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支持体上に、無機微粒子とカチオンポリマーとバインダーとを含むインク受容層が形成されたインクジェット記録用シートにおいて、該インク受容層が、ヒンダードアミン系化合物とジヒドラジド化合物とを含有することを特徴とするインクジェット記録用シート。
An ink jet recording sheet in which an ink receiving layer containing inorganic fine particles, a cationic polymer and a binder is formed on a support, wherein the ink receiving layer contains a hindered amine compound and a dihydrazide compound. Recording sheet.
ヒンダードアミン系化合物が、下記一般式(１)で表される請求項１に記載のインクジェット記録用シート。
〔式中、Ｒ１、Ｒ２はそれぞれ独立に水素原子、水酸基、オキシル基、炭素数１〜１８のアルキル基、炭素数１〜１８のアルコキシ基、アリル基、アセチル基、ベンジル基またはベンジルオキシ基のいずれかを表す。Ｒ３は炭化水素残基を表し、Ｒ４は水素原子、または炭素数１〜１８のアルキル基を表す。ｌ、ｍは０≦ｌ＋ｍ≦３を満たす整数である。〕
The inkjet recording sheet according to claim 1, wherein the hindered amine compound is represented by the following general formula (1).
[Wherein R 1 and R 2 are each independently a hydrogen atom, a hydroxyl group, an oxyl group, an alkyl group having 1 to 18 carbon atoms, an alkoxy group having 1 to 18 carbon atoms, an allyl group, an acetyl group, a benzyl group, or benzyloxy. Represents any of the groups. R 3 represents a hydrocarbon residue, and R 4 represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms. l and m are integers satisfying 0 ≦ l + m ≦ 3. ]
ヒンダードアミン系化合物が、下記一般式（２）で表される少なくとも１種の構成単位（ａ１）と、下記一般式（３）および／または（４）で表される少なくとも１種の構成単位（ａ２）とを含むポリマー（Ａ）である請求項１に記載のインクジェット記録用シート。
〔式中、Ｒ５、Ｒ６、Ｒ１０、Ｒ１１、Ｒ１６、Ｒ１７はそれぞれ独立に水素原子または炭素数１〜８のアルキル基を表し、Ｒ７〜Ｒ９はそれぞれ独立に炭素数１〜８のアルキル基を表し、Ｘは酸残基を、ｎは１〜６の整数を表す。また、Ｒ１２、Ｒ１３はそれぞれ独立に酸素原子またはＮ−Ｒ１８を表す。ここでＲ１８は水素原子または炭素数１〜８のアルキル基を表す。また、Ｒ１４、Ｒ１５はそれぞれ独立に水素原子または炭素数１〜８のアルキル基を表す。〕
The hindered amine compound comprises at least one structural unit (a1) represented by the following general formula (2) and at least one structural unit (a2 represented by the following general formula (3) and / or (4): The ink jet recording sheet according to claim 1, wherein the polymer is a polymer (A).
[Wherein R 5 , R 6 , R 10 , R 11 , R 16 , R 17 each independently represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, and R 7 to R 9 each independently represent carbon number. 1 to 8 alkyl groups are represented, X represents an acid residue, and n represents an integer of 1 to 6. R 12 and R 13 each independently represents an oxygen atom or N—R 18 . Here, R 18 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. R 14 and R 15 each independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. ]
前記構成単位（ａ２）が下記一般式（５）で表される請求項３に記載のインクジェット記録用シート。
〔式中、Ｒ２２、Ｒ２３はそれぞれ独立に水素原子またはメチル基を表す。また、Ｒ１９〜Ｒ２１はそれぞれ独立に炭素数１〜３のアルキル基を表し、Ｘは酸残基を表す。〕
The inkjet recording sheet according to claim 3, wherein the structural unit (a2) is represented by the following general formula (5).
[Wherein, R 22 and R 23 each independently represents a hydrogen atom or a methyl group. R 19 to R 21 each independently represents an alkyl group having 1 to 3 carbon atoms, and X represents an acid residue. ]
ジヒドラジド化合物が、下記一般式（６）で表される請求項１〜４のいずれかに記載のインクジェット記録用シート。
〔式中、Ｒ２５、Ｒ２６はそれぞれ独立に水素原子または炭素数１〜４のアルキル基を表す。Ｒ２７、Ｒ２８はそれぞれ独立に水素原子またはメチル基を表す。〕
The inkjet recording sheet according to any one of claims 1 to 4, wherein the dihydrazide compound is represented by the following general formula (6).
[Wherein, R 24 represents a direct bond, a saturated or unsaturated alkylene group having 1 to 12 carbon atoms, a phenylene group, or a substituent represented by the general formula (7). ]
[Wherein, R 25 and R 26 each independently represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. R 27 and R 28 each independently represents a hydrogen atom or a methyl group. ]
一般式（６）のＲ2４が、一般式（７）である請求項５に記載のインクジェット用記録シート。
The inkjet recording sheet according to claim 5, wherein R 24 in the general formula (6) is the general formula (7).
一般式（６）で表されるジヒドラジド化合物が、１，３−ビス（ヒドラジノカルボニルエチル）−５−イソプロルヒダントインである請求項６に記載のインクジェット記録用シート。
The sheet for inkjet recording according to claim 6, wherein the dihydrazide compound represented by the general formula (6) is 1,3-bis (hydrazinocarbonylethyl) -5-isopropyl hydantoin.
