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JP4458511B2 - Solid drawing material - Google Patents
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JP4458511B2 - Solid drawing material - Google Patents

Solid drawing material Download PDF

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Publication number
JP4458511B2
JP4458511B2 JP2003144207A JP2003144207A JP4458511B2 JP 4458511 B2 JP4458511 B2 JP 4458511B2 JP 2003144207 A JP2003144207 A JP 2003144207A JP 2003144207 A JP2003144207 A JP 2003144207A JP 4458511 B2 JP4458511 B2 JP 4458511B2
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JP
Japan
Prior art keywords
drawing material
writing
solid drawing
pigments
wax
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 - Fee Related
Application number
JP2003144207A
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Japanese (ja)
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JP2004346176A (en
JP2004346176A5 (en
Inventor
貴志 冨澤
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.)
Pilot Corp
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Pilot Corp
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
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Priority to JP2003144207A priority Critical patent/JP4458511B2/en
Publication of JP2004346176A publication Critical patent/JP2004346176A/en
Publication of JP2004346176A5 publication Critical patent/JP2004346176A5/ja
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Publication of JP4458511B2 publication Critical patent/JP4458511B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、画線が密で滑らかな書き味を有し、乾燥による性能劣化のない固形描画材に関する。
【0002】
【従来の技術】
従来固形描画材としては一般的にクレヨンが知られており、その成分として着色材の他にワックスを主材として用いているため、例えばドライアップもなく、経時変化は極めて良好である。しかしその書き味は、ワックス特有のねばつくような重い書き味であり、しかも画線が粗く、塗りむらが生じて下地が見えてしまうという問題がある。このため、書き味が滑らかで画線が密となる、液体筆記具の筆感に近い固形描画材が種々検討されており、例えばゲル化剤を使用した固形描画材が知られている。このゲル化剤として、代表的には脂肪族カルボン酸塩などが挙げられ、これを主成分として着色材や水などを添加して得られた固形描画材は、従来のクレヨンと比べ、液体筆記具に近い極めて滑らかな書き味を有すると共に、画線も密となり、描画材としてばかりでなく、例えばラインマーカーのような用途にも十分適用できるものとなる。またこの他に、油性のゲル化剤を用いることも知られている(特許文献1参照)(特許文献2参照)(特許文献3参照)
【0003】
【特許文献1】
特開平8−120209号公報
【特許文献2】
特開平8−245916号公報
【特許文献3】
特開平8−302269号公報
【0004】
【発明が解決しようとする課題】
しかしながら、水性のゲル化剤を用いた場合、水が含有されているのでドライアップの問題が生じる。このため、蒸発しないような気密容器が必要となるが、使用中に外気にさらす状態も多く、どうしても経時変化は避けられない。水が蒸発すると、径が縮小して容器から抜け落ちたり、初期の滑らかな書き味が失われ、ワックス系のクレヨンに近い書き味となってしまう。これを防ぐ方法として、グリコール系溶剤を保湿剤として添加したり、さらに非イオン性界面活性剤を添加する方法が検討されているが、これも添加しないよりは効果はあがるものの、基本的にドライアップを防止することはできない。例えば水がなくなった場合には、グリコール系溶剤のみでは描画材の書き味はざらついてしまって良好なものは得られ難いし、非イオン性界面活性剤のみでも同様である。即ち、滑らかな書き味や密な画線を得るためには、水が必要不可欠なものとなっているのである。このため、水性のゲル化剤ではなく油性のゲル化剤、例えばベンジリデンソルビトール類などを用い、水の代わりに有機溶剤を用いる方法が検討されている。この方法で得られた固形描画材は、書き味や画線などは好ましいものの、主溶剤として揮発性の極めて高い有機溶剤を用いているため、ドライアップは避けられず、この問題を回避するために蒸発抑制成分を添加しているが、十分な解決とはならない。
【0005】
【課題を解決するための手段】
本発明は、ドライアップが生ぜず経時変化に優れ、それと共に液体筆記具に近い極めて滑らかな書き味(筆感)が得られ、画線も密となる固形描画材を提供するもので、少なくとも着色材と12−ヒドロキシステアリン酸とワックスおよびポリプロピレングリコールからなり、12−ヒドロキシステアリン酸の配合量が10〜50重量%であり、密な画線を維持する作用を有することを要旨とする。
【0006】
【発明の実施の形態】
本発明は、油溶性のゲル化剤として12−ヒドロキシステアリン酸を用いる。12−ヒドロキシステアリン酸の配合量としては、固形描画材の全重量に対して10〜50重量%の範囲が用いられる。10重量%以下だと、ゲルによる成形性が困難となり、強度も低くなる。また50重量%以上では、ゲル化剤が多くなって書き味など塗布性が劣化してしまう。
【0007】
本発明の有機溶剤としては、少なくともポリプロピレングリコールを用いる。ポリプロピレングリコールはグリコール類に含まれ、外観が無色液状で油溶性の有機溶剤であり、水には不溶である。例えばグリセリン、エチレングリコール、プロピレングリコール、ポリエチレングリコール、ジエチレングリコールなども同じグリコール類であるが、これらはいずれも水溶性であり、水を用いた水性ゲル化剤中では保湿剤としての効果は有するものの、ドライアップを完全に防ぐことは困難であり、ドライアップ後の描画材の性能は前記したように水がなくなると従来のクレヨンと同じになってしまう。また、前記グリコール類を油性ゲル化剤に用いた時には、ドライアップは生じないものの、特に低分子量のものは吸湿性が高いため経時変化に劣り、これを防止するため分子量の高い固体あるいはペースト状のものを用いると、書き味が劣化して硬くなってしまう。これに対し、少なくともポリプロピレングリコールを溶剤として用いた固形描画材は、水を用いた時と遜色のない書き味、画線を有し、しかも油性でかつ100℃以上の高融点であるためドライアップや吸湿性もなく、経時変化も良好となるのである。
【0008】
上記ポリプロピレングリコールとゲル化剤として12−ヒドロキシステアリン酸との組み合わせが最も良好な性能が得られるのである。なお、ポリプロピレングリコールを主溶剤として、他の油性の溶剤を添加してもよい。ポリプロピレングリコールの配合量は、固形描画材全重量に対し10〜70重量%が好ましい。10重量%以下ではゲル化が困難となり、70重量%以上では均一なゲルが形成できなくなる。
【0009】
本発明に用いる着色材としては、従来公知の顔料、染料であればいずれも用いることができ、例えば無機顔料、有機顔料、白色顔料、パール顔料、金属顔料、蛍光顔料などが挙げられ、単独もしくは組み合わせて用いる。具体的には、無機顔料としてカーボンブラック、鉄黒、群青、紺青、弁柄などが、また有機顔料としてはアゾ系顔料、インジゴ系顔料、フタロシアニン系顔料、キナクリドン系顔料、チオインジゴ系顔料などが挙げられ、白色顔料としては酸化チタン、酸化亜鉛、亜鉛華などが挙げられる。また染料としては、特に油溶性染料も好適に用いることができ、例えばフタロシアニン系染料、ピラゾロン系染料、ニグロシン系染料、アントラキノン系染料、アゾ系染料など公知のものが挙げられる。着色材の配合量は、固形描画材全量に対し1〜50重量%が好ましい。なお顔料として、金属箔顔料やガラスフレーク顔料などの光輝性顔料を添加してもよい。
【0010】
上記成分以外に、滑材としてワックスを添加する。ワックスとしては、従来公知のものであれば何でもよく、例えば密ろう、木ろう、カルナバワックス、キャンデリラワックス、モンタンワックス、パラフィンワックス、マイクロクリスタリンワックス、低分子量ポリエチレンなどが挙げられる。さらに、上記成分以外に粘着材としての樹脂を、書き味を阻害しない範囲で添加してもよい。樹脂としては天然樹脂、合成樹脂が挙げられ、例えばポリ塩化ビニル、ポリ酢酸ビニル、テルペン、ニトロセルロース、酢酸ビニル、ロジンエステルなどの熱可塑性樹脂が好ましい。また成分どおしの相溶化のために非イオン性、陽イオン性、陰イオン性などの界面活性剤を添加してもよい。この他必要に応じて、ゲル化補助剤、粘度調整剤などを添加してもよい。
【0011】
次に、本発明の製造方法としては上記成分を混合し、加熱溶解してゾル状とし、このゾルを所定の型内に充填、冷却してゲル化させ、型内より取り出して固形描画材とする。次に、本発明の実施例を述べる。なお、「部」は「重量部」である。
【0012】
【実施例】
(実施例1)
12−ヒドロキシステアリン酸 28部
顔料(フタロシアニンブルー) 16部
ポリプロピレングリコール♯1000 48部
木ろう 8部
上記成分を95℃に加熱混合し、得られたゾル状の液状物を内径8mmの型内に流し込み、冷却・固化させて、青色の固形描画材とした。得られた固形描画材は、書き味が極めて滑らかで、しかも画線にむらがなく密であり、気密容器に入れずに50℃中に1ヶ月放置してもドライアップがなく、その性能は変わらなかった。
【0013】
(比較例1)
ステアリン酸ナトリウム 25部
顔料(フタロシアニンブルー) 5部
グリセリン 35部
水 35部
上記成分を90℃に加熱混合し、得られたゾル状の液状物を内径8mmの型内に流し込み、冷却・固化させて、青色の固形描画材とした。得られた固形描画材は、書き味が極めて滑らかで、しかも画線は密となる。しかし、使用中あるいは外気にさらしておくとドライアップが生じ、水の蒸発に伴い書き味、画線ともワックス系のクレヨンに近くなり、ねばつくような重い書き味で、画線もむらのあるものとなった。
【0014】
(比較例2)
実施例1のポリプロピレングリコールの代わりに分子量♯400の液状のポリエチレングリコールを用い、実施例1と同様の工程にて固形描画材を作製した。得られた固形描画材は、当初書き味、画線とも良好なものとなったが、水の吸湿や浸み出しが生じ、経時変化してしまう。
【0015】
【発明の効果】
以上、本発明はドライアップせずに良好な経時変化を有し、かつ極めて滑らかな書き味(筆感)と塗りむらのない密な画線を有する固形描画材となった。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a solid drawing material having dense and smooth writing lines and no performance deterioration due to drying.
[0002]
[Prior art]
Conventionally, crayons are generally known as a solid drawing material, and since wax is used as a main material in addition to a colorant as its component, for example, there is no dry-up, and the change with time is very good. However, the writing is a sticky and heavy writing characteristic peculiar to wax, and there is a problem that the image line is rough, uneven coating occurs, and the background can be seen. For this reason, various solid drawing materials close to the writing feel of a liquid writing instrument that have a smooth writing feel and a dense line are studied. For example, solid drawing materials using a gelling agent are known. Typical examples of the gelling agent include aliphatic carboxylates, and the solid drawing material obtained by adding a coloring material, water, etc. as a main component is a liquid writing instrument as compared with a conventional crayon. In addition to having a very smooth writing taste close to, the image line is also dense, so that it can be sufficiently applied not only as a drawing material but also for uses such as a line marker. In addition, it is also known to use an oily gelling agent (see Patent Document 1) (see Patent Document 2) (see Patent Document 3) .
[0003]
[Patent Document 1]
JP-A-8-120209 [Patent Document 2]
JP-A-8-245916 [Patent Document 3]
Japanese Patent Laid-Open No. 8-302269
[Problems to be solved by the invention]
However, when an aqueous gelling agent is used, the problem of dry-up occurs because water is contained. For this reason, an airtight container that does not evaporate is necessary, but there are many cases where the container is exposed to the outside air during use, and aging is unavoidable. When water evaporates, the diameter decreases and falls out of the container, and the initial smooth writing taste is lost, resulting in a writing taste close to that of a wax-based crayon. As a method for preventing this, a method of adding a glycol solvent as a moisturizer or a method of adding a nonionic surfactant has been studied. It cannot be prevented. For example, when the water runs out, the writing quality of the drawing material is rough with only the glycol solvent, and it is difficult to obtain a good one, and the same is true with only the nonionic surfactant. That is, water is indispensable in order to obtain a smooth writing taste and a dense line. For this reason, an oil-based gelling agent, such as benzylidene sorbitols, is used instead of an aqueous gelling agent, and an organic solvent is used instead of water. In order to avoid this problem, the solid drawing material obtained by this method is preferable in terms of writing quality, image line, etc., but uses a highly volatile organic solvent as the main solvent, so that dry-up is inevitable. Although an evaporation inhibitor component is added to the above, it is not a sufficient solution.
[0005]
[Means for Solving the Problems]
The present invention provides a solid drawing material in which dry-up does not occur and is excellent in change over time, and at the same time, an extremely smooth writing taste (writing feeling) close to that of a liquid writing instrument is obtained, and the image line is dense. It consists of a material, 12-hydroxystearic acid, a wax, and polypropylene glycol, and the blending amount of 12-hydroxystearic acid is 10 to 50% by weight, and has the function of maintaining a dense image .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, 12-hydroxystearic acid is used as an oil-soluble gelling agent. As a compounding quantity of 12-hydroxystearic acid, the range of 10 to 50 weight% is used with respect to the total weight of a solid drawing material . If it is 10% by weight or less, the moldability with gel becomes difficult and the strength becomes low. On the other hand, if it is 50% by weight or more, the gelling agent increases and the applicability such as writing taste is deteriorated.
[0007]
As the organic solvent of the present invention, at least polypropylene glycol is used. Polypropylene glycol is contained in glycols, is an organic solvent that is colorless and liquid in appearance, and insoluble in water. For example, glycerin, ethylene glycol, propylene glycol, polyethylene glycol, diethylene glycol, and the like are the same glycols, but they are all water-soluble, and have an effect as a moisturizer in an aqueous gelling agent using water, It is difficult to completely prevent the dry-up, and the performance of the drawing material after the dry-up becomes the same as a conventional crayon when the water is exhausted as described above. In addition, when the glycols are used as an oily gelling agent, dry-up does not occur. However, those having a low molecular weight have a high hygroscopic property and are inferior in change over time, and in order to prevent this, a solid or paste form having a high molecular weight. If it is used, the writing quality will deteriorate and become hard. On the other hand, solid drawing materials using at least polypropylene glycol as a solvent have a writing taste and image line comparable to those when using water, and are oily and have a high melting point of 100 ° C. or higher, so it is dry-up. There is no hygroscopicity and the change with time is good.
[0008]
A combination of the polypropylene glycol and 12-hydroxystearic acid as a gelling agent provides the best performance. In addition, you may add another oil-based solvent by making polypropylene glycol into a main solvent. The blending amount of polypropylene glycol is preferably 10 to 70% by weight based on the total weight of the solid drawing material. If it is 10% by weight or less, gelation becomes difficult, and if it is 70% by weight or more, a uniform gel cannot be formed.
[0009]
As the coloring material used in the present invention, any of conventionally known pigments and dyes can be used, and examples thereof include inorganic pigments, organic pigments, white pigments, pearl pigments, metal pigments, fluorescent pigments, and the like. Use in combination. Specifically, carbon black, iron black, ultramarine blue, bitumen, petal, etc. as inorganic pigments, and azo pigments, indigo pigments, phthalocyanine pigments, quinacridone pigments, thioindigo pigments, etc. as organic pigments Examples of white pigments include titanium oxide, zinc oxide, and zinc white. As the dye, oil-soluble dyes can also be suitably used, and examples thereof include known dyes such as phthalocyanine dyes, pyrazolone dyes, nigrosine dyes, anthraquinone dyes, and azo dyes. The blending amount of the coloring material is preferably 1 to 50% by weight with respect to the total amount of the solid drawing material. In addition, you may add bright pigments, such as a metal foil pigment and a glass flake pigment, as a pigment.
[0010]
In addition to the above components , wax is added as a lubricant. Waxes, conventionally well anything as long as conventional ones, for example beeswax, Japan wax, carnauba wax, candelilla wax, montan wax, paraffin wax, microcrystalline wax, Ru include low molecular weight polyethylene. Furthermore, you may add resin as an adhesive material in the range which does not inhibit writing taste besides the said component. Examples of the resin include natural resins and synthetic resins. For example, thermoplastic resins such as polyvinyl chloride, polyvinyl acetate, terpene, nitrocellulose, vinyl acetate, and rosin ester are preferable. For compatibilizing the components, nonionic, cationic and anionic surfactants may be added. In addition, if necessary, a gelling aid, a viscosity modifier, and the like may be added.
[0011]
Next, as the production method of the present invention, the above components are mixed, dissolved by heating to form a sol, this sol is filled into a predetermined mold, cooled to be gelled, taken out from the mold and taken as a solid drawing material. To do. Next, examples of the present invention will be described. “Parts” is “parts by weight”.
[0012]
【Example】
Example 1
12-hydroxystearic acid 28 parts Pigment (phthalocyanine blue) 16 parts Polypropylene glycol # 1000 48 parts Wood wax 8 parts The above ingredients are heated and mixed at 95 ° C, and the resulting sol-like liquid is poured into a mold having an inner diameter of 8 mm. Then, it was cooled and solidified to obtain a blue solid drawing material. The resulting solid drawing material is extremely smooth in writing, and has no unevenness in the image line, and does not dry up even if left in a 50 ° C. for one month without being placed in an airtight container. It didn't change.
[0013]
(Comparative Example 1)
Sodium stearate 25 parts Pigment (phthalocyanine blue) 5 parts Glycerin 35 parts Water 35 parts The above ingredients are heated and mixed at 90 ° C, and the resulting sol-like liquid is poured into a mold with an inner diameter of 8 mm, cooled and solidified. A blue solid drawing material was obtained. The obtained solid drawing material is very smooth in writing and has a dense line. However, when it is in use or exposed to the open air, dry-up occurs, and as the water evaporates, both the writing and drawing lines become close to wax-based crayons. It became a thing.
[0014]
(Comparative Example 2)
A solid drawing material was prepared in the same manner as in Example 1 except that liquid polyethylene glycol having a molecular weight of # 400 was used instead of the polypropylene glycol in Example 1. The obtained solid drawing material had good initial writing quality and image line, but water absorption and oozing occurred and changed over time.
[0015]
【The invention's effect】
As described above, the present invention provides a solid drawing material having a good change with time without being dried up, and having a very smooth writing feeling (writing feeling) and a dense image without uneven coating.

Claims (1)

少なくとも着色材と12−ヒドロキシステアリン酸とワックスおよびポリプロピレングリコールからなり、12−ヒドロキシステアリン酸の配合量が10〜50重量%であることを特徴とする固形描画材。At least a coloring material and 12-hydroxystearic consists stearate and a wax and polypropylene glycol, solid drawing material the amount of the 12-hydroxystearic acid is characterized in that 10 to 50% by weight.
JP2003144207A 2003-05-22 2003-05-22 Solid drawing material Expired - Fee Related JP4458511B2 (en)

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JP2004346176A5 JP2004346176A5 (en) 2006-06-29
JP4458511B2 true JP4458511B2 (en) 2010-04-28

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4726197B2 (en) * 2005-04-21 2011-07-20 株式会社パイロットコーポレーション Solid drawing material
JP5520714B2 (en) * 2010-06-30 2014-06-11 株式会社パイロットコーポレーション Firing pencil lead
JP7257757B2 (en) * 2018-08-29 2023-04-14 株式会社パイロットコーポレーション Reversible thermochromic solid drawing material and reversible thermochromic solid drawing material set using the same

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