JP7268422B2 - Diallyl phthalate resin molding materials and electronic and electrical equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a diallyl phthalate resin molding material and an electronic/electric device.

Various developments have so far been made on diallyl phthalate resin molding materials. As this type of technology, for example, the technology described in Patent Document 1 is known. Patent Document 1 describes a diallyl phthalate resin molding material containing a diallyl phthalate resin (Table 1 of Patent Document 1).

JP 2009-256671 A

However, as a result of investigation by the present inventors, it has been found that the diallyl phthalate resin molding material described in Patent Document 1 has room for improvement in terms of tracking resistance and flatness of thin molded products.

As a result of further investigation by the present inventor, the diallyl phthalate resin molding material used for forming the insulating sheet sandwiched between the two plate-shaped conductors has not only tracking resistance but also thin molded products. It has been found that it is required to improve the flatness of
As a result of further intensive research based on such findings, it was found that in a diallyl phthalate resin molding material containing a diallyl phthalate prepolymer, a diallyl phthalate monomer, and a filler, it is possible to appropriately control the flow length measured in a rectangular flow path. As a result, the inventors have found that the tracking resistance and the flatness of thin-walled molded products can be improved, and have completed the present invention.

According to the invention,
A diallyl phthalate resin molding material used for forming an insulating sheet sandwiched between two plate-shaped conductors,
comprising a diallyl phthalate prepolymer, a diallyl phthalate monomer, and a filler;
The flow length of the diallyl phthalate resin molding material measured according to the following procedure A is 60 mm or more and 200 mm or less.
A diallyl phthalate resin molding material is provided.
(Procedure A)
The diallyl phthalate resin molding material is injected into a rectangular channel having a width of 10 mm and a height of 0.25 mm under conditions of a mold temperature of 165° C. and an injection pressure of 27.6 MPa. The distance from the upstream end of the channel to the end of the channel through which the diallyl phthalate resin molding material flows is obtained, and this distance is defined as the flow length (mm).

Also according to the present invention,
An electronic/electric device component having at least two plate-shaped conductors and an insulating sheet sandwiched between the two plate-shaped conductors,
An electronic/electric device is provided in which the insulating sheet is composed of a cured product of the diallyl phthalate resin molding material.

INDUSTRIAL APPLICABILITY According to the present invention, a diallyl phthalate resin molding material excellent in tracking resistance and flatness of a thin molded product, and an electronic/electric device using the same are provided.

An outline of the diallyl phthalate resin molding material of the present embodiment will be described.

The diallyl phthalate resin molding material of this embodiment is used to form an insulating sheet sandwiched between two plate-shaped conductors. This diallyl phthalate resin molding material contains a diallyl phthalate prepolymer, a diallyl phthalate monomer, and a filler. The flow length of the diallyl phthalate resin molding material measured according to the following procedure A is 60 mm or more and 200 mm or less.

(Procedure A)
The diallyl phthalate resin molding material is injected into a rectangular channel having a width of 10 mm and a height of 0.25 mm under conditions of a mold temperature of 165° C. and an injection pressure of 27.6 MPa. The distance from the upstream end of the channel to the end of the channel through which the diallyl phthalate resin molding material flows is obtained, and this distance is defined as the flow length (mm).

According to the findings of the present inventors, the use of a diallyl phthalate prepolymer and a filler can improve the tracking resistance, and the combined use of a diallyl phthalate monomer improves the flow characteristics during molding of the diallyl phthalate resin molding material. was found to be enhanced. In such a diallyl phthalate resin molding material, it was found that the tracking resistance and the flatness of the thin molded product can be improved by appropriately controlling the flow length measured in the rectangular flow path.

The lower limit of the flow length of the diallyl phthalate resin molding material is 60 mm or more, preferably 70 mm or more, more preferably 75 mm or more. As a result, during molding, the moldability in a narrow space can be improved, and a thin molded product with excellent flatness can be realized. On the other hand, the upper limit of the flow length is not particularly limited, but may be, for example, 200 mm or less, or 150 mm or less. This makes it possible to balance various characteristics of the molded product.

Further, the upper limit of the thermal expansion anisotropy of the diallyl phthalate resin molding material measured according to the following procedure B is, for example, 2.3 or less, preferably 2.0 or less, more preferably 1.9 or less. . As a result, a molded article having excellent dimensional stability in the plane direction can be realized. On the other hand, the lower limit of the thermal expansion anisotropy is not particularly limited, but may be, for example, 1.0 or more, or 1.1 or more. This makes it possible to balance various characteristics of the molded product.

(Procedure B)
Using the diallyl phthalate resin molding material, injection molding is performed under the conditions of gate size: 8 mm × 3 mm, injection pressure: 100 MPa, mold temperature: 165 ° C., filling time: 4 seconds, so that the longitudinal direction is the flow direction. A compact of 80 mm×10 mm×4 mmt is produced, and a test piece of 10 mm×10 mm×4 mmt is cut out from the compact. Using the obtained test piece, the linear expansion coefficient α _MD in the flow direction and the coefficient A directional linear expansion coefficient α _TD is calculated. Let the thermal expansion anisotropy be α _TD /α _MD .

In addition, the lower limit of the flexural modulus of the diallyl phthalate resin molding material at 25° C. measured according to the following procedure C is, for example, 11.5 GPa or more, preferably 12.0 GPa or more, and more preferably 13.0 GPa or more. be. As a result, a molded article having excellent rigidity can be realized. On the other hand, the upper limit of the bending elastic modulus at 25° C. is not particularly limited, but may be, for example, 30 GPa or less, or 25 GPa or less. This makes it possible to balance various characteristics of the molded product.

(Procedure C)
Using the diallyl phthalate resin molding material, injection molding is performed under the conditions of gate size: 8 mm × 3 mm, injection pressure: 100 MPa, mold temperature: 165 ° C., filling time: 4 seconds, so that the longitudinal direction is the flow direction. A molded body is produced, and the flexural modulus (GPa) at 25° C. of the molded body is measured according to JISK6911.

In the present embodiment, the flow length, thermal expansion anisotropy and It is possible to control the flexural modulus. Among these, for example, the use of diallyl phthalate monomer, the type of diallyl phthalate prepolymer, the combination and blending ratio of fibrous inorganic fillers and non-fibrous (for example, spherical) inorganic fillers, and the type of reaction initiator are appropriately selected. factors for setting the above-mentioned flow length, thermal expansion anisotropy, and flexural modulus within desired numerical ranges.

By using the diallyl phthalate resin molding material of the present embodiment, it is possible to realize a molded article that can withstand a high voltage of 600 V and has excellent tracking resistance. This molded article is excellent in flatness and dimensional stability in the planar direction of a thin molded article, and is therefore suitable for use as an insulating sheet sandwiched between two conductors.

An electronic/electrical device according to this embodiment includes an electronic/electrical device component having at least two plate-shaped conductors and an insulating sheet sandwiched between the two conductors. An insulating sheet used for electronic/electrical device parts is composed of a cured product (molded product) of the diallyl phthalate resin molding material.

When an electronic/electrical device part has three or more plate-shaped conductors, insulation is provided between each of the plate-shaped conductors arranged vertically adjacent to each other, and also on the outermost layer side of the plate-shaped conductors. A seat may be provided.
Moreover, the insulating sheet may be configured to cover not only one surface of the plate-shaped conductor but also the entire surface.

A plate-like conductor is a plate-like member made of a conductive metal material such as copper, aluminum, or an alloy, for example. The surface of the plate-like conductor may be not only flat but also partially curved or curved. Conductive metal materials that easily pass large currents can be used.

As electronic and electrical equipment, it is used for space-saving items such as small size and meat type, high voltage and high speed. By using electronic/electrical device components, it is possible to improve the reliability of such electronic/electrical devices.

The composition of the diallyl phthalate resin molding material of this embodiment will be described in detail.

The diallyl phthalate resin molding material contains a diallyl phthalate prepolymer (a diallyl phthalate resin) and a diallyl phthalate monomer.

A diallyl phthalate prepolymer is a type of allyl resin obtained by polymerizing a diallyl phthalate monomer, which is an ester of phthalic acid and allyl alcohol. These include ortho type using phthalic anhydride or orthophthalic acid, meta type using isophthalic acid, and para type using terephthalic acid, depending on the type of phthalic acid used. These homopolymers may be used, and copolymers containing two or more of them may be included. In addition, the hydrogen atoms on the benzene ring may be substituted with halogen atoms such as chlorine and bromine, and all or part of the unsaturated bonds present in the molecule may be hydrogenated. good.
These may be used alone or in combination of two or more.

The weight average molecular weight of the diallyl phthalate prepolymer (measured by GPC and converted to standard polystyrene) is, for example, 20,000 to 60,000, preferably 20,000 to 40,000, more preferably 20,000 to 30,000. is.

The diallyl phthalate monomer is an ester of phthalic acid and allyl alcohol, and ortho-type, meta-type, and para-type monomers may be used in the same manner as the diallyl phthalate resin.

The content of the diallyl phthalate prepolymer is, for example, 25 parts by mass to 45 parts by mass, preferably 30 parts by mass to 45 parts by mass, more preferably 32 parts by mass to 44 parts by mass with respect to 100 parts by mass of the diallyl phthalate resin molding material. Department.

In the present specification, "-" means including upper and lower limits unless otherwise specified.
Moreover, 100 mass % of diallyl phthalate resin molding material means content with respect to the whole solid content of a resin composition. The solid content of the resin composition refers to the non-volatile content in the fat composition, and refers to the remainder after excluding volatile components such as water and solvent.

The content of the diallyl phthalate monomer is, for example, 0.2 parts by mass to 5 parts by mass, preferably 0.3 parts by mass to 3 parts by mass, more preferably 0.5 parts by mass with respect to 100 parts by mass of the diallyl phthalate prepolymer. parts to 1.5 parts by mass. By appropriately adjusting the addition amount of the diallyl phthalate monomer, the fluidity of the diallyl phthalate resin molding material can be maintained while reducing the content of the diallyl phthalate prepolymer. In addition, although the detailed mechanism is not clear, by reducing the polymer content while using a low-viscosity diallyl phthalate prepolymer, the fluidity is high and the pressure gradient during molding can be reduced. It is thought that a molded product with excellent flatness can be realized.

The diallyl phthalate resin molding material contains a filler.
As the filler, an inorganic filler or an organic filler is used, but from the viewpoint of electrical insulation, an inorganic filler may be used.

The diallyl phthalate resin molding material may contain a fibrous inorganic filler such as glass fiber as an inorganic filler.

Although the average fiber diameter of the glass fiber is not particularly limited, it is, for example, 3 μm to 30 μm, preferably 6 to 15 μm. As a result, the workability in the step of forming a molding material can be improved, and the mechanical strength of the obtained molding can be improved. Mechanical strength can be improved by setting the lower limit of the average fiber diameter to the above lower limit or more. By making the upper limit of the average fiber diameter equal to or less than the above upper limit, it is possible to suppress deterioration in kneadability due to deterioration in followability to the rolls when kneading rolls are used in the production of the molding material.

Glass fibers are not particularly limited, but examples thereof include A-glass, C-glass, D-glass, E-glass, R-glass, S-glass, T-glass, and AR-glass.

The diallyl phthalate resin molding material may contain a spherical, plate-like, or amorphous inorganic filler as a non-fibrous inorganic filler.

Examples of non-fibrous inorganic fillers include, but are not limited to, aluminum hydroxide, magnesium hydroxide, calcium carbonate, calcined clay, uncalcined clay, wollastonite, talc, silica, diatomaceous earth, alumina, magnesium oxide, Barium sulfate or the like may also be used. These may be used alone or in combination of two or more.

The particle size of the non-fibrous inorganic filler is not particularly limited, but it is preferably 100 mesh and volume average particle size of 0.5 to 80 μm, more preferably 100 mesh and volume average particle size. 1 to 30 μm. Mechanical strength can be improved by setting the lower limit of the particle size to the above lower limit or more. In addition, since the anisotropy in the coefficient of linear expansion of the molded product can be reduced, a molded product with excellent dimensional stability can be realized. On the other hand, by making the upper limit of the particle size equal to or less than the above upper limit value, the variation in mechanical strength can be reduced.

The content of the filler is, for example, 90 parts by mass to 250 parts by mass, preferably 100 parts by mass to 230 parts by mass, more preferably 110 parts by mass to 200 parts by mass with respect to 100 parts by mass of the diallyl phthalate prepolymer. . By setting the lower limit of the content of the filler to the above lower limit or more, a molded article having excellent mechanical strength can be realized. A diallyl phthalate resin molding material having excellent fluidity can be realized by setting the upper limit of the content of the filler to be equal to or higher than the above upper limit.

The diallyl phthalate resin molding material may contain a fibrous inorganic filler and a non-fibrous inorganic filler as fillers. By including a granular or amorphous non-fibrous inorganic filler, the orientation of the inorganic filler can be reduced, and the linear expansion anisotropy of the molded product can be reduced. Moreover, since the content of the filler can be increased, the rigidity of the molded product can be increased.

The content of the glass fiber is, for example, 20 parts by mass to 120 parts by mass, preferably 30 parts by mass to 115 parts by mass, more preferably 35 parts by mass to 110 parts by mass with respect to 100 parts by mass of the diallyl phthalate prepolymer. . By making the lower limit of the glass fiber content equal to or higher than the above lower limit, practically required mechanical strength can be maintained. Fluidity and linear expansion anisotropy can be improved by making the upper limit of the glass fiber content equal to or less than the above upper limit.

The content of the non-fibrous inorganic filler is, for example, 20 parts by mass to 180 parts by mass, preferably 30 parts by mass to 170 parts by mass, more preferably 35 parts by mass to 100 parts by mass of the diallyl phthalate prepolymer. 150 parts by mass. Fluidity, rigidity, anisotropy, etc. can be achieved by setting the lower limit of the content of the non-fibrous inorganic filler to the above lower limit or more. By setting the upper limit of the content of the non-fibrous inorganic filler to the above upper limit or less, it is possible to realize a molded article having excellent balance of properties.

The diallyl phthalate resin molding material may contain a reaction initiator.

A commonly used organic peroxide may be used as the reaction initiator. Dialkyl peroxides, hydroperoxides, peroxyesters, and the like may be used as organic peroxides. These may be used alone or in combination of two or more. Also, two or more kinds having different decomposition temperatures may be used.

Organic peroxides may include those with a decomposition temperature of 150° C. to 200° C. to obtain a half-life of 1 minute. Since each component can be kneaded at a temperature at which the reaction initiator does not decompose, it is possible to obtain a diallyl phthalate resin molding material in which the progress of the reaction via the reaction initiator is suppressed. As a result, a diallyl phthalate resin molding material having excellent fluidity can be realized.

The content of the reaction initiator is, for example, 0.1 to 5 parts by mass and 0.5 to 3 parts by mass with respect to 100 parts by mass of the diallyl phthalate resin molding material.

In addition to the components described above, the diallyl phthalate resin molding material may contain other additives as long as the objects of the present invention are not impaired. As other additives, additives such as coupling agents, elastomers, flame retardants, release agents, curing aids and pigments are used. These may be used alone or in combination of two or more.

Examples of the coupling agent include aminosilane, epoxysilane, acrylsilane, and vinylsilane. These may be used alone or in combination of two or more.

Examples of the elastomer include styrene-butadiene rubber, butadiene rubber, acrylic rubber, nitrile rubber, isoprene rubber, ethylene propylene rubber, polyisobutylene, polyurethane, and polyvinyl butyral. These may be used alone or in combination of two or more.

The flame retardant may include one selected from the group consisting of metal hydroxides, uncalcined clays, boron compounds and nitrogen compounds. These may be used alone or in combination of two or more.

Examples of the metal hydroxide include magnesium hydroxide and aluminum hydroxide.
Examples of the boron compound include boric acid and zinc borate.
These decompose during combustion to generate water, which draws heat from the combustion field, thereby exhibiting flame retardancy. When used, it can be used properly considering the influence on properties other than flame retardancy.

Examples of the nitrogen compound include melamine monomers, melamine resins, melamine cyanurate, and the like. A nitrogen compound emits an inert gas during combustion, dilutes the oxygen concentration in the combustion field, and stops combustion, thereby exhibiting flame retardancy.

The amount of the flame retardant compounded is, for example, 0.1 to 20 parts by mass and 0.5 to 15 parts by mass with respect to 100 parts by mass of the diallyl phthalate resin molding material. Sufficient flame retardancy can be expressed by making it more than the said minimum. Moreover, by setting the content to the above upper limit or less, the curability of the molded product can be improved.

The diallyl phthalate resin molding material may be substantially free of one or more selected from the group consisting of halogen compounds, antimony compounds, red phosphorus and organic phosphorus compounds. Preferably, the diallyl phthalate resin molding material does not contain halogen compounds, antimony compounds, red phosphorus and organic phosphorus compounds. That is, it is preferable to use non-halogen, non-antimony and non-phosphorus flame retardants. As a result, an environmentally friendly and clean diallyl phthalate resin molding material can be realized.

Magnesium hydroxide, calcium hydroxide and the like are used as the curing accelerator.

Examples of the release agent include natural waxes such as carnauba wax, synthetic waxes such as montan acid ester wax, higher fatty acids such as zinc stearate and calcium stearate and metal salts thereof, and paraffin.

The diallyl phthalate resin molding material of the present embodiment is produced by a normal method. It is obtained by mixing each of the above components in a predetermined mixing ratio, melt-kneading them using a heating roll, a co-kneader, and a twin-screw extruder, and then cooling and pulverizing them.

A molded product (sheet-like cured product) can be obtained from the diallyl phthalate resin molding material of the present embodiment by a normal molding method such as injection molding, transfer molding, or compression molding.

Although the embodiments of the present invention have been described above, these are examples of the present invention, and various configurations other than those described above can be adopted. Moreover, the present invention is not limited to the above-described embodiments, and includes modifications, improvements, etc. within the scope of achieving the object of the present invention.

EXAMPLES The present invention will be described in detail below with reference to Examples, but the present invention is not limited to the description of these Examples.

<Resin molding material>
<Examples 1 to 3, Comparative Examples 1 to 3>
Each component was mixed according to the compounding ratio shown in Table 1, melted and kneaded with a heating roll at 90°C for 5 minutes, taken out, and pulverized into granules to obtain a diallyl phthalate resin molding material.

Information on raw material components shown in Table 1 is as follows.
(Diallyl phthalate prepolymer)
・ Diallyl phthalate prepolymer 1: diallyl phthalate resin (manufactured by Osaka Soda Co., Ltd., DAP-S, medium viscosity, ortho type, weight average molecular weight (converted to polystyrene): 3 to 4 × 10 ⁴ )
・ Diallyl phthalate prepolymer 2: diallyl phthalate resin (manufactured by Osaka Soda Co., Ltd., DAP-K, low viscosity, ortho type, weight average molecular weight (converted to polystyrene): 2 to 3 × 10 ⁴ )

(Diallyl phthalate monomer)
・ Diallyl phthalate monomer 1: manufactured by Osaka Soda Co., Ltd., product name: Daiso Dap Monomer

(reaction initiator)
-Reaction initiator 1: organic peroxide (thermal decomposition temperature (decomposition temperature for obtaining half-life in 1 minute): 175 ° C.) and organic peroxide (thermal decomposition temperature (half-life in 1 minute) decomposition temperature to obtain): 165 ° C.)

(filler)
・Glass fiber 1: manufactured by NSG, product name: RES015-BM42, average fiber diameter: 11 μm
・ Inorganic filler 1: manufactured by Denka, product name: FB-5D, average particle size: 4.7 μm

(Additive)
・ Additive 1: release agent (calcium stearate)

(pigment)
・Pigment 1: carbon black

<Comparative Examples 4 and 5>
Polyphenylene sulfide (PPS1, manufactured by Toray Industries, Inc., product name: A504X90) was used as the resin molding material of Comparative Example 4, and polyphenylene sulfide (PPS2, manufactured by Toray Industries, Inc., product name: A660EX) was used as the resin molding material of Comparative Example 5. .

The resin molding materials of each example and each comparative example were evaluated based on the following evaluation items. Table 1 shows the results.

<Liquidity>
Under the conditions of a mold temperature of 165° C. and an injection pressure of 27.6 MPa, the resin molding material of each example and each comparative example was injected into a rectangular channel having a width of 10 mm and a height of 0.25 mm. The distance from the upstream tip of the flow path to the end of the flow path through which the resin molding material flowed was obtained, and this distance was defined as the flow length (mm).

<Rigidity>
Using the resin molding material of each example and each comparative example, injection molding was performed under the conditions of gate size: 8 mm × 3 mm, injection pressure: 100 MPa, mold temperature: 165 ° C., filling time: 4 seconds, and the longitudinal direction was in the flow direction. A molded body was produced in the following manner. The flexural modulus (GPa) at 25° C. of the obtained molded product was measured according to JISK6911.

<Anisotropy>
(Procedure B)
Using the resin molding material of each example and each comparative example, injection molding was performed under the conditions of gate size: 8 mm × 3 mm, injection pressure: 100 MPa, mold temperature: 165 ° C., filling time: 4 seconds, and the longitudinal direction was in the flow direction. A compact of 80 mm×10 mm×4 mmt was produced in this way, and a test piece of 10 mm×10 mm×4 mmt was cut out from the compact.
Using the obtained test piece, the linear expansion coefficient α _MD (ppm/° C.) in the flow direction in the range of 25° C. to 120° C. under a compression condition of 5° C./min using a thermomechanical analyzer TMA, A coefficient of linear expansion α _TD (ppm/°C) in a direction perpendicular to the flow was calculated. Thermal expansion anisotropy was defined as α _TD /α _MD .

<Tracking resistance>
It was carried out according to IEC 60112.

<Flatness of thin molded product>
Using the resin molding material of each example and each comparative example, injection molding was performed under the following conditions: gate size: 8 mm x 3 mm, injection pressure: 100 MPa, mold temperature: 165°C, filling time: 4 seconds. A compact of 5 mmt was produced. On the surface (120 mm×120 mm) of the compact placed on a flat surface, 16 grid points were measured at equal intervals, and the height of the 16 points was measured using a three-dimensional measuring instrument. The difference between the maximum height and the minimum height of the 16 measurement results was taken as the amount of warpage (mm).
The calculated amount of warpage was evaluated based on the following evaluation criteria.
◎: Warp amount is 0.8 mm or less ○: Warp amount is over 0.8 mm, 1.2 mm or less △: Warp amount is over 1.2 mm, 1.6 mm or less ×: Warp amount is over 1.6 mm, 2.0 mm XX below: Warpage amount exceeds 2.0 mm, or molding is not possible

The diallyl phthalate resin molding materials of Examples 1 to 3 are excellent in flatness of thin molded products compared to Comparative Examples 1 to 5, and can realize thin molded products having excellent tracking resistance compared to Comparative Example 4. I found out. Moreover, the diallyl phthalate resin molding materials of Examples 1 to 3 were shown to be excellent in fluidity, rigidity and anisotropy.
The diallyl phthalate resin molding materials of Examples 1 to 3 can be suitably used for an insulating sheet sandwiched between two plate-shaped conductors.

Claims (8)

A diallyl phthalate resin molding material used for forming an insulating sheet sandwiched between two plate-shaped conductors,
comprising a diallyl phthalate prepolymer, a diallyl phthalate monomer, and a filler;
A diallyl phthalate resin molding material having a flow length of 60 mm or more and 200 mm or less, measured according to the following procedure A ,
The content of the diallyl phthalate prepolymer is 25 parts by mass or more and 45 parts by mass or less with respect to 100 parts by mass of the diallyl phthalate resin molding material,
A diallyl phthalate resin molding material, wherein the content of the diallyl phthalate monomer is 0.2 parts by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the diallyl phthalate prepolymer.
(Procedure A)
The diallyl phthalate resin molding material is injected into a rectangular channel having a width of 10 mm and a height of 0.25 mm under conditions of a mold temperature of 165° C. and an injection pressure of 27.6 MPa. The distance from the upstream end of the channel to the end of the channel through which the diallyl phthalate resin molding material flows is obtained, and this distance is defined as the flow length (mm). The diallyl phthalate resin molding material according to claim 1 ,
The content of the filler is 90 parts by mass or more and 250 parts by mass or less with respect to 100 parts by mass of the diallyl phthalate prepolymer.
Diallyl phthalate resin molding material. The diallyl phthalate resin molding material according to claim 1 or 2 ,
The thermal expansion anisotropy of the diallyl phthalate resin molding material measured according to the following procedure B is 1.0 or more and 2.3 or less,
The flexural modulus of the diallyl phthalate resin molding material at 25° C. measured according to the following procedure C is 11.5 GPa or more and 30 GPa or less.
Diallyl phthalate resin molding material.
(Procedure B)
Using the diallyl phthalate resin molding material, injection molding is performed under the conditions of gate size: 8 mm × 3 mm, injection pressure: 100 MPa, mold temperature: 165 ° C., filling time: 4 seconds, so that the longitudinal direction is the flow direction. A compact of 80 mm×10 mm×4 mmt is produced, and a test piece of 10 mm×10 mm×4 mmt is cut out from the compact. Using the obtained test piece, the linear expansion coefficient α _MD in the flow direction and the coefficient A directional linear expansion coefficient α _TD is calculated. Let the thermal expansion anisotropy be α _TD /α _MD .
(Procedure C)
Using the diallyl phthalate resin molding material, injection molding is performed under the conditions of gate size: 8 mm × 3 mm, injection pressure: 100 MPa, mold temperature: 165 ° C., filling time: 4 seconds, so that the longitudinal direction is the flow direction. A molded body is produced, and the flexural modulus (GPa) at 25° C. of the molded body is measured according to JISK6911. The diallyl phthalate resin molding material according to any one of claims 1 to 3 ,
A diallyl phthalate resin molding material, wherein the filler includes a fibrous inorganic filler and a non-fibrous inorganic filler. The diallyl phthalate resin molding material according to any one of claims 1 to 4 ,
A diallyl phthalate resin molding material containing a reaction initiator. The diallyl phthalate resin molding material according to claim 5 ,
A diallyl phthalate resin molding material, wherein the reaction initiator contains an organic peroxide. The diallyl phthalate resin molding material according to claim 5 ,
A diallyl phthalate resin molding material, wherein the reaction initiator has a decomposition temperature of 150° C. to 200° C. for obtaining a half-life of 1 minute. An electronic/electric device component having at least two plate-shaped conductors and an insulating sheet sandwiched between the two plate-shaped conductors,
An electronic/electric device, wherein the insulating sheet comprises a cured product of the diallyl phthalate resin molding material according to any one of claims 1 to 7 .