JPH11140206A - Coated olefinic resin molded product and coating of oleffnic resin molded product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject molded product capable of being coated with a highly durable coating by coating an olefinic resin molded product with a solution type primer layer-forming agent to form a primer layer and subsequently forming a coating layer on the surface of the primer. SOLUTION: This molded product is obtained by coating (B) a solvent type primer layer-forming agent containing a maleic anhydride-modified polyolefin as a main component on the surface of (A) a new or reclaimed olefinic resin molded product to form a primer layer, and subsequently coating the surface of the primer layer with (C) an acrylic resin coating to form a colored coating film. When the component C is coated on the surface of the component A not having polarity, the component B is used. The maleic anhydride-modified polyolefin as the main component of the component B is compatible with both the olefinic resin as the main component of the component A and the component C forming the outermost layer, and is integrated with both the olefinic resin and the component C after the evaporation of the solvent. Thereby, the tough coating film comprising the component C is formed on the component A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an olefin resin molded article obtained by applying a color coating to a surface of an olefin resin molded article such as polyethylene or polypropylene by post-processing, and an olefin resin molded article. The method of painting.

[0002]

2. Description of the Related Art Since an olefin resin such as polyethylene has no polarity, even if such a molded article is coated, it is not durable, and the coating film peels off in a short period of time. Some coatings were difficult to apply. for that reason,
In order to provide a color to a molded article made of such an olefin-based resin as a raw material, a colored product is obtained from a raw material to which a pigment is added in advance.

[0003]

However, since the product obtained from the raw material to which the pigment is added in advance has the color of the raw material itself forming the molded article, even if there is no phenomenon such that the coating is peeled off, such a phenomenon is not caused. Since a molded article using a colored raw material can produce only a single color, the product is limited to a single color, and a single molded article cannot have many color patterns.

In order to obtain products of various colors,
It is necessary to make raw materials with various pigments added,
Even in this case, the product itself is of a single color, and after all, it is merely provided as a single-color product of a different color, and such a colored raw material is generally produced in a mass production facility. However, producing raw materials of various colors requires inefficient work, and inevitably increases the cost.

The present invention has been made in view of the above problems, and an object of the present invention is to make it possible to apply a highly durable coating to an olefin resin molded article by post-processing. It is still another object of the present invention to provide an olefin-based resin molded article coated with a single product in a number of colors to provide a colorful pattern, and a method of coating an olefin-based resin molded article.

[0006]

In order to achieve the above object, a coated olefin resin molded article and a method for coating an olefin resin molded article according to the present invention are provided on an olefin resin molded article with an anhydrous surface. A solvent-based primer layer forming agent containing maleic acid-modified polyolefin as a main component is applied to form a primer layer, and an acrylic resin paint is applied to the surface of the primer layer to provide a colored coating film. Become.

In the present invention, a color pattern appears on the surface of the molded article by applying a large number of different colors of acrylic resin paints to the surface of the primer layer.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a solution-type primer-forming agent in which a solute mainly composed of a maleic anhydride-modified polyolefin is dissolved in a solvent on the surface of a molded product of a newly or regenerated olefin resin. Then, a primer layer is formed, and an acrylic resin paint containing a desired pigment is applied to the surface of the primer layer to form a colored coating film.

In the present invention, a color pattern appears on the surface of the molded article by applying a large number of different colors of acrylic resin paints on the surface of the primer layer.

[0010] The present invention relates to a method for applying an acrylic resin to the surface of a molded article of a non-polar olefin resin such as polyethylene or polypropylene by applying a solute mainly composed of a maleic anhydride-modified polyolefin as a multicomponent solvent. Since a solvent-type primer layer forming agent dissolved in
The maleic anhydride-modified polyolefin is compatible with both the olefin resin, which is the main material of the molded product, and the acrylic resin coating that forms the outermost layer, and becomes integral after the solvent evaporates. A tough coating film of acrylic resin paint is obtained on the molded product.

FIG. 1 is a front view, partially in section, of a bracelet colored according to the present invention. The bracelet 1 is formed from recycled polyethylene as a columnar molded product having a smooth surface, and the surface of the bracelet 1 is made of anhydrous. Solution type primer in which a solute mainly composed of maleic acid-modified polyolefin is dissolved in a solvent.
A primer is formed by applying a forming agent, and a body portion of the wheelchair 1 is coated on the surface of the primer layer with, for example, a blue-based acrylic resin paint to form a blue coating portion 1a. For example, the upper portion is provided with a red paint portion 1b applied to two line patterns with a red acrylic resin paint, and the body of the car stop 1 is given a blue color and the upper portion is provided with two red colors. It is formed by giving a linear color. Then, the bogie 1 is inserted into a foundation 3 embedded and installed in the underground 2 and installed upright.

FIG. 2 is a front view, partially in section, of a fence colored in accordance with the present invention. Fence 11 is made of recycled polyethylene.
The support 12 and the crosspiece 13 are formed as a bark-shaped molded product having irregularities on the surface by heating and pressing in a mold. A solution-type primer-forming agent in which a solute mainly composed of maleic anhydride-modified polyolefin is dissolved in a solvent is applied to the surface of each of the columns 12 and the rungs 13 to form a primer layer. And, on the surface of the primer layer applied to the crosspiece 13, for example, a brown acrylic resin paint suitable for the color of the tree is applied to give a color suitable for the pseudo wood. A crossbar 13 is connected between the plurality of columns 12, and the plurality of columns 12 are inserted into the foundation 3 embedded and installed in the underground 2 to be installed upright, thereby constructing the fence 11 of the artificial tree.

[0013]

Example 1 In Example 1, a molded product of recycled polyethylene was molded in a mold into a single body having a bark-like shape formed on a heating and pressing surface in a mold. Next, after washing the surface of the molded article to be a single compact with a solvent, the solute containing maleic anhydride-modified polyolefin as a main component is washed with a solvent.
A primer layer-forming agent obtained by dissolving 0 part by weight of 86.0 parts by weight of hydrocarbon and 4.0 parts by weight of ethylene was applied, and allowed to stand naturally for about 5 minutes to form a primer layer. Next, a two-component acrylic resin paint is applied to the surface of the primer layer, allowed to stand naturally for about 5 minutes, and then heated and dried in an atmosphere at a temperature of about 70 ° C. for about 30 minutes to obtain a regenerated polyethylene single article. A surface-coated column was obtained.

[0014]

Example 2 In Example 2, a mixture of recycled polyethylene and a floc-like glass fiber reinforced plastic obtained by crushing a reaction-cured so-called glass fiber reinforced plastic molded product was heated and pressed in a mold. Then, a columnar molded product having a bark shape was prepared.
Next, the surface of the molded article to be hybridized was washed with a solvent in the same manner as in Example 1, and then 10 parts by weight of a solute containing maleic anhydride-modified polyolefin as a main component was mixed with 86.0 parts by weight of hydrocarbon. And a primer layer forming agent dissolved in 4.0 parts by weight of ethylene, and allowed to stand naturally for about 5 minutes to form a primer layer. Next, a two-component acrylic resin paint is applied to the surface of the primer layer and left standing for about 5 minutes and then dried by heating for about 30 minutes in an atmosphere at a temperature of about 70 ° C. A column coated with a reinforced plastic hybrid surface was obtained. The physical properties of each of the two column-coated surface bodies of Example 1 and Example 2 were tested, and the results shown in Table 1 were obtained.

[0015]

[Table 1]

In Table 1, it can be understood that the coating of the single-piece molded article which becomes the recycled polyethylene of Example 1 has no abnormality in all the test items and the physical properties of the coating film are excellent. Further, the coating of the molded article of the hybrid of the recycled polyethylene and the glass fiber reinforced plastic in Example 2 was such that a minute peeling of the coating film was observed in the weather resistance test.

For comparison, a single product was prepared by replacing the recycled polyethylene of Example 1 with recycled propylene, and a single product was prepared by replacing the recycled polyethylene and glass fiber reinforced plastic of Example 2 with new polyethylene and new propylene. For pillars with surface coating with hybrids,
In the same test as above, it was found that the recycled polyethylene had the best physical properties. However, the physical properties of the coating film of the new polyethylene and the new propylene were slightly inferior to those of the recycled polyethylene.

[0018]

Since the present invention has the above-described structure, the following effects can be obtained. The maleic anhydride-modified polyolefin, which is the main component of the solvent-type primer-layer molding agent, is compatible with both the olefin resin, which is the main material of the molded product, and the acrylic resin paint that forms the outermost layer, and the solvent Are integrated after the volatilization, and a tough coating film of an acrylic resin paint is obtained on the olefin resin molded product. Therefore, a highly durable coating can be applied to the surface of the olefin resin molded product.

Further, according to the present invention, a colored coating film can be formed by post-processing on the surface of a molded article of an olefin resin, so that it is necessary to add a pigment to the material constituting the molded article in advance. No, and even if the regenerated product of the olefin resin to which the pigment has already been added, the recycled material is
It is possible to express a color different from the color that is previously provided, and if the pillar shown in the above embodiment is constructed as a car stop or as a false wooden fence on a road or a park, from the data in Table 1 It can be estimated that the paint is not damaged or discolored for more than 20 years in a natural environment.

In addition, the present invention has a remarkable effect of coating recycled polyethylene, and has a great effect when applied to the coating of products produced by recycling various kinds of polyethylene waste.
Furthermore, according to the present invention, instead of coloring the raw material,
Since the surface of the molded article is colored with a coating film, a color pattern of many colors can be applied to the molded article by using a combination of paints of different colors. This is advantageous in that it can be easily applied to molded products having surface irregularities such as bark.

[Brief description of the drawings]

FIG. 1 is a front view showing a vehicle stop according to the present invention in a partial cross section.

FIG. 2 is a front view showing the fence of the present invention in a partial cross section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wheel stop 1a Blue painted part 1b Red painted part 11 Fence 12 Prop 13 Rail

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI C09D 5/00 C09D 5/00 D 123/26 123/26 133/06 133/06

Claims (2)

[Claims] 1. A primer layer forming agent comprising a maleic anhydride-modified polyolefin as a main component is applied to the surface of an olefin resin molded article to form a primer layer, and an acrylic resin layer is formed on the surface of the primer layer. A coated olefin resin molded article characterized by being provided with a colored coating film by applying a resin paint. 2. A primer layer forming agent comprising a maleic anhydride-modified polyolefin as a main component is applied to the surface of an olefin resin molded article to form a primer layer, and an acrylic resin layer is formed on the surface of the primer layer. A method for coating an olefin resin molded article, characterized by applying a resin paint.