JPH06116419A - Resin-impregnated base and electrical laminate - Google Patents

Abstract

PURPOSE:To provide an electrical laminate good in electrical performance and heat resistance without postcuring and to provide a resin-impregnated base therefor. CONSTITUTION:The resin-impregnated one obtained by impregnating a base with an epoxy resin varnish comprising an epoxy resin, a hardener, and a curing accelerator with a basicity of 11 or higher and optionally containing other 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, epoxy resin laminates have been increasingly used as a measure for increasing the reliability of electrical and electronic equipment. Epoxy resin laminates have excellent heat distortion temperature, moisture resistance reliability and electrical insulation. After cure is needed to get it.

[0003]

As described in the prior art, after-curing is necessary to bring out the performance of the epoxy resin laminates which are widely used at present. 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 an epoxy resin-impregnated base material and an epoxy resin electrical laminate that can provide excellent performance without after-cure. Especially.

[0004]

The present invention provides a base material for an epoxy resin varnish obtained by adding a curing agent and a curing accelerator having a basicity of 11 or more to an epoxy resin, and further optionally adding a curing accelerator, a solvent and the like. A resin-impregnated base material which has been impregnated with and dried on, and a laminate for electrical use, characterized in that a required number of the resin-impregnated base material is provided with a metal foil on the upper surface and / or the lower surface thereof. The present invention has been accomplished, 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. As the curing agent, phenol resin, isocyanate, amine curing agent, acid anhydride curing agent, Lewis acid complex compound, dicyandiamide, etc. are used. 1.5 as a curing accelerator
Although it is necessary to use a curing accelerator having a basicity of 11 or more, such as a diazabicyclo ring-containing compound such as diazabicyclo (4,3,0) nonene, a curing accelerator for phosphorus compounds, tertiary amine compounds, etc. in general Can also be used together. 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. If necessary, talc, clay, silica,
It is possible to add inorganic powder fillers such as calcium carbonate, aluminum hydroxide, antimony trioxide and antimony pentoxide, fibrous fillers such as glass fibers, asbestos fibers, pulp fibers, synthetic fibers and ceramic fibers, and coloring agents. it can. As the base material, it is possible to use glass, inorganic fibers such as asbestos, organic fibers such as polyester, polyamide, polyacrylic, polyvinyl alcohol, polyimide and fluororesin, woven cloth of natural fibers such as cotton, non-woven fabric, paper and mat. it can. 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]

[Embodiment] Epoxy resin (Shell Chemical Co., Epi
Coat 1001) 100 parts by weight (hereinafter simply referred to as "part")
In contrast, dicyandiamide 4 parts, 1.5 diazabicyclo
0.5 parts of (4.3.0) nonene, 1 of methyl oxitol
Epoxy resin varnish added with 0 parts, thickness 0.01
8mm plain woven glass cloth so that the amount of resin adhered becomes 45%
Was impregnated and dried to obtain a resin-impregnated base material. Next, the resin impregnation
A copper foil with a thickness of 0.035 mm is placed on the upper and lower surfaces of the eight base materials.
Forming pressure of 40Kg / cm ², 16
Both sides with a thickness of 1.6 mm after heat and pressure molding at 0 ° C for 90 minutes
A 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. Get a plate, 3 at 150 ℃
After-curing for 0 minutes, an electrical laminate was obtained.

Table 1 shows the performance of the electrical laminates of Examples and Comparative Examples. Volume resistance under heat is at 150 ° C.

[0009]

[Table 1]

[0010]

The present invention is constructed as described above.
It has been confirmed that the electrical laminate using the resin-impregnated base material having the structure described in the claims has good electrical insulation resistance and heat resistance even without after-curing and is excellent in the present invention.

Claims (2)

[Claims] 1. A base material is impregnated into an epoxy resin varnish obtained by adding a curing agent and a curing accelerator having a basicity of 11 or more to an epoxy resin, and further a curing accelerator, a solvent, etc., if necessary, and drying. Characteristic resin-impregnated base material. 2. An epoxy resin varnish obtained by adding a curing agent and a curing accelerator having a basicity of 11 or more to an epoxy resin, and further adding a curing accelerator, a solvent, etc., if necessary, and impregnating a base material with the resin and impregnating the resin. A laminated board for electrical use, characterized in that a required number of base materials are provided with a metal foil on the upper surface and / or the lower surface to form a body.