JPH03223141A - Production of artificial marble - Google Patents

Abstract

PURPOSE:To obtain the title marble, a colored composite material, easy to color, rich in color tone, ensured to be available stably at all times, by kneading a synthetic resin with glass particles surface-treated with coupling agent to effect embedding the glass particles in the synthetic resin matrix. CONSTITUTION:The surface of glass particles (0.1-10mm in size and 1.43-1.59 in refractive index) is treated with a silicon resin-based coupling agent and kneaded with a synthetic resin to effect embedding the glass particles in the synthetic resin matrix, thus obtaining the objective artificial marble. The glass, with a refractive index of 1.49-1.59, is e.g. silica glass, soda lime glass, lead alkali glass, alumina borosilicate glass, borosilicate glass, being incorporated with a colorant such as CeO2, TiO2, Se, CdS, CoO, Cr2O3, Pt, Fe, Mn or Ni.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for producing artificial marble with a rich color tone, which is composed of amorphous colored glass particles and a synthetic resin.

Conventional technology The diversification of daily life and offices has created a demand for a variety of building materials, but natural marble is a scarce resource and requires manpower at each stage of stone cutting, processing, transportation, construction, etc. ,
Supply is unable to keep up with the recent construction boom.

In order to respond to this social background and various colors, artificial marble is becoming popular.

The conventional manufacturing method for artificial marble is to mix colored pigments and coloring agents with resin as a matrix, and to create a natural stone-like texture (hereinafter referred to as stone-like pattern), natural stone particles are mixed with glass fibers. It was mixed with a reinforcing material consisting of a resin and then injected into a mold. Another method is to use ultrafine particles of 100 μm or less such as aluminum hydroxide or calcium hydroxide as a filler in a resin, add glass fiber reinforcement and a hardening agent to the resin, and then inject it into a mold to create a stone-like pattern. Artificial marble was produced by applying or inserting coloring agents locally.

Problems to be Solved by the Invention With such conventional methods, in order to produce various types of artificial marble with different colors, it is necessary to mix resin in various ways depending on the colored side. However, this method has disadvantages such as complicating production management.

Furthermore, although colorants and pigments are expensive,
There were problems such as discoloration and fading due to UV deterioration, shading power differing depending on the pigment, and the transparency characteristic of marble differing depending on the color and tone.

In addition, ultrafine particulate powders such as aluminum hydroxide, calcium hydroxide, and titanium oxide as fillers are used as fillers.1 The optimum resin curing temperature varies depending on the type and amount of filler, making it difficult to manufacture a wide variety of products. This is extremely problematic in terms of mass production.

Furthermore, the color tone of natural stones that produce stone-like patterns (such as quartz, mica, granite, etc.) varies depending on the production area, or even from loft to loft even in the same production area, which is a fatal defect when used as a building material for large spaces.

The present invention is based on the above-mentioned problem, and an object of the present invention is to provide a method for manufacturing artificial marble that can be easily colored.

Means for Solving the Problems The feature of the present invention is that, before kneading the colored glass and synthetic resin, the colored glass is previously subjected to surface treatment using a coupling agent.

Effect: By using this method, even if colored glasses of different colors or particle sizes are used, mass production is always possible in a stable state. In addition, since synthetic glass is used, it is possible to obtain products of uniform shape, which is advantageous for mass production.
Moreover, the color tone is stable for a long period of time.Furthermore, by significantly increasing the particle size of the colored glass, the heat resistance temperature of the colored composite material is generally 20
It can be improved by ~30°C, and depending on the type of resin and the amount of colored glass added, it will be possible to maintain heat resistance of 220 to 250'C, which will significantly improve the heat resistance limit in system kitchens. .

Example The present invention will be explained in detail using examples.

a) Composition of colored glass Mother glasses used for colored glass include quartz glass, soda glass, soda-lime glass, lead-based alkali glass, alumina borosilicate glass, and borosilicate glass. The typical composition of the mother glass used for colored glass is 5lOa! *,
60-99.5vt%s NatO, 0.1-IG
, KaO is o~svt%, CaO, NgO! *+0-
13wtX1B20sj! , 0 to 13 wt%.

In addition, typical physical properties include a softening point of 720"C to 1 [i7
At 0''C, the specific gravity is 2.20-2.901 and the refractive index is 1.
49 to 1.59 Te, and the transmittance in the visible region of 380 to 780 mμ is preferably 5 to 100%.

Among these, especially when the softening point is 720° C. or lower, it affects the heat resistance of the glass, so it is necessary to use a glass with a softening point higher than this as the mother glass. Further, the specific gravity is preferably in the range of 2.1 to 2.9. The reason for this is that the specific gravity of glass is 2.
If it is larger than 9, only glass particles will be formed at the bottom of the molded body when mixed with resin. On the contrary, 2.
When it is smaller than 1, glass particles are generated only on the surface, and the amount of resin as a binder decreases. For these reasons, it is desirable that the specific gravity is between 2.1 and 2.9.

Next, the coloring agent that colors the above-mentioned mother glass will be described. Table 1 shows typical color-forming metal ion colloids. The colored glass of the present invention can be obtained by adding a coloring agent as shown in Table 1 to the above-mentioned mother glass.

b) Particle size of colored glass The inorganic substances constituting conventional fillers generally have a particle size of 2 to 100 μm, but 0.1 to 10 μm
It is preferable to have a particle size of from the viewpoint of colorability and the strength and heat resistance of the composite material. The particle size of colored glass is 0.1m.
If the thickness is less than m (100 μm), cracks will occur on the surface of the composite material and light will be diffusely reflected on the cracked surface, which will cause problems in terms of colorability and stone-like patterning, which is not preferable. Further, it is not preferable to add colored glass particles of 100 .mu.m or less because ultrafine particles of 100 .mu.m or less change the curing time and degree of curing when cured with a resin depending on the type of colored glass. Although crushed particles were used in the examples, particles of a predetermined shape may be obtained directly from glass without crushing.

In addition, the particle size structure of the crushed grains of 0.1 to 105111 is 0.
．． It is important to maintain a balance between large, medium, and small particle sizes within the range of 1 to 10 mm. However, depending on the intended use,
It is also possible to change the particle size configuration.

Table Colored Color C) Surface Treatment of Colored Glass The activity of the fractured surface of colored glass varies depending on the type of color, concentration, and particle size difference, so it is important to maintain the bonding strength with the resin used stably over a long period of time. For this purpose, the surface is previously treated with a silicone resin-based coupling agent and then kneaded with a resin. Since this surface treatment effectively covers the colored glass, the resin and curing curing time, curing temperature, air bubbles in the composite material, aesthetic appearance of the composite material, etc. are improved.

d) Resin for color composite materials Various resins such as epoxy, urethane, acrylic, melamine, phenol, styrene, and unsaturated polyester resins can be arbitrarily selected depending on the purpose of use.

d) Other fillers and reinforcing materials It is possible to produce color composite materials under the conditions described in a) to C) of this article, but depending on the purpose of use, it is possible to improve the mechanical strength of the color composite material. It is also possible to partially add known glass fibers or general fillers for the purpose of adjusting the neutral color of the color composite material.

<Example 1> 1) Unsaturated polyester resin...20 parts by weight 2) Soda lime glass (transparent, particle size 1-5, softening point near 30°C
, refractive index: 1.52)...15 parts by weight 3) Soda lime glass (pink, particle size l~5cm, softening point near 30°C
1 refractive index: 1.52, containing Se)...5 parts by weight4)
Soda lime glass, brown, particle size 1~5 mm (softening point, refractive index same as above, contains Fe, Mn)...2 parts by weight 5) Catalyst (
Nippon Oil & Fats Co., Ltd.: Vermec N)...0.2 parts by weight 2) to 5) glasses were previously immersed in a coupling agent (Shin-Etsu Chemical, KBM-503) for surface treatment.
1) to 5) were kneaded, and the kneaded mixture was poured into a mold and cured in a curing chamber at 60° C. for 6 hours to obtain a color composite material with a thickness of 20 cm.

<Example 2> l) Unsaturated polyester resin (Dainippon Ink & Chemicals Co., Ltd.
Polylye Co., Ltd.) TP-237...20 parts by weight 2) Borosilicate glass (transparent, particle size 1-10+am, softening point near 9)
5°C, refractive index: 1.49)...15 parts by weight 3) Borosilicate glass (cobalt blue, particle size 1-11-1O same as above glass containing 0.5 wt% Co)...5 parts by weight 4) Boron Silicate glass (brown, particle size 1-11-1O same glass as above, Fe,
Addition of 1 to 3 wt% Mn)...5 parts by weight 5) Catalyst (same as above) Glasses from 2) to 4) were previously immersed in a coupling agent (Shin-Etsu Chemical, KBM-503) and subjected to surface treatment. ,
1) to 5) were kneaded, the kneaded mixture was poured into a mold, and cured for 5 hours in a curing chamber at 60°C to obtain a color composite material with a thickness of 20 mm.

<Example 3> 1) Acrylic syrup consisting of 25% methyl methacrylate polymer and 75% methyl methacrylate having a solution viscosity of 1 voice at 25°C...20 parts by weight 2) Soda lime glass (black, particle size: l~5III01 Softening point near 3
0°C, Fe, Mn, Go, Cu, 1-3vt
Contains X) - 15 parts by weight 3) Catalyst (benzoyl peroxide, etc.)
・Prepare 0.2 parts by weight of glass, pre-immerse the glass in 2) in a coupling agent (Shin-Etsu Chemical, KBM-503) and perform surface treatment, then mix 3) with the above mixture. Pour into a mold and heat press at 100℃ for 20 minutes to a thickness of 20℃.
■A colored composite material was obtained.

In Examples 1 to 3, specific color composite materials were prepared, but
The color, stone-like pattern, depth, and luster are far superior to those using natural stone, resulting in a wonderful workmanship. When this surface was polished using a puff polishing machine, a composite material with a color different from that of natural stone was obtained, which further increased the sense of luxury and quality.

In Examples 1 to 3, examples were explained using an acrylic resin and an unsaturated polyester resin as representative resins, but similar color composite materials were obtained using other resins.

Effects of the Invention As described above, according to the production method of the present invention, it is possible to constantly and stably supply a color composite material with rich color tone.

Claims (5)

[Claims] (1) Before kneading with the synthetic resin, the surface of the glass is treated with a coupling agent, and the glass is kneaded with the synthetic resin to obtain glass with a particle size that allows the presence of particles to be practically confirmed from the synthetic resin. A method for producing artificial marble characterized by embedding it in a matrix composed of: (2) The method for producing artificial marble according to claim 1, wherein the coupling agent is a silicone resin. (3) the glass is quartz glass, soda lime glass, lead-alkali glass, alumina borosilicate glass, or borosilicate glass having a physical property of a refractive index (n) of 1.49 to 1.59;
2. The method for producing artificial marble according to claim 1, further comprising a coloring agent. (4) Colorant is CeO_2, TiO_2, Se, Cd
S, CoO, Cr_2O_3, pt, Fe, Mn, Ni
The method for producing artificial marble according to claim 1 or 3, characterized in that: (5) The method for producing artificial marble according to claim 1 or 3, wherein the glass particles have a particle size of 0.1 to 10 mm.