JPH07103335B2 - Oil-based pigment ink for writing instruments - Google Patents
Oil-based pigment ink for writing instrumentsInfo
- Publication number
- JPH07103335B2 JPH07103335B2 JP62078397A JP7839787A JPH07103335B2 JP H07103335 B2 JPH07103335 B2 JP H07103335B2 JP 62078397 A JP62078397 A JP 62078397A JP 7839787 A JP7839787 A JP 7839787A JP H07103335 B2 JPH07103335 B2 JP H07103335B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- ink
- based pigment
- pigment ink
- carbon black
- 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
Landscapes
- Inks, Pencil-Leads, Or Crayons (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は，筆記具用油性顔料インキに関し，更に詳しく
は，毛細管現象を利用した吐出機構を有する筆記具に適
した流動性を有し，かつ，分散安定性に優れ，フェルト
製ペン先，繊維ペン先，又は，プラスチックペン先等で
目詰りしにくい筆記具用油性顔料インキに関するもので
ある。Description: TECHNICAL FIELD The present invention relates to an oil-based pigment ink for a writing instrument, and more specifically, it has fluidity suitable for a writing instrument having an ejection mechanism utilizing the capillary phenomenon, and The present invention relates to an oil-based pigment ink for a writing instrument, which has excellent dispersion stability and is less likely to be clogged with a felt nib, a fiber nib, or a plastic nib.
（従来の技術） 従来より筆記具用油性インキ，即ち油性タイプのインキ
は，紙，布等の吸収面やプラスチック，ガラス，金属等
の非吸収面のどちらにも筆記可能であり，しかも速乾性
であることから広く使用せられているが，着色材として
顔料を用いたインキは，筆跡堅牢性が特に優れているた
め，一般にペイントマーカーとして用いられ，ペイント
マーカー用黒色インキの顔料としてはカーボンブラック
が用いられている。(Prior Art) Conventionally, oil-based inks for writing instruments, that is, oil-based inks, can be written on both the absorbing surface of paper, cloth, etc. and the non-absorbing surface of plastic, glass, metal, etc. Although it is widely used, the ink that uses a pigment as a coloring material is generally used as a paint marker because of its particularly excellent handwriting fastness. Carbon black is used as a pigment for a black ink for a paint marker. It is used.
（発明が解決しようとする問題点） しかしながら，前記カーボンブラックを着色材として用
いた油性顔料インキはその粘度が高いために，毛細管現
象を利用した吐出機構を有する筆記具においては十分な
吐出量が得られず筆記カスレが発生するため，前記ペイ
ントマーカーは弁構造を採用して，吐出量をカバーして
いる。また，上記インキは，長期的に，カーボンブラッ
クの沈降現象が発生し，流動性が悪くなり，ペン先の目
詰りが発生する。そのため従来のペイントマーカーはイ
ンキ収納部中にインキと共に金属球等の撹拌部材を入れ
て，再分散する方法をとっており，前記弁構造とからみ
合わせて複雑な構造を有しているために部品点数の増
大，作業工程の複雑化をまねきコストアップとなってし
まうという問題点があった。(Problems to be Solved by the Invention) However, since the oil-based pigment ink using the carbon black as a coloring material has a high viscosity, a sufficient ejection amount can be obtained in a writing instrument having an ejection mechanism utilizing the capillary phenomenon. Since the writing mark is not generated, the paint marker adopts a valve structure to cover the discharge amount. Further, in the above ink, the sedimentation phenomenon of carbon black occurs for a long time, the fluidity deteriorates, and the pen tip is clogged. Therefore, the conventional paint marker has a method in which a stirring member such as a metal ball is put together with ink in the ink storage portion and redistributed, and since it has a complicated structure intertwined with the valve structure, it is a component. There was a problem that the number of points increased and the work process became complicated, resulting in an increase in cost.
そこで，本発明は，従来のペイントマーカーのような構
造を採用しなくても良い筆記具用油性顔料インキ，即
ち，良好な流動性を有し，分散性に優れ，かつ，長期保
存においてもペン先で目詰りしにくい筆記具用油性顔料
インキを得ることを目的としたものである。Therefore, the present invention is an oil-based pigment ink for writing instruments that does not need to adopt the structure of a conventional paint marker, that is, has good fluidity, excellent dispersibility, and can be used for a long period of time even when stored in a pen tip. The purpose of the present invention is to obtain an oil-based pigment ink for writing instruments that does not easily clog.
（問題点を解決するための手段） 本発明者等は，上記目的に鑑み鋭意研究を重ねた結果，
遂に本発明を完成したものである。即ち、本発明は、BE
T法による比表面積が21〜85［m2/g］のカーボンブラッ
クと、重合度が1000以下のポリビニルブチラールと、ア
ルコール系溶剤及び／又はグリコールエーテル系溶剤と
から少なくともなる筆記具用油性顔料インキを要旨とす
るものである。(Means for Solving Problems) The inventors of the present invention have conducted extensive studies in view of the above-mentioned object, and as a result,
Finally, the present invention has been completed. That is, the present invention is a BE
An oil-based pigment ink for a writing instrument comprising at least a carbon black having a specific surface area by the T method of 21 to 85 [m 2 / g], a polyvinyl butyral having a polymerization degree of 1000 or less, and an alcohol solvent and / or a glycol ether solvent. It is a summary.
以下，本発明の筆記具用油性顔料インキの各成分につい
て説明する。Hereinafter, each component of the oil-based pigment ink for writing instruments of the present invention will be described.
着色材であるカーボンブラックは，十分な濃度を有しつ
つ，前記筆記具に適した流動性を有し，分散性に優れ，
かつペン先目詰りしにくいインキとなすうえで,BET法に
よる非表面積が21〜85［m2/g］である必要があり，具体
的には,Special Black250、同100、Printex300、同3
0、同３、同35、同25、同200、同Ｇ（以上、デグッサ
（株）製）、RAVEN890、同850、同825BEADS、同500、同
450、同430BEADS、同420、同410、同22POWDER、同16POW
DER、同14POWDER、（以上、コロビヤンカーボン日本
（株）製）などを単独あるいは、混合して使用すること
ができ、その使用量は，インキ全量に対して３〜20重量
％が好ましい。比表面積が21より小さいと，黒色度が低
く，かつ，分散が不十分となり,110より大きいと，粘度
が高くなり，前記筆記具に適した流動性が得られなくな
り，又，長期保存においてペン先目詰りが発生する。Carbon black, which is a coloring material, has a sufficient concentration, has fluidity suitable for the writing instrument, and has excellent dispersibility,
In addition, the non-surface area by the BET method must be 21 to 85 [m 2 / g] in order to form an ink that does not easily clog the nib. Specifically, Special Black250, 100, Printex300, 3
0, the same 3, the same 35, the same 25, the same 200, the same G (above, manufactured by Degussa Co., Ltd.), RAVEN890, the same 850, the same 825BEADS, the same 500, the same
450, 430 BEADS, 420, 410, 22POWDER, 16POW
DER, 14POWDER, and the like (manufactured by Korobiyan Carbon Japan Co., Ltd.) can be used alone or in combination, and the amount used is preferably 3 to 20% by weight with respect to the total amount of the ink. When the specific surface area is less than 21, the blackness is low and the dispersion is insufficient, and when it is more than 110, the viscosity is high, and the fluidity suitable for the writing instrument cannot be obtained, and the pen tip is not suitable for long-term storage. Clogging occurs.
ここで,BET法による比表面積とは，試料であるカーボン
ブラックに所定圧で液体窒素を吸着させ，この吸着量を
ブルナウアー＝エメット＝テーラー式に従って計算する
ことにより得られる値であって，カーボンブラックの比
表面積を表わす最も一般的な方法により得られる値であ
る。Here, the specific surface area according to the BET method is a value obtained by causing liquid nitrogen to be adsorbed to carbon black as a sample at a predetermined pressure and calculating the adsorption amount according to the Brunauer-Emmett-Taylor equation. Is a value obtained by the most general method of expressing the specific surface area of.
ポリビニルブチラール樹脂（以下,PVBと略記する）は，
カーボンブラックの分散剤，沈降防止剤及びバインダー
として用いるものであって，筆跡の堅牢度及びインキの
保存安定性のためには，インキ中の添加量が多い方が好
ましく，カーボンブラックの分散剤，沈降防止剤として
は重合度が高い方が好ましい。しかしながら，添加量が
多い場合，又，重合度が高い場合インキ粘度が高くな
る。一方，毛細管現象を利用した吐出機構を有する筆記
具に適したインキ粘度は20cps（at25℃）以下，より好
ましくは15cps（at25℃）以下であるので，平均重合度
が1000以下のものが好ましく用いられ，具体的にはデン
カブチラール＃2000−L,＃3000−1,＃3000−2,＃3000−
4,＃4000−1,＃4000−2,（以上，電気化学工業（株）
製）エスレックBL−1,BL−2,BL−S,BX−L,BM−1,BM−2,
BM−Ｓ（以上積水化学工業（株）製）などがあり，使用
量は，平均重合度等により異なるものの，カーボンブラ
ックに対して，重量比（PVB/カーボンブラック）で0.1
〜2.0の範囲が望ましい。Polyvinyl butyral resin (hereinafter abbreviated as PVB) is
It is used as a dispersant for carbon black, an anti-settling agent and a binder. For the fastness of handwriting and the storage stability of ink, it is preferable that the amount added in the ink is large. It is preferable that the anti-settling agent has a high degree of polymerization. However, if the addition amount is large or the degree of polymerization is high, the ink viscosity becomes high. On the other hand, since the ink viscosity suitable for a writing instrument having a discharge mechanism utilizing the capillary phenomenon is 20 cps (at 25 ° C) or less, more preferably 15 cps (at 25 ° C) or less, an average polymerization degree of 1000 or less is preferably used. 、 Specifically, Denka Butyral # 2000-L, # 3000-1, # 3000-2, # 3000-
4, # 4000-1, # 4000-2, (above, Denki Kagaku Kogyo Co., Ltd.)
Made) S-REC BL-1, BL-2, BL-S, BX-L, BM-1, BM-2,
For example, BM-S (manufactured by Sekisui Chemical Co., Ltd.), etc., the amount used varies depending on the average degree of polymerization, etc., but is 0.1% by weight ratio (PVB / carbon black) to carbon black.
A range of ~ 2.0 is desirable.
アルコール系溶剤及びグリコールエーテル系溶剤として
は，メタノール，エタノール,n−プロピルアルコール，
イソプロピルアルコール,n−ブチルアルコール,sec−ブ
チルアルコール,tert−ブチルアルコール,n−アミルア
ルコール，イソアミルアルコール,sec−アミルアルコー
ル,n−ヘキサノール及びメチルセロソルブ，エチルセロ
ソルブ，イソプロピルセロソルブ，ブチルセロソルブ，
プロピレングリコールモノメチルエーテル等がある。Examples of alcohol solvents and glycol ether solvents include methanol, ethanol, n-propyl alcohol,
Isopropyl alcohol, n-butyl alcohol, sec-butyl alcohol, tert-butyl alcohol, n-amyl alcohol, isoamyl alcohol, sec-amyl alcohol, n-hexanol and methyl cellosolve, ethyl cellosolve, isopropyl cellosolve, butyl cellosolve,
Examples include propylene glycol monomethyl ether.
また，上記以外の成分として，樹脂，界面活性剤，防錆
剤，分散助剤，潤滑剤等を必要に応じて適宜使用するこ
ともできる。In addition, as components other than the above, resins, surfactants, rust preventives, dispersion aids, lubricants, etc. can be appropriately used as necessary.
本発明に係る筆記具用油性顔料インキの製造方法として
は，従来公知の方法が採用でき，上述せる各成分を，ホ
モミキサー，ボールミル，ホモジナイザー，サンドミ
ル，ロールミル等の分散機にて混練分散することにより
容易に得ることができる。As a method for producing the oil-based pigment ink for a writing instrument according to the present invention, a conventionally known method can be adopted. Can be easily obtained.
（作用） 本発明に係る筆記具用油性顔料インキが，何故，流動性
が良く分散性に優れ，かつペン先での目詰りが発生しな
いかは定かではないが，各成分の相互作用による効果及
び,BET法による比表面積が21〜85［m2/g］のカーボンブ
ラックに対して重合度1000以下のPVBを使用した場合に
限りカーボンブラック表面へのPVBの吸着作用が特に強
く、その結果分散性、沈降防止の効果が完全に発現する
ために、流動性，及び分散安定性に優れ，かつ，長期保
存においてもカーボンブラックが沈降することがなくペ
ン先での目詰りが発生しないものと考えられる。(Operation) It is not clear why the oil-based pigment ink for a writing instrument according to the present invention has good fluidity and excellent dispersibility and does not cause clogging at the pen tip, but the effect of interaction of each component and The adsorption of PVB on the surface of carbon black is particularly strong only when PVB with a polymerization degree of 1000 or less is used for carbon black with a BET specific surface area of 21 to 85 [m 2 / g], resulting in dispersion. It is considered that the fluidity and the dispersion stability are excellent because the effect of preventing the sedimentation and sedimentation is fully exhibited, and that the carbon black does not sediment even during long-term storage and clogging at the pen tip does not occur. To be
（実施例） 以下，実施例により本発明をより詳細に説明するが，実
施例中「部」とあるのは，「重量部」を示す。(Examples) Hereinafter, the present invention will be described in more detail with reference to examples. In the examples, "part" means "part by weight".
（１） カーボンブラック（コロンビヤンカーボン日本
（株）製） （２） カーボンブラック（デグサ（株）製） （３） ロジン変性特殊合成樹脂（播磨化成工業（株）
製） （４） 油溶性アルカノールアマイド配合物（旭電化工
業（株）製） （発明の効果） 実施例１〜４及び比較例１〜３により得られたインキに
ついて試験を行なった。その結果を表２に示す。 (1) Carbon black (Colombyan Carbon Japan Co., Ltd.) (2) Carbon black (Degussa Co., Ltd.) (3) Rosin-modified special synthetic resin (Harima Chemical Industry Co., Ltd.)
(4) Oil-soluble alkanol amide compound (manufactured by Asahi Denka Co., Ltd.) (Effect of the invention) The inks obtained in Examples 1 to 4 and Comparative Examples 1 to 3 were tested. The results are shown in Table 2.
注） 比較例１はカーボンブラックの分散ができず，イ
ンキ化できなかった。 Note) In Comparative Example 1, the carbon black could not be dispersed and could not be made into an ink.
※１ 流動性：得たインキをＢ型粘度計を用い,25℃に
て粘度を測定した。* 1 Flowability: The viscosity of the obtained ink was measured at 25 ° C using a B type viscometer.
※２ 分散性試験：各インキを油性メンブランフィルタ
ー0.30μｍ（TM−3P,東洋ろ紙（株）製）に点滴し，そ
の状態を目視にて判定した。* 2 Dispersibility test: Each ink was dropped on an oil-based membrane filter 0.30 μm (TM-3P, manufactured by Toyo Roshi Kaisha, Ltd.), and the state was visually determined.
○：完全通過する △：一部通過しない ×：ほとんど通過しない ※３ ペン先目詰り試験：各インキをアクリル樹脂製繊
維を熱硬化性樹脂でかためた繊維ペン先を有するサイン
ペンに充填し,3カ月放置した後筆記を行ない，その状態
を目視にて判定した。○: Completely passed △: Partially passed ×: Almost not passed * 3 Pen tip clogging test: Each ink was filled in a felt-tip pen having a fiber nib in which acrylic resin fibers were hardened with a thermosetting resin, After leaving for 3 months, writing was performed and the state was visually judged.
○：目詰りなく良好な筆跡 ×：目詰り発生し筆跡がカスレる 以上説明したように本発明に係る筆記具用油性顔料イン
キは流動性，分散性に優れ，ペン先での目詰りが発生し
ない優れたものである。◯: Good handwriting without clogging ×: Clogging occurs and the handwriting is blurred As described above, the oil-based pigment ink for a writing instrument according to the present invention has excellent fluidity and dispersibility, and does not cause clogging at the pen tip. It is excellent.
尚，本発明の筆記具用油性顔料インキは，従来のペイン
トマーカー構造の筆記具にも勿論使用できるものであ
る。The oil-based pigment ink for a writing instrument of the present invention can of course be used for a conventional writing instrument having a paint marker structure.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭59−207975（ＪＰ，Ａ) 特開 昭57−159856（ＪＰ，Ａ) 特開 昭50−141612（ＪＰ，Ａ) 特開 昭51−16126（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 59-207975 (JP, A) JP 57-159856 (JP, A) JP 50-141612 (JP, A) JP 51- 16126 (JP, A)
Claims (1)
カーボンブラックと、重合度が1000以下のポリビニルブ
チラールと、アルコール系溶剤及び／又はグリコールエ
ーテル系溶剤とから少なくともなる筆記具用油性顔料イ
ンキ。1. A writing instrument comprising at least carbon black having a specific surface area by BET method of 21 to 85 [m 2 / g], polyvinyl butyral having a polymerization degree of 1000 or less, and an alcohol solvent and / or a glycol ether solvent. Oil-based pigment ink.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62078397A JPH07103335B2 (en) | 1987-03-31 | 1987-03-31 | Oil-based pigment ink for writing instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62078397A JPH07103335B2 (en) | 1987-03-31 | 1987-03-31 | Oil-based pigment ink for writing instruments |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63245481A JPS63245481A (en) | 1988-10-12 |
| JPH07103335B2 true JPH07103335B2 (en) | 1995-11-08 |
Family
ID=13660885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62078397A Expired - Lifetime JPH07103335B2 (en) | 1987-03-31 | 1987-03-31 | Oil-based pigment ink for writing instruments |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07103335B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0813949B2 (en) * | 1987-11-19 | 1996-02-14 | 株式会社サクラクレパス | Oil-based pigment ink composition for core type marking pen |
| JPH10204341A (en) * | 1997-01-21 | 1998-08-04 | Mitsubishi Chem Corp | Paint composition |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5213807B2 (en) * | 1974-05-02 | 1977-04-16 | ||
| JPS5116126A (en) * | 1974-07-13 | 1976-02-09 | Pilot Pen Co Ltd | INKIFUSHINTOSEIHITSUKIBANYOINKIOYOBISONO SEIZOHOHO |
| JPS592711B2 (en) * | 1981-03-28 | 1984-01-20 | 学校法人 近畿大学 | Manufacturing method of modified carbon black |
| DE3315741A1 (en) * | 1983-04-30 | 1984-10-31 | Fa. J.S. Staedtler, 8500 Nürnberg | PIGMENT-CONTAINING WRITING AND ITS PRODUCTION AND USE |
-
1987
- 1987-03-31 JP JP62078397A patent/JPH07103335B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63245481A (en) | 1988-10-12 |
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