JPS595062A - Phenol-resin laminated board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a phenolic resin laminate used for electronic equipment, electric equipment, computer equipment, etc., and its purpose is to maintain punching processability (improve flame retardancy while maintaining 7). It's about letting people know.

Conventionally, phenolic resin yINI boards used in electronic equipment, electrical equipment, computer equipment, etc. are used to mount a large number of electrical components such as ICs, transistors, and LSIs.
It is necessary to provide a large number of holes for mounting the VC in the laminate, and when the mounting holes are created by punching, etc., the laminate often gets cracked and cracked.

Furthermore, a large amount of flame retardant is sometimes mixed into the rolled phenol resin that meets the demand for flame retardancy, which increases the occurrence of cracks, cracks, and gluing.

The present invention solves the above-mentioned drawbacks.The present invention is intended to solve the above-mentioned drawbacks, and provides a laminate made by impregnating a base material for a laminate with a thermosetting resin liquid, laminating a required number of dried prepregs, and molding them under heat and pressure. Since this is a phenolic resin laminate using a melamine-modified phenolic resin liquid containing a flame retardant, the amount of flame retardant added can be greatly reduced, making it possible to improve flame retardancy while maintaining punching processability. It is something that

The present invention will be explained in detail below. The base materials for the laminate used in the present invention include woven fabrics made of inorganic fibers such as glass and asbestos, organic synthetic fibers such as polyester, laryamide, polyvinyl alcohol, and acrylic, and natural fibers made of cotton.
The base material may be nonwoven fabric, matte, paper, or a combination thereof. Cresyl diphenyl phosphate is used as a thermosetting resin liquid.

Tris beta chloroethyl phosphate, tris ν chlorglovir phosphate, tris 2.887 prom 10 vinyl phosphate, tris bromo chlorpropyl phosphate, tributyl phosphate, trioctyl phosphate, tryptoki V ethyl phosphate % tetrabromodiphenyl ether, to tribromophenyl Idokki V Ethyl Ether.

A melamine-modified phenol resin containing a flame retardant such as dibromocresyl glycyl ether is used.

Although there are no particular restrictions on the flame retardant, including Koki, it is preferable to use a backing type compound and a phosphorus compound alone or in combination to further enhance or reduce the flame retardant effect.

In addition, 1 mole of melamine-modified phenol, preferably but not limited to, 7 enol, cresol, or xylenol phenols in the presence of methylolmelamine, or phenols and vegetable oils that can be modified with phenols, lignin, xylene, naphthalene, or petroleum resins. The melamine-modified phenol resin obtained by reacting formaldehyde with formaldehyde, formaldehyde, and formaldehyde with an alkali catalyst such as ammonia or amine is preferable because it has good storage stability for the resin liquid and derigreg, and is particularly limited as an alkali catalyst. It is preferable to use a mixed catalyst of aqueous ammonia and triethylamine, although it is not necessary, and it is preferable to use 8 to 7 parts by volume of aqueous ammonia at 5% by weight (hereinafter simply referred to as %) per 1 part by volume of triethylamine. That is, if the amount of ammonia water is less than 8 parts by volume, the curing speed will be slow, and if it exceeds 7 parts by volume, the resin will become polymerized and the impregnation into the base material for the laminate will tend to decrease. Note that a copper-clad laminate can be obtained by placing a copper foil on one side or the lower side of the Gripreg laminate and then heating and press-molding it.

Below is the invention! A! This will be explained by referring to examples.

Example: To 1 mole of phenol, 1.8 mole of cyformaldehyde was added in η% formalin, and then methylolmelamine LO9 was added, followed by alkaline pressure using a mixed catalyst of 25% ammonia water and triethylamine, and then reacted at 76°C for 60 minutes. A melamine-modified phenol resin is obtained, and the melamine-modified phenol resin is made to contain 100 parts by weight (hereinafter simply referred to as "parts") of the melamine-modified phenol resin. To 11 parts of trabromodiphenyl phosphate was added 10 parts of V-dyldiphenyl phosphate to form a melamine-modified phenolic resin liquid containing a flame retardant. Next, the flame retardant-containing melamine-modified phenol resin was added with methyl alcohol in an amount of 5%.
0%Vcli! The prepared resin liquid is impregnated into a thick layer of kraft paper and dried to obtain a Gripreg.
The stacked laminate is sandwiched between molding plates and the molding pressure is 1.
00-1 was laminated and molded at a molding degree of 160''C for 60 minutes (6) to obtain a phenolic resin laminate.

Conventional Example Processed in the same manner as in the example except that a flame-retardant phenol resin liquid prepared by adding 70 parts of detoglomodiphenyl ade yv and a part of credit μ diphenyl phosphate to 100 parts of 7-functional ethanol resin was used. A phenolic resin @ laminate was obtained.

As is clear from Table 1, the flame retardancy and punching processability of the laminates of the example and the conventional example are 7" of the present invention, while the nol resin laminate has good W&flammability while maintaining punching processability. The superiority of the present invention was confirmed.

Table 1 Note: Perform a punching test using a belt punching mold and judge its appearance.

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Claims (1)

[Scope of Claims] +1) In a laminate formed by impregnating a base material for a laminate with a thermosetting resin liquid, laminating a required number of dried prepregs, and molding them under heat, a flame retardant is added to the thermosetting resin liquid. A phenolic resin laminate characterized by using a melamine-modified phenolic resin liquid. 12) The 7-Nol resin laminate according to claim 1, wherein the melamine-modified phenol resin is a product obtained by reacting phenols and formaldehydes with an alkali catalyst in the presence of methylolmelamine. (8) The pheno-IV resin laminate according to claims 1 and 2, wherein the alkali catalyst is a mixed catalyst of aqueous ammonia and triethylamine.