JPH05230331A - Amino resin molding material - Google Patents

Abstract

PURPOSE:To provide the subject molding material excellent in dimensional stability, impact resistance and color clearness, useful for wiring utensils, etc., incorporated with an alcohol-soluble polyamide resin. CONSTITUTION:The objective molding material can be obtained by incorporating (A) 100 pts.wt. of an amino resin with (B) pref. 1 10 pts.wt. of an alcohol-soluble polyamide resin such as nylon 6.

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 obtaining wiring products, electric appliances, kitchen appliances, household products, miscellaneous goods, etc., particularly moldings requiring dimensional stability and impact resistance. is there.

[0002]

2. Description of the Related Art Conventionally, molded articles made of urea resin and melamine resin are useful because they are hard and have high stain resistance, but they have a problem that they are small in dimensional stability and impact resistance. For this reason, a phenol resin molded product is used in this field, but there is a problem that it has no bright color.

[0003]

As described in the prior art, the amino resin molding material has a problem in that although it is possible to obtain a light-colored molded product, dimensional stability and impact resistance are small. It was The present invention has been made in view of the above problems in the prior art, and an object thereof is to provide an amino resin molding material capable of obtaining a molded article having excellent dimensional stability and impact resistance. is there.

[0004]

Means for Solving the Problems The present invention is an amino resin molding material characterized by containing an alcohol-soluble polyamide resin, and therefore, the above-mentioned object can be achieved. Explained.

As the amino resin used in the present invention, all amino resins such as urea resin, melamine resin and guanamine resin can be used. The amino resin is preferably dehydrated under reduced pressure and used in the form of a solid resin. The amino resin also includes a modified amino resin such as epoxy modified or phenol modified. Alcohol-soluble polyamide resin is generally soluble in alcohol such as methyl alcohol, ethyl alcohol, butyl alcohol, etc. and is referred to as 6.6 nylon, 6 nylon, 6.10 nylon, 11 nylon, copolymerized nylon, modified nylon, etc. It is something that is known. The amount of the alcohol-soluble polyamide resin is 1-10 with respect to 100 parts by weight of the amino resin (hereinafter simply referred to as "part").
It is preferably 0 part. That is, if it is less than 1 part, it is difficult to improve dimensional stability and impact resistance, and if it exceeds 100 parts, heat resistance and hardness tend to decrease. Alcohol-soluble polyamide resin is not added as it is,
It is necessary to dissolve it in alcohol before use. As a curing agent, phthalic anhydride or the like is used, and it is preferable to add 0.01 to 3 parts by weight to 100 parts by weight of the resin (hereinafter simply referred to as “part”). As the release agent, fatty acid, fatty acid metal salt,
0.05 to 5 per 100 parts of resin using wax
Partial addition is preferred. As the filler and the reinforcing agent, pulp, wood powder, glass fiber, calcium carbonate, talc and the like are used. Further, a colorant is added if necessary. Thus, the above-mentioned materials are blended, mixed, kneaded, pulverized, and further granulated as required to obtain an amino resin 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 30 parts of phenol was added to 100 parts of the melamine resin obtained by reacting at 85 ° C. for 1 hour with PH9, and reacted at 90 ° C. for 1 hour. To obtain a melamine phenol resin solution, and then, to 100 parts of the resin, 20 parts of a 50% by weight (hereinafter simply referred to as%) methyl alcohol solution of copolymerized nylon (CM8000, manufactured by Toray Industries, Inc.) was added. The mixture was heated and dehydrated under reduced pressure at a vacuum degree of 100 TORR to obtain a solid modified melamine resin. Next, 60 parts of the solid modified melamine resin, 40 parts of pulp, 0.3 part of phthalic anhydride, and 0.05 part of zinc stearate were mixed, mixed, kneaded, and pulverized to obtain a modified melamine resin molding material. Next, the molding material was molded using a transfer molding machine at a mold temperature of 145 ° C. and a molding pressure of 100 Kg / cm ^{2 for a} curing time of 3 minutes to obtain a molded product.

[0008]

Example 2 A modified melamine resin molding material and a molded product were obtained in the same manner as in Example 1 except that the amount of the alcoholic dissolved product of nylon in Example 1 was changed to 60 parts.

[0009]

Example 3 A modified melamine resin molding material and a molded product were obtained in the same manner as in Example 1 except that the amount of the alcohol-dissolved product of nylon in Example 1 was changed to 100 parts.

[0010]

[Comparative Example] A modified melamine resin molding material and a molded product were obtained in the same manner as in Example 1 except that the amount of the nylon alcohol dissolved product in Example 1 was not used.

The performances of Examples 1 to 3 and Comparative Example are as shown in Table 1.

[0012]

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 good dimensional stability and impact resistance, and was excellent in the present invention.

Claims (1)

[Claims] 1. An amino resin molding material containing an alcohol-soluble polyamide resin.