JPH0572500B2 - - Google Patents
Info
- Publication number
- JPH0572500B2 JPH0572500B2 JP2705586A JP2705586A JPH0572500B2 JP H0572500 B2 JPH0572500 B2 JP H0572500B2 JP 2705586 A JP2705586 A JP 2705586A JP 2705586 A JP2705586 A JP 2705586A JP H0572500 B2 JPH0572500 B2 JP H0572500B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- sheet
- moles
- electrical resistance
- 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
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 239000004014 plasticizer Substances 0.000 claims description 8
- 125000004432 carbon atom Chemical group C* 0.000 claims description 7
- 229920001577 copolymer Polymers 0.000 claims description 7
- 239000003792 electrolyte Substances 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 5
- 150000003014 phosphoric acid esters Chemical class 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 4
- 125000002947 alkylene group Chemical group 0.000 claims description 4
- 239000004917 carbon fiber Substances 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 239000011342 resin composition Substances 0.000 claims description 4
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 125000002723 alicyclic group Chemical group 0.000 claims description 3
- 125000001931 aliphatic group Chemical group 0.000 claims description 3
- 125000003010 ionic group Chemical group 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical group CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 14
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 10
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 9
- 229920001971 elastomer Polymers 0.000 description 9
- 229920003023 plastic Polymers 0.000 description 8
- 239000004033 plastic Substances 0.000 description 8
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 230000005611 electricity Effects 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 239000006229 carbon black Substances 0.000 description 5
- -1 phosphate ester Chemical class 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 4
- 239000003381 stabilizer Substances 0.000 description 4
- 239000002216 antistatic agent Substances 0.000 description 3
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 2
- BBMCTIGTTCKYKF-UHFFFAOYSA-N 1-heptanol Chemical compound CCCCCCCO BBMCTIGTTCKYKF-UHFFFAOYSA-N 0.000 description 2
- HIWGDJVTAWTBNH-UHFFFAOYSA-N 2-methylidene-5-sulfopentanoic acid Chemical compound OC(=O)C(=C)CCCS(O)(=O)=O HIWGDJVTAWTBNH-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 2
- 206010014357 Electric shock Diseases 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- MWKFXSUHUHTGQN-UHFFFAOYSA-N decan-1-ol Chemical compound CCCCCCCCCCO MWKFXSUHUHTGQN-UHFFFAOYSA-N 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 2
- 238000007786 electrostatic charging Methods 0.000 description 2
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 2
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 2
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- ZWRUINPWMLAQRD-UHFFFAOYSA-N nonan-1-ol Chemical compound CCCCCCCCCO ZWRUINPWMLAQRD-UHFFFAOYSA-N 0.000 description 2
- REIUXOLGHVXAEO-UHFFFAOYSA-N pentadecan-1-ol Chemical compound CCCCCCCCCCCCCCCO REIUXOLGHVXAEO-UHFFFAOYSA-N 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- HLZKNKRTKFSKGZ-UHFFFAOYSA-N tetradecan-1-ol Chemical compound CCCCCCCCCCCCCCO HLZKNKRTKFSKGZ-UHFFFAOYSA-N 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- TYQJZSUFVCFCDA-UHFFFAOYSA-N 2-(1,7-disulfoheptan-4-ylidene)butanedioic acid Chemical compound OS(=O)(=O)CCCC(=C(C(O)=O)CC(=O)O)CCCS(O)(=O)=O TYQJZSUFVCFCDA-UHFFFAOYSA-N 0.000 description 1
- LIAWCKFOFPPVGF-UHFFFAOYSA-N 2-ethyladamantane Chemical compound C1C(C2)CC3CC1C(CC)C2C3 LIAWCKFOFPPVGF-UHFFFAOYSA-N 0.000 description 1
- DNHDSWZXBHTLDP-UHFFFAOYSA-N 3-(2-ethenylpyridin-1-ium-1-yl)propane-1-sulfonate Chemical compound [O-]S(=O)(=O)CCC[N+]1=CC=CC=C1C=C DNHDSWZXBHTLDP-UHFFFAOYSA-N 0.000 description 1
- BCAIDFOKQCVACE-UHFFFAOYSA-N 3-[dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]azaniumyl]propane-1-sulfonate Chemical compound CC(=C)C(=O)OCC[N+](C)(C)CCCS([O-])(=O)=O BCAIDFOKQCVACE-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 description 1
- WOURXYYHORRGQO-UHFFFAOYSA-N Tri(3-chloropropyl) phosphate Chemical compound ClCCCOP(=O)(OCCCCl)OCCCCl WOURXYYHORRGQO-UHFFFAOYSA-N 0.000 description 1
- PQYJRMFWJJONBO-UHFFFAOYSA-N Tris(2,3-dibromopropyl) phosphate Chemical compound BrCC(Br)COP(=O)(OCC(Br)CBr)OCC(Br)CBr PQYJRMFWJJONBO-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 description 1
- 229910001626 barium chloride Inorganic materials 0.000 description 1
- 229960003237 betaine Drugs 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 235000011148 calcium chloride Nutrition 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical class [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- SEGLCEQVOFDUPX-UHFFFAOYSA-N di-(2-ethylhexyl)phosphoric acid Chemical compound CCCCC(CC)COP(O)(=O)OCC(CC)CCCC SEGLCEQVOFDUPX-UHFFFAOYSA-N 0.000 description 1
- HTDKEJXHILZNPP-UHFFFAOYSA-N dioctyl hydrogen phosphate Chemical compound CCCCCCCCOP(O)(=O)OCCCCCCCC HTDKEJXHILZNPP-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010556 emulsion polymerization method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000000040 green colorant Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229940071264 lithium citrate Drugs 0.000 description 1
- WJSIUCDMWSDDCE-UHFFFAOYSA-K lithium citrate (anhydrous) Chemical compound [Li+].[Li+].[Li+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O WJSIUCDMWSDDCE-UHFFFAOYSA-K 0.000 description 1
- INHCSSUBVCNVSK-UHFFFAOYSA-L lithium sulfate Inorganic materials [Li+].[Li+].[O-]S([O-])(=O)=O INHCSSUBVCNVSK-UHFFFAOYSA-L 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 235000011147 magnesium chloride Nutrition 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 235000002639 sodium chloride Nutrition 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010558 suspension polymerization method Methods 0.000 description 1
- RBTVSNLYYIMMKS-UHFFFAOYSA-N tert-butyl 3-aminoazetidine-1-carboxylate;hydrochloride Chemical compound Cl.CC(C)(C)OC(=O)N1CC(N)C1 RBTVSNLYYIMMKS-UHFFFAOYSA-N 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- QJAVUVZBMMXBRO-UHFFFAOYSA-N tripentyl phosphate Chemical compound CCCCCOP(=O)(OCCCCC)OCCCCC QJAVUVZBMMXBRO-UHFFFAOYSA-N 0.000 description 1
- WTLBZVNBAKMVDP-UHFFFAOYSA-N tris(2-butoxyethyl) phosphate Chemical compound CCCCOCCOP(=O)(OCCOCCCC)OCCOCCCC WTLBZVNBAKMVDP-UHFFFAOYSA-N 0.000 description 1
- HQUQLFOMPYWACS-UHFFFAOYSA-N tris(2-chloroethyl) phosphate Chemical compound ClCCOP(=O)(OCCCl)OCCCl HQUQLFOMPYWACS-UHFFFAOYSA-N 0.000 description 1
- XHTMGDWCCPGGET-UHFFFAOYSA-N tris(3,3-dichloropropyl) phosphate Chemical compound ClC(Cl)CCOP(=O)(OCCC(Cl)Cl)OCCC(Cl)Cl XHTMGDWCCPGGET-UHFFFAOYSA-N 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Conductive Materials (AREA)
- Non-Insulated Conductors (AREA)
- Floor Finish (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Description
[産業上の利用分野]
本発明は、自由に着色可能であつて十分な帯電
防止性能を有する導電性床シートに関するもので
ある。
[従来の技術]
ゴムあるいはプラスチツク成形品において、静
電気の帯電を防止する対策としては、成形品の電
気抵抗を下げ、摩擦によつて生じた静電気を素早
く接地して逃がしてやることである。
ゴムあるいはプラスチツクの電気抵抗を下げる
方法としては次のようなものがこれまでに知られ
ている。
(1) ゴムあるいはプラスチツクに導電性の高い
銀、銅、ステンレス、ニツケル等の金属粉や繊維を
添加する方法。
(2) ゴムあるいはプラスチツクにカーボンブラツ
クやカーボン繊維を添加する方法。
(3) ゴムあるいはプラスチツクに帯電防止剤と呼
ばれる界面活性剤やこれに類するものを添加する方
法。
[発明が解決しようとする問題点]
(1)の方法は静電帯電防止には非常に効果的であ
るが、自由に色に着色できず、メタリツク色に制
限される。また、非常に高価であり経済性に欠け
る。
さらに、成形品の電気抵抗は低圧電気による感
電の危険性を防止するために一定の範囲以内であ
るのが望ましいが、金属粉や金属繊維を用いてこ
のようなものを安定して製造することは非常に困
難である。
(2)の方法では、特にカーボンブラツクは安価な
導電性付与剤としてよく使用されているが、色相
が黒色に制限されてしまうという欠点がある。ま
た、この方法によつても低圧電気による感電の危
険性のない範囲の成形品を工業的に安定して製造
すること困難である。
(3)の方法は自由に着色できるという長所がある
ものの、ゴムやプラスチツクとの相溶性が悪く、
吸湿しやすい界面活性剤を練り込み、これを表面
にブリードさせて表面抵抗を下げ、静電気を表面
から逃がすことによつて得られるので、表面抵抗
という環境条件に左右されやすい電気抵抗に頼つ
ており、帯電防止性能の安定性に欠ける。特に、
低湿度の環境では帯電防止効果が相当に低下する
ことになる。また、帯電防止性能の持続期間が短
い。
一方、近年IC、LSIなどの半導体部品や電子機
器工場等においては静電気の発生によるミクロン
単位、サブミクロン単位のチイやほこりの吸着に
よる生産障害の発生防止のため、またOAルーム
等においては静電気によるコンピユータの誤動
作、回路破壊防止のために導電性床の使用が検討
されてきている。
この場合、美観上から自由に着色できる(3)の方
法によつて得たシートの使用が好ましいが、静電
気の帯電防止性能に不安があり単独での使用は困
難である。この対策として(3)の方法によつて得た
シートを表側にし、(1)または(2)の方によつて得た
導電性を高くできるシートを裏側にして積層した
シートの使用が考えられる。
このような積層シートでは、表側に帯電した静
電気を裏側の導電層にリークさせて接地させるこ
とになるが、この場合表面抵抗よりも体積抵抗が
重要であり、界面活性剤やこれに類した帯電防止
剤と呼ばれるものを添加した(3)の方法によるシー
トでは体積抵抗を低下できず、十分な帯電防止効
果が得られないことになる。
本発明は上記に基いてなされたものであり、自
由な色彩に着色でき、しかも優れた帯電防止性能
を有する導電性床シートの提供を目的とするもの
である。
[問題点を解決するための手段]
本発明の導電性床シートは、塩化ビニルと分子
内にイオン性基および反応性二重結合を有するモ
ノマとの共重合体100重量部に対して一般式
[Industrial Field of Application] The present invention relates to a conductive floor sheet that can be freely colored and has sufficient antistatic performance. [Prior Art] A measure to prevent static electricity from forming on rubber or plastic molded products is to lower the electrical resistance of the molded product and quickly ground and dissipate static electricity generated by friction. The following methods have been known to lower the electrical resistance of rubber or plastic. (1) A method of adding highly conductive metal powder or fibers such as silver, copper, stainless steel, or nickel to rubber or plastic. (2) A method of adding carbon black or carbon fiber to rubber or plastic. (3) A method of adding surfactants called antistatic agents or similar substances to rubber or plastic. [Problems to be Solved by the Invention] Although the method (1) is very effective in preventing electrostatic charging, it cannot be colored freely and is limited to metallic colors. Moreover, it is very expensive and lacks economic efficiency. Furthermore, it is desirable that the electrical resistance of the molded product be within a certain range to prevent the risk of electric shock due to low-voltage electricity, but it is difficult to stably manufacture such a product using metal powder or metal fiber. is extremely difficult. In method (2), carbon black is often used as an inexpensive conductivity imparting agent, but it has the disadvantage that the hue is limited to black. Moreover, even with this method, it is difficult to industrially and stably produce molded products that are free from the risk of electric shock due to low voltage electricity. Although method (3) has the advantage of being able to be colored freely, it has poor compatibility with rubber and plastic.
This is achieved by incorporating a surfactant that easily absorbs moisture and allowing it to bleed onto the surface to lower the surface resistance and dissipate static electricity from the surface, so it relies on surface resistance, an electrical resistance that is easily affected by environmental conditions. , lacking stability in antistatic performance. especially,
In a low humidity environment, the antistatic effect will be considerably reduced. Moreover, the duration of antistatic performance is short. On the other hand, in recent years, semiconductor parts such as IC, LSI, and electronic equipment factories are being used to prevent production failures due to the adsorption of micron and submicron chips and dust due to the generation of static electricity, and in office automation rooms, etc. The use of conductive floors is being considered to prevent computer malfunctions and circuit damage. In this case, from the viewpoint of aesthetics, it is preferable to use a sheet obtained by method (3), which can be colored freely, but it is difficult to use it alone due to concerns about its antistatic performance. As a countermeasure to this problem, it is possible to use a laminated sheet with the sheet obtained by method (3) on the front side and the sheet with higher conductivity obtained by method (1) or (2) on the back side. . In such a laminated sheet, static electricity charged on the front side leaks to the conductive layer on the back side and is grounded, but in this case, volume resistance is more important than surface resistance, and surfactants and similar charged A sheet produced by method (3) in which something called an inhibitor is added cannot lower the volume resistivity, and a sufficient antistatic effect cannot be obtained. The present invention has been made based on the above, and aims to provide a conductive floor sheet that can be colored in any color and has excellent antistatic performance. [Means for Solving the Problems] The conductive floor sheet of the present invention has the general formula:
【化】
(式中、Xは炭素数2〜8の脂肪族もしくは脂環
式の二塩基酸残基を、Rは同一又は異なつてもよ
い炭素数3〜15の直鎖又は分岐のアルキル基を、
Aは炭素数2〜4のアルキレン基をそれぞれ表
し、m、nは同一又は異なつてもよい1〜7の整
数である。ただし、A+Rの合計炭素数は5〜17
とする。)で表される可塑剤を5〜100重量部、リ
ン酸エステルを5〜100重量部および電解質を
0.01〜5重量部含有せしめた樹脂組成物からなる
第一のシートと、ゴムまたはプラスチツクにカー
ボンブラツク、カーボン繊維、金属粉および金属
繊維のうち少なくとも一種を含有せしめた樹脂組
成物からなる上記第一のシートよりも導電性が大
きな第二のシートを積層してなることを特徴とす
るものである。
本発明において、塩化ビニルと共重合させる分
子内にイオン性基および反応性2重結合を有する
モノマとしては、(3−スルホプロピル)−アクリ
ル酸エステルカリウム塩、(3−スルホプロピル)
−メタアクリル酸エステルカリウム塩、ビス(3
−スルホプロピル)−イタコン酸エステルカリウ
ム塩、N−(3−スルホプロピル)−N−メタクロ
イルオキシエチル−N,N−ジメチル−アンモニ
ウム−ベタイン、N−(3−スルホプロピル)−N
−メタクロイルアミドプロピル−N,N−ジメチ
ル−アンモニウム−ベタイン、1−(3−スルホ
プロピル)−2−ビニル−ピリジニウム−ベタイ
ン等があげられる。
塩化ビニルと分子内にイオン性基および反応性
2重結合を有するモノマとの共重合体(以下「塩
化ビニル共重合体」という)における後者のモノ
マの含有量は、5〜50重量%の範囲とするのが好
ましく、5重量%未満であると良好な電気抵抗が
得られにくくなる傾向にあり、50重量%を超える
とリン酸エステルとの相溶性が悪くなると共に機
械的強度が低下する傾向にある。かかる塩化ビニ
ル共重合体を得る方法は特に限定するものではな
く、懸濁重合法、乳化重合法のいずれでもよい。
本発明において、一般式[Formula, X is an aliphatic or alicyclic dibasic acid residue having 2 to 8 carbon atoms, and R is a linear or branched alkyl group having 3 to 15 carbon atoms, which may be the same or different. of,
A represents an alkylene group having 2 to 4 carbon atoms, and m and n are integers of 1 to 7 which may be the same or different. However, the total carbon number of A+R is 5 to 17
shall be. ) 5 to 100 parts by weight of a plasticizer, 5 to 100 parts by weight of a phosphoric acid ester, and an electrolyte.
a first sheet made of a resin composition containing 0.01 to 5 parts by weight; and a first sheet made of a resin composition made of rubber or plastic containing at least one of carbon black, carbon fiber, metal powder, and metal fiber. The second sheet is laminated with a second sheet having higher conductivity than the second sheet. In the present invention, monomers having an ionic group and a reactive double bond in the molecule to be copolymerized with vinyl chloride include (3-sulfopropyl)-acrylic acid ester potassium salt, (3-sulfopropyl)-acrylic acid ester potassium salt;
-methacrylic acid ester potassium salt, bis(3
-sulfopropyl)-itaconic acid ester potassium salt, N-(3-sulfopropyl)-N-methacroyloxyethyl-N,N-dimethyl-ammonium-betaine, N-(3-sulfopropyl)-N
-Methacroylamidopropyl-N,N-dimethyl-ammonium-betaine, 1-(3-sulfopropyl)-2-vinyl-pyridinium-betaine, and the like. In a copolymer of vinyl chloride and a monomer having an ionic group and a reactive double bond in the molecule (hereinafter referred to as "vinyl chloride copolymer"), the content of the latter monomer is in the range of 5 to 50% by weight. If it is less than 5% by weight, it tends to be difficult to obtain good electrical resistance, and if it exceeds 50% by weight, the compatibility with the phosphate ester tends to deteriorate and the mechanical strength tends to decrease. It is in. The method for obtaining such a vinyl chloride copolymer is not particularly limited, and may be either a suspension polymerization method or an emulsion polymerization method. In the present invention, the general formula
【化】
で表される可塑剤は、炭素数3〜15の直鎖又は分
岐脂肪族アルコールに炭素数2〜4のアルキレノ
キシドを1〜7モル付加して得られるアルコール
と、アルキレンオキシドの合計炭素数が5〜17で
ある末端ヒドロキシル化合物と脂肪族もしくは脂
環式二塩基酸との反応による一般的なエステル製
造法により容易に得ることができる。
アルコールの炭素数、アルキレンイキシドの付
加モル数及びアルコールとアルキレンオキシドの
合計炭素数は、本発明で規定した範囲を外れる
と、可塑剤としての効果あるいは電気抵抗の点で
不十分となる。
上記一般式で示される可塑剤の例としては、プ
ロパノールにエチレンオキシド1〜7モル又はプ
ロピレンオキシド1〜4モル又はブチレンオキシ
ド1〜3モル、ブタノールにエチレンオキシド1
〜6モル又はプロピレンオキシド1〜4モル又は
ブチレンオキシド1〜3モル、ヘキサノールにエ
チレンオキシド1〜5モル又はプロピレンオキシ
ド1〜3モル又はブチレンオキシド1〜2モル、
ヘプタノールにエチレンオキシド1ナミ5モル又
はプロピレンオキシド1〜3モル又はブチレンオ
キシド1〜2モル、オクタノールにエチレンオキ
シド1〜4モル又はプロピレンオキシド1〜3モ
ル又はブチレンオキシド1〜2モル、ノナノール
にエチレンオキシド1〜4モル又はプロピレンオ
キシド1〜2モル又はブチレンオキシド1〜2モ
ル、デカノールにエチレンオキシド1〜3モル又
はプロピレンオキシド1〜2モル又はブチレンオ
キシド1モル、ドデカノールにエチレンオキシド
1〜2モル又はプロピレンオキシド1モル又はブ
チレンオキシド1モル、テトラデカノールにエチ
レンオキシド1モル又はプロピレンオキシド1モ
ル、ペンタデカノールにエチレンオキシド1モル
を付加させた化合物等があげられる。
塩化ビニル共重合体に対する上記一般式で表さ
れる可塑剤の添加量は、目的とする体積抵抗が得
られれば特に制限しないが、塩化ビニル共重合体
100重量部に対して5〜100重量部の範囲が好まし
い。5重量部未満では目的とする体積抵抗率が得
られにくくなり、100重量部を超えると相溶性の
悪化、機械的特性の低下につながり、熱可塑性樹
脂の分野とされる用途にはそぐわなくなる可能性
がある。
リン酸エステルはその性状等については特に制
限するものではないが、常温において液状で揮発
性の少ないものが望ましい。
例えば、リン酸クレジルジフエニルエステル、
リン酸ジ(2,3−ジブロモプロピル)2,3−
ジクロロプロピルエステル、リン酸ジ(2−エチ
ルヘキシル)エステル、リン酸ジオクチルエステ
ル、リン酸トリアミルエステル、リン酸トリブト
キシエチルエステル、リン酸トリ(2−クロロエ
チル)エステル、リン酸トリ(クロロプロピル)
エステル、リン酸トリクレジルエステル、リン酸
トリ(2,3−ジブロモプロピル)エステル、リ
ン酸トリ(ジクロロプロピル)エステル等があげ
られる。リン酸エステルの添加量は、塩化ビニル
共重合体100重量部に対して5〜100重量部の範囲
が好ましい。5重量部未満では目的とする体積抵
抗率が得られにくくなり、100重量部程度で体積
抵抗率はほぼ飽和状態となり、これ以上多くして
も電気抵抗は殆ど変化せず、かえつて相溶性の悪
化、機械的特性の低下につながり、熱可塑性樹脂
の分野とされる用途にはそぐわなくなる可能性が
ある。
電解質としては、塩化リチウム、硫酸リチウ
ム、塩化ナトリウム、塩化カリウム、塩化マグネ
シウム、塩化カルシウム、塩化亜鉛、塩化バリウ
ム、硫酸ナトリウム、硫酸カリウム、クエン酸リ
チウム、臭酸リチウム等がある。ただし、硝酸塩
あるいは6価クロム酸塩等の酸化あるいは還元性
の不安定な電解質は本発明には不適当である。
電解質の添加量は、塩化ビニル共重合体100重
量部に対して0.01〜5重量部が適当であり、0.01
重量部以下では電気抵抗を下げる効果は殆どな
く、5重量部で電気抵抗の低下はほぼ飽和する。
本発明においては、上記成分以外に当然のこと
ながらDOP等の可塑剤、その他の配合剤、例え
ば安定剤、酸化防止剤、架橋剤、加硫剤、加硫助
剤、滑剤、加工助剤、難燃剤、充填剤、着色剤、
紫外線吸収剤等を適宜使用可能であり、実用的に
問題のない組成物にすることができる。
本発明の導電性床シートは上記導電性組成物か
らなるシートと従来から公知の導電性シート、す
なわちゴムまたはプラスチツクにカーボンブラツ
ク、カーボン繊維、金属粉、金属繊維等を含有さ
せて導電性に付与したシートと積層することによ
り、一層帯電防止性能を向上でき、しかも美観の
向上に役立つものである。
[実施例]
第1表の各例に示すような配合割合に従い、電
熱2本ロールを用いて混練したコンパウンドを高
圧蒸気プレスで成形し、厚さ1mmのシートを作製
した。
このシートについて、体積抵抗率を測定した結
果を第1表に下欄に示す。
なお、体積抵抗率は日本ゴム協会標準規
SRIS2304およびその解説に基き測定した。A plasticizer represented by It can be easily obtained by a general ester production method by reacting a terminal hydroxyl compound having a number of 5 to 17 with an aliphatic or alicyclic dibasic acid. If the number of carbon atoms in the alcohol, the number of moles added to the alkylene oxide, and the total number of carbon atoms in the alcohol and alkylene oxide are out of the range specified in the present invention, the effect as a plasticizer or the electrical resistance will be insufficient. Examples of plasticizers represented by the above general formula include 1 to 7 moles of ethylene oxide in propanol, 1 to 4 moles of propylene oxide, or 1 to 3 moles of butylene oxide, and 1 to 3 moles of ethylene oxide in butanol.
~6 moles or 1 to 4 moles of propylene oxide or 1 to 3 moles of butylene oxide, 1 to 5 moles of ethylene oxide or 1 to 3 moles of propylene oxide or 1 to 2 moles of butylene oxide in hexanol,
1 to 5 moles of ethylene oxide to heptanol or 1 to 3 moles of propylene oxide or 1 to 2 moles of butylene oxide, 1 to 4 moles of ethylene oxide or 1 to 3 moles of propylene oxide or 1 to 2 moles of butylene oxide to octanol, 1 to 4 moles of ethylene oxide to nonanol mole or 1 to 2 moles of propylene oxide or 1 to 2 moles of butylene oxide, 1 to 3 moles of ethylene oxide in decanol or 1 to 2 moles of propylene oxide or 1 mole of butylene oxide, 1 to 2 moles of ethylene oxide or 1 mole of propylene oxide in dodecanol or butylene Examples include compounds in which 1 mole of ethylene oxide or 1 mole of propylene oxide is added to tetradecanol, 1 mole of ethylene oxide to pentadecanol, and the like. The amount of the plasticizer represented by the above general formula to be added to the vinyl chloride copolymer is not particularly limited as long as the desired volume resistance can be obtained.
The range of 5 to 100 parts by weight per 100 parts by weight is preferred. If it is less than 5 parts by weight, it will be difficult to obtain the desired volume resistivity, and if it exceeds 100 parts by weight, it will lead to deterioration of compatibility and mechanical properties, making it unsuitable for use in the field of thermoplastic resins. There is sex. The properties of the phosphoric acid ester are not particularly limited, but it is desirable that the phosphoric acid ester is liquid at room temperature and has low volatility. For example, cresyl diphenyl phosphate,
Di(2,3-dibromopropyl) 2,3- phosphate
Dichloropropyl ester, di(2-ethylhexyl) phosphate, dioctyl phosphate, triamyl phosphate, tributoxyethyl phosphate, tri(2-chloroethyl) phosphate, tri(chloropropyl) phosphate
Examples include ester, tricresyl phosphate, tri(2,3-dibromopropyl) phosphate, tri(dichloropropyl) phosphate, and the like. The amount of phosphoric acid ester added is preferably in the range of 5 to 100 parts by weight based on 100 parts by weight of the vinyl chloride copolymer. If it is less than 5 parts by weight, it will be difficult to obtain the desired volume resistivity, and if it is about 100 parts by weight, the volume resistivity will be almost saturated. This may lead to deterioration of the mechanical properties and make them unsuitable for use in the field of thermoplastic resins. Examples of the electrolyte include lithium chloride, lithium sulfate, sodium chloride, potassium chloride, magnesium chloride, calcium chloride, zinc chloride, barium chloride, sodium sulfate, potassium sulfate, lithium citrate, and lithium bromide. However, unstable oxidizing or reducing electrolytes such as nitrates or hexavalent chromates are unsuitable for the present invention. The appropriate amount of electrolyte to be added is 0.01 to 5 parts by weight per 100 parts by weight of the vinyl chloride copolymer;
Below parts by weight, there is almost no effect of lowering the electrical resistance, and at 5 parts by weight, the reduction in electrical resistance is almost saturated. In the present invention, in addition to the above ingredients, of course, plasticizers such as DOP, other compounding agents, such as stabilizers, antioxidants, crosslinking agents, vulcanizing agents, vulcanization aids, lubricants, processing aids, flame retardants, fillers, colorants,
Ultraviolet absorbers and the like can be used as appropriate, and the composition can be made without any practical problems. The conductive floor sheet of the present invention is a sheet made of the above conductive composition and a conventionally known conductive sheet, that is, rubber or plastic containing carbon black, carbon fiber, metal powder, metal fiber, etc. to impart conductivity. By laminating it with a sheet made of aluminum, the antistatic performance can be further improved, and it is also useful for improving the aesthetic appearance. [Example] According to the compounding ratios shown in each example in Table 1, a compound was kneaded using two electrically heated rolls and molded using a high-pressure steam press to produce a sheet with a thickness of 1 mm. The results of measuring the volume resistivity of this sheet are shown in the lower column of Table 1. The volume resistivity is based on the Japan Rubber Association standard.
Measured based on SRIS2304 and its explanation.
【表】【table】
【表】
第1表より、本発明の範囲にある実施例1〜4
ではいずれも静電帯電を防止する上において十分
な電気抵抗を有する。
比較例1および2は、ポリ塩化ビニルおよび本
発明の範囲外の可塑剤を使用し、市販の帯電防止
剤を添加したものであり、電気抵抗が大きく、静
電帯電防止効果を期待できない。
実施例 5
第1図に示すように、カラー導電層1と導電層
2を積層したシートを作製した。
カラー導電層1は、実施例1の組成に加えて緑
色の着色剤であるフタロシアニングリーンを1重
量部配合した組成物を電熱2本ロールで混練し、
蒸気プレスを用いて0.5mmの厚さに成形して作製
した。
導電層2はポリ塩化ビニル樹脂100重量部に、
フタル酸ジオクチルを70重量部、カーボンブラツ
クを80重量部、その他安定剤等を5重量部配合し
た組成物をカラー導電層1の場合と同様にして
2.5mmの厚さに成形して作製した。
この導電層2の体積抵抗率は3×102Ω−cmで
あつた。
次に、カラー導電層1と導電層2とを蒸気プレ
スで積層し、表面が着色された第1図に示すよう
な積層シートを作製した。
比較例 3
カラー導電層1を、ポリ塩化ビニル樹脂100重
量部に、フタル酸ジオクチル50重量部、非イオン
系帯電防止剤(第1工業製薬(株)製、レジスタツト
141)2重量部、その他安定剤等を6重量部配合
した組成物により作製した以外は実施例5と同様
にして積層シートを作製した。
実施例5および比較例3で作製した積層シート
の電気抵抗を測定した結果は第2表に示す通りで
ある。
なお、電気抵抗の測定は第2図に示すようにし
て行つた。すなわち、導電層2と接続している銅
板4に直流電源5でもつて電圧を印加し、60mmφ
の電極3に流れる電流を電流計7で測定し、オー
ムの法則から電気抵抗を計算した。6は電圧計で
ある。[Table] From Table 1, Examples 1 to 4 falling within the scope of the present invention
Both have sufficient electrical resistance to prevent electrostatic charging. Comparative Examples 1 and 2 used polyvinyl chloride and a plasticizer outside the range of the present invention, and added a commercially available antistatic agent, so the electrical resistance was large and no antistatic effect could be expected. Example 5 As shown in FIG. 1, a sheet was prepared in which a color conductive layer 1 and a conductive layer 2 were laminated. Color conductive layer 1 was prepared by kneading a composition containing 1 part by weight of phthalocyanine green, a green colorant, in addition to the composition of Example 1 using two electrically heated rolls.
It was produced by molding it to a thickness of 0.5 mm using a steam press. The conductive layer 2 is made of 100 parts by weight of polyvinyl chloride resin.
A composition containing 70 parts by weight of dioctyl phthalate, 80 parts by weight of carbon black, and 5 parts by weight of other stabilizers was prepared in the same manner as in the case of color conductive layer 1.
It was manufactured by molding to a thickness of 2.5 mm. The volume resistivity of this conductive layer 2 was 3×10 2 Ω-cm. Next, the colored conductive layer 1 and the conductive layer 2 were laminated using a steam press to produce a laminated sheet with a colored surface as shown in FIG. 1. Comparative Example 3 Color conductive layer 1 was prepared by adding 100 parts by weight of polyvinyl chloride resin, 50 parts by weight of dioctyl phthalate, and a nonionic antistatic agent (manufactured by Daiichi Kogyo Seiyaku Co., Ltd., Resistant).
141) A laminate sheet was produced in the same manner as in Example 5, except that the composition was prepared by blending 2 parts by weight of the stabilizer and 6 parts by weight of other stabilizers and the like. The results of measuring the electrical resistance of the laminated sheets produced in Example 5 and Comparative Example 3 are shown in Table 2. The electrical resistance was measured as shown in FIG. That is, a voltage is applied to the copper plate 4 connected to the conductive layer 2 using the DC power supply 5, and the diameter of 60mmφ is
The current flowing through the electrode 3 was measured with an ammeter 7, and the electrical resistance was calculated from Ohm's law. 6 is a voltmeter.
【表】
比較例3の積層シートは電気抵抗が高く、積層
の効果が発揮されていない。
[発明の効果]
以上説明してきた通り、本発明によれば自由な
色彩に着色でき、しかも優れた帯電防止性能を有
する導電性床シートを表現できる。[Table] The laminated sheet of Comparative Example 3 had high electrical resistance, and the lamination effect was not exhibited. [Effects of the Invention] As explained above, according to the present invention, a conductive floor sheet that can be colored in any color and has excellent antistatic performance can be produced.
第1図は本発明における導電性床シートの一実
施例の説明図、第2図は導電性床シートの電気抵
抗の測定方法の説明図である。
1:導電性着色シート、2:導電性シート。
FIG. 1 is an explanatory diagram of one embodiment of the conductive floor sheet of the present invention, and FIG. 2 is an explanatory diagram of a method for measuring the electrical resistance of the conductive floor sheet. 1: Conductive colored sheet, 2: Conductive sheet.
Claims (1)
性二重結合を有するモノマとの共重合体100重量
部に対し一般式 【化】 (式中、Xは炭素数2〜8の脂肪族もしくは脂環
式の二塩基酸残基を、Rは同一又は異なつてもよ
い炭素数3〜15の直鎖又は分岐のアルキル基を、
Aは炭素数2〜4のアルキレン基をそれぞれ表
し、m、nは同一又は異なつてもよい1〜7の整
数である。ただし、A+Rの合計炭素数は5〜17
とする。) で表される可塑剤を5〜100重量部、リン酸エス
テルを5〜100重量部および電解質を0.01〜5重
量部含有せしめた樹脂組成物からなる第一のシー
トと、ゴムまたはプラスチツクにカーボンブラツ
ク、カーボン繊維、金属粉および金属繊維のうち
少なくとも一種を含有せしめた樹脂組成物からな
る上記第一のシートよりも導電性が大きな第二の
シートを積層してなることを特徴とする導電性床
シート。[Claims] 1 Based on 100 parts by weight of a copolymer of vinyl chloride and a monomer having an ionic group and a reactive double bond in the molecule, 8 aliphatic or alicyclic dibasic acid residue, R is a straight chain or branched alkyl group having 3 to 15 carbon atoms, which may be the same or different,
A represents an alkylene group having 2 to 4 carbon atoms, and m and n are integers of 1 to 7 which may be the same or different. However, the total carbon number of A+R is 5 to 17
shall be. ) A first sheet consisting of a resin composition containing 5 to 100 parts by weight of a plasticizer represented by 5 to 100 parts by weight of a phosphoric acid ester, and 0.01 to 5 parts by weight of an electrolyte; A conductive material comprising a second sheet made of a resin composition containing at least one of black, carbon fiber, metal powder, and metal fiber and having a higher conductivity than the first sheet. floor sheet.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2705586A JPS62185739A (en) | 1986-02-10 | 1986-02-10 | Electroconductive resin composition and electroconductive floor sheet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2705586A JPS62185739A (en) | 1986-02-10 | 1986-02-10 | Electroconductive resin composition and electroconductive floor sheet |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS62185739A JPS62185739A (en) | 1987-08-14 |
JPH0572500B2 true JPH0572500B2 (en) | 1993-10-12 |
Family
ID=12210384
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2705586A Granted JPS62185739A (en) | 1986-02-10 | 1986-02-10 | Electroconductive resin composition and electroconductive floor sheet |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS62185739A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2732283B2 (en) * | 1989-03-07 | 1998-03-25 | 旭電化工業株式会社 | Chlorine-containing resin composition |
JPH0847349A (en) * | 1994-08-04 | 1996-02-20 | Nichifu Co Ltd | Hot cushion for animal |
-
1986
- 1986-02-10 JP JP2705586A patent/JPS62185739A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS62185739A (en) | 1987-08-14 |
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