, which is the control in this study, then one of the test compositions.

In accordance with your preferences survey respondents grade of each of the tested compositions relative to the control, which was arbitrarily given a rating of 5. Estimates put forward by the respondents, ranging from 1 (the most enjoyable product) to 10 (very bad product).

Obtaining test samples:

DMDS, without an agent, a masking scent, is an industrial DMDS company Arkema with a purity equal to 99.7%, and contains less than 100 ppm of mercaptan and less than 50 ppm of dimethyl sulfide (DMS).

In the same DMDS type 3000 h/million flavouring composition having the following composition is: 25% of solidaritat, 50% of diethylacetamide, 15% 2-methylbutyrate, 10% benzoylacetate, as described in patent EP 0976726. This sample is a control sample in the test for smell and is called a sample And the₁.

In the same industrial DMDS company Arkema, without an agent, a masking scent, enter 3000 ppm flavouring composition C_iaccording to the invention defined above. This sample is referred to As₂.

The results:

The results of the test on the smell in the following table 1

The aggregation of these results allows us to calculate the standard deviation and to classify the samples in two groups, exploring PPDS (least significant difference), which in this test is 0,87.

Test PPDS is a statistical test for comparison of mean values and allows you to determine the creature is but do differ in average of 2 samples or not from a statistical point of view.

In the examples of the present invention used statistical parameter is 95%. If the average value does not significantly differ, both samples belong to the same group. If the averages differ significantly, two sample form 2 separate groups (a and b in the examples illustrating the invention).

The same action carried out to compare all samples, allowing the end to get 1, 2 or more groups, each of which consists of samples, average rating which differ insignificantly. These different types of processing was performed using the software FIZZ, version 2.01 (Biosystemes, Couternon, France).

Therefore, there is a very significant statistical difference, showing the perception distinctly more pleasant odor sample And₂than sample And₁.

EXAMPLE 2: Composition based DMSO with a disguised smell

Test smell, similar to that described in example 1 was performed, taking the basis of DMSO instead of DMDS.

Obtaining test samples:

Control DMSO is an industrial grade DMSO company Arkema with a purity equal of 99.97%, which is then injected with 50 ppm of dimethyl sulfide (DMS). This sample is called In₁.

This DMSO, which was introduced 50 ppm of dimethyl sulfide, add 700 ppm flavouring composition C_iaccording to the invention. This sample is referred to as₂

The results of the test on the smell in the following table 2.

As in example 1, the aggregation of these results allows us to calculate the standard deviation and to classify the samples in two groups, exploring PPDS (least significant difference), which in this test is 1.01.

Therefore, there is a very significant statistical difference, showing the perception distinctly more pleasant odor sample₂than sample₁.

EXAMPLE 3: Composition based DMSO with a disguised smell

The same industrial DMSO company Arkema, as in example 2, with a purity of 99.97%, test without the addition of 50 ppm DMS in accordance with the smell test, described in example 2. This sample is called With₁.

To the same industrial DMSO add 150 h/ml of the flavouring composition C _iaccording to the invention. This sample is called With₂.

Test results will smell₁and C₂show that the sample With₂statistically recognized as distinctly more pleasant than the sample With₁.

1. Composition containing:
a) at least one organic sulfide perhaps in the form of oxide of General formula (I)

in which R is selected from linear or branched alkyl containing from 1 to 4 carbon atoms, and linear or branched alkenyl containing from 2 to 4 carbon atoms; n is 0, 1 or 2; x is an integer selected from 0, 1, 2, 3 or 4, preferably x denotes 1, 2, 3 or 4; R' is chosen from linear or branched alkyl containing from 1 to 4 carbon atoms, and linear or branched Alcanena containing from 2 to 4 carbon atoms, or only if n=x=0, a hydrogen atom; and
b) at least one agent, a masking scent, containing at least one complex monoether at least one complex of di - and/or triavir at least one alcohol, at least one ketone and possibly at least one terpene.

2. The composition according to claim 1, in which component a) is selected from dimethyl disulfide and dimethyl sulfoxide.

3. The composition according to claim 1 or 2, in which the agent, a masking scent, contains:
b1) from 1% to 40% of the mass. at least one sonogashira;
b2) from 10% to 70% of the mass. at least one complex of di - and/or Trevira;
b3) from 1% to 30% of at least one alcohol;
b4) from 0.5% to 20% of at least one ketone of the formula R^a-CO-R^bin which R^ais a hydrocarbon chain containing from 1 to 6 carbon atoms, linear or branched, may contain one or more unsaturated bonds in one or several double bonds, and R^bdenotes a cyclic hydrocarbon chain or a linear or branched hydrocarbon chain, it is possible, but preferably substituted cyclic structure, R^bcontains from 6 to 12 carbon atoms, this may contain one or more unsaturated bonds in the form of one or more double bonds and, possibly substituted by one or more hydroxyl groups; and
b5) is possible up to 20% of at least one terpene.

4. The composition according to claim 3, in which the agent, a masking smell b)contains from 1% to 40%, preferably from 2% to 35%, more preferably from 5% to 30% of the mass. in relation to the total weight of the composition of at least one compound monoether b1)selected from esters of saturated or unsaturated With₂-C₂₀acids, such as acetates, propionate, butyrate, methylbutyrate, pentanoate, hexanoate, heptanoate, enroute, oleates, linoleates, linolenate ethyl, PR is the saw, butyl, penttila, 2-methylbutyl, isoamyl, hexyl, benzyl, phenylethyl, mantila, carvela and others, as well as mixtures thereof.

5. The composition according to claim 3, in which the agent, a masking smell b)contains at least one complex of di - and/or triavir b2) in an amount of from 10% to 70 wt. -%, preferably from 15% to 65 wt. -%, preferably from 20% to 60 wt. -%, the selected(s) from orthophthalates (preferably diethylacetamide); citrate (preferably triethyl citrate) and malonate (preferably diethylmalonate).

6. The composition according to claim 3, in which the agent, a masking smell b)contains from 1% to 30%, preferably from 5% to 25% of the mass. in relation to the total weight of the composition (b) at least one alcohol b3), mostly at least monosperma containing from 1 to 30 carbon atoms, preferably from 6 to 20 carbon atoms, more preferably from 8 to 11 carbon atoms, and these atoms form a linear or branched chain, and possibly containing one or more unsaturated bonds in the form of one or more double bonds and may contain 5 - or 6-membered cyclic structure, saturated or partially or fully unsaturated.

7. The composition according to claim 6, in which the alcohol is selected from menthol, neo-menthol, phenethyl alcohol, benzyl alcohol, citronellol, dihydromyrcenol, dihydromorphinone, dimeola, is tullynally, geraniol, linalool, tetrahydroindole, tetrahydromyrcenol, nerol and others, as well as mixtures of two or more of them.

8. The composition according to claim 3, in which the agent, a masking smell b)contains from 0.5% to 20%, preferably from 1% to 10% of the mass. in relation to the total weight of the composition (b) at least one ketone b4)selected(s) from damasceno, damascenone, Ivanov, assonov, methylionone, Prambanan and others, as well as mixtures thereof.

9. The composition according to claim 3, in which the agent, a masking smell b)may contain up to 20%, preferably from 1% to 10% of the mass. in relation to the total weight of the composition of at least one terpene b5)selected(s) of terpineol, myrcene, limonene, terpinolene, Pimenov, sabinene, camphene, and others, and mixtures of two or more of them, as well as essential oils on the basis of terpenes, in particular those that contain these ingredients.

10. The composition according to claim 1, in which the agent, a masking scent, contains by weight:
- from 5% to 30% of the mass. at least one compound monoether b1)selected from Solidaritate, acylmethyl-2-butyrate, ISO-livetrace, phenylethylamine, ethylcaproic, benzoylacetate, vexillata and their mixtures;
- from 20% to 60% of the mass. at least one complex of di - and/or Trevira b2)selected(s) of ortho-phthalates (preferably diethylacetamide); citrate (preferably triethylcitrate) and mA is the courses (preferably diethylmalonate) and mixtures thereof;
- from 5% to 25% of at least one alcohol, preferably at least two alcohols, more preferably at least three of the alcohols b3);
from 1% to 10% of at least one ketone, preferably at least two ketones, more preferably at least three ketones b4); and
from 1% to 10% of at least one, preferably at least two, preferably a mixture of terpenes b5).

11. The composition according to claim 1, in which the agent, a masking smell b), is present in the amount of 10 hours/million to 2%, preferably from 10 am/million up to 1% of the mass. in relation to the total weight of the composition.

12. The composition according to claim 1, in which the organic sulfide (a) is dimethyl disulfide, and the number of agent, masking the smell of b)is from 0.001% to 0.5% of the mass. in relation to the total weight of the composition and more specifically in amounts from about 0.1% to 0.5 wt. -%, mostly is about 0.3%.

13. The composition according to claim 1, in which the organic sulfide (a) is dimethyl sulfoxide and the number of agent, masking the smell of b)is from 0.001% to 0.2% of the mass. in relation to the total weight of the composition, preferably from 100 h/m to 1000 hours/million, for example, 500 weight. hours/million