JPH0558036B2 - - Google Patents

Info

Publication number
JPH0558036B2
JPH0558036B2 JP17632584A JP17632584A JPH0558036B2 JP H0558036 B2 JPH0558036 B2 JP H0558036B2 JP 17632584 A JP17632584 A JP 17632584A JP 17632584 A JP17632584 A JP 17632584A JP H0558036 B2 JPH0558036 B2 JP H0558036B2
Authority
JP
Japan
Prior art keywords
ink
ballpoint pen
viscosity
water
ink composition
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
Application number
JP17632584A
Other languages
Japanese (ja)
Other versions
JPS6155174A (en
Inventor
Hiroshi Myashita
Makoto Yamaguchi
Shigeru Nagai
Isao Konuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pentel Co Ltd
Original Assignee
Pentel Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pentel Co Ltd filed Critical Pentel Co Ltd
Priority to JP59176325A priority Critical patent/JPS6155174A/en
Publication of JPS6155174A publication Critical patent/JPS6155174A/en
Publication of JPH0558036B2 publication Critical patent/JPH0558036B2/ja
Granted legal-status Critical Current

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  • Inks, Pencil-Leads, Or Crayons (AREA)

Description

【発明の詳細な説明】[Detailed description of the invention]

(産業上の利用分野) 本発明はボールの回転によるボール受座の摩耗
を極力防止することにより、もつて良好なインキ
の吐出性を確保せしめたボールペン用インキ組成
物に関するものである。 (従来の技術) 従来ボールペンとしては油性のもの或いは水性
のものが知られているが、油性ボールペンの場合
その構造が極めて簡単であり、またインキ残量が
一目でわかるという長所を有している反面、数千
〜1万CPSという高粘性のインキであるが故に筆
記面におけるインキの浸透が悪くなり、そのため
ボテが発生したり筆跡が割れたりするという欠点
を有しており、また水性ボールペンの場合、油性
のそれとは逆にボテ等の発生はなく瑞々しい鮮明
な筆跡が得られる反面、インキ吸蔵部とボールペ
ン先との間にインキ中継部材を介在させたりする
など構造的に複雑になりがちであるという欠点を
有しており、両者にはそれぞれ一長一短があつ
た。 本発明者らはこの様な事情に基き、油性ボール
ペンのもつ長所と水性ボールペンのもつ長所両方
を兼ね備えた機能的にも経済的にも優れたボール
ペンを得るべく種々研究を重ねたところ、1つの
知見としてそのインキの粘度が50〜2000CPSの範
囲内に調製されていることが最適であるというこ
とを得るに至つた。 しかし乍ら、単に樹脂等により粘度を上記範囲
に設定したインキを実際にボールペンに充填して
筆記すると、ボールの回転摩擦によりボール受座
が摩耗して、所謂、ボール沈みが発生し、これに
よつてボールペンチツプ内のインキ流通溝がボー
ルによつて塞がれインキの吐出性に問題を生じ、
遂には筆記不能になつてしまうなど新たな問題を
生起せしめることになつた。従来の水性ボールペ
ンにおいては、使用するインキの粘度が数CPSと
いう低粘性であるため、仮にボール沈みが発生し
てもその毛管力によつてインキの吐出量はある程
度確保できるため左程この傾向はみられず、また
数千〜1万CPSという高粘性のインキを使用する
油性ボールペンにおいても、インキ自体がその高
粘性に起因して潤滑剤の役目を果たすことにな
り、これによつてボール沈みは抑止され、インキ
の吐出性にはあまり問題が無かつたものである。 (発明の目的) 本発明はこのような状況に鑑みなされたもの
で、粘度が50〜2000CPSのインキを使用したボー
ルペンにおけるボール受座の摩耗を防止すべく
種々の添加剤について検討を行なつた結果、分子
末端に第1級もしくは第2級のアルコール基を有
するポリエーテルポリオールが最適であることを
見い出し、遂に本発明を完成したものである。 (発明の構成) 即ち本発明は、染料と樹脂と溶剤と水とから少
なくともなる粘度50〜2000CPSのボールペン用イ
ンキ組成物であつて、該ボールペン用インキ組成
物には分子末端に第1級もしくは第2級のアルコ
ール基を有するポリエーテルポリオールが含有さ
れていることを特徴とするボールペン用インキ組
成物を要旨とするものである。 本発明において使用される分子末端に第1級も
しくは第2級のアルコール基を有するポリエーテ
ルポリオールの具体例としては、サンニツクス
PP−200、同PP−400、同GP−250、同GP−
400、同TP−200、同TP−400、同GL−3000、同
GL−2800、同GEP−2800、同FP−750(以上、三
洋化成(株)製)等が挙げられ、これらは1種もしく
は2種以上混合して使用可能であり、その使用量
はインキ組成物全重量に対して5〜30重量%が特
に好ましい。ポリエーテルポリオールの含有量が
5重量%未満では所望の潤滑性が得難くなり、ま
た30重量%を越えると筆跡が滲み易くなり実用上
不適となる。 本発明に使用される他の成分である染料、樹
脂、溶剤は従来より公知の水性インキの各成分と
何ら異なるところはない。その一例を示せば染料
として水溶性染料、樹脂としてはピロリドン系樹
脂、セルロース類、溶剤としてはエチレングリー
コルの如き水溶性有機溶剤等である。 (実施例) 以下本発明を実施例に基づき更に詳細に説明す
るが、実施例中「部」とあるのは「重量部」を示
すものとする。 実施例 1 ウオーターブラツク 187L(オリエント化学(株)
製) 8部 ポリビニルピロリドンK−90 10〃 エチレングリコール 15〃 サンニツクスPP−400(ポリエーテルポリオー
ル、三洋化成(株)製) 10〃 水 57〃 還流冷却器を備えたフラスコに上記配合物を入
れ、60〜80℃の加熱下攪拌溶解し、ろ過させて不
溶解残査を除去して、粘度250CPSの黒色のボー
ルペン用インキ組成物を得た。 実施例 2 ウオーターブルー #9 8部 ヒドロキシプロピルセルロースH(日本曹達(株)
製) 7〃 エチレングリコール 16〃 サンニツクスTP−400(ポリエーテルポリオー
ル、三洋化成(株)製) 15〃 水 54〃 実施例1と同様の方法により粘度800CPSの青
色のボールペン用インキ組成物を得た。 比較例 実施例1におけるサンニツクスPP−400を除去
し、エチレングリコールを25部とした以外は全て
実施例1と同様になしたものを比較例とした。
(粘度200CPS) (発明の効果) 以上実施例1,2、比較例で得られたボールペ
ン用インキ組成物を洋白ボールペンチツプを有す
る透明なインキ収容管に充填し、筆記荷重100g、
筆記角度70°、筆記速度7cm/secの条件下で螺旋
筆記を行ない、そのボール沈み量が3/100(mm)
になるまでの筆記距離を測定した。結果は下表の
とおりである。
(Industrial Field of Application) The present invention relates to an ink composition for a ballpoint pen that ensures good ink ejection properties by preventing as much as possible the wear of the ball seat due to the rotation of the ball. (Prior art) Oil-based or water-based ballpoint pens are known as conventional ballpoint pens, but oil-based ballpoint pens have the advantage of having an extremely simple structure and being able to see the amount of ink remaining at a glance. On the other hand, since the ink has a high viscosity of several thousand to 10,000 CPS, it has the disadvantage of poor penetration of the ink into the writing surface, resulting in smudges and cracked handwriting. In contrast to oil-based pens, they do not cause any smudges and give fresh, clear handwriting, but on the other hand, they are structurally more complex, such as interposing an ink relay member between the ink storage part and the ballpoint pen tip. Both have their own advantages and disadvantages. Based on these circumstances, the inventors of the present invention have conducted various studies in order to obtain a functionally and economically superior ballpoint pen that combines both the advantages of oil-based ballpoint pens and the advantages of water-based ballpoint pens, and have found one. We have come to the conclusion that it is optimal for the ink to have a viscosity within the range of 50 to 2000 CPS. However, if you actually fill a ballpoint pen with ink whose viscosity is set within the above range using resin or the like and then write, the ball seat will wear out due to the rotational friction of the ball, causing the ball to sink. As a result, the ink flow groove in the ballpoint pen tip is blocked by the ball, causing problems in ink ejection.
This led to new problems, such as the inability to write. In conventional water-based ballpoint pens, the ink used has a low viscosity of a few CPS, so even if the ball sinks, the capillary force can ensure a certain amount of ink ejection, so this tendency is less likely to occur. Also, even in oil-based ballpoint pens that use highly viscous ink of several thousand to 10,000 CPS, the ink itself acts as a lubricant due to its high viscosity, and this causes the ball to sink. was suppressed, and there were no problems with the ink ejectability. (Object of the Invention) The present invention was made in view of the above situation, and various additives were studied to prevent wear of the ball seat in ballpoint pens using ink with a viscosity of 50 to 2000 CPS. As a result, it was discovered that a polyether polyol having a primary or secondary alcohol group at the end of the molecule was optimal, and the present invention was finally completed. (Structure of the Invention) That is, the present invention provides an ink composition for a ballpoint pen having a viscosity of 50 to 2000 CPS and comprising at least a dye, a resin, a solvent, and water, and the ink composition for a ballpoint pen has a primary or The gist of the present invention is an ink composition for a ballpoint pen characterized by containing a polyether polyol having a secondary alcohol group. A specific example of the polyether polyol having a primary or secondary alcohol group at the molecular end used in the present invention is Sannics.
PP-200, PP-400, GP-250, GP-
400, TP-200, TP-400, GL-3000, TP-200, TP-400, GL-3000,
Examples include GL-2800, GEP-2800, and FP-750 (manufactured by Sanyo Chemical Co., Ltd.), and these can be used singly or in a mixture of two or more, and the amount used depends on the ink composition. Particularly preferred is 5 to 30% by weight based on the total weight of the product. If the polyether polyol content is less than 5% by weight, it is difficult to obtain the desired lubricity, and if it exceeds 30% by weight, handwriting tends to smear, making it unsuitable for practical use. The other components used in the present invention, such as dye, resin, and solvent, are no different from the components of conventionally known aqueous inks. For example, the dye may be a water-soluble dye, the resin may be a pyrrolidone resin or cellulose, and the solvent may be a water-soluble organic solvent such as ethylene glycol. (Example) The present invention will be described in more detail based on Examples below, where "parts" in the Examples indicate "parts by weight." Example 1 Water black 187L (Orient Chemical Co., Ltd.)
(manufactured by Sanyo Chemical Co., Ltd.) 8 parts Polyvinylpyrrolidone K-90 10〃 Ethylene glycol 15〃 Sannix PP-400 (polyether polyol, manufactured by Sanyo Chemical Co., Ltd.) 10〃 Water 57〃 Put the above mixture into a flask equipped with a reflux condenser, The mixture was stirred and dissolved under heating at 60 to 80°C, and undissolved residues were removed by filtration to obtain a black ballpoint pen ink composition with a viscosity of 250 CPS. Example 2 Water Blue #9 8 parts Hydroxypropyl Cellulose H (Nippon Soda Co., Ltd.)
7. Ethylene glycol 16. Sannix TP-400 (polyether polyol, manufactured by Sanyo Kasei Co., Ltd.) 15. Water 54. A blue ballpoint pen ink composition with a viscosity of 800 CPS was obtained in the same manner as in Example 1. . Comparative Example A comparative example was prepared in the same manner as in Example 1 except that Sannix PP-400 in Example 1 was removed and ethylene glycol was changed to 25 parts.
(Viscosity 200CPS) (Effect of the invention) The ballpoint pen ink compositions obtained in Examples 1 and 2 and Comparative Example were filled into a transparent ink storage tube with a nickel silver ballpoint tip, and the writing load was 100g.
Spiral writing was performed under the conditions of a writing angle of 70° and a writing speed of 7 cm/sec, and the amount of ball sinking was 3/100 (mm).
The writing distance was measured. The results are shown in the table below.

【表】 上表からも明らかな如く、本発明によればイン
キの粘度を50〜2000CPSに設定してこれをボール
ペンに充填し筆記を行なつてもボールの回転によ
るボール受座の摩耗が極力防止でき、ボール沈み
による筆記不能といつた問題が極力解消できるも
ので、勿論冒頭のところでも述べた従来の油性ボ
ールペン、水性ボールペンのもつそれぞれの長所
をも具備した優れたボールペン用インキ組成物と
言える。
[Table] As is clear from the table above, according to the present invention, even if the viscosity of the ink is set to 50 to 2000 CPS and the ink is filled into a ballpoint pen to write, the wear of the ball seat due to the rotation of the ball is minimized. It is an excellent ink composition for ballpoint pens that can prevent problems such as inability to write due to sinking of the ball and, of course, has the respective advantages of conventional oil-based ballpoint pens and water-based ballpoint pens as mentioned at the beginning. I can say it.

Claims (1)

【特許請求の範囲】[Claims] 1 染料と樹脂と溶剤と水とから少なくともなる
粘度50〜2000CPSのボールペン用インキ組成物で
あつて、該ボールペン用インキ組成物には分子末
端に第1級もしくは第2級のアルコール基を有す
るポリエーテルポリオールが含有されていること
を特徴とするボールペン用インキ組成物。
1. An ink composition for a ballpoint pen having a viscosity of 50 to 2000 CPS and consisting of at least a dye, a resin, a solvent, and water, the ink composition for a ballpoint pen containing a polyester having a primary or secondary alcohol group at the molecular end. An ink composition for a ballpoint pen, characterized in that it contains an ether polyol.
JP59176325A 1984-08-24 1984-08-24 Ball point ink composition Granted JPS6155174A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59176325A JPS6155174A (en) 1984-08-24 1984-08-24 Ball point ink composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59176325A JPS6155174A (en) 1984-08-24 1984-08-24 Ball point ink composition

Publications (2)

Publication Number Publication Date
JPS6155174A JPS6155174A (en) 1986-03-19
JPH0558036B2 true JPH0558036B2 (en) 1993-08-25

Family

ID=16011608

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59176325A Granted JPS6155174A (en) 1984-08-24 1984-08-24 Ball point ink composition

Country Status (1)

Country Link
JP (1) JPS6155174A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2662794B2 (en) * 1988-04-26 1997-10-15 パイロットインキ株式会社 Aqueous ink composition for ballpoint pens
JPH01299880A (en) * 1988-05-28 1989-12-04 Pentel Kk Oil-base ink for ballpoint pen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5385627A (en) * 1976-12-30 1978-07-28 Mitsubishi Pencil Co Aqueous ink composition for ball point pen
JPS5465608A (en) * 1977-11-01 1979-05-26 Mitsubishi Pencil Co Aqueous ink
JPS5733314A (en) * 1980-08-08 1982-02-23 Yokogawa Hokushin Electric Corp Displacement converter
JPS58176281A (en) * 1982-04-09 1983-10-15 Tonbo Enpitsu:Kk Emulsion ink composition for writing
JPS59140273A (en) * 1983-01-31 1984-08-11 Pilot Pen Co Ltd:The Water ink

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5385627A (en) * 1976-12-30 1978-07-28 Mitsubishi Pencil Co Aqueous ink composition for ball point pen
JPS5465608A (en) * 1977-11-01 1979-05-26 Mitsubishi Pencil Co Aqueous ink
JPS5733314A (en) * 1980-08-08 1982-02-23 Yokogawa Hokushin Electric Corp Displacement converter
JPS58176281A (en) * 1982-04-09 1983-10-15 Tonbo Enpitsu:Kk Emulsion ink composition for writing
JPS59140273A (en) * 1983-01-31 1984-08-11 Pilot Pen Co Ltd:The Water ink

Also Published As

Publication number Publication date
JPS6155174A (en) 1986-03-19

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