JPS5825347A - Amino resin molding material - Google Patents

Abstract

PURPOSE:To provide an amino resin molding material which has excellent moldability and gives moldings having excellent appearance, resistance to insert cracking and drilling properties, by incorporating a nitrogen compd. having a specified structural formula in an amino resin. CONSTITUTION:A compd. of the formula (wherein R is 17C) is added to a liquid or solid amino resin such as urea resin or melamine resin. Said compd. may be added in the form of a solid, but pref. as a solution in metlyl alcohol, whereby the compd. is well-dispersed. The amount of the compd. to be added is not critical. Pref. the compd. is used in an amount of 0.5-10wt% based on the total amount of the resulting molding material. If desired, other additives such as hardener, parting agent and a base material may be used together with the amino resin. The resulting amino resin molding material is useful for wiring and electrical equipments.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an amino resin molding material used for wiring devices, electrical appliances, etc., and its purpose is to improve insert crack resistance and drill workability of molded products. It is in.

Conventionally, styrene rubber, nitrile rubber, etc. have been added to K to improve the insert crack resistance and drill workability of amino resin molded products, but since it is not compatible with amino resin, degassing during molding is difficult. , there was a problem with the appearance of the molded product.

The present invention solves the above-mentioned drawbacks, and in the general formula 1, R
An amino resin molding material containing a compound represented by C1F (hereinafter simply referred to as compound A), which has excellent moldability, molded product appearance, insert crack resistance, and drill workability. This is what I was able to obtain.

Next, the present invention will be described in detail.The amino resin used in the present invention includes urea paulownia resin, melamine resin, guanamine resin, phenol-modified melamine resin, etc., and may be either liquid or isothermal. Although the compound AFi may be added as a solid, it is preferable to add it in the form of a solution dissolved in methyl alcohol or the like because this improves dispersibility. The amount of compound A to be added is not particularly limited, but is preferably 0.5 to 10% by weight Is (hereinafter simply referred to as -) based on the total amount.
It is desirable to add. That is, if it is less than O, S*, the effect of improving insert crack resistance and drill workability tends to be small, and if it exceeds 1oIs, the appearance of the molded product tends to deteriorate. The curing agent, mold release agent, base material, filler, and coloring agent commonly used as amino resin molding materials can be used as they are, and the above materials can be mixed, mixed, crushed, or processed as necessary. The amino resin molding material is obtained by granulation.

The present invention will be explained below with reference to examples.Example 1 40 parts by weight of solid melamine resin (hereinafter simply referred to as parts) K, 47.5 parts of pulp, 0.5 part of phthalic acid, 1 part of zinc stearate , 1 part of coloring agent, and 10 parts of compound A were obtained as materials Example 2 Area of resin-containing Ji60 bag 1800 m of resin initial condensate
0.3 parts of ammonium chloride, 0.1 part of sodium ice base, and 260 parts of pulp were added to the mixture, mixed, mixed, and dried to obtain a dry product, and 0.5 parts of zinc stearate was added to 100 parts of the dry product. 1 part, 0.5 part of a coloring agent, and 1 part of a 50% methyl alcohol solution of Compound A were added, and the mixture was colored and ground in a ball mill to obtain an amino resin molding material.

0.3 parts of ammonium chloride for 1800 parts of the area resin initial condensate with the same resin content as Example 2 of the conventional example, 60-
Add 0.1 part of IJium hydroxide and 260 parts of pulp, mix, knead, and dry to obtain a dry product. 0.5 part of zinc stearate and 0.5 part of colorant per 100 parts of wrinkled dry product. The mixture was colored and pulverized using a ball mill to obtain an amino resin molding material.

The amino resin molding materials of Examples 1 and 2 and the conventional example were tested for the occurrence of cracks around the metal insert molded rain insert and the drill workability of the molded products. The results are shown in Table 1. The insert crack resistance and drill workability of the molded product obtained from the test were confirmed to be superior to that of the present invention.

Table 1

Claims (1)

[Claims] General formula % formula % In formula 1, R ke C1? An amino resin molding material characterized by containing a compound represented by: