JPS5825349A - Amino resin molding material - Google Patents

Abstract

PURPOSE:To provide the titled molding material useful for electrical equipment and giving moldings which are sanitary and have remarkably improved resistance to arc, heat and insert cracking, dielectric properties and insulation resistance after boiling, by incorporating glass fiber and a silane coupling agent in an amino resin. CONSTITUTION:Glass fiber, pref., of alkali-free glass and a silane coupling agent are added to an amino resin, pref. melamine resin, particularly solid melamine resin to obtain the desired amino resin molding material. The amount of glass fiber to be added is not critical. Pref. glass fiber is used in an amount of 30-70wt% based on that of the resulting molding material. Any silane coupling agents may be used, through gamma-aminopropyltriethoxysilane is preferred. Other additives such as hardener, parting agent and filler may be added.

Description

Detailed Description of the Invention The present invention relates to an amino resin molding material used for wiring devices, electric appliances, etc., and its purpose is to improve the sanitary resistance, arc resistance, heat resistance, and insert crack resistance of molded products. The objective is to improve toughness, dimensional stability, voltage resistance, and insulation resistance after boiling.

Conventionally, pulp, wood flour, etc. are added to amino resin molding materials as reinforcing materials, which improves hygiene resistance, arc resistance, heat resistance, insert crack resistance, dimensional stability, voltage resistance,
Its insulation resistance after boiling was at a low level, and it had the disadvantage of not being able to keep up with the recent advances in performance, precision, and miniaturization of wiring devices and electrical appliances.

The present invention solves the above-mentioned drawbacks, and makes it possible to obtain a material made of amino wood and mature cedar, which has improved glass fiber sert crack resistance, dimensional stability, voltage resistance, and insulation resistance after boiling. It is something.

Next, the present invention will be briefly explained. The amino resin used in the present invention may be any amino resin in general, such as area resin, melamine resin, guanamine resin, or phenol-modified melamine resin, and may be in either liquid or solid form.Although there is no particular limitation, melamine resin is preferable. Although the glass fiber Ifi is not particularly limited, it is preferable to use non-alkali glass. That is, this is because electrical performance tends to be improved. Although the amount of glass fiber is not particularly limited, it is preferably 30-7% of the total amount.
This is because if the weight is 0 weight (hereinafter simply referred to as "regret"), the improvement in toughness and dimensional stability tends to be small, and if it exceeds 70 weight, the moldability and appearance of the molded product tend to deteriorate. The silane thread coupling agent is not particularly specified, and general types such as vinyl silane coupling agents and aminosilane coupling agents can be used, but preferred are aminopropyltriethoxysilane, N, β-aminoethyl silane, etc.
It is desirable to use an aminosilane coupling agent such as aminopropyltrimethoxysilane, N, β-aminoethyl r-5-nopropyldimethoxy7rane, and the like. That is, the performance tends to be the same as above.

As additives other than the amino resin, glass fiber, and silane coupling agent, curing agents, mold release agents, fillers, colorants, etc. commonly used as amino resin molding materials can be used as they are, and the above materials are kneaded, The amino resin molding material is obtained by pulverizing and granulating if necessary.

The present invention will be explained below using examples.

Examples 1 and 2 and the conventional example A solid melamine resin with a residual water content of 596 was mixed, mixed and crushed according to the recipe in Table 1 to obtain a melamine resin molding material.

Table 1 * Melamine resin molding materials of r-denoprobyl triethoxysilane Examples 1 and 2 and the conventional example were molded under a molding pressure of 100.
KQ/d - Molding temperature [80 seconds at 145℃, arc resistance,
The heat resistance, insert crack resistance/dimensional stability, voltage resistance, and insulation resistance after boiling are determined by the number of times the molded product breaks when dropped from a height of 0, which has been confirmed to be superior to the present invention.

*2 Based on ASTM%D495 *3 Heat the molded product at 13E for 2 hours and check the degree of discoloration on the outside.

○ Variable Δ Slight change [According to 4 JIS, l1911.

111 [5 Based on appearance judgment of insert molded product O Good

Claims (2)

[Claims] (1) An amino resin molding material characterized by containing glass fiber and a silane coupling agent. (2) The amino resin is a melamine resin,
/ Item 1 of the scope of the patent claim that is defined as mold ≠ a bandit. Amino resin molding material.