JPS5837047A - Amino resin molding material - Google Patents

Abstract

PURPOSE:To provide an amino resin molding material consisting mainly of an amino resin, containing a colorant and a specified release agent and producing molding products in deep and bright colors. CONSTITUTION:The molding material consists mainly of an amino resin and contains a release agent and a colorant. The release agent is a metallic salt with a melting point of 50-120 deg.C, pref. 60-100 deg.C (e.g., zinc oleate, calcium oleate and zinc stearate). Conventional calcium stearate or zinc stearate is not suitable because of its higher melting point. The amino resin and the colorant may be the same as conventional ones. The molding material is obtained by adding necessary additives to the resin.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an amino resin molding material from which a molded article with a single clear deep color can be obtained.

Amino fat is a general term for resins obtained by the addition condensation reaction of a substance having an amino group and formaldehyde, and modified resins thereof, such as urea resin.

Includes melamine resin, guanamine resin, phenol-modified melamine resin, etc. This amino resin is relatively inexpensive, has high surface hardness, and has sufficient mechanical strength for commercial use.
IL also has excellent electrical properties, water resistance, and chemical resistance. Therefore, it has been widely used as the main raw material for molding materials for making molded products such as tableware, daily household goods, and machine parts.

Generally, for molded products such as tableware and daily household items.

Items with deep and vivid colors are especially summarized. However, until now, it has not been possible to obtain such a product using an aluminum/resin molding material. 1 Coloring agent (
There is also the problem of increasing the content of #i (colorant), and even if a large amount of colorant is used, the color will fade.

The inventor conducted repeated research in order to obtain a dark-colored amino molded product. As a result, we came to the conclusion that there may be a problem with the formulation. Therefore, we investigated various molding agents and found that if a mold release agent with a low melting point was used, the dark color i)
Chita has shown that it is possible to prevent the elution of colorants in molded products.

The present invention has now been completed.In other words, the amino resin molding material according to the present invention is a molding material that has a main component of Akinoki SIt and contains a molding agent and a coloring agent, wherein the mold release agent is % mold refers to a metal soap with a melting point of 50 to 120°C. The present invention will be explained in detail below.

The main component is the same amino resin as before.

Further included are release agents and colorants. The type of coloring agent may be the same as conventional ones, but as a mold release agent, one point is 50 to 120.
It is necessary to use metal soap at ℃. Conventionally, either calcium stearate (melting point 180° C.) or zinc stearate (melting point 140° C.) has been used as a release agent. Against this.

The amino resin molding material according to the present invention includes zinc oleate (melting point 78°C), calcium oleate (melting point 84°C), and calcium oleate (melting point 84°C).
), zinc laurate (8 points 80°C), melting point 50-1
Metal soap at 20°C (preferably 60-100°C) is used.

By using such a lid release agent, colored steel will not be eluted and molded products with a deep and vivid color will be produced, resulting in a strong amino resin molding material.

The reason for this is not clearly known, but it is thought that at the temperature during molding, the bath is rounded so that the 9 + EUI agent envelops the 1 colorant and prevents elution.

Similar to the conventional molding material 4, various additive materials such as those exemplified below may be added to the 7 mm molding material according to the present invention depending on the purpose of use and other requirements. For example, wood flour,
These include fillers such as pulp, hardening agents such as citric acid, ^-uric acid, and phthalic acid, and warming agents such as water-glycerin.

How to make molding materials from these raw materials.

By normal methods etc.

The amino resin molding material according to the present invention has the above-described structure, and by using the same, it is possible to obtain a molded article with one clear dark color.

Next, an embodiment will be described together with a conventional example.

The resin molding materials of Example 1.2 and Conventional Example 1.2 were obtained in the same manner.

(Example 1) Bulb 40 parts Phthalic acid 0.5 m Zinc oleate 1 part Red colorant 2 parts The above raw materials were mixed to obtain an amine tree WiI (melamine tree Mkj) molding material.

(5J!Example 2) Resin amount 60% by weight Uria globulin 1800 parts Ammonium chloride 0.3 m Sodium hydroxide L), l ms Pal
Raw materials such as PU 270s were mixed and dried to obtain a dry product. Next, 1 part of zinc laurate and 2 parts of a red colorant were added to 100 parts of this dried product, and f-lumin milling was performed to obtain an amino tree & (area resin) molding material.

(Conventional Example 1) In Example I, an amino resin (melamine resin FiI) molding material was obtained using the same amount of zinc stearate for the zinc oleate paste and in the same manner as above.

(Conventional Example 2) In Example 2, the same amount of zinc stearate was used for the zinc laurate paste, and the rest was carried out in the same manner to obtain a resin (area resin) molding material.

Dark colored amino resin molded products were made using the amino resin molding materials of Example 1.2 and Conventional Example 1.2, and a colorant elution test was conducted.

The molding conditions were a molding pressure of 100 kg/cm'', a molding temperature of 140° C., and a pressing time of 60 seconds.

The dissolution test was carried out by rubbing the surface of the sample molded article with a white cloth moistened with water. The result is.

In all of the molded products made using the molding materials of Examples, the white cloth was not colored and no colorant was eluted. On the other hand.

Claims (2)

[Claims] (1) Aminoki ri! A molding material containing a mold release agent and a coloring agent as a main component, wherein the S-type agent is
0-120℃ metal soap/
Resin molding material. (2) The resin molding material according to claim 1, wherein the mlAm1 agent comprises at least one selected from zinc oleate, calcium oleate, and zinc laurate.