JPH0482172B2 - - Google Patents
Info
- Publication number
- JPH0482172B2 JPH0482172B2 JP62148700A JP14870087A JPH0482172B2 JP H0482172 B2 JPH0482172 B2 JP H0482172B2 JP 62148700 A JP62148700 A JP 62148700A JP 14870087 A JP14870087 A JP 14870087A JP H0482172 B2 JPH0482172 B2 JP H0482172B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic capacitor
- agent
- flame
- foaming agent
- flame retardant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000003990 capacitor Substances 0.000 claims description 27
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 15
- 239000003063 flame retardant Substances 0.000 claims description 15
- 238000006297 dehydration reaction Methods 0.000 claims description 11
- 239000004088 foaming agent Substances 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 239000004604 Blowing Agent Substances 0.000 claims description 7
- 230000018044 dehydration Effects 0.000 claims description 7
- 238000010000 carbonizing Methods 0.000 claims description 6
- 239000003054 catalyst Substances 0.000 claims description 5
- 239000003566 sealing material Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000006260 foam Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 239000004254 Ammonium phosphate Substances 0.000 description 3
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 3
- 235000019289 ammonium phosphates Nutrition 0.000 description 3
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 2
- XUMBMVFBXHLACL-UHFFFAOYSA-N Melanin Chemical compound O=C1C(=O)C(C2=CNC3=C(C(C(=O)C4=C32)=O)C)=C2C4=CNC2=C1C XUMBMVFBXHLACL-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Description
〔産業上の利用分野〕
この発明は難燃化電解コンデンサに係り、例え
ば防爆弁動作時に引火等で生ずる電解液の火災を
最小限に抑制する電解コンデンサに関する。
〔従来の技術〕
一般に、電解コンデンサに過大な電気ストレス
が加えられると、防爆機能を有する防爆弁等が作
動するが、電解コンデンサ素子が約200℃以上に
発熱し、電解液が発火する場合があつた。
そのため、従来このような弊害を防止する手段
として、電解コンデンサの内部あるいは外部に温
度ヒユーズ等の通電遮断手段を具備したもの、あ
るいは電解コンデンサ素子を収納する外装ケース
を多重構造とし、この複数の外装ケースの間隙に
消火剤を封入したもの等があつた。
〔発明が解決しようとする問題点〕
従来の外装ケースの多重構造によるものは構造
が複雑であり、製造工程の復雑化、部品点数の増
加に伴うコスト増等を招来していた。
また、電解コンデンサの内部あるいは外部に通
電遮断手段を具備したものは、電解コンデンサの
構造が複雑になるとともに、電解コンデンサの肥
大化を招き、小型の電解コンデンサでは採用し得
ないものであつた。更に、急激な温度上昇に伴う
発火事故に対応することができない場合があつ
た。
〔問題点を解決する手段〕
この発明は、炭化剤、脱水触媒および発泡剤を
基本組成とする難燃発泡剤を電解コンデンサに塗
布するこのを特徴としている。
また、前記難燃発泡剤の塗布部分は、電解コン
デンサのセパレータ、電解コンデンサの外装ケー
ス内表面、電解コンデンサ素子外表面、封口材内
表面またはこれらの組合せ部より選択されること
を特徴としている。
〔作用〕
この難燃発泡剤は、一般に、OH基をも持つ化
合物、炭水化物、多価アルコール、フエノールま
たはこれらの組み合わせより選択される炭化剤と
リン酸アンモニウムからなる脱水触媒、およびリ
ン酸アンモニウム、尿素、メラニン、グアニジン
またはこれらの組み合わせより選択される発泡剤
等からなる。そして、発火等による熱を受ける
と、その基本組成である炭化剤が脱水反応して炭
素のみの層になり、脱水触媒は前記炭化剤が発熱
により分解して可燃性ガスを放出する前に炭化剤
と反応してエステル化して脱水反応、すなわち脱
水分解吸熱反応を生じさせる。更に、発泡剤は、
熱分解によりN2を出し、脱水分解吸熱反応によ
つて生じたH2O（ｇ）とともに発泡層ガスになる
とともに酸素を希釈する。
すなわち難燃発泡剤は、発火による温度上昇に
伴い、断熱発泡炭化層を形成し、熱および酸素を
遮断し、また脱水分解吸熱反応によつて温度を下
げ、更に、不燃性ガスを発生させて発泡財源と
し、酸素を希釈する機能を有している。そして、
難燃発泡剤が発熱に反応した場合、発泡層の膜厚
はもとの塗膜層の数百倍となり、また、発泡層は
不燃性ガスであるため熱伝導率はもとの1/10〜1/
２０となる。また、炭化層が酸素の供給を遮断する
ので、難燃効果、遅炎効果があり、電解コンデン
サの延焼を防止することができる。
〔実施例〕
以下この発明を実施例により説明する。
実施例 １
セルローズ、フエノール（炭化剤）、リン酸ア
ンモニウム（脱水触媒）およびメラミン（発泡
剤）を基本組成とする難燃性発泡剤を、定格電圧
200WV、定格静電容量470μFの電解コンデンサ
の外装ケースの内表面に１ｇ／10cm2塗布した。
実施例 ２
実施例１と同じ組成からなる難燃性発泡剤を、
実施例１と同一定格の電解コンデンサ素子の表面
に１ｇ／10cm2塗布した。
実施例 ３
実施例１〜２と同一定格で、難燃性発泡剤を塗
布しない電解コンデンサを従来例として準備し
た。これらの各試料を各10個用意し、各試料に
300Vの過電圧を印加して電圧印加後の発火の有
無、発火後の消化時間を測定した。その結果を次
に示す。
[Industrial Application Field] The present invention relates to a flame-retardant electrolytic capacitor, and more particularly, to an electrolytic capacitor that minimizes fires caused by electrolyte caused by ignition during the operation of an explosion-proof valve. [Prior art] Generally, when excessive electrical stress is applied to an electrolytic capacitor, an explosion-proof valve with an explosion-proof function operates, but the electrolytic capacitor element may generate heat of approximately 200°C or more, causing the electrolyte to catch fire. It was hot. Therefore, as a conventional means to prevent such adverse effects, electrolytic capacitors are equipped with a current cutoff means such as a temperature fuse inside or outside, or a multi-layered exterior case is used to house the electrolytic capacitor elements. There was something filled with extinguishing agent in the gap between the cases. [Problems to be Solved by the Invention] Conventional exterior cases with multiple structures have complicated structures, leading to complicated manufacturing processes and increased costs due to an increase in the number of parts. Further, an electrolytic capacitor provided with a current cutoff means inside or outside would complicate the structure of the electrolytic capacitor and cause the electrolytic capacitor to become bulky, making it impossible to use it as a small electrolytic capacitor. Furthermore, there were cases in which it was not possible to respond to fire accidents caused by rapid temperature rises. [Means for Solving the Problems] The present invention is characterized in that a flame retardant foaming agent whose basic composition is a carbonizing agent, a dehydration catalyst, and a foaming agent is applied to an electrolytic capacitor. The flame retardant foaming agent is applied to a portion selected from a separator of an electrolytic capacitor, an inner surface of an exterior case of an electrolytic capacitor, an outer surface of an electrolytic capacitor element, an inner surface of a sealing material, or a combination thereof. [Function] This flame retardant foaming agent generally comprises a carbonizing agent selected from a compound having an OH group, a carbohydrate, a polyhydric alcohol, a phenol, or a combination thereof, a dehydration catalyst consisting of ammonium phosphate, and ammonium phosphate. It consists of a blowing agent selected from urea, melanin, guanidine, or a combination thereof. When it receives heat from ignition, etc., the carbonizing agent, which is its basic composition, undergoes a dehydration reaction and becomes a layer of only carbon. It reacts with the agent to esterify and cause a dehydration reaction, that is, a dehydration decomposition endothermic reaction. Furthermore, the blowing agent is
N 2 is released by thermal decomposition, and together with H 2 O (g) generated by the dehydration decomposition endothermic reaction, it becomes a foaming layer gas and dilutes oxygen. In other words, as the temperature rises due to ignition, flame-retardant foaming agents form an insulating foam carbonized layer to block heat and oxygen, lower the temperature through an endothermic dehydration reaction, and further generate nonflammable gas. It serves as a foam source and has the function of diluting oxygen. and,
When the flame retardant foaming agent reacts with heat generation, the thickness of the foam layer becomes several hundred times that of the original coating layer, and since the foam layer is a nonflammable gas, the thermal conductivity is 1/10 of the original thickness. ~1/
It becomes 20. Furthermore, since the carbonized layer blocks the supply of oxygen, it has a flame retardant effect and a flame retarding effect, and can prevent the spread of fire in the electrolytic capacitor. [Example] The present invention will be explained below with reference to Examples. Example 1 A flame-retardant blowing agent whose basic composition is cellulose, phenol (carbonizing agent), ammonium phosphate (dehydration catalyst), and melamine (blowing agent) was used at the rated voltage.
1 g/10 cm 2 was applied to the inner surface of the outer case of an electrolytic capacitor with a 200 WV and rated capacitance of 470 μF. Example 2 A flame retardant blowing agent having the same composition as in Example 1 was used.
A coating of 1 g/10 cm 2 was applied to the surface of an electrolytic capacitor element having the same rating as in Example 1. Example 3 An electrolytic capacitor having the same rating as Examples 1 and 2 and not coated with a flame retardant foaming agent was prepared as a conventional example. Prepare 10 of each of these samples, and
An overvoltage of 300 V was applied, and the presence or absence of ignition after voltage application and the extinguishing time after ignition were measured. The results are shown below.
以上のようにこの発明は、炭化剤、脱水触媒お
よび発泡剤を基本組成とする難燃発泡剤を電解コ
ンデンサに塗布することを特徴とし、また、前記
難燃発泡剤の塗布部分は、電解コンデンサのセパ
レータ、電解コンデンサの外装ケース内表面、電
解コンデンサ素子外表面、封口材内表面またはこ
れらの組合せ部より選択されることを特徴として
いるので、電解コンデンサに過大な電気ストレス
が加えられ電解コンデンサ素子が発熱した場合、
難燃発泡剤が断熱発泡炭化層を形成し、熱および
酸素を遮断し、また脱水分解吸熱反応によつて温
度を下げるとともに不燃性ガスを発生させて酸素
を希釈するので、電解液の発火を防止し、あるい
は発火してもただちに自己消火機能を果たし、電
子機器内の他の電子部品に延焼することがなくな
る。
As described above, the present invention is characterized in that a flame retardant foaming agent whose basic composition is a carbonizing agent, a dehydration catalyst, and a blowing agent is applied to an electrolytic capacitor, and the part where the flame retardant foaming agent is applied is The separator, the inner surface of the outer case of the electrolytic capacitor, the outer surface of the electrolytic capacitor element, the inner surface of the sealant, or a combination thereof, is characterized by the fact that excessive electrical stress is applied to the electrolytic capacitor and the electrolytic capacitor element If you have a fever,
The flame-retardant foaming agent forms a heat-insulating foam carbonized layer that blocks heat and oxygen, lowers the temperature through an endothermic dehydration reaction, and generates non-flammable gas to dilute oxygen, preventing the electrolyte from igniting. The self-extinguishing function is performed immediately even if a fire occurs, and the fire does not spread to other electronic components in the electronic device.
Claims (1)
ンデンサの外装ケース内表面、電解コンデンサ素
子外表面、封口材内表面またはこれらの組合せよ
り選択される表面に、炭化剤、脱水触媒および発
泡剤を基本組成とする難燃発泡剤を塗布した難燃
化電解コンデンサ。1. Carbonizing agent, dehydration catalyst, and blowing agent are basically added to the surface of the separator of the electrolytic capacitor, the inner surface of the outer case of the electrolytic capacitor, the outer surface of the electrolytic capacitor element, the inner surface of the sealing material, or a combination thereof. A flame-retardant electrolytic capacitor coated with a flame-retardant foaming agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62148700A JPS63312623A (en) | 1987-06-15 | 1987-06-15 | Fire retardant electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62148700A JPS63312623A (en) | 1987-06-15 | 1987-06-15 | Fire retardant electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63312623A JPS63312623A (en) | 1988-12-21 |
| JPH0482172B2 true JPH0482172B2 (en) | 1992-12-25 |
Family
ID=15458643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62148700A Granted JPS63312623A (en) | 1987-06-15 | 1987-06-15 | Fire retardant electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63312623A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018155281A1 (en) * | 2017-02-24 | 2018-08-30 | 日本ゼオン株式会社 | Electrode for electrochemical element, and electrochemical element |
-
1987
- 1987-06-15 JP JP62148700A patent/JPS63312623A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63312623A (en) | 1988-12-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |