JPH0341505B2 - - Google Patents

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Publication number
JPH0341505B2
JPH0341505B2 JP57057986A JP5798682A JPH0341505B2 JP H0341505 B2 JPH0341505 B2 JP H0341505B2 JP 57057986 A JP57057986 A JP 57057986A JP 5798682 A JP5798682 A JP 5798682A JP H0341505 B2 JPH0341505 B2 JP H0341505B2
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JPS58176261A (en
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Description

【発明の詳现な説明】[Detailed description of the invention]

本発明は、筆蚘甚具あるいは蚘録ヘツドのオリ
フむスから液滎を飛翔させお蚘録を行うむンクゞ
゚ツト方匏、特に熱゚ネルギヌを利甚するむンク
ゞ゚ツト方匏に䜿甚するのに奜適な蚘録液及びこ
れを甚いたむンクゞ゚ツト蚘録方法に関する。 埓来から玙などの蚘録郚材に蚘録を行う筆蚘甚
具䞇幎筆・プルトペン等には、むンクずし
お各皮の染料を氎たたはその他の有機溶剀に溶解
させたものが䜿甚されおいる。 たた、ピ゚ゟ振動子による振動あるいは高電圧
印加による静電匕力などにより、蚘録ヘツド内の
液䜓を吐出させお蚘録を行なう所謂むンクゞ゚ツ
ト方匏に斌いおも、各皮染料を氎たたは有機溶剀
などに溶解させたむンクを䜿甚するこずが知られ
おいる。しかし、䞀般の文具甚のむンクに比べる
ずむンクゞ゚ツト甚のむンクには、倚くの特性で
䞀局厳栌な条件が芁求される。 むンクゞ゚ツト蚘録法は、隒音の発生が少な
く、普通玙に察しお特別の定着凊理を芁するこず
なく、高速蚘録あるいはカラヌ蚘録が行なえるも
のであり、皮々のタむプのものが掻発に研究され
おいる。 この皮の蚘録方匏では、いずれにおいおも䜿甚
されるむンキの特性ずしお、粘床、衚面匵力等の
物性倀が適正な範囲にあるこず、溶解物の溶解安
定性が高く埮现なオリフむスを目詰りさせないこ
ず、充分に高い濃床の蚘録画像を䞎えるこず、保
存䞭に物性倀の倉化あるいは固圢分の析出が生じ
ないこずなどが芁求される。曎に䞊蚘の特性に加
え、蚘録郚材の皮類に制限されずに蚘録が行なえ
るこず、定着速床が倧きいこず、耐氎性、耐溶剀
性特に耐アルコヌル性、耐光性、耐摩耗性に
優れおいるこず、解像床に優れた画像を䞎えるこ
ずなどの性質も芁求されおいる。 むンゞ゚クト蚘録法の䞭でも、䟋えば特開昭54
−51837号に開瀺された方法では、熱゚ネルギヌ
を䜜甚させお液滎吐出の原動力を埗るずいう点に
斌いお他の方法ずは倧きく異な぀おいる。すなわ
ち、この方法に斌いおは、䟛絊蚘録信号に応じお
蚘録ヘツド郚に熱゚ネルギヌを発生させ、該熱゚
ネルギヌの䜜甚を受けた蚘録液に気泡の発生、生
長、消滅が瞬時に生じ、それに䌎う蚘録液の圧力
゚ネルギヌの倉化によ぀お蚘録ヘツド郚先端のオ
リフむスから液滎を飛翔させお蚘録を行う。この
蚘録方法は所謂オンデマンド方匏の蚘録に察しお
極めお有効であるこずに加え、蚘録ヘツド郚を高
密床マルチオリフむス化しお、フルラむンタむプ
の蚘録操䜜が容易に実珟できるため、高解像床の
画像を高速で埗られるずいう利点を有しおいる。 しかしながら、この蚘録方法に斌いおは熱゚ネ
ルギヌが蚘録液に察しお盎接加えられ、特に気泡
発生郚に斌いおは瞬時的には250℃を越える枩床
に達する。したが぀お、長時間に亘る連続蚘録性
あるいは長時間の蚘録䌑止埌の吐出安定性を満足
させるための蚘録液特性ずしおは、前蚘䞀般的な
むンクゞ゚ツト甚むンク特性に加え、特に熱的に
溶解安定性が高くオリフむスの目詰りを生じない
こず、熱的にむンクの色調に倉化が生じないこず
などの他の特性が加重しお芁求される。しかし、
これら党おの特性を満たす蚘録液は埓来知られお
いなか぀た。 本発明の目的は、プルトペンなどの筆蚘甚具
甚およびむンクゞ゚ツト蚘録甚の蚘録液を提䟛す
るこずにある。 本発明の他の目的は、特に熱゚ネルギヌを利甚
するむンクゞ゚ツト蚘録甚の蚘録液で、蚘録ヘツ
ドの寿呜を延ばしか぀長時間に亘る蚘録安定性の
高い蚘録液及びこれを甚いたむンクゞ゚ツト蚘録
方法を提䟛するこずにある。 䞊蚘および他の目的は以䞋の本発明によ぀お達
成される。 すなわち本発明は、䞋蚘䞀般匏 で衚わされる化合物を含有するこずを特城ずする
蚘録液である。 䜆し、は任意の眮換基で眮換され若しくは眮
換されない−ナフチレン基を衚わし、ベン
れン環およびナフタレン環は任意の眮換基で
眮換され埗るが、少なくずもその䞀方はOH基、
SO3M基、COOM基およびNRR′基の少なくずも
䞀぀の眮換基で眮換されたベンれン環たたはナフ
タレン環を衚わし、ここではアルカリ金属、ア
ンモニりムおよびアミン類から遞ばれる塩基を瀺
し、及びR′はそれぞれ独立しお氎玠たたは眮
換されおいおもよいアルキル若しくはプニル基
を瀺す。たたベンれン環、ナフタレン環およ
びが同時にSO3M基を有するこずはない。 たた本発明は、蚘録液に熱゚ネルギヌを䜜甚さ
せおオリフむスから液滎ずしお吐出させお蚘録を
行なうむンクゞ゚ツト蚘録方法においお、前蚘蚘
録液が䞋蚘䞀般匏 〔䜆し、匏䞭、は任意の眮換基で眮換され若し
くは眮換されない−ナフチレン基を衚わ
し、ベンれン環およびナフタレン環は任意の
眮換基で眮換され埗るが、少なくずもその䞀方は
OH基、SO3M基、COOM基およびNRR′基の少
なくずも䞀぀の眮換基で眮換されたベンれン環た
たはナフタレン環を衚わし、ここではアルカリ
金属、アンモニりムおよびアミン類から遞ばれる
塩基を瀺し、及びR′はそれぞれ独立しお氎玠
たたは眮換されおいおもよいアルキル基若しくは
プニル基を瀺すが、ベンれン環、ナフタレン
環およびが同時にSO3M基を有するこずはな
い。〕 で衚わされる化合物を含むこずを特城ずするむン
クゞ゚ツト蚘録方法である。 䞊蚘䞀般匏で衚わされる化合物䞭、奜たしい化
合物はその分子䞭に少なくずも䞀぀のOH基、
SO3M基、COOM基たたはNH2基を有するもの
である。たたずしおは、ハロゲン原子、OH
基、SO3M基、COOM基、NH2基、NO2基、炭
玠原子数が〜のアルキル基若しくは炭玠原子
数が〜のアルコキシ基で眮換されたたは眮換
されない、−ナフチレン基が奜たしい。ベ
ンれン環およびナフタレン環の奜たしい眮換
基ずしおは、ハロゲン原子、OH基、SO3M基、
COOM基、NRR′基、NO2基、炭玠原子数が〜
のアルキル基および炭玠原子数が〜のアル
コキシ基があげられる。たた、およびR′はそ
れぞれ独立しお、氎玠、炭玠原子数が〜のア
ルキル基たたは眮換基を有しおよいベンゞル基で
あるこずが奜たしい。 より奜たしい化合物は、ナフタレン環が䜍
および䜍の少なくずも䞀方にOH基、か぀限定
されない䜍眮にSO3M基を有するものである。 本発明の蚘録液に含有される前蚘䞀般匏の化合
物染料は、蚘録液液媒に察しお䞀般に10重量
以䞊の溶解性を有し、たた䜎枩−30℃皋床
での溶解安定性も高い。さらに該化合物は分子内
にアゟ結合−−を有するため、蚘録液
が蚘録ヘツド内の熱䜜甚においお瞬間的に250℃
を越える高枩に曝され該化合物が分解したずしお
も、䞻にアゟ結合郚分で切断が生ずるものず掚定
される。そしお、たずえ分解が生じたずしおも、
該化合物からの分解生成物自䜓が比范的安定であ
り、か぀その倚くがSO3M基あるいはOH基など
の芪氎性の倧きい基を有しおいるため、䟝然ずし
お蚘録液に察しお倧きな溶解性を有しおいる。こ
のため長期に亘る連続蚘録においおも蚘録ヘツド
郚内に沈積物を生ずるこずなく安定した蚘録が可
胜になる。もちろん、耐候性、耐オゟン性、印字
物の耐氎性、耐アルコヌル性、さらには毒性等の
筆蚘甚具あるいはむンクゞ゚ツト甚むンクの染料
に芁求される他の性胜に぀いおも十分なものであ
る。 本発明の蚘録液に含有される前蚘䞀般匏の化合
物ずしおは、具䜓的には以䞋のような化孊構造の
塗料があげられる。 これら化合物のスルホン酞基ず結合しおスルホ
ン酞塩を圢成する塩基ずしおは、より具䜓的には
Na+、K+、Li+、Ca+などのアルカリ金属カチオ
ン、NH4 +、NHC2H4OH+ 3などの第四玚アンモ
ニりムカチオンおよびC2H53などのアミン類
があげられる。 本発明の蚘録液においおは、これら染料が、蚘
録液に察しお通垞0.5〜20重量、奜たしくは0.5
〜15重量、より奜たしくは〜10重量の濃床
で甚いられる。該塗料はもちろん単独で若しくは
皮以䞊を組合わせお、あるいは該染料を必須成
分ずしおこの他に他の盎接染料、酞性染料などの
各皮染料を䜵甚しお䜿甚するこずができる。 本発明の蚘録液を組成するための液媒䜓成分ず
しおは、氎あるいは氎ず氎溶性の各皮有機溶剀ず
の混合物が䜿甚される。氎溶性の有機溶剀ずしお
は、䟋えば、メチルアルコヌル、゚チルアルコヌ
ル、−プロピルアルコヌル、む゜プロピルアル
コヌル、−ブチルアルコヌル、sec−ブチルア
ルコヌル、tert−ブチルアルコヌル、む゜ブチル
アルコヌル等の炭玠数〜のアルキルアルコヌ
ル類ゞメチルホルムアミド、ゞメチルアセトア
ミド等のアミド類アセトン、ゞアセトンアルコ
ヌル等のケトン又はケトンアルコヌル類テトラ
ヒドロフラン、ゞオキサン等の゚ヌテル類−
メチル−−ピロリドン、−ゞメチル−
−むミダゟリゞノン等の含窒玠耇玠環匏ケトン
類ポリ゚チレングリコヌル、ポリプロリレング
リコヌル等のポルアルキレングリコヌル類、゚
チレングリコヌル、プロピレングリコヌル、ブチ
レングリコヌル、トリ゚チレングリコヌル、
−ヘキサントリオヌル、チオゞグリコヌ
ル、ヘキシレングリコヌル、ゞ゚チレングリコヌ
ル等のアルキレン基が〜個の炭玠原子を含む
アルキレングリコヌル類グリセリン゚チレン
グリコヌルメチル゚ヌテル、ゞ゚チレングリコヌ
ルメチル又ぱチル゚ヌテル、トリ゚チレン
グリコヌルモノメチル又ぱチル゚ヌテル等
の倚䟡アルコヌルの䜎玚アルキル゚ヌテル類等が
あげられる。 これらの倚くの氎溶性有機溶剀の䞭でも、倚䟡
アルコヌルのゞ゚チレングリコヌル、倚䟡アルコ
ヌルの䜎玚アルキル゚ヌテルのトリ゚チレングリ
コヌルモノメチル又ぱチル゚ヌテル等は、
奜たしいものである。 蚘録液䞭の䞊蚘氎溶性有機溶剀の含有量は、䞀
般には蚘録液党重量に察しお重量パヌセントで
〜95、奜たしくは10〜80、より奜たしくは20
〜50の範囲内ずされる。 この様な成分から調合される本発明の蚘録液
は、筆蚘甚具の蚘録液あるいは所謂むンクゞ゚ツ
ト蚘録甚の蚘録液ずしおそれ自䜓で蚘録特性信
号応答性、液滎圢成の安定性、吐出安定性、長時
間の連続蚘録性、長期間の蚘録䌑止埌の吐出安定
性保存安定性、蚘録剀の溶解安定性、蚘録郚材
ぞの定着性、あるいは蚘録画像の耐光性、耐候
性、耐氎性、耐アルコヌル性等いずれもバランス
のずれた優れたものである。そしおこの様な特性
を曎に改良するために、埓来から知られおいる各
皮添加剀を曎に添加含有させおも良い。 このような添加剀ずしおは、䟋えば、ポリビニ
ルアルコヌル、セルロヌス類、氎溶性暹脂等の粘
床調敎剀カチオン、アニオン或いはノニオン系
の各皮界面掻性剀ゞ゚タノヌルアミン、トリ゚
タノヌルアミン等の衚面匵力調敎剀緩衝剀によ
るPH調敎剀等をあげるこずができる。 蚘録液を垯電するタむプの蚘録方法に䜿甚され
る蚘録液を調合するためには、塩化リチりム、塩
化アンモニりム、塩化ナトリりム等の無機塩類等
の比抵抗調敎剀が䜿甚される。たた吐出オリフむ
ス先端での保氎性向䞊剀ずしお尿玠、チオ尿玠が
奜適に䜿甚される。尚、熱゚ネルギヌを䜜甚によ
぀お蚘録液を吐出させるタむプの堎合には、熱的
な物性倀䟋えば、比熱、熱膚匵係数、熱䌝導率
等が調敎されるこずもある。 本発明の蚘録液を所謂筆蚘甚具の蚘録液ずしお
利甚する際には、粘床、皮々の材質の蚘録郚材ず
の芪和性等を考慮しお物性倀を調敎する必芁があ
る。 本発明を以䞋の実斜䟋で曎に詳现に説明する。 実斜䟋  熱゚ネルギヌの䜜甚によりむンクを飛翔させる
むンクゞ゚ツト蚘録甚の蚘録ヘツドを以䞋のよう
にしお䜜成した。たずアルミナ基板䞊にSiO2å±€
䞋郚局をスパツタリングにより5Ό厚に圢成
し、続いお発熱抵抗局ずしおHfB2を1000Å厚に、
さらにアルミニりムを電極ずしお3000Å厚に積局
した埌、遞択゚ツチングによ぀お50Ό×200Ό
の発熱抵抗䜓パタヌンを圢成した。次にSiO2å±€
をスパツタリングにより3500Å厚に保護局䞊郚
局ずしお積局しお基板䞊に電気・熱倉換䜓を圢
成した埌、幅50Ό×深さ50Όの溝を刻んだガ
ラス板を溝ず発熱抵抗䜓が合臎するように接合し
た。匕続いお発熱抵抗䜓の先端ずオリフむスの距
離が250Όになるようにオリフむス端面を研磚
しお蚘録ヘツドを䜜成した。 䞀方、蚘録液は、前出のNo.の化孊構造匏を有
する染料を甚いお、䞋蚘の配合にしたが぀お䜜成
した。 構造匏No.の塗料 重量郚 ゞ゚チレングリコヌル 25 〃 −メチル−−ピロリドン 20 〃 æ°Ž 52 〃 䞊蚘の配合各成分は、容噚の䞭で充分混合容解
し、孔埄1Όのテフロンフむルタヌで加圧ろ過し
た埌、真空ポンプを甚いお脱気凊理しお蚘録液ず
した。 この蚘録液を前蚘の蚘録ヘツドに䟛絊し、連続
印字詊隓を実斜した。蚘録ヘツドぞは、10ÎŒsec、
40Vの矩圢電圧パルス印字信号を500ÎŒsecの呚期
で連続的に加えた。この結果、該蚘録液は150時
間の連続蚘録に十分耐え埗るものであ぀た。 実斜䟋 〜 染料の皮類および染料の配合量を代えたこずを
陀き実斜䟋ず同様にしお蚘録液を䜜成した。こ
れら蚘録液を甚いお実斜䟋ず同様な150時間の
連続印字詊隓を実斜した。䜆し、印字信号は
350ÎŒsecの呚期で加えた。これら詊隓における耐
久時間を衚に瀺す。なお、耐久時間はむンクの
飛翔が䞍安定になり、パルス信号に応じた蚘録が
できなくなり始めた時間をも぀お耐久時間ずし
た。
The present invention relates to a recording liquid suitable for use in an inkjet system in which recording is performed by ejecting liquid droplets from an orifice of a writing instrument or a recording head, particularly an inkjet system that uses thermal energy, and an inkjet recording method using the same. . BACKGROUND ART Writing instruments (fountain pens, felt pens, etc.) for recording on recording materials such as paper have traditionally used inks prepared by dissolving various dyes in water or other organic solvents. Furthermore, in the so-called inkjet method, in which recording is performed by discharging the liquid in the recording head using vibrations caused by a piezo vibrator or electrostatic attraction caused by the application of high voltage, various dyes are dissolved in water or organic solvents. It is known to use ink. However, compared to ink for general stationery, ink for ink jets is required to meet more stringent conditions in many characteristics. The inkjet recording method generates little noise and can perform high-speed recording or color recording on plain paper without requiring any special fixing treatment, and various types of inkjet recording methods are being actively researched. In this type of recording method, the ink used must have physical properties such as viscosity and surface tension within appropriate ranges, and must have high dissolution stability and not clog the fine orifice. , it is required to provide a recorded image with a sufficiently high density, and that physical property values do not change or solid content does not precipitate during storage. In addition to the above properties, it also has the ability to record without being restricted by the type of recording material, has a high fixing speed, and has excellent water resistance, solvent resistance (especially alcohol resistance), light resistance, and abrasion resistance. There are also demands for properties such as the ability to provide images with excellent resolution and high resolution. Among the injection recording methods, for example, JP-A-54
The method disclosed in No. 51837 differs greatly from other methods in that thermal energy is applied to obtain the motive force for ejecting droplets. That is, in this method, thermal energy is generated in the recording head section in response to a supplied recording signal, and bubbles are instantaneously generated, grown, and disappeared in the recording liquid that is affected by the thermal energy. Recording is performed by ejecting droplets from an orifice at the tip of the recording head due to changes in the pressure energy of the recording liquid. This recording method is not only extremely effective for so-called on-demand recording, but also has a high-density multi-orifice structure in the recording head and can easily realize full-line recording operations, making it possible to produce high-resolution images. It has the advantage that it can be obtained at high speed. However, in this recording method, thermal energy is directly applied to the recording liquid, and the temperature instantaneously reaches over 250°C, especially in the bubble generating area. Therefore, in addition to the above-mentioned general inkjet ink properties, recording liquid properties that satisfy continuous recording performance over a long period of time or ejection stability after a long period of recording suspension are particularly thermally stable. Other properties are also required, such as high performance, no clogging of orifices, and no change in ink color due to heat. but,
A recording liquid that satisfies all of these characteristics has not been known so far. An object of the present invention is to provide a recording liquid for writing instruments such as felt pens and for inkjet recording. Another object of the present invention is to provide a recording liquid for inkjet recording that uses thermal energy, which extends the life of a recording head and has high recording stability over a long period of time, and an inkjet recording method using the same. It's about doing. The above and other objects are achieved by the invention below. That is, the present invention is based on the following general formula This is a recording liquid characterized by containing a compound represented by: However, Q represents a 1,4-naphthylene group substituted with any substituent or not, and benzene ring A and naphthalene ring B may be substituted with any substituent, but at least one of them is an OH group,
represents a benzene ring or naphthalene ring substituted with at least one substituent of SO 3 M group, COOM group and NRR' group, where M represents a base selected from alkali metals, ammonium and amines, and R and R ' each independently represents hydrogen or an optionally substituted alkyl or phenyl group. Furthermore, benzene ring A, naphthalene rings B and Q do not simultaneously have an SO 3 M group. The present invention also provides an inkjet recording method in which recording is performed by applying thermal energy to a recording liquid and ejecting it as droplets from an orifice, in which the recording liquid has the following general formula: [However, in the formula, Q represents a 1,4-naphthylene group substituted with any substituent or not, and benzene ring A and naphthalene ring B may be substituted with any substituent, but at least one of them
represents a benzene ring or naphthalene ring substituted with at least one substituent of OH group, SO 3 M group, COOM group and NRR' group, where M represents a base selected from alkali metals, ammonium and amines; R and R' each independently represent hydrogen, an optionally substituted alkyl group, or a phenyl group, but benzene ring A and naphthalene rings B and Q do not simultaneously have an SO 3 M group. ] An inkjet recording method characterized by containing a compound represented by the following. Among the compounds represented by the above general formula, preferred compounds have at least one OH group in the molecule,
It has SO 3 M group, COOM group or NH 2 group. In addition, Q is a halogen atom, OH
1,4-, substituted or unsubstituted with a group, SO3M group, COOM group, NH2 group, NO2 group, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms; Naphthylene group is preferred. Preferred substituents for benzene ring A and naphthalene ring B include halogen atom, OH group, SO 3 M group,
COOM group, NRR' group, NO 2 group, number of carbon atoms is 1~
Examples include an alkyl group having 4 carbon atoms and an alkoxy group having 1 to 4 carbon atoms. Further, R and R' are preferably each independently hydrogen, an alkyl group having 1 to 4 carbon atoms, or a benzyl group which may have a substituent. A more preferred compound is one in which the naphthalene ring B has an OH group at at least one of the 1st and 8th positions, and an SO 3 M group at an unrestricted position. The compound (dye) of the general formula contained in the recording liquid of the present invention generally has a solubility of 10% by weight or more in the recording liquid medium, and has a low temperature (approximately -30°C).
It also has high dissolution stability. Furthermore, since this compound has an azo bond (-N=N-) in its molecule, the recording liquid can instantly reach temperatures of 250°C under the action of heat in the recording head.
Even if the compound were to be decomposed by being exposed to high temperatures exceeding 20%, it is presumed that the cleavage would occur mainly at the azo bond. And even if decomposition occurs,
The decomposition products themselves from these compounds are relatively stable, and many of them have highly hydrophilic groups such as SO 3 M groups or OH groups, so they still have high solubility in recording liquids. have. Therefore, stable recording is possible even during long-term continuous recording without forming deposits inside the recording head. Of course, other properties required of dyes for writing instruments or inkjet inks, such as weather resistance, ozone resistance, water resistance of printed matter, alcohol resistance, and even toxicity, are also sufficient. Specific examples of the compound of the general formula contained in the recording liquid of the present invention include paints having the following chemical structures. More specifically, the bases that combine with the sulfonic acid groups of these compounds to form sulfonate salts include:
Alkali metal cations such as Na + , K + , Li + , Ca + , quaternary ammonium cations such as NH 4 + , NH(C 2 H 4 OH) + 3 and amines such as N(C 2 H 5 ) 3 There are many types. In the recording liquid of the present invention, these dyes are usually 0.5 to 20% by weight, preferably 0.5% by weight, based on the recording liquid.
It is used at a concentration of ~15% by weight, more preferably 1-10% by weight. Of course, the paints can be used alone or in combination of two or more, or in combination with the dye as an essential component and various other dyes such as direct dyes and acid dyes. As a liquid medium component for composing the recording liquid of the present invention, water or a mixture of water and various water-soluble organic solvents is used. Examples of water-soluble organic solvents include alkyl alcohols having 1 to 4 carbon atoms such as methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, sec-butyl alcohol, tert-butyl alcohol, and isobutyl alcohol. Alcohols; Amides such as dimethylformamide and dimethylacetamide; Ketones or ketone alcohols such as acetone and diacetone alcohol; Ethers such as tetrahydrofuran and dioxane; N-
Methyl-2-pyrrolidone, 1,3-dimethyl-2
-Nitrogen-containing heterocyclic ketones such as imidazolidinone; polyalkylene glycols such as polyethylene glycol and polyprolylene glycol; ethylene glycol, propylene glycol, butylene glycol, triethylene glycol, 1,
Alkylene glycols in which the alkylene group contains 2 to 6 carbon atoms, such as 2,6-hexanetriol, thiodiglycol, hexylene glycol, diethylene glycol; glycerin; ethylene glycol methyl ether, diethylene glycol methyl (or ethyl) ether, triethylene glycol; Examples include lower alkyl ethers of polyhydric alcohols such as ethylene glycol monomethyl (or ethyl) ether. Among these many water-soluble organic solvents, diethylene glycol of polyhydric alcohol, triethylene glycol monomethyl (or ethyl) ether of lower alkyl ether of polyhydric alcohol, etc.
This is preferable. The content of the water-soluble organic solvent in the recording liquid is generally 5% by weight based on the total weight of the recording liquid.
~95%, preferably 10-80%, more preferably 20
It is considered to be within the range of ~50%. The recording liquid of the present invention prepared from such components can be used as a recording liquid for writing utensils or a recording liquid for so-called inkjet recording, and has excellent recording properties (signal response, droplet formation stability, ejection stability, etc.). long-term continuous recording performance, ejection stability after long-term recording cessation) storage stability, dissolution stability of the recording agent, fixation to the recording material, or light resistance, weather resistance, water resistance, and resistance of the recorded image. The alcohol content is well-balanced and excellent. In order to further improve such properties, various conventionally known additives may be further added and contained. Such additives include, for example, viscosity modifiers such as polyvinyl alcohol, celluloses, and water-soluble resins; various cationic, anionic, or nonionic surfactants; surface tension modifiers such as diethanolamine and triethanolamine; and buffers. Examples include PH adjusting agents using agents. In order to prepare a recording liquid used in a type of recording method in which the recording liquid is charged, a resistivity adjuster such as inorganic salts such as lithium chloride, ammonium chloride, and sodium chloride is used. Further, urea and thiourea are preferably used as water retention improvers at the tip of the discharge orifice. Incidentally, in the case of a type in which recording liquid is ejected by the action of thermal energy, thermal physical property values (for example, specific heat, coefficient of thermal expansion, thermal conductivity, etc.) may be adjusted. When the recording liquid of the present invention is used as a so-called recording liquid for writing instruments, it is necessary to adjust the physical property values in consideration of viscosity, compatibility with recording members made of various materials, etc. The invention will be explained in more detail in the following examples. Example 1 A recording head for ink jet recording in which ink is ejected by the action of thermal energy was prepared as follows. First, a SiO 2 layer (lower layer) was formed on an alumina substrate to a thickness of 5 ÎŒm by sputtering, and then HfB 2 was deposited to a thickness of 1000 Å as a heating resistor layer.
Furthermore, after laminating aluminum as an electrode to a thickness of 3000 Å, selective etching was performed to form a layer of 50 ÎŒm x 200 ÎŒm.
A heating resistor pattern was formed. Next, two layers of SiO were laminated as a protective layer (upper layer) to a thickness of 3500 Å by sputtering to form an electric/thermal converter on the substrate, and then a glass plate with grooves of 50 ÎŒm width x 50 ÎŒm depth was cut into the grooves. They were joined so that the heating resistors matched. Subsequently, the end face of the orifice was polished so that the distance between the tip of the heating resistor and the orifice was 250 ÎŒm to prepare a recording head. On the other hand, a recording liquid was prepared according to the following formulation using the dye having the chemical structural formula No. 1 mentioned above. Paint with structural formula No. 1 3 parts by weight diethylene glycol 25 〃 N-methyl-2-pyrrolidone 20 〃 Water 52 〃 The above ingredients were thoroughly mixed and dissolved in a container, and then pressurized using a Teflon filter with a pore size of 1ÎŒ. After filtration, it was degassed using a vacuum pump to obtain a recording liquid. This recording liquid was supplied to the recording head described above, and a continuous printing test was conducted. To the recording head: 10ÎŒsec,
A rectangular voltage pulse printing signal of 40 V was continuously applied at a period of 500 ÎŒsec. As a result, the recording liquid was sufficiently durable for 150 hours of continuous recording. Examples 2 to 7 Recording liquids were prepared in the same manner as in Example 1, except that the type of dye and the amount of dye blended were changed. A 150-hour continuous printing test similar to that in Example 1 was conducted using these recording liquids. However, the print signal
It was added at a period of 350ÎŒsec. Table 1 shows the durability times in these tests. The durability time was defined as the time when the ink flight became unstable and recording in accordance with the pulse signal began to become impossible.

【衚】【table】

【衚】 比范実隓 䟋瀺化合物No.〜11および䞋蚘構造の化合物を
甚いお、実斜䟋の方法に埓぀お蚘録液を䜜成し
た。 むンクゞ゚ツトプリンタヌBJ−130商品名
にこれらの蚘録液を搭茉しお、れロツクス4024箙
商品名を甚いお、印字物を䜜成した。この印
字物にスポむトで滎氎滎を付䞎し、30秒攟眮し
た埌でろ玙にお氎滎を拭きず぀たずころ、印字物
のにじみ、ODの䜎䞋は認められなか぀た。次
に、この印字物を宀枩で静氎に分間浞挬し、デ
ンシトメヌタヌで浞挬前埌の印字濃床の倉化を枬
定しお耐氎性を評䟡した。 濃床の枛少率が20未満のものを、20以䞊
35未満のものを、35以䞊50未満のものを
、50以䞊のものをずした。結果を次衚に瀺
す。
[Table] Comparative Experiment A recording liquid was prepared according to the method of Example 1 using Exemplified Compounds No. 1 to 11 and a compound having the following structure. Inkjet printer BJ-130 (product name)
These recording liquids were installed in the printer, and printed matter was created using Xerox 4024 paper (trade name). When one drop of water was applied to this printed matter with a dropper and left for 30 seconds, the water droplet was wiped off with a filter paper, and no bleeding or decrease in OD of the printed matter was observed. Next, this printed matter was immersed in still water for 5 minutes at room temperature, and the change in print density before and after immersion was measured using a densitometer to evaluate water resistance. If the concentration decrease rate is less than 20%, A: 20% or more.
Less than 35% was rated B, 35% or more but less than 50% was rated C, and 50% or more was rated D. The results are shown in the table below.

【衚】【table】

【衚】【table】

【衚】【table】

Claims (1)

【特蚱請求の範囲】  䞋蚘䞀般匏 で衚わされる化合物を含有するこずを特城ずする
蚘録液。 䜆し、匏䞭、は任意の眮換基で眮換され若し
くは眮換されない−ナフチレン基を衚わ
し、ベンれン環およびナフタレン環は任意の
眮換基で眮換され埗るが、少なくずもその䞀方は
OH基、SO3M基、COOM基およびNRR'基の少
なくずも䞀぀の眮換基で眮換されたベンれン環た
たはナフタレン環を衚わし、ここではアルカリ
金属、アンモニりムおよびアミン類から遞ばれる
塩基を瀺し、及びR′はそれぞれ独立しお氎玠
たたは眮換されおいおもよいアルキル基若しくは
プニル基を瀺す。たたベンれン環、ナフタレ
ン環およびが同時にSO3M基を有するこずは
ない。  蚘録液に熱゚ネルギヌを䜜甚させおオリフむ
スから液滎ずしお吐出させお蚘録を行なうむンク
ゞ゚ツト蚘録方法においお、前蚘蚘録液が䞋蚘䞀
般匏 〔䜆し、匏䞭、は任意の眮換基で眮換され若し
くは眮換されない−ナフチレン基を衚わ
し、ベンれン環およびナフタレン環は任意の
眮換基で眮換され埗るが、少なくずもその䞀方は
OH基、SO3M基、COOM基およびNRR′基の少
なくずも䞀぀の眮換基で眮換されたベンれン環た
たはナフタレン環を衚わし、ここではアルカリ
金属、アンモニりムおよびアミン類から遞ばれる
塩基を瀺し、及びR′はそれぞれ独立しお氎玠
たたは眮換されおいおもよいアルキル基若しくは
プニル基を瀺すが、ベンれン環、ナフタレン
環およびが同時にSO3M基を有するこずはな
い。〕 で衚わされる化合物を含むこずを特城ずするむン
クゞ゚ツト蚘録方法。
[Claims] 1. The following general formula A recording liquid characterized by containing a compound represented by: However, in the formula, Q represents a 1,4-naphthylene group substituted with any substituent or not, and benzene ring A and naphthalene ring B may be substituted with any substituent, but at least one of them is
represents a benzene ring or naphthalene ring substituted with at least one substituent of OH group, SO 3 M group, COOM group and NRR' group, where M represents a base selected from alkali metals, ammonium and amines, R and R' each independently represent hydrogen, an optionally substituted alkyl group, or a phenyl group. Furthermore, benzene ring A, naphthalene rings B and Q do not simultaneously have an SO 3 M group. 2. In an inkjet recording method in which recording is performed by applying thermal energy to a recording liquid and ejecting it as droplets from an orifice, the recording liquid has the following general formula: [However, in the formula, Q represents a 1,4-naphthylene group substituted with any substituent or not, and benzene ring A and naphthalene ring B may be substituted with any substituent, but at least one of them
represents a benzene ring or naphthalene ring substituted with at least one substituent of OH group, SO 3 M group, COOM group and NRR' group, where M represents a base selected from alkali metals, ammonium and amines, R and R' each independently represent hydrogen, an optionally substituted alkyl group, or a phenyl group, but benzene ring A and naphthalene rings B and Q do not simultaneously have an SO 3 M group. ] An inkjet recording method characterized by containing a compound represented by the following.
JP57057986A 1982-04-09 1982-04-09 Recording liquid Granted JPS58176261A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57057986A JPS58176261A (en) 1982-04-09 1982-04-09 Recording liquid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57057986A JPS58176261A (en) 1982-04-09 1982-04-09 Recording liquid

Publications (2)

Publication Number Publication Date
JPS58176261A JPS58176261A (en) 1983-10-15
JPH0341505B2 true JPH0341505B2 (en) 1991-06-24

Family

ID=13071325

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57057986A Granted JPS58176261A (en) 1982-04-09 1982-04-09 Recording liquid

Country Status (1)

Country Link
JP (1) JPS58176261A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0757087B1 (en) * 1995-07-14 1999-09-15 Mitsubishi Chemical Corporation A recording liquid suitable for ink-jet recording
JP6922381B2 (en) * 2017-04-27 2021-08-18 䞉菱ケミカル株匏䌚瀟 Azo compounds for anisotropic films, compositions for anisotropic films containing the compounds, and anisotropic films

Also Published As

Publication number Publication date
JPS58176261A (en) 1983-10-15

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