DE102018127564A1 - Process for protecting organic colorant, process for coloring an eyeglass lens, use of thiosulfate, colorant bath and colored eyeglass lens - Google Patents

Abstract

The invention relates to a method for protecting at least one organic colorant against oxidation and / or reduction in a colorant preparation, at least one inorganic and / or organic thiosulfate compound being added to the colorant preparation. The invention further relates to a method for coloring an eyeglass lens with a colorant preparation, the method comprising the following step: contacting the eyeglass lens with a colorant preparation while coloring the eyeglass lens, the colorant preparation comprising water and / or at least one organic solvent, at least one organic colorant and at least one comprises an inorganic and / or organic thiosulfate compound. The invention also relates to the use of at least one inorganic and / or organic thiosulfate compound and a colored spectacle lens.

Description

The present invention relates to the provision of a method for protecting a colorant, in particular an organic colorant, in a colorant preparation and a method for coloring an eyeglass lens. The invention further relates to the use of thiosulfate, a colorant bath and a colored spectacle lens.

Colored eyeglass lenses can be produced by coloring uncolored eyeglass lenses, for example by immersing the uncolored eyeglass lenses in a dye bath for a sufficient period of time. The intensity of the coloring of the lens can be controlled over the period of immersion. In order to be able to guarantee a reproducible coloring of the lenses, the quality of the dye bath is, among other things, essential. An important quality factor is the stability of the colorant used in the colorant bath. The colorant used is usually an organic colorant or a mixture of different organic colorants. This organic colorant (s) are sensitive to chemical oxidation and / or reduction. In particular, an elevated bath temperature, for example at approximately 100 ° C., can lead to oxidation processes which change or destroy the organic colorant (s). As a result, there may be a discrepancy in the degree of coloring of the lenses when coloring lenses, which is undesirable. Different staining methods for spectacle lenses are known in the prior art. For example, wet chemical diffusion processes, thermal transfer processes, immersion or spin coat processes, vacuum coating processes or bulk dyeing processes are used.

For example, aqueous colorant baths are used in wet chemical diffusion processes. These dye baths contain, for example, water, disperse dyes, dispersing agents and possibly other auxiliaries. The bath temperature of an aqueous colorant bath is, for example, in a range from 60 ° C to 100 ° C. The spectacle lens to be colored is then immersed in the colorant bath. During the immersion process in the colorant bath, the disperse dye or the disperse dyes can diffuse into the spectacle lens, as a result of which the spectacle lens is colored.

A disadvantage when dyeing a spectacle lens using a wet chemical diffusion process is the short shelf life and, consequently, the short useful life of the dye baths, since disperse dyes contained in the dye bath can decompose oxidatively and thus the dyeing performance of the dye bath is reduced.

The European patent EP 1 856 562 B1 relates to the use of UV absorber solutions in the manufacture of an ocular device, for example glasses or intraocular lenses. The UV dye in the UV absorber solution is stabilized by an antioxidant. Citric acid in the form of a lemon juice concentrate is preferably used as the antioxidant.

The object of the present invention is to protect a colorant, in particular an organic colorant, used in the coloring of spectacle lenses against redox processes, in particular against oxidation, in particular in a process for coloring a spectacle lens.

Another object of the present invention is to extend the life and life of a dye bath.

Another object of the present invention is to provide a colored spectacle lens.

The object on which the invention is based is achieved by providing a method for protecting at least one colorant, in particular at least one organic colorant, against oxidation and / or reduction in a colorant preparation, at least one inorganic and / or organic thiosulfate compound being added to the colorant preparation. The colorant preparation is preferably used for coloring an eyeglass lens. More preferably, the colorant preparation is a colorant bath or is used in a colorant bath.

• Inkontaktbringen des Brillenglases mit wenigstens einer Farbmittelzubereitung unter Einfärben des Brillenglases, wobei die Farbmittelzubereitung Wasser und/ oder
• wenigstens ein organisches Lösungsmittel, wenigstens ein Farbmittel und
• wenigstens eine anorganische und/ oder wenigstens eine organische Thiosulfatverbindung umfasst.

The object on which the invention is based is further achieved by providing a method for coloring a spectacle lens, the method comprising the following step:

• Bringing the spectacle lens into contact with at least one colorant preparation while coloring the spectacle lens, the colorant preparation being water and / or
• at least one organic solvent, at least one colorant and
• comprises at least one inorganic and / or at least one organic thiosulfate compound.

The object on which the invention is based is also achieved by the use of at least one inorganic and / or at least one organic thiosulfate compound in a colorant preparation comprising at least one organic colorant, preferably in a colorant bath, preferably for coloring eyeglass lenses.

The object of the invention is further achieved by providing a colorant preparation containing at least one organic colorant, the colorant preparation containing at least one inorganic and / or organic thiosulfate compound.

Preferred developments of the invention are specified in the respective dependent claims.

The object on which the invention is based is also achieved by providing an eyeglass lens colored with at least one organic colorant, the colored eyeglass lens being or containing an organic eyeglass lens and wherein the colored eyeglass lens has at least one inorganic and / or organic thiosulfate compound.

The organic spectacle lens can, for example, be based on one of the basic materials mentioned in the table below: Trade name Basic material Average refractive index n * Abbe number v * CR 39, CR 330, CR 607, CR 630, RAV 700, 7NG, 7AT, 710, 713, 720 Polyallyl diglycol carbonate ((P) ADC) 1,500 56 RAVolution Polyurea / polyurethane 1,500 54 Trivex Polyurea / polyurethane 1.530 45 Panlite, Lexan Polycarbonate (PC) 1,590 29 MR6 Polythiourethane 1,598 MR8 Polythiourethane 1,598 41 MR 7 Polythiourethane 1,664 32 MR 10 Polythiourethane 1,666 32 MR 174 Polyepisulfide 1,738 32 MGC 1.76 Polyepisulfide 1.76 30th * Based on sodium D line

According to a preferred variant, the organic spectacle lenses to be used according to the invention preferably have a plastic material that is selected from the group consisting of polythiourethane, polyepisulfide, polymethyl methacrylate, polycarbonate, polyallyldiglycol carbonate, polyacrylate, polyurethane, polyamide, polysulfone, polyallyl, fumaric acid polymer, polystyrene, bi-methyl acrylate and mixtures thereof, is selected. The organic spectacle lenses preferably consist of one of the plastics mentioned above or a mixture thereof.

In a further preferred embodiment of the invention, the spectacle lens comprises or consists of a plastic material that is selected from the group consisting of polythiourethane, polyepisulfide, polymethyl methacrylate, polycarbonate, polyallyldiglycol carbonate, polyacrylate, polyurethane, polyamide, polysulfone, polyallyl, fumaric acid polymer, polystyrene, polymethyl acrylate , Biopolymers and mixtures thereof is selected.

In a further preferred embodiment of the invention, the spectacle lens comprises or consists of a plastic material which is selected from the group consisting of polythiourethane, polyepisulfide, polycarbonate, polyallyldiglycol carbonate and mixtures thereof.

Polyallyldiglycol carbonate has proven to be a very suitable plastic material for the manufacture of the spectacle lenses.

Organic glasses that have been identified as MR6, MR7, MR8, MR10, MR20, MR174, CR39, CR330, CR607, CR630, RAV700, RAV7NG, RAV7AT, RAV710, RAV713, RAV720, Trivex, Panlite have proven to be very suitable , MGC 1.76, RAVolution have available plastics.

The plastics available under the names CR39, MR7, MR8 are preferably used for the manufacture of the spectacle lenses.

The organic spectacle lenses preferably have a refractive index from a range from 1.50 to 1.70, in particular from 1.50, 1.59, 1.60, or 1.67.

The organic spectacle lenses preferably have an Abbe number from a range from 20 to 65, more preferably from 29 to 56.

In the method according to the invention for coloring an eyeglass lens, the eyeglass lens to be colored can be brought into contact both with only a single colorant preparation and in succession with different colorant preparations. Alternatively or in addition to the alternatives mentioned above, the spectacle lens to be colored can be brought into contact with the same colorant preparation in succession. This can be the case, for example, if the spectacle lens to be colored does not yet have the shade to be achieved after being brought into contact with the colorant preparation.

The colorant preparation to be used according to the invention comprises at least one colorant. According to a colorant DIN EN ISO 18451-1: 2017-12 , Paragraph 2.19 to understand all coloring substances and include both the insoluble pigments in the application medium and the dyes soluble in the application medium. Pigments are in accordance DIN EN ISO 18451-1: 2017-12 , Paragraph 2.95, consisting of solid particles, colorants insoluble in the application matrix. Dyes are according to DIN EN ISO 18451-1: 2017-12 Colorants soluble in the application medium.

For the purposes of the invention, the term “at least one colorant” includes both a single colorant, that is to say a single type of colorant, and a mixture of different colorants, for example of at least 2, 3, 4, 5, 6, 7, 8, 9 or 10 colorants, unless otherwise stated.

According to a preferred embodiment, a mixture of different colorants contains at least 2, at least 3 or at least 4 colorants, more preferably at least 2 or at least 3 colorants, further preferably at least 3 colorants.

According to the invention, a mixture of different colorants is preferably present in the colorant preparation, in which the color impression perceived by the eye is generated by color mixing, preferably subtractive color mixing. When using three colorants in the basic colors red, green and blue, each color shade can be set depending on the respective proportions. For example, when three different colorants are used, by color mixing, preferably by subtractive color mixing, from the basic colors blue, yellow and red, depending on the relationship to one another, the colors blue, green, brown, gray, which are common for sunglasses, for example, but also pink, for example, can be produced . Depending on requirements, the color (s) of a lens can also be generated from just one (number: 1) or two basic colors. The colored spectacle lens can comprise only a single color or at least two different colors. If the colored spectacle lens comprises only a single color, the spectacle lens can be colored in a single color or have a color gradient, for example from dark to light. The color gradient of the spectacle lens from dark to light can, for example, run such that the spectacle lens in a spectacle frame comprises the dark area of the color gradient in the upper half and the lighter area of the color gradient in the lower half of the spectacle lens. If the colored spectacle lens comprises at least two different shades of color, there can be a defined boundary between the at least two different shades of color which defines different areas of the colored spectacle lens in which only a single shade is uni-colored or in the form of a color gradient. Alternatively, the at least two different hues can merge into one another by means of a color gradient.

According to a further embodiment, the colorant is a single (number: 1) colorant.

When using several colorants, for example three different colorants, preferably in the colors red (R), green (G) and blue (B) to produce a color tone, the respective proportions of the individual colorants in the colorant preparation determine, inter alia, that of Eye of an observer perceived color through color mixing, preferably subtractive color mixing. This perceived color corresponds in colorimetry to a color location in a color space, preferably a CIELab color space. If the relative proportions of the individual non-oxidized colorants change due to oxidation processes in a colorant preparation, the color locus in the color space is shifted. A viewer perceives a shift in the color location as a changed color impression.

The method according to the invention or the colorant preparation according to the invention preferably enables a constant coloring of lens blanks, ie preformed pieces of material for the production of a lens in any state before the surface treatment is finished DIN EN ISO 13666: 2013-10 , Paragraph 8.4.1, of semi-finished spectacle lens products, ie of lens blanks with only one optically finished surface in accordance with DIN EN ISO 13666: 2013-10 , Paragraph 8.4.2, or of finished spectacle lenses, ie of spectacle lenses with two finished optical surfaces before or after the edge processing according to DIN EN ISO 13666: 2013-10 , without a color location shift noticeable by a viewer, preferably without a color location shift. The spectacle lens semi-finished products can be used as single-vision spectacle lens semi-finished products, multi-vision spectacle lens semi-finished products or progressive lens spectacle semi-finished products DIN EN ISO 13666: 2013-10 , Paragraphs 8.4.3, 8.4.4 and 8.4.5. The finished spectacle lenses can be single-vision lenses, multi-vision lenses, two-strength lenses, three-strength lenses, progressive lenses or degressive lenses DIN EN ISO 13666: 2013-10 , Paragraphs 8.3.1, 8.3.2, 8.3.3, 8.3.4, 8.3.5 and 8.3.6.

If an eyeglass lens is mentioned in the context of this application, it is preferably a finished eyeglass lens according to DIN EN ISO 13666: 2013-10 .

When used in or as a colorant bath or when used in the process according to the invention, the colorant preparation according to the invention has a temperature in the range from preferably 50 to 100 ° C., preferably 80 to 99 ° C., more preferably 85 to 95 ° C. Substantially constant color locus, preferably constant color locus, for a period of preferably at least 4 days, preferably at least 5 days, more preferably at least 6 days, more preferably at least 8 days, more preferably at least 10 days, more preferably at least 12 days , more preferably from at least 14 days, more preferably from at least 18 days, more preferably from at least 20 days.

An essentially constant color locus is preferably understood to mean that eyeglass lenses colored by means of the colorant preparation according to the invention have no color difference after the visual assessment in the periods mentioned above. In particular, a colored spectacle lens, which is provided in a spectacle frame for the left eye, should not differ from one another after a visual assessment, from a spectacle lens which is provided in the same spectacle frame for the right eye. The human eye should not be able to perceive any color difference between the two glasses in the same frame and this is preferred regardless of the dioptric effect of these two glasses.

An essentially constant color locus is furthermore preferably understood to mean that the color difference ΔE in the CIELab color space for a left and a right spectacle lens which are intended for use in the same spectacle frame is more preferably bei 1, preferably ≤ 0.5 is ≤ 0.4, very particularly preferably ≤ 0.3 and very particularly preferably ≤ 0.2. The above-mentioned values for ΔE preferably apply regardless of the dioptric effect of the spectacle lens.

An essentially constant color location is furthermore preferably understood to mean that the color distance ΔE of spectacle lenses of the same color which are not intended for use in the same spectacle frame is ≤ 4, preferably ≤ 3, more preferably ≤ 2, particularly preferably ≤ 1 and whole is particularly preferably ≤ 0.5. Above values for ΔE apply regardless of the dioptric effect of the lens.

The color location is preferably measured in each case in the CIELab color space on the basis of a colored spectacle lens in the far viewpoint by means of a spectrophotometer, preferably with the spectrophotometer UltraScan PRO, from FMS Jansen GmbH & Co. KG HunterLab. The remote viewpoint is according to DIN EN ISO 13666: 2013-10 the assumed position of the point of view on an eyeglass lens for viewing into the distance.

The at least one colorant or mixture of different colorants used in the present invention may be in water and / or in at least one organic solvent and / or in an aqueous organic solvent, i.e. a mixture of water and organic solvent, dissolved, soluble or dispersible colorant or colorant mixture.

A dissolved colorant is preferably a colloidally dissolved colorant, particularly preferably a colorant colloidally dissolved in a surfactant solution.

In a further embodiment of the invention, the at least one colorant is at least one pigment, preferably at least one organic pigment. In this case, the at least one pigment is preferably in finely divided form, preferably in nanoparticulate and / or microparticulate form. In this embodiment of the invention, the colorant preparation comprises the at least one pigment in dispersed form in at least one solvent. In this embodiment, the colorant preparation according to the invention preferably comprises at least one solvent, preferably water or a mixture of water and at least one organic solvent, and at least one organic pigment.

In a preferred embodiment, the colorant dispersion is present in at least one solvent as a supersaturated colorant dispersion. In the case of a colorant dispersion, preferably an oversaturated colorant dispersion, a first part of at least one colorant is undissolved as a finely dispersed solid and a second part of the respective at least one colorant is in solution. A solubility equilibrium exists between the undissolved, finely dispersed colorant and the colorant present in solution. At least one dissolved colorant diffuses into the spectacle lens during the coloring process. The at least one dissolved colorant from the dispersion is consumed by the diffusion of the at least one colorant into the spectacle lens. Due to the solubility equilibrium, the portion consumed from the solution is replaced from the undissolved portion of the dispersion within the scope of the solubility equilibrium. Thus, the undissolved portion of a colorant dispersion, i.e. the dispersed colorants represent a reservoir. This enables the coloring of spectacle lenses with a constant degree of color over a period of several days to weeks in a colorant preparation.

If the colorant preparation comprises at least one pigment, its mean particle size is in a range from D ₅₀ = 0.001 to 1 μm, preferably from D ₅₀ = 0.002 to 0.5 μm, more preferably from D ₅₀ = 0.003 to 0.1 μm preferably from D ₅₀ = 0.004 to 0.01 µm. The D ₅₀ value of the cumulative frequency distribution of the volume-averaged size distribution function, as obtained by laser diffraction methods, indicates that 50% of the pigments measured have a volume-average diameter which is equal to or less than the value given in each case. The D ₅₀ value of the pigments is preferably determined using the Cilas 1064 device from Quantachrome Instruments in accordance with the manufacturer's instructions. The scattered light signals are evaluated according to Mie theory, which also includes the refraction and absorption behavior of the pigments.

According to the invention, the at least one colorant to be protected comprises at least one organic colorant, preferably at least one organic colorant. The at least one colorant to be protected preferably does not comprise any inorganic colorant.

In the context of the invention, a “spectacle lens” is also understood to mean a plurality of spectacle lenses. The terms “glasses” and “glasses” are used interchangeably here.

In the sense of the invention, “protecting a colorant, in particular an organic colorant, against oxidation and / or reduction” is understood to mean that the at least one colorant against redox influences, i.e. is or is protected or stabilized against oxidative and / or reductive influences, preferably against oxidative influences.

For the purposes of the invention, a “colorant preparation” is understood to mean a composition which contains at least one colorant, preferably at least one organic colorant or a mixture of organic colorants. The colorant preparation is preferably a liquid colorant preparation containing at least one colorant. The colorant preparation can be, for example, a colorant solution containing at least one organic dye or a mixture of different organic dyes and / or a colorant dispersion containing at least one organic pigment or a mixture of different organic pigments. According to a preferred variant of the invention, the colorant preparation according to the invention is a mixture of at least one colorant solution and at least one colorant dispersion in a, preferably aqueous, solvent, more preferably in water.

The inventor has found that, surprisingly, inorganic and / or organic thiosulfates are suitable as a redox inhibitor, in particular as an antioxidant, for at least one organic colorant, preferably at least one organic colorant, or a mixture of different organic colorants, preferably a mixture of different organic colors. to protect or stabilize against oxidative and / or reductive influences, in particular against oxidative influences, in a colorant preparation. The present invention therefore relates to the use of the inorganic thiosulfates and / or organic thiosulfates described below in a colorant preparation comprising at least one organic colorant, preferably at least one organic colorant, in particular in a colorant bath, in particular for and / or in the coloring of spectacle lenses.

Furthermore, it has surprisingly been found that both the inorganic thiosulfate compounds and mixtures of inorganic and organic thiosulfate compounds have a sufficient buffer capacity, so that a further addition of buffer substances to stabilize the pH in a colorant preparation, preferably a colorant bath, is not necessary. It has also surprisingly been found that the addition of one or more inorganic and / or organic thiosulfate compounds does not lead to a significant change in the pH of a colorant preparation, in particular a colorant bath.

In contrast to other antioxidants, such as, for example, ascorbic acid, citric acid, tartaric acid, hydroquinones, beta-carotenes or flavonoids, inorganic and / or organic thiosulfates surprisingly do not have an increased reducing power. If the reduction capacity of the antioxidant is too strong, there is the problem that the at least one organic colorant, in particular the at least one organic colorant, is protected against oxidative influences, but can be reductively damaged by the antioxidant itself. For example, the use of sodium sulfite, sodium bisulfite or sodium metabisulfite leads to reductive damage to organic colorants, especially organic dyes.

In the method according to the invention for protecting at least one organic colorant, in particular at least one organic colorant, against oxidation and / or reduction, in particular against oxidation, in a colorant preparation, at least one inorganic and / or organic thiosulfate compound is added to the colorant preparation.

Damage to at least one organic colorant, especially at least one organic colorant, i.e. of an individual organic colorant or a mixture of organic colorants, can occur in particular when used in a colorant preparation, in particular at an elevated temperature of the colorant preparation, which can be, for example, about 90 to 100 ° C.

According to the invention, the at least one inorganic and / or organic thiosulfate compound can be brought into contact, preferably mixed, with at least one organic colorant before use in a colorant preparation.

According to a variant of the invention, the mixture obtained can be in the form of a dry mixture. According to another variant of the invention, the mixture obtained is in liquid form, for example as a dispersion or as a solution. According to a preferred variant, the colorant preparation is in the form of a colorant dispersion, preferably in the form of a liquid colorant dispersion, more preferably in the form of a liquid supersaturated colorant dispersion. According to a further variant, the colorant preparation is in the form of a dye solution.

The colorant preparation according to the invention can be present as a concentrate which is suitable by adding further components, for example water and / or organic solvent is diluted. For example, the colorant preparation according to the invention can be in the form of a 2-fold, 5-fold, 10-fold or even a 20-fold concentrate, in each case based on the final colorant concentration in a colorant preparation, in particular a colorant bath for coloring glasses lenses.

According to a preferred variant of the method according to the invention, the at least one inorganic and / or organic thiosulfate compound in powder form is added to a dry colorant preparation to provide a dry thiosulfate compound-containing colorant preparation, which can be a precursor of a liquid colorant preparation, preferably a colorant bath. The colorant preparation is preferably in the form of a dispersion in a, preferably aqueous, solvent, more preferably in water.

According to a further preferred variant of the process according to the invention, the at least one inorganic and / or organic thiosulfate compound of a liquid colorant preparation, which is preferably present as a colorant dispersion, is added to provide a liquid thiosulfate compound-containing colorant preparation which can be referred to as a stabilized liquid colorant preparation. The at least one inorganic and / or organic thiosulfate compound can be added to the liquid colorant preparation in powder form or in liquid form, for example as a solution or dispersion. In this process variant, the at least one inorganic and / or organic thiosulfate compound is preferably added in liquid form, i.e. either in dissolved or dispersed form.

The colorant preparation according to the invention obtainable by means of the method according to the invention can also be present as a colorant bath, preferably a ready-to-use colorant bath.

In addition to at least one organic colorant, preferably at least one organic dye, and optionally water and / or organic solvent, the colorant preparation according to the invention can also contain one or more additives. In the colorant preparation according to the invention, the additives can each be present in an amount of up to 10% by weight, preferably from 0.001 to 7% by weight, more preferably from 0.05 to 5% by weight, further preferably from 0.1 to 2 , 5 wt .-%, may be included, each based on the total weight of the colorant preparation.

In the process according to the invention, the additives can be added in a separate step or together with the at least one inorganic and / or organic thiosulfate compound. In a further variant of the invention, the at least one additive is already present together with the at least one organic colorant, preferably at least one organic colorant, or a mixture of different organic colorants, preferably a mixture of different organic colorants.

The additive can be selected from the group consisting of surface-active compounds, for example surfactants, dispersing aids, solubilizers, bactericides, algicides, fungicides, anti-foaming agents and mixtures thereof.

The colorant preparation according to the invention, preferably a colorant bath, preferably contains at least one surfactant.

For the purposes of the invention, “surfactant” includes both ionic surfactant, i.e. anionic or cationic surfactant, non-ionic, i.e. neutral surfactant as well as amphoteric, i.e. zwitterionic surfactant, understood.

In a preferred embodiment of the present invention, the colorant preparation contains at least one surfactant in an amount of up to 5% by weight, preferably from 0.001% by weight to 3% by weight, more preferably from 0.01% by weight to 2 , 5% by weight, more preferably from 0.1% by weight to 2% by weight, more preferably from 0.5% by weight to 1% by weight, in each case based on the total weight of the colorant preparation.

In a preferred embodiment of the invention the surfactant is selected from the group consisting of alkyl benzene sulfonate, alkyl naphthalene sulfonate, alkyl sulfosuccinate, aromatic sulfonic acid-formalin condensate, lauryl sulfonate, polyoxyethylene alkyl ether, polyoxyethylene alkyl ether sulfate, Alkylaminether, polyoxyethylene, hexadecyltrimethylammonium bromide, hexadecylpyridinium chloride, 4- (1,1 , 3,3-tetramethylbutyl) phenyl-polyethylene glycol, and mixtures thereof, is selected, wherein alkyl is 1 to 24 carbon atoms, preferably 6 to 18 carbon atoms.

In the method according to the invention for coloring an eyeglass lens, the eyeglass lens is brought into contact with at least one colorant preparation comprising at least one organic colorant while coloring the eyeglass lens, the colorant preparation being water and / or organic solvent, preferably water, at least one organic colorant or a mixture of different ones includes organic colorants and at least one inorganic and / or organic thiosulfate compound.

According to a further variant of the method according to the invention for coloring an eyeglass lens, the eyeglass lens is brought into contact with at least one colorant preparation comprising at least one organic colorant while coloring the eyeglass lens, the colorant preparation comprising water and organic solvent, preferably water and aromatic organic solvent, more preferably water and Benzyl alcohol, at least one organic colorant or a mixture of organic colorants and at least one inorganic and / or organic thiosulfate compound.

According to the invention, only water is used as the solvent according to a variant of the invention.

According to a further variant of the invention, a mixture of water and at least one organic solvent is used as the solvent, the proportion of at least one organic solvent, preferably at least one aromatic solvent, in the mixture preferably being in a range of up to 15% by volume. , more preferably from 0.1 to 10% by volume, even more preferably from 0.3 to 5% by volume, even more preferably from 0.5 to 3% by volume, in each case based on the total volume of the Solvent. A proportion of 1.5% by volume to 2.5% by volume of at least one organic solvent, preferably at least one aromatic organic solvent, has proven to be very suitable.

According to a preferred variant, benzyl alcohol is used as at least one aromatic organic solvent. The proportion of benzyl alcohol in a mixture with water is preferably in a range from 0.1 to 10% by volume, more preferably from 0.3 to 5% by volume, even more preferably from 0.5 to 3% by volume. %, still more preferably from 1.5 to 2.5% by volume, in each case based on the total volume of the solvent mixture.

When the colorant preparation containing at least one inorganic and / or organic thiosulfate and at least one organic colorant is brought into contact with the spectacle lens, the at least one organic colorant or the mixture of organic colorants enters the spectacle lens to be colored, for example by diffusion. The degree of coloration of the spectacle lenses can be controlled, for example, by the concentration of the at least one organic colorant in the colorant preparation and / or by the duration of the action of the respective organic colorant preparation on the spectacle lenses.

In the method according to the invention, the colorant preparation can be brought into contact with the spectacle lens, for example by spraying the spectacle lens with at least one colorant preparation, flooding the spectacle lens with at least one colorant preparation or immersing the spectacle lens in at least one colorant preparation. The spectacle lens is preferably colored by immersing it in at least one colorant preparation, preferably by immersing it in at least one colorant bath.

Furthermore, the speed of the coloring of the spectacle lenses can also be increased by moving, preferably stirring, the colorant preparation, for example in the respective colorant bath. By stirring the colorant preparation, preferably in a colorant bath, the diffusion boundary layers between the colorant preparation and the spectacle lens to be colored are reduced. In a colorant preparation, preferably in a colorant bath, which is not stirred, the concentration of the at least one colorant decreases due to its diffusion into the spectacle lens, the diffusion along the concentration gradient for the subsequent delivery of the at least one colorant to at least one surface of the spectacle lens is insufficient.

In the method according to the invention for coloring an eyeglass lens, the step of bringing the eyeglass lens and at least one colorant preparation into contact, preferably in at least one colorant bath, can be repeated once, twice, three times or more. The step of bringing the lens and at least one colorant preparation into contact can also be repeated once, twice, three times or more in several colorant baths that differ from one another. In the latter case, at least one of the colorant baths can be used at least twice.

For example, after a first coloring, the colored spectacle lens can be briefly washed with water and / or solvent in order to remove colorant preparation located on the surface of the spectacle lens. The colored spectacle lens can then optionally be dried. This sequence of coloring, washing and optional drying can be repeated once, twice, three times or more in succession until, for example, the desired degree of coloring of the spectacle lens has been reached.

According to a further variant of the method according to the invention for coloring an eyeglass lens, colorant preparations with identical or different organic colorant (s) can also be used in the successive coloring steps.

According to the invention, the colorant preparation can be partially or completely dissolved or dispersed in water and / or organic solvent. According to the invention, the at least one organic dye or the mixture of organic dyes can be partially or completely dissolved in water and / or organic solvent and / or the at least one organic pigment or the mixture of organic pigments can be dispersed in water and / or organic solvent.

The solvent can also be a mixture of water and organic solvent, in which water and organic solvent are mixed together. For example, the proportion of organic solvent can range from 0 to 90% by volume, more preferably from 1 to 30% by volume, still more preferably from 2 to 10% by volume, based in each case on the total volume of the solvent , amount. The rest to 100 vol .-% is water.

In a preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one organic colorant or the mixture of organic colorants is dissolved and / or dispersed in water and / or organic solvent. At least one organic solvent or a mixture of different organic solvents and water can be used in the processes according to the invention if the at least one organic colorant, the at least one organic pigment and / or the at least one optionally used additive do not have sufficient solubility or dispersibility in water . If, for example, the at least one organic colorant used has hydrophobic properties, the use of at least one organic solvent, optionally in combination with water, can be advantageous in order to sufficiently dissolve or disperse the at least one organic colorant.

In a variant of the invention, the colorant preparation according to the invention contains a mixture of water and at least one organic solvent as solvent.

In a further preferred embodiment, the colorant preparation according to the invention is present as a supersaturated colorant dispersion and comprises a mixture of water and at least one organic solvent, preferably a mixture of water and at least one aromatic organic solvent, more preferably a mixture of water and benzyl alcohol, and at least one organic Dye. The average particle size of the at least one dispersed dye in the supersaturated colorant dispersion is preferably in a range from D ₅₀ = 0.001 to 1 µm, preferably D ₅₀ = 0.002 to 0.5 µm, more preferably D ₅₀ = 0.003 to 0.1 µm, more preferably D ₅₀ = 0.004 to 0.01 µm.

In a further variant of the invention, the colorant preparation according to the invention contains at least one organic solvent as solvent.

In a preferred further embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one organic colorant or the mixture of organic colorants is dissolved, partially dissolved and / or dispersed in water. The use of water, preferably the exclusive use of water, as the solvent is preferred in view of ecological aspects. Accordingly, water is used as the solvent in the processes according to the invention or in the colorant preparation according to the invention if the at least one organic colorant used for coloring the spectacle lens has sufficient solubility or dispersibility in water. In this variant of the invention, the colorant preparation according to the invention contains water, preferably exclusively water, as the solvent. Optionally, at least one organic solvent, preferably at least one aromatic organic solvent, for example benzyl alcohol, preferably in an amount of less than 15% by volume, preferably from 0.1 to 10% by volume, still more preferably from 0.3 to 5% by volume, still more preferably from 0.5 to 3% by volume, still more preferably from 1.5 to 2.5% by volume, in each case based on the total volume of organic solvent and water, to be added. The at least one organic solvent, in particular benzyl alcohol, preferably acts as a solubilizer for the at least one organic colorant or a mixture of organic colorants.

In a preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one organic solvent from the group consisting of at least one aliphatic solvent and at least one aromatic organic solvent and mixtures thereof, preferably from alcohol, ketone, ester, nitrile and mixtures of which is selected.

In a further preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one organic solvent is selected from the group consisting of alcohol, ketone, ether, ester and mixtures thereof.

In a further preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one organic solvent is selected from the group consisting of alcohol, ester, ether and mixtures thereof.

In a further preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one organic solvent is or comprises alcohol. The alcohol can be aliphatic and / or aromatic alcohol.

Aliphatic alcohol is preferably methanol, ethanol, n-propanol, isopropanol, n-butyl alcohol, 2-butanol, tert-butanol or mixtures thereof.

Aromatic alcohol is preferably benzyl alcohol, (1-hydroxyethyl) benzene, (2-hydroxyethyl) benzene or mixtures thereof. Benzyl alcohol is extremely preferred.

The ester is preferably methyl acetate, ethyl acetate, n-butyl acetate or mixtures thereof.

The aromatic solvent is preferably nitrobenzene, toluene, o-xylene, m-xylene, p-xylene, anisole, chlorobenzene or mixtures thereof. An ether is preferably diethylene glycol dibutyl ether, diethylene glycol diethyl ether, diethylene glycol dimethyl ether, diisopropyl ether, ethylene glycol monoethyl ether, ethylene glycol monomethyl ether, 1,4-dioxane or mixtures thereof.

The ketone is preferably isobutyl methyl ketone or 2-heptanone.

All of the aforementioned organic solvents can be used in the processes according to the invention or the colorant preparation according to the invention in combination with water to provide an aqueous organic solvent.

In a further preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the solvent is water.

In a preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the solvent is selected from the group consisting of water, ethanol, 1-propanol, 2-propanol, benzyl alcohol, methyl isobutyl ketone and mixtures thereof.

In a preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the solvent is selected from the group consisting of water, benzyl alcohol and mixtures thereof. For example, in a mixture of water and benzyl alcohol, the proportion of benzyl alcohol can be in a range from 0.01 to 10% by volume, more preferably from 0.1 to 5% by volume, even more preferably from 0.5 to 3 Vol .-%, still more preferably from 0.8 to 2.5 vol .-%, each based on the total volume of the solvent. The rest to 100 vol .-% is water.

In the context of this invention, “organic dye” is preferably understood to mean an organic dye which absorbs in the ultraviolet and / or visible and / or infrared wavelength range.

According to a preferred embodiment of the invention, the organic dye is a UV absorber, which absorbs in particular in a wavelength range from 100 to 400 nm, preferably from 210 nm to 380 nm, more preferably from 280 nm to 320 nm.

According to a further preferred embodiment of the invention, the organic dye is an organic dye which absorbs in the visible wavelength range, in particular in a wavelength range from 400 nm to 700 nm.

According to a further preferred embodiment of the invention, the organic dye is an IR absorber, which absorbs in particular in a wavelength range from 780 nm to 3000 nm, preferably from 800 nm to 1400 nm.

In a preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one organic colorant, preferably the at least one organic dye, is used in an amount of 0.005% by weight to 20% by weight, based on the total weight of the colorant preparation, used.

In a further preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one organic colorant, preferably the at least one organic dye, is used in an amount of 0.01% by weight to 15% by weight, more preferably 0 , 02% by weight to 10% by weight, more preferably from 0.03% by weight to 8% by weight, more preferably from 0.04% by weight to 6% by weight, more preferably from 0.05% by weight to 5% by weight, still more preferably from 0.06% by weight to 2% by weight, even more preferably from 0.07% by weight to 1.5% by weight %, based in each case on the total weight of the colorant preparation.

In a preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one organic dye from the group consisting of benzophenones, benzotriazoles, triazines, diphenylacrylates, anthraquinones, phenylamines, methines, quinophthalones, azo dyes, spirooxazines, phthalocyanines, chromenes, pyrans , Fulgides, spironaphthoxazines, spiropyrans, naphthopyrans, triarylmethanes, stilbenes, azastilbenes, nitrones, quinones and mixtures thereof.

In a further preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one organic dye from the group consisting of benzophenones, benzotriazoles, diphenyl acrylates, anthraquinones, phenylamines, methines, quinophthalones, azo dyes, spirooxazines, phthalocyanines, chromenes, pyrans, Fulgids, spironaphthoxazines, spiropyrans, naphthopyrans, triarylmethanes, stilbenes, azastilbenes, quinones and mixtures thereof is selected.

In a particularly preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one organic dye from the group consisting of benzophenones, benzotriazoles, diphenyl acrylates, anthraquinones, phenylamines, methines, quinophthalones, azo dyes, spirooxazines, phthalocyanines, spironaphthoxazines, spiropyrans, Naphthopyrans, triarylmethanes, quinones and mixtures thereof.

In a very particularly preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one organic dye from the group consisting of benzophenones, benzotriazoles, anthraquinones, phenylamines, methines, azo dyes, spirooxazines, phthalocyanines, spironaphthoxazines, azines, triarylmethanes and mixtures of which is selected.

In a preferred embodiment of one of the processes according to the invention or the colorant preparation according to the invention, the at least one benzophenone from the group consisting of 2,2 ', 4, 4'-tetraoctylbenzophenone, 2-hydroxybenzophenone, 2,4-dihydroxybenzophenone, 2-hydroxy- 4-acryloylethoxybenzophenone, 2-hydroxy-4- (2-acryloyloxy) ethoxybenzophenone, allyl-2-hydroxybenzophenone, 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,4'- dimethoxybenzophenone-5,5'-bis (sodium sulfonate), 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, 2-hydroxy-4-methacryloxybenzophenone, 4-hydroxy-4'-methacryloxybenzophenone, 4-methoxy-4'-methacryloxybenzophenone, 4-octyloxy-4'-methacryloxybenzophenone, 4-decyloxy-4'-methacryloxybenzophenone, 4-dodecyloxy-4'-methacryloxybenzophenone, 4-benzyloxy-4'-methacryloxybenzophenone, 4,2,2'-trihydroxy-4'-methacryloxybenzophenone, 2- Hydroxy-4-n-acetoxybenzophenone, 2-hydroxy-4- (2-hydroxy-3-methacryloxy) propoxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 4-hydroxy-4-methoxybenzophenone, 2-hydroxy-4 -n-octyloxybenzophenone and mixtures thereof.

In a further preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one benzophenone from the group consisting of 2,2 ', 4,4'-tetrahydroxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone -5,5'-bis (sodium sulfonate), 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2-hydroxy-4-methoxybenzophenone , 2-hydroxy-4-n-acetoxybenzophenone, 2-hydroxy-4- (2-acryloyloxy) ethoxybenzophenone, 2-hydroxy-4- (2-hydroxy-3-methacryloxy) propoxybenzophenone, 2,2'-dihydroxy-4 -methoxy-benzophenone, 4-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octyloxybenzo-phenone and mixtures thereof.

In a preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one benzotriazole from the group consisting of 2- (2'-hydroxyphenyl) -2H-benzotriazole, 5'-methyl-3'5'-di-tert -butyl-2- (2'-hydroxyphenyl) -2H-benzotriazole, 5 '- (1,1,3,3-tetramethylbutyl) -2- (2'-hydroxyphenyl) -2H-benzotriazole, 5-chloro-3' , 5'-di-tertbutyl-2- (2'-hydroxyphenyl) -2H-benzotriazole, 5-chloro-3'-tertbutyl-5'-methyl-2- (2'-hydroxyphenyl) -2H-benzotriazole, 3 ' -Isobutyl-5'-tert-butyl-2- (2'-hydroxyphenyl) -2H-benzotriazole, 4'-octyloxy-2- (2'-hydroxyphenyl) -2H-benzotriazole, 3'5'-di-tert-amyl- 2- (2'-hydroxyphenyl) -2H-benzotriazole, 2- (2-hydroxy) -2H-benzotriazole, 2- (2-hydroxy-5-vinylphenyl) -2H-benzotriazole, 2- (2-hydroxy-5- acrylyloxyphenyl) -2H-benzotriazole, 2- (2-hydroxy-3-methacrylamidomethyl-5-tertoctylphenyl) benzotriazole, 2- (2H-benzotriazol-2-yl) -6-dodecyl-4-methylphenol, 2- (2H-benzotriazole -2-yl) -4,6-di-tert-pentylphenol, 2- (2H-benzotriazol-2-yl) -4- (1,1,3, 3-tetramethylbutyl) phenol, 2 (2'-hydroxy-3 ', 6' (1,1-dimethylbenzylphenyl) benzotriazole, 2 (2'-hydroxy-5-octyl-5-phenyl) benzotriazole, 2 (2'-hydroxy -3 ', 5'-di-tert-amylphenyl) benzotriazole, bis- [2-hydroxy-5-methyl-3- (benzotriazol-2-yl) phenyl] methane, bis- [2-hydroxy-5-tert- octyl-3 (benzotriazol-2-yl) phenyl] methane and mixtures thereof.

In a further preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one benzotriazole from the group consisting of 2- (2H-benzotriazol-2-yl) -6-dodecyl-4-methylphenol, 2- (2H- Benzotriazol-2-yl) -4,6-di-tert-pentylphenol, 2- (2H-Benzotriazol-2-yl) -4- (1,1,3,3-tetramethylbutyl) phenol, 2 (2'-hydroxy -5'-methylphenylbenzotriazole, 2 (2'-hydroxy-3 ', 6' (1,1-dimethylbenzylphenyl) benzotriazole, 2 (2'-hydroxy-5-octyl-5-phenyl) benzotriazole, 2 (2'-hydroxy -3 ', 5'-di-tert-amylphenyl) benzotriazole, bis- [2-hydroxy-5-methyl-3- (benzotriazol-2-yl) phenyl] methane, bis- [2-hydroxy-5-tert- octyl-3 (benzotriazol-2-yl) phenyl] methane and mixtures thereof.

In a preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one diphenyl acrylate from the group consisting of ethyl 2-cyano-3,3-diphenyl acrylate, (2-ethylhexyl) -2-cyano-3,3- diphenyl acrylate and mixtures thereof is selected.

In a preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the anthraquinone is selected from the group consisting of 1,3-dihydrospiro [2H-anthra [2,3-d] imidazole-2,1'-cyclohexane] -5, 10-dione, 1,3-dihydrospiro [2H-anthra [2,3-d] imidazole-2,1'-cyclohexane] -6,11-dione, 1,3-dihydro-4- (phenylthio) spiro [2H -anthra-1 ', 2-diimidazole-2,1'-cyclohexane] -6,11-dione, CI Disperse Yellow 13, C.I. Disperse Yellow 51, C.I. Disperse Red 4, C.I. Disperse Red 11, C.I. Disperse Red 15, C.I. Disperse Red 55, C.I. Disperse Red 60, C.I. Disperse Red 86, C.I. Disperse Red 91, C.I. Disperse Red 92, C.I. Disperse Red 127, C.I. Disperse Red 189, C.I. Disperse Red 302, C.I. Disperse Red 302: 1, C.I. Disperse Blue 27, C.I. Disperse Blue 54, C.I. Disperse Blue 56, C.I. Disperse Blue 73, C.I. Disperse Blue 280, C.I. Disperse Violet 26, C.I. Solvent Violet 36, and mixtures thereof.

In a preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one spiropyran from the group consisting of 2-phenyl-3-methyl-7-methoxy-8'-nitrospiro [4H] -1-benzopyran-4, 3 '- [3H] -naphtho [2,1-bipyran], spiro [2H-1-benzopyran-2,9'-xanthene], 8-methoxy-1', 3'-dimethylspiro (2H-1-benzopyran 2,2 '- (1'H) -quinoline), 2,2'-spiro-bi- [2H-1-benzopyran], 5'-amino-1', 3 ', 3'-trimethylspiro [2H-1 -benzopyran-2,2'-indoline], ethyl-β-methyl-β- (3 ', 3'-dimethyl-6-nitrospiro (2H-1-benzopyran-2,2'-indolin-1'-yl) -propenoate, (1,3-propanediyl) bis [3 ', 3'-dimethyl-6-nitrospiro [2H-1-benzopyran-2,2'-indoline], 3,3'-dimethyl-6-nitrospiro [2H -1-benzopyran-2,2'-benzoxazoline], 6'-methylthio-3,3'-dimethyl-8-methoxy-6-nitrospiro [2H-1-benzopyran-2,2'-benzothiozoline], (1, 2-ethanediyl) bis [8-methoxy-3-methyl-6-nitrospiro [2H-1-benzopyran-2,2'-benzothiozoline], N-N'-bis (3,3'-dimethyl-6-nitrospiro [ 2H-1-benzopyran-2,2 '(3'H) -benzothioazol-6'-yl) decanediamide] and M is selected.

In a preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one azo dye from the group consisting of C.I. Disperse Yellow 5, C.I. Disperse Yellow 114, C.I. Disperse Yellow 211, C.I. Disperse Orange 30, C.I. Disperse Orange 73, C.I. Disperse Red 54, C.I. Disperse Red 58, C.I. Disperse Red 73, C.I. Disperse Red 152, C.I. Disperse Red 229, C.I. Disperse Red 279, C.I. Disperse Red 323, C.I. Disperse Violet 33, C.I. Pigment Orange 36, C.I. Pigment Yellow 13, and mixtures thereof, is selected.

In a preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one phenylamine from the group consisting of C.I. Disperse Yellow 33, C.I. Disperse Yellow 42, C.I. Disperse Yellow 86 and mixtures thereof is selected.

In a preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one quinoline from the group consisting of C.I. Disperse Yellow 54, C.I. Disperse Yellow 64 and mixtures thereof is selected.

In a preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one phthalocyanine from the group consisting of C.I. Pigment Blue 15, C.I. Pigment Green 7 and mixtures thereof is selected.

In a preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, a methine from the group consisting of C.I. Disperse Yellow 201, C.I. Solvent Yellow 179 and mixtures thereof is selected.

In a preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one organic dye from the group consisting of 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, 2-hydroxy-4-n-acetoxybenzophenone, 2- (2'-Hydroxy-5-5-octylphenyl) benzotriazole, 2- (2'-Hydroxy-3 ', 6' (1,1-dimethylbenzylphenyl) benzotriazole, 2- (2'-Hydroxy-3 ', 5 '-di-t-amylphenyl) benzotriazole, bis- [2-hydroxy-5-methyl-3- (benzotriazol-2-yl) phenyl] methane, bis- [2-hydroxy-5-t-octyl-3 ( benzotriazol-2-yl) phenyl] methane, 2-hydroxy-4- (2-acrylocyloxy) ethoxybenzophenone, 2-hydroxy-4- (2-hydroxy-3-methacryloxy) propoxybenzophenone, 2,2'-dihydroxy-4 -methoxybenzophenone, 2,4-dihydroxybenzophenone, 2,2'-dihydroxy 4,4-dimethoxybenzophenone, 2,2 ', 4,4'-tetrahydroxybenzophenone, ethyl 2-cyano-3,3-diphenylacrylate, 2-ethexyl-2- Cyano-3,3-diphenyl acrylate, 2 ', 2', 4-trihydroxybenzophenone, 2-hydroxy-4-acryloyloxyethoxybenzophenone (polymer), 2-hydroxy-4-acryloyloxyethoxybenzophenone, 4-Hy droxy-4-methoxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone and mixtures thereof.

In a preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one organic colorant from the group consisting of C.I. Disperse Yellow 5, C.I. Disperse Yellow 13, C.I. Disperse Yellow 33, C.I. Disperse Yellow 42, C.I. Disperse Yellow 51, C.I. Disperse Yellow 54, C.I. Disperse Yellow 64, C.I. Disperse Yellow 71, C.I. Disperse Yellow 86, C.I. Disperse Yellow 114, C.I. Disperse Yellow 201, C.I. Disperse Yellow 211, C.I. Disperse Orange 30, C.I. Disperse Orange 73, C.I. Disperse Red 4, C.I. Disperse Red 11.5 C.I. Disperse Red 15, C.I. Disperse Red 54, C.I. Disperse Red 55, C.I. Disperse Red 58, C.I. Disperse Red 60, C.I. Disperse Red 73, C.I. Disperse Red 86, C.I. Disperse Red 91, C.I. Disperse Red 92, C.I. Disperse Red 127, C.I. Disperse Red 152, C.I. Disperse Red 189, C.I. Disperse Red 229, C.I. Disperse Red 279, C.I. Disperse Red 302, C.I. Disperse Red 302: 1, C.I. Disperse Red 323, C.I. Disperse Blue 27, C.I. Disperse Blue 54, C.I. Disperse Blue 56, C.I. Disperse Blue 73, C.I. Disperse Blue 280, C.I. Disperse Violet 26, C.I. Disperse Violet 33, C.I. Solvent Yellow 179, C.I. Solvent Violet 36, C.I. Pigment Blue 15, C.I. Pigment Blue 80, C.I. Pigment Green 7, C.I. Pigment Orange 36, C.I. Pigment Orange 36, C.I. Pigment Yellow 13, C.I. Pigment Violet 23, C.I. Pigment Violet 37, C.I. Pigment Black 1, C.I. Pigment Black6, C.I. Pigment Black 7 and mixtures thereof is selected.

In a preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one is inorganic and / or organic Thiosulfate compound in an amount ranging from 0.001% by weight to 5% by weight, more preferably from 0.005% by weight to 3% by weight, more preferably from 0.01% by weight to 2.5% by weight %, more preferably from 0.02% by weight to 2.2% by weight, more preferably from 0.03% by weight to 1.9% by weight, more preferably from 0.04% by weight. % to 1.6% by weight, more preferably from 0.05% by weight to 1.3% by weight, more preferably from 0.06% by weight to 0.9% by weight, in each case based on the total weight of the colorant preparation used.

In a further preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one inorganic and / or organic thiosulfate compound is present in an amount from a range from 0.05% by weight to 15% by weight, more preferably from 0, 1% by weight to 12% by weight, more preferably from 0.15% by weight to 10% by weight, more preferably from 0.3% by weight to 8% by weight, more preferably from 0 , 5% by weight to 7% by weight, more preferably from 0.8% by weight to 6% by weight, more preferably from 1% by weight to 4% by weight, in each case based on the total weight of the at least one organic colorant or based on the total weight of a mixture of different colorants used.

In the processes according to the invention or the colorant preparation according to the invention, at least one inorganic thiosulfate compound, exclusively at least one organic thiosulfate compound, or a mixture of at least one inorganic thiosulfate compound and at least one organic thiosulfate compound can be used as the at least one inorganic and / or organic thiosulfate compound.

In a preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one thiosulfate compound is an inorganic thiosulfate.

In a preferred embodiment of one of the methods according to the invention or the colorant preparation according to the invention, the at least one thiosulfate compound is an organic thiosulfate.

According to a preferred variant of the methods according to the invention or the colorant preparation according to the invention, alkali thiosulfates and / or alkaline earth thiosulfates are used as inorganic thiosulfates.

The at least one inorganic thiosulfate compound is preferably ammonium thiosulfate and / or preferably has a chemical structure according to the formulas (I) to (IV): M ^I ₂ S ₂ O ₃ (I), M ^II S ₂ O ₃ (II), M ^I 3 [Ag (S ₂ O ₃ ) 2] (III), M ^I ₃ [Au (S ₂ O ₃ ) ₂ ] (IV), where M ^{I stands} for a single charged cation and M ^II for a double charged cation. M is preferably ^I = Li, Na, K, Rb or Cs; and M ^II = Mg, Ca, Sr, Ba, Zn or Fe.

In a preferred variant of the invention, ie in the processes according to the invention and the colorant preparation according to the invention, the at least one inorganic thiosulfate compound from the group consisting of ammonium thiosulfate and thiosulfate compounds having the formula (I), thiosulfate compounds having the formula (II) and mixtures thereof exists, selected: M ^I ₂ S ₂ O ₃ (I) M ^II S ₂ O ₃ (II) where M ^I = Li, Na, K, Rb and / or Cs, and M ^II = Mg, Ca, Sr, Ba, Zn and / or Fe.

In a preferred variant of the invention, the at least one inorganic thiosulfate compound is selected from the group consisting of ammonium thiosulfate and compounds of the formula (I) and mixtures thereof: M ^I ₂ S ₂ O ₃ (I) where M ^I = Li, Na, K, Rb and / or Cs.

According to a preferred embodiment of the invention, the inorganic thiosulfate is selected from the group consisting of ammonium thiosulfate, sodium thiosulfate, potassium thiosulfate, barium thiosulfate and mixtures thereof.

According to a further preferred variant of the invention, ammonium thiosulfate is used as the inorganic thiosulfate.

In a preferred embodiment of the invention, the at least one organic thiosulfate compound is selected from the group consisting of compounds of the formulas (V) to (VIII) and mixtures thereof: (NR ¹ R ² R ³ R ⁴ ) ₂ S ₂ O ₃ (V), (NR ¹ R ² R ³ R ⁴ ) S ₂ O ₃ X (VI), R ⁵ -S ₂ O ₃ X (VII), XO ₃ S ₂ - (CH ₂ ) _m -R ⁶ -R ⁷ -R ⁸ - (CH ₂ ) _n -S ₂ O ₃ X (VIII), where R ¹ , R ² , R ³ and R ^{4 are} each independently the same or different and is an organic radical selected from the group consisting of alkyl having 1 to 20 carbon atoms and alkylaryl having 7 to 20 carbon atoms, is selected means where the alkyl radical is straight-chain or branched, where R ¹ to R ^{3 can} also independently of one another stand for hydrogen, and
where X = H, Li, Na, K, Rb and / or Cs, and
wherein R ^{5 is} an organic radical which is selected from the group consisting of unsubstituted or substituted alkyl which is straight-chain or branched, having 1 to 20 C atoms, unsubstituted or substituted alkenyl which is straight-chain or branched, having 2 to 20 C. -Atoms, unsubstituted or substituted cycloalkyl with 3 to 20 C atoms, unsubstituted or substituted cycloalkenyl with 3 to 20 C atoms, unsubstituted or substituted aryl with 5 to 20 C atoms and unsubstituted or substituted heteroaryl with 4 to 20 C atoms , is selected, and
wherein R ⁶ , R ⁷ and R ^{8 are} each independently the same or different and is an organic radical selected from the group consisting of unsubstituted or substituted alkyl, which is straight-chain or branched, having 1 to 20 C atoms, unsubstituted or substituted Alkenyl which is straight-chain or branched, with 2 to 20 C atoms, unsubstituted or substituted cycloalkyl with 3 to 20 C atoms, unsubstituted or substituted cycloalkenyl with 3 to 20 C atoms, unsubstituted or substituted aryl with 5 to 20 C - Atoms and
unsubstituted or substituted heteroaryl having 4 to 20 C atoms, is selected, and
wherein each of the indexes m and n is independently the same or different and is a number with a value from 0 to 3, and
wherein alkyl with 1 to 20 carbon atoms and alkenyl with 2 to 20 carbon atoms are each independently straight-chain or branched and both unsubstituted or with at least one radical selected from the group consisting of halogen, hydroxyl, thiol, nitro, carboxyl , Amino (-NH ₂ ), alkylamino with 1 to 4 carbon atoms, dialkylamino with 2 to 8 carbon atoms, trialkylamino with 3 to 12 carbon atoms, guanidino, alkanoyloxy with 1 to 6 carbon atoms, aldehyde with 1 to 10 C atoms, ketone with 2 to 10 C atoms, O-alkyl with 1 to 10 C atoms, S-alkyl with 1 to 10 C atoms, O-alkenyl with 2 to 10 C-atoms, S-alkenyl with 2 to 10 C-atoms, O-aryl with 5 to 20 C-atoms, S-aryl with 5 to 20 C-atoms, ether with 2 to 10 C-atoms, thioether with 2 to 10 carbon atoms, carboxylic acid esters with 2 to 10 carbon atoms, carboxylic acid amide with 1 to 10 carbon atoms, thioesters with 2 to 10 carbon atoms, cycloalkyl with 3 to 20 carbon atoms, cycloalkenyl with 3 to 20 carbon atoms, Aryl having 5 to 20 carbon atoms or heteroaryl having 4 to 20 carbon atoms, is selected, can be substituted, and
wherein cycloalkyl with 3 to 20 C atoms and cycloalkenyl with 3 to 20 C atoms are each independently unsubstituted or with at least one radical selected from the group consisting of halogen, hydroxyl, thiol, nitro, carboxyl, amino (-NH ₂ ), Alkylamino with 1 to 4 carbon atoms, dialkylamino with 2 to 8 carbon atoms, trialkylamino with 3 to 12 carbon atoms, guanidino, alkanoyloxy with 1 to 6 carbon atoms, aldehyde with 1 to 10 carbon atoms, ketone with 2 to 10 carbon atoms, O-alkyl with 1 to 10 carbon atoms, S-alkyl with 1 to 10 carbon atoms, O-alkenyl with 2 to 10 carbon atoms, S-alkenyl with 2 to 10 carbon atoms Atoms, O-aryl with 5 to 20 C atoms, S-aryl with 5 to 20 C atoms, ether with 2 to 10 C atoms, thioether with 2 to 10 C atoms, carboxylic acid esters with 2 to 10 C atoms , Carboxamide with 1 to 10 carbon atoms, thioesters with 2 to 10 carbon atoms, alkyl with 1 to 10 carbon atoms, alkenyl with 2 to 20 carbon atoms, aryl with 5 to 20 carbon atoms or heteroaryl with 4 to 20 carbon atoms, is selected, can be substituted, and
wherein aryl with 5 to 20 C atoms and heteroaryl with 4 to 20 C atoms are each independently unsubstituted or with at least one radical selected from the group consisting of halogen, hydroxyl, thiol, nitro, carboxyl, amino (-NH ₂ ), Alkylamino with 1 to 4 carbon atoms, dialkylamino with 2 to 8 carbon atoms, trialkylamino with 3 to 12 carbon atoms, guanidino, alkanoyloxy with 1 to 6 carbon atoms, aldehyde with 1 to 10 carbon atoms, ketone with 2 to 10 carbon atoms, O-alkyl with 1 to 10 carbon atoms, S-alkyl with 1 to 10 carbon atoms, O-alkenyl with 2 to 10 carbon atoms, S-alkenyl with 2 to 10 carbon atoms Atoms, O-aryl with 5 to 20 C atoms, S-aryl with 5 to 20 C atoms, ether with 2 to 10 C atoms, thioether with 2 to 10 C atoms, carboxylic acid esters with 2 to 10 C atoms , Carboxamide with 1 to 10 carbon atoms, thioesters with 2 to 10 carbon atoms, alkyl with 1 to 10 carbon atoms, alkenyl with 2 to 20 carbon atoms, cycloalkyl with 3 to 20 carbon atoms, cycloalkenyl with 3 to 20 carbon atoms, is selected, can be substituted, and
wherein at least one carbon atom in the chain of alkyl and alkenyl and in the ring of cycloalkyl, cycloalkenyl and aryl can be substituted by at least one heteroatom which can be selected from the group which is preferably composed of sulfur atom, nitrogen atom, oxygen atom.

The compounds with the formula (V) to (VI) are ionic compounds. In the compounds of the formula (V), the thiosulfate ion is a double negatively charged anion. The doubly present positively charged ammonium ion neutralizes the negative charges of the thiosulfate anion.

In the compounds of the formula (VI), the thiosulfate ion is a double negatively charged anion. The negative charges of the thiosulfate anion are neutralized by a single positively charged ammonium cation and either a proton or a positively charged alkali metal ion selected from the group consisting of lithium, sodium, potassium, rubidium and cesium.

The compounds having the formulas (VII) to (VIII) are ionic compounds, provided that the cation is an alkali metal cation selected from the group consisting of lithium, sodium, potassium, rubidium and cesium. If the negative charges of the thiosulfate anion of the compounds of the formula (VII) to (VIII) are balanced by a proton, they are neutral organic compounds.

The compounds of the formulas (V) to (VIII) can have chiral centers in the R or S configuration. Compounds suitable according to the invention relate to both the optically pure compounds and stereoisomer mixtures, such as enantiomer mixtures and diasteromer mixtures, in any ratio.

In a preferred embodiment of one of the invention, ie the method according to the invention or the colorant preparation according to the invention, the at least one organic thiosulfate compound is selected from the group consisting of compounds having the formulas (V) to (VIII) and mixtures thereof: (NR ¹ R ² R ³ R ⁴ ) ₂ S ₂ O ₃ (V), (NR ¹ R ² R ³ R ⁴ ) S ₂ O ₃ X (VI), R ⁵ -S ₂ O ₃ X (VII), XO ₃ S ₂ - (CH ₂ ) _m -R ⁶ -R ⁷ -R ⁸ - (CH ₂ ) _n -S ₂ O ₃ X (VIII),
wherein each of the radicals R ¹ , R ² , R ³ and R ⁴ each independently of one another is the same or different and is an organic radical which is selected from the group consisting of alkyl having 1 to 15 carbon atoms, preferably having 2 to 10 carbon atoms Atoms, preferably with 2 to 6 carbon atoms, preferably with 3 to 4 carbon atoms, more preferably from methyl, ethyl, propyl, isopropyl, butyl, tert-butyl, and alkylaryl with 7 to 10 carbon atoms, preferably with 8 to 9 carbon atoms, preferably consisting of benzyl, is selected, where the alkyl radical is straight-chain or branched, where R ¹ to R ^{3 can} also independently of one another stand for hydrogen, and
where X = H, Li, Na, K, Rb and / or Cs, and
where R ^{5 is} an organic radical selected from the group consisting of unsubstituted or substituted alkyl, which is straight-chain or branched, having 1 to 15 C atoms, preferably having 2 to 10 C atoms, preferably having 2 to 6 C atoms Atoms or preferably with 3 to 4 carbon atoms, unsubstituted or substituted alkenyl which is straight-chain or branched, with 2 to 15 carbon atoms, preferably with 3 to 10 carbon atoms, preferably with 4 to 6 carbon atoms or preferably with 2 to 4 carbon atoms, unsubstituted or substituted cycloalkyl having 3 to 16 carbon atoms, preferably having 4 to 10 carbon atoms, preferably having 5 to 7 carbon atoms, unsubstituted or substituted cycloalkenyl having 3 to 16 carbon atoms, preferably with 4 to 10 carbon atoms, preferably with 5 to 7 carbon atoms, unsubstituted or substituted aryl with 5 to 20 carbon atoms, preferably with 6 to 16 carbon atoms, preferably with 7 to 10 carbon atoms or 5 to 6 C atoms, and unsubstituted or substituted heteroaryl with 4 to 2 0 C atoms, preferably having 5 to 16 C atoms, preferably having 6 to 10 C atoms or 4 to 6 C atoms, is selected, and
wherein R ⁶ , R ⁷ and R ^{8 are} each independently the same or different and is an organic radical selected from the group consisting of unsubstituted or substituted alkyl, which is straight-chain or branched, having 1 to 15 carbon atoms, preferably having 2 up to 10 C atoms, preferably with 2 to 6 C atoms or preferably with 3 to 4 C atoms, unsubstituted or substituted alkenyl which is straight-chain or branched, with 2 to 15 C atoms, preferably with 3 to 10 C atoms Atoms, preferably with 4 to 6 C atoms or preferably with 2 to 4 C atoms, unsubstituted or substituted cycloalkyl with 3 to 16 C atoms, preferably with 4 to 10 C atoms, preferably with 5 to 7 C atoms, unsubstituted or substituted cycloalkenyl having 3 to 16 carbon atoms, preferably having 4 to 10 carbon atoms, preferably having 5 to 7 carbon atoms, unsubstituted or substituted aryl having 5 to 20 carbon atoms, preferably having 6 to 16 carbon atoms , preferably with 7 to 10 carbon atoms or preferred as with 5 to 6 carbon atoms, and unsubstituted or substituted heteroaryl with 4 to 20 carbon atoms, preferably with 5 to 16 carbon atoms, preferably with 6 to 10 carbon atoms or preferably with 4 to 6 carbon atoms , is selected, and
wherein each of the indices m and n is independently the same or different and is a number with a value from 0 to 3, preferably with a value from 0 to 2, preferably with a value from 1 to 3, preferably with a value of 2 to 3, preferably with a value of 1 to 2, preferably with a value of 0 to 1, and
where alkyl having 1 to 15 carbon atoms, preferably having 2 to 10 carbon atoms, preferably having 2 to 6 carbon atoms or preferably having 3 to 4 carbon atoms, and alkenyl having 2 to 15 carbon atoms, preferably having 3 up to 10 C atoms, preferably with 4 to 6 C atoms or preferably with 2 to 4 C atoms, each independently of one another straight-chain or branched and both unsubstituted or with at least one radical selected from the group consisting of halogen, hydroxyl , Thiol, nitro, carboxyl, amino (-NH ₂ ), alkylamino with 1 to 2 carbon atoms, dialkylamino with 2 to 6 carbon atoms, preferably with 3 to 4 carbon atoms, trialkylamino with 3 to 9 carbon atoms, preferably with 4 to 6 carbon atoms, guanidino, alkanoyloxy with 1 to 4 carbon atoms, aldehyde with 1 to 6 carbon atoms, preferably with 2 to 4 carbon atoms Atoms, ketone with 2 to 6 carbon atoms, preferably with 3 to 4 carbon atoms, O-alkyl with 1 to 6 carbon atoms, preferably with 2 to 4 carbon atoms, S-alkyl with 1 to 6 carbon atoms , preferably with 2 to 4 carbon atoms, O-alkenyl with 2 to 7 carbon atoms, preferably with 3 to 4 carbon atoms, S-alkenyl with 2 to 7 carbon atoms, preferably with 3 to 4 carbon atoms, O-aryl with 5 to 15 C atoms, preferably with 6 to 10 C atoms, S-aryl with 5 to 15 C atoms, preferably with 6 to 10 C atoms, ether with 2 to 8 C atoms, preferably with 3 to 6 carbon atoms, thioethers with 2 to 8 carbon atoms, preferably with 3 to 6 carbon atoms, carboxylic acid esters with 2 to 7 carbon atoms, preferably with 3 to 4 carbon atoms, carboxamide with 1 to 7 carbon atoms Atoms, preferably with 2 to 4 carbon atoms, thioesters with 1 to 7 carbon atoms, preferably with 2 to 4 carbon atoms, cycloalkyl with 3 to 16 carbon atoms, preferably with 4 to 10 carbon atoms, cycloalkenyl with 3 to 16 carbon atoms, preferably with 4 to 10 carbon atoms, aryl with 5 to 16 carbon atoms, preferably with 6 to 10 carbon atoms, or heteroaryl with 4 to 16 carbon atoms, preferably with 5 to 10 carbon atoms, is selected, substituted and
wherein cycloalkyl with 3 to 16 carbon atoms, preferably with 4 to 10 carbon atoms, preferably with 5 to 7 carbon atoms, and cycloalkenyl with 3 to 16 carbon atoms, preferably with 4 to 10 carbon atoms, preferably with 5 to 7 carbon atoms, each independently unsubstituted or with at least one radical from the group consisting of halogen, hydroxyl, thiol, nitro, carboxyl, amino (-NH ₂ ), alkylamino having 1 to 2 carbon atoms, dialkylamino with 2 to 6 carbon atoms, preferably with 3 to 4 carbon atoms, trialkylamino with 3 to 9 carbon atoms, preferably with 4 to 6 carbon atoms, guanidino, alkanoyloxy with 1 to 4 carbon atoms, aldehyde with 1 to 6 carbon atoms, preferably with 2 to 4 carbon atoms, ketone with 2 to 6 carbon atoms, preferably with 3 to 4 carbon atoms, O-alkyl with 1 to 6 carbon atoms, preferably with 2 to 4 carbon atoms Atoms, S-alkyl with 1 to 6 C atoms, preferably with 2 to 4 C atoms, O-alkenyl with 2 to 7 C atoms, preferably with 3 to 4 C atoms, S-alkenyl with 2 to 7 C Atoms, preferably with 3 to 4 carbon atoms, O Aryl with 5 to 15 carbon atoms, preferably with 6 to 10 carbon atoms, S-aryl with 5 to 15 carbon atoms, preferably with 6 to 10 carbon atoms, ether with 2 to 8 carbon atoms, preferably with 3 to 6 carbon atoms, thioethers with 2 to 8 carbon atoms, preferably with 3 to 6 carbon atoms, carboxylic acid esters with 2 to 7 carbon atoms, preferably with 3 to 4 carbon atoms, carboxamide with 1 to 7 carbon atoms Atoms, preferably with 2 to 4 carbon atoms, thioesters with 2 to 7 carbon atoms, preferably with 3 to 4 carbon atoms, alkyl with 1 to 6 carbon atoms, preferably with 2 to 4 carbon atoms, alkenyl with 2 up to 15 carbon atoms, preferably with 3 to 10 carbon atoms, preferably with 2 to 6 carbon atoms, aryl with 5 to 16 carbon atoms, preferably with 6 to 10 carbon atoms, or heteroaryl with 4 to 16 carbon atoms Atoms, preferably having 5 to 10 carbon atoms, is selected, substituted and
where aryl with 5 to 20 carbon atoms, preferably with 6 to 16 carbon atoms, preferably with 7 to 10 carbon atoms or preferably with 5 to 6 carbon atoms, and heteroaryl with 4 to 20 carbon atoms, preferably with 5 to 16 C atoms, preferably with 6 to 10 C atoms or preferably with 4 to 6 C atoms, each independently unsubstituted or with at least one radical selected from the group consisting of halogen, hydroxyl, thiol, nitro, carboxyl , Amino (-NH ₂ ), alkylamino with 1 to 2 carbon atoms, dialkylamino with 2 to 6 carbon atoms, preferably with 3 to 4 carbon atoms, trialkylamino with 3 to 9 carbon atoms, preferably with 4 to 6 carbon atoms Atoms, guanidino, alkanoyloxy with 1 to 4 carbon atoms, aldehyde with 1 to 6 carbon atoms, preferably with 2 to 4 carbon atoms, ketone with 2 to 6 carbon atoms, preferably with 3 to 4 carbon atoms, O-alkyl with 1 to 6 C atoms, preferably with 2 to 4 C atoms, S-alkyl with 1 to 6 C atoms, preferably with 2 to 4 C atoms, O-alkenyl with 2 to 7 C atoms , preferably with 3 to 4 carbon atoms en, S-alkenyl with 2 to 7 C atoms, preferably with 3 to 4 C atoms, O-aryl with 5 to 15 C atoms, preferably with 6 to 10 C atoms, S-aryl with 5 to 15 C -Atoms, preferably with 6 to 10 C atoms, ethers with 2 to 8 C atoms, preferably with 3 to 6 C atoms, thioethers with 2 to 8 C atoms, preferably with 3 to 6 C atoms, carboxylic acid esters with 2 to 7 carbon atoms, preferably with 3 to 4 carbon atoms, carboxamide with 1 to 7 carbon atoms, preferably with 2 to 4 carbon atoms, thioesters with 2 to 7 carbon atoms, preferably with 3 to 4 carbon atoms Atoms, alkyl with 1 to 6 carbon atoms, preferably with 2 to 4 carbon atoms, alkenyl with 2 to 15 carbon atoms, preferably with 3 to 10 carbon atoms, preferably with 4 to 6 carbon atoms, cycloalkyl with 3 up to 16 carbon atoms, preferably with 4 to 10 carbon atoms, cycloalkenyl with 3 to 16 carbon atoms, preferably with 4 to 10 carbon atoms, is selected, substituted and
wherein at least one carbon atom in the chain of alkyl and alkenyl and in the ring of cycloalkyl, cycloalkenyl and aryl can be substituted by at least one heteroatom which can be selected from the group which is preferably composed of sulfur atom, nitrogen atom, oxygen atom.

In a preferred embodiment of one of the abovementioned methods or the colorant preparation according to the invention, a carbon atom in the chain of alkyl and alkenyl and in the ring of cycloalkyl, cycloalkenyl and aryl can be formed by at least one heteroatom which consists of the group consisting of sulfur atom, nitrogen atom and oxygen atom , is selected to be substituted.
In a preferred embodiment of one of the abovementioned methods or the colorant preparation according to the invention, a carbon atom in the chain of alkyl and alkenyl and in the ring of cycloalkyl, cycloalkenyl and aryl can be selected by at least one heteroatom which is selected from the group consisting of nitrogen atom and oxygen atom will be substituted.

In a preferred embodiment of one of the aforementioned processes or the colorant preparation according to the invention, the abovementioned unsubstituted or substituted alkyl of the independently identical or different radicals R ¹ to R ^{8 is selected} from the group consisting preferably of methyl, ethyl, prop-1-yl, Prop-2-yl, but-1-yl, but-2-yl, 2-methylprop-1-yl, 2-methyl-prop-2-yl, pent-1-yl, pent-2-yl, pent 3-yl, 2-methylbut-1-yl, 2-methylbut-2-yl, 2-methylbut-3-yl, 2-methylbut-4-yl, 2,2-dimethylprop-1-yl, hex-1- yl, hex-2-yl, hex-3-yl, 2-methylpent-1-yl, 2-methylpent-2-yl, 2-methylpent-3-yl, 2-methylpent-4-yl, 2-methylpent- 5-yl, 3-methylpent-1-yl, 3-methylpent-2-yl, 3-methylpent-3-yl, 2,2-dimethylbut-1-yl, 2,2-dimethylbut-3-yl, 2, 2-dimethylbut-4-yl, 2,3-dimethylbut-1-yl and 2,3-dimethylbut-2-yl.

In a preferred embodiment of one of the abovementioned processes or the colorant preparation according to the invention, the abovementioned unsubstituted or substituted alkenyl of the radicals R ⁵ to R ⁸ which are each the same or different independently of one another is selected from the group consisting preferably of ethenyl, prop-1-en-1- yl, prop-2-en-1-yl, prop-1-en-2-yl, but-1-en-1-yl, but-2-en-1-yl, but-3-en-1- yl, but-1-en-2-yl, but-2-en-2-yl, but-3-en-2-yl, 2-methylprop-1-en-1-yl, 2-methylprop-2- en-1-yl, pent-1-en-1-yl, pent-1-en-2-yl, pent-1-en-3-yl, pent-1-en-4-yl, pent-1- en-5-yl, pent-2-en-1-yl, pent-2-en-2-yl, pent-2-en-3-yl, pent-2-en-4-yl, pent-3- en-1-yl, pent-4-en-1-yl, pent-2-en-2-yl, pent-3-en-2-yl, pent-4-en-2-yl, 2-methylbutyl 1-en-1-yl, 2-methylbut-1-en-2-yl, 2-methylbut-1-en-3-yl, 2-methylbut-2-en-2-yl, 2-methylbut-2- en-3-yl, 2-methylbut-3-en-2-yl, 2-methylbut-3-en-3-yl, 3-methylbut-1-en-1-yl, 2-methylbut-2-en- 1-yl, 2-methylbut-3-en-1-yl, 3-methylbut-2-en-1-yl, 3-methylbut-3-en-1-yl, Hex-1-en-1-yl, hex-1-en-2-yl, hex-1-en-3-yl, hex-1-en-4-yl, hex-1-en-5-yl, Hex-1-en-6-yl, hex-2-en-1-yl, hex-2-en-2-yl, hex-2-en-3-yl, hex-2-en-4-yl, Hex-2-en-5-yl, hex-2-en-6-yl, hex-3-en-1-yl, hex-3-en-2-yl, hex-3-en-3-yl, Hex-4-en-1-yl, Hex-5-en-1-yl.

In a preferred embodiment of one of the abovementioned processes or the colorant preparation according to the invention, the abovementioned unsubstituted or substituted cycloalkyl of the radicals R ⁵ to R ⁸ which are in each case independently of one another or different from the group which preferably consists of cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl and a decalin residue is selected.

In a preferred embodiment of one of the aforementioned processes or the colorant preparation according to the invention, the aforementioned unsubstituted or substituted cycloalkenyl is the respective independently of one another identical or different radicals R ⁵ to R ^{8 are selected} from the group consisting preferably of cyclopropenyl, cyclobutenyl, cyclopentenyl, cyclohexenyl, cycloheptenyl and cyclooctenyl.

In a preferred embodiment of one of the abovementioned processes or the colorant preparation according to the invention, the abovementioned unsubstituted or substituted aryl of the independently identical or different radicals R ⁵ to R ^{8 is selected} from the group which preferably consists of phenyl, naphthyl, anthryl and phenanthryl .

In a preferred embodiment of one of the abovementioned processes or the colorant preparation according to the invention, the abovementioned alkylamino substituent which may be substituted on the radicals R ⁵ to R ⁸ which are each the same or different independently of one another is selected from the group which preferably consists of methylamino, ethylamino, n -Propylamino, i-propylamino, and n-butylamino is selected.

In a preferred embodiment of one of the abovementioned processes or the colorant preparation according to the invention, the abovementioned dialkylamino substituent which can be substituted on the radicals R ⁵ to R ⁸ which are each the same or different independently of one another is selected from the group which preferably consists of dimethylamino, ethylmethylamino, diethylamino and di-n-propylamino is selected.

In a preferred embodiment of one of the abovementioned processes or the colorant preparation according to the invention, the aforementioned trialkylamino substituent which can be substituted on the independently identical or different radicals R ⁵ to R ^{8 is selected} from the group which preferably consists of trimethylammonio, triethylammonio, methyldiethylammonio , Ethyldimethylammonio and Tri-n-propylammonio is selected.

In a preferred embodiment of one of the abovementioned processes or the colorant preparation according to the invention, the abovementioned alkanoyloxy substituent which may be substituted on the radicals R ⁵ to R ⁸ which are each the same or different independently of one another is selected from the group which preferably consists of formyloxy, acetoxy n- Propanoyloxy and n-butanoyloxy is selected.

In a preferred embodiment of one of the abovementioned processes or the colorant preparation according to the invention, the abovementioned aldehyde substituent which can be substituted on the radicals R ⁵ to R ⁸ which are each the same or different independently of one another is selected from the group which preferably consists of methanal-1-yl (Formyl), ethanal-1-yl (2-oxoethyl), n-propanal-1-yl (3-oxopropyl) and n-butanal-1-yl (4-oxobutyl).

In a preferred embodiment of one of the abovementioned processes or the colorant preparation according to the invention, the abovementioned ketone substituent which may be substituted on the radicals R ⁵ to R ⁸ which are each independently or identical is selected from the group which preferably consists of dimethyl ketyl, methyl ethyl -ketyl, ethyl-methyl-ketyl, diethylketyl, methyl-propyl-ketyl, ethyl-propyl-ketyl, propyl-methyl-ketyl, propyl-ethyl-ketyl and dipropyl-ketyl, in which the ketone can be straight-chain or branched , selected.

In a preferred embodiment of one of the abovementioned processes or the colorant preparation according to the invention, the abovementioned O-alkyl substituent which can be substituted on the radicals R ⁵ to R ⁸ which are each the same or different independently of one another is selected from the group which preferably consists of methoxy, ethoxy , n-propyloxy, i-propyloxy, n-butyloxy and n-pentyloxy is selected.

In a preferred embodiment of one of the abovementioned processes or the colorant preparation according to the invention, the abovementioned S-alkyl substituent which can be substituted on the radicals R ⁵ to R ⁸ which are each the same or different independently of one another is selected from the group which preferably consists of methylsulfanyl and ethylsulfanyl , n-Propylsulfanyl, i-Propylsulfanyl, n-Butylsulfanyl and n-Pentylsulfanyl is selected.

In a preferred embodiment of one of the abovementioned processes or the colorant preparation according to the invention, the abovementioned ether substituent which may be substituted on the radicals R ⁵ to R ⁸ which are each the same or different independently of one another is selected from the group which preferably consists of methoxymethyl, methoxyethyl, methoxy -n-propyl, ethoxymethyl, n-propoxymethyl, 2-ethoxyethoxymethyl, 2- (2-ethoxyethoxy) ethyl, i-propoxymethyl, tert-butyloxymethyl, dioxa-3,6-heptyl and benzyloxymethyl. In a further preferred embodiment, the aforementioned ether residues can be simple ether residues, oligoether residues, polyether residues or mixtures thereof.

In a preferred embodiment of one of the abovementioned processes or the colorant preparation according to the invention, the abovementioned thioether substituent which may be substituted on the radicals R ⁵ to R ⁸ which are each the same or different independently of one another is selected from the group which preferably consists of methylsulfanylmethyl, methylsulfanylethyl, 3rd -Methylsulfanyl-n-propyl, ethylsulfanylmethyl, n-propylsulfanylmethyl, 2-ethylsulfanylethylsulfanylmethyl, 2- (2-ethylsulfanylethylsulfanyl) ethyl, 2-methylsulfanylpropyl, tert-butylsulfanymethyl and benzylsulfanylmethyl. In a further preferred embodiment, the aforementioned thioether residues can be simple thioether residues, oligothioether residues, polythioether residues or mixtures thereof.

In a preferred embodiment of one of the abovementioned processes or the colorant preparation according to the invention, the abovementioned carboxylic acid ester substituent, which may be substituted on the R ⁵ to R ⁸ radicals which are each independently or identical, is selected from the group consisting preferably of methyl ester, ethyl ester, n Propyl ester, i-propyl ester, n-butyl ester, sec-butyl ester, tert-butyl ester, phenyl ester and benzyl ester is selected.

In a preferred embodiment of one of the abovementioned processes or the colorant preparation according to the invention, the abovementioned carboxamide substituent which can be substituted on the radicals R ⁵ to R ⁸ which are each the same or different independently of one another is selected from the group which preferably consists of amide, N-methylamide , N-ethylamide, N- (n-propyl) amide, N- (i-propyl) amide, N- (n-butyl) amide, N- (sec.-butyl) amide, N- (tert.-butyl) amide, N-phenylamide, N-benzylamide, N, N-dimethylamide, N-methyl-N-ethyl-amide, N, N-diethylamide, N-methyl-N- (n-propyl) amide, N-methyl-N - (i-Propyl) amide, N-methyl-N- (n-butyl) amide, N-methyl-N- (sec.-butyl) amide, N-methyl-N- (tert.-butyl) amide, N -Ethyl-N- (n-propyl) amide, N-ethyl-N- (i-propyl) amide, N-ethyl-N- (n-butyl) amide, N-ethyl-N- (sec.-butyl) amide, N-ethyl-N- (tert-butyl) amide, N- (n-propyl) -N- (n-propyl) amide, N- (n-propyl) -N- (i-propyl) amide, N- (n-propyl) -N- (n-butyl) amide, N- (n-propyl) -N- (sec.-butyl) amide, N- (n-propyl) -N- (tert-butyl ) amide, N- (i-propyl) -N- (n-propyl) amide, N- (i-propyl) -N- (i-propyl) amide, N- (i-propyl) -N- (n-butyl) amide, N- (i-propyl) -N- (sec.-butyl) amide, N- (i-propyl) -N- (tert-butyl) amide, N- (n-butyl) -N- (n-propyl) amide, N- (n-butyl) -N- (i- Propyl) amide, N- (n-butyl) -N- (n-butyl) amide, N- (n-butyl) -N- (sec.-butyl) amide, N- (n-butyl) -N- ( tert-butyl) amide, N- (sec.-butyl) -N- (n-propyl) amide, N- (sec.-butyl) -N- (i-propyl) amide, N- (sec.-butyl ) -N- (n-butyl) amide, N- (sec.-butyl) -N- (sec.-butyl) amide, N- (sec.-butyl) -N- (tert.-butyl) amide, N - (tert-Butyl) -N- (n-propyl) amide, N- (tert-butyl) -N- (i-propyl) amide, N- (tert-butyl) -N- (n-butyl ) amide, N- (tert.-butyl) -N- (sec.-butyl) amide, N- (tert.-butyl) -N- (tert.-butyl) amide, N, N-diphenylamide, N, N -Dibenzylamide, N-phenyl-N-benzylamide, N-methyl-N-phenylamide, N-methyl-N-benzylamide, N-ethyl-N-phenylamide, N-ethyl-N-benzylamide, N-phenyl-N- ( n-propyl) amide, N-phenyl-N- (i-propyl) amide, N-phenyl-N- (n-butyl) amide, N-phenyl-N- (sec.-butyl) amide, N-phenyl- N- (tert-butyl) amide, N-benzyl-N- (n-propyl) amide, N-benzyl-N- (i-propyl) amide, N-benzyl-N- (n-butyl) amide, N -Benzy l-N- (sec.-butyl) amide and N-benzyl-N- (tert.-butyl) amide is selected.

In a preferred embodiment of one of the abovementioned processes or the colorant preparation according to the invention, the abovementioned thioester substituent, which may be substituted on the R ⁵ to R ⁸ radicals which are each independently or identical, is selected from the group consisting preferably of methyl thioester, ethyl thioester, n -Propylthioester, i-propylthioester, n-butylthioester, sec.-butylthioester, tert.-butylthioester, phenylthioester and benzylthioester.

• - C.I. Disperse Blue 27 (beispielsweise Teratop Blau GLF (engl. Teratop Blue GLF) von Huntsman Corporation, Salt Lake City, UT, USA);
• - C.I. Disperse Red 54 (beispielsweise Serilen Scharlach G-LS 150% (engl. Serilene Scarlett G-LS 150%) von Yorkshire Group, Hongkong, Sonderverwaltungszone Hongkong);
• - C.I. Disperse Yellow 42 (beispielsweise Dianix Gelb AM-42 (engl. Dianix Yellow AM-42) von DyStar, Leverkusen, Deutschland;

oder Mischungen davon verwendet.In the present invention, organic colorants are extremely preferred

• CI Disperse Blue 27 (for example Teratop Blue GLF from Huntsman Corporation, Salt Lake City, UT, USA);
• CI Disperse Red 54 (for example, Serilene Scarlet G-LS 150% (English Serilene Scarlett G-LS 150%) from Yorkshire Group, Hong Kong, Hong Kong Special Administrative Region);
• CI Disperse Yellow 42 (for example Dianix Yellow AM-42 from DyStar, Leverkusen, Germany;

or mixtures thereof.

According to a preferred variant of the invention, i.e. in the method according to the invention or the colorant preparation according to the invention, the at least one organic thiosulfate compound is a salt of an S-alkylthiosulfate and / or a salt of an S-arylthiosulfate.

The salts of S-alkylthiosulfates and S-arylthiosulfates formed with monovalent metal cations are also referred to as Bunte salts after their discoverer Hans Bunte.

According to a preferred variant of the invention, at least one Bunte salt is used as at least one organic thiosulfate compound. According to the invention, a mixture of colored salts can also be used.

The Bunte salts preferably to be used according to the invention preferably have the general formula (IX): R ^B -S-SO ₃ -M ^B (IX), where R ^{8 is} an organic radical and M ^{B is} a monovalent metal cation. The organic radical R ⁸ can be a substituted or unsubstituted, branched or unbranched aliphatic radical or substituted or unsubstituted, branched or unbranched alkenyl radical having 1 to 20 carbon atoms, preferably having 2 to 10 carbon atoms, or one substituted or unsubstituted aryl radical or alkylaryl radical or arylalkyl radical or alkenylaryl radical or arylalkenyl radical with 5 to 25 carbon atoms, preferably with 7 to 17 carbon atoms, the alkenyl radical, aliphatic or aromatic radical being heteroatoms, preferably N and / or O and / or S, further preferably each have 1 to 5 nitrogen atoms, preferably 2 to 4 nitrogen atoms, and / or 1 to 4 oxygen atoms, preferably 2 to 3 oxygen atoms, and / or 1 to 3 sulfur atoms, preferably 1 or 2 sulfur atoms. The monovalent metal cations M ^B are preferably alkali metal cations, more preferably Li, Na, K, Rb, and / or Cs, more preferably Na and / or K.

According to a further variant of the invention, the Bunte salts to be used preferably have the general formula (IX): R ^B -S-SO ₃ -M ^B (IX), where R ^{8 is} an organic radical and M ^{B is} a monovalent metal cation. The organic radical R ⁸ can be a substituted or unsubstituted, branched or unbranched aliphatic radical or substituted or unsubstituted, branched or unbranched alkenyl radical having 3 to 6 carbon atoms or a substituted or unsubstituted aryl radical or alkylaryl radical or arylalkyl radical or alkenylaryl radical or arylalkenyl radical having 8 to 12 carbon atoms, the alkenyl radical, aliphatic or aromatic radical being heteroatoms, preferably N and / or O and / or S, more preferably in each case 1 to 4 nitrogen atoms, preferably 2 to 3 nitrogen atoms, and / or 1 to 3 May have oxygen atoms, preferably 2 to 3 oxygen atoms, and / or preferably 1 or 2 sulfur atoms. The monovalent metal cations M ^B are preferably alkali metal cations, more preferably Li, Na, K, Rb, and / or Cs, more preferably Na and / or K.

In a preferred variant of the invention, the at least one organic thiosulfate from the group consisting of disodium S, S '- [2- (dimethylamino) trimethylene] -di (thiosulfate), S- {2 - [(9-hydroxynonyl) aminoethyl ] hydrogen thiosulfate}, S- (3-aminopropyl) hydrogen thiosulfate, benzyltrimethylammonium thiosulfate and mixtures thereof.
In a further preferred variant of the invention, the at least one organic thiosulfate from the group consisting of sodium S- (2-methoxy-4-nitrophenyl) thiosulfate, sodium S- (4-methyl-2-nitrophenyl) thiosulfate, sodium S- (4-amino-3-nitrophenyl) thiosulfate, sodium S- (4-amino-3-methoxyphenyl) thiosulfate, sodium S- (3,4-dimethoxyphenyl) thiosulfate, sodium S- (4-acetamido-3-methoxyphenyl) thiosulfate , Sodium S- (3-carboxy-4-nitrophenyl) thiosulfate, sodium S- (2-aminobenzo [d] thiazol-6-yl) thiosulfate, sodium S- (2,4-diamino-6-chloropyrimidin-5-yl ) thiosulfate, sodium S- (2-amino-4,6-dimethoxypyrimidin-5-yl) thiosulfate, sodium S- (2,4-diamino-6-hydroxypyrimidin-5-yl) thiosulfate, sodium S- (4,6 -Dimethylpyrimidin-2-yl) thiosulfate, and mixtures thereof, is selected.

In a further preferred variant of the invention, the at least one organic thiosulfate from the group consisting of sodium ethyl thiosulfate, sodium S- [2- (O-4-nitrophenyl) sulfonatethyl] thiosulfate, potassium trans-S- (3-phenyl-1- propen-3-one) thiosulfate, potassium cis-S- (3-phenyl-1-propen-3-one) thiosulfate, sodium S- (3-chloro-2-hydroxylpropyl) thiosulfate, lithium S- (4-methoxyphenyl) thiosulfate, and mixtures thereof.

It has been found that by adding at least one inorganic and / or organic thiosulfate compound to a colorant preparation, preferably a colorant bath, comprising at least one organic colorant, surprisingly a longer shelf life and useful life of the colorant preparation, in particular the colorant bath, is achieved. The present invention is therefore of great advantage for e.g. automated dyeing processes in which a long service life is essential. The present invention therefore makes it possible to provide automated, in particular fully automated, dyeing processes and dyeing devices for dyeing spectacle lenses.

The invention thus enables the production of colored glasses with a constant degree of coloring over a long period of time. On the one hand, the costs can advantageously be reduced by a longer use of the colorant preparation according to the invention, in particular in a colorant bath, and on the other hand colored glasses with a constant degree of coloring and / or essentially constant color location can be produced during the prolonged use of the colorant preparation, in particular the colorant bath.

The protection of the at least one organic colorant is brought about by the reductive potential of the at least one inorganic and / or organic thiosulfate compound. This prevents an oxidative change or damage to the at least one organic colorant and any color change or destruction of the at least one organic colorant.

In a preferred variant of the method according to the invention for coloring an eyeglass lens with at least one colorant preparation, the eyeglass lens with the at least one colorant preparation widens further at a temperature from a range from 50 ° C. to 120 ° C., further preferably from 70 ° C. to 110 ° C. preferably from 80 ° C to 100 ° C, more preferably from 90 ° C to 99 ° C, more preferably from 91 ° C to 98 ° C.

In a preferred variant of the method according to the invention for coloring an eyeglass lens with at least one colorant preparation, the eyeglass lens with the at least one colorant preparation becomes wider at a pH from a range from pH 5.5 to 9, more preferably from pH 6 to 8.5 preferably from pH 6.2 to 8.0, more preferably from pH 6.4 to 7.8, more preferably from pH 6.5 to 7.5, more preferably from pH 6.6 to 7.2 .

Another particular advantage of using at least one inorganic thiosulfate compound is its ability to neutralize protons in aqueous solutions, as illustrated in Reaction Scheme I below, which can prevent a decrease in pH: S ₂ O ₃ ^2- + 2 H ₃ O ⁺ → 1/8 S ₈ + SO ₂ + 3 H ₂ O (Reaction Scheme I)

In a preferred variant of the methods according to the invention or of the colorant preparation according to the invention, at least one inorganic thiosulfate compound is preferably used.

In a further preferred variant of the methods according to the invention or of the colorant preparation according to the invention, at least one inorganic thiosulfate compound is preferably used in combination with at least one organic thiosulfate compound.

In this variant of the invention, the pH of the colorant preparation according to the invention, preferably in a colorant bath, can be buffered or stabilized via the at least one inorganic thiosulfate compound. With regard to the stabilization of the pH in the colorant preparation, in particular a colorant bath, there is continuous consumption of the at least one inorganic thiosulfate compound with elimination of SO ₂ , as illustrated above. The at least one organic colorant, in particular the at least one organic colorant, can then be reliably protected in the colorant preparation according to the invention by the at least one organic thiosulfate compound.

Accordingly, according to the present invention, a combination of at least one inorganic thiosulfate compound and at least one organic thiosulfate compound is extremely preferred in the processes according to the invention and in the colorant preparation according to the invention.

The use of at least one inorganic thiosulfate compound at the same time enables protection of the at least one organic dye against redox influences, in particular against oxidation, and buffering or stabilization of the pH in the dye preparation, in particular a dye bath.

In a preferred embodiment of the method according to the invention for coloring an eyeglass lens, the eyeglass lens is brought into contact with the colorant preparation according to the invention, in particular a colorant bath according to the invention, preferably immersed in the colorant preparation or in the colorant bath.

In a preferred variant of the method according to the invention for coloring an eyeglass lens, the eyeglass lens is, depending on the desired absorption, for a duration of 1 minute to 5 hours, preferably 2 minutes to 3 hours, preferably 3 minutes to 2 hours, preferably 4 minutes to 1 Hour, preferably from 5 minutes to 30 minutes, in contact with the colorant preparation according to the invention, in particular a colorant bath.

In the present invention, the glasses are preferably organic glasses or glasses comprising organic glasses. According to a variant of the invention, the glasses are not mineral glasses.

The present invention further relates to the provision of an organic spectacle lens colored with at least one organic dye, the colored spectacle lens having at least one inorganic and / or organic thiosulfate compound. In particular, the invention relates to an eyeglass lens obtainable by the method according to the invention.

Due to the production process, the spectacle lens according to the invention has a residue of at least one inorganic and / or organic thiosulfate compound. According to a preferred variant of the invention, the colored spectacle lens is a spectacle lens for sunglasses. The coloring can be a dark coloring, for example with a brown tone, green tone or gray tone. Additionally or alternatively, the spectacle lens can also have at least one UV absorber, i.e. contain at least one organic dye with UV absorption properties.

The examples below are for further illustration only. The invention is by no means limited to the examples.

Examples

Example 1: Colorant preparation containing thiosulfate according to the invention Teratop Blue GLF: 8.00 g Serilene Scarlett G-LS 150%: 1.30 g Dianix Yellow AM-42: 1.50 g Sodium ethyl thiosulfate: 30.00 g Genapol LRO paste (sodium lauryl diglycol ether sulfate) 106.00 g Benzyl alcohol: 60.00 ml Water: 6000.00 ml

Comparative Example 1: Colorant Preparation Without Thiosulfate Teratop Blue GLF: 8.00 g Serilene Scarlett G-LS 150%: 1.30 g Dianix Yellow AM-42: 1.50 g Genapol LRO paste (sodium lauryl diglycol ether sulfate) 106.00 g Benzyl alcohol: 60.00 ml Water: 6000.00 ml

The colorant preparation according to Example 1 according to the invention or according to Comparative Example 1 was placed in a rectangular colorant bath made of stainless steel with the dimensions 14 cm × 29 cm × 16 cm and heated to a temperature of 95 ° C. Spectacle blanks made of MR 8 with a diameter of 75 mm and a maximum thickness of 2.5 mm were immersed in the colorant bath for 10 minutes. The colorant bath was stirred using a magnetic stirrer and cross-shaped magnetic stirrer (height: 15 mm, diameter: 50 mm) at approx. 100 rpm.

Results

It was shown that when using thiosulfate, the useful life of the colorant bath could be extended from 3 days (without thiosulfate) to 20 days (with thiosulfate).

In contrast to the colorant preparation according to Comparative Example 1, the colorant preparation according to the invention had a constant colorant concentration of unoxidized organic dye over the entire useful life. The colorant preparation according to the invention therefore allowed a constant coloring of MR8 spectacle lens blanks over the entire useful life of 20 days. Due to the constant color concentration of the individual dyes, i.e. Teratop Blue GLF, Serilene Scarlett G-LS and Duianix Yellow AM-42, in non-oxidized form, do not change the color location of the colorant preparation. The colored MR8 lens blanks therefore have the same color location.

In the comparative example, after a period of use of 3 days, it was no longer possible to obtain a constant degree of coloration in the MR8 eyeglass lens blanks. This could only be achieved by extending the inking time.

Due to the change in the proportions of the individual colorants due to oxidation processes, however, the color location was shifted after three days. After staining in the colorant bath, the eyeglass lens blanks showed an incipient and continuing shift in the color location after a period of use of three days.

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for better information for the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• EP 1856562 B1 [0005]

Non-patent literature cited

• DIN EN ISO 18451-1: 2017-12 [0025]
• DIN EN ISO 13666: 2013-10 [0031, 0032, 0037]

Claims (15)

Process for protecting at least one organic colorant against oxidation and / or reduction in a colorant preparation, characterized in that at least one inorganic and / or organic thiosulfate compound is added to the colorant preparation. Method for coloring an eyeglass lens with a colorant preparation, characterized in that the method comprises the following step: bringing the eyeglass lens into contact with a colorant preparation while coloring the eyeglass lens, the colorant preparation comprising water and / or at least one organic solvent, at least one organic colorant and at least one inorganic and / or organic thiosulfate compound. Procedure according to one of the Claims 1 or 2nd , characterized in that the at least one organic colorant is dissolved and / or dispersed in water and / or organic solvent. Procedure according to one of the Claims 1 to 3rd , characterized in that the at least one organic colorant from the group consisting of benzophenones, benzotriazoles, triazines, diphenylacrylates, anthraquinones, phenylamines, methines, quinophthalones, azo dyes, spirooxazines, phthalocyanines, chromenes, pyrans, fulgides, spironaphthoxazines, spiropyrans, naphthyrenes, naphthyrenes Triarylmethanes, stilbenes, azastilbenes, nitrones, spirooxazines, quinones and mixtures thereof is selected. Procedure according to one of the Claims 1 to 4th , characterized in that the at least one inorganic and / or organic thiosulfate compound is added to the colorant preparation in an amount from a range from 0.001% by weight to 5% by weight, based on the total weight of the colorant preparation. Procedure according to one of the Claims 1 to 5 , characterized in that the at least one inorganic and / or organic thiosulfate compound is an inorganic thiosulfate compound, preferably from the group consisting of ammonium thiosulfate and compounds having the formulas (I) to (IV) M ^I ₂ S ₂ O ₃ (I), M ^II S ₂ O ₃ (II), M ^I ₃ [Ag (S ₂ O ₃ ) ₂ ] (III), M ^I ₃ [Au (S ₂ O ₃ ) ₂ ] (IV), and mixtures thereof, is selected, where M ^I for a single charged cation, preferably for Li, Na, K, Rb and / or Cs, and M ^II for a double charged cation, preferably for Mg, Ca, Sr, Ba, Zn and / or Fe. Procedure according to one of the Claims 1 to 5 , characterized in that the at least one inorganic and / or organic thiosulfate compound is an organic thiosulfate compound, preferably from the group consisting of compounds of the formulas (V) to (VIII) (NR ¹ R ² R ³ R ⁴ ) ₂ S ₂ O ₃ (V), (NR ¹ R ² R ³ R ⁴ ) S ₂ O ₃ X (VI), R ⁵ -S ₂ O ₃ X (VII), XO ₃ S ₂ - (CH ₂ ) _m -R ⁶ -R ⁷ -R ⁸ - (CH ₂ ) _n -S ₂ O ₃ X (VIII), and mixtures thereof, is selected, wherein R ¹ , R ² , R ³ and R ^{4 are} each independently the same or different and is an organic radical which is selected from the group consisting of alkyl having 1 to 20 carbon atoms and alkylaryl having 7 to 20 C atoms is selected, means, where the alkyl radical is either straight-chain or branched, where R ¹ to R ^{3 can} also independently represent hydrogen, and where X = H, Li, Na, K, Rb or Cs , and wherein R ^{5 is} an organic radical which is selected from the group consisting of unsubstituted or substituted alkyl which is straight-chain or branched, having 1 to 20 C atoms, unsubstituted or substituted alkenyl which is straight-chain or branched, having 2 to 20 C. -Atoms, unsubstituted or substituted cycloalkyl having 3 to 20 carbon atoms, unsubstituted or substituted cycloalkenyl having 3 to 20 carbon atoms, unsubstituted or substituted aryl having 5 to 20 carbon atoms and unsubstituted or substituted heteroaryl having 4 to 20 carbon atoms , is selected, and wherein R ⁶ , R ⁷ and R ^{8 are} each independently the same or different and is an organic radical selected from the group consisting of unsubstituted or substituted alkyl which is straight-chain or branched, with 1 to 20 C atoms, unsubstituted or substituted alkenyl, which is straight-chain or branched, with 2 to 20 C atoms, unsubstituted or substituted cycloalkyl with 3 to 20 C atoms en, unsubstituted or substituted cycloalkenyl with 3 to 20 C atoms, unsubstituted or substituted aryl with 5 to 20 C atoms and unsubstituted or substituted heteroaryl with 4 to 20 C atoms, is selected, and each of the indices m and n is in each case independently of one another identical or different and is a number with a value from 0 to 3, and wherein alkyl with 1 to 20 C atoms and alkenyl with 2 to 20 C atoms are each independently straight-chain or branched and both unsubstituted or with at least one radical selected from the group consisting of halogen, hydroxyl, thiol, nitro, carboxyl, amino (-NH ₂ ), alkylamino with 1 to 4 carbon atoms, dialkylamino with 2 to 8 carbon atoms, trialkylamino with 3 to 12 carbon atoms, guanidino, alkanoyloxy with 1 to 6 carbon atoms, aldehyde with 1 to 10 carbon atoms, ketone with 2 to 10 carbon atoms, O-alkyl with 1 to 10 carbon atoms, S-alkyl with 1 to 10 carbon atoms, O-alkenyl with 2 to 10 carbon atoms, S-alkenyl with 2 to 10 carbon atoms , O-aryl with 5 to 20 C atoms, S-aryl with 5 to 20 C atoms, ether with 2 to 10 C atoms, thioether with 2 to 10 C atoms, carboxylic acid esters with 2 to 10 C atoms, Carboxamide with 1 to 10 carbon atoms, thioesters with 2 to 10 carbon atoms, cycloalkyl with 3 to 20 carbon atoms, cycloalkenyl with 3 to 20 carbon atoms, aryl with 5 to 20 carbon atoms or heteroaryl with 4 to 20 C atoms is selected, may be substituted, and wherein cycloalkyl having 3 to 20 C atoms and cycloalkenyl having 3 to 20 C atoms are each independently unsubstituted or with at least one radical selected from the group consisting of halogen, Hydroxyl, thiol, nitro, carboxyl, amino (-NH ₂ ), alkylamino with 1 to 4 carbon atoms, dialkylamino with 2 to 8 carbon atoms, trialkylamino with 3 to 12 carbon atoms, guanidino, alkanoyloxy with 1 to 6 carbon atoms -Atoms, aldehyde with 1 to 10 C atoms, ketone with 2 to 10 C atoms, O-alkyl with 1 to 10 C atoms, S-alkyl with 1 to 10 C atoms, O-alkenyl with 2 to 10 C atoms, S-alkenyl with 2 to 10 C atoms, O aryl with 5 to 20 C atoms, S aryl with 5 to 20 C atoms, ether with 2 to 10 C atoms, thioether with 2 to 10 C atoms, carboxylic acid esters with 2 to 10 C -Atoms, carboxamide with 1 to 10 carbon atoms, thioesters with 2 to 10 carbon atoms, alkyl with 1 to 10 carbon atoms, alkenyl with 2 to 20 carbon atoms, aryl with 5 to 20 carbon atoms or heteroaryl 4 to 20 carbon atoms, is selected, can be substituted, and wherein aryl with 5 to 20 carbon atoms and heteroaryl with 4 to 20 carbon atoms are each independently unsubstituted or with at least one radical selected from the group consisting of from halogen, hydroxyl, thiol, nitro, carboxyl, amino (-NH ₂ ), alkylamino with 1 to 4 carbon atoms, dialkylamino with 2 to 8 carbon atoms, trialkylamino with 3 to 12 carbon atoms, guanidino, alkanoyloxy with 1 to 6 carbon atoms, aldehyde with 1 to 10 carbon atoms, ketone with 2 to 10 carbon atoms, O-alkyl with 1 to 10 carbon atoms, S-alkyl with 1 to 10 carbon atoms, O-alkenyl with 2 to 10 carbon atoms, S-alkenyl with 2 to 10 carbon atoms, O-aryl with 5 to 20 C atoms, S-aryl with 5 to 20 C atoms, ether with 2 to 10 C atoms, thioether with 2 to 10 C atoms, carboxylic acid ester with 2 to 10 C atoms, carboxamide with 1 to 10 C atoms, thioesters with 2 to 10 C atoms, alkyl with 1 to 10 C atoms, alkenyl with 2 to 20 C atoms, cycloalkyl with 3 to 20 C atoms, cycloalkenyl with 3 to 20 C -Atoms is selected, may be substituted, and wherein at least one carbon atom in the chain of alkyl and alkenyl and in the ring of cycloalkyl, cycloalkenyl and aryl by at least one heteroatom, which is selected from the group consisting preferably of sulfur atom, nitrogen atom, oxygen atom exists, is selected, may be substituted. Procedure according to one of the Claims 1 to 5 , characterized in that at least one Bunte salt is used as at least one organic thiosulfate compound. Procedure according to one of the Claims 2 to 8th , characterized in that the spectacle lens is brought into contact with at least one colorant preparation at a temperature in a range from 50 ° C to 120 ° C. Procedure according to one of the Claims 2 to 9 , characterized in that the spectacle lens is brought into contact with at least one colorant preparation at a pH from a range from pH 5.5 to 9. Procedure according to one of the Claims 2 to 10th , characterized in that the at least one colorant preparation is at least one colorant bath and that the spectacle lens is preferably immersed in the at least one colorant bath. Use of at least one inorganic and / or organic thiosulfate compound in a colorant preparation comprising at least one organic colorant, preferably for coloring eyeglass lenses. Colorant preparation containing at least one organic colorant, characterized in that the colorant preparation contains at least one inorganic and / or organic thiosulfate compound. Colorant preparation after Claim 13 , characterized in that the colorant preparation contains water and / or at least one organic solvent. Spectacle lens colored with at least one organic colorant, characterized in that the colored spectacle lens is or contains an organic spectacle lens and wherein the colored spectacle lens has at least one inorganic and / or organic thiosulfate compound, the colored spectacle lens preferably using a method according to one of the Claims 2 to 11 is made.