Self-release pigmented in-mold coatings (IMC) for coating substrates

Abstract

The present invention relates to a coloring composition suitable for coating parts in an in-mold coating process, to a method for coating parts, and to the use of said composition for improving the flow behavior of a composition for producing parts. The composition comprises at least one solvent L, at least one fatty acid alkoxylate or fatty alcohol alkoxylate, at least one alkoxylated polysiloxane and at least one tinting base BF.

Description

[0001] The present invention relates to a coloring composition suitable for coating parts in an in-mold coating process, to a method for coating parts, and to improving the flow behavior of a composition for producing a part. Prior art

[0002] Nowadays, various parts with variable layer thickness are mainly produced by injection molding methods. However, certain materials, especially low-density foams, are not suitable for the production of parts because they can show problems with soiling tendency, UV stability and defect-free processing. However, especially in the field of sole production or in the field of furniture industry, there is a continuous need for such parts for the production of footwear or upholstered furniture. One way to give these parts enhanced protection is through coating. On the one hand, the coating must have effective adhesion on the part, but on the other hand must have sufficient flexibility and elasticity to allow the coated part to be used even in areas involving high mechanical stress.

[0003] At present, the parts are usually coated after the part preparation, for example in an overmolding process, or by a subsequent painting process. However, such methods are inefficient because they require further process steps after preparation. In addition, the external release agent used during the preparation of the part and allowing the part to be demoulded from the mold without damage must be removed before further coating, for example with a basecoat and / or a clearcoat, or before bonding with other parts adhesives; this removal requires an expensive and inconvenient cleaning process. In addition, the tools used must also be subjected to continuous cleaning. Other disadvantages associated with the use of external release agents include the frequent lack of compatibility between the release agent and the composition used to prepare the part and / or between the release agent and the mold, which leads to bonding problems. In addition, when an external release agent is used, the cost and complexity of the process increase, and therefore the operating time increases. In addition, the use of external release agents often leads to a shiny surface on the prepared parts, which is particularly undesirable in the footwear industry. Furthermore, especially when foams are used to produce components, irregular surface structures are obtained, especially rough surface structures and in some cases those with exposed fibers or pores, and cannot be completely eliminated by using external release agents or by subsequent coating with coating films, usually surfacer, basecoat and clearcoat.

[0004] It is therefore desirable to apply the material directly during production, so that no separate coating step is required. One possible method that enables a component to be coated during its production is the in-mold method. In this method, molding is carried out on a substrate that has already been inserted into a mold, such as a fabric, paper, wood veneer or a foil with any desired printing or structuring. Here, too, an external mold release agent must be applied in order to ensure that the produced component can be demoulded without damage.

[0005] Furthermore, it is desirable that the material be directly coloured with a specific shade during production, so that no separate painting step is required. It is known practice in the prior art to colour foams in a masterbatch process and / or to cover them with coloured foils using a vacuum process. However, these processes do not allow for high-precision colour shades. Furthermore, in the case of vacuum foil coating, there are also cases of stress whitening, wrinkling and edge masking problems. In the case of foam colouring, there is only a limited choice of colours. Furthermore, the addition of high pigment fractions to the foam in order to obtain particularly intense shades can lead to a loss of foam properties.

[0006] Therefore, an advantage is that the composition not only allows the parts to be colored, stably and flexibly coated, but also causes the demoulding of the prepared parts without damage, thereby avoiding the use of external demoulding agents. The composition should result in a coating with high precision of color tone, color tone stability, color tone intensity and color tone uniformity, and should also be able to achieve a high diversity of color tones. In addition, the coating obtained by the composition should not show an irregular and / or shiny surface. In addition, the coating should result in a better flow behavior of the material used to prepare the parts, so as to thereby allow the defect-free preparation of even complex geometries, such as soles or parts with pillars of several millimeters wide. In addition, it should be possible to re-coat the prepared coated parts with commercially available basecoats and / or clearcoats, and / or to bond them with adhesives without expensive and inconvenient cleaning and / or grinding steps.

[0007] Problems and Solutions

[0008] Therefore, the problem to be solved in the present invention is to provide a coloring coating, which allows demoulding from the tool surface of a common metal without damage when not using an external release agent, while showing high precision, color stability, color intensity and color uniformity of the color tone, ensuring the high diversity of the color tone, and ensuring excellent adhesion on the substrate. In addition, the coating should be able to be re-coated with another coating film, such as a base coat and a clear coat, without the need for subsequent expensive and inconvenient cleaning and / or grinding steps. In particular, even foam or other materials with a porous surface can seamlessly provide a highly elastic, flexible, colored covering, and the covering is UV-resistant. In addition, in order to allow a short operating time, the coloring coating should show a short flash time. In addition, the coloring coating should also improve the flow properties of the composition for preparing a coated molded product, so as to allow the preparation of defect-free parts even with complex geometries.

[0009] Solution to the problem

[0010] It was found that the problems described can be solved by a tinting composition, more particularly a tinted coating composition, comprising:

[0011] (a) at least one solvent L,

[0012] (b) at least one compound of the general formula (I):

[0013] R 1 -(C=O) r -O-(AO) s -R 2 (I)

[0014] in:

[0015] R 1 is a saturated or unsaturated aliphatic hydrocarbon group having 6 to 30 carbon atoms,

[0016] R 2 H, PO(OH) 2 a group, or an optionally partially phosphorylated group of a monosaccharide or disaccharide, or an optionally partially phosphorylated group of a sugar alcohol,

[0017] AO represents one or more oxyalkylene groups selected from ethylene oxide, propylene oxide and butylene oxide,

[0018] r is 0 or 1, s is 0-30;

[0019] (c) optionally, at least one polyether-modified alkyl polysiloxane,

[0020] (d) at least one polysiloxane of the general formula (II):

[0021] R 3 -Si(R 4 ) 2 -[O-Si(R 4 )(R 5 )] a -[O-Si(R 4 ) 2 ] b -O-Si(R 4 ) 2 -R 3 (II)

[0022] in:

[0023] R 3 and R 4 is, in each case independently of one another, methyl or (HO—CH 2 ) 2 -C(CH 2 -CH 3 )-CH 2 -O-(CH 2 ) 3 -* group,

[0024] R5 Methyl,

[0025] a is 0 or 1-10, and

[0026] b is 3-30;

[0027] (e) at least one tinting base BF, and

[0028] (f) Optionally, at least one base material B.

[0029] Furthermore, the problem is solved by a process for producing a coated molding, comprising:

[0030] (A) applying the coloring composition of the present invention onto the surface of a mold to form a coating film,

[0031] (B) flash evaporation of the coating film,

[0032] (C) applying a component-forming composition to the flashed coating film,

[0033] (D) crosslinking the composition and the coating film, and

[0034] (E) The coated part is then removed.

[0035] Finally, the problem is solved by the use of the coloring composition according to the invention for improving the flow behavior of a composition for producing a component.

[0036] The above-described coloring composition is also referred to hereinafter as composition according to the invention and is therefore subject matter of the present invention. Preferred embodiments of the composition according to the invention emerge from the following description and from the dependent claims.

[0037] Due to the short flash and crosslinking times, the coloring composition of the present invention not only allows a short operation time, but also leads to damage-free demoulding of the prepared coated parts. In addition, the coloring composition of the present invention leads to high accuracy of hue, hue stability, hue intensity and hue uniformity, and also ensures a high diversity of hues. In addition, using the coloring composition of the present invention, for example, by applying a composition with different hues, effects such as metallic, pearly, and angular chromaticity can be produced, or a fading effect can be obtained. In addition, the composition has high adhesion to the prepared parts, and allows post-coating with commercially available basecoats and / or clear coatings, and / or adhesive bonding, without the need for expensive and inconvenient cleaning and / or grinding steps. Even without post-coating, the coating obtained by the composition on the parts is highly elastic or flexible, and is also UV-stable, and exhibits a consistent gloss or mattness, thus not only leading to damage-free demoulding of the coated parts, but also leading to effective protection of the prepared coated parts from environmental influences, such as UV radiation, dirt, etc., as early as just after preparation, in other words, without further processing of the parts. Furthermore, even when foams (resulting in parts with highly irregular surfaces) are used in combination with conventional release agent compositions, the resulting coated parts have regular surfaces. Furthermore, parts with complex geometries, such as soles and parts with pillars several millimeters wide, can also be produced without defects, due to the improved flow behavior caused by the composition of the invention. In this way, even complex geometries are completely filled with the composition. Since only a small amount of composition remains in the mold, it is not necessary to clean the mold used before each further application of the composition.

[0038] Detailed Description

[0039] definition:

[0040] First, a number of terms used in the context of the present invention will be explained.

[0041] The term "polyether-modified alkylpolysiloxane" according to the present invention means an alkylpolysiloxane modified with polyether groups at the ends and / or in the main chain. These polyether groups can be bonded directly and / or via an alkyl group to the silicon atoms of the alkylpolysiloxane. The polyether groups are preferably bonded directly to the silicon atoms of the alkylpolysiloxane. Preferred polyether groups present are ethylene oxide, propylene oxide and butylene oxide groups.

[0042] The term "binder" in the sense of the present invention and in accordance with DIN EN ISO 4618 (German version, date: March 2007) preferably refers to those non-volatile components of the composition of the invention which are responsible for film formation, excluding any pigments and fillers included therein; more particularly, to the polymer resin responsible for film formation. The non-volatile components can be determined by the method described in the Examples section.

[0043] The term "poly(meth)acrylate" refers to polyacrylates and polymethacrylates. Thus, the poly(meth)acrylate may consist of acrylates and / or methacrylates and may contain other ethylenically unsaturated monomers, such as styrene or acrylic acid.

[0044] The term "aliphatic group" refers herein to a group of acyclic or cyclic saturated or unsaturated carbon compounds, which group does not contain aromatic structures. However, the aliphatic group may accordingly contain heteroatoms, such as oxygen or nitrogen.

[0045] A component according to the invention is understood to mean a separate part which is combined with other components to form an assembly. Thus, if the component is, for example, part of the body of a motor vehicle, it can be assembled with other body parts to form the body. For example, in the case where the component is a sole, it can be assembled with other parts of a footwear product to form the product. However, in general, independently of the purpose for which the material can be used as a component, the invention generally relates to the preparation of coated components and is therefore not limited to components in the above sense. Therefore, when reference is made hereinafter to the coating of a component, this generally also includes the coating of a material which does not have a "component" function; in other words, such materials are not necessarily used as components for the preparation of an assembly.

[0046] The coated component of the present invention means a component having a coating on the surface. The coating is applied to the component surface by crosslinking the composition of the present invention during the preparation of the component. Therefore, the coating of the component involves a crosslinked composition of the present invention.

[0047] Flashing of the composition of the present invention refers to the active or passive evaporation of the solvent L in the composition, which is usually carried out at a temperature higher than the ambient temperature, such as 40-90°C. Therefore, during flashing, the solvent present in the applied composition undergoes evaporation. During flashing, the composition can flow because it is still a fluid immediately after application and at the beginning of flashing. This is because at least some of the compositions applied by spraying are usually applied in the form of droplets, rather than in a uniform thickness. However, due to the presence of solvent L, the composition is a fluid and can therefore flow to form a uniform, smooth coating film. At the same time, solvent L undergoes continuous evaporation, so the composition layer on the surface produced by the flashing stage is relatively smooth and contains less solvent L than the applied composition. However, after flashing, the layer is not yet in a ready-to-use state. Although it is indeed no longer a fluid, for example, it is still soft or sticky and may have only undergone partial drying. In particular, the layer has not yet been cross-linked.

[0048] Crosslinking refers to the curing of the composition and the component-forming composition of the invention, in other words, the conversion of these compositions into a ready-to-use state, i.e. a state in which the component coated with the composition can be transported, stored and used as intended. Thus, the crosslinked composition and the crosslinked component in particular are no longer soft or sticky, but are adjusted to a solid coating film or solid component, respectively. Even if further exposed to the crosslinking conditions to be described later below, the film or component no longer exhibits any significant changes in its properties such as hardness or adhesion to the substrate.

[0049] The compositions of the invention and compositions for preparing parts are in principle physically and / or chemically cured, depending on the components contained, such as binders and crosslinkers. The compositions are in particular chemically cured. Chemical curing includes thermochemical curing and photochemical curing. The compositions of the invention and compositions for preparing parts - as long as they are thermochemically curable - can be self-crosslinked and / or externally crosslinked. In the context of the present invention, the term "self-crosslinked and / or externally crosslinked" means that the polymers included as binders and possible crosslinkers can thus crosslink with each other. The mechanisms involved and the available binders and crosslinkers (film-forming components) will be described later below.

[0050] In the context of the present invention, the terms "thermochemically curable" and "thermochemically curing" refer to the crosslinking of a composition (forming a cured composition) initiated by a chemical reaction of reactive functional groups, wherein the chemical reaction can be energetically activated by means of thermal energy. Here, different functional groups which are complementary to one another can react with one another (complementary functional groups), and / or the formation of the cured composition is based on the reaction of self-reactive groups, which are functional groups which react with groups of their own type. Examples of suitable complementary reactive functional groups and self-reactive functional groups are known, for example, from German patent application DE 199 30 665 A1, page 7, line 28 to page 9, line 24.

[0051] The crosslinking may be self-crosslinking and / or external crosslinking. For example, when complementary reactive functional groups are already present in an organic polymer used as a binder, such as a polyester, polyurethane or poly(meth)acrylate, the crosslinking involved is self-crosslinking. For example, if a (first) organic polymer or a first compound containing specific functional groups (such as hydroxyl groups) reacts with a conventional crosslinking agent (such as a polyisocyanate and / or a melamine resin), external crosslinking is involved. Therefore, the crosslinking agent contains reactive functional groups complementary to the reactive functional groups present in the (first) organic polymer used as a binder.

[0052] In particular in the case of external crosslinking, the systems envisaged are conventional multi-component systems, in particular two-component systems. In these systems, the components to be crosslinked, for example an organic polymer as binder and a crosslinker, are present separately from one another in at least two components, which are not combined until shortly before application. This form is selected when the components to be crosslinked react effectively with one another even at ambient temperature or at slightly elevated temperatures of, for example, 40 to 90° C. Combinations which may be exemplified are combinations of hydroxy-functional polyesters and / or polyurethanes and / or poly(meth)acrylates with free polyisocyanates as crosslinkers.

[0053] It is also possible that the organic polymer as binder has not only self-crosslinking functional groups but also external crosslinking functional groups and in this case can also be combined with a crosslinking agent.

[0054] In the context of the present invention, "actinically-chemically curable" or the term "actinically-chemically curable" refers to the fact that curing can be carried out by applying actinic radiation, which is electromagnetic radiation such as near infrared (NIR) and UV radiation, especially UV radiation, and particle radiation such as electron beams. Curing by UV radiation is usually initiated by free radical photoinitiators or cationic photoinitiators. Typical actinically curable functional groups are carbon-carbon double bonds, in which case free radical photoinitiators are usually used. Actinic curing is then likewise based on chemical crosslinking.

[0055] In the curing of a composition marked as chemically curable, there is of course always a certain degree of physical curing, which means the intercycling of the polymer chains. Physical curing can even be predominant. However, such a composition is called chemically curable if it contains at least a proportion of chemically curable film-forming components.

[0056] As can be seen from the above, depending on the characteristics of the coating composition and the components it contains, curing occurs via different mechanisms, which of course also requires different curing conditions, in particular different curing temperatures and curing times.

[0057] All temperatures stated in the context of the present invention are to be understood as the temperature of the mould in which the composition is located. This does not therefore mean that the composition itself must have a corresponding temperature.

[0058] The measurement methods used to determine certain characteristic variables in the context of the present invention can be found in the Examples section. Unless otherwise explicitly stated, these measurement methods will be used to determine the corresponding characteristic variables. In the context of the present invention, when an official standard is mentioned without indicating any official validity period, it implicitly refers to the standard version valid on the application date, or, if no valid version exists at that point in time, to the last valid version.

[0059] The composition of the present invention:

[0060] The composition of the present invention is preferably a self-release coating composition.

[0061] The composition of the invention preferably has a solid content of 30-60% by weight, more preferably 35-55% by weight, very preferably 40-50% by weight, more particularly 42-48% by weight, based on the total weight of the composition. The solid content is determined according to ASTM D2369 (2015) at 110° C. for 60 minutes on a 2 g sample of the composition.

[0062] Furthermore, it is preferred according to the invention that the composition has a viscosity of 10-60 seconds, more particularly 20-30 seconds (DIN 4 flow cup), measured according to DIN EN ISO 2431 (March 2012). The establishment of a low viscosity facilitates the application of the composition, thus ensuring sufficient wetting of the mold and uniform coating of the component.

[0063] Solvent L:

[0064] As a first essential ingredient, the composition according to the invention comprises at least one solvent L.

[0065] The composition of the present invention may be a solvent-based composition or an aqueous composition. In the case of a solvent-based composition, an organic solvent is included as a major component. The organic solvent constitutes the volatile component of the composition of the present invention and undergoes complete or partial evaporation upon drying or flash evaporation, respectively. The major component of an aqueous composition is water.

[0066] It is preferred according to the invention that the at least one solvent L is selected from organic solvents, water and mixtures thereof and is present in a total amount of 40 to 70% by weight, more preferably 45 to 65% by weight, very preferably 50 to 60% by weight and in particular 52 to 58% by weight, in each case based on the total weight of the composition.

[0067] Preferred organic solvents in the context of the present invention are aprotic. Particularly preferably, they are polar aprotic organic solvents. Very particularly preferably, the organic solvent is chemically inert with respect to the remaining constituents of the composition.

[0068] Preferred organic solvents in the context of the present invention are, for example, ketones, such as acetone, methyl ethyl ketone, cyclohexanone, methyl isobutyl ketone, methyl isoamyl ketone or diisobutyl ketone; esters, such as ethyl acetate, n-butyl acetate, ethylene glycol diacetate, butyrolactone, diethyl carbonate, propylene carbonate, ethylene carbonate, 2-methoxypropyl acetate (MPA) and ethyl ethoxypropionate; amides, such as N,N-dimethylformamide, N,N-dimethylacetamide, N-methylpyrrolidone and N-ethylpyrrolidone; methylal, butyral, 1,3-dioxolane, glycerol formal; and hydrocarbons, which are slightly less preferred due to their nonpolarity, such as benzene, toluene, n-hexane, cyclohexane and solvent naphtha. Particularly preferred solvents belong to the class of esters, with n-butyl acetate and 1-methoxypropyl acetate being very particularly preferred.

[0069] Compound (b) of general formula (I)

[0070] The composition of the present invention further comprises at least one compound of formula (I) as a second essential ingredient:

[0071] R 1 -(C=O) r -O-(AO) s -R 2 (I)

[0072] in:

[0073] R 1 is a saturated or unsaturated aliphatic hydrocarbon group having 6 to 30 carbon atoms, preferably 8 to 26, more preferably 10 to 24, very preferably 12 to 24 carbon atoms,

[0074] R 2 H, PO(OH) 2 a group, or an optionally partially phosphorylated group of a monosaccharide or disaccharide, or an optionally partially phosphorylated group of a sugar alcohol, more particularly an optionally partially phosphorylated group of sorbitol,

[0075] AO represents one or more oxyalkylene groups selected from ethylene oxide, propylene oxide and butylene oxide,

[0076] r is 0 or 1, and

[0077] s is 0-30, preferably 1-25 or 2-25, more preferably 4-22 or 6-20, and very preferably 8-18.

[0078] Group R 1 An acyclic group is preferred.

[0079] The groups AO may be identical or different and may have a random, block or gradient arrangement within the s groups. When two or more different types of AO are contained, preferably the fraction of ethylene oxide is greater than 50 mol %, more preferably at least 70 mol %, very preferably at least 90 mol %, based on the total molar amount of the groups AO. In the above case, the groups other than ethylene oxide are preferably propylene oxide groups.

[0080] When r=0 and s>0, the substance of formula (I) is an alkoxylated fatty alcohol, preferably an ethoxylated fatty alcohol, which is optionally phosphorylated (R 2 =PO(OH) 2 ) or etherified with a monosaccharide or disaccharide or etherified with a sugar alcohol group. When r=1 and s>0, the substance of formula (I) is an alkoxylated fatty acid, preferably an ethoxylated fatty acid, which is optionally phosphorylated (R 2 =PO(OH) 2 ) or etherified by a monosaccharide or disaccharide or by a sugar alcohol group.

[0081] When s=0 and R 2 When it is a monosaccharide or disaccharide group or a sugar alcohol group, the substance of formula (I) is a fatty alcohol ether of a monosaccharide or disaccharide or sugar alcohol (r=0) or a fatty acid ester of a monosaccharide or disaccharide or sugar alcohol (r=1).

[0082] Particularly preferably, for some or all of the substances of formula (I), s is 2-25, better still 6-20, ideally 8-18, and / or for some or all of the substances of formula (I), s is 0 and R 2 is an optionally partially phosphorylated group of a monosaccharide or disaccharide, or an optionally partially phosphorylated group of a sugar alcohol. In this case, R 1 Particularly preferred is a saturated or unsaturated aliphatic hydrocarbon group having 10 to 24 carbon atoms.

[0083] In particular, mixtures of substances of the formula (I) can also be used, where for at least one substance s is 0 and for at least one other substance s>0, preferably 1-25 or 2-25, more preferably 4-22 or 6-20, very preferably 8-18.

[0084] Particularly preferably, in the general formula (I), R 1 is a saturated or unsaturated aliphatic hydrocarbon group having 10 to 24 carbon atoms, R 2 H, PO(OH) 2 A group, or an optionally partially phosphorylated group of a monosaccharide or disaccharide, or an optionally partially phosphorylated group of a sugar alcohol, more particularly an optionally partially phosphorylated group of sorbitol, AO represents one or more alkylene oxide groups selected from ethylene oxide and propylene oxide, r is 0 or 1, and s is 0 or 1-25.

[0085] It is further particularly preferred that, in the general formula (I), R 1 is a saturated or unsaturated aliphatic hydrocarbon group having 10 to 24 carbon atoms, R 2 H, PO(OH) 2 A group, or an optionally partially phosphorylated group of a monosaccharide or an optionally partially phosphorylated group of a sugar alcohol, more particularly an optionally partially phosphorylated group of sorbitol, AO represents one or more oxyalkylene groups selected from ethylene oxide and propylene oxide, and the oxyethylene fraction in the total molar amount of AO groups is at least 70 mol%, r=0 or 1, and s=0 or s=6-20.

[0086] Particularly preferred is a mixture comprising the above alkoxylated fatty alcohols with s>0 and / or the above alkoxylated fatty acids with s>0 and at least one other substance selected from the following group:

[0087] Optionally phosphated or etherified fatty alcohols, wherein r=s=0 and R 2 =H, PO(OH) 2 , a monosaccharide group, a disaccharide group or a sugar alcohol group, and

[0088] Optionally phosphorylated or esterified fatty acid, wherein r=1, s=0, and R 2 =H, PO(OH) 2 , monosaccharide group, disaccharide group or sugar alcohol group.

[0089] The total weight of the compounds of general formula (I) is preferably 0.1-10% by weight, more preferably 0.5-5% by weight, more particularly 1.5-4% by weight, in each case based on the total weight of the composition. When more than one compound of formula (I) is used, the amount of the above numerals is based on the total amount of all compounds falling within the scope of formula (I). If the compound of formula (I) is limited to a specific compound (I-1), the above amount is not based solely on the specific compound (I-1), but on the total amount of the compounds falling within the scope of formula (I). For example, if a specific compound (I-1) is used in an amount of 5% by weight, then there is at most 5% by weight of other compounds falling within the scope of formula (I) in the composition of the present invention.

[0090] Polyether-modified alkyl polysiloxane (c):

[0091] The composition of the invention may further comprise at least one polyether-modified alkylpolysiloxane. The use of such siloxanes leads to a reduction in the dirt absorption of the coated parts.

[0092] Preferably, the polyether-modified alkylpolysiloxane comprises at least one structural unit (R 7 ) 2 (OR 6 )SiO1 / 2 and at least one structural unit (R 7 ) 2 SiO 2 / 2 , where R 6 is ethylene oxide, propylene oxide and butylene oxide, more particularly a mixture of ethylene oxide and propylene oxide and butylene oxide, and R 7 C 1 -C 10 Alkyl, more particularly methyl.

[0093] In this context, preference is given to polyether-modified alkylpolysiloxanes having a molar ratio of siloxane:ethylene oxide:propylene oxide:butylene oxide of from 6:21:15:1 to 67:22:16:1.

[0094] Furthermore, in this context, it is preferred that the polyether-modified alkylpolysiloxane has a structural unit ratio (R 7 ) 2 (OR 6 )SiO 1 / 2 :Structural unit (R 7 ) 2 SiO 2 / 2 Molar ratio. 6 and R 7 With the above definition.

[0095] The composition may contain 0% by weight or 0.1-6% by weight, preferably 0.5-4% by weight, more particularly 0.8-3% by weight of a polyether-modified alkylpolysiloxane, more particularly the specific polyether-modified alkylpolysiloxane described above, in each case based on the total weight of the composition. The absence of this compound leads to a reduction in the viscosity of the composition. As a result, the release of the produced coated part from the mold is improved.

[0096] Polysiloxane (d) of formula (II):

[0097] The composition of the present invention further comprises at least one polysiloxane of the general formula (II):

[0098] R 3 -Si(R 4 ) 2 -[O-Si(R 4 )(R 5 )] a -[O-Si(R 4 ) 2 ] b -O-Si(R 4 ) 2 -R 3 (II)

[0099] in:

[0100] R 3 and R 4 is, in each case independently of one another, methyl or (HO—CH 2 ) 2 -C(CH 2 -CH 3 )-CH 2 -O-(CH 2 ) 3 -* group,

[0101] R 5 Methyl,

[0102] a is 0 or 1-10, and

[0103] b is 3-30.

[0104] Here, (HO-CH 2 ) 2 -C(CH 2 -CH 3 )-CH 2 -O-(CH 2 ) 3 -*bonded to the silicon atom via the symbol *.

[0105] According to the invention, it is preferred to use 3 and R 4 The use of such polysiloxanes has proven to be advantageous in terms of improving demoulding properties without adversely affecting the adhesion of the crosslinking composition of the present invention to the component. Therefore, in a preferred embodiment of the present invention, in the general formula (II), the group R 3 for (HO-CH 2 ) 2 -C(CH 2 -CH 3 )-CH 2 -O-(CH 2 ) 3 -* group, group R 4 is methyl, group R 5 is methyl, a is 0, and b is 7-14.

[0106] According to the invention, it is advantageous that the composition comprises a specific total amount of at least one polysiloxane of formula (II), more particularly the specific polysiloxanes described above. Therefore, it is preferred according to the invention that the composition comprises a total amount of 0.1-5% by weight, preferably 0.5-4% by weight, more particularly 0.8-2.5% by weight of at least one polysiloxane of general formula (II), in each case based on the total weight of the composition. If more than one polysiloxane of formula (II) is used, the amounts of the above figures are based on the total amount of all polysiloxanes falling within the scope of formula (II). If the polysiloxane of general formula (II) is limited to a specific polysiloxane (II-1), the above amounts are not based solely on the specific polysiloxane (II-1), but on the total amount of polysiloxanes falling within the scope of formula (II). For example, when the specific polysiloxane (II-1) is used in an amount of 2% by weight, up to 3% by weight of other polysiloxanes falling within the scope of formula (II) may be present in the composition.

[0107] Tinting base BF(e):

[0108] The composition of the present invention further comprises at least one tinting base BF. Here, tinting base BF means a colorant with a precisely defined hue. By using the at least one tinting base BF, a high precision of the hue is achieved. In addition, a high diversity of hues is possible, because different tinting bases BF with different hues can be mixed with each other to obtain a desired hue.

[0109] The at least one tinting base BF is preferably present in the composition according to the invention in a specific total amount. Thus, it is advantageous according to the invention for the coloring composition to contain a total amount of 5 to 40% by weight, more particularly 10 to 20% by weight, of the at least one tinting base BF, based on the total weight of the composition. The use of the at least one tinting base BF in the above-mentioned total amount ensures a high tint strength.

[0110] Particularly preferably, the at least one tinting base BF comprises at least one effect pigment and / or at least one color pigment.

[0111] Effect pigments are pigments which are able to produce decorative effects and additionally, but not exclusively, coloring effects in coatings. Effect pigments are characterized in particular by a flake structure. Preferred effect pigments are, for example, flake metal effect pigments such as flake aluminum pigments, gold bronze, oxidized bronze and / or iron oxide-aluminum pigments, pearlescent pigments and / or metal oxide-mica pigments, and / or other effect pigments such as flake graphite, flake iron oxide, multilayer effect pigments consisting of PVD films, and / or liquid crystal polymer pigments. Particularly preferred are flake metal effect pigments, more particularly flake aluminum pigments and / or coated metal oxide-mica pigments and / or borosilicates coated with metal oxides.

[0112] Examples of inorganic coloring pigments are white pigments, such as titanium dioxide; black pigments, such as carbon black, iron manganese black or spinel black; colored pigments, such as ultramarine green, ultramarine blue or manganese blue, ultramarine violet or manganese violet, iron oxide red, molybdate red or ultramarine red; iron oxide brown, mixed brown, spinel phase and corundum phase; or iron oxide yellow or bismuth vanadate. Examples of suitable organic coloring pigments are monoazo pigments, disazo pigments, anthraquinone pigments, benzimidazole pigments, quinacridone pigments, quinophthalone pigments, diketopyrrolopyrrole pigments, dioxadiazole pigments, pyrrolidine ... Oxazine pigments, indanthrone pigments, isoindoline pigments, isoindolinone pigments, azomethine pigments, thioindigo pigments, metal complex pigments, perinone pigments, perylene pigments, phthalocyanine pigments or aniline black.

[0113] The at least one effect pigment and / or the at least one color pigment are preferably present in a total amount of 0.5 to 70% by weight, based on the total weight of the tinting base BF.

[0114] It can also be provided that the tinting base contains at least one binder which serves to stably disperse the pigments and thereby ensures a high tint strength and a high tint homogeneity due to the tinting base BF.

[0115] The binder used in the tinting base BF is preferably a polyurethane polymer, more particularly an anion-stabilized polyurethane polymer. Anion-stabilized polyurethane polymer means a polyurethane polymer comprising at least one group that can be converted into an anionic group (i.e., a potential anionic group) by a neutralizing agent. Examples of potential anionic groups that can be converted into anionic groups by a neutralizing agent include carboxylic acid, sulfonic acid and / or phosphonic acid groups, more particularly carboxylic acid groups.

[0116] The polyurethane polymer can be obtained by reacting a prepolymer containing isocyanate groups with a compound reactive toward isocyanate groups. The components are preferably reacted in conventional and known organic solvents. Here, the amount of organic solvent can vary within wide limits and should be sufficient to form a prepolymer solution with a suitable viscosity. Typically, up to 70% by weight, preferably 5-50% by weight, more preferably less than 20% by weight of solvent is used, based on the solid content. Therefore, the reaction can be carried out, for example, particularly preferably at a solvent content of 10-15% by weight, based on the solid content.

[0117] Such polyurethane polymers preferably have a number average molecular weight of 1000-30000 g / mol, more preferably 1500-20000 g / mol (determination: gel permeation chromatography, with polystyrene as standard), and an acid value of 5-70 mg KOH / g, more preferably 10-30 mg KOH / g (based on solid content), and can be prepared by reaction (preferably chain extension) of a prepolymer containing isocyanate groups.

[0118] The prepolymer containing isocyanate groups can be prepared by reacting a polyol having a hydroxyl value of 10 to 1800 mg KOH / g, preferably 50 to 1200 mg KOH / g (based on solid content) with an excess of polyisocyanate in an organic solvent that is not reactive with isocyanate at a temperature of up to 150° C., preferably 50 to 130° C. The equivalent ratio of NCO groups to OH groups is 2.0:1.0 to >1.0:1.0, preferably 1.4:1 to 1.1:1.

[0119] The polyols used to prepare the NCO prepolymers can be low and / or high molecular weight. For the preparation of anionically stabilized polyurethane polymers, the polyols contain at least one anionic group and / or a group that is susceptible to anion formation. Low molecular weight polyols having a molecular weight of 60 to 400 daltons can also be used concomitantly to prepare prepolymers containing isocyanate groups.

[0120] In order to obtain NCO prepolymers with high flexibility, the fraction of predominantly linear polyols added, preferably with an OH value of 30 to 150 mg KOH / g (based on the solids content), should be high. Up to 97% by weight of the total amount of polyols can consist of saturated and unsaturated polyesters with a number-average molecular weight Mn of 400 to 5000 daltons. Polyesterdiols are prepared by esterifying organic dicarboxylic acids or their anhydrides with organic diols or are derived from hydroxycarboxylic acids or lactones. Particular preference is given to using linear polyesters obtainable by reacting aliphatic and aromatic dicarboxylic acids with aliphatic diols.

[0121] In addition to polyesters, NCO prepolymers are also prepared using other polyols, at least one of which has carboxyl, sulfonic and / or phosphonic acid groups. Preferably used are alkanoic acids with two hydroxyl groups on the α-position carbon atom. These polyols have at least one, usually 1 to 3, carboxyl groups in the molecule. They have 2 to about 25, preferably 3 to 10 carbon atoms. The carboxyl-containing polyols can account for 3 to 100% by weight, preferably 5 to 50% by weight, of the total polyol components in the NCO prepolymer.

[0122] The amount of ionizable carboxyl groups in salt form obtained by carboxyl neutralization is at least 0.4% by weight, preferably at least 0.7% by weight, based on the solids of the NCO prepolymer. The upper limit is about 12% by weight. The amount of dihydroxyalkanoic acid in the unneutralized prepolymer gives an acid number of 10 to 40 mg KOH / g (based on the solids content).

[0123] The other polyols without carboxyl, sulfonic acid and / or phosphonic acid groups are preferably selected from C 3 -C 8Alkanediols, especially 1,6-hexanediol. These diols are generally used in amounts of 0.5 to 15% by weight, preferably 1 to 7% by weight, based in each case on the total weight of the synthesis components for the preparation of the anionically stabilized polyurethane polymer.

[0124] Typical polyfunctional isocyanates for preparing anionic polyurethane polymers are aliphatic, alicyclic and / or aromatic polyisocyanates having at least two isocyanate groups per molecule. Isomers or isomer mixtures of organic diisocyanates are preferred. Due to their high stability to ultraviolet light, aliphatic (cyclic) diisocyanates cause products with a low tendency to yellowing. The polyisocyanate component for forming the prepolymer may also include a portion of higher polyisocyanates, provided that this does not cause any gelling. Suitable triisocyanates are products formed by trimerization or oligomerization of diisocyanates or by reaction of diisocyanates with polyfunctional compounds containing OH or NH groups. The average functionality may optionally be reduced by adding monoisocyanates.

[0125] Examples of polyisocyanates that can be used include phenylene diisocyanate, toluene diisocyanate, xylene diisocyanate, biphenyl diisocyanate, naphthalene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate, cyclobutane diisocyanate, cyclopentylene diisocyanate, cyclohexylene diisocyanate, methylcyclohexylene diisocyanate, dicyclohexylmethane diisocyanate, ethylene diisocyanate, trimethylene diisocyanate, tetramethylene diisocyanate, pentamethylene diisocyanate, hexamethylene diisocyanate, propylene diisocyanate, ethylethylene diisocyanate, and trimethylhexane diisocyanate.

[0126] For the preparation of anionic polyurethane polymer dispersions with a high solids content, diisocyanates of the general formula (IV) are used in particular:

[0127]

[0128] wherein X is a divalent cyclic and optionally aromatic hydrocarbon group, preferably dicyclohexylmethyl, naphthylene, diphenylene or 1,2-, 1,3- or 1,4-phenylene optionally substituted by halogen, methyl or methoxy, more preferably dicyclohexylmethyl, and R 3 and R 4 is hydrogen or an alkyl group having 1 to 4 carbon atoms, preferably hydrogen. A diisocyanate of formula (IV) which is particularly preferably used in the context of the present invention is 4,4'-methylenedicyclohexyl diisocyanate (also known as H 12 MDI).

[0129] The NCO prepolymer contains at least 0.5% by weight of isocyanate groups, preferably at least 1% by weight of NCO, based on solids. The upper limit of NCO is 15% by weight, preferably 10% by weight, more preferably 5% by weight.

[0130] The isocyanate groups of the prepolymer containing isocyanate groups react with a modifier or a chain extender. The amount of modifier added preferably allows chain extension and thus increases the molecular weight. The modifier used is preferably an organic compound containing hydroxyl and / or secondary and / or primary amino groups, especially a polyol and / or polyamine with 2, 3 and / or higher functionality. Examples of polyamines that can be used are ethylenediamine, trimethylenediamine, tetramethylenediamine, pentamethylenediamine, hexamethylenediamine or diethylenetriamine. Examples of polyols that can be used are trimethylolpropane, 1,3,4-butanetriol, glycerol, erythritol, meso-erythritol, arabitol, adonitol, etc. Trimethylolpropane is preferably used. The equivalent ratio of NCO prepolymer to modifier is preferably 2.0:1.0 to 1.0:2.0, more particularly 1.1:1 to 1:1.1.

[0131] In the context of the present invention, anionically stabilized polyurethane polymers are particularly preferably obtainable by reaction of NCO prepolymers obtainable by reaction of:

[0132] (i) 55 to 70% by weight, based on the total weight of compounds (i) to (iv), of at least one polyester polyol having an OH number of 40 to 100 mg KOH / g and a number-average molecular weight Mn of 1000 to 3000 Da, based on the solids content, the polyester polyol preferably containing no olefinic double bonds,

[0133] (ii) 3 to 7% by weight, based on the total weight of compounds (i) to (iv), of at least one alkanoic acid having 3 to 8 carbon atoms and two hydroxyl groups on the carbon atom in the α-position, more particularly dimethylolpropionic acid,

[0134] (iii) 0.5-3 wt % of at least one C based on the total weight of compounds (i) to (iv) 3 -C 8 an alkanediol, more particularly 1,6-hexanediol, and

[0135] (iv) 25-30% by weight, based on the total weight of compounds (i) to (IV), of at least one diisocyanate of the formula (IV) in which X = dicyclohexylmethyl and R 3 =R 4 =Hydrogen.

[0136] The equivalent ratio of NCO prepolymer to modifier is preferably from 2.0:1.0 to 1.0:2.0, more particularly from 1.1:1 to 1:1.1.

[0137] The anionically stabilized polyurethane polymer is neutralized with a base, preferably an organic base, more particularly N,N'-dimethylethanolamine, the base being added in an amount such that a degree of neutralization of 50-100%, preferably 60-80%, is achieved.

[0138] The at least one binder, more particularly the aforementioned anionically stabilized polyurethane polymer, is preferably present in an amount of 10 to 80% by weight, based on the total weight of the tinting binder BF.

[0139] The tinting base BF may also comprise at least one solvent. Solvents which can be used are those already mentioned above for the solvent L (component (a) of the composition according to the invention). Particularly preferably used are butyl glycol and / or methyl ethyl ketone.

[0140] Therefore, in a particularly preferred embodiment of the tinting base BF, the tinting base BF comprises, based on its total weight:

[0141] (a1) 0.5 to 70% by weight of at least one effect pigment and / or at least one coloring pigment,

[0142] (a2) 10 to 80% by weight of at least one binder selected from polyurethane polymers, amino resin polymers, polyacrylate polymers, polyester polymers and mixtures thereof, more particularly the anionically stabilized polyurethane polymers mentioned above, and

[0143] (a3) at least one organic solvent.

[0144] Base material B(f):

[0145] According to the present invention, it is preferred that, in addition to the above essential ingredients, the composition further comprises at least one binder B. This binder B is preferably different from the binder (a2) in the tinting binder BF. The use of this binder B results in the formation of a flexible and stable coating on the component without adversely affecting the demoulding properties of the component.

[0146] Surprisingly, it was found that the properties of the binder B are not critical for the demoulding properties achieved by the composition of the invention. It is also surprising that, independently of the binder B, the composition of the invention has no adverse effect on the resulting coating, in particular on its surface quality and flexibility. Thus, the composition of the invention can be combined with any desired binder B without adversely affecting the demoulding properties of the resulting component or the outstanding performance of the coating prepared with the composition on the component. In addition, the resulting coating can be adhesively bonded and / or coated with a basecoat and / or a clearcoat without expensive and inconvenient post-processing steps.

[0147] The at least one binder B is preferably present in a total amount (solid content) of 20-50% by weight, more preferably 25-40% by weight, more particularly 25-35% by weight, in each case based on the total weight of the composition. If the binder is a dispersion or solution in a solvent, the above total amount is calculated in each case using the solid content of the binder. The use of the at least one binder B in the above amount range ensures that a flexible and stable coating is formed on the component without adversely affecting the demoulding properties of the component.

[0148] According to the invention, it is preferred that the binder B is selected from (i) poly(meth)acrylates, more particularly hydroxy-functional and / or carboxylate-functional and / or amine-functional poly(meth)acrylates, (ii) polyurethanes, more particularly hydroxy-functional and / or carboxylate-functional and / or amine-functional polyurethanes, (iii) polyesters, more particularly polyester polyols, (iv) polyethers, more particularly polyether polyols, (v) copolymers of the aforementioned polymers, and (vi) mixtures thereof.

[0149] In this context, it is preferred that the binder B is selected from hydroxy-functional poly(meth)acrylates and / or polyester polyols, more particularly from a mixture of at least one hydroxy-functional poly(meth)acrylate and at least one polyester polyol. The use of such a mixture results in coatings having high flexibility and high resistance to environmental influences. Moreover, regardless of the surface properties of the material used to produce the component, a smooth surface is obtained. Furthermore, the coatings obtained can be adhesively bonded and / or coated with basecoats and / or clearcoats without expensive and inconvenient post-processing.

[0150] The hydroxyl-functional poly(meth)acrylate preferably has a hydroxyl number of 65-100 mg KOH / g, more preferably 70-95 mg KOH / g, more particularly 75-90 mg KOH / g or 80-85 mg KOH / g. In the context of the present invention, the hydroxyl number can be determined in accordance with EN ISO 4629-2:2016 and is in each case based on the solids content.

[0151] The hydroxy-functional poly(meth)acrylates preferably have an acid number of less than 25 mg KOH / g, more preferably an acid number of 1 to 20 mg KOH / g, very preferably an acid number of 4 to 16 mg KOH / g, more particularly 6 to 14 mg KOH / g or 8 to 12 mg KOH / g, the acid number for the purposes of the present invention being determined in accordance with DIN EN ISO 2114:2002-06 (method A) and in each case based on the solids content.

[0152] The number average molecular weight Mn and the weight average molecular weight Mw can be determined by gel permeation chromatography (GPC) using polymethyl methacrylate standards (PMMA standards) (DIN 55672-1: 2016-03). The number average molecular weight Mn of the hydroxy-functional poly(meth)acrylate is preferably 4000-10000 g / mol, more preferably 5000-9000 g / mol, very preferably 5500-8000 g / mol, more particularly 6000-7500 g / mol. The weight average molecular weight Mw of the hydroxy-functional poly(meth)acrylate is preferably 8000-30000 g / mol, more preferably 10000-25000 g / mol, very preferably 12000-22000 g / mol, more particularly 14000-20000 g / mol.

[0153] Polydispersity of hydroxy-functional poly(meth)acrylates D (=Mw / Mn) is preferably 2-3, more particularly 2.2-2.8.

[0154] The hydroxy-functional poly(meth)acrylate preferably has a hydroxy functionality of 5-15, more preferably 6-14, more particularly 8-12.

[0155] Hydroxy-functional poly(meth)acrylates can be obtained from ethylenically unsaturated monomers, preferably monoethylenically unsaturated monomers, by polymerization reactions common and well known to those skilled in the art. Initiators that can be used include peroxides, such as di-tert-butyl peroxide. Therefore, preferably hydroxy-functional poly(meth)acrylates can be prepared by the reaction of:

[0156] (a1) at least one hydroxy-functional (meth)acrylate, more particularly of the formula HC═CR x -COO-R y -OH (meth)acrylate, wherein R x H or CH 3 , R y is an alkylene group having 2 to 6, preferably 2 to 4, more preferably 2 or 3 carbon atoms,

[0157] (a2) at least one carboxyl-functional ethylenically unsaturated monomer, more particularly (meth)acrylic acid, and

[0158] (a3) at least one hydroxyl-free and carboxyl-free (meth)acrylate and / or at least one hydroxyl-free and carboxyl-free vinyl monomer, more particularly styrene.

[0159] Examples of hydroxy-functional (meth)acrylates (a1) are preferably hydroxyethyl methacrylate, hydroxyethyl acrylate, hydroxypropyl methacrylate and hydroxypropyl acrylate, particularly preferably hydroxyethyl methacrylate and 2-hydroxypropyl methacrylate. The amount of hydroxy-functional (meth)acrylate (a1) used to prepare the hydroxy-functional poly(meth)acrylate is calculated based on a target range of hydroxyl values ​​of 50-120 mg KOH / g.

[0160] The hydroxy-functional poly(meth)acrylates preferably contain small amounts of carboxyl groups. These groups are introduced into the poly(meth)acrylates during the polymerization reaction by using, for example, carboxyl-functional monomers (a2), more preferably by using acrylic acid and / or methacrylic acid. These monomers (a2), especially (meth)acrylic acid, are preferably present in a total amount of 20 to 45% by weight, more preferably 25 to 40% by weight, more particularly 30 to 35% by weight, based in each case on the total weight of all monomers used to prepare the hydroxy-functional poly(meth)acrylates.

[0161] In addition to hydroxy-functional (a1) and carboxyl-functional ethylenically unsaturated monomers (a2), when preparing hydroxy-functional poly(meth)acrylates, ethylenically unsaturated monomers (a3), more particularly monoethylenically unsaturated monomers (a3), are also used, which are free of hydroxyl groups and carboxyl groups. Particularly preferably used as vinyl monomer (a3) ​​is styrene. Vinyl monomers (a3), more particularly styrene, are preferably present in a total amount of 30 to 60% by weight, more preferably 35 to 55% by weight, more particularly 40 to 50% by weight, in each case based on the total weight of all monomers used to prepare the hydroxy-functional poly(meth)acrylate.

[0162] The hydroxy-functional poly(meth)acrylate can be used in an organic solvent, preferably in an aprotic solvent. A typical solvent for this purpose is, for example, n-butyl acetate, which can also be used when preparing the at least one hydroxy-functional poly(meth)acrylate. If the hydroxy-functional poly(meth)acrylate is used in a solvent, the solvent is considered to be part of the solvent L.

[0163] The hydroxy-functional poly(meth)acrylate is preferably used in a specific total amount. Thus, it is advantageous according to the invention for the hydroxy-functional poly(meth)acrylate to be present in a total amount of 10 to 97% by weight, preferably 40 to 70% by weight, more particularly 40 to 50% by weight, in each case based on the total weight of the solids content of all binders present in the composition.

[0164] The polyester polyols preferably have a hydroxyl number of from 100 to 200 mg KOH / g, more preferably from 110 to 180 mg KOH / g and very preferably from 120 to 160 mg KOH / g, in each case based on the solids content.

[0165] The acid number of the polyester polyols is preferably 0 to 9 mg KOH / g, more particularly 0.2 to 2 mg KOH / g, in each case based on the solids content.The hydroxyl number and the acid number of the polyester polyols can be determined as described above together with the hydroxy-functional poly(meth)acrylates.

[0166] The number average molecular weight of the polyester polyols is preferably 800 to 3000 g / mol, more preferably 1000 to 2000 g / mol, more particularly 1000 to 1600 g / mol. Here, this determination is carried out together with the determination of the molecular weight of the hydroxy-functional poly(meth)acrylate.

[0167] The polyester polyols are preferably branched.

[0168] The polyester polyols preferably have a hydroxyl functionality of 2.2 to 4, more preferably 2.5 to 3.6, very preferably 2.7 to 3.3.

[0169] The polyester polyols are preferably used in a specific total amount. Thus, it is advantageous according to the invention that the polyester polyols are present in a total amount of 40 to 97% by weight, preferably 40 to 70% by weight, more particularly 50 to 65% by weight, in each case based on the total weight of the solids content of all binders present in the composition.

[0170] The binder B can additionally be selected from aqueous anionically stabilized polyurethane dispersions, aqueous cationically stabilized polyurethane dispersions, aqueous polyurethane-polyurea dispersions and mixtures thereof. Suitable dispersions are described, for example, in the publications EP 2 066 712 A1, EP 1 153 054 A1 and EP 1 153 052 A1.

[0171] The coloring composition of the present invention is preferably characterized by a weight ratio of pigment to binder of 0.01 to 1.2. The above weight ratio relates to the total amount of pigment and binder (a2) and / or B in the composition.

[0172] Crosslinking agent V(f):

[0173] According to the invention, it is preferred that the composition comprises not only the above-mentioned ingredients and / or the at least one binder B, but also a crosslinker V. Particularly preferably, the composition of the invention comprises a combination of the binder B described above and the crosslinker V described below.

[0174] The crosslinking agent V is preferably selected from amino resins, polyisocyanates, blocked polyisocyanates, polycarbodiimides, UV light, heat, photoinitiators and mixtures thereof.

[0175] Particular preference is given to using as crosslinkers V polyisocyanates and polycarbodiimides.

[0176] It has been found that the use of polyisocyanates is suitable in particular when a mixture of the above-mentioned at least one hydroxy-functional poly(meth)acrylate and the at least one polyester polyol is present as binder B in the composition of the invention.

[0177] In this context, it is particularly preferred that the polyisocyanates have an NCO group functionality of more than 2.4 to 5, preferably 2.6 to 4, more preferably 2.8 to 3.6.

[0178] Particularly preferred in the context of the present invention are polyisocyanates containing at least one isocyanurate ring or at least one imino group. Polyisocyanate with diazinedione ring.

[0179] According to another embodiment, two different polyisocyanates may be present as crosslinking agent V, wherein the first polyisocyanate contains at least one isocyanurate ring and the second polyisocyanate contains at least one imino group. Diazinedione ring.

[0180] The polyisocyanate preferably comprises an oligomer of a diisocyanate, preferably a trimer or a tetramer. Particularly preferably, it comprises an imino group of a diisocyanate. The polyisocyanates are preferably aliphatic and / or cycloaliphatic, very preferably aliphatic polyisocyanates. As diisocyanate bases for the above oligomers, more particularly for the above trimers or tetramers, very preferably hexamethylene diisocyanate and / or isophorone diisocyanate, particularly preferably only hexamethylene diisocyanate.

[0181] The use of polycarbodiimides has been found to be suitable, in particular when aqueous anionically stabilized polyurethane dispersions, aqueous cationically stabilized polyurethane dispersions, aqueous polyurethane-polyurea dispersions and mixtures thereof are present as binder B in the composition of the invention.

[0182] The polycarbodiimide is preferably in the form of an aqueous dispersion. The polycarbodiimide used with particular preference can be obtained by reacting polyisocyanates with polycarbodiimide, followed by chain extension and / or end-capping with hydrophilic compounds containing hydroxyl and / or amine groups. Suitable dispersions are described, for example, in the disclosures EP 1644428A2 and EP 1981922A2.

[0183] By means of the crosslinking agent V, for example, the hardness, flexibility and elasticity of the resulting cured coating can be influenced. The use of polyisocyanates with a diazinedione structure leads in particular to coatings with a particular hardness, thereby preventing substrate structures from creeping onto the cured coating surface and causing undesired ripples there. Such polyisocyanates are available, for example, under the name Desmodur N3900 from Covestro. Similar results can be achieved with polyisocyanates containing an isocyanurate structure, which are available, for example, under the name Desmodur N3800 from Covestro, in which case the coating remains hard, but more flexible.

[0184] The composition preferably comprises a specific total amount of the at least one crosslinker V. It is therefore preferred according to the invention that the at least one crosslinker V is present in a total amount of 10 to 40% by weight, preferably 10 to 30% by weight, more particularly 15 to 25% by weight, based in each case on the total weight of the composition.

[0185] Furthermore, it is preferred that the composition comprises a specific molar ratio of functional groups of the crosslinker V to groups of the binder B reactive toward the crosslinker V. This ensures that the composition according to the invention is sufficiently crosslinked. Thus, advantageously, the molar ratio of the functional groups of the crosslinker V, in particular NCO groups or carbodiimide groups, to the sum of the groups reactive toward the functional groups of the crosslinker V, in particular hydroxyl groups or anionic groups, of the at least one binder B is from 0.4:1 to 1:1, preferably from 0.65:1 to 0.85:1, more particularly from 0.7:1 to 0.8:1.

[0186] Depending on the specific binder B and crosslinker V present in the composition of the invention, the composition of the invention is configured as a one-component system or can be obtained by mixing two (two-component system) or more (multi-component system) components. In thermochemically curable one-component systems, the components to be crosslinked, in other words binder and crosslinker, are present alongside one another, in other words in one component. The proviso is that the components to be crosslinked react effectively with one another only at relatively high temperatures, for example above 100° C., so that at least proportional premature thermochemical curing is prevented. Examples of such combinations may be hydroxy-functional polyesters and / or polyurethanes with melamine resins and / or blocked polyisocyanates as crosslinkers.

[0187] In thermochemically curable two-component or multicomponent systems, the components to be crosslinked, in other words binder and crosslinker, are present separately from one another in at least two components which are not combined until shortly before application. This form is selected when the components to be crosslinked react effectively with one another even at ambient temperature or at slightly elevated temperatures of, for example, 40 to 90° C., an example of such a combination being hydroxy-functional polyesters and / or polyurethanes and / or poly(meth)acrylates with free polyisocyanates as crosslinkers.

[0188] In the case of compositions of the invention obtainable by mixing two or more components, the weight ratio of the binder-containing component to the crosslinker-containing component is preferably from 100:10 to 100:100, more preferably from 100:20 to 100:80, more particularly from 100:50 to 100:70. The use of the above-mentioned mixing ratios ensures sufficient crosslinking of the release agent composition and in this way ensures easy demoulding and high adhesion to the surface of the produced component.

[0189] Crosslinking catalyst VK(g):

[0190] Furthermore, it is advantageous according to the invention if the composition comprises at least one crosslinking catalyst VK. A crosslinking catalyst VK is present in particular when the composition comprises at least one crosslinker V, more particularly a polyisocyanate.

[0191] The crosslinking catalyst VK serves primarily to catalyze the reaction between the functional groups of the crosslinker V and the groups of the at least one binder B which are reactive toward the functional groups of the crosslinker V.

[0192] The crosslinking catalyst is preferably selected from bismuth carboxylates.

[0193] According to the invention, in this context it is preferred that a specific bismuth carboxylate is present. Thus, the bismuth carboxylate preferably has the general formula (III):

[0194] Bi[OOC(C n H 2n+1 )] 3 (III)

[0195] Wherein n=5-15, preferably n=7-13, more particularly n=9-11.

[0196] The carboxylates are preferably branched, very preferably they have a tertiary or quaternary carbon atom, preferably a quaternary carbon atom, in the alpha position to the carbon atom of the carboxylate. In particular, among the bismuth carboxylates, bismuth trineodecanoate has been found to be particularly suitable.

[0197] Bismuth carboxylate is preferably in a stabilized form with the parent carboxylic acid HOOC (C n H 2n+1 ), wherein n has the above-mentioned definition. For the purposes of the present invention, the free carboxylic acid here is not to be regarded as a component of the crosslinking catalyst VK in form, even though it can have not only a stabilizer effect but can optionally also serve as a catalyst promoter; instead, it is included in the further additives described below.

[0198] The composition preferably comprises a specific total amount of the at least one crosslinking catalyst VK. It is therefore preferred according to the invention that the at least one crosslinking catalyst VK is present in a total amount of 0.01 to 3.5% by weight, preferably 0.1 to 2% by weight, more particularly 0.4 to 1.5% by weight, in each case based on the total weight of the composition.

[0199] Other ingredients (h)

[0200] In addition to the above-mentioned ingredients, the composition of the present invention may contain other ingredients. Examples of other ingredients are additives.

[0201] The at least one additive is preferably selected from wetting agents and / or dispersants, rheology aids, flow regulators, UV absorbers and mixtures thereof.

[0202] The at least one additive is preferably present in a total amount of 0 to 10 wt. %, based on the total weight of the composition.

[0203] The method of the present invention:

[0204] A second subject of the present invention is a process for producing a coated molding, comprising:

[0205] (A) applying the coloring composition of the present invention onto the surface of a mold to form a coating film,

[0206] (B) flash evaporation of the coating film,

[0207] (C) applying a component-forming composition to the flashed coating film,

[0208] (D) crosslinking the composition and the coating film, and

[0209] (E) The coated part is then removed.

[0210] The component is preferably a component made of foam. Foams herein include in particular elastomeric foams, more particularly flexible foams, and thermosetting foams, more particularly rigid foams.

[0211] The foam may be an open cell, closed cell or mixed cell foam. Foams herein also include those known as integral foams.

[0212] Particularly preferred foam is polyurethane foam. These are usually prepared by one or more polyols and one or more polyisocyanates. The blowing agent added to the polyol component to form foam is usually water, which reacts with part of the polyisocyanates to form carbon dioxide, so the reaction is accompanied by foaming. Long-chain polyols are used to obtain soft foam to elastic foam, especially flexible foam. If short-chain polyols are used, a highly cross-linked structure is usually formed, thereby usually resulting in the formation of rigid foam. The polyol for the preparation of polyurethane foam preferably includes polyester polyols, polyether polyols and / or polyester polyether polyols, therefore preferably selected from the above-mentioned polyols.

[0213] Fibers can also be blended into the foam formulation. When the formulation is foamed, the product is called fiber-reinforced foam. When making rigid foams, it is preferred to use fibers.

[0214] The coating of the component, more particularly the coating of the foam, is carried out during the formation of the component. For this purpose, first in process step (A), the composition of the invention is applied to all surfaces of the mold, preferably by spraying or spraying, for example pneumatically or electrostatically. If the composition of the invention is a two-component composition, it can be provided that the two components are fed into the mold via separate feed lines. During the feeding, the two components preferably have a temperature of 15 to 70° C., more preferably 15 to 40° C., more particularly 20 to 30° C. The feeding can be carried out under pressure.

[0215] In process step (B), the formed coating film is flashed off. The flashing time is preferably less than 2 minutes, more preferably less than 1 minute, very preferably less than 30 seconds. In this case, it is advantageous for the mold to have a temperature of 20-100° C., more preferably 30-90° C., very preferably 40-80° C., more particularly 50-70° C., and the dry film thickness is preferably 20-120 μm, more preferably 25-100 μm. In the flashing stage, the solvent L is removed from the composition, but the composition does not undergo any complete curing or crosslinking.

[0216] In process step (C), the component-forming composition is sprayed onto the flashed coating. This can be done in an open or closed process. In the case of an open process, overmolding is performed with the molding material. In the case of the preferred closed process, the mold is closed after the flash coating and the component-forming composition is then introduced, preferably by injection.

[0217] In process step (D), the coating film and the component-forming composition are crosslinked. At a mold temperature of preferably 45-75° C., more preferably 50-70° C., very preferably 52-65° C., the reaction time generally varies in the range of 1-8 minutes, typically 2-6 minutes.

[0218] When the reaction to form the component has taken place and the coating has cured, the formed component is coated with the coating of the crosslinked composition of the invention and can be removed from the mold in process step (E). The coated component exhibits a high level of color tone accuracy comparable to automotive OEM finishes. In addition, a high level of color tone stability is achieved, and there is no stress whitening and uneven coverage of the component edges. In addition, a higher level of color tone intensity and color tone diversity is achieved compared to the case of foam coloring. Finally, the produced component also exhibits a high color tone uniformity.

[0219] The coated parts can be used in many areas. Examples include the interior and exterior of motor vehicles, more particularly as seat cushions or fenders, steering wheels, sill trims or fender trims, or as shoe soles, or in the furniture and furniture upholstery sectors.

[0220] If necessary, the coated parts can be coated directly with further coatings (e.g. one or more basecoat materials and / or one or more clearcoat materials) - without sanding operations and optionally after simple cleaning - so that one or more basecoat films and / or one or more clearcoat films are formed. Preferably, no primer-surfacer mixture is applied to the parts coated according to the invention; instead, the basecoat film and / or the topcoat film, more particularly the clearcoat film, are applied directly. Basecoat and topcoat materials, in particular clearcoat materials, which can be used, are in principle all basecoats and clearcoats which are commonly used for OEM finishing or recoating. Such basecoats and clearcoats are obtainable, for example, from BASF Coatings GmbH, clearcoats which have proven themselves to be particularly good are in particular those from the EverGloss product line.

[0221] With regard to further preferred embodiments of the process according to the invention, in particular with regard to the compositions used in the process, the comments made above with regard to the colouring compositions according to the invention are valid mutatis mutandis.

[0222] Uses of the present invention:

[0223] Finally, another subject of the present invention is the use of the colouring composition according to the invention for producing coated parts, more particularly coated foams.

[0224] The coloring composition of the present invention and its use in the method of the present invention allow the preparation of coated parts that can be further processed without expensive and inconvenient post-treatment. Even without re-coating, the coating obtained by the composition on the part is highly elastic or flexible, and is UV stable and matte, resulting in not only demoulding the coated part without damage, but also effectively protecting the prepared coated part from environmental influences, such as UV radiation, dirt, etc., as early as after the preparation of the coated part. Since the composition of the present invention has a demoulding effect at the same time, the material can be used as a release agent and a coating. Therefore, there is no need to use a separate release agent (which must be expensive and inconvenient to remove before the part is post-treated). In addition, even if a foam (which is combined with a conventional release agent to cause the part to have a very irregular surface) is used for preparation, the prepared coated part also has a regular surface. Since only a small amount of composition residues remain in the mold, it is not necessary to clean the mold used before each further application of the composition. Compared with the coloring of the material used to prepare the part or with the vacuum film method, the use of the present invention leads to greater color accuracy, color stability, color intensity, color diversity and color uniformity.

[0225] A final subject of the present invention is the use of a composition according to the invention for improving the flow behavior of a composition for producing a component.

[0226] The use of the coating composition of the invention for producing coated parts surprisingly leads to an improvement in the flow behavior of the composition used to produce the part. In this way, even parts with complex geometries can be produced without defects, since coating the mold with the composition of the invention improves the flow behavior of the composition used to produce the part and in this way also allows filling, more particularly complete filling, of angular or narrow cavities of the mold.

[0227] With regard to further preferred embodiments of the use according to the invention, in particular with regard to the compositions used, the comments made above with regard to the colouring composition according to the invention and the process according to the invention are valid mutatis mutandis.

[0228] In particular, the present invention is described by the following embodiments:

[0229] According to a first embodiment, the present invention relates to a composition, more particularly a coating composition, comprising:

[0230] (a) at least one solvent L,

[0231] (b) at least one compound of the general formula (I):

[0232] R 1 -(C=O) r -O-(AO) s -R 2 (I)

[0233] in:

[0234] R 1 is a saturated or unsaturated aliphatic hydrocarbon group having 6 to 30 carbon atoms,

[0235] R 2 H, PO(OH) 2 a group, or an optionally partially phosphorylated group of a monosaccharide or disaccharide, or an optionally partially phosphorylated group of a sugar alcohol,

[0236] AO represents one or more oxyalkylene groups selected from ethylene oxide, propylene oxide and butylene oxide,

[0237] r is 0 or 1, s is 0-30;

[0238] (c) optionally, at least one polyether-modified alkylpolysiloxane,

[0239] (d) at least one polysiloxane of the general formula (II):

[0240] R 3 -Si(R 4 ) 2 -[O-Si(R 4 )(R 5 )] a -[O-Si(R 4 ) 2 ] b -O-Si(R 4 ) 2 -R 3 (II)

[0241] in:

[0242] R 3 and R 4 is, in each case independently of one another, methyl or (HO—CH 2 ) 2 -C(CH 2 -CH 3 )-CH 2 -O-(CH 2 ) 3 -* group,

[0243] R 5 Methyl,

[0244] a is 0 or 1-10, and

[0245] b is 3-30;

[0246] (e) at least one tinting base BF, and

[0247] (f) Optionally, at least one base material B.

[0248] According to a second embodiment, the invention relates to a composition according to embodiment 1, wherein the composition has a solids content of 30-60% by weight, preferably 35-55% by weight, more preferably 40-50% by weight, more particularly 42-48% by weight, in each case based on the total weight of the composition and measured according to ASTM D2369 (2015) (110° C., 60 minutes).

[0249] According to a third embodiment, the invention relates to a composition according to any one of embodiments 1 and 2, wherein the composition has a viscosity of 10-60 seconds, more particularly 20-30 seconds (DIN 4 flow cup), measured according to DIN 53211 (March 2012).

[0250] According to a fourth embodiment, the invention relates to a composition according to any of the preceding embodiments, wherein the at least one solvent L is chosen from organic solvents, water and mixtures thereof and is present in a total amount of 40 to 70% by weight, more preferably 45 to 65% by weight, very preferably 50 to 60% by weight, more particularly 52 to 58% by weight, in each case based on the total weight of the composition.

[0251] According to a fifth embodiment, the present invention relates to a composition according to any one of the preceding embodiments, wherein in general formula (I), R 1 is a saturated or unsaturated aliphatic hydrocarbon group having 10 to 24 carbon atoms, R 2 H, PO(OH) 2 A group, or an optionally partially phosphorylated group of a monosaccharide or disaccharide, or an optionally partially phosphorylated group of a sugar alcohol, more particularly an optionally partially phosphorylated group of sorbitol, AO represents one or more alkylene oxide groups selected from ethylene oxide and propylene oxide, r is 0 or 1, and s is 0 or 1-25.

[0252] According to a sixth embodiment, the present invention relates to a composition according to any one of the preceding embodiments, wherein in general formula (I), R 1 is a saturated or unsaturated aliphatic hydrocarbon group having 10 to 24 carbon atoms, R 2 H, PO(OH) 2 A group, or an optionally partially phosphorylated group of a monosaccharide, or an optionally partially phosphorylated group of a sugar alcohol, more particularly an optionally partially phosphorylated group of sorbitol, AO represents one or more oxyalkylene groups selected from ethylene oxide and propylene oxide, and in all the groups AO, the fraction of ethylene oxide is at least 70 mol%, r is 0 or 1, and s is 0 or 6-20.

[0253] According to a seventh embodiment, the invention relates to a composition according to any of the preceding embodiments, wherein the at least one compound of general formula (I) is present in a total amount of 0.1-10% by weight, more preferably 0.5-5% by weight, more particularly 1.5-4% by weight, in each case based on the total weight of the composition.

[0254] According to an eighth embodiment, the invention relates to a composition according to any one of the preceding embodiments, wherein the polyether-modified alkylpolysiloxane comprises at least one structural unit (R 7 ) 2 (OR 6 )SiO 1 / 2 and at least one structural unit (R 7 ) 2 SiO 2 / 2 , where R 6 is an ethylene oxide, propylene oxide and butylene oxide group, more particularly a mixture of ethylene oxide and propylene oxide and butylene oxide groups, and R 7 C 1 -C 10 Alkyl, more particularly methyl.

[0255] According to a ninth embodiment, the invention relates to a composition according to embodiment 8, wherein the polyether-modified alkylpolysiloxane has a molar ratio of siloxane:ethylene oxide groups:propylene oxide groups:butylene oxide groups of 6:21:15:1 to 67:22:16:1.

[0256] According to a tenth embodiment, the present invention relates to a composition according to embodiment 8 or 9, wherein the structural unit (R 7 ) 2 (OR 6 )SiO 1 / 2 With structural unit (R 7 ) 2 SiO 2 / 2 The molar ratio is from 1:10 to 1:15, more specifically from 1:10 to 1:13.

[0257] According to an eleventh embodiment, the invention relates to a composition according to any of the preceding embodiments, wherein the at least one polyether-modified alkylpolysiloxane is present in a total amount of 0% by weight or 0.1 to 6% by weight, preferably 0.5 to 4% by weight, more particularly 0.8 to 3% by weight, in each case based on the total weight of the composition.

[0258] According to a twelfth embodiment, the present invention relates to a composition according to any one of the preceding embodiments, wherein in the general formula (II), the group R 3 for (HO-CH 2 ) 2-C(CH 2 -CH 3 )-CH 2 -O-(CH 2 ) 3 -* group, group R 4 is methyl, group R 5 is methyl, a is 0, and b is 7-14.

[0259] According to a thirteenth embodiment, the invention relates to a composition according to any of the preceding embodiments, wherein the composition comprises a total amount of 0.1-5% by weight, preferably 0.5-4% by weight, more particularly 0.8-2.5% by weight of said at least one polysiloxane of general formula (II), in each case based on the total weight of the composition.

[0260] According to a fourteenth embodiment, the invention relates to a composition according to any one of the preceding embodiments, wherein the at least one tinting base BF is present in a total amount of 5-40 wt.-%, more particularly 10-20 wt.-%, based on the total weight of the composition.

[0261] According to a fifteenth embodiment, the present invention relates to a composition according to any of the preceding embodiments, wherein the tinting base BF comprises at least one effect pigment and / or at least one coloring pigment, preferably in a total amount of 0.5-70% by weight, based on the total weight of the tinting base BF.

[0262] According to a sixteenth embodiment, the present invention relates to a composition according to embodiment 15, wherein the at least one effect pigment (a1) is chosen from platelet-shaped metal effect pigments, pearlescent pigments, metal oxide-mica pigments, flake graphite, flake iron oxide, multilayer effect pigments obtained from PVD films, liquid crystal polymer pigments and mixtures thereof, more particularly chosen from platelet-shaped aluminum pigments and / or coated metal oxide-mica pigments and / or metal oxide-coated borosilicates.

[0263] According to a seventeenth embodiment, the present invention relates to a composition according to any one of embodiments 15 and 16, wherein the at least one colored pigment (A1) is selected from white pigments, black pigments, colored pigments, monoazo pigments, disazo pigments, anthraquinone pigments, benzimidazole pigments, quinacridone pigments, quinophthalone pigments, diketopyrrolopyrrole pigments, dioxadiazole ... Oxazine pigments, indanthrone pigments, isoindoline pigments, isoindolinone pigments, azomethine pigments, thioindigo pigments, metal complex pigments, perinone pigments, perylene pigments, phthalocyanine pigments, aniline black and mixtures thereof.

[0264] According to an eighteenth embodiment, the present invention relates to a composition according to any of the preceding embodiments, wherein the tinting base BF comprises at least one binder selected from polyurethane polymers, amino resin polymers, polyacrylate polymers, polyester polymers and mixtures thereof, especially anionically stabilized polyurethane polymers, preferably in a total amount of 10-80% by weight, based on the total weight of the tinting base BF.

[0265] According to a nineteenth embodiment, the invention relates to a composition according to embodiment 18, wherein the anionically stabilized polyurethane polymer is obtainable by reaction of an NCO prepolymer obtainable by reaction of:

[0266] (i) 55 to 70% by weight, based on the total weight of compounds (i) to (iv), of at least one polyester polyol having an OH number of 40 to 100 mg KOH / g and a number-average molecular weight Mn of 1000 to 3000 Da, based on the solids content, the polyester polyol preferably containing no olefinic double bonds,

[0267] (ii) 3 to 7% by weight, based on the total weight of compounds (i) to (iv), of at least one alkanoic acid having 3 to 8 carbon atoms and two hydroxyl groups on the carbon atom in the α-position, more particularly dimethylolpropionic acid,

[0268] (iii) 0.5-3 wt % of at least one C based on the total weight of compounds (i) to (iv) 3 -C 8 an alkanediol, more particularly 1,6-hexanediol, and

[0269] (iv) 25-30% by weight, based on the total weight of compounds (i) to (IV), of at least one diisocyanate of the formula (IV) in which X = dicyclohexylmethyl and R 3 =R 4 = Hydrogen,

[0270] The equivalent ratio of the NCO prepolymer to the modifier is preferably 2.0:1.0 to 1.0:2.0, more particularly 1.1:1 to 1:1.1.

[0271] According to a twentieth embodiment, the present invention relates to a composition according to any one of embodiments 17 and 18, wherein the anionically stabilized polyurethane polymer has a degree of neutralization of 50-100%, preferably 60-80%.

[0272] According to a twenty-first embodiment, the present invention relates to a composition according to any of the preceding embodiments, wherein the at least one binder B is present in a total amount (solid content) of 20-50% by weight, preferably 25-40% by weight, more particularly 25-35% by weight, in each case based on the total weight of the composition.

[0273] According to a twenty-second embodiment, the present invention relates to a composition according to any one of the preceding embodiments, wherein the binder B is selected from (i) poly(meth)acrylates, more particularly hydroxy-functional and / or carboxylate-functional and / or amine-functional poly(meth)acrylates, (ii) polyurethanes, more particularly hydroxy-functional and / or carboxylate-functional and / or amine-functional polyurethanes, (iii) polyesters, more particularly polyester polyols, (iv) polyethers, more particularly polyether polyols, (v) copolymers of said polymers, and (vi) mixtures thereof.

[0274] According to a twenty-third embodiment, the present invention relates to a composition according to embodiment 22, wherein the base B is chosen from hydroxy-functional poly(meth)acrylates and / or polyester polyols, more particularly from a mixture of at least one hydroxy-functional poly(meth)acrylate and at least one polyester polyol.

[0275] According to a twenty-fourth embodiment, the present invention relates to a composition according to any one of the preceding embodiments 22 and 23, wherein the hydroxy-functional poly(meth)acrylate has a hydroxyl value of 50-120 mg KOH / g, preferably 70-95 mg KOH / g, more particularly 75-90 mg KOH / g or 80-85 mg KOH / g.

[0276] According to a twenty-fifth embodiment, the present invention relates to a composition according to any one of the preceding embodiments 22 to 24, wherein the hydroxy-functional poly(meth)acrylate has an acid value of 1 to 20 mg KOH / g, more particularly 6 to 14 mg KOH / g or 8 to 12 mg KOH / g, and / or has a number average molecular weight Mn of 4000 to 10000 g / mol, preferably 5000 to 9000 g / mol, more preferably 5500 to 8000 g / mol, more particularly 6000 to 7500 g / mol.

[0277] According to a twenty-sixth embodiment, the present invention relates to a composition according to any one of the preceding embodiments 22-25, wherein the hydroxy-functional poly(meth)acrylate has a hydroxyl functionality of 5-15, preferably 6-14, more particularly 8-12.

[0278] According to a twenty-seventh embodiment, the present invention relates to a composition according to any one of the preceding embodiments 22-26, wherein the hydroxyl-functional poly(meth)acrylate can be prepared by reacting:

[0279] (a1) at least one hydroxy-functional (meth)acrylate, more particularly of the formula HC═CR x -COO-R y -OH (meth)acrylate, wherein R x H or CH 3 , R y is an alkylene group having 2 to 6, preferably 2 to 4, more preferably 2 or 3 carbon atoms,

[0280] (a2) at least one carboxyl-functional ethylenically unsaturated monomer, more particularly (meth)acrylic acid, and

[0281] (a3) at least one hydroxyl-free and carboxyl-free (meth)acrylate and / or at least one hydroxyl-free and carboxyl-free vinyl monomer, more particularly styrene.

[0282] According to a twenty-eighth embodiment, the present invention relates to a composition according to embodiment 27, wherein the carboxyl-functional ethylenically unsaturated monomers (a2), more particularly (meth)acrylic acid, are present in a total amount of 20 to 45% by weight, preferably 25 to 40% by weight, more particularly 30 to 35% by weight, based in each case on the total weight of all monomers used in the preparation of the hydroxy-functional poly(meth)acrylate.

[0283] According to a twenty-ninth embodiment, the present invention relates to a composition according to any one of the preceding embodiments 27 and 28, wherein the vinyl monomer (a3), more particularly styrene, is present in a total amount of 30-60% by weight, preferably 35-55% by weight, more particularly 40-50% by weight, based in each case on the total weight of all monomers used for the preparation of the hydroxy-functional poly(meth)acrylate.

[0284] According to a thirtieth embodiment, the present invention relates to a composition according to any of the preceding embodiments 22 to 29, wherein the hydroxy-functional poly(meth)acrylate is present in a total amount of 10 to 97% by weight, preferably 40 to 70% by weight, more particularly 40 to 50% by weight, based in each case on the total weight of the solids content of all binders present in the composition.

[0285] According to a thirty-first embodiment, the present invention relates to a composition according to any one of the preceding embodiments 22-30, wherein the polyester polyol has a hydroxyl value of 100-200 mg KOH / g, preferably 110-180 mg KOH / g, more particularly 120-160 mg KOH / g.

[0286] According to a thirty-second embodiment, the present invention relates to a composition according to any one of the preceding embodiments 22 to 31, wherein the polyester polyol has an acid value of 0 to 9 mg KOH / g, more particularly 0.2 to 2 mg KOH / g, and / or has a number average molecular weight of 800 to 3000 g / mol, preferably 1000 to 2000 g / mol, more particularly 1000 to 1600 g / mol.

[0287] According to a thirty-third embodiment, the present invention is directed to a composition according to any one of the preceding embodiments 22-32, wherein the polyester polyol is branched.

[0288] According to a thirty-fourth embodiment, the present invention relates to a composition according to any one of the preceding embodiments 22-33, wherein the polyester polyol has a hydroxyl functionality of 2.2-4, preferably 2.5-3.6, more particularly 2.7-3.6.

[0289] According to a thirty-fifth embodiment, the present invention relates to a composition according to any one of the preceding embodiments 22 to 34, wherein the polyester polyol is present in a total amount of 40 to 97% by weight, preferably 40 to 70% by weight, more particularly 50 to 65% by weight, based in each case on the total weight of the solids content of all binders present in the composition.

[0290] According to a thirty-sixth embodiment, the invention relates to a composition according to any one of the preceding embodiments, wherein the composition additionally comprises at least one crosslinker V.

[0291] According to the thirty-seventh embodiment, the present invention relates to a composition according to embodiment 36, wherein the crosslinker V is selected from amino resins, polyisocyanates, blocked polyisocyanates, polycarbodiimides, UV light, heat, photoinitiators and mixtures thereof.

[0292] According to a thirty-eighth embodiment, the present invention relates to a composition according to embodiment 37, wherein the polyisocyanate has an NCO group functionality of greater than 2.4 to 5, preferably 2.6-4, more preferably 2.8-3.6.

[0293] According to a thirty-ninth embodiment, the present invention relates to a composition according to any one of the preceding embodiments 37 and 38, wherein the polyisocyanate comprises at least one isocyanurate ring or at least one imino group Diazinedione ring.

[0294] According to a fortieth embodiment, the present invention relates to a composition according to any one of the preceding embodiments 37 and 38, wherein two polyisocyanates different from each other are present, the first polyisocyanate comprising at least one isocyanurate ring and the second polyisocyanate comprising at least one imino group Diazinedione ring.

[0295] According to a forty-first embodiment, the present invention relates to a composition according to any of the preceding embodiments 36 to 40, wherein the at least one crosslinker V is present in a total amount of 10 to 40% by weight, preferably 10 to 30% by weight, more particularly 15 to 25% by weight, in each case based on the total weight of the composition.

[0296] According to a forty-second embodiment, the present invention relates to a composition according to any one of the preceding embodiments 22 to 41, wherein the molar ratio of the functional groups of the crosslinker V, more particularly the NCO groups or the carbodiimide groups, to the sum of the groups reactive with the functional groups of the crosslinker V, more particularly the hydroxyl groups, of the at least one binder B is from 0.4:1 to 1:1, preferably from 0.65:1 to 0.85:1, more particularly from 0.7:1 to 0.8:1.

[0297] According to a forty-third embodiment, the invention relates to a composition according to any of the preceding embodiments, wherein the composition additionally comprises at least one crosslinking catalyst VK.

[0298] According to a forty-fourth embodiment, the invention relates to a composition according to embodiment 43, wherein the crosslinking catalyst VK is selected from bismuth carboxylates.

[0299] According to a forty-fifth embodiment, the present invention relates to a composition according to embodiment 44, wherein the crosslinking catalyst VK selected from bismuth carboxylates has the general formula (III):

[0300] Bi[OOC(C n H 2n+1 )] 3 (III)

[0301] Wherein n=5-15, preferably n=7-13, more particularly n=9-11.

[0302] According to a forty-sixth embodiment, the present invention relates to a composition according to any of the preceding embodiments 43 to 45, wherein the at least one crosslinking catalyst VK is present in a total amount of 0.01 to 3.5% by weight, preferably 0.1 to 2% by weight, more particularly 0.4 to 1.5% by weight, in each case based on the total weight of the composition.

[0303] According to the forty-seventh embodiment, the invention relates to a composition according to any one of the preceding embodiments, wherein the composition additionally comprises at least one pigment and / or at least one filler.

[0304] According to a forty-eighth embodiment, the invention relates to a composition according to any one of the preceding embodiments, wherein additionally at least one additive selected from wetting agents and / or dispersants, rheology aids, flow regulators, UV absorbers and mixtures thereof is present.

[0305] According to the forty-ninth embodiment, the present invention relates to the composition according to embodiment 48, wherein the at least one additive is present in a total amount of 0-10 weight %, based on the total weight of the composition.

[0306] According to a fiftieth embodiment, the present invention relates to a method for preparing a coated part, comprising:

[0307] (A) applying the composition according to any one of Embodiments 1 to 49 onto the surface of a mold to form a coating film,

[0308] (B) flash evaporation of the coating film,

[0309] (C) applying a component-forming composition to the flashed coating film,

[0310] (D) crosslinking the composition and the coating film, and

[0311] (E) The coated part is then removed.

[0312] According to a fifty-first embodiment, the present invention relates to a method according to embodiment 50, wherein the coated part is in the form of a part for the interior or exterior of a motor vehicle, such as a seat cushion, a fender, a steering wheel, a sill trim or a fender trim, a shoe sole, a furniture part or a furniture trim.

[0313] According to the fifty-second embodiment, the present invention relates to a method according to any one of embodiments 50 and 51, wherein the cured coating film is coated with at least one basecoat film and / or at least one clear coating film without an intermediate sanding operation, and the basecoat film and the clear coating film are cured individually or jointly.

[0314] According to a fifty-third embodiment, the present invention relates to the use of a composition according to any one of embodiments 1 to 49 for preparing a coated part, more particularly a coated foam.

[0315] According to a fifty-fourth embodiment, the present invention relates to the use of a composition according to any one of embodiments 1 to 49 for improving the flow behavior of a composition for preparing a part. Example

[0316] Description of the method:

[0317] 1. Solid content (solid, non-volatile matter)

[0318] The non-volatile matter is determined according to ASTM D2369 (date: 2015). In this procedure, 2 g of the sample is weighed into a pre-dried aluminum pan, the sample is dried in a drying oven at 110° C. for 60 minutes, cooled in a desiccator, and then weighed again. The residue relative to the total amount of sample introduced corresponds to the non-volatile matter.

[0319] 2. Determination of demoulding energy

[0320] In this case, a strip of adhesive (TESA 4651; see Tesa data sheet) measuring 2.5×4 cm is glued to the upper side of the mold. The tape is previously folded once at one end to form a loop through which a hole is drilled. A spring balance is suspended in this hole. Using a scalpel, the coating film is cut around the tape to obtain a 10 cm 2 The removal direction is perpendicular to the mold.

[0321] 3. Capability for further processing

[0322] Each release agent composition was applied to the mold surface at 55° C. Immediately after the application was completed, the liquid release agent composition was rubbed as evenly as possible / with constant pressure with the fingertips in a 5 second cycle. Once completely dry but unable to be released from the mold, each release agent composition was capable of further processing.

[0323] 4. Determination of acid value

[0324] The acid number is determined in accordance with DIN EN ISO 2114 (date: June 2002) using "Method A". The acid number corresponds to the mass of potassium hydroxide in mg required to neutralize 1 g of sample under the conditions specified in DIN EN ISO 2114. The acid number reported here corresponds to the total acid number specified in the DIN standard and is based on the solids content.

[0325] 5. Determination of OH value

[0326] The OH value is determined according to DIN 53240-2. The OH groups are reacted by acetylation with excess acetic anhydride. The excess acetic anhydride is subsequently decomposed by adding water to form acetic acid, and all of the acetic acid is back-titrated with ethanolic KOH solution. The OH value indicates the amount of KOH in mg which is equivalent to the amount of acetic acid bound in acetylation of 1 g of sample. The OH value is based on the solid content of the sample.

[0327] 6. Determination of number average molecular weight and weight average molecular weight

[0328] The number average molecular weight (Mn) is determined by gel permeation chromatography (GPC) in accordance with DIN 55672-1 (March 2016). In addition to the number average molecular weight, this method can also be used to determine the weight average molecular weight (Mw) and the polydispersity d (ratio of weight average molecular weight (Mw) to number average molecular weight (Mn)). Tetrahydrofuran is used as eluent. The determination is performed relative to a polystyrene standard. The column material consists of styrene-divinylbenzene copolymer.

[0329] Working Example

[0330] The following examples of the present invention and comparative examples are provided to illustrate the present invention but should not be construed as imposing any limitation.

[0331] With respect to the formulation ingredients and their amounts, the following should be borne in mind: Any reference to a commercially available product is intended to refer specifically to that commercially available product, regardless of the particular primary name chosen for that ingredient.

[0332] 1. Release agent composition used

[0333] Coating compositions Z1 to Z5 were each obtained by homogeneously mixing the ingredients reported in Table 1.

[0334] Table 1: Compositions used

[0335]

[0336] * The present invention

[0337] 1) Hydroxyl-functional poly(meth)acrylate (BASF SE) having a hydroxyl value of 82.5 mg KOH / g, an acid value of 10 mg KOH / g, an Mn of about 6800 g / mol, and an Mw of about 17000 g / mol,

[0338] 2) A polyester polyol (Covestro) having a hydroxyl value of 115 mg KOH / g and a hydroxyl functionality of about 3.5,

[0339] 3) Formula R 1 -(C=O) r -O-(AO) s -R 2 A mixture of compounds consisting of (a) R 1 = a mixture of saturated and unsaturated hydrocarbon radicals having 12 to 22 carbon atoms, r = 0, AO = a mixture of mainly ethylene oxide units and minor amounts of propylene oxide units, and R 2 =H (Mn≈650 g / mol); and (b) R 1 = an unsaturated hydrocarbon group having 21 carbon atoms, s = 0, and R2 =H composition (Münch Chemie International GmbH),

[0340] 4) Polyether-modified methyl polysiloxane (Borchers GmbH),

[0341] 5) Hydroxyl-modified polysiloxane of formula (III) having the above-mentioned groups (Siltec GmbH & Co. KG),

[0342] 6) UV absorber (BASF Corporation),

[0343] 7) Bismuth neodecanoate (King Industries),

[0344] 8) Isocyanurate-type hexamethylene diisocyanate trimer having an NCO content of 11.0% by weight (Covestro).

[0345] 9) The tinting base BF is selected from 55-M1 1L effect additive, 55-A 098 0.5L stone white, 55-M 141 0.5L yellow, 55-M 306 1L rust red, 55-A 556 1L ocean blue 2, 55-A 640 1L blue green, 55-A 974 1L tinting black, 55-M 99-21 1.0L coarse crystal silver, 55-M 800 1L pearl red brown.

[0346] 2. Determination of the adhesion of the release agent composition on the mold surface

[0347] The adhesion was determined as described above. The results are reproduced in Table 2.

[0348] Table 2: Adhesion of the compositions on the mold

[0349]

[0350] * The present invention

[0351] **Delamination

[0352] The non-inventive composition Z1 could not be separated from the mold, because the adhesive tape experienced delamination at 5 Newtons. In contrast, the inventive composition Z2 exhibited high demoulding properties even without the use of an additional external demoulding agent. Furthermore, the addition of the at least one tinting base BF did not lead to an increase in adhesion, so that the easy demoulding properties of the composition were not adversely affected by the coloring (see compositions Z2 and Z3).

[0353] 3. Determination of further processing time

[0354] The further processing time was determined as described above. The results are reproduced in Table 3.

[0355] Table 3: Further processing time of release agent compositions

[0356]

[0357] * The present invention

[0358] As can be seen from Table 3, the composition Z2 according to the invention has a shorter flash time than the non-inventive composition Z1. Furthermore, the addition of the tinting base BF has no adverse effect on the flash time (see compositions Z2 and Z3). These short flash times allow short operating times for process step (B) and are therefore an efficient process solution.

[0359] 4. Preparation and Testing of Coated Parts

[0360] 4.1 Preparation of coated parts

[0361] The coating compositions Z2 and Z4 according to the invention and the coating composition Z3 not according to the invention were each applied manually pneumatically (SATA Jet 4000B HVLP with nozzle 1.0) to the surface of a mold in the form of a plate (the mold consisted of an aluminum alloy; plate dimensions: 200 mm×200 mm×20 mm, unstructured). The mold temperature was 55° C. or 65° C. The films were then flashed (flash time: 20-25 seconds; dry film thickness: about 80 μm (by optical microscope)).

[0362] After flashing, the mold is closed and the polyester-based polyurethane foam system is injected. This system can be prepared by mixing the A component (containing 100 wt.% of the polyol mixture 270 / 40 1) and 10.6 wt% Elastopan S 7429 / 155 catalyst 2) ) and component B (containing Iso 187 / 68 3) ) are mixed in a ratio of 100:84. The foam density is 280-320kg / m 3 In the case of composition Z3, a foam system with a blue coloration was used.

[0363] 1 Polyester polyol mixture with an OH value of 51 mg KOH / g (BASF Italia SpA)

[0364] 2 Isocyanate based on 4,4'-diphenylmethane diisocyanate, NCO content 18.7% (BASF Italia S.pA)

[0365] 3 A mixture of aliphatic tertiary amines, diols and stabilizers with a water content of 3.9% by weight (BASF Italia S.pA)

[0366] Curing of the coating film and formation of the polyurethane foam took place in a closed mold at 55° C. or 65° C. within a period of 4 minutes.

[0367] After a curing time of 4 minutes, the coated foam can be removed manually, easily and completely from the tool without auxiliaries. The coating surface has the mattness required in the footwear industry.

[0368] 4.2Ross bending test

[0369] Using the individual components prepared above and coated with compositions Z2 and Z4 according to the invention, the Ross bending test was carried out at a bending angle of 60° in accordance with ASTM D1052: 2009. The test was carried out over more than 100,000 cycles in each case, wherein the components were checked for the presence of damage to the coating surface after 50,000 cycles and then after every further 10,000 cycles.

[0370] Even after 100 000 cycles, the components coated with the compositions Z2 and Z5 according to the invention did not show any surface damage. The coatings obtained from the compositions thus not only lead to excellent demoulding properties of the components after their production, but also exhibit high adhesion to the components and high flexibility. The pigmented coatings are therefore also extremely robust and therefore do not lead to stress whitening of the type that occurs, for example, in vacuum foil processes.

[0371] 4.3 Wear resistance

[0372] The wear resistance of the parts coated with the compositions Z2 and Z4 according to the invention was tested based on DIN EN ISO 11640:2017-05. For this purpose, the corresponding parts were clamped in an SDL Atlas Crockmeter. The painted surface of the parts was rubbed with a pressure of 9 N using commercially available sandpaper of grade P280 for 25 back and forth strokes with a stroke length of 5 cm. The coloring residues on the sandpaper and the surface of the coating were then checked. Although the sandpaper had small coating residues, there was no visible damage to the coating. Therefore, the coating according to the invention resulted in a coating with good wear resistance.

[0373] 4.4 Migration fastness

[0374] In order to investigate the migration behavior of the pigments under pressure, the 1-NOVO paint system was investigated in accordance with DIN EN ISO 15701:2015-07. In this case, the painted surface of each component was covered with a PVC foil from James Heal (in accordance with EN ISO 15701). The component and the PVC foil were sandwiched between two glass plates of a James Heal Perspirometer and weighed with a 4.5 kg weight. The Perspirometer was subsequently stored at 50° C. for 16 hours. At the end of the storage time, the experimental apparatus was dismantled again and the discoloration of the PVC foil was checked. In all tested components, the PVC foil did not discolor. Therefore, the migration fastness of the coated components is high.

[0375] 4.5 Hue Accuracy, Hue Intensity

[0376] The resulting parts were visually evaluated for tone accuracy and intensity. The results obtained were as follows (Grade 1: tone accuracy comparable to OEM vehicle finish, i.e. very high tone intensity, Grade 2: tone accuracy worse than OEM vehicle finish, i.e. high tone intensity, Grade 3: tone accuracy much worse than OEM vehicle finish, i.e. low tone intensity).

[0377]

[0378] 1) Coating with coating Z3 (not of the present invention)

[0379] 2) Coating with coating Z2 (not of the present invention)

[0380] 3) Coating with coating Z4 (not of the present invention)

[0381] As can be seen from the table above, coating the parts with the composition according to the invention (parts B2 and B3) results in a higher shade accuracy and shade intensity than the coloring of the foam (part B1).

[0382] 4.6 Compatibility

[0383] To determine the compatibility of the coating composition with the foam composition used to produce the component, the component was produced as described in 4.1. The component was produced using the release agent composition Z2 according to the invention, a wax-based release agent (Münch Chemie) and a silicone-based release agent (Münch Chemie). The compatibility of the release agent with the foam system used to produce the component was assessed visually, with incompatibilities showing up as bumps and depressions in the foam. The results obtained are as follows (Grade 1: very good compatibility, Grade 2: good compatibility, Grade 3: satisfactory compatibility, Grade 4: adequate compatibility).

[0384] Table 4: Compatibility of release agent compositions

[0385]

[0386] * The present invention

[0387] As can be seen from Table 4, the coating compositions according to the invention have very good compatibility with the foam systems used to produce the parts. The parts produced using the composition Z2 according to the invention have no projections or depressions. In contrast, the release agent compositions not according to the invention lead to projections and depressions during the production of the parts and therefore show only satisfactory or only marginal compatibility.

[0388] 4.7 Effect of release agent composition on the fluidity of the composition used to prepare the part

[0389] In order to determine the influence of the coating composition on the foam composition used to produce the parts, the parts were produced as described in 4.1. The parts were produced using the release agent composition Z2 according to the invention and an aqueous release agent (MP6032-5, Münch Chemie). The molds used were molds with simple geometries, molds in the form of soles with more complex geometries, and molds with angled geometries, including struts that were only a few millimeters wide. The demoulding and the filling of the mold by the foam system were visually evaluated respectively. The results obtained are as follows (Grade 1: very good demoulding or very high improvement in the flow properties, Grade 2: good demoulding or high improvement in the flow properties, Grade 3: satisfactory demoulding or minimal defects in the part, Grade 4: unsatisfactory demoulding or a large number of defects in the part).

[0390] Table 5: Effect of release agent composition on the fluidity of foam system

[0391]

[0392] * The present invention

[0393] As can be seen from Table 5, the coating compositions according to the invention lead to excellent demoulding properties even when using molds with highly complex geometries. In addition, using the coating compositions according to the invention, the flow properties of the foam system are improved, so that even narrow cavities in the mold can be completely filled with the foam composition. This allows the defect-free production of parts with complex geometries. In contrast, in the case of more complex molds, the use of release agent compositions not according to the invention leads to poor demoulding properties. In addition, the use of release agent compositions not according to the invention does not have a positive effect on the flow properties of the foam composition, so that, especially in the case of complex molds, defects occur due to the inability to fill the cavities.

Claims

1. A coloring composition comprising: (a) at least one solvent L, (b) at least one compound of the general formula (I): R 1 -(C=O) r -O-(AO) s -R 2 (I) in: R 1 is a saturated or unsaturated aliphatic hydrocarbon group having 6 to 30 carbon atoms, R 2 is H, or an optionally partially phosphorylated group of sorbitol, AO represents one or more oxyalkylene groups selected from ethylene oxide, propylene oxide and butylene oxide, r is 0 or 1, s is 0-30; (c) optionally, at least one polyether-modified alkyl polysiloxane, (d) at least one polysiloxane of the general formula (II): R 3 -Si(R 4 )2-[O-Si(R 4 )(R 5 )] a -[O-Si(R 4 )2] b -O-Si(R 4 )2-R 3 (II) in: R 3 is a (HO-CH2)2-C(CH2-CH3)-CH2-O-(CH2)3-* group, R 4 Methyl, R 5 Methyl, a is 0, and b is 7-14; (e) at least one tinting base BF, and (f) at least one base material B, wherein the coloring composition additionally comprises at least one crosslinking agent V, The coloring composition further comprises at least one crosslinking catalyst VK selected from bismuth carboxylates.

2. The coloring composition according to claim 1, wherein in the general formula (I), R 1 is a saturated or unsaturated aliphatic hydrocarbon group having 10 to 24 carbon atoms, R 2 is H, or an optionally partially phosphorylated group of sorbitol, AO represents one or more oxyalkylene groups selected from ethylene oxide and propylene oxide, and the oxyethylene fraction in all groups AO is at least 70 mol%, r is 0 or 1, and s is 0 or s is 6-20.

3. The coloring composition according to claim 2, wherein R 2 It is an optionally partially phosphorylated group of sorbitol.

4. The coloring composition according to claim 1, wherein the at least one compound of the general formula (I) is present in a total amount of 0.1 to 10% by weight, based in each case on the total weight of the composition.

5. The coloring composition according to claim 2, wherein the at least one compound of the general formula (I) is present in a total amount of 0.1 to 10% by weight, based in each case on the total weight of the composition.

6. The coloring composition according to claim 4, wherein the at least one compound of the general formula (I) is present in a total amount of 0.5 to 5% by weight, based in each case on the total weight of the composition.

7. The coloring composition according to claim 4, wherein the at least one compound of the general formula (I) is present in a total amount of 1.5 to 4% by weight, based in each case on the total weight of the composition.

8. The coloring composition according to any one of claims 1 to 7, wherein the polyether-modified alkyl polysiloxane comprises at least one structural unit (R 7 )2(OR 6 )SiO 1 / 2 and at least one structural unit (R 7 )2SiO 2 / 2 , where R 6 is an ethylene oxide, propylene oxide or butylene oxide group, and R 7 C1-C 10 alkyl.

9. The coloring composition according to claim 8, wherein R 6 It is a mixture of ethylene oxide, propylene oxide and butylene oxide groups.

10. The coloring composition according to claim 8, wherein R 7 It is methyl.

11. The colored composition according to any one of claims 1 to 7, which is a colored coating composition.

12. The coloring composition according to any one of claims 1 to 7, wherein the at least one polyether-modified alkylpolysiloxane is present in a total amount of 0% by weight, based in each case on the total weight of the composition.

13. The coloring composition according to any one of claims 1 to 7, wherein the at least one polyether-modified alkylpolysiloxane is present in a total amount of 0.1 to 6% by weight, based in each case on the total weight of the composition.

14. The coloring composition according to claim 8, wherein the at least one polyether-modified alkylpolysiloxane is present in a total amount of 0.5 to 4% by weight, in each case based on the total weight of the composition.

15. The coloring composition according to claim 13, wherein the at least one polyether-modified alkylpolysiloxane is present in a total amount of 0.8 to 3% by weight, based in each case on the total weight of the composition.

16. The coloring composition according to claim 14, wherein the at least one polyether-modified alkylpolysiloxane is present in a total amount of 0.8 to 3% by weight, in each case based on the total weight of the composition.

17. The coloring composition according to any one of claims 1 to 7, comprising the at least one polysiloxane of the general formula (II) in a total amount of 0.1 to 5% by weight, in each case based on the total weight of the composition.

18. The coloring composition according to claim 16, comprising the at least one polysiloxane of the general formula (II) in a total amount of 0.1 to 5% by weight, in each case based on the total weight of the composition.

19. The coloring composition according to claim 17, comprising the at least one polysiloxane of the general formula (II) in a total amount of 0.8 to 2.5% by weight, in each case based on the total weight of the composition.

20. The colored composition according to any one of claims 1 to 7, wherein the at least one tinting base BF is present in a total amount of 5 to 40 wt.-%, based on the total weight of the composition.

21. The coloring composition of claim 18, wherein the at least one tinting base BF is present in a total amount of 5 to 40 wt. %, based on the total weight of the composition.

22. The coloring composition of claim 20, wherein the at least one tinting base BF is present in a total amount of 10-20 wt. %, based on the total weight of the composition.

23. A coloring composition according to any one of claims 1 to 7, wherein the tinting base BF comprises, based on its total weight: (a1) 0.5 to 70% by weight of at least one effect pigment and / or at least one coloring pigment, (a2) 10-80% by weight of at least one binder selected from the group consisting of polyurethane polymers, amino resin polymers, polyacrylate polymers, polyester polymers, and mixtures thereof, and (a3) at least one organic solvent.

24. The coloring composition of claim 21, wherein the tinting base BF comprises, based on its total weight: (a1) 0.5 to 70% by weight of at least one effect pigment and / or at least one coloring pigment, (a2) 10-80% by weight of at least one binder selected from polyurethane polymers, amino resin polymers, Polyacrylate polymers, polyester polymers and mixtures thereof, and (a3) at least one organic solvent.

25. The coloring composition of any one of claims 1 to 7, wherein the binder B is selected from (i) poly(meth)acrylates, (ii) polyurethanes, (iii) polyesters, (iv) polyethers, (v) copolymers of said polymers, and (vi) mixtures thereof.

26. A coloring composition as claimed in claim 25, wherein the binder B is selected from hydroxy-functional and / or carboxylate-functional and / or amine-functional poly(meth)acrylates, hydroxy-functional and / or carboxylate-functional and / or amine-functional polyurethanes, polyester polyols, polyether polyols, (v) copolymers of said polymers, and (vi) mixtures thereof.

27. The colored composition according to any one of claims 1 to 7, wherein the at least one crosslinker V is present in a total amount of 10 to 40% by weight, based in each case on the total weight of the composition.

28. The coloring composition according to claim 26, wherein the at least one crosslinker V is present in a total amount of 10 to 30% by weight, based in each case on the total weight of the composition.

29. The colored composition according to claim 27, wherein the at least one crosslinker V is present in a total amount of 15 to 25% by weight, based in each case on the total weight of the composition.

30. A method of preparing a coated molded article by (A) applying the coloring composition according to any one of claims 1 to 29 onto the surface of a mold to form a coating film, (B) flash evaporation of the coating film, (C) applying a component-forming composition to the flashed coating film, (D) crosslinking the composition and the coating film, and (E) The coated part is then removed.

31. Use of a colouring composition as claimed in any one of claims 1 to 29 for improving the flow behaviour of a composition for producing a part.

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