JPH0132861B2 - - Google Patents
Info
- Publication number
- JPH0132861B2 JPH0132861B2 JP56093196A JP9319681A JPH0132861B2 JP H0132861 B2 JPH0132861 B2 JP H0132861B2 JP 56093196 A JP56093196 A JP 56093196A JP 9319681 A JP9319681 A JP 9319681A JP H0132861 B2 JPH0132861 B2 JP H0132861B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- paint
- emulsion
- resin
- pigment
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 38
- 239000000839 emulsion Substances 0.000 claims description 27
- 229920005989 resin Polymers 0.000 claims description 25
- 239000011347 resin Substances 0.000 claims description 25
- 239000003973 paint Substances 0.000 claims description 24
- 239000000049 pigment Substances 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 239000004094 surface-active agent Substances 0.000 claims description 8
- 229910001566 austenite Inorganic materials 0.000 claims description 4
- -1 or both Substances 0.000 claims description 4
- 239000003960 organic solvent Substances 0.000 claims description 3
- 239000002904 solvent Substances 0.000 description 21
- 238000000576 coating method Methods 0.000 description 14
- 239000011248 coating agent Substances 0.000 description 12
- 238000001723 curing Methods 0.000 description 9
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 239000000693 micelle Substances 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 235000019441 ethanol Nutrition 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000008199 coating composition Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229920000877 Melamine resin Polymers 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 239000000020 Nitrocellulose Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- 229920001220 nitrocellulos Polymers 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- IANQTJSKSUMEQM-UHFFFAOYSA-N 1-benzofuran Chemical compound C1=CC=C2OC=CC2=C1 IANQTJSKSUMEQM-UHFFFAOYSA-N 0.000 description 1
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 1
- 239000001856 Ethyl cellulose Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 101000863770 Homo sapiens DNA ligase 1 Proteins 0.000 description 1
- 101000619640 Homo sapiens Leucine-rich repeats and immunoglobulin-like domains protein 1 Proteins 0.000 description 1
- 102100022170 Leucine-rich repeats and immunoglobulin-like domains protein 1 Human genes 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- QHIWVLPBUQWDMQ-UHFFFAOYSA-N butyl prop-2-enoate;methyl 2-methylprop-2-enoate;prop-2-enoic acid Chemical compound OC(=O)C=C.COC(=O)C(C)=C.CCCCOC(=O)C=C QHIWVLPBUQWDMQ-UHFFFAOYSA-N 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 235000010980 cellulose Nutrition 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 235000019325 ethyl cellulose Nutrition 0.000 description 1
- 229920001249 ethyl cellulose Polymers 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 150000002240 furans Chemical class 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 231100001231 less toxic Toxicity 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
Description
本発明は、水性エマルジヨン磁性塗料の製造法
に関するものである。
近年、有機溶剤の人体有害性、可燃物危険性お
よび省資源等の観点から水性エマルジヨン塗料が
注目されている。この水性塗料の製造法としては
一般には顔料を水溶性界面活性剤（又は樹脂）を
用いて水中に分散しておきこれに適当なエマルジ
ヨンを添加混合して製造するのが普通である。界
面活性剤（又は樹脂）を用いるのは、顔料表面を
改質して純水中に顔料が分散し易くするためと、
一定の粘度を与えていつたん分散した顔料再凝集
しないようにするためである。ところでこのよう
な塗料を塗膜化した場合塗膜の耐水性は乏しく高
湿度のもとでは塗膜の物性は劣化し耐久性や接着
性がそこなわれる問題点があつた。特に磁性顔料
を分散した磁気塗膜にこれを応用した場合磁気ヘ
ツドとの走行摩擦が行なわれるため特にこの点が
懸念される課題であつた。
この問題点を解決するため別に硬化剤を添加し
てエポキシ−アミン硬化、エポキシ−メラミン硬
化、アクリル−メラミン硬化等の化学反応を利用
して塗膜内に残留している水溶性分を硬化し不溶
化して耐水性を向上する方法がとられている。し
かるにこのような方法は、塗膜耐水性の向上する
利点のある反面、硬化反応のため長時間一定の温
度中にさらさなければならず作業性が悪いことや
塗膜を付与すべき基体に耐熱性が要求される等の
問題点があり、一方硬化反応を促進するため低
温、短時間で行なう目的で添加硬化剤を増量した
り、増感剤を加えたりすることは塗料のポツトラ
イフを短かくすることになりやはり作業性の困難
をもたらす問題点があつた。
本発明の目的は、このような問題点に鑑み作業
性の優れたかつ耐水性の良い塗膜を形成しうるよ
うな水性エマルジヨン磁性塗料の製造法を提供す
ることにある。
本発明によれば、このような目的は、水不溶性
樹脂または水不溶性界面活性剤またはこれらの両
者と、水と相溶する有機溶剤との溶解液中に磁性
顔料を混練分散し、その過程で水およびエマルジ
ヨンを加えて水性エマルジヨン磁性塗料とするこ
とによつて達成される。
このような本発明の製造法では、水および溶剤
以外には水溶性の材料を全つたく使用しないた
め、これを塗膜化した後にも（特に硬化法による
樹脂間の連結を行なわなくとも）耐湿性、耐水性
の著しく向上した塗膜を形成することができる。
すなわち、本発明の製造法の一実施例によれ
ば、まづアルコールやセロソルブ類のような水と
相溶性がある溶媒とその溶媒には可溶でありかつ
水単体には不溶である、例えばエポキシ樹脂、ニ
トロセルロース等の水不溶性樹脂を適当な濃度に
溶解しておきこれと所定の磁性顔料とを混練撹拌
し、この後分散機を通していつたん塗料化してお
く。次にこのミルベースに水を徐々に加えてゆく
と溶媒中の水分はしだいに増して（水は貧溶媒と
して使用するため）ついには樹脂の溶解度を越え
それまで充分溶解し拡がつていた樹脂分子は退縮
してミセル化し溶媒中に析出を初める。ミセル化
は樹脂自身で進むと共に樹脂が顔料となじみやす
い場合には顔料表面に吸着析出して顔料同志の再
凝集をさまたげる。このようにして得られた塗料
は水が主分散媒となつておりその中に顔料、ミセ
ル化した樹脂が析出分散している状態であり一種
のエマルジヨン塗料ということができる。しかる
後別の所望する特性を有するエマルジヨン液を添
加すれば簡単な撹拌で希望する水性エマルジヨン
塗料を製造することができる。このようにして製
作された水性エマルジヨン塗料の水可溶性分は水
相溶性溶剤と水そのものでありこれは乾燥塗膜化
の過程で蒸発し残留するのは水不溶性分ばかりな
ので（特に硬化等の反応なしでも）必然的に耐水
性は著るしく向上することが見込める。
尚この塗料化において使用するアルコールやセ
ロソルブ類のような水相溶性溶剤はなるべく少な
く使用することが望ましい。というのは後から添
加するエマルジヨンに作用して凝集等の不安定性
を助長しかねないからであり、したがつて初めに
溶剤塗料を製作する時点で樹脂の溶解をそこなわ
ない程度に水で希釈しておいてもよく、また分散
機を通す際に塗料の流動性が要求されるような場
合その前工程である混練撹拌工程後に水を添加し
てあらかじめ樹脂を析出化せしめかつ流動性を増
したのち分散するのも一法である。
いづれにしてもこのようにして製作された塗料
は耐水性の良い塗膜を提供するだけでなく、アル
コールやセロソルブのような比較的有毒性の少な
い溶剤を使用することから安全性に富み、また省
資源の点からも極めて有用である。また従来の水
溶性界面活性剤を用いた塗料製造法では重大なる
欠点であつた塗料の発泡現象ももともとその原因
である界面活性剤を使用していないことから防止
できこの点でも効果を期待できる。
次に添付図面に基づいて、前述したような本発
明の製造法についてより詳細に説明する。
第１図は本発明による水性エマルジヨン磁性塗
料製造法の工程概念図であつて、第１図Ａはアル
コールやセロソルブ類のような水と相溶する溶媒
１中に磁性顔料２が分散し、前記溶媒には可溶で
あつて水には不溶である樹脂（又は界面活性剤）
３が溶解している状態を示している。第１図Ｂ
は、これに水４を添加している様子を示しこの操
作によつて溶解していた樹脂は析出しミセル３′
となる。参照番号１′は溶媒を示し、２′は表面に
樹脂ミセルを吸着した顔料を示している。第１図
Ｃはこれにエマルジヨン５を混合する状態を示し
ており、参照番号６はエマルジヨン粒子、１″は
溶媒、２″顔料、３″は樹脂ミセルをあらわしてい
る。顔料を分散する工程は、第１図Ａから第１図
Ｂに到る工程が、第１図Ｂから第１図Ｃに到る工
程のどちらであつても良い。
第２図は、このようにして得られた塗料を基体
７上に塗布して溶媒を乾燥蒸発している状態をあ
らわしておりそれぞれ参照番号８は溶媒（乾燥蒸
発状態は矢印Ｖで示している）、９は顔料、１０
は樹脂ミセル、１１はエマルジヨン粒子を示して
いる。ここで溶媒８は蒸発除去される。
第３図は乾燥後成膜化した状態をあらわしてお
り、参照番号１２は成膜したエマルジヨン粒子お
よび樹脂を示し、９′は顔料、７′は基体を示して
いる。
次に、本発明の製造法のより具体的な実施例に
ついて説明する。
実施例 １
次に示す組成物を三本ロールミルにより練摩す
る。
γ−Fe2O3 100重量部
スミエポキシELA134（住友化学株式会社）25％
エチルセルソルブ溶液 18重量部
エチルセロソルブ 40重量部
上に示した組成物に水120重量部を加えてスミエ
ポキシ樹脂を析出させた後サンドグライドミルで
分散する。次に分散した組成物に水系エマルジヨ
ンであるアミン変性アクリルエマルジヨンのヨド
ゾール2D131B（カネボウ−NSC社）を90重量部
を加え塗料組成物とする。この塗料をノズル式コ
ーテイング機でポリエチレンテレフタレート基体
に塗布し70℃で乾燥させる。
実施例 ２
次に示す組成物を三本ロールミルにより練摩す
る。
TiO2 100重量部
硝化綿LIG1/2（旭化成株式会社）５％ブタノー
ル溶液 30重量部
ブチルアルコール 15重量部
上に示した組成物にブタノール30重量部を加え
サンドグラインドミルで分散する。次に分散した
組成物に水130部を加えて溶解している硝化綿を
析出させた後水系エマルジヨンであるウレタンエ
マルジヨンのアイゼラツクスS4040N（保土谷化学
社）を90重量部を加え塗料組成物とする。この塗
料をスプレーガンにより軟鋼板に塗布し60℃で60
分乾操する。
実施例１、２により作製した試験片の浸水試験
結果を示す。
The present invention relates to a method for producing an aqueous emulsion magnetic coating. In recent years, water-based emulsion paints have been attracting attention from the viewpoints of the toxicity of organic solvents to the human body, the danger of flammable substances, and resource conservation. The general method for manufacturing this water-based paint is to disperse the pigment in water using a water-soluble surfactant (or resin), and then add and mix the pigment with a suitable emulsion. The reason why a surfactant (or resin) is used is to modify the pigment surface and make it easier to disperse the pigment in pure water.
This is to provide a certain viscosity to prevent the once-dispersed pigment from re-agglomerating. However, when such a paint is formed into a film, there is a problem that the water resistance of the film is poor, and the physical properties of the film deteriorate under high humidity, resulting in loss of durability and adhesion. In particular, when this is applied to a magnetic coating film in which magnetic pigments are dispersed, running friction with the magnetic head occurs, so this point has been a particular concern. To solve this problem, we added a curing agent separately and used chemical reactions such as epoxy-amine curing, epoxy-melamine curing, and acrylic-melamine curing to harden the water-soluble components remaining in the paint film. A method is being used to improve water resistance by making it insolubilizable. However, while this method has the advantage of improving the water resistance of the coating film, it has to be exposed to a constant temperature for a long period of time for the curing reaction, resulting in poor workability and poor heat resistance for the substrate to be coated. On the other hand, increasing the amount of an additive curing agent or adding a sensitizer to accelerate the curing reaction at low temperatures and in a short time shortens the pot life of the paint. As a result, there were problems that caused difficulties in workability. SUMMARY OF THE INVENTION In view of these problems, it is an object of the present invention to provide a method for producing a water-based emulsion magnetic paint that is easy to work with and can form a coating film with good water resistance. According to the present invention, such an object is achieved by kneading and dispersing a magnetic pigment in a solution of a water-insoluble resin, a water-insoluble surfactant, or both, and an organic solvent that is compatible with water, and in the process. This is accomplished by adding water and emulsion to form an aqueous emulsion magnetic coating. The manufacturing method of the present invention does not use any water-soluble materials other than water and solvents, so even after it is formed into a coating (especially without connecting the resins by a curing method) A coating film with significantly improved moisture resistance and water resistance can be formed. That is, according to an embodiment of the production method of the present invention, first, a solvent that is compatible with water, such as alcohol or cellosolve, and a solvent that is soluble in that solvent and insoluble in water alone, e.g. A water-insoluble resin such as an epoxy resin or nitrocellulose is dissolved to an appropriate concentration, and a prescribed magnetic pigment is kneaded and stirred, and then passed through a dispersion machine to form a paint. Next, when water is gradually added to this mill base, the water in the solvent gradually increases (because water is used as a poor solvent), and eventually exceeds the solubility of the resin, which had previously been sufficiently dissolved and spread. The molecules regress, form micelles, and begin to precipitate into the solvent. Micelle formation progresses by the resin itself, and if the resin is easily compatible with the pigment, it adsorbs and precipitates on the pigment surface, preventing re-agglomeration of the pigments. The paint thus obtained has water as its main dispersion medium, in which the pigment and micellar resin are precipitated and dispersed, and can be called a type of emulsion paint. Thereafter, by adding another emulsion liquid having desired properties, a desired aqueous emulsion paint can be produced by simple stirring. The water-soluble components of the water-based emulsion paint produced in this way are a water-compatible solvent and water itself, which evaporate during the drying process and only the water-insoluble components remain (particularly during reactions such as curing). (even without) it is expected that the water resistance will be significantly improved. It is desirable to use as little water-compatible solvents as alcohol and cellosolves as possible in this coating process. This is because it may act on the emulsion added later and promote instability such as agglomeration.Therefore, when making the solvent paint for the first time, it is necessary to dilute it with water to the extent that it does not damage the dissolution of the resin. Alternatively, if fluidity of the paint is required when passing through a dispersion machine, water may be added after the kneading and stirring step, which is the previous step, to precipitate the resin and increase fluidity. One method is to disperse it afterwards. In any case, the paint produced in this way not only provides a coating film with good water resistance, but is also highly safe because it uses relatively less toxic solvents such as alcohol and cellosolve. It is also extremely useful from the point of view of resource saving. In addition, the foaming phenomenon of paint, which was a serious drawback in conventional paint manufacturing methods using water-soluble surfactants, can be prevented because no surfactant is used, which is the original cause of this phenomenon, and an effect can be expected in this respect as well. . Next, the manufacturing method of the present invention as described above will be explained in more detail based on the accompanying drawings. FIG. 1 is a conceptual diagram of the process for producing an aqueous emulsion magnetic paint according to the present invention, and FIG. Resin (or surfactant) that is soluble in solvent but insoluble in water
3 is dissolved. Figure 1B
shows that water 4 is added to this, and as a result of this operation, the dissolved resin precipitates and forms micelles 3'
becomes. Reference number 1' indicates a solvent, and 2' indicates a pigment with resin micelles adsorbed on its surface. FIG. 1C shows a state in which emulsion 5 is mixed therein, with reference number 6 representing emulsion particles, 1″ representing solvent, 2″ representing pigment, and 3″ representing resin micelles.The step of dispersing the pigment is , the process from Figure 1A to Figure 1B may be any of the processes from Figure 1B to Figure 1C. Figure 2 shows the paint obtained in this way. is applied onto the substrate 7 and the solvent is dried and evaporated, and the reference number 8 is the solvent (the dry evaporation state is indicated by the arrow V), 9 is the pigment, and 10 is the solvent.
11 indicates resin micelles, and 11 indicates emulsion particles. Here, the solvent 8 is removed by evaporation. FIG. 3 shows the film formed after drying, where reference number 12 indicates the emulsion particles and resin formed into the film, 9' indicates the pigment, and 7' indicates the substrate. Next, more specific examples of the manufacturing method of the present invention will be described. Example 1 The following composition was milled using a three-roll mill. γ-Fe 2 O 3 100 parts by weight Sumiepoxy ELA134 (Sumitomo Chemical Co., Ltd.) 25%
Ethyl cellosolve solution: 18 parts by weight Ethyl cellosolve: 40 parts by weight 120 parts by weight of water is added to the above composition to precipitate Sumie epoxy resin, which is then dispersed in a sand glide mill. Next, 90 parts by weight of amine-modified acrylic emulsion Yodozol 2D131B (Kanebo-NSC), which is an aqueous emulsion, is added to the dispersed composition to prepare a coating composition. This paint is applied to a polyethylene terephthalate substrate using a nozzle coating machine and dried at 70°C. Example 2 The following composition was milled using a three-roll mill. TiO 2 100 parts by weight Nitrified cotton LIG1/2 (Asahi Kasei Corporation) 5% butanol solution 30 parts by weight Butyl alcohol 15 parts by weight Add 30 parts by weight of butanol to the above composition and disperse with a sand grind mill. Next, 130 parts of water was added to the dispersed composition to precipitate the dissolved nitrified cotton, and then 90 parts by weight of urethane emulsion Izelax S4040N (Hodogaya Chemical Co., Ltd.), which is an aqueous emulsion, was added to form a coating composition. do. Apply this paint to a mild steel plate with a spray gun and heat it to 60°C.
Manipulate separately. The results of the water immersion test of the test pieces produced in Examples 1 and 2 are shown.
【表】
また、実施例１、２により作製した試験片の80
℃、98％における耐温湿度試験結果を示す。[Table] Also, 80% of the test pieces prepared in Examples 1 and 2
Shows the temperature and humidity resistance test results at ℃ and 98%.
【表】
次に実施例１により作製した磁気テープの磁気
特性を示す。[Table] Next, the magnetic properties of the magnetic tape produced in Example 1 are shown.
【表】
これらと比較するためにγ−Fe2O3100重量部
に水溶性界面活性剤であるポリカルボン酸塩を５
重量部と水を40重量部加えて分散しアクリルエマ
ルジヨンを90重量部加えて磁性塗料組成物とす
る。この組成物をポリエチレンテレフタレート基
体に塗布し、120℃で乾燥し磁気テープとして浸
水試験を行なつた結果24時間で塗膜膨潤が生じ、
耐温湿度試験では12時間で塗膜膨潤が生じた。
これらの結果より本発明によつて製造した塗料
組成物による塗膜は従来の水系エマルジヨン塗料
よりもきわめて優れた耐水性を示す。
以上実施例を説明したが、本発明に使用できる
磁性顔料としては、γ−Fe2O3、Fe3O4等であり、
水相溶性の溶剤としてはメタノール、エチルアル
コールブタノール等のアルコール類、セロソル
ブ、ブチルセロソルブ等のセロソルブ類、グリコ
ール類、フラン類の他これらの混合溶剤、水との
混合溶剤、若干のケトン類、炭化水素類との混合
溶剤が使用できまた上記溶剤に可溶で水不溶性樹
脂としてはニトロセルロース、エチルセルロース
等のセルロース類、ブチラール樹脂、フエノール
樹脂の他フタル酸樹脂、酢酸ビニル樹脂、スチレ
ン樹脂、塩化ビニル樹脂塩化ビニリデン樹脂、尿
素樹脂、アルキド樹脂、エポキシ樹脂、ウレタン
樹脂、クマロン樹脂、アクリル樹脂、ポリエステ
ル樹脂、ポリアミド樹脂、メラミン樹脂等の他こ
れらのコポリマーについて効果を期待できる。[Table] For comparison, 5 parts by weight of polycarboxylate, a water-soluble surfactant, was added to 100 parts by weight of γ-Fe 2 O 3 .
Part by weight and 40 parts by weight of water are added and dispersed, and 90 parts by weight of acrylic emulsion is added to prepare a magnetic coating composition. This composition was applied to a polyethylene terephthalate substrate, dried at 120°C, and subjected to a water immersion test as a magnetic tape. As a result, the coating film swelled in 24 hours.
In the temperature and humidity resistance test, the coating film swelled after 12 hours. These results show that the coating film made from the coating composition produced according to the present invention exhibits extremely superior water resistance than conventional water-based emulsion coatings. Although the examples have been described above, magnetic pigments that can be used in the present invention include γ-Fe 2 O 3 , Fe 3 O 4 , etc.
Water-compatible solvents include alcohols such as methanol and ethyl alcohol butanol, cellosolves such as cellosolve and butyl cellosolve, glycols, furans, and mixed solvents of these, mixed solvents with water, some ketones, and hydrocarbons. In addition, water-insoluble resins soluble in the above solvents include celluloses such as nitrocellulose and ethylcellulose, butyral resins, phenolic resins, phthalic acid resins, vinyl acetate resins, styrene resins, and vinyl chloride resins. Effects can be expected from vinylidene chloride resins, urea resins, alkyd resins, epoxy resins, urethane resins, coumaron resins, acrylic resins, polyester resins, polyamide resins, melamine resins, and copolymers of these.
添付図面の第１図は本発明による水性エマルジ
ヨン磁性塗料製造法の工程概念図、第２図は本発
明の製造法によつて得られた塗料を基体に塗布し
乾燥蒸発状態にあるところを示す概念図、第３図
は第２図の状態から乾燥後成膜化した状態を示す
図である。
１……溶媒、２……顔料、３……水不溶性樹
脂、４……水、５……エマルジヨン。
Figure 1 of the accompanying drawings is a conceptual diagram of the process for manufacturing the aqueous emulsion magnetic paint according to the present invention, and Figure 2 shows the paint obtained by the manufacturing method of the present invention being applied to a substrate and being dried and evaporated. The conceptual diagram, FIG. 3, is a diagram showing a state in which a film is formed after drying from the state in FIG. 2. 1... Solvent, 2... Pigment, 3... Water-insoluble resin, 4... Water, 5... Emulsion.
Claims (1)
はこれらの両者と、水と相溶する有機溶剤との溶
解液中に磁性顔料を混練分散し、その過程で水お
よびエマルジヨンを加えることを特徴とする水性
エマルジヨン磁性塗料製造法。 ２ 前記磁性顔料は、γ−Fe2O3、またはFe3O4
である特許請求の範囲第１項記載の水性エマルジ
ヨン磁性塗料製造法。[Claims] 1. A magnetic pigment is kneaded and dispersed in a solution of a water-insoluble resin, a water-insoluble surfactant, or both, and an organic solvent that is compatible with water, and water and an emulsion are added during the process. A method for producing an aqueous emulsion magnetic paint characterized by the following. 2 The magnetic pigment is γ-Fe 2 O 3 or Fe 3 O 4
A method for producing an aqueous emulsion magnetic paint according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9319681A JPS57207655A (en) | 1981-06-17 | 1981-06-17 | Preparation of water-based emulsion paint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9319681A JPS57207655A (en) | 1981-06-17 | 1981-06-17 | Preparation of water-based emulsion paint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57207655A JPS57207655A (en) | 1982-12-20 |
| JPH0132861B2 true JPH0132861B2 (en) | 1989-07-10 |
Family
ID=14075819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9319681A Granted JPS57207655A (en) | 1981-06-17 | 1981-06-17 | Preparation of water-based emulsion paint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57207655A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62167368A (en) * | 1986-01-17 | 1987-07-23 | Sumitomo Metal Mining Co Ltd | Paste for forming magnetic coating film |
| JPH0726041B2 (en) * | 1987-01-27 | 1995-03-22 | 東洋製罐株式会社 | Manufacturing method of emulsion type water-based paint |
| JPH0645769B2 (en) * | 1987-01-27 | 1994-06-15 | 東洋製罐株式会社 | Method for producing emulsified water-based paint |
| AUPM981994A0 (en) * | 1994-12-02 | 1995-01-05 | Vanadale Pty Limited | Magnetic coating composition |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52107034A (en) * | 1976-03-05 | 1977-09-08 | Kansai Paint Co Ltd | Method of manufacturing water-base thermosetting coating composition |
| JPS52110731A (en) * | 1976-03-15 | 1977-09-17 | Dainippon Toryo Co Ltd | Method of manufacturing water dispersed coating composition |
| JPS5485230A (en) * | 1977-12-20 | 1979-07-06 | Nippon Oil & Fats Co Ltd | Preparation of coating resin dispersion |
-
1981
- 1981-06-17 JP JP9319681A patent/JPS57207655A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52107034A (en) * | 1976-03-05 | 1977-09-08 | Kansai Paint Co Ltd | Method of manufacturing water-base thermosetting coating composition |
| JPS52110731A (en) * | 1976-03-15 | 1977-09-17 | Dainippon Toryo Co Ltd | Method of manufacturing water dispersed coating composition |
| JPS5485230A (en) * | 1977-12-20 | 1979-07-06 | Nippon Oil & Fats Co Ltd | Preparation of coating resin dispersion |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57207655A (en) | 1982-12-20 |
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