DE102006048631A1 - Chrome effect paint, chrome effect paint and painting process - Google Patents

Abstract

A chromium effect paint is provided wherein the chromium effect paint comprises a suspension of aluminum pigment having an average particle size of less than or equal to 10 microns and at least one organic solvent. Furthermore, a chromium effect paint and a Lackierverfahren be provided.

Description

The The present invention relates to a chrome effect paint, a chrome effect paint and a painting process. The invention particularly relates to a Chrome effect paint, a chrome effect paint and a paint process for motor vehicles or automotive parts.

The Chrome plating of metal parts for wear and corrosion protection is known for a long time. For example, components made of cast iron, Copper, steel by electroplating one up to 500 μm thick Chrome layer to be protected. Because of the aesthetic Effect of the high-gloss and reflective chrome plating are also so-called decorative chrome plating popular. In such Dekorverchromungen is less the protective effect the chromium layer rather than their optical effect in the foreground. In particular, here is the "mirror effect" of a chrome plating desired. Decorative chrome plating can for example, by electroplating a chromium layer of 1 μm or less.

Indeed Galvanic chrome plating processes are complicated and expensive. Therefore alternative methods of surface refinement have been developed the one of the chrome plating optically similar result trying to achieve. For example, the so-called Achrolyte method proposed in which a tin-cobalt alloy applied galvanically becomes. The Achrolyte method also sets the presence a galvanic coating system ahead. Such a plant is however for smaller paint shops or even private individuals to elaborate and / or too expensive.

It are therefore in the automotive field various chrome effect paints which has also been developed by smaller paint shops or Private individuals are applicable. For example, the company offers Alsa Corporation from Vernon in California, USA, the "chromeFX" system for so-called "water mirroring". It is by means of a special spraying system applied a chrome effect paint based on aluminum pigments. However, such a system is also available for most paint shops and Private individuals too expensive or unprofitable.

Farther Some manufacturers also offer spray paints based on aluminum pigment as chromium effect paints, such as the company Alsa Corporation under the product name "ghost chrome" However, chrome effect paints have the disadvantage that for the chrome plating typical "mirror effect" by applying a protective one Clear lacquer is lost. As a result, the paint loses its chrome effect and now acts only "silvery", i.e. the paint loses its metallic shine and its mirror effect. Especially this one Metallic shine and especially the mirror effect are, however, which make up the so popular chrome effect.

in the In view of the above-mentioned disadvantages of the prior art beats the present invention, a chromium effect paint according to claim 1, a chrome effect paint according to claims 11 and 20, as well as a painting process according to claims 26 and 39 in front. Other aspects, benefits and details of the present Invention will become apparent from the dependent claims, the description and the attached Drawings.

According to one first embodiment The present invention is a chromium effect paint comprising a Suspension of aluminum pigment with an average particle size of smaller or equal to 10 μm, and at least one organic solvent. Typically, the average particle size of the aluminum pigment is smaller than 10 μm and especially formed in a range of 5 μm or smaller.

One such chrome effect paint suitable to be used in a paint job to become, by applying a clear coat their metallic Gloss and especially its mirror effect does not lose. Especially is such a chrome effect paint for the painting of motor vehicles or motor vehicle parts suitable. Furthermore, such a chrome effect paint suitable, by means of conventional spray guns to be processed so that no expensive and expensive painting system for processing the chrome effect paint must be provided. The chrome effect paint according to the embodiments The present invention is therefore particularly simple and cost-effective Processing by private individuals, for example in the tuning sector, suitable.

According to one another embodiment In the present invention, the aluminum pigment is highly brilliant. The aluminum pigment is typically a nonleafing pigment.

According to one more another embodiment the chromium effect lacquer contains 0.05 to 0.75% by weight aluminum pigment, in particular 0.075 to 0.25 wt .-% aluminum pigment, on.

Accordingly achieved the chrome effect paint according to the embodiments The present invention even with very low pigment addition a high opacity and is therefore very productive.

Typically, in a chromium effect paint according to one of the embodiments, the invention comprises underlying invention, the organic solvent at least one of the following substances: butyl glycol, methoxypropanol, methoxypropyl acetate, ethyl acetate, isopropyl acetate, ethanol, isopropanol. Typically, the organic solvent comprises ethanol and at least one of the following: butyl glycol, methoxypropanol, methoxypropyl acetate, ethyl acetate, isopropyl acetate. In this case, according to one embodiment of the present invention, the organic solvent may have between 80 and 99.5% by weight of ethanol, based on the total weight of the organic solvent.

According to one another embodiment of the present invention a chrome effect paint a precoat layer, which consists of a high gloss Paint is made, a chrome effect paint coating, which is made of a chrome effect paint according to one embodiment of the present invention, an intermediate varnish layer, made of a transparent colorless water-based paint and a clear coat. In particular, the clearcoat layer be formed from a motor vehicle clearcoat.

A Such Chromeffektfarbe according to a the embodiments the present invention has a very good chrome effect, In particular, even after the application of a clearcoat, the Mirror effect received or is compared to the state without Clear coat only slightly reduced. Thus, the chrome effect finish according to the embodiments good for Serve motor vehicles or motor vehicle parts, as they are by the Intermediate varnish and the clearcoat is protected against environmental and weathering influences.

According to one embodiment According to the present invention, the precursor layer has a dry film thickness of 40 μm up 80 microns on. Typically, the precursor layer is made of an acrylic varnish educated. According to one another embodiment According to the present invention, the chrome effect paint layer has a Dry film thickness of 10 μm up to 30 μm on. According to one more another embodiment According to the present invention, the intermediate varnish layer has a dry film thickness of 15 μm to 25 μm up. According to one another embodiment In the present invention, the clear coat layer has a dry film thickness of 30 μm to 60 μm. Typically, the clearcoat is of a two-part acrylic finish educated.

According to one alternative embodiment of the present invention has a chromium effect coating a precursor layer, the one from a high gloss Paint is made, a chrome effect paint coating, which is made of a chrome effect paint according to one of embodiments of the present invention, and a clearcoat film, from a clearcoat, especially a motor vehicle clearcoat, on Water base is formed on.

Also Such chrome effect painting has a very good chrome effect in particular, even after the application of a clearcoat, the Mirror effect received or is compared to the state without applied clearcoat only slightly reduced. Thus, the chrome effect finish according to the embodiment especially good for motor vehicles or motor vehicle parts suitable, since they through the intermediate lacquer and the clearcoat is protected against environmental and weather influences.

According to one embodiment According to the present invention, the precursor layer has a dry film thickness of 40 μm up 80 μm, wherein the precursor layer is typically formed from an acrylic varnish is. According to one another embodiment of the present invention, the chromium effect paint layer has a dry film thickness of 10 μm to 30 μm up. According to one more another embodiment In the present invention, the clear coat layer has a dry film thickness of 30 μm to 70 μm.

According to one In another aspect of the present invention, a painting process comprises the steps (a) applying a high-gloss Precoat layer, (b) applying a chrome effect lacquer layer according to a the embodiments of the present invention to the high gloss precursor layer, (c) Applying an intermediate lacquer layer of a transparent lacquer water-based on the chrome effect paint layer; and (d) applying a clearcoat. In particular, it may be in the painting process to a painting process for a motor vehicle or a motor vehicle part act, said in this Case of the clearcoat is typically a motor vehicle clearcoat.

One Painting method according to the above Aspect of the present invention allows for simple and inexpensive Way to create a chrome effect paint by a Clear lacquer is protected against environmental and weather influences and still an excellent Chrome effect, i. especially mirror effect. Especially can the above method without complex special device also by smaller paint shops or private individuals are carried out.

According to one embodiment of the present invention, the precoat layer is baked at 50 ° C to 80 ° C for 20 to 45 minutes. Typically, the precoat layer is not ground before applying the chrome effect lacquer layer and can be flashed for 1 to 3 days before applying the chrome effect lacquer layer. According to another embodiment of the present invention The chromium effect paint is sprayed on, with the chrome effect paint typically being applied in 2 to 6 successive spray passes and an intermediate flash off time of 3 to 10 minutes being provided between two spray passes. Typically, the chrome effect lacquer layer is slightly polished after being applied with polishing wadding. According to a further embodiment of the present invention, the intermediate coat is applied in one spray pass, in particular in exactly one spray pass. In accordance with another embodiment of the present invention, the clearcoat is applied in a mist and opaque finish, wherein the clearcoat is typically dried at 50 ° C to 80 ° C for 20 to 45 minutes.

According to one alternative aspect of the present invention includes a painting process the steps: (a) applying a high-gloss primer layer, (b) Applying a chrome effect paint layer according to one of the embodiments of the present invention to the high gloss precursor layer and (c) Applying a waterborne clearcoat to the chrome effect paint layer. In particular, the painting process may be a painting process for a Act vehicle or a motor vehicle part, said in this Case of waterborne clearcoat typically a motor vehicle clearcoat is water-based.

One Painting method according to the above alternative aspect of the present invention allows on simple and inexpensive Way to make a chrome effect paint, which is covered by a clearcoat protected against environmental and weather influences and still has an excellent chrome effect, i.e. especially mirror effect. In particular, that can above procedure without elaborate special device also by smaller paint shops or private individuals become.

According to one embodiment of the present invention, the precursor layer at 50 ° C to 80 ° C for 20 to Branded for 45 minutes. Typically, the precursor layer will be present the application of the Chromeffektlackschicht not ground and may take 1 to 3 days before applying the chrome effect lacquer layer flash off. According to another embodiment the present invention, the chromium effect paint is sprayed on, the Chrome effect paint typically applied in 2 to 6 consecutive spray passes is and between two spray passes a Zwischenablüftzeit of 3 to 10 minutes is provided. Typically, the chrome effect lacquer layer After applying polish wadding slightly polished off. According to one another embodiment In the present invention, the clearcoat is fogged and a covering closing passage applied, wherein the clearcoat typically at 50 ° C to 80 ° C for 20 to Dried for 45 minutes.

Even though The invention primarily based on paints or coatings for the automotive sector explained was and is, it is clear that the paint according to the invention or the coating process according to the invention can also be used in other fields, e.g. in the paint shop of machines, such as coffee makers and washing machines, bicycles and Bicycle parts, helmets, rims, hi-fi components and the like.

Based the attached Drawings will now be exemplary embodiments of the present invention. Showing:

1 a not to scale cross-section through the layer arrangement of a chrome effect paint according to an embodiment of the present invention.

2 a non-scale cross-section through the layer arrangement of a chrome effect paint according to another embodiment of the present invention.

A chrome effect paint according to one embodiment of the present invention comprises a suspension of highly brilliant aluminum pigment having a mean particle size of less than or equal to 10 μm. Typically, the average particle size of the aluminum pigment is less than 10 microns and in particular formed in a range of 5 microns or smaller. In this case, for example, the d ₅₀ value can be used for the mean particle size. The aluminum pigment is dispersed in an organic solvent comprising at least one of the following: butyl glycol, methoxypropanol, methoxypropyl acetate, ethyl acetate, isopropyl acetate, ethanol, isopropanol. Typically, the organic solvent comprises ethanol and at least one of the following: butyl glycol, methoxypropanol, methoxypropyl acetate, ethyl acetate, isopropyl acetate. In such an organic solvent, the aluminum pigment is dispersed at about 0.05 to 0.75 wt%, especially 0.075 to 0.25 wt%, based on the total weight of the suspension. Typically, the aluminum pigment is a non-leafing pigment, ie it does not float in a paint layer formed from the suspension.

Such a chrome effect lacquer is particularly suitable for use in a coating for motor vehicles or motor vehicle parts, which does not lose its metallic luster and in particular its mirror effect even after application of a clearcoat. Furthermore, such chromium effect paint is suitable to be processed by conventional spray guns, so that no expensive and on maneuvering paint system must be provided for processing the chrome effect paint.

It is pointed out that in the field of automotive coatings usually aluminum pigments with d ₅₀ values in the range of 15 microns to 20 microns, and rarely between 12 microns to 15 microns, are used. Generally, smaller particle size pigments are considered unsuitable for automotive coatings, cf. about the introduction of the DE 103 15 775 A1 , In contrast, in the chromium effect varnishes according to the present invention, a small aluminum pigment having an average particle size of 10 μm or smaller is used to obtain an excellent mirror effect. Nevertheless, the chromium effect coatings according to the present invention are particularly suitable for the painting of motor vehicles or motor vehicle parts.

in the The following will exemplify the preparation of a chrome effect paint explains without limiting the invention.

example 1

in the first example is a suspension of 1.5 g of phlegmatized Aluminum powder with an average particle size of 7 microns in 1 liter of solvent produced. As a solvent is a mixture of 80 wt .-% ethyl alcohol and 20 wt .-% water used.

Example 2

in the second example is a starting suspension of 10 wt .-% phlegmatized Aluminum powder with a mean particle size of 5 microns, 45 wt .-% ethyl acetate and 45 wt .-% isopropyl acetate used. Subsequently, 10 g of the starting suspension diluted with 11% ethyl alcohol, to get the chrome effect paint.

Example 3

in the third example is a starting suspension of 10 wt .-% phlegmatized Aluminum powder with a mean particle size of 5 microns and 90 wt .-% methoxypropyl acetate used. Subsequently 8 g of the starting suspension are diluted with 11% ethyl alcohol to give to get the chrome effect paint.

in the The following will now be described by way of example and not limitation of the present invention the application of the chrome effect paint to produce a chrome effect finish described.

Example 4

First, will In a first step of the painting process, a high-gloss precursor layer is produced. The gloss level is "high glossy", for example, in Meaning of DIN 67530. The paint is a two-component acrylic paint with good weather resistance, high mechanical and chemical resistance and durable Gloss retention used. After the substrate with silicone remover was cleaned, the precursor is applied as usual. Then you leave the Pre-varnish for 2 days. Optionally, however, the precursor can also be baked at 50 ° C for 45 minutes, thereby the flash off time shortened to one day. On the high gloss Vorlackschicht is now applied the chromium effect paint, the Pre-coat layer before applying the chrome effect lacquer layer not is ground between. The chrome effect paint according to the example 3 comes with a spray gun thinly applied in 4 consecutive spray passes, each time between two spray passes a Zwischenablüftzeit maintained for 8 minutes. After applying the chrome effect lacquer layer this is easily polished off with polishing wadding. Subsequently, will applied an intermediate coat. The intermediate varnish was a transparent, colorless water-based paint, namely a water-based basecoat. He is also using spray painting thin though applied opaque. In this case, the intermediate varnish in a single Spritzgang be applied. After applying the intermediate coat is this one for Dried at room temperature for 30 minutes. Finally, it will applied to the intermediate coat a clear coat. The clear coat is a two-component HS clearcoat be based on acrylic. The clearcoat is in a fog and a covering final passage applied and then at 70 ° C for 20 minutes dried.

By the above-described painting process gives a chrome effect paint, as in the 1 is shown. It shows 1 a not to scale cross section through the layer arrangement of chrome effect paint. This has a precoat layer 1 from a high-gloss paint, a dry film thickness of 40 .mu.m to 80 .mu.m. The above arranged the Chromeffektlackschicht 2 has a dry film thickness of 10 .mu.m to 30 .mu.m, while that over the chrome effect lacquer layer 2 arranged intermediate lacquer layer 3 has a dry film thickness of 15 microns to 25 microns. The final clearcoat 4 has a dry film thickness of 30 microns to 60 microns.

Such a chrome effect coating has a very good chromium effect, in particular, even after the application of a clearcoat, the mirror effect is retained or is only slightly reduced in comparison with the condition without clearcoat. On pages It is believed by the Applicant that the waterborne overcoat serves as a barrier to the clearcoat solvents and hardeners and thus prevents significant degradation of the mirror effect. Thus, the chrome effect coating according to the embodiment is well suited to serve for motor vehicles or motor vehicle parts, since it is protected by the intermediate lacquer and the clear coat against environmental and weathering influences.

Example 5

First, will In a first step of the painting process, a high-gloss precursor layer is produced. The gloss level is "high glossy", for example, in Meaning of DIN 67530. The paint is a two-component acrylic paint with good weather resistance, high mechanical and chemical resistance and durable Gloss retention used. After the substrate with silicone remover was cleaned, the precursor is applied as usual. Then you leave the Pre-varnish for 2 days. Optionally, however, the precursor can also be baked at 50 ° C for 45 minutes, thereby the flash off time shortened to one day. On the high gloss Vorlackschicht is now applied the chromium effect paint, the Pre-coat layer before applying the chrome effect lacquer layer not is ground between. The chrome effect paint according to the example 2 comes with a spray gun thinly applied in 3 consecutive spray passes, each time between two spray passes a Zwischenablüftzeit followed by 4 minutes. After applying the chrome effect lacquer layer this is easily polished off with polishing wadding. Subsequently, will in contrast to Example 4 directly a clearcoat on the Chromeffektlackschicht applied. In this case, a water-based clear coat is used.

By the above-described painting process gives a chrome effect paint, as in the 2 is shown. It shows 2 a not to scale cross section through the layer arrangement of chrome effect paint.

This has a precoat layer 1 from a high-gloss paint, a dry film thickness of 40 .mu.m to 80 .mu.m. The above arranged the Chromeffektlackschicht 2 has a dry film thickness of 10 microns to 30 microns, while the final clearcoat 4 ' has a dry film thickness of 30 microns to 60 microns.

Also this chrome effect paint has a very good chrome effect, In particular, even after the application of a clearcoat, the Mirror effect received or is compared to the state without Clear coat only slightly reduced. On the applicant's side, it is assumed that the Water-based clear coat the already applied chrome effect lacquer layer does not trigger or changed in any other way. Thus, the water-based clearcoat will significantly degrade the mirror effect prevented. In this way is the chrome effect paint according to the embodiment good for Serve motor vehicles or motor vehicle parts, as they are by the Intermediate varnish and the clearcoat is protected against environmental and weathering influences.

The The present invention has been explained with reference to exemplary embodiments. These embodiments should by no means be construed as limiting the present Be understood invention.

Claims (48)

Chrome effect paint comprising a suspension aluminum pigment having a mean particle size of smaller or equal to 10 μm, and at least one organic solvent. Chromeffekteffektlack according to claim 1, wherein the aluminum pigment a mean particle size of smaller or equal to 5 microns having. Chrome effect paint according to one of the preceding claims, wherein the aluminum pigment is brilliant. Chrome effect paint according to one of the preceding claims, wherein the aluminum pigment is a non-leafing pigment. Chrome effect paint according to one of the preceding claims, wherein the chromium effect paint has 0.05 to 0.75 wt .-% aluminum pigment. Chromeffekteffekt according to claim 5, wherein the chromium effect paint 0.075 to 0.25 wt .-% aluminum pigment. Chrome effect paint according to one of the preceding claims, wherein the organic solvent at least one of the following substances: Butyl glycol, methoxypropanol, methoxypropyl acetate, ethyl acetate, Isopropyl acetate, ethanol, isopropanol. Chromeffekteffektlack according to claim 7, wherein the organic solvent Ethanol and at least one of the following: butyl glycol, Methoxypropanol, methoxypropyl acetate, ethyl acetate, isopropyl acetate. Chromeffekteffektlack according to claim 8, wherein the organic solvent between 80 and 99.5% by weight of ethanol, based on the total weight of the organic solvent, having. Chrome effect paint according to one of the preceding claims, wherein the chrome effect paint a varnish for a motor vehicle or a motor vehicle part is. Chrome effect paint comprising a precursor layer ( 1 ), which is formed from a high-gloss precursor, a chrome effect lacquer layer ( 2 ), which is formed from a chrome effect paint according to one of claims 1 to 10, an intermediate lacquer layer ( 3 ), which is formed from a transparent colorless water-based paint, and a clearcoat ( 4 ). Chromeffekteffektierung according to claim 11, wherein the precursor layer ( 1 ) has a dry film thickness of 40 microns to 80 microns. Chrome effect paint according to claim 11 or 12, wherein the precursor is an acrylic varnish. Chromeffekteffekt according to one of claims 11 to 13, wherein the chromium effect lacquer layer ( 2 ) has a dry film thickness of 10 microns to 30 microns. Chromeffekteffekt according to one of claims 11 to 14, wherein the intermediate lacquer layer ( 3 ) has a dry film thickness of 15 μm to 25 μm. Chrome effect coating according to one of claims 11 to 15, wherein the clearcoat film ( 4 ) has a dry film thickness of 30 microns to 60 microns. Chrome effect paint according to one of claims 11 to 16, wherein the clearcoat is a two-component acrylic paint. Chrome effect paint according to one of claims 11 to 17, wherein the clearcoat is an automobile clearcoat. Chrome effect paint according to one of claims 11 to 18, wherein the chrome effect paint a paint for a motor vehicle or a motor vehicle part. Chrome effect paint comprising a precursor layer ( 1 ), which is formed from a high-gloss precursor, a chrome effect lacquer layer ( 2 ), which is formed from a chrome effect paint according to one of claims 1 to 10, and a clearcoat film ( 4 ' ), which is formed from a water-based clearcoat. Chrome effect coating according to claim 20, wherein the precursor layer ( 1 ) has a dry film thickness of 40 microns to 80 microns. Chromeffekteffektierung according to claim 20 or 21, wherein the precursor is an acrylic varnish. Chromeffekteffekt according to one of claims 20 to 22, wherein the chromium effect paint layer ( 2 ) has a dry film thickness of 10 microns to 30 microns. Chrome effect coating according to one of claims 20 to 23, wherein the clearcoat film ( 4 ' ) has a dry film thickness of 30 microns to 70 microns. Chromeffekteffekt according to one of claims 20 to 24, wherein the chrome effect paint a paint for a motor vehicle or a motor vehicle part. Painting process comprising the steps: (A) Applying a high-gloss Vorlackschicht, (b) applying a chrome effect paint layer according to one the claims 1 to 10 on the high-gloss precursor layer, (C) Applying an intermediate lacquer layer of a transparent lacquer water-based on the chrome effect lacquer layer, and (d) application a clearcoat layer of a motor vehicle clearcoat on the intermediate lacquer layer. A coating method according to claim 26, wherein the precursor layer at 50 ° C up to 80 ° C for 20 is baked until 45 minutes. A coating method according to claim 26 or 27, wherein the precursor layer before the application of the chrome effect lacquer layer is not ground. A coating method according to any one of claims 26 to 28, wherein the precursor layer before the application of the chromium effect paint layer Bleed for 1 to 3 days can. A coating method according to any one of claims 26 to 29, wherein the chromium effect paint is sprayed on. A coating method according to any one of claims 26 to 30, wherein the chrome effect paint is applied in 2 to 6 consecutive spray passes. A coating method according to claim 31, wherein each between two spray passes a Zwischenablüftzeit from 3 to 10 minutes is provided. A coating method according to any one of claims 26 to 32, wherein the chrome effect lacquer layer is slightly polished after being applied with polishing wadding becomes. A coating method according to any one of claims 26 to 33, wherein the intermediate coat is applied in one spray pass. Painting method according to one of claims 26 to 34, wherein the clearcoat applied in a fog and a covering final passage becomes. Painting method according to one of claims 26 to 35, wherein the clearcoat at 50 ° C. up to 80 ° C for 20 to Dried for 45 minutes. Painting method according to one of claims 26 to 36, wherein the painting process is a painting process for a motor vehicle or a motor vehicle part. Painting process comprising the steps: (A) Applying a high-gloss Vorlackschicht, (b) applying a chrome effect paint layer according to one the claims 1 to 10 on the high-gloss precursor layer, (C) Applying a clearcoat film from a motor vehicle clearcoat water-based on the chrome effect paint layer. A coating method according to claim 39, wherein the precursor layer at 50 ° C up to 80 ° C for 20 is baked until 45 minutes. A coating method according to claim 39 or 40, wherein the precursor layer before the application of the chrome effect lacquer layer is not ground. A coating method according to any one of claims 39 to 41, wherein the precursor layer before the application of the chromium effect paint layer Bleed for 1 to 3 days can. A coating method according to any one of claims 39 to 42, wherein the chromium effect paint is sprayed on. A coating method according to any one of claims 39 to 43, wherein the chromium effect paint is applied in 2 to 6 successive sprays. A coating method according to claim 44, wherein between two sprays a Zwischenablüftzeit of 3 to 10 minutes is provided. A coating method according to any one of claims 39 to 45, wherein the chrome effect lacquer layer after application with polishing wadding is easily polished off. Painting method according to one of claims 39 to 46, wherein the clearcoat applied in a fog and a covering final passage becomes. Painting method according to one of claims 39 to 47, wherein the clearcoat at 50 ° C. up to 80 ° C for 20 to Dried for 45 minutes. Painting method according to one of claims 39 to 48, wherein the painting process is a painting process for a motor vehicle or a motor vehicle part.