JP3790400B2 - Inkjet recording material - Google Patents

Description

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【化３】

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【化４】

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【化９】

【００３０】
上記化合物のインク受容層中における含有量は、０．１〜５０ミリモル／ｍ²が好ましく、０．５〜２０ミリモル／ｍ²がより好ましい。
【００３１】
本発明のインク受容層は、カチオン性化合物を含有するのが好ましい。上記化合物とカチオン性化合物を組み合わせて用いることによって、更に保存性が改良される。
【００３２】
カチオン性化合物としては、例えばカチオン性ポリマーや水溶性金属化合物が挙げられる。カチオン性ポリマーとしては、ポリエチレンイミン、ポリジアリルアミン、ポリアリルアミン、アルキルアミン重合物、特開昭５９−２０６９６号、同５９−３３１７６号、同５９−３３１７７号、同５９−１５５０８８号、同６０−１１３８９号、同６０−４９９９０号、同６０−８３８８２号、同６０−１０９８９４号、同６２−１９８４９３号、同６３−４９４７８号、同６３−１１５７８０号、同６３−２８０６８１号、特開平１−４０３７１号、同６−２３４２６８号、同７−１２５４１１号、同１０−１９３７７６号公報等に記載された１〜３級アミノ基、４級アンモニウム塩基を有するポリマーが好ましく用いられる。これらのカチオンポリマーの分子量は、５，０００以上が好ましく、更に５，０００〜１０万程度が好ましい。
【００３３】
これらのカチオン性ポリマーの使用量は無機微粒子に対して１〜１０重量％、好ましくは２〜７重量％である。
【００３４】
本発明に用いられる水溶性金属化合物として、例えば水溶性の多価金属塩が挙げられる。カルシウム、バリウム、マンガン、銅、コバルト、ニッケル、アルミニウム、鉄、亜鉛、ジルコニウム、クロム、マグネシウム、タングステン、モリブデンから選ばれる金属の水溶性塩が挙げられる。具体的には例えば、酢酸カルシウム、塩化カルシウム、ギ酸カルシウム、硫酸カルシウム、酢酸バリウム、硫酸バリウム、リン酸バリウム、塩化マンガン、酢酸マンガン、ギ酸マンガンニ水和物、硫酸マンガンアンモニウム六水和物、塩化第二銅、塩化アンモニウム銅（II）ニ水和物、硫酸銅、塩化コバルト、チオシアン酸コバルト、硫酸コバルト、硫酸ニッケル六水和物、塩化ニッケル六水和物、酢酸ニッケル四水和物、硫酸ニッケルアンモニウム六水和物、アミド硫酸ニッケル四水和物、硫酸アルミニウム、亜硫酸アルミニウム、チオ硫酸アルミニウム、ポリ塩化アルミニウム、硝酸アルミニウム九水和物、塩化アルミニウム六水和物、臭化第一鉄、塩化第一鉄、塩化第二鉄、硫酸第一鉄、硫酸第二鉄、臭化亜鉛、塩化亜鉛、硝酸亜鉛六水和物、硫酸亜鉛、酢酸ジルコニウム、塩化ジルコニウム、塩化酸化ジルコニウム八水和物、ヒドロキシ塩化ジルコニウム、酢酸クロム、硫酸クロム、硫酸マグネシウム、塩化マグネシウム六水和物、クエン酸マグネシウム九水和物、りんタングステン酸ナトリウム、クエン酸ナトリウムタングステン、12タングストりん酸n水和物、12タングストけい酸26水和物、塩化モリブデン、12モリブドりん酸n水和物等が挙げられる。
【００３５】
本発明において、特に水溶性アルミニウム化合物あるいは周期表４Ａ族元素を含む水溶性化合物が好ましい。水溶性アルミニウム化合物は、例えば無機塩としては塩化アルミニウムまたはその水和物、硫酸アルミニウムまたはその水和物、アンモニウムミョウバン等が知られている。さらに、無機系の含アルミニウムカチオンポリマーである塩基性ポリ水酸化アルミニウム化合物がある。特に、塩基性ポリ水酸化アルミニウム化合物が好ましい。
【００３６】
前記塩基性ポリ水酸化アルミニウム化合物とは、主成分が下記の一般式１、２又は３で示され、例えば［Ａｌ₆（ＯＨ）₁₅］³⁺、［Ａｌ₈（ＯＨ）₂₀］⁴⁺、［Ａｌ₁₃（ＯＨ）₃₄］⁵⁺、［Ａｌ₂₁（ＯＨ）₆₀］³⁺、等のような塩基性で高分子の多核縮合イオンを安定に含んでいる水溶性のポリ水酸化アルミニウムである。
【００３７】
［Ａｌ₂（ＯＨ）_nＣｌ_6-n］_m 式１
［Ａｌ（ＯＨ）₃］_nＡｌＣｌ₃ 式２
Ａｌ_n（ＯＨ）_mＣｌ_(3n-m) ０＜ｍ＜３ｎ 式３
【００３８】
これらのものは多木化学（株）よりポリ塩化アルミニウム（ＰＡＣ）の名で水処理剤として、浅田化学（株）よりポリ水酸化アルミニウム（Ｐａｈｏ）の名で、また、（株）理研グリーンよりピュラケムＷＴの名で、また他のメーカーからも同様の目的を持って上市されており、各種グレードの物が容易に入手できる。本発明ではこれらの市販品をそのままでも使用できるが、ｐＨが不適当に低い物もあり、その場合は適宜ｐＨを調節して用いることも可能である。
【００３９】
本発明に用いられる周期表４Ａ族元素を含む水溶性化合物は水溶性で有れば特に制限はないがチタンまたはジルコニウムを含む水溶性化合物が好ましい。例えばチタンを含む水溶性化合物としては塩化チタン、硫酸チタンが、ジルコニウムを含む水溶性化合物としては酢酸ジルコニウム、塩化ジルコニウム、オキシ塩化ジルコニウム、ヒドロキシ塩化ジルコニウム、硝酸ジルコニウム、塩基性炭酸ジルコニウム、水酸化ジルコニウム、炭酸ジルコニウム・アンモニウム、炭酸ジルコニウム・カリウム、硫酸ジルコニウム、フッ化ジルコニウム化合物等が知られている。これらの化合物はｐＨが不適当に低い物もあり、その場合は適宜ｐＨを調節して用いることも可能である。本発明に於いて、水溶性とは常温常圧下で水に１重量％以上溶解することを目安とする。
【００４０】
本発明において、上記水溶性の金属化合物のインク受容層中の含有量は、無機微粒子に対して０．１〜１０重量％が好ましく、更に好ましくは１〜５重量％である。
【００４１】
上記したカチオン性化合物は２種以上を併用することができる。例えば、カチオン性ポリマーと水溶性金属化合物を併用するのが好ましい。
【００４２】
本発明において、無機微粒子を含有するインク受容層の膜面ｐＨが２〜６であることが好ましく、特に３〜５が好ましい。上記した一般式１の化合物とこの膜面ｐＨを組み合わせることによって更に保存性が向上する。インク受容層の膜面ｐＨは、Ｊ．ＴＡＰＰＩ紙パルプ試験方法Ｎ０．４９に記載の方法に従って、蒸留水を用い、３０秒後に測定した表面ｐＨである。
【００４３】
インク受容層のｐＨは、塗布液の段階で調整するのが好ましが、塗布液のｐＨと塗布乾燥された状態での膜面ｐＨとは必ずしも一致しないため、塗布液と膜面ｐＨとの関係を予め実験等によって求めておくことが所定の膜面ｐＨにするために必要である。インク受容層塗布液のｐＨは、酸またはアルカリを適当に組み合わせて行われる。酸としては、塩酸、硝酸、硫酸、リン酸等の無機酸、酢酸、クエン酸、コハク酸等の有機酸が用いられ、アルカリとしては、水酸化ナトリウム、アンモニア水、炭酸カリウム、リン酸三ナトリウム、または弱アルカリとして、酢酸ナトリウム等の弱酸のアルカリ金属塩が用いられる。
【００４４】
本発明のインク受容層は、更に皮膜の脆弱性を改良するために各種油滴を含有することができる。そのような油滴としては室温における水に対する溶解性が０．０１重量％以下の疎水性高沸点有機溶媒（例えば、流動パラフィン、ジオクチルフタレート、トリクレジルホスフェート、シリコンオイル等）や重合体粒子（例えば、スチレン、ブチルアクリレート、ジビニルベンゼン、ブチルメタクリレート、ヒドロキシエチルメタクリレート等の重合性モノマーを一種以上重合させた粒子）を含有させることができる。そのような油滴は好ましくは親水性バインダーに対して１０〜５０重量％の範囲で用いることができる。
【００４５】
本発明において、インク受容層に界面活性剤を添加することができる。用いられる界面活性剤はアニオン系、カチオン系、ノニオン系、ベタイン系のいずれのタイプでもよく、また低分子のものでも高分子のものでもよい。１種もしくは２種以上界面活性剤をインク受理層塗液中に添加するが、２種以上の界面活性剤を組み合わせて使用する場合は、アニオン系のものとカチオン系のものとを組み合わせて用いることは好ましくない。界面活性剤の添加量はインク受容層を構成するバインダー１００ｇに対して０．００１〜５ｇが好ましく、より好ましくは０．０１〜３ｇである。
【００４６】
本発明において、インク受容層には更に、着色染料、着色顔料、インク染料の定着剤、紫外線吸収剤、酸化防止剤、顔料の分散剤、消泡剤、レベリング剤、防腐剤、蛍光増白剤、粘度安定剤、ｐＨ調節剤などの公知の各種添加剤を添加することもできる。
【００４７】
本発明に用いられる支持体としては耐水性支持体が好ましい。耐水性支持体としては、ポリエチレンテレフタレート等のポリエステル樹脂、ジアセテート樹脂、トリアセテート樹脂、アクリル樹脂、ポリカーボネート樹脂、ポリ塩化ビニル、ポリイミド樹脂、セロハン、セルロイド等のプラスチック樹脂フィルム、及び紙の両面にポリオレフィン樹脂をラミネートした樹脂被覆紙が挙げられる。本発明に用いられる耐水性支持体の厚みは、約５０〜３００μｍ程度が好ましい。
【００４８】
本発明において好ましく用いられる樹脂被覆紙を構成する原紙は、特に制限はなく、一般に用いられている紙が使用できるが、より好ましくは例えば写真用支持体に用いられているような平滑な原紙が好ましい。原紙を構成するパルプとしては天然パルプ、再生パルプ、合成パルプ等を１種もしくは２種以上混合して用いられる。この原紙には一般に製紙で用いられているサイズ剤、紙力増強剤、填料、帯電防止剤、蛍光増白剤、染料等の添加剤が配合される。
【００４９】
さらに、表面サイズ剤、表面紙力剤、蛍光増白剤、帯電防止剤、染料、アンカー剤等が表面塗布されていてもよい。
【００５０】
また、原紙の厚みに関しては特に制限はないが、紙を抄造中または抄造後カレンダー等にて圧力を印加して圧縮するなどした表面平滑性の良いものが好ましく、その坪量は３０〜２５０ｇ／ｍ²が好ましい。
【００５１】
樹脂被覆紙の樹脂としては、ポリオレフィン樹脂や電子線で硬化する樹脂を用いることができる。ポリオレフィン樹脂としては、低密度ポリエチレン、高密度ポリエチレン、ポリプロピレン、ポリブテン、ポリペンテンなどのオレフィンのホモポリマーまたはエチレン−プロピレン共重合体などのオレフィンの２つ以上からなる共重合体及びこれらの混合物であり、各種の密度、溶融粘度指数（メルトインデックス）のものを単独にあるいはそれらを混合して使用できる。
【００５２】
また、樹脂被覆紙の樹脂中には、酸化チタン、酸化亜鉛、タルク、炭酸カルシウムなどの白色顔料、ステアリン酸アミド、アラキジン酸アミドなどの脂肪酸アミド、ステアリン酸亜鉛、ステアリン酸カルシウム、ステアリン酸アルミニウム、ステアリン酸マグネシウムなどの脂肪酸金属塩、イルガノックス１０１０、イルガノックス１０７６などの酸化防止剤、コバルトブルー、群青、セシリアンブルー、フタロシアニンブルーなどのブルーの顔料や染料、コバルトバイオレット、ファストバイオレット、マンガン紫などのマゼンタの顔料や染料、蛍光増白剤、紫外線吸収剤などの各種の添加剤を適宜組み合わせて加えるのが好ましい。
【００５３】
本発明において好ましく用いられる支持体である樹脂被覆紙は、走行する原紙上にポリオレフィン樹脂の場合は、加熱溶融した樹脂を流延する、いわゆる押出コーティング法により製造され、その両面が樹脂により被覆される。また、電子線により硬化する樹脂の場合は、グラビアコーター、ブレードコーターなど一般に用いられるコーターにより樹脂を塗布した後、電子線を照射し、樹脂を硬化させて被覆する。また、樹脂を原紙に被覆する前に、原紙にコロナ放電処理、火炎処理などの活性化処理を施すことが好ましい。支持体のインク受容層が塗布される面（表面）は、その用途に応じて光沢面、マット面などを有し、特に光沢面が優位に用いられる。裏面に樹脂を被覆する必要はないが、カール防止の点から樹脂被覆したほうが好ましい。裏面は通常無光沢面であり、表面あるいは必要に応じて表裏両面にもコロナ放電処理、火炎処理などの活性処理を施すことができる。また、樹脂被覆層の厚みとしては特に制限はないが、一般に５〜５０μｍの厚味に表面または表裏両面にコーティングされる。
【００５４】
本発明における支持体には帯電防止性、搬送性、カール防止性などのために、各種のバックコート層を塗設することができる。バックコート層には無機帯電防止剤、有機帯電防止剤、親水性バインダー、ラテックス、硬化剤、顔料、界面活性剤などを適宜組み合わせて含有せしめることができる。
【００５５】
本発明において、インク受容層の塗布方法は、特に限定されず、公知の塗布方法を用いることができる。例えば、スライドリップ方式、カーテン方式、エクストルージョン方式、エアナイフ方式、ロールコーティング方式、ロッドバーコーティング方式等がある。
【００５６】
本発明において、インクジェット記録材料には、無機微粒子を含有する層に加え、さらにインク吸収層、インク定着層、中間層、保護層等を設けてもよい。例えば、下層に水溶性ポリマー層を塗設したり、上層に膨潤層を塗設しても良い。
【００５７】
【実施例】
以下、実施例により本発明を詳しく説明するが、本発明の内容は実施例に限られるものではない。なお、部とは固形分重量部を意味する。
【００５８】
実施例１
支持体として、ＬＢＫＰ（５０部）とＬＢＳＰ（５０部）のパルプ配合からなる１２０ｇ／ｍ²の基紙の表面に低密度ポリエチレン（７０部）と高密度ポリエ チレン（２０部）と酸化チタン（１０部）からなる樹脂組成物を２５ｇ／ｍ²塗 布し、裏面に高密度ポリエチレン（５０部）と低密度ポリエチレン（５０部）からなる樹脂組成物を２５ｇ／ｍ²塗布してなる樹脂被覆紙を用意した。
【００５９】
上記支持体上に、下記組成のインク受容層塗液を調整し、気相法シリカの塗布量が固形分で１８ｇ／ｍ²となるように塗布、乾燥してインクジェット記録シー トを作成した。尚、いずれの記録シートもインク受容層の膜面ｐＨが４．２になるように調整した。
【００６０】
＜記録シート１＞
気相法シリカ １００部
（平均一次粒径7nm、BET法による比表面積300m²/g）
ポリビニルアルコール ２３部
（商品名：PVA235、（株）クラレ製、ケン化度88％、平均重合度3500）
ほう酸 ４部
両性界面活性剤 ０．３部
（商品名：SWAM AM-2150、日本サーファクタント製）
【００６１】
＜記録シート２＞
上記記録シート１のポリビニルアルコールを３５部に増量した。
【００６２】
＜記録シート３＞
上記記録シート１のインク受容層に下記化１０の化合物を１０ミリモル／ｍ²加えた。
【００６３】
＜記録シート４＞
上記記録シート１のインク受容層に下記化１１の化合物を１０ミリモル／ｍ²加えた。
【００６４】
＜記録シート５＞
上記記録シート１のインク受容層に下記化１２を１０ミリモル／ｍ²加えた。
【００６５】
＜記録シート６＞
上記記録シート１のインク受容層にアスコルビン酸を１０ミリモル／ｍ²加えた。
【００６６】
＜記録シート７＞
上記記録シート１のインク受容層に本発明の化合物Ｃ１を１０ミリモル／ｍ²加えた。
【００６７】
＜記録シート８＞
上記記録シート１のインク受容層に本発明の化合物Ｃ２０を１０ミリモル／ｍ²加えた。
【００６８】
＜記録シート９＞
上記記録シート１のインク受容層に本発明の化合物Ｃ２２を１０ミリモル／ｍ²加えた。
【００６９】
＜記録シート１０＞
上記記録シート１のインク受容層に本発明の化合物Ｃ３２を１０ミリモル／ｍ²加えた。
【００７０】
＜記録シート１１＞
上記記録シート１のインク受容層に本発明の化合物Ｃ３７を１０ミリモル／ｍ²加えた。
【００７１】
＜記録シート１２＞
上記記録シート１のインク受容層に本発明の化合物Ｃ４７を１０ミリモル／ｍ²加えた。
【００７２】
【化１０】

【００７３】
【化１１】

【００７４】
【化１２】

【００７５】
得られた各々のインクジェット記録シートについて、インク吸収性、印字後の保存性（耐光性及び耐ガス性）、及び光沢度を評価した。その結果を表１に示す。
【００７６】
＜インク吸収性＞
インクジェットプリンター（セイコーエプソン社製ＰＭ−７７０Ｃ）を用いて、C,M,Yをそれぞれ１００％で印字して、印字直後にＰＰＣ用紙を印字部に重ねて軽く圧着し、ＰＰＣ用紙に転写したインク量の程度を目視で観察し、下記の基準で評価した。
○：全く転写しない。
×：転写する。
【００７７】
＜耐光性＞
インクジェットプリンター（セイコーエプソン社製ＰＭ−７７０Ｃ）を用いてＣＹＭＫのインクでそれぞれベタ印字を行い、アトラス社製サンテストＣＰＳ光退色試験機にて６００Ｗ／ｍ²で３０時間照射した後、印字部の濃度を測定し、画像残存率（照射後濃度／照射前の濃度）を求め、ＣＭＹＫ画像の内、最も残存率が低いものを表示した。
【００７８】
＜耐ガス性＞
上記耐光性試験と同様に印字後、空気中に室温で４ヶ月間曝露した後、印字部の濃度を測定し、画像残存率（曝露後濃度／曝露前の濃度）を求め、ＣＭＹＫ画像の内、最も残存率が低いものを表示した。
【００７９】
＜光沢度＞
ＪＩＳ Ｐ−８１４２（紙及び板紙の７５度鏡面光沢度試験方法）に記載の方法に従って測定した。
【００８０】
【表１】

【００８１】
光沢度は、いずれの記録シートも６０〜６５％で、高い光沢を示した。
【００８２】
上記結果から明らかなように、本発明の化合物を用いることによって、高いインク吸収性を維持しつつ保存性が改良される。即ち、水溶性バインダーであるポリビニルアルコールの量を減じることによってインク吸収性が向上するが、保存性、特に耐ガス性が著しく低下する。本発明は、インク吸収性と保存性が同時に改良され、かつフォトライクな高光沢が得られる。
【００８３】
実施例２
実施例１に用いた気相法シリカを平均一次粒径が３０ｎｍのものに代える以外は同様に試験した。その結果、インク吸収性及び保存性はほぼ同じ結果が得られたが、光沢度が５〜１０％低下した。
【００８４】
実施例３
実施例１の本発明の記録シート７〜１２に、更にカチオン性化合物として、カチオン性ポリマーのジアリルアミン塩酸塩−二酸化イオウ共重合物（日東紡（株）製、ＰＡＳ−９２）及び塩基性ポリ水酸化アルミニウム（理研グリーン株製のピュラケムWT）を３部、単独使用または併用して記録シート７Ａ〜１２Ａ、７Ｂ〜１２Ｂ及び７Ｃ〜１２Ｃを作成し、実施例１と同様に評価した。その結果を表２に示す。
【００８５】
【表２】

【００８６】
光沢度は、いずれの記録シートも６０〜６５％で、高い光沢を示した。
【００８７】
上記結果から分かるように、本発明の化合物に更にカチオン性化合物として、カチオン性ポリマーあるいは水溶性金属化合物を組み合わせて用いることによって、さらに保存性が向上する。特にカチオン性ポリマーと水溶性金属化合物を併用することによって更に保存性が向上する。
【００８８】
【発明の効果】
本発明によれば、高いインク吸収性、高光沢でかつ保存性の改良されたフォトライクなインクジェット記録材料が得られる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ink jet recording material, and more particularly to an ink jet recording material having a photo-like high gloss, excellent ink absorbability, and improved preservability after printing.
[0002]
[Prior art]
As a recording material used in the ink jet recording method, a porous ink absorbing layer made of a pigment such as amorphous silica and a water-soluble binder such as polyvinyl alcohol on a support called ordinary paper or ink jet recording paper. The recording material provided is known.
[0003]
For example, JP-A Nos. 55-51583, 56-157, 57-107879, 57-107880, 59-230787, 62-160277, 62-184879, 62-183382 And a recording material obtained by applying a silicon-containing pigment such as silica to a paper support together with an aqueous binder has been proposed.
[0004]
In addition, JP-B-3-56552, JP-A-2-188287, JP-A-10-81064, JP-A-10-119423, JP-A-10-175365, JP-A-10-193976, JP-A-10-203006, JP-A-10-217601, JP-A-11-20300, JP-A-11-20306, JP-A-11-34481, etc. disclose synthetic silica fine particles by a vapor phase method (hereinafter referred to as vapor-phase method silica). It is disclosed to use. This gas phase method silica is an ultrafine particle having an average primary particle diameter of several nm to several tens of nm, and is characterized in that high gloss is obtained. In recent years, with the demand for photo-like recording sheets, glossiness has become increasingly important. Water resistance of polyolefin resin-coated paper (polyolefin resin such as polyethylene laminated on both sides of paper) and polyester film, etc. There has been proposed a recording material in which an ink-receiving layer mainly composed of vapor-phase method silica is coated on a support.
[0005]
The paper support that has been generally used in the past has a role as an ink absorbing layer itself, but the water-resistant support such as the above-mentioned polyolefin resin-coated paper is different from the paper support. Since ink cannot be absorbed, the ink absorbability of the ink receiving layer provided on the support is important, and it is necessary to increase the void volume of the ink receiving layer. Therefore, it is necessary to reduce the ratio of the binder to the vapor phase silica in order to increase the content of the vapor phase silica and further increase the porosity.
[0006]
The recording material using the vapor phase silica as described above has a problem that the printed image is easily discolored during storage after printing. That is, discoloration due to light or discoloration due to a trace amount of gas in the atmosphere was likely to occur. In particular, discoloration due to trace gases in the atmosphere was serious. It has also been found that these problems are likely to occur when the amount of binder is reduced in order to increase ink absorbency.
[0007]
[Problems to be solved by the invention]
Accordingly, an object of the present invention is to provide an ink jet recording material having improved photolike high gloss, high ink absorbability, and storage stability.
[0008]
[Means for Solving the Problems]
The object of the present invention is to contain a gas phase method silica having an average primary particle size of 30 nm or less on a water-resistant support and a hydrophilic binder of 30% by weight or less based on the gas phase method silica. An ink-jet recording material provided with an ink-receiving layer is characterized in that the ink-receiving layer contains a compound of the following general formula 1, a cationic polymer, and a water-soluble polyvalent metal salt .
X-R-Y (general formula 1)
(Wherein X represents a hydroxyl group, mercapto group or amino group, R represents an alkylene group, and Y represents an acid group.)
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail.
The ink jet recording material of the present invention absorbs ink in the voids formed in the film by the inorganic fine particles, and it is necessary to increase the void volume in order to exhibit high ink absorbability. For this reason, it is necessary to contain a relatively large amount of inorganic fine particles, and the amount of the hydrophilic binder is preferably reduced to fill the voids.
[0010]
Examples of the inorganic fine particles used in the present invention include various fine particles such as silica and alumina, but vapor phase method silica is most preferable. The ink receiving layer, inorganic fine particles, preferably contains 8 g / m ² or more, and more preferably employed in the range of 10 to 30 g / m ^2. If it is less than this range, the ink absorbency is inferior. The amount of the hydrophilic binder is preferably 30% by weight or less, more preferably 10 to 30% by weight, based on the inorganic fine particles. By reducing the ratio of the hydrophilic binder as described above, the ink absorbability is improved, but the storage stability after printing, in particular, the gas resistance is likely to be lowered, and the present invention satisfies these performances at the same time. Features.
[0011]
In the present invention, the term “mainly containing inorganic fine particles in the ink receiving layer” means that the silica vapor phase method is 50 wt% or more, preferably 60 wt% or more, more preferably 65 wt% based on the total solid content of the ink receiving layer. % Or more.
[0012]
Synthetic silica is classified into a wet method and a gas phase method. In the present invention, it is preferable to use synthetic silica produced by a gas phase method. In general, silica fine particles often refer to wet process silica. As the wet method silica, (1) a silica sol obtained through metathesis with an acid of sodium silicate or through an ion exchange resin layer, or (2) colloidal silica obtained by heating and aging this silica sol, or (3) gelling the silica sol By changing the production conditions, silica gel in which primary particles of several microns to 10 microns are converted into three-dimensional secondary particles having siloxane bonds, and (4) silica sol, sodium silicate, sodium aluminate, etc. There are synthetic silicic acid compounds mainly composed of silicic acid, such as those obtained by heating to form a silicic acid.
[0013]
Vapor phase silica is also called a dry method as opposed to a wet method, and is generally made by a flame hydrolysis method. Specifically, a method of making silicon tetrachloride by burning with hydrogen and oxygen is generally known, but silanes such as methyltrichlorosilane and trichlorosilane can be used alone or silicon tetrachloride instead of silicon tetrachloride. Can be used in a mixed state. Vapor phase silica is commercially available from Nippon Aerosil Co., Ltd. as Aerosil, and from Tokuyama Co., Ltd. as QS type.
[0014]
The average particle size of the primary particles of the vapor phase silica used in the present invention is preferably 30 nm or less, and in order to obtain higher gloss, the specific surface area by the BET method is preferably 3 to 15 nm and 200 m ² / g or less. . More preferably, the primary particles have an average particle diameter of 3 to 10 nm and a specific surface area by the BET method of 250 m ² / g or more (preferably 250 to 500 m ² / g). The BET method referred to in the present invention is one of powder surface area measurement methods by vapor phase adsorption, and is a method for determining the total surface area, that is, the specific surface area of a 1 g sample from the adsorption isotherm. Usually, nitrogen gas is often used as the adsorbed gas, and the most frequently used method is to measure the amount of adsorption from the change in pressure or volume of the gas to be adsorbed. The most prominent expression for expressing the isotherm of multimolecular adsorption is the Brunauer, Emmett, and Teller formula, called the BET formula, which is widely used for determining the surface area. The adsorption amount is obtained based on the BET equation, and the surface area is obtained by multiplying the area occupied by one adsorbed molecule on the surface.
[0015]
In the present invention, as the hydrophilic binder used together with the inorganic fine particles, various known binders can be used, and a hydrophilic binder that is highly transparent and can obtain higher ink permeability is preferably used. When using a hydrophilic binder, it is important that the hydrophilic binder does not swell during the initial penetration of the ink and block the voids. From this point of view, a hydrophilic binder having a relatively low swellability around room temperature is preferable. Used. Particularly preferred hydrophilic binders are fully or partially saponified polyvinyl alcohol or cation-modified polyvinyl alcohol.
[0016]
Particularly preferred among the polyvinyl alcohols are those having a saponification degree of 80 or more or those having been completely saponified. Those having an average degree of polymerization of 200 to 5000 are preferred.
[0017]
The cation-modified polyvinyl alcohol has a primary to tertiary amino group or a quaternary ammonium group in the main chain or side chain of the polyvinyl alcohol as described in, for example, JP-A-61-10383. Polyvinyl alcohol.
[0018]
In the present invention, it is preferable to use a crosslinking agent (hardener) together with the hydrophilic binder. Specific examples of the crosslinking agent include aldehyde compounds such as formaldehyde and glutaraldehyde, ketone compounds such as diacetyl and chloropentanedione, bis (2-chloroethylurea) -2-hydroxy-4,6-dichloro-1, 3,5 triazine, compound having reactive halogen as described in US Pat. No. 3,288,775, divinyl sulfone, compound having reactive olefin as described in US Pat. No. 3,635,718, US Patent N-methylol compounds as described in US Pat. No. 2,732,316, isocyanates as described in US Pat. No. 3,103,437, US Pat. Nos. 3,017,280 and 2,983,611 Aziridine compounds such as these, carbodiimide compounds as described in US Pat. No. 3,100,704, Epoxy compounds as described in No. 3,091,537, halogen carboxaldehydes such as mucochloric acid, dioxane derivatives such as dihydroxydioxane, chromium alum, zirconium sulfate, boric acid and inorganic cross-linking agents such as borate, etc. Can be used alone or in combination of two or more. Among these, boric acid or borate is particularly preferable.
[0019]
The present invention remarkably improves the storage stability after printing by using a compound of the following general formula 1 in combination with inorganic fine particles, particularly gas phase method silica.
X-R-Y (general formula 1)
[0020]
In the formula, X is a hydroxyl group, an amino group (for example, an unsubstituted amino group, a secondary or tertiary amino group substituted with a lower alkyl group having 4 or less carbon atoms, and a lower alkyl group as a substituent is a sulfo group; An amino group substituted with a carboxy group, a hydroxy group, an amino group, or the like) or a mercapto group, and Y represents an acid group such as a carboxy group, a sulfo group, a hydroxy group, or a phosphonic acid group. R represents a linear, branched or cyclic alkylene group. Preferably, it is a C1-C10 thing. This alkylene group includes those having a substituent. Examples of substituents include alkenyl groups, aryl groups, heterocyclic groups, hydroxy groups, alkoxy groups, aryloxy groups, carboxy groups, amino groups, sulfo groups, phosphonic acid groups, sulfonyl groups, ureido groups, acyl groups, alkylthio groups, Substituents such as arylthio group, carbamoyl group, alphamoyl group, acylamino group, alphonamide group, halogen atom, cyano group and nitro group can be mentioned. Moreover, the acid group contained in the formula may be a salt. Specific examples are given below.
[0021]
[Chemical 1]

[0022]
[Chemical 2]

[0023]
[Chemical 3]

[0024]
[Formula 4]

[0025]
[Chemical formula 5]

[0026]
[Chemical 6]

[0027]
[Chemical 7]

[0028]
[Chemical 8]

[0029]
[Chemical 9]

[0030]
The content in the ink receiving layer of the above compound is preferably 0.1 to 50 mmol / m ^2, 0.5 to 20 mmol / m ² is more preferable.
[0031]
The ink receiving layer of the present invention preferably contains a cationic compound. Preservability is further improved by using a combination of the above compound and a cationic compound.
[0032]
Examples of the cationic compound include a cationic polymer and a water-soluble metal compound. As the cationic polymer, polyethyleneimine, polydiallylamine, polyallylamine, alkylamine polymer, JP-A-59-20696, 59-33176, 59-33177, 59-155888, 60-11389 No. 60-49990, No. 60-83882, No. 60-109894, No. 62-198493, No. 63-49478, No. 63-115780, No. 63-280681, JP-A-1-40371. No. 6-234268, No. 7-125411, No. 10-193376, and the like, and polymers having a primary to tertiary amino group and a quaternary ammonium base are preferably used. The molecular weight of these cationic polymers is preferably 5,000 or more, and more preferably about 5,000 to 100,000.
[0033]
The amount of these cationic polymers used is 1 to 10% by weight, preferably 2 to 7% by weight, based on the inorganic fine particles.
[0034]
Examples of the water-soluble metal compound used in the present invention include water-soluble polyvalent metal salts. Examples include water-soluble salts of metals selected from calcium, barium, manganese, copper, cobalt, nickel, aluminum, iron, zinc, zirconium, chromium, magnesium, tungsten, and molybdenum. Specifically, for example, calcium acetate, calcium chloride, calcium formate, calcium sulfate, barium acetate, barium sulfate, barium phosphate, manganese chloride, manganese acetate, manganese formate dihydrate, manganese ammonium sulfate hexahydrate, chloride chloride Dicopper, ammonium copper (II) chloride dihydrate, copper sulfate, cobalt chloride, cobalt thiocyanate, cobalt sulfate, nickel sulfate hexahydrate, nickel chloride hexahydrate, nickel acetate tetrahydrate, nickel sulfate Ammonium hexahydrate, nickel amidosulfate tetrahydrate, aluminum sulfate, aluminum sulfite, aluminum thiosulfate, polyaluminum chloride, aluminum nitrate nonahydrate, aluminum chloride hexahydrate, ferrous bromide, ferric chloride Ferrous, ferric chloride, ferrous sulfate, ferric sulfate, zinc bromide, zinc chloride, zinc nitrate six Japanese, Zinc sulfate, Zirconium acetate, Zirconium chloride, Zirconium chloride octahydrate, Hydroxy zirconium chloride, Chromium acetate, Chromium sulfate, Magnesium sulfate, Magnesium chloride hexahydrate, Magnesium citrate nonahydrate, Phosphorus tungsten Sodium tungstate, sodium tungsten citrate, 12 tungstophosphoric acid n hydrate, 12 tungstosilicic acid 26 hydrate, molybdenum chloride, 12 molybdophosphoric acid n hydrate, and the like.
[0035]
In the present invention, a water-soluble aluminum compound or a water-soluble compound containing a Group 4A element of the periodic table is particularly preferable. As the water-soluble aluminum compound, for example, aluminum chloride or its hydrate, aluminum sulfate or its hydrate, ammonium alum and the like are known as inorganic salts. Furthermore, there is a basic polyaluminum hydroxide compound which is an inorganic aluminum-containing cationic polymer. In particular, a basic polyaluminum hydroxide compound is preferable.
[0036]
The basic polyaluminum hydroxide compound has a main component represented by the following general formula 1, 2 or 3, for example, [Al ₆ (OH) ₁₅ ] ³⁺ , [Al ₈ (OH) ₂₀ ] ⁴⁺ , It is a water-soluble polyaluminum hydroxide containing a basic and high-molecular polynuclear condensed ion stably such as [Al ₁₃ (OH) ₃₄ ] ⁵⁺ , [Al ₂₁ (OH) ₆₀ ] ³⁺ , etc. .
[0037]
[Al ₂ (OH) _n Cl _6-n ] _m Formula 1
[Al (OH) ₃ ] _n AlCl ₃ Formula 2
Al _n (OH) _m Cl _(3n-m) 0 <m <3n Formula 3
[0038]
These are water treatment agents from Taki Chemical Co., Ltd. under the name of polyaluminum chloride (PAC), from Asada Chemical Co., Ltd. under the name of polyaluminum hydroxide (Paho), and from Riken Green Co., Ltd. It is marketed under the name of Purachem WT and from other manufacturers for the same purpose, and various grades can be easily obtained. In the present invention, these commercially available products can be used as they are, but there are also products having an inappropriately low pH, and in that case, the pH can be appropriately adjusted and used.
[0039]
The water-soluble compound containing a Group 4A element of the periodic table used in the present invention is not particularly limited as long as it is water-soluble, but a water-soluble compound containing titanium or zirconium is preferable. For example, water-soluble compounds containing titanium include titanium chloride and titanium sulfate, and water-soluble compounds containing zirconium include zirconium acetate, zirconium chloride, zirconium oxychloride, hydroxy zirconium chloride, zirconium nitrate, basic zirconium carbonate, zirconium hydroxide, Zirconium carbonate / ammonium, zirconium carbonate / potassium, zirconium sulfate, zirconium fluoride compounds and the like are known. Some of these compounds have an inappropriately low pH. In that case, the pH can be appropriately adjusted and used. In the present invention, the term “water-soluble” means that it is soluble in water at 1% by weight or more under normal temperature and pressure.
[0040]
In the present invention, the content of the water-soluble metal compound in the ink receiving layer is preferably from 0.1 to 10% by weight, more preferably from 1 to 5% by weight, based on the inorganic fine particles.
[0041]
Two or more of the above cationic compounds can be used in combination. For example, it is preferable to use a cationic polymer and a water-soluble metal compound in combination.
[0042]
In the present invention, the film surface pH of the ink receiving layer containing inorganic fine particles is preferably 2 to 6, particularly 3 to 5. Preservability is further improved by combining the above-mentioned compound of the general formula 1 and this membrane surface pH. The film surface pH of the ink receiving layer is determined according to J.I. Surface pH measured after 30 seconds using distilled water according to the method described in TAPPI paper pulp test method N0.49.
[0043]
The pH of the ink receiving layer is preferably adjusted at the coating liquid stage, but the pH of the coating liquid does not necessarily match the film surface pH in the coated and dried state. It is necessary to obtain the relationship in advance by experiments or the like in order to obtain a predetermined film surface pH. The pH of the ink receiving layer coating solution is determined by appropriately combining acid or alkali. As the acid, inorganic acids such as hydrochloric acid, nitric acid, sulfuric acid and phosphoric acid, and organic acids such as acetic acid, citric acid and succinic acid are used. As the alkali, sodium hydroxide, aqueous ammonia, potassium carbonate and trisodium phosphate are used. Alternatively, an alkali metal salt of a weak acid such as sodium acetate is used as the weak alkali.
[0044]
The ink receiving layer of the present invention can further contain various oil droplets in order to improve the brittleness of the film. Such oil droplets include hydrophobic high-boiling organic solvents (for example, liquid paraffin, dioctyl phthalate, tricresyl phosphate, silicone oil, etc.) having a solubility in water at room temperature of 0.01% by weight or less, and polymer particles ( For example, particles obtained by polymerizing one or more polymerizable monomers such as styrene, butyl acrylate, divinylbenzene, butyl methacrylate, and hydroxyethyl methacrylate) can be contained. Such oil droplets can be preferably used in the range of 10 to 50% by weight based on the hydrophilic binder.
[0045]
In the present invention, a surfactant can be added to the ink receiving layer. The surfactant used may be any of anionic, cationic, nonionic, and betaine types, and may be a low-molecular or high-molecular one. One or more surfactants are added to the ink-receiving layer coating liquid. When two or more surfactants are used in combination, an anionic one and a cationic one are used in combination. That is not preferable. The addition amount of the surfactant is preferably 0.001 to 5 g, more preferably 0.01 to 3 g with respect to 100 g of the binder constituting the ink receiving layer.
[0046]
In the present invention, the ink receiving layer further comprises a coloring dye, a coloring pigment, an ink dye fixing agent, an ultraviolet absorber, an antioxidant, a pigment dispersant, an antifoaming agent, a leveling agent, an antiseptic, and a fluorescent brightening agent. Various known additives such as viscosity stabilizers and pH adjusters can also be added.
[0047]
The support used in the present invention is preferably a water resistant support. Water-resistant supports include polyester resins such as polyethylene terephthalate, diacetate resins, triacetate resins, acrylic resins, polycarbonate resins, polyvinyl chloride, polyimide resins, cellophane, cellulosic plastic resin films, and polyolefin resins on both sides of paper. And resin-coated paper laminated. The thickness of the water-resistant support used in the present invention is preferably about 50 to 300 μm.
[0048]
The base paper constituting the resin-coated paper preferably used in the present invention is not particularly limited, and generally used paper can be used. More preferably, for example, a smooth base paper used for a photographic support is used. preferable. As the pulp constituting the base paper, natural pulp, recycled pulp, synthetic pulp or the like is used alone or in combination of two or more. This base paper is blended with additives such as sizing agent, paper strength enhancer, filler, antistatic agent, fluorescent whitening agent, and dye generally used in papermaking.
[0049]
Further, a surface sizing agent, surface paper strengthening agent, fluorescent brightening agent, antistatic agent, dye, anchor agent and the like may be applied on the surface.
[0050]
In addition, the thickness of the base paper is not particularly limited, but preferably has a good surface smoothness such as a paper that is compressed by applying a pressure during or after paper making using a calendar or the like, and has a basis weight of 30 to 250 g / m ² is preferred.
[0051]
As the resin of the resin-coated paper, a polyolefin resin or a resin curable with an electron beam can be used. Examples of polyolefin resins include low-density polyethylene, high-density polyethylene, polypropylene, polybutene, olefin homopolymers such as polypentene, or copolymers composed of two or more olefins such as ethylene-propylene copolymer, and mixtures thereof. Those having various densities and melt viscosity indices (melt index) can be used alone or in combination.
[0052]
In addition, in the resin of the resin-coated paper, white pigments such as titanium oxide, zinc oxide, talc and calcium carbonate, fatty acid amides such as stearic acid amide and arachidic acid amide, zinc stearate, calcium stearate, aluminum stearate, stearin Fatty acid metal salts such as magnesium acid, antioxidants such as Irganox 1010 and Irganox 1076, blue pigments and dyes such as cobalt blue, ultramarine blue, cecilian blue and phthalocyanine blue, magenta such as cobalt violet, fast violet and manganese purple It is preferable to add various additives such as pigments and dyes, fluorescent brighteners and ultraviolet absorbers in appropriate combinations.
[0053]
In the case of a polyolefin resin on a traveling base paper, the resin-coated paper that is preferably used in the present invention is produced by a so-called extrusion coating method in which a heat-melted resin is cast, and both surfaces thereof are coated with the resin. The In the case of a resin that is cured by an electron beam, the resin is applied by a commonly used coater such as a gravure coater or a blade coater, and then irradiated with an electron beam to cure and coat the resin. Moreover, it is preferable to subject the base paper to an activation treatment such as corona discharge treatment or flame treatment before coating the resin on the base paper. The surface (surface) on which the ink receiving layer of the support is applied has a glossy surface, a matte surface, etc., depending on the application, and the glossy surface is particularly preferentially used. It is not necessary to coat the back surface with a resin, but it is preferable to coat the resin from the viewpoint of curling prevention. The back surface is usually a matte surface, and an active treatment such as corona discharge treatment or flame treatment can be applied to the front surface or both the front and back surfaces as necessary. Moreover, there is no restriction | limiting in particular as thickness of a resin coating layer, Generally, it coats on the surface or both surfaces by thickness of 5-50 micrometers.
[0054]
Various back coat layers can be coated on the support in the present invention for antistatic properties, transport properties, anticurling properties, and the like. The backcoat layer can contain an inorganic antistatic agent, an organic antistatic agent, a hydrophilic binder, latex, a curing agent, a pigment, a surfactant, and the like in appropriate combination.
[0055]
In the present invention, the coating method of the ink receiving layer is not particularly limited, and a known coating method can be used. For example, there are a slide lip method, a curtain method, an extrusion method, an air knife method, a roll coating method, a rod bar coating method, and the like.
[0056]
In the present invention, the ink jet recording material may be further provided with an ink absorbing layer, an ink fixing layer, an intermediate layer, a protective layer and the like in addition to the layer containing inorganic fine particles. For example, a water-soluble polymer layer may be coated on the lower layer, or a swelling layer may be coated on the upper layer.
[0057]
【Example】
EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, the content of this invention is not restricted to an Example. In addition, a part means a solid content weight part.
[0058]
Example 1
As a support, low-density polyethylene (70 parts), high-density polyethylene (20 parts) and titanium oxide (20 parts) were formed on the surface of a 120 g / m ² base paper composed of LBKP (50 parts) and LBSP (50 parts). the resin composition consisting of 10 parts) 25 g / m ² coating and fabric back surface high-density polyethylene (50 parts) and a resin composition comprising a low density polyethylene (50 parts) formed by 25 g / m ² coating resin coating Paper was prepared.
[0059]
On the support, an ink-receiving layer coating solution having the following composition was prepared, and coated and dried so that the coating amount of the vapor phase method silica was 18 g / m ^{2 in} solid content, to prepare an ink jet recording sheet. Each recording sheet was adjusted so that the film surface pH of the ink receiving layer was 4.2.
[0060]
<Recording sheet 1>
100 parts of fumed silica (average primary particle size 7 nm, specific surface area by the BET method: 300m ² / g)
23 parts of polyvinyl alcohol (trade name: PVA235, manufactured by Kuraray Co., Ltd., saponification degree 88%, average polymerization degree 3500)
Boric acid 4 parts amphoteric surfactant 0.3 parts (trade name: SWAM AM-2150, manufactured by Nippon Surfactant)
[0061]
<Recording sheet 2>
The amount of polyvinyl alcohol in the recording sheet 1 was increased to 35 parts.
[0062]
<Recording sheet 3>
10 mmol / m ² of the following chemical formula 10 was added to the ink receiving layer of the recording sheet 1.
[0063]
<Recording sheet 4>
10 mmol / m ² of the following chemical compound 11 was added to the ink receiving layer of the recording sheet 1.
[0064]
<Recording sheet 5>
The following chemical formula 12 was added to the ink receiving layer of the recording sheet 1 at 10 mmol / m ² .
[0065]
<Recording sheet 6>
Ascorbic acid was added to the ink receiving layer of the recording sheet 1 at 10 mmol / m ² .
[0066]
<Recording sheet 7>
The compound C1 of the present invention was added to the ink receiving layer of the recording sheet 1 at 10 mmol / m ² .
[0067]
<Recording sheet 8>
10 mmol / m ² of the compound C20 of the present invention was added to the ink receiving layer of the recording sheet 1.
[0068]
<Recording sheet 9>
10 mmol / m ² of the compound C22 of the present invention was added to the ink receiving layer of the recording sheet 1.
[0069]
<Recording sheet 10>
The compound C32 of the present invention was added to the ink receiving layer of the recording sheet 1 at 10 mmol / m ² .
[0070]
<Recording sheet 11>
10 mmol / m ² of the compound C37 of the present invention was added to the ink receiving layer of the recording sheet 1.
[0071]
<Recording sheet 12>
10 mmol / m ² of the compound C47 of the present invention was added to the ink receiving layer of the recording sheet 1.
[0072]
[Chemical Formula 10]

[0073]
Embedded image

[0074]
Embedded image

[0075]
About each obtained inkjet recording sheet, ink absorptivity, the preservability after printing (light resistance and gas resistance), and glossiness were evaluated. The results are shown in Table 1.
[0076]
<Ink absorbability>
Using an inkjet printer (Seiko Epson's PM-770C), C, M, and Y were printed at 100%, and immediately after printing, the PPC paper was layered on the print section and lightly pressed and transferred to the PPC paper. The amount was visually observed and evaluated according to the following criteria.
○: Not transferred at all.
X: Transferred.
[0077]
<Light resistance>
Solid printing was performed with CYMK ink using an inkjet printer (Seiko Epson's PM-770C), and irradiation was performed at 600 W / m ² for 30 hours with an Atlas Suntest CPS photobleaching tester. The density was measured to determine the image residual ratio (post-irradiation density / pre-irradiation density), and the CMYK image having the lowest residual ratio was displayed.
[0078]
<Gas resistance>
Similar to the above light fastness test, after printing, after exposure in the air at room temperature for 4 months, the density of the printed part is measured to determine the residual ratio of the image (density after exposure / density before exposure). The one with the lowest survival rate was displayed.
[0079]
<Glossiness>
It was measured according to the method described in JIS P-8142 (75-degree specular gloss test method for paper and paperboard).
[0080]
[Table 1]

[0081]
The glossiness of each recording sheet was 60 to 65%, indicating a high glossiness.
[0082]
As is apparent from the above results, the use of the compound of the present invention improves storage stability while maintaining high ink absorbability. That is, by reducing the amount of polyvinyl alcohol, which is a water-soluble binder, ink absorbability is improved, but storage stability, particularly gas resistance, is significantly reduced. In the present invention, ink absorbability and storage stability are improved at the same time, and a photo-like high gloss is obtained.
[0083]
Example 2
The same test was conducted except that the vapor phase silica used in Example 1 was replaced with one having an average primary particle size of 30 nm. As a result, ink absorbability and storage stability were almost the same, but the glossiness decreased by 5 to 10%.
[0084]
Example 3
In addition to the recording sheets 7 to 12 of the present invention of Example 1, a cationic polymer diallylamine hydrochloride-sulfur dioxide copolymer (manufactured by Nittobo Co., Ltd., PAS-92) and basic polywater as cationic compounds. Recording sheets 7A to 12A, 7B to 12B, and 7C to 12C were prepared by using 3 parts of aluminum oxide (Purachem WT manufactured by Riken Green Co., Ltd.) alone or in combination, and evaluated in the same manner as in Example 1. The results are shown in Table 2.
[0085]
[Table 2]

[0086]
The glossiness of each recording sheet was 60 to 65%, indicating a high glossiness.
[0087]
As can be seen from the above results, the preservability is further improved by using the compound of the present invention in combination with a cationic polymer or a water-soluble metal compound as a cationic compound. In particular, preservability is further improved by using a cationic polymer and a water-soluble metal compound in combination.
[0088]
【The invention's effect】
According to the present invention, a photo-like ink jet recording material having high ink absorptivity, high gloss, and improved storage stability can be obtained.

Claims (1)

An ink-receiving layer containing vapor phase silica having an average primary particle size of 30 nm or less and a hydrophilic binder of 30% by weight or less based on the vapor phase silica was provided on a water-resistant support . An ink jet recording material, wherein the ink receiving layer contains a compound of the following general formula 1, a cationic polymer, and a water-soluble polyvalent metal salt .
X-R-Y (general formula 1)
(Wherein X represents a hydroxyl group, mercapto group or amino group, R represents an alkylene group, and Y represents an acid group.)