JPS5814411A - Condenser - 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] This invention relates to capacitors.

As electrical equipment has become smaller in recent years, the capacitors used there have also been required to be smaller and have higher performance. In conventional capacitors, polymeric materials such as polypropylene and polystyrene are widely used as thin dielectric materials, but their dielectric constants are low, ranging from 2 to 4, so they are not sufficient for capacitors. It is impossible to become a small person.

In view of the above-mentioned matters, this invention was made by "C-operation".
This is a new capacitor that uses a polymeric dielectric material with a large dielectric constant.

The invention of B is characterized by a polymer-electrolyte-containing polymer obtained by dispersing an iminium dicationic acid a8-tetracyanoquinodimethane complex salt in an insulating polymer.

The general formula of the iminium dication-7,7,8,8-tetracyanoquinodimethane complex salt (hereinafter simply referred to as complex salt) is as follows.

However, H or OHs is used for hat, l is 2 or 3, and m is 5.
or 4, and '1'CNQ represents the general formula.

Insulating polymers to be blended include thermoplastic or thermosetting III! Examples of the thermoplastic resin, which may be any one of 1, include polyolefin resins such as polystyrene and polypropylene, polyester resins such as 4-ethylene terephthalate and polyethylene naphthalate, or polyvinyl chloride, polyvinyl alcohol, 1-rivinyl butyral,
Polystyrene, nylon, l-lymethylpentene, polysulfone, etc. can be used. Further, as the thermosetting resin, polyester resin, phenol resin, polyurethane resin, etc. can be used.

In order to blend a complex salt into a thermoplastic resin, it is possible to use a solvent that dissolves only the complex salt and mix it with the melt or molten material of the thermoplastic resin, or a solvent that can dissolve both may be used. A film-like polymeric dielectric may be obtained by mixing predetermined amounts of the two and using a casting method, an inflating method, a tintering method, or the like.

As the solvent, dimethylformamide, dimethylacetamide-based solvents, and halogen-based organic solvents such as dichloromethane may be used alone or in combination. In short, any material may be used as long as it can mix both of the above components.
To blend into a thermosetting resin, the complex salt is dissolved in a solvent such as dimethylformamide, mixed into the resin, stirred and mixed, and then the solvent is removed by scattering by applying and reducing pressure. A desired polymer dielectric may be obtained by adding a resin curing agent.

In addition, the mixing ratio of complex salt is α for blending with ξ.
It is preferable to set it as the range of 5-4wt4.

This is because if the mixing ratio is less than Q, 5wt%, the effect of improving the dielectric constant is small, and 4. When Qwt% is exceeded, the specific resistance becomes 1
This is because the value decreases to less than 0.010 ohm α, making it undesirable as a dielectric material.

Next, embodiments of this invention will be described. First, a complex salt having the structural formula shown below and a polypropylene resin are used.
Add in the proportions shown in the table, mix uniformly, and then use the inflator method. ) The three 25-μm-thick polymer-electric materials prepared above were stacked to form a thin dielectric layer, and a capacitor element made by wrapping this and aluminum foil was impregnated with the insulating oil shown in Table 1 to form a power supply. Samples (Mus. 1 to 6), which are all-film capacitors, were manufactured.

The right column of Table 1 shows the -electricity rates of the samples (41 to 6);
The AC withstand voltage potential gradient (ACL) and the volume ratio of the capacitor element after 10' seconds are shown. For reference, the same table also shows the characteristics of an all-film capacitor for power use (conventional example) (7) using a conventional polypropylene film to which no complex salts are added. Also, the volume ratio of the capacitor element in the table is ail'' (however, Fi=ACL)
Find the value calculated in , set the conventional example (Mu7) as 100%,
The ratios of the samples (41 to 6) are clearly shown.

As can be understood from Table 1, the test products (41 to 46) using polymer dielectrics to which complex salts have been added are the conventional examples (Todoroki 7).
Although the Bem CL is low compared to the capacitor element, since the dielectric constant is large, the volume of the capacitor element can be made very small.

Next, another embodiment of the invention of B will be described.

A 25-μm-thick polymer was prepared by adding the complex salts of the structural formulas (11) and (b) described above and polypropylene resin in the proportions shown in the 1 liter Z table, mixing them uniformly, and then using the inflation thickening method. Three dielectrics are stacked together to form a thin dielectric layer, and a capacitor element is wrapped with aluminum foil and impregnated with alkyl diphenylethane to form a DC all-film capacitor. )
, was produced.

#I2 The right column of Table 2 shows the dielectric constant of the sample (A a 9.'), the DC charging potential gradient (DCL) when the non-oscillatory waveform was applied 104 times, and the energy density ratio of the capacitor. show. For reference, the same table also shows the characteristics of a DC all-film capacitor (conventional example) using a conventional polypropylene film to which no complex salts have been added. or,
The energy density ratio of the capacitor in the table is calculated using 113 (1=DcL), and the conventional example (jKl
o) is 1.0, and the ratio of the sample (&a9) is clearly shown.

As can be seen from Table 2, the sample (48, 9) using a polymer dielectric with complex salt added is the conventional example (Mu10).
Although the DCL is lower than that of the capacitor, the dielectric constant is large, so the energy density of the capacitor is large. Heat Relief ζIf the energy density is the same as the conventional one, this ■capacitor can be made smaller.

Next, still another embodiment of the invention will be described. A complex salt having the above-mentioned structural formula (Otori) and polyethylene terephthalate (G) was added in the proportions shown in Table 5, mixed uniformly, and then cast to a thickness of 6 μm.
The sample is a metal-deposited capacitor (
411,12) were produced.

Table 3 shows the dielectric constant-ACL and the volume ratio of the capacitor element,
For reference, the same table also shows metal-deposited condensate using conventional polyethylene terephthalate without the addition of complex salts. (Conventional example) characteristics are also shown. Also, the volume ratio of the capacitor element in the table is C1'' (1-ACL)
The calculated value is determined, the conventional example (A13) is set as 1004, and the ratio of the sample (A I 1°12) is clearly shown.

As can be seen from Table 113, the sample (JKll, 12) using a polymeric dielectric material to which complex salts have been added is different from the conventional example (
Although the ACL is lower than that of 413), since the dielectric constant is large, the volume of the capacitor element can be made extremely small.

As detailed above, according to the present invention, by using a polymeric dielectric material made of a complex salt dispersed in an insulating polymer,
This type of capacitor can be made smaller or its energy density can be improved.

patent applicant Nissin Electric Co., Ltd. CEO Company: Masakatsu Nagayamawaki

Claims (1)

[Claims] A capacitor equipped with a polymeric dielectric material made by dispersing an iminium dication-susu a8-tetracyanoquinodimethane complex salt in an insulating polymer.