JPS61209258A - Amino resin molding material - Google Patents

Abstract

PURPOSE:An amino resin molding material having improved insert cracking resistance, obtained by blending an amino resin with a reinforcing material, a filler, a curing agent, a releasing agent, a colorant, etc. to give a molding material and adding further a specific amount of a vinyl chloride to the molding material. CONSTITUTION:(A) An amino resin (one or mixture or modified material of amino resin such as urea resin, melamine resin, guanamine resin, etc.) is blended with a reinforcing material, a filler, a curing agent, a releasing agent, a colorant, etc., and further mixed with (B) 1-20wt% based on the total amounts of a vinyl chloride resin such as one or a mixture of vinyl chloride resin, vinyl formal resin, chlorinated vinyl chloride resin, vinyl butyral resin, etc., having preferably <=100meshed particle diameter, to give the aimed molding material.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an amino resin molding material used for wiring appliances, electrical appliances, kitchen appliances, etc.

[Background technology]

Conventionally, amino resin molding materials have had drawbacks in insert resistance despite their excellent arc resistance, tracking resistance, electrical insulation, flame resistance, coloring properties, surface hardness, and solvent resistance. As a countermeasure to this problem, attempts have been made to add organic long fibers, but even with this, there are time constraints and the need to press-fit the press-fit metal while the molded product is still warm before the molded product is removed from the mold and cooled. There was KMM, a tool for controlling the dimensional accuracy of large holes and press-fit metal.

[Purpose of the invention]

An object of the present invention is to provide an amino resin molding material with excellent insert crack resistance.

[Disclosure of the invention]

The present invention is an amino resin molding material made by adding a reinforcing material, a filler, a curing agent, a mold release agent, a coloring agent, etc. to an amino resin. This molding material is a molding material whose insertion resistance can be greatly improved because the flexural modulus of the amino resin is lowered by adding vinyl chloride resin.The present invention will be described in detail below.

Vinyl chloride resins used in the present invention include vinyl chloride resin, vinylidene chloride resin, vinyl formal resin, chlorinated vinyl chloride/I/resin, vinyl petio resin, propylene vinyl chloride copolymer resin, vinyl chloride vinyl acetate copolymer resin, etc. A molding material consisting of a straight vinyl chloride resin or a copolymer resin thereof alone, a mixture thereof, or a stabilizer, a filler, a mold release agent, etc. added to the resin, which may be optional but preferably 10
A particle size of 0 mesh under is desirable in order to prevent puffiness in dispersibility and insert crack resistance. Also, the amount of vinyl chloride resin is 1 to 2 of the total amount.
It is desirable that the content be 0% by weight (hereinafter simply referred to as %).

That is, if it is less than 1%, insert crack resistance tends to decrease, and if it exceeds 1%, heat resistance tends to decrease. As the amino resin, amino resins such as area resin, melamine resin, and guanamine resin can be used alone, as a mixture, or as a modified product. As for reinforcing materials, fillers, curing agents, mold release agents, colorants, etc., those used in amino resin molding materials can be used as they are. There is no particular method for adding the vinyl chloride resin, and it may be added at the resin impregnation stage where the amino resin and reinforcing material are kneaded with a kneader or the like, or it may be added at the stage of crushing and coloring with a Paulmi μ or the like. is also often optional.

The present invention will be explained below using examples.

The materials were ground in a pole mill for 6 hours and colored according to the combination of Examples 1 to 4 and Conventional Example N in Table 1 to obtain a melamine resin molding material, and the molding material was molded to obtain a molded article.

Table 1 Parts by weight Note: Resin amount 50%, average molecular weight 1100, particle size 150 mesh, straight vinyl chloride resin [Effects of the invention] * Cooling of the melamine resin molded products of the source side 1 to 4 and the conventional example As clearly shown in Table 2, the performance of the molded products obtained from the amino resin molding material of the present invention was good in the press-fit test in which a brass screw with a diameter of 2.4 mm was inserted and the flexural modulus of the molded products. The superiority of amino resin molding materials was confirmed.

Table 2

Claims (2)

[Claims] (1) Amino resin with reinforcing material, filler, curing agent, mold release agent,
In amino resin molding materials with addition of colorants, etc.
An amino resin molding material characterized by further adding vinyl chloride resin. (2) The amino resin molding material according to claim 1, wherein the amount of vinyl chloride resin is 1 to 20% by weight based on the total amount.