JPH05214115A - Production of decorative molding - Google Patents

Abstract

PURPOSE:To enable the obtaining of a decorative molding, capable of forming a complicated pattern with depth and having high natural stony feeling. CONSTITUTION:The objective decorative molding is obtained by blending an uncured liquid curable resin such as an unsaturated polyester resin width a colorant, curing the resultant blend, pulverizing the cured blend, preparing the first pulverized resin particle having about 200mum to 5mm particle diameter, blending the prepared particle with a transparent curable resin liquid such as an unsaturated polyester resin, curing the obtained blend, pulverizing the cured blend, preparing the second pulverized resin particle having about 500mum to 10mm particle diameter, further blending 100 pts.wt. transparent curable resin liquid such as an acrylic syrup with 10-150 pts.wt. resultant second pulverized resin particle, curing and molding the obtained blend.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention is applicable to artificial stones, terrazzoes,
Regarding the manufacturing method of decorative molded products used for the surface layer of molded products such as fiber reinforced resin molded products that have the appearance similar to natural stone such as granite and marble, crush the cured product of colored resin or uncolored resin 1 crushed resin particles, then, the first crushed resin particles were mixed with a transparent curable resin liquid, and after curing this, the cured product was crushed to make second crushed resin particles, and then this A decorative molded product with a complex and deep feeling and a natural stone texture is obtained by curing and molding a mixture of the second crushed resin particles in a transparent curable resin liquid to form a decorated molded product. It was made possible.

[0002]

2. Description of the Related Art Heretofore, a so-called artificial marble manufacturing method has been known as a specific example of the method for manufacturing such a decorative molded article. As an example thereof, a polymerizable resin liquid in which an acrylic resin such as polymethylmethacrylate is dissolved in an acrylate ester monomer such as methylmethacrylate, an inorganic filler such as aluminum hydroxide, and resin particles obtained by crushing, etc. It is a method of compounding, curing and molding the compound, and patterning. The resin particles are obtained by adding an inorganic filler such as aluminum hydroxide to an uncured liquid unsaturated polyester resin, and a colorant if necessary, followed by curing, and crushing the cured product. , Several or more different in transparency, shape, etc. are appropriately combined and blended in the polymerizable resin liquid.

However, in such resin particles, since all the individual particles are uniformly colored,
Even if it was dispersed in the above-mentioned polymerizable resin liquid, only a single pattern could be formed, and the resulting decorative molded product lacked in natural stone texture.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a decorative molded product which enables complex and deep patterning and has a high natural stone texture.

[0005]

[Means for Solving the Problems] The problem is to crush a colored resin or non-colored resin cured product into first crushed resin particles, and then to mix the first crushed resin particles with a transparent curable resin liquid. After curing it, the cured product is crushed to make second crushed resin particles, and then the second crushed resin particles are mixed with a transparent curable resin liquid, and the mixture is cured and molded to give a decorative molded product. Will be solved.

The present invention will be described in detail below. First, the first crushed resin particles will be described. In the case of a colored resin, the first crushed resin particles are usually opaque particles in which the entire particles are uniformly colored, and the uncured liquid curable resin is mixed with a colorant if necessary, and then cured. It is obtained by crushing a colored resin or a non-colored resin cured product.

As the uncured liquid curable resin, unsaturated polyester resin, epoxy resin, phenol resin, melamine resin, urea resin, a mixture of these resins and acrylic syrup, a mixture thereof, or the like is used.

The colorant is used to make the uncured liquid curable resin have a desired color tone, and TiO ₂ , Fe ₂ O ₃ , yellow toner, brown toner, blue toner, green toner and the like are used. The most suitable one is selected according to the uncured liquid curable resin with which the colorant is blended. The blending amount is determined by the degree of coloring of the first crushed resin particles, and is about 0.1 to 5 parts by weight with respect to 100 parts by weight of the uncured liquid curable resin.

A filler may be added to the uncured liquid curable resin in order to adjust the transparency of the first crushed resin particles. The filler has an average particle diameter of about 5 μm to several 1
Aluminum hydroxide, magnesium hydroxide, calcium carbonate, glass filler or the like having a diameter of about 00 μm is used.
The compounding amount is about 100 to 200 parts by weight with respect to 100 parts by weight of the uncured liquid curable resin. Generally, if the amount is more than 200 parts by weight, the first crushed resin particles tend to become opaque, and if it is less than 100 parts by weight, the specific gravity of the first crushed resin particles becomes too small, and the first crushed resin particles are mixed. It often does not disperse properly in the transparent curable resin liquid.

A curing accelerator, a radical curing agent or the like is used to cure the uncured liquid curable resin. Cobalt naphthenate or the like is used as the curing accelerator, and is added in an amount of about 0 to 1 part by weight based on 100 parts by weight of the uncured liquid curable resin. An organic peroxide or the like is used as the radical curing agent, and is added in an amount of about 0.5 to 2 parts by weight with respect to 100 parts by weight of the uncured liquid thermosetting resin.

Such an uncured liquid curable resin composition is molded into a sheet by a conventional method and cured to obtain a colored resin or a non-colored resin cured product. Then, the colored resin or non-colored resin cured product is crushed. For this crushing, first, coarse crushing is performed using a hammer or the like, and further crushing is performed using a roll crusher, hammer mill, jaw crusher, or the like, and then particles having a particle diameter of about 200 μm to 5 mm are classified, and first crushed resin particles It is said that.

Next, the second crushed resin particles will be described. The second crushed resin particles, the first crushed resin particles are blended in a transparent curable resin liquid by appropriately combining at least one of different color tones, transparency, shape, etc., preferably two or more, and After being cured, it is obtained by crushing this cured product.

As the transparent curable resin liquid containing the first crushed resin particles, unsaturated polyester resin, acrylic syrup, etc., or a mixture thereof is used. The mixing amount of the first crushed resin particles is about 10 to 150 parts by weight, preferably 50 parts by weight, based on 100 parts by weight of the transparent curable resin liquid.
It is about 100 parts by weight. When it is less than 10 parts by weight, it is difficult to obtain a natural and deep pattern in the second crushed resin particles, and when it exceeds 150 parts by weight, a mixture of the first crushed resin particles and the transparent curable resin liquid in which the first crushed resin particles are mixed is used. There is an inconvenience that it cannot be molded due to its high viscosity.

The transparent curable resin liquid containing the first crushed resin particles may be mixed with the same filler as that used for obtaining the first crushed resin particles as long as the transparency is not impaired. Good. A coloring agent may be added as long as the transparency is not impaired. This colorant is for making the transparent curable resin liquid containing the first crushed resin particles into a desired color tone, and the same one as used for obtaining the first crushed resin particles is used. However, the most suitable one is selected according to the transparent curable resin liquid with which the first crushed resin particles are mixed.

For curing the transparent curable resin liquid containing the first crushed resin particles, the same curing accelerators and radical curing agents as those used for the uncured liquid curable resin are used. Each of the above transparent curable resin liquids 100
About 0 to 1 part by weight and 0.5 to 2 parts by weight are added with respect to parts by weight.

Such a transparent curable resin composition is formed into a sheet and cured by a conventional method to give a cured product. Then, the cured product is crushed. This crushing is first roughly crushed using a hammer or the like, and further crushed using a roll crusher, a hammer mill, a jaw crusher, or the like, and then classified into particles having a particle diameter of about 500 μm to 10 mm. It is said that.

Such second crushed resin particles are contained in a state where one or more kinds of the first crushed resin particles are substantially uniformly dispersed inside each transparent resin particle. The second crushed resin particles are used for patterning the decorative molded article as described later, but the particles themselves, that is, the patterning particles themselves, are patterned.

Next, a decorative molded product obtained by using the second crushed resin particles will be described. This decorative molded product is obtained by curing and molding the second crushed resin particles, which are mixed in a transparent curable resin liquid by appropriately combining one or more kinds, preferably two or more kinds having different color tones, transparency, shape, etc. Is obtained. As the transparent curable resin liquid with which the second crushed resin particles are mixed, acrylic syrup, unsaturated polyester resin and the like are used.

The content of the second crushed resin particles is about 10 to 150 parts by weight, preferably about 50 to 100 parts by weight, based on 100 parts by weight of the transparent curable resin liquid. 10
If it is less than 1 part by weight, the decorative molded article does not have the appearance similar to the natural stone texture, and if it exceeds 150 parts by weight, the viscosity of the mixture of the second crushed resin particles and the transparent curable resin liquid in which the second crushed resin particles are blended is increased. This is because it cannot be molded high.

The transparent curable resin liquid containing the second crushed resin particles may contain a filler as long as the transparency is not impaired. As the filler, the same ones as used above are used. As a material for curing the transparent curable resin liquid containing the second crushed resin particles, the same curing accelerators and radical curing agents as those used previously are used, and the transparent curable resin liquid 100 is used in each case. About 0 to 1 part by weight and 0.5 to 2 parts by weight are added with respect to parts by weight.

The transparent curable resin liquid containing the second crushed resin particles has a higher degree of transparency than the cured product of the transparent curable resin liquid containing the first crushed resin particles. Preferably, if the transparency is low, the color tone, transparency, shape, etc. of the second crushed resin particles dispersed in the cured product of the transparent curable resin liquid containing the second crushed resin particles are difficult to appear, It is not possible to give the desired pattern to the decorative molded product.

Such a transparent curable resin composition is poured into, for example, a square mold, cured and molded, and then taken out from the mold to obtain a decorative molded product. The surface can be subjected to polishing to produce a pseudolite such as so-called marborone. Further, the transparent curable resin composition is applied to the inner wall of a mold, and after curing, a fiber reinforced resin molded product is formed by a usual hand layup method or a spray up method, and the gel coat layer is a decorative molded product. It is possible to obtain a fiber-reinforced resin molded product having Further, the above-mentioned transparent curable resin composition can be applied to the surface of a desired object and cured to form a decorated molded product, or it can be poured into a mold and cured and molded to form a decorated molded product.

In the decorative molded product thus obtained, the second crushed resin particles are dispersed in the transparent resin cured product. As described above, the second crushed resin particles have various colored or uncolored first crushed resin particles dispersed therein almost uniformly. Therefore, as a whole, the decorated molded product is in a state in which the lump-shaped portions in which the first crushed resin particles are uniformly dispersed are dispersed, and the first crushed resin particles are locally and uniformly dispersed. Therefore, the pattern becomes complicated and a deep molded article having a high natural stone texture can be obtained. Further, if the transparency of the cured product of the transparent curable resin liquid in which the second crushed resin particles are blended is higher than the transparency of the cured product of the transparent curable resin liquid in which the first crushed resin particles are blended, decorative molding The presence of the second crushed resin particles themselves is visually recognized in the cured product of the transparent resin, and as a result, the three-dimensional pattern is emphasized and the depth is more fully revealed.

[0024]

As described above, the method for producing a decorative molded product of the present invention is to crush a colored resin or a non-colored resin cured product into first crushed resin particles, and then to crush these first crushed resin particles. After being mixed with a transparent curable resin liquid and then cured, the cured product is crushed to produce second crushed resin particles, and then the second crushed resin particles are blended with a transparent curable resin liquid. Since it is cured and molded into a decorative molded product, it is possible to form a complex and deep pattern compared to the conventional decorative molded product manufacturing method, and a decorative molded product with a high natural stone texture can be obtained. There is an advantage that.

Claims (2)

[Claims] 1. A cured resin product is crushed into first crushed resin particles, and the first crushed resin particles are then blended with a transparent curable resin liquid to cure it, and then the cured product is crushed. To produce a second crushed resin particle, and then, the second crushed resin particle is mixed with a transparent curable resin liquid to be cured and molded to give a decorative molded article, which is a method for producing a decorated molded article. .. 2. The transparency of the cured product of the transparent curable resin liquid containing the second crushed resin particles is higher than the transparency of the cured product of the transparent curable resin liquid containing the first crushed resin particles. The method for producing a decorated molded article according to claim 1.