JPH06116416A - Resin-impregnated base and electrical laminate - Google Patents

Abstract

PURPOSE:To provide an electrical laminate having a high antistat effect and to provide a resin-impregnated base therefor. CONSTITUTION:The resin-impregnated base is one obtained by impregnating a base with an epoxy resin varnish comprising an epoxy resin, an aminated polysiloxane, an organopolysiloxane containing an epoxypolyether group, and a hardener and optionally containing a curing accelerator, a solvent, etc., and drying the resulting base. The electrical laminate is one obtained by superposing a necessary number of sheets of the resin-impregnated base, disposing a metal foil on at least one side of the pile, and uniting the laminae.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin-impregnated base material used for electronic equipment, electric equipment, calculators, communication equipment and the like, and an electric laminate.

[0002]

2. Description of the Related Art In recent years, attempts have been made to eliminate charging defects as a measure for increasing the reliability of electrical and electronic equipment. Although an electrically conductive carbon or an antistatic agent is added as an antistatic means, it has a drawback that the electric insulation is lowered.

[0003]

As described in the prior art, it is not easy to eliminate the charging failure.
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 a resin-impregnated base material that does not have a charging failure and an electrical laminate to improve reliability of electrical and electronic devices. To improve.

[0004]

According to the present invention, an amino group-containing polysiloxane, an epoxy polyether group-containing organopolysiloxane, and a curing agent are added to an epoxy resin, and a curing accelerator, a solvent, and the like are further added if necessary. An epoxy resin varnish is impregnated with a base material and dried, and a resin-impregnated base material, and a metal foil is disposed on and integrated with a required number of upper and / or lower surfaces of the resin-impregnated base material. Therefore, the above-mentioned object can be achieved, and the present invention will be described in detail below.

The epoxy resin used in the present invention is a bisphenol A type epoxy resin, a phenol novolac type epoxy resin, a cresol novolac type epoxy resin, a glycidyl ester type epoxy resin, a glycidyl amine type epoxy resin, a linear aliphatic epoxy resin. It is possible to use general epoxy resins such as alicyclic epoxy resin, heterocyclic epoxy resin, halogenated epoxy resin, and the like. In the present invention, it is necessary to contain an amino group-containing polysiloxane and an epoxy polyether group-containing organopolysiloxane, and the addition amount thereof is 0.05 to 3 of the total amount excluding the solvent.
It is preferably wt% (hereinafter simply referred to as%). That is, if it is less than 0.05%, the antistatic effect is small, and if it exceeds 3%, bleeding tends to occur. As the curing agent, a phenol resin, an isocyanate, an amine type curing agent, an acid anhydride, a Lewis acid complex compound, an imidazole type compound or the like can be used without any particular limitation. If necessary, a phosphorus-based or tertiary amine-based curing accelerator is used as the curing accelerator. The solvent used as needed is not particularly limited as long as it is compatible with the resin, such as a ketone solvent or an alcohol solvent. Further, if necessary, an inorganic powder filler such as talc, clay, silica, calcium carbonate, aluminum hydroxide, antimony trioxide, antimony pentoxide, etc.,
Glass fiber, asbestos fiber, pulp fiber, synthetic fiber,
Fibrous fillers such as ceramic fibers, colorants and the like can be added. As the base material, glass, inorganic fibers such as asbestos, polyester, polyamide, polyacrylic,
Woven cloth, non-woven cloth, paper, mat and the like of organic fibers such as polyvinyl alcohol, polyimide and fluororesin, and natural fibers such as cotton can be used. The base material may be impregnated only with the same resin, but a plurality of impregnations such as primary impregnation with the same resin or different type resin and secondary impregnation may be performed to make the impregnation more uniform. Thus, the resin is impregnated into the base material and dried to obtain a resin-impregnated base material. As the metal foil, a single, alloy, or composite foil of copper, aluminum, brass, nickel, iron or the like can be used. In this manner, a metal foil is provided on the upper surface and / or the lower surface of the required number of the resin-impregnated base materials and integrated to obtain an electrical laminate. The present invention will be described below based on examples.

[0006]

EXAMPLES Amino group-containing polysiloxane 0.2 part and epoxy polyether group-containing organopolysiloxane 0.2 per 100 parts by weight (hereinafter simply referred to as “part”) of an epoxy resin (Epicoat 1001 manufactured by Shell Chemical Co., Ltd.) Department,
Dicyandiamide 4 parts, benzyldimethylamine 0.2
Part of the epoxy resin varnish containing 100 parts of methyl oxitol was impregnated with a 0.018 mm-thick plain woven glass cloth so that the amount of resin adhered was 45%, and dried to obtain a resin-impregnated base material. Next, a laminated body in which copper foil having a thickness of 0.035 mm is arranged on the upper and lower surfaces of the eight resin-impregnated base materials stacked on each other is heated and pressure-molded at 160 ° C. for 90 minutes at a molding pressure of 40 Kg / cm ² , and a thickness of 1 is obtained. A 0.6 mm double-sided copper-clad laminate was obtained.

[0007]

[Comparative Example] Dicyandiamide 4 to 100 parts of epoxy resin (Epicoat 1001 manufactured by Ciel Chemical Co., Ltd.)
Parts, benzyl dimethylamine 0.2 parts, and methyl oxytol 100 parts were used to obtain a resin-impregnated base material and double-sided copper-clad laminate having a thickness of 1.6 mm by the same procedure as in Example except that an epoxy resin varnish was used. I got a plate.

Table 1 shows the performance of the electrical laminates of Examples and Comparative Examples. The charge amount is the charge amount within 10 minutes of the package parts feeder.

[0009]

[Table 1]

[0010]

The present invention is constructed as described above.
It was confirmed that the electrical laminate using the resin-impregnated base material having the structure described in the claims has a large antistatic effect and is excellent in the present invention.

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Claims (2)

[Claims] 1. A base material for an epoxy resin varnish obtained by adding an amino group-containing polysiloxane, an epoxy polyether group-containing organopolysiloxane, and a curing agent to an epoxy resin, and further adding a curing accelerator, a solvent, etc., if necessary. A resin-impregnated base material characterized by being impregnated and dried. 2. A base material for an epoxy resin varnish obtained by adding an amino group-containing polysiloxane, an epoxy polyether group-containing organopolysiloxane, and a curing agent to an epoxy resin, and further adding a curing accelerator, a solvent, etc., if necessary. An electrical laminate comprising an impregnated and dried resin-impregnated base material on which a required number of upper and / or lower surfaces are provided with metal foil.