JPH06200120A - Amino resin molding material - Google Patents

Abstract

PURPOSE:To obtain an amino resin molding material capable of providing moldings having transparency and metallic appearance in relation to the amino resin molding material used for wiring tools, electrical appliances, kitchen utensils, household products and sundries. CONSTITUTION:This amino resin molding material is characterized by impregnating cellophane with an amino resin, drying the impregnated cellophane and then adding a curing agent, a mold release agent, a metallic flake and/or metallic fiber and, as necessary, a colorant thereto.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an amino resin molding material for use in wiring products, electric appliances, kitchen appliances, household products, miscellaneous goods, etc., particularly molded products requiring a transparent metallic tone. .

[0002]

2. Description of the Related Art Conventionally, molded products made of amino resins such as urea resin and melamine resin are useful because they are hard and have high stain resistance, but it is not possible to obtain a transparent metallic product. It was

[0003]

As described in the prior art, it is not possible to obtain a transparent metallic-like molded product with an amino resin molding material. The present invention has been made in view of the above problems in the prior art, and an object of the present invention is to provide an amino resin molding material from which a transparent metallic-like molded product can be obtained.

[0004]

According to the present invention, cellophane is impregnated with an amino resin, dried, and then a curing agent, a release agent, metal flakes and / or metal fibers, and if necessary, a coloring agent is added. The above-mentioned object can be achieved because of the characteristic amino resin molding material, and the present invention will be described in detail below.

As the amino resin used in the present invention, all amino resins such as urea and melamine can be used. For the amino resin, for example, 1 to 3 mol of formaldehyde and PH 7 to 7 mol per 1 mol of the amino compound such as urea and melamine. 12
It is obtained by reacting at 50 to 100 ° C. under The cellophane as the filler and the reinforcing material impregnated with the amino resin is not particularly limited, and cellophane in general can be used. The addition amount of cellophane is 20 to 50 of amino resin.
Weight% (hereinafter simply referred to as%) is preferable. That is, if it is less than 20%, the drying property is deteriorated, and if it exceeds 50%, the flow during molding tends to be small and the moldability tends to be deteriorated. Phthalic anhydride or the like is used as a curing agent, and amino resin 100
It is preferable to add 0.01 to 3 parts by weight to parts by weight (hereinafter simply referred to as “parts”). As the release agent, fatty acid, fatty acid metal salt, wax or the like is used, and it is 0.0 to 100 parts of resin.
It is preferable to add 1 to 5 parts. As the metal flakes and metal fibers, aluminum, copper, gold, silver, brass, stainless steel flakes and fibers are used, and it is preferable to add 0.05 to 20% of the total amount of flakes and / or fibers.
That is, if it is less than 0.05%, it is difficult to obtain a metallic tone.
This is because if it exceeds%, it is difficult to be transparent. Further, a colorant is added if necessary. Thus mix the above materials,
Amino resin molding material is obtained by mixing, kneading, pulverizing, and further granulating as necessary. Regarding the timing of adding metal flakes and metal fibers, metal flakes and metal fibers are added to clarify the metallic tone. It is preferable that after mixing, mixing, kneading, and pulverizing only the materials except the above, metal flakes and metal fibers are added and mixed to obtain a molding material. The molding material is molded by compression molding, transfer molding, injection molding or the like.

The present invention will be described below based on examples.

[0007]

Example 1 1.6 mol of formaldehyde was added to 1 mol of melamine, and 40 parts of cellophane and 0.3 part of phthalic anhydride were added to 60 parts of a melamine resin obtained by reacting at 85 ° C. for 1 hour with PH9. After blending, mixing, kneading, and pulverizing zinc stearate (0.05 parts), 1 part of aluminum flake (Fukuda Machine Co., Ltd., Astroflakes) was added to 100 parts of the pulverized product and mixed to obtain a melamine resin molding material. It was Next, using a transfer molding machine, the molding material is
Molding was carried out at a mold temperature of 145 ° C. and a molding pressure of 100 kg / cm ² curing time of 3 minutes to obtain a molded product having a thickness of 1 mm.

[0008]

Example 2 A urea resin was treated in the same manner as in Example 1 except that a urea resin was used instead of the melamine resin, and 15 parts of aluminum fiber (Rainbow manufactured by Diamond Industry Co., Ltd.) was used instead of the aluminum flakes. A molding material was obtained, and this was molded to obtain a molded product.

[0009]

Comparative Example 1 A melamine resin molding material was obtained in the same manner as in Example 1 except that 40 parts of pulp was used instead of 40 parts of cellophane, and this was molded to obtain a molded product.

[0010]

Comparative Example 2 A melamine resin molding material was obtained in the same manner as in Example 1 except that aluminum flakes were removed, and this was molded to obtain a molded product.

The performances of Examples 1 and 2 and Comparative Examples 1 and 2 are shown in Table 1.

[0012]

[Table 1]

[0013]

The present invention is constructed as described above.
It was confirmed that the amino resin molding material having the constitution described in the claims has transparency and metallic tone, and was excellent in the present invention.

Claims (2)

[Claims] 1. After impregnating cellophane with amino resin and drying,
An amino resin molding material comprising a curing agent, a release agent, metal flakes and / or metal fibers, and a colorant if necessary. 2. The amino resin molding material according to claim 1, wherein the amount of metal flakes and / or metal fibers is 0.05 to 20% by weight of the total amount.