JPS6341566A - Magnetic polymer and production thereof - Google Patents
Magnetic polymer and production thereofInfo
- Publication number
- JPS6341566A JPS6341566A JP61185695A JP18569586A JPS6341566A JP S6341566 A JPS6341566 A JP S6341566A JP 61185695 A JP61185695 A JP 61185695A JP 18569586 A JP18569586 A JP 18569586A JP S6341566 A JPS6341566 A JP S6341566A
- Authority
- JP
- Japan
- Prior art keywords
- polymer
- magnetic
- aqueous solution
- pva
- fine particles
- 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.)
- Granted
Links
- 229920000642 polymer Polymers 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 13
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000010419 fine particle Substances 0.000 claims abstract description 7
- 230000002194 synthesizing effect Effects 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 abstract description 17
- 239000000243 solution Substances 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 150000008044 alkali metal hydroxides Chemical class 0.000 abstract description 3
- 229910021578 Iron(III) chloride Inorganic materials 0.000 abstract description 2
- 229960002089 ferrous chloride Drugs 0.000 abstract description 2
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 abstract description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 abstract description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 abstract 1
- 229910001447 ferric ion Inorganic materials 0.000 abstract 1
- 229910001448 ferrous ion Inorganic materials 0.000 abstract 1
- 239000007858 starting material Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 229910052742 iron Inorganic materials 0.000 description 9
- -1 iron ions Chemical class 0.000 description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 3
- 230000005389 magnetism Effects 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 229920001817 Agar Polymers 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 2
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 238000005481 NMR spectroscopy Methods 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- 108010020346 Polyglutamic Acid Proteins 0.000 description 2
- 241000596504 Tamarindus Species 0.000 description 2
- 235000004298 Tamarindus indica Nutrition 0.000 description 2
- 239000008272 agar Substances 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000000502 dialysis Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 229920000370 gamma-poly(glutamate) polymer Polymers 0.000 description 2
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 239000000230 xanthan gum Substances 0.000 description 2
- 229920001285 xanthan gum Polymers 0.000 description 2
- 235000010493 xanthan gum Nutrition 0.000 description 2
- 229940082509 xanthan gum Drugs 0.000 description 2
- 229920000298 Cellophane Polymers 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Paints Or Removers (AREA)
- Soft Magnetic Materials (AREA)
- Credit Cards Or The Like (AREA)
- Wrappers (AREA)
- Compounds Of Iron (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、事務用品、包装材料などに応用可能な透明な
磁性ポリマーおよびその製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a transparent magnetic polymer that can be applied to office supplies, packaging materials, etc., and a method for producing the same.
（従来の技術）
成形可能な磁性を有するポリマーとしては従来、ポリマ
ー中にフェライトなどの磁性物質を分散させたものや寒
天をマトリックスとしてマグネタイトを合成したものが
知られている。(Prior Art) Conventionally known moldable magnetic polymers include those in which a magnetic substance such as ferrite is dispersed in a polymer, and those in which magnetite is synthesized using agar as a matrix.
（発明が解決しようとする問題点）
しかしながら、前記のポリマー中に磁性物質を分散させ
たものにおいては、磁性物質がポリマー中で偏在する傾
向があり、磁性物質の含有量が多い部位は非常に脆くな
り、しかも透明性が低下するという問題点があった。一
方、寒天をマトリックスとしてマグネタイトを合成した
ものは、透明性は良好であるが機械的強度は極めて弱く
、成形加工性に乏しいという問題点があった。(Problems to be Solved by the Invention) However, in the above-mentioned polymer in which a magnetic substance is dispersed, the magnetic substance tends to be unevenly distributed in the polymer, and the areas with a high content of magnetic substance are very concentrated. There were problems in that it became brittle and its transparency decreased. On the other hand, materials in which magnetite is synthesized using agar as a matrix have good transparency, but have extremely low mechanical strength and poor moldability.
（問題点を解決するための手段）
本発明者等は、前記の問題点を解決して、磁性を備え、
かつ光透過性の良好な成形加工性ポリマーを得るべく鋭
意検討した結果、本発明に到達したものである。(Means for Solving the Problems) The present inventors have solved the above problems and have provided magnetism,
The present invention was arrived at as a result of intensive studies aimed at obtaining a moldable polymer with good light transmittance.
すなわち、本発明は前記問題点を解決するため、マグネ
タイトをポリマー水溶液中で合成することにより得られ
るポリマー中に平均粒子径が可視光線の波長以下である
マグネタイト微粒子を含有させた磁性ポリマーおよびそ
の製造方法を提供するものである。That is, in order to solve the above-mentioned problems, the present invention provides a magnetic polymer obtained by synthesizing magnetite in an aqueous polymer solution and containing fine magnetite particles having an average particle size equal to or less than the wavelength of visible light in a polymer obtained by synthesizing magnetite in an aqueous polymer solution, and the production thereof. The present invention provides a method.
本発明で用いるポリマーとしては、実質的に完全けん化
したポリビニルアルコール（以下、ＰＶＡと略称する）
をはじめとして、ヒドロキシエチルセルロース、カルボ
キシメチルセルロース等のセルロース誘導体、ポリアク
リル酸ソーダ、ポリグルタミン酸ソーダ、ポリエチレン
オキサイド、ポリエチレングリコール、キサンタンガム
、タマリンドガム等の水溶性ポリマーが好適に使用され
るが、これらの中でも後の工程での成形性が優れている
点でＰＶＡが特に好ましい。The polymer used in the present invention is substantially completely saponified polyvinyl alcohol (hereinafter abbreviated as PVA).
In addition, cellulose derivatives such as hydroxyethyl cellulose and carboxymethyl cellulose, water-soluble polymers such as sodium polyacrylate, sodium polyglutamate, polyethylene oxide, polyethylene glycol, xanthan gum, and tamarind gum are preferably used. PVA is particularly preferred since it has excellent moldability in the step of.
以下、ポリマーとしてＰＶＡを用いた場合を例にあげて
本発明の磁性ポリマーの製造方法について説明する。Ｐ
ＶＡ水溶液中に２価の鉄イオンと３価の鉄イオンとを共
存させて、十分混合しながらアルカリ金属の水酸化物を
添加することにより、ＰＶＡ中にマグネタイト微粒子を
生成させた後、乾燥することにより、磁性ポリマーが得
られる。Hereinafter, the method for producing the magnetic polymer of the present invention will be explained using an example in which PVA is used as the polymer. P
By making divalent iron ions and trivalent iron ions coexist in VA aqueous solution and adding alkali metal hydroxide while thoroughly mixing, magnetite fine particles are generated in PVA, and then dried. By this, a magnetic polymer is obtained.
本発明で用いるＰＶＡ水溶液の濃度は特に限定されない
が、０．１〜１０重量％の範囲が取扱い易いので好まし
い。Although the concentration of the PVA aqueous solution used in the present invention is not particularly limited, it is preferably in the range of 0.1 to 10% by weight since it is easy to handle.
本発明でポリマーに添加する２価の鉄イオンおよび３価
の鉄イオンは、ＰＶＡ１重量部に対してそれぞれ０．０
０５〜０．２５重量部および０．０１〜０．５重量部で
あることが好ましい。これらの鉄イオンの添加量が、こ
の下限値より少ないと得られる磁性ポリマーの磁性が弱
くなり、一方この上限値よりも多いと得られる磁性ポリ
マーの透明性が低下して所期の目的を達成することがで
きない。また、３価の鉄イオンの添加量は、得られるマ
グネタイトの組成の点から２価の鉄イオンの２倍程度で
あることが好ましい。The divalent iron ion and trivalent iron ion added to the polymer in the present invention are each 0.0% per 1 part by weight of PVA.
05 to 0.25 parts by weight and 0.01 to 0.5 parts by weight are preferred. If the amount of iron ions added is less than this lower limit, the resulting magnetic polymer will have weaker magnetism, while if it is more than this upper limit, the transparency of the resulting magnetic polymer will decrease, making it impossible to achieve the desired purpose. Can not do it. Further, the amount of trivalent iron ions added is preferably about twice that of divalent iron ions from the viewpoint of the composition of the obtained magnetite.
本発明で前記鉄イオンを含有するＰＶＡ水溶液に滴下す
るアルカリ金属水酸化物の量は、反応系のｐ Ｈが１２
．０以上になるように加減する。このことにより、ＰＶ
Ａ水？容液中にマグネタイトの（数粒子が生成する。反
応終了後、目視できる程度の粗大粒子は濾紙などにより
濾別して、マグネタイト微粒子の直径が２０００Å以下
、好ましくは１０００Å以下になるようにして、純水を
用いた透析法により不純物イオン類を除去して目的とす
る磁性ポリマーの水溶液が得られる。このとき水溶液中
に直径２０００Å以上の粒子が多く含まれると、得られ
るポリマーの透明性が低下するので好ましくない。この
ようにして得られた水溶液を塊状で、あるいは流延など
の方法によってシート状その他の形状に成形して乾燥し
、磁性ポリマーとする。この磁性ポリマーは磁性を備え
るとともに透明性が良好なため、たとえばシート状に成
形して事務用品、包装材料などとして利用することがで
きる。In the present invention, the amount of alkali metal hydroxide added dropwise to the PVA aqueous solution containing iron ions is determined so that the pH of the reaction system is 12.
．． Adjust so that it becomes 0 or more. By this, PV
A water? A few particles of magnetite are generated in the solution. After the reaction is complete, visually visible coarse particles are filtered out using a filter paper, etc., so that the diameter of the fine magnetite particles is 2000 Å or less, preferably 1000 Å or less, and pure water is added. An aqueous solution of the desired magnetic polymer can be obtained by removing impurity ions using a dialysis method.At this time, if the aqueous solution contains many particles with a diameter of 2000 Å or more, the transparency of the obtained polymer will decrease. Not preferable.The aqueous solution thus obtained is formed into a block or into a sheet or other shape by a method such as casting and dried to obtain a magnetic polymer.This magnetic polymer has both magnetism and transparency. Because of its good properties, it can be formed into a sheet shape and used as office supplies, packaging materials, etc.
（実施例）
以下、実施例に基づいて本発明を具体的に説明するが、
本発明はこれらの実施例に限定されるものではない。(Examples) Hereinafter, the present invention will be specifically explained based on Examples.
The present invention is not limited to these examples.
実施例 １
強力な攪拌機を備えた容量５００ｍｆｆの丸底フラスコ
に完全けん化ｐＶＡ （平均重合度： ２，０００ ）
の５重量％濃度の水溶液１００ｇを入れ、これに濃度１
５重量％の塩化第１鉄水溶液３ｇと温度２０重量％の塩
化第２鉄水溶液６ｇを加えた後、さらに水１５０ｇを追
加して均一な水溶液になるまで攪拌した。Example 1 Completely saponified pVA (average degree of polymerization: 2,000) was placed in a 500 mff round bottom flask equipped with a strong stirrer.
Add 100g of a 5% concentration aqueous solution of
After adding 3 g of a 5 wt % ferrous chloride aqueous solution and 6 g of a 20 wt % ferric chloride aqueous solution, 150 g of water was further added and stirred until a uniform aqueous solution was obtained.
さらに強く攪拌しながら、濃度３規定の苛性ソーダ水溶
液を滴下してｐ Ｈを１２．０に調整した後、反応系を
９０℃にて３０分間加熱した。With further strong stirring, a 3N aqueous solution of caustic soda was added dropwise to adjust the pH to 12.0, and then the reaction system was heated at 90°C for 30 minutes.
反応終了後、ガラスフィルターを用いて沈澱物ヲ濾別し
、セロハンチューブを用い蒸留水の交換を繰り返し行っ
て３〜５日間透析を続けて、未反応の鉄イオンや塩素イ
オン、苛性ソーダなどを完全に除去した。このようにし
て得られた溶液をキャスティングによって成膜し、乾燥
したところ、厚さ６０１Ｉｍの褐色の透明なフィルムが
得られた。After the reaction is complete, the precipitate is filtered out using a glass filter, and the distilled water is repeatedly exchanged using a cellophane tube and dialysis is continued for 3 to 5 days to completely remove unreacted iron ions, chloride ions, caustic soda, etc. It was removed. When the solution thus obtained was formed into a film by casting and dried, a brown transparent film with a thickness of 601 Im was obtained.
このフィルムの光透過率は９０％であった。また、磁化
率はエバンス法により核磁気共鳴（ＮＭＲ）の手法を用
いて測定したところ、磁性ポリマーとしての重量磁化率
は２〜５ｅｍμ／ｇであった。The light transmittance of this film was 90%. Moreover, when the magnetic susceptibility was measured using a nuclear magnetic resonance (NMR) technique according to the Evans method, the weight magnetic susceptibility as a magnetic polymer was 2 to 5 emμ/g.
得られたフィルムを蒸留水５Ｑｍｎ、濃硫酸１１ｍ４、
ポウ硝２０ｇ、３７％ポルマリン１９ｍ７！およびアセ
トン５０ｍ１からなるアセタール化浴に投入し、約１０
分後、３０分かけて６０°Ｃまで昇温して、６０℃で約
２時間反応させた後、取出して水洗しホルマール化フィ
ルムを得た。The obtained film was mixed with 5Qmn of distilled water, 11m4 of concentrated sulfuric acid,
20g of porcelain salt, 37% Polmarine 19m7! and 50 ml of acetone, and
After a few minutes, the temperature was raised to 60°C over 30 minutes, and the mixture was reacted at 60°C for about 2 hours, and then taken out and washed with water to obtain a formalized film.
このフィルムは、水中に入れても溶解することなく、優
れた耐水性を示した。This film did not dissolve even when placed in water and exhibited excellent water resistance.
実施例 ２〜９
実施例１において、実施例２〜９に対応して、ＰＶＡ０
代わりにそれぞれ、ヒドロキシエチルセルロース、カル
ボキシメチルセルロース、ポリアクリル酸ソーダ、ポリ
グルタミン酸ソーダ、ポリエチレンオキサイド、ポリエ
チレングリコール、キサンタンガムおよびタマリンドガ
ムを用いた他は、実施例１と同様にしてマグネタイト含
有磁性ボυマー水溶液を得た。このポリマー水溶液を水
平面上に流延し、乾燥して厚さ約２００μｍのシートを
得た。これらのシートは、いずれも磁性を備え、かつ良
好な透明性を有するものであった。Examples 2 to 9 In Example 1, PVA0 corresponds to Examples 2 to 9.
A magnetite-containing magnetic bomber aqueous solution was prepared in the same manner as in Example 1, except that hydroxyethyl cellulose, carboxymethyl cellulose, sodium polyacrylate, sodium polyglutamate, polyethylene oxide, polyethylene glycol, xanthan gum, and tamarind gum were used instead. Obtained. This aqueous polymer solution was cast on a horizontal surface and dried to obtain a sheet with a thickness of about 200 μm. All of these sheets were magnetic and had good transparency.
（作用および効果）
本発明によれば、ポリマーの溶液状雰囲気の中で、磁性
体の溶液状原料を均一に混合、分散させた後、反応させ
て磁性体を合成することにより、生成する磁性体は極め
て微細な粒子となってポリマー中に含有されるため、磁
性を備えるとともに良好な透明性を有する磁性ポリマー
を得ることができる。(Functions and Effects) According to the present invention, the magnetic material is produced by uniformly mixing and dispersing the solution raw materials of the magnetic material in a polymer solution atmosphere, and then reacting them to synthesize the magnetic material. Since the particles are contained in the polymer in the form of extremely fine particles, it is possible to obtain a magnetic polymer that is both magnetic and has good transparency.
Claims (5)
を特徴とする磁性ポリマーの製造方法。(1) A method for producing a magnetic polymer, which comprises synthesizing magnetite in an aqueous polymer solution.
ことを特徴とする特許請求の範囲第１項記載の磁性ポリ
マーの製造方法。(2) The method for producing a magnetic polymer according to claim 1, wherein the polymer is made of polyvinyl alcohol.
あるマグネタイト微粒子を含有させたことを特徴とする
磁性ポリマー。(3) A magnetic polymer characterized in that the polymer contains magnetite fine particles whose average particle diameter is equal to or less than the wavelength of visible light.
Å以下であることを特徴とする特許請求の範囲第３項記
載の磁性ポリマー。(4) The average particle diameter of the magnetite fine particles is 1000.
4. The magnetic polymer according to claim 3, wherein the magnetic polymer has a particle diameter of Å or less.
徴とする特許請求の範囲第３項記載の磁性ポリマー。(5) The magnetic polymer according to claim 3, wherein the magnetic polymer is imparted with water resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61185695A JPH0745594B2 (en) | 1986-08-06 | 1986-08-06 | Method for producing magnetic polymer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61185695A JPH0745594B2 (en) | 1986-08-06 | 1986-08-06 | Method for producing magnetic polymer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6341566A true JPS6341566A (en) | 1988-02-22 |
| JPH0745594B2 JPH0745594B2 (en) | 1995-05-17 |
Family
ID=16175247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61185695A Expired - Fee Related JPH0745594B2 (en) | 1986-08-06 | 1986-08-06 | Method for producing magnetic polymer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0745594B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63108057A (en) * | 1986-10-23 | 1988-05-12 | Mihama Hisaharu | Magnetic chemical modifier |
| JP2019530796A (en) * | 2016-07-15 | 2019-10-24 | サウジ アラビアン オイル カンパニーＳａｕｄｉ Ａｒａｂｉａｎ Ｏｉｌ Ｃｏｍｐａｎｙ | Corrosion-resistant coating and method for producing the same |
| CN115112786A (en) * | 2022-05-31 | 2022-09-27 | 永春县产品质量检验所(福建省香产品质量检验中心、国家燃香类产品质量监督检验中心(福建)) | Method for detecting content of polycyclic aromatic hydrocarbon substances in incense products |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5252978A (en) * | 1976-07-14 | 1977-04-28 | Nippon Vinyl Kogyo Kk | Process for manufacturing interior wall coverings for building |
| JPS5268247A (en) * | 1975-12-02 | 1977-06-06 | Rikagaku Kenkyusho | Ferromagnetic synthetic resins |
| JPS58167660A (en) * | 1982-03-29 | 1983-10-03 | Hitachi Metals Ltd | Lead for writing |
-
1986
- 1986-08-06 JP JP61185695A patent/JPH0745594B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5268247A (en) * | 1975-12-02 | 1977-06-06 | Rikagaku Kenkyusho | Ferromagnetic synthetic resins |
| JPS5252978A (en) * | 1976-07-14 | 1977-04-28 | Nippon Vinyl Kogyo Kk | Process for manufacturing interior wall coverings for building |
| JPS58167660A (en) * | 1982-03-29 | 1983-10-03 | Hitachi Metals Ltd | Lead for writing |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63108057A (en) * | 1986-10-23 | 1988-05-12 | Mihama Hisaharu | Magnetic chemical modifier |
| JP2019530796A (en) * | 2016-07-15 | 2019-10-24 | サウジ アラビアン オイル カンパニーＳａｕｄｉ Ａｒａｂｉａｎ Ｏｉｌ Ｃｏｍｐａｎｙ | Corrosion-resistant coating and method for producing the same |
| CN115112786A (en) * | 2022-05-31 | 2022-09-27 | 永春县产品质量检验所(福建省香产品质量检验中心、国家燃香类产品质量监督检验中心(福建)) | Method for detecting content of polycyclic aromatic hydrocarbon substances in incense products |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0745594B2 (en) | 1995-05-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |