JP2008523167A - Pigment composition in the form of an aqueous dispersion - Google Patents
Pigment composition in the form of an aqueous dispersion Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D17/00—Pigment pastes, e.g. for mixing in paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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Abstract
本発明は、（ａ）合成非晶質シリカ又はアルミノケイ酸塩の顔料粒子；（ｂ）少なくとも１つの水溶性アルミニウム塩；及び（ｃ）約２０００〜約１００００００の分子量と約０．２〜約１２meq/gの電荷密度を有する少なくとも１つのカチオン性ポリマーを含む、水性分散液の形態の顔料組成物に関する。本発明は、更に、その製造方法、その使用方法、紙又は板紙の被覆方法、及びその方法により得られる紙又は板紙に関する。 The present invention provides (a) synthetic amorphous silica or aluminosilicate pigment particles; (b) at least one water-soluble aluminum salt; and (c) a molecular weight of about 2000 to about 1000000 and about 0.2 to about 12 meq. relates to a pigment composition in the form of an aqueous dispersion comprising at least one cationic polymer having a charge density of / g. The present invention further relates to a method for producing the same, a method for using the same, a method for coating paper or paperboard, and a paper or paperboard obtained by the method.
Description
本発明は、顔料組成物、その製造方法、その使用方法、紙又は板紙の被覆方法、及びその方法により得られる紙又は板紙に関する。 The present invention relates to a pigment composition, a production method thereof, a use method thereof, a paper or paperboard coating method, and a paper or paperboard obtained by the method.
インクジェットプリンタの開発は、その目的に適切な紙の需要をもたらした。特に、製造するのが容易であるが、依然として高品質のインクジェット印刷を可能にする紙への需要が存在する。 The development of inkjet printers has resulted in demand for paper that is appropriate for that purpose. In particular, there is a need for paper that is easy to manufacture but still allows high quality ink jet printing.
インクジェット印刷に適切な紙を製造するために、多様な種類の被覆物を使用することが開示されてきた。 It has been disclosed to use various types of coatings to produce paper suitable for ink jet printing.
特許文献１は、水溶性金属塩を、顔料及び従来の結合剤を含むインク受容層に組み込むことを開示する。 U.S. Patent No. 6,057,031 discloses incorporating a water soluble metal salt into an ink receiving layer comprising a pigment and a conventional binder.
特許文献２は、水溶性多価金属とカチオン性ポリマーとの組み合わせを含む記録表面を開示する。 Patent Document 2 discloses a recording surface containing a combination of a water-soluble polyvalent metal and a cationic polymer.
特許文献３は、水溶性多価金属塩で表面処理されている顔料を開示する。 Patent Document 3 discloses a pigment that has been surface-treated with a water-soluble polyvalent metal salt.
特許文献４は、インクジェット記録材料の調製方法であって、５００nm以下の平均二次粒径を有するシリカ粒子を含有する少なくとも１つの多孔質層を形成する工程、及び被覆無機粒子の固形分が多孔質層上で０．３３g/m2以下になるように無機粒子含有層を調製するために、被覆溶液を被覆する工程、を含む方法を開示する。 Patent Document 4 is a method for preparing an inkjet recording material, in which a step of forming at least one porous layer containing silica particles having an average secondary particle size of 500 nm or less and a solid content of the coated inorganic particles are porous. Disclosed is a method including the step of coating a coating solution to prepare an inorganic particle-containing layer so as to be 0.33 g / m 2 or less on the porous layer.
特許文献５は、原紙及びその上の被覆物を含むインクジェット紙を開示し、ここで前記被覆物は、正電荷を帯びた錯体及び結合剤により変性されている無機顔料を含有する。この正電荷を帯びた錯体は、多価金属イオン及び無機リガンドを含有する。 U.S. Pat. No. 6,089,077 discloses an ink jet paper comprising a base paper and a coating thereon, wherein the coating contains an inorganic pigment that has been modified with a positively charged complex and a binder. This positively charged complex contains a polyvalent metal ion and an inorganic ligand.
特許文献６は、基材を含み、結合剤と、非晶質シリカ粒子を分散し、強い機械的応力を適用して粒子を***することにより形成された複数の粒子とを含む透明インク受容層を含む、インクジェット記録材料を開示する。 Patent Document 6 discloses a transparent ink receiving layer including a base material, and a binder, and a plurality of particles formed by dispersing amorphous silica particles and applying strong mechanical stress to break up the particles. An ink jet recording material is disclosed.
被覆紙に関する開示の他の例は、特許文献７、特許文献８、特許文献９、特許文献１０、特許文献１１、特許文献１２及び特許文献１３である。
本発明の目的は、インクジェット印刷用に紙又は板紙を被覆するために適切であり、製造することが簡単である顔料組成物を提供することである。 The object of the present invention is to provide a pigment composition which is suitable for coating paper or paperboard for ink jet printing and which is simple to manufacture.
本発明の別の目的は、インクジェット印刷に適するように、紙又は板紙の表面に塗布することが簡単である被覆配合物を提供することである。 Another object of the present invention is to provide a coating formulation that is simple to apply to the surface of paper or paperboard to be suitable for ink jet printing.
本発明のさらに別の目的は、インクジェット印刷に適切であり、製造することが簡単である紙又は板紙を提供することである。 Yet another object of the present invention is to provide a paper or paperboard that is suitable for inkjet printing and is simple to manufacture.
これらの目的は、新規の顔料組成物によって達成できることが見出された。したがって、本発明の一つの態様は、
（ａ）合成非晶質シリカ又はアルミノケイ酸塩の顔料粒子と、
（ｂ）少なくとも１つの水溶性アルミニウム塩と、
（ｃ）約２０００〜約１００００００の分子量及び約０．２〜約１２meq/gの電荷密度を有する少なくとも１つのカチオン性ポリマーと
を含む、水性分散液の形態の顔料組成物に関する。
It has been found that these objectives can be achieved by the novel pigment composition. Accordingly, one aspect of the present invention is
(A) synthetic amorphous silica or aluminosilicate pigment particles;
(B) at least one water-soluble aluminum salt;
(C) relates to a pigment composition in the form of an aqueous dispersion comprising a molecular weight of about 2000 to about 1000000 and at least one cationic polymer having a charge density of about 0.2 to about 12 meq / g.
前記合成非晶質シリカ又はケイ酸塩の顔料粒子は、好ましくは約０．００５μm〜約２５μm、より好ましくは約０．００７μm〜約１５μm、最も好ましくは約０．０１μm〜約１０μmの平均直径を有する。これらの粒子は、好ましくは約３０m2/g〜約６００m2/g、より好ましくは約３０〜４５０m2/g、最も好ましくは約４０m2/g〜約４００m2/g、特に最も好ましくは約５０m2/g〜約３００m2/gの表面積を有する。前記組成物中の顔料粒子の実効表面電荷は、好ましくは正であり、したがって、この分散液は、主にカチオン性であると考えられる。 The synthetic amorphous silica or silicate pigment particles preferably have an average diameter of about 0.005 μm to about 25 μm, more preferably about 0.007 μm to about 15 μm, and most preferably about 0.01 μm to about 10 μm. Have. These particles, preferably from about 30 m 2 / g to about 600 meters 2 / g, more preferably from about 30~450m 2 / g, most preferably from about 40 m 2 / g to about 400 meters 2 / g, particularly most preferably from about having a surface area of 50m 2 / g~ about 300m 2 / g. The effective surface charge of the pigment particles in the composition is preferably positive and therefore this dispersion is considered to be predominantly cationic.
本明細書で使用されるとき、直径という用語は球形の直径と同等であることを意味する。 As used herein, the term diameter means equivalent to a spherical diameter.
前記合成非晶質シリカ又はアルミノケイ酸塩の顔料粒子は、例えば、沈降シリカ、ゲル型シリカ、ヒュームドシリカ、シリカ、アルミノケイ酸塩若しくはこれらの混合物のコロイド一次粒子、又はシリカ、アルミノケイ酸塩若しくはこれらの混合物のコロイド一次粒子の水性ゾル中での凝集により形成される多孔質凝集体、又は上記の種類の粒子の１つ以上の混合物であることができる。 The synthetic amorphous silica or aluminosilicate pigment particles include, for example, colloidal primary particles of precipitated silica, gel silica, fumed silica, silica, aluminosilicate, or a mixture thereof, or silica, aluminosilicate, or these. Can be a porous aggregate formed by agglomeration of colloidal primary particles in an aqueous sol, or a mixture of one or more of the above types of particles.
沈降シリカは、水性媒体中の最終的なシリカ粒子が粗凝集体として凝固し、それを回収し、洗浄し、乾燥したときに形成されるシリカを意味する。沈降シリカは、例えば、商標名Tixosil（商標）で市販されている。 By precipitated silica is meant the silica that is formed when the final silica particles in the aqueous medium solidify as coarse aggregates, which are collected, washed and dried. Precipitated silica is commercially available, for example, under the trade name Tixosil ™.
ゲル型シリカは、シリカゲルから形成される粒子を意味する（通常、コロイドシリカの隣接粒子の凝集性で硬質の三次元網状組織として記載される）。ゲル型シリカは、例えば、商標名Sylojet（商標）で市販されている。 Gel-type silica refers to particles formed from silica gel (usually described as a coherent and hard three-dimensional network of colloidal silica adjacent particles). Gel-type silica is commercially available, for example, under the trade name Sylojet ™.
ヒュームドシリカは、火炎加水分解法により調製されるシリカを意味する。ヒュームドシリカは、例えば、商標名Cabosil（商標）及びAerosil（商標）で市販されている。 Fumed silica means silica prepared by a flame hydrolysis method. Fumed silica is commercially available, for example, under the trade names Cabosil ™ and Aerosil ™.
シリカ又はアルミノケイ酸塩のコロイド一次粒子は、好ましくはアルカリ金属ケイ酸塩の水溶液から形成され、ここで、アルカリ金属イオンはイオン交換法を通して除去されるか、又はアルカリ金属ケイ酸塩溶液のｐＨは酸の添加により低減される。イオン交換に基づく方法は、R.K. IIer, "The Chemistry of Silica" 1979, pages 333-334に記載された基本原理、及びシリカ又はアルミノケイ酸塩の負若しくは正電荷を帯びたコロイド粒子を含む水性ゾル中での結果に従う。アルカリ金属ケイ酸塩のｐＨ低減に基づく方法は、例えば、米国特許第５，１７６，８９１号、同第５，６４８，０５５号、同第５，８５３，６１６号、同第５，４８２，６９３号、同第６，０６０，５２３号及び同第６，２７４，１１２号に記載された基本原理に従う。 The colloidal primary particles of silica or aluminosilicate are preferably formed from an aqueous solution of an alkali metal silicate, where alkali metal ions are removed through an ion exchange process, or the pH of the alkali metal silicate solution is Reduced by addition of acid. The method based on ion exchange is based on the basic principle described in RK IIer, “The Chemistry of Silica” 1979, pages 333-334, and in aqueous sols containing negative or positively charged colloidal particles of silica or aluminosilicate. Follow the results in Methods based on alkali metal silicate pH reduction include, for example, US Pat. Nos. 5,176,891, 5,648,055, 5,853,616, and 5,482,693. No. 6,060,523 and 6,274,112.
特に好ましいゾルは、例えばアルミニウム、チタン、クロム、ジルコニウム、ホウ素又は他の任意の適切な金属の酸化物のような金属酸化物により、表面が変性されていても、いなくてもよい、シリカのコロイド一次粒子を含む。 Particularly preferred sols are silica, which may or may not be surface modified with a metal oxide such as, for example, aluminum, titanium, chromium, zirconium, boron or any other suitable metal oxide. Contains colloidal primary particles.
前記一次粒子の表面積は、約３０m2/g〜約６００m2/g、より好ましくは約３０〜４５０m2/g、最も好ましくは約４０m2/g〜約４００m2/g、特に最も好ましくは約５０m2/g〜約３００m2/gである。この一次粒子の水性ゾルの乾燥含有量は、好ましくは約０．５重量％〜約６０重量％、最も好ましくは約１重量％〜約５０重量％である。 Surface area of the primary particles is about 30 m 2 / g to about 600 meters 2 / g, more preferably from about 30~450m 2 / g, most preferably from about 40 m 2 / g to about 400 meters 2 / g, particularly most preferably from about is a 50m 2 / g~ about 300m 2 / g. The dry content of the primary particle aqueous sol is preferably from about 0.5 wt% to about 60 wt%, most preferably from about 1 wt% to about 50 wt%.
シリカ又はアルミノケイ酸塩のコロイド一次粒子の適切な水性ゾルは、例えば、商標名Ludox（商標）、Snowtex（商標）、Bindzil（商標）、Nyacol（商標）、Vinnsil（商標）又はFennosil（商標）で市販されている。 Suitable aqueous sols of colloidal primary particles of silica or aluminosilicate are, for example, trade names Ludox ™, Snowtex ™, Bindzil ™, Nyacol ™, Vinnsil ™ or Fennosil ™ It is commercially available.
例えば沈降シリカ、ゲル型シリカ又はヒュームドシリカの粉末を分散して形成されたゾルとは異なり、イオン交換又はｐＨ低減によりアルカリ金属ケイ酸塩から調製されたゾル中のコロイド粒子は、例えば沈降シリカ又はゲル型シリカの場合のように、粉末にするのに乾燥されていない。 Unlike sols formed by dispersing precipitated silica, gel-type silica or fumed silica powder, for example, colloidal particles in sols prepared from alkali metal silicates by ion exchange or pH reduction are, for example, precipitated silica Or, as in the case of gel type silica, it is not dried to powder.
この場合、前記組成物中の粒子はコロイド一次粒子の凝集体であり、これらの一次粒子の平均粒子直径は、好ましくは約５nm〜約１２５nm、最も好ましくは約７nm〜約１００nmである。このコロイド一次粒子は、好ましくは、上記で記載されたように水性ゾルの形態である。 In this case, the particles in the composition are aggregates of colloidal primary particles, and the average particle diameter of these primary particles is preferably from about 5 nm to about 125 nm, most preferably from about 7 nm to about 100 nm. The colloidal primary particles are preferably in the form of an aqueous sol as described above.
多孔質凝集体の分散液を形成するためのゾル中の一次粒子の凝集は、R. K. IIer, "The Chemistry of Silica" 1979, pages 364-407で記載されているような、任意の適切な方法により実施してもよい。この凝集度は、粘度を測定し、アインシュタインとムーニーの方程式を適用すること（例えば、R.K. IIer, "The Chemistry of Silica" 1979, pages 360-364を参照すること）によって、追うことができる。この凝集は、別個の工程として、又は他の顔料粒子も含む混合物中で実施してもよい。 Aggregation of the primary particles in the sol to form a dispersion of porous aggregates can be achieved by any suitable method, such as described in RK IIer, “The Chemistry of Silica” 1979, pages 364-407. You may implement. This degree of aggregation can be followed by measuring the viscosity and applying the Einstein and Mooney equations (see, for example, R.K. IIer, “The Chemistry of Silica” 1979, pages 360-364). This agglomeration may be carried out as a separate step or in a mixture that also contains other pigment particles.
一つの実施態様において、アニオン性ゾル（負電荷を帯びたコロイド一次粒子を含む）及びカチオン性ゾル（正電荷を帯びたコロイド一次粒子を含む）が混合され、両方のゾルからの一次粒子の多孔質凝集体の形成をもたらす。 In one embodiment, an anionic sol (including negatively charged colloidal primary particles) and a cationic sol (including positively charged colloidal primary particles) are mixed and the porosity of the primary particles from both sols is mixed. Resulting in the formation of mass aggregates.
別の実施態様において、好ましくは二価、多価又は錯体塩から選択される塩が、アニオン性又はカチオン性ゾルに添加され、これも、多孔質凝集体の形成をもたらす。これらの塩の例は、塩化アルミニウム、ポリ塩化アルミニウム、ポリ硫酸ケイ酸アルミニウム、硫酸アルミニウム、炭酸ジルコニウム、酢酸ジルコニウム、アルカリ金属ホウ酸塩、及びこれらの混合物である。 In another embodiment, a salt, preferably selected from divalent, multivalent or complex salts, is added to the anionic or cationic sol, which also results in the formation of porous aggregates. Examples of these salts are aluminum chloride, polyaluminum chloride, polyaluminum sulfate silicate, aluminum sulfate, zirconium carbonate, zirconium acetate, alkali metal borates, and mixtures thereof.
なお別の実施態様において、架橋物質が、一次粒子から凝集体を形成するために使用される。適切な架橋物質の例は、ＣＭＣ（カルボキシメチルセルロース）、ＰＡＭ（ポリアクリルアミド）、ポリＤＡＤＭＡＣ（ポリジアリルジメチルアンモニウムクロリド）、ポリアリルアミン、ポリアミン、デンプン、グアーゴム、及びこれらの混合物のような、合成及び天然の高分子電解質である。 In yet another embodiment, a cross-linking material is used to form aggregates from the primary particles. Examples of suitable cross-linking materials are synthetic and natural, such as CMC (carboxymethylcellulose), PAM (polyacrylamide), polyDADMAC (polydiallyldimethylammonium chloride), polyallylamine, polyamine, starch, guar gum, and mixtures thereof. The polymer electrolyte.
上記の凝集方法の１、２又は３つ全てを含むあらゆる組み合わせを利用することもできる。 Any combination including one, two or all three of the above aggregation methods can also be utilized.
それぞれの多孔質凝集体は、本質的に少なくともいくつかの孔を与える少なくとも３つの一次粒子から形成される。この凝集体の平均直径は、好ましくは約０．０３〜約２５μm、より好ましくは約０．０５〜約１０μm、最も好ましくは約０．１μm〜約５μmである。この多孔質凝集体の平均直径は、それらを形成する一次粒子の平均直径よりも常に大きいことが理解されるべきである。この凝集体の表面積は、通常、一次粒子と実質的に同じである。 Each porous aggregate is formed from at least three primary particles that essentially provide at least some pores. The average diameter of the aggregate is preferably from about 0.03 to about 25 μm, more preferably from about 0.05 to about 10 μm, and most preferably from about 0.1 μm to about 5 μm. It should be understood that the average diameter of the porous aggregates is always greater than the average diameter of the primary particles that form them. The surface area of the aggregate is usually substantially the same as the primary particles.
一つの実施態様において、合成非晶質シリカ又はアルミノケイ酸塩の顔料粒子は、場合により部分的に又は完全に凝集している、イオン交換又はｐＨ低減によりアルカリ金属ケイ酸塩から調製されるゾル中のコロイド粒子と、１つ以上の沈降シリカ、ゲル型シリカ又はヒュームドシリカの粒子との混合物である。 In one embodiment, the synthetic amorphous silica or aluminosilicate pigment particles are optionally partially or fully agglomerated in a sol prepared from alkali metal silicates by ion exchange or pH reduction. And a mixture of one or more precipitated silica, gel-type silica or fumed silica particles.
前記顔料組成物中の水溶性アルミニウム塩は、塩を含有する任意のアルミニウムであることができ、乾燥顔料粒子に対するＡｌ2Ｏ3の重量％として計算して、好ましくは約０．１重量％〜約３０重量％、最も好ましくは約０．２〜約１５重量％の量で存在する。これらの塩の例には、塩化アルミニウム、ポリ塩化アルミニウム、ポリ硫酸ケイ酸アルミニウム、硫酸アルミニウム、炭酸ジルコニウム、酢酸ジルコニウム、及びこれらの混合物が挙げられる。このアルミニウムは、シリカ若しくはアミノケイ酸塩の粒子の表面上に、又は水相中に、部分的に又は完全に存在してもよい。 Water-soluble aluminum salts of the pigment composition, the salt can be any aluminum containing, calculated as% by weight of Al 2 O 3 on dry pigment particles, preferably from about 0.1% to It is present in an amount of about 30% by weight, most preferably about 0.2 to about 15% by weight. Examples of these salts include aluminum chloride, polyaluminum chloride, polyaluminum sulfate silicate, aluminum sulfate, zirconium carbonate, zirconium acetate, and mixtures thereof. The aluminum may be present partially or completely on the surface of the silica or aminosilicate particles or in the aqueous phase.
水溶性アルミニウム塩の総含有量は、本顔料組成物を調製するのに使用される、カチオン性アルミニウム変性シリカゾルに存在するものから由来してもよい。しかし、本顔料組成物は、また、追加的なアルミニウム塩を含んでもよい。 The total content of the water-soluble aluminum salt may be derived from that present in the cationic aluminum-modified silica sol used to prepare the present pigment composition. However, the pigment composition may also contain additional aluminum salts.
本顔料組成物中のカチオン性ポリマーは、約２０００〜約１００００００、好ましくは約２０００〜５０００００、最も好ましくは約５０００〜約２０００００の分子量を有する。電荷密度は、約０．２meq/g〜約１２meq/g、好ましくは約０．３meq/g〜約１０meq/g、最も好ましくは約０．５meq/g〜約８meq/gである。前記カチオン性ポリマーは、乾燥顔料粒子の量に基づき、好ましくは約０．１重量％〜約３０重量％、より好ましくは約０．５重量％〜約２０重量％、最も好ましくは約１重量％〜約１５重量％の量で顔料分散体に存在する。適切なカチオン性ポリマーの例には、前記分子量及び電荷密度が上記の要件を満たすのであれば、ＰＡＭ（ポリアクリルアミド）、ポリＤＡＤＭＡＣ（ポリジアリルジメチルアンモニウムクロリド）、ポリアリルアミン、ポリアミン、多糖類、及びこれらの混合物のような合成及び天然の高分子電解質が挙げられる。前記カチオン性ポリマーは、シリカ若しくはアミノケイ酸塩の粒子の表面上に、又は水相中に、部分的に又は完全に存在してもよい。 The cationic polymer in the pigment composition has a molecular weight of about 2000 to about 1000000, preferably about 2000 to 500000, most preferably about 5000 to about 200000. The charge density is from about 0.2 meq / g to about 12 meq / g, preferably from about 0.3 meq / g to about 10 meq / g, most preferably from about 0.5 meq / g to about 8 meq / g. The cationic polymer is preferably from about 0.1 wt% to about 30 wt%, more preferably from about 0.5 wt% to about 20 wt%, most preferably about 1 wt%, based on the amount of dry pigment particles. Present in the pigment dispersion in an amount of up to about 15% by weight. Examples of suitable cationic polymers include PAM (polyacrylamide), polyDADMAC (polydiallyldimethylammonium chloride), polyallylamine, polyamine, polysaccharide, and the like, provided that the molecular weight and charge density meet the above requirements. Synthetic and natural polyelectrolytes such as mixtures of these may be mentioned. The cationic polymer may be present partially or completely on the surface of the silica or aminosilicate particles or in the aqueous phase.
一つの実施態様において、本組成物は、カオリナイト、スメクタイト、タルサイト、炭酸カルシウム鉱物、沈降炭酸カルシウム及びこれらの混合物のような、他の種類の顔料粒子を更に含む。合成非晶質シリカ又はアルミノケイ酸塩粒子の含有量は、顔料粒子の総量に基づき、好ましくは約１０〜１００重量％、最も好ましくは約３０重量％〜１００重量％である。 In one embodiment, the composition further comprises other types of pigment particles, such as kaolinite, smectite, talcite, calcium carbonate mineral, precipitated calcium carbonate and mixtures thereof. The content of synthetic amorphous silica or aluminosilicate particles is preferably about 10 to 100% by weight, most preferably about 30% to 100% by weight, based on the total amount of pigment particles.
本組成物中の合成非晶質シリカ又はアルミノケイ酸塩の顔料粒子と任意の他の顔料粒子の全含有量は、好ましくは約１重量％〜約６０重量％、最も好ましくは約５重量％〜約５０重量％、特に最も好ましくは約１０重量％〜約５０重量％である。 The total content of synthetic amorphous silica or aluminosilicate pigment particles and any other pigment particles in the composition is preferably from about 1 wt% to about 60 wt%, most preferably from about 5 wt% to About 50% by weight, most preferably about 10% to about 50% by weight.
本顔料組成物は、また、顔料粒子の総量に基づき、好ましくは０〜約７０重量％、最も好ましくは０〜約５０重量％の量で紙被覆に適切な被覆結合剤を含んでもよい。紙被覆に慣例的に使用されるそのような結合剤の例は、ポリビニルアルコール、場合により変性されているデンプン、ゴム、タンパク質結合剤（例えば、カゼイン及び大豆タンパク質結合剤）、ラテックス、並びにこれらの混合物である。ラテックスは、スチレンブタジエン、アクリレート、酢酸ビニル、エチレンと酢酸ビニルのコポリマー、スチレンアクリルエステルなどに基づくことができる。１つ以上の結合剤が含まれる場合、ポリビニルアルコールが特に好ましい。 The pigment composition may also comprise a coating binder suitable for paper coating, preferably in an amount of 0 to about 70 wt%, most preferably 0 to about 50 wt%, based on the total amount of pigment particles. Examples of such binders conventionally used in paper coatings are polyvinyl alcohol, optionally modified starches, gums, protein binders (eg casein and soy protein binders), latex, and these It is a mixture. The latex can be based on styrene butadiene, acrylate, vinyl acetate, copolymers of ethylene and vinyl acetate, styrene acrylic esters, and the like. Polyvinyl alcohol is particularly preferred when one or more binders are included.
本顔料組成物は、また、安定剤、レオロジー変性剤、蛍光増白剤、潤滑剤、不溶化剤、染料、サイズ剤などのような紙被覆に慣用的に使用される他の添加剤、ならびに原材料からの多様な不純物を含んでもよい。本顔料組成物の乾燥含有量は、好ましくは約２重量％〜約７５重量％、最も好ましくは約１０重量％〜約７０重量％である。他の添加剤（任意の結合剤を除く）及び可能な不純物の総量は、乾燥含有量に基づき、好ましくは０〜約５０重量％、最も好ましくは０〜約３０重量％である。 The pigment composition also contains other additives conventionally used in paper coatings such as stabilizers, rheology modifiers, optical brighteners, lubricants, insolubilizers, dyes, sizing agents, etc., as well as raw materials May contain various impurities. The dry content of the pigment composition is preferably from about 2% to about 75%, most preferably from about 10% to about 70% by weight. The total amount of other additives (excluding optional binders) and possible impurities is preferably 0 to about 50 wt%, most preferably 0 to about 30 wt%, based on dry content.
上記で記載された顔料組成物は、好ましくは少なくとも１週間、最も好ましくは少なくとも１か月間は貯蔵安定している。この組成物は、紙又は板紙を被覆するために直接使用してもよいか、又は被覆組成物を調製するための中間生成物を形成してもよい。 The pigment compositions described above are preferably shelf stable for at least 1 week, most preferably for at least 1 month. This composition may be used directly to coat paper or paperboard, or may form an intermediate product for preparing a coating composition.
好ましくは４５０m2/g未満の小さい表面積を有するシリカ又はアルミノケイ酸塩の場合により凝集された一次粒子の顔料粒子を含み、前記のイオン交換又はｐＨ低減によりアルカリ金属ケイ酸塩から調製された組成物では、上記の結合剤を含まないか、又は低量の結合剤、例えば、乾燥顔料に対して、顔料粒子の総量の例えば約３重量％未満、好ましくは約２重量％未満、最も好ましくは約１重量％未満の結合剤を含む顔料組成物により紙又は板紙を被覆することによって、満足できる結果が得られることが見出された。 A composition prepared from an alkali metal silicate by ion exchange or pH reduction as described above, comprising pigment particles of silica or aluminosilicate, preferably agglomerated primary particles, preferably having a small surface area of less than 450 m 2 / g In the absence of the above-mentioned binders or low amounts of binders, for example dry pigments, for example less than about 3% by weight of the total amount of pigment particles, preferably less than about 2%, most preferably about It has been found that satisfactory results are obtained by coating paper or paperboard with a pigment composition comprising less than 1% by weight of a binder.
本発明は、更に、合成非晶質シリカ又はケイ酸塩の粒子、水溶性アルミニウム塩、及び約２０００〜約１００００００の分子量と約０．２meq/g〜約１２meq/gの電荷密度を有するカチオン性ポリマーを、実質的にゲル化又は沈殿を避ける方法で混合して水性分散液にすることを含む、上記記載の顔料組成物の製造方法に関する。これは、幾つかの代替的な方法の実施態様により達成することができる。 The present invention further includes synthetic amorphous silica or silicate particles, water-soluble aluminum salts, and cationic having a molecular weight of about 2000 to about 1000000 and a charge density of about 0.2 meq / g to about 12 meq / g. The present invention relates to a method for producing a pigment composition as described above, which comprises mixing a polymer in a manner that substantially avoids gelation or precipitation into an aqueous dispersion. This can be achieved by several alternative method embodiments.
一つの代替的な方法の実施態様は、合成非晶質シリカ又はアルミノケイ酸塩の粒子を、水溶性アルミニウム塩の水溶液に加え、続いて上記で記載されたカチオン性ポリマーを加える工程を含む。他の顔料粒子又は結合剤のような他の各成分を、任意の段階において、固体、液体又は分散液の形態で加えてもよい。前記シリカ又はアルミノケイ酸塩の粒子は、固体粉末又はコロイド粒子の水性ゾルの形態であってもよく、これはアニオン性であっても、カチオン性であってもよい。カチオン性ゾルが使用されないのであれば、前記アルミニウム塩は、好ましくは、得られる分散液を主にカチオン性にするのに十分であるような過剰量である。少なくとも、アニオン性ゾルが使用される場合は、コロイド粒子の少なくとも一部が凝集していてもよい。 One alternative method embodiment includes the steps of adding synthetic amorphous silica or aluminosilicate particles to an aqueous solution of a water soluble aluminum salt followed by the cationic polymer described above. Other components, such as other pigment particles or binders, may be added at any stage in the form of a solid, liquid or dispersion. The silica or aluminosilicate particles may be in the form of a solid powder or an aqueous sol of colloidal particles, which may be anionic or cationic. If no cationic sol is used, the aluminum salt is preferably in excess such that it is sufficient to make the resulting dispersion predominantly cationic. At least when an anionic sol is used, at least a part of the colloidal particles may be aggregated.
別の代替的な方法は、合成非晶質シリカ又はアルミノケイ酸塩の粒子を、上記で記載されたカチオン性ポリマーの水溶液に加え、続いて水溶性アルミニウム塩を加える工程を含む。他の顔料粒子又は結合剤のような他の各成分を、任意の段階において、固体、液体又は分散液の形態で加えてもよい。前記シリカ又はアルミノケイ酸塩の粒子は、固体粉末又はコロイド粒子の水性ゾルの形態であってもよく、これはアニオン性であっても、カチオン性であってもよい。カチオン性ゾルが使用されないのであれば、前記カチオン性ポリマーは、好ましくは、得られる分散液を主にカチオン性にするのに十分であるような過剰量である。少なくとも、アニオン性ゾルが使用される場合は、コロイド粒子の少なくとも一部が凝集していてもよい。 Another alternative method involves adding synthetic amorphous silica or aluminosilicate particles to an aqueous solution of the cationic polymer described above, followed by the addition of a water soluble aluminum salt. Other components, such as other pigment particles or binders, may be added at any stage in the form of a solid, liquid or dispersion. The silica or aluminosilicate particles may be in the form of a solid powder or an aqueous sol of colloidal particles, which may be anionic or cationic. If a cationic sol is not used, the cationic polymer is preferably in excess such that it is sufficient to make the resulting dispersion predominantly cationic. At least when an anionic sol is used, at least a part of the colloidal particles may be aggregated.
なお別の方法の実施態様は、コロイドシリカ又はアルミノケイ酸塩のカチオン性アルミニウム変性水性ゾルと、カチオン性ポリマーとを混合する工程を含む。可能ではあるが、コロイドシリカ又はアルミノケイ酸塩のゾルに存在しているものの他に、更なる水溶性アルミニウム塩を加えることは必要ではない。他の顔料粒子又は結合剤のような他の各成分を、任意の段階において、固体、液体又は分散液の形態で加えてもよい。 Yet another method embodiment includes mixing a cationic aluminum modified aqueous sol of colloidal silica or aluminosilicate with a cationic polymer. Although possible, it is not necessary to add further water-soluble aluminum salts in addition to those present in colloidal silica or aluminosilicate sols. Other components, such as other pigment particles or binders, may be added at any stage in the form of a solid, liquid or dispersion.
各成分の適切であり、かつ好ましい量及び種類に関しては、上記記載の顔料組成物が参照される。 For the appropriate and preferred amounts and types of each component, reference is made to the pigment compositions described above.
本発明は、また、紙又は板紙を被覆するための、上記記載の顔料組成物の使用に関する。 The invention also relates to the use of a pigment composition as described above for coating paper or paperboard.
本発明は、更に、上記で記載された被覆組成物を、紙又は板紙ウエブの少なくとも１つの面に被覆物として塗布する工程を含む、被覆紙又は板紙の製造方法に関する。 The invention further relates to a method for producing a coated paper or paperboard comprising the step of applying the coating composition described above as a coating on at least one surface of the paper or paperboard web.
この被覆物は、紙又は板紙ウエブの被覆面１つあたり、前記顔料組成物から、好ましくは約０．４g/m2〜約４０g/m2、より好ましくは約０．５g/m2〜約４０g/m2、最も好ましくは約１g/m2〜約２０g/m2の、合成非晶質シリカ又はアルミノケイ酸塩の顔料粒子及び場合により他の顔料粒子を生じるのに十分な量で塗布される。大部分の場合において、紙又は板紙の被覆面１つあたりに塗布される被覆物の乾燥量は、好ましくは約０．７g/m2〜約５０g/m2、最も好ましくは約１．０g/m2〜約２５g/m2である。 The coatings, coated side one per paper or paperboard web, from the pigment composition, preferably from about 0.4 g / m 2 ~ about 40 g / m 2, more preferably from about 0.5 g / m 2 ~ about 40 g / m 2 , most preferably about 1 g / m 2 to about 20 g / m 2 , applied in an amount sufficient to produce synthetic amorphous silica or aluminosilicate pigment particles and optionally other pigment particles. The In most cases, the dry amount of coating applied per coated surface of paper or paperboard is preferably about 0.7 g / m 2 to about 50 g / m 2 , most preferably about 1.0 g / m 2 . m 2 to about 25 g / m 2 .
前記被覆物は、好ましくは紙又は板紙の非被覆面に塗布されるが、また、既に塗布されている被覆層の上に、同じ又は別の被覆組成物により塗布されてもよい。本明細書で記載された被覆物から形成される層の上に、他の種類のあらゆる更なる被覆物を塗布しないことが好ましい。 The coating is preferably applied to the uncoated surface of paper or paperboard, but may also be applied over the already applied coating layer with the same or another coating composition. It is preferred not to apply any other types of additional coatings over the layers formed from the coatings described herein.
前記被覆物を塗布することは、紙若しくは板紙抄紙機の上、又は紙若しくは板紙抄紙機の外のいずれかで、実施することができる。いずれの場合でも、あらゆる種類の被覆方法が使用できる。これらの被覆方法の例は、ブレードコーティング、エアナイフコーティング、ロールコーティング、カーテンコーティング、スプレーコーティング、サイズプレスコーティング（例えば、フィルムプレスコーティング）、及びキャストコーティングである。 Applying the coating can be carried out either on paper or paperboard machine or outside the paper or paperboard machine. In any case, any kind of coating method can be used. Examples of these coating methods are blade coating, air knife coating, roll coating, curtain coating, spray coating, size press coating (eg film press coating), and cast coating.
この被覆物を塗布した後、この紙は乾燥され、機械上の場合は、被覆物は好ましくは機械の乾燥セクションで達成される。赤外線放射、熱風、加熱シリンダー、又はこれらの任意の組み合わせのような、あらゆる乾燥方法を使用してもよい。 After applying the coating, the paper is dried and, if on the machine, the coating is preferably accomplished in the drying section of the machine. Any drying method may be used, such as infrared radiation, hot air, a heated cylinder, or any combination thereof.
本明細書で使用されるとき、被覆という用語は、顔料が紙又は板紙の表面に塗布されるあらゆる方法を意味し、したがって、従来の被覆のみならず、例えば顔料着色のような他の方法も含む。 As used herein, the term coating means any method by which a pigment is applied to the surface of a paper or paperboard, and thus not only conventional coatings, but also other methods such as pigmenting. Including.
この被覆される紙及び板紙は、硫酸塩、亜硫酸及びオルガノソルブパルプのような化学パルプ、サーモメカニカルパルプ（ＴＭＰ）、ケムサーモメカニカルパルプ（ＣＴＭＰ）のような機械パルプ、未使用若しくは回収繊維又はこれらの任意の組み合わせに基づく硬材及び軟材のさらし又は未さらしパルプの両方からの精砕パルプ又は砕木パルプのような、あらゆる種類のパルプから作製できる。他のあらゆる種類のパルプからの紙及び板紙もまた、本発明により被覆されてもよい。 The coated paper and paperboard can be chemical pulps such as sulfate, sulfite and organosolv pulp, mechanical pulps such as thermomechanical pulp (TMP), chemthermomechanical pulp (CTMP), unused or recovered fibers or these Can be made from any type of pulp, such as refined pulp or groundwood pulp from both hardwood and softwood bleached or unbleached pulp based on any combination of Paper and paperboard from any other type of pulp may also be coated according to the present invention.
本顔料組成物の更なる詳細及び実施態様に関しては、上記記載のものが参照される。 For further details and embodiments of the present pigment composition, reference is made to what has been described above.
本発明は、最後に、上記で記載された方法により得られる、インクジェット印刷に適切な紙又は板紙に関する。そのような紙又は板紙は、本被覆組成物からの、合成非晶質シリカ又はアルミノケイ酸塩の顔料粒子及び場合により他の顔料粒子を含む、実質的に透明な又は実質的に非透明な層を含み、この顔料粒子は、好ましくはナノ構造を形成する。この被覆物の乾燥量は、好ましくは約０．５g/m2〜約５０g/m2、最も好ましくは約１．０g/m2〜約２５g/m2である。前記紙又は板紙の被覆面１つあたりの、上記で記載された顔料組成物からの顔料粒子の量は、好ましくは約０．７g/m2〜約４０g/m2、最も好ましくは約１．０g/m2〜約２０g/m2である。好ましくは、この層の上に他の種類の被覆物は塗布されない。 The present invention finally relates to paper or paperboard suitable for ink jet printing, obtained by the method described above. Such paper or paperboard is a substantially transparent or substantially non-transparent layer comprising synthetic amorphous silica or aluminosilicate pigment particles and optionally other pigment particles from the present coating composition. The pigment particles preferably form nanostructures. The dry amount of the coating is preferably from about 0.5 g / m 2 to about 50 g / m 2 , most preferably from about 1.0 g / m 2 to about 25 g / m 2 . The amount of pigment particles from the pigment composition described above per coated surface of the paper or paperboard is preferably from about 0.7 g / m 2 to about 40 g / m 2 , most preferably about 1. 0 g / m 2 to about 20 g / m 2 . Preferably, no other type of coating is applied over this layer.
本発明の紙又は板紙は、線の低いぼやけ及び色むら、並びに色の高い印刷濃度を与えるインクジェット印刷に特に良好な特性を有するが、有利には、トナー、フレキソ印刷、凸版印刷、グラビア印刷、オフセット印刷及びスクリーン印刷のような他の種類の印刷法にも使用できることが、見出されている。少量の被覆物を塗布するだけの、多数の異なる被覆層を紙又は板紙に塗布する必要のない簡単な方法によって、そのような良好な特性を得ることができることが特に有利である。これは、この被覆物を、フィルムプレスのようなサイズプレスにより塗布することも可能にし、このことは、実用的な理由から有利である。更に、本顔料組成物の主要成分は、容易に入手可能な原材料から作製できる。 The paper or paperboard of the present invention has particularly good properties for ink jet printing which gives low line blur and color unevenness and high color print density, but advantageously, toner, flexographic printing, letterpress printing, gravure printing, It has been found that it can also be used for other types of printing methods such as offset printing and screen printing. It is particularly advantageous to be able to obtain such good properties by a simple method that does not require applying a large number of different coating layers to paper or paperboard, only by applying a small amount of coating. This also allows the coating to be applied by a size press such as a film press, which is advantageous for practical reasons. Furthermore, the main components of the pigment composition can be made from readily available raw materials.
ここで本発明を以下の実施例で更に説明する。特に記述のない限り、全ての部及び百分率は、重量部及び重量％を意味する。 The invention will now be further described in the following examples. Unless otherwise stated, all parts and percentages refer to parts by weight and percentages by weight.
実施例１：Grace Davisonからのゲル型シリカ顔料Sylojet（商標）P612を用いて、３つの被覆配合物を作製した。３つの配合物の全てにおいて、ポリビニルアルコール結合剤（ACETEX Co., SpainからのERKOL（商標）26/88）を結合剤として使用した。このポリビニルアルコール（ＰＶＡ）を水に９０℃で溶解して、１０重量％の濃度にし、２０部の結合剤（乾燥）を与える量で、シリカ顔料１００部（乾燥）に加えた。これらの３つの被覆配合物における顔料粒子の総含有量は、２０重量％であった。
Ａ）１０重量％ＰＶＡ溶液２０ｇを水２０ｇで希釈した。乾燥粉末Sylojet（商標）１０ｇを、UltraTurrax（商標）中、激しい混合下（１００００rpm）でこの溶液にゆっくりと加えた。
Ｂ）１つのビーカー中で、Sylojet（商標）１０ｇ、１０重量％ＰＶＡ ２０ｇ、及び水１０ｇをＡと同様に混合した。別のビーカー中で、Clariantからのアルミニウムクロロ水和物Locron（商標）（２５％Ａｌ2Ｏ3）３ｇを水７ｇで希釈した。UltraTurrax（商標）混合下で、前記ＰＶＡ−Sylojet（商標）スラリーを、Locron（商標）溶液にゆっくりと加えた。
Ｃ）１つのビーカー中で、ＰＶＡ−Sylojetスラリーを、Ｂと同様に調製した。別のビーカー中で、Locron（商標）３ｇを水３．５ｇで希釈し、Sylojet（商標）−ＰＶＡスラリーをLocron（商標）溶液と、Ｂと同様に混合した。最後に、ポリＤＡＤＭＡＣ（４０重量％、分子量２００００及び電荷密度７．２meq/g）１．５ｇを、水２ｇで希釈し、前記Sylojet（商標）−ＰＶＡ−Locron（商標）スラリーに加えた。
Example 1 Three coating formulations were made using the gel type silica pigment Sylojet ™ P612 from Grace Davison. In all three formulations, a polyvinyl alcohol binder (ERKOL ™ 26/88 from ACETEX Co., Spain) was used as the binder. This polyvinyl alcohol (PVA) was dissolved in water at 90 ° C. to a concentration of 10% by weight and added to 100 parts of silica pigment (dry) in an amount to give 20 parts of binder (dry). The total pigment particle content in these three coating formulations was 20% by weight.
A) 20 g of a 10 wt% PVA solution was diluted with 20 g of water. 10 g of dry powder Sylojet ™ was slowly added to this solution in an UltraTurrax ™ under vigorous mixing (10000 rpm).
B) In one beaker, 10 g of Sylojet ™, 20 g of 10 wt% PVA, and 10 g of water were mixed as in A. In a separate beaker, 3 g of aluminum chlorohydrate Locron ™ (25% Al 2 O 3 ) from Clariant was diluted with 7 g of water. The PVA-Sylojet ™ slurry was slowly added to the Locron ™ solution under UltraTurrax ™ mixing.
C) A PVA-Sylojet slurry was prepared as in B in one beaker. In a separate beaker, 3 g of Locron ™ was diluted with 3.5 g of water and the Sylojet ™ -PVA slurry was mixed with Locron ™ solution as in B. Finally, 1.5 g of polyDADMAC (40 wt%, molecular weight 20000 and charge density 7.2 meq / g) was diluted with 2 g of water and added to the Sylojet ™ -PVA-Locron ™ slurry.
前記３つの被覆配合物を、未被覆コピー用紙（M-realからのＡ４サイズData Copy）の表面に、実験室被覆試験で慣用的に使用されるワイヤ付ロッドを用いたドローダウン法により塗布した。この被覆の後、この紙をＩＲ乾燥機（Hedson Technologies AB Sweden）で乾燥した。これらの乾燥した紙のシートを、２台のインクジェットプリンタ、Hewlett-PackardからのHP Deskjet（商標）5850及びEpsonからのEpson Stylus（商標）C86で評価した。 The three coating formulations were applied to the surface of an uncoated copy paper (A4 size Data Copy from M-real) by a drawdown method using a wire rod commonly used in laboratory coating tests. . After this coating, the paper was dried with an IR dryer (Hedson Technologies AB Sweden). These dried paper sheets were evaluated with two inkjet printers, the HP Deskjet ™ 5850 from Hewlett-Packard and the Epson Stylus ™ C86 from Epson.
印刷の結果を、７個の色ブロック：シアン、マゼンタ、イエロー、レッド、グリーン、ブルー及びブラックを有する印刷像を使用して評価した。これらの印刷されたブロック及び印刷されていない紙を、分光光度計（TechnidyneからのColor Touch 2）で測定し、色域量を計算した。この域量を、CEI L*a*b*色空間の十二面体で概算し、この色の測定値は、十二面体の角を与える（"Rydefalk Staffan, Wedin Michael; Litterature review on the colour Gamut in the Printing Process-Fundamentals, PTF-report no 32, May 1997"を参照すること）。これらの結果を以下の表に示す。 The printing results were evaluated using printed images with 7 color blocks: cyan, magenta, yellow, red, green, blue and black. These printed blocks and unprinted paper were measured with a spectrophotometer (Color Touch 2 from Technidyne) and the color gamut was calculated. This amount is approximated by a dodecahedron in the CEI L * a * b * color space, and this color measurement gives the angle of the dodecahedron ("Rydefalk Staffan, Wedin Michael; Litterature review on the color Gamut in the Printing Process-Fundamentals, PTF-report no 32, May 1997 "). These results are shown in the table below.
被覆配合物Ｃが、最良の総合的な色域量を与えたことを見ることができる。また可視判断が、良好な線の鮮鋭度、及び色むらの傾向がないことを明らかにした。 It can be seen that coating formulation C gave the best overall color gamut amount. In addition, the visual judgment revealed that there was no good line sharpness and no color unevenness tendency.
実施例２：これらの配合物において、使用されるゲル型シリカの等しい部分（乾燥／乾燥）を有する顔料ブレンドは、Sylojet（商標）P612（実施例１と同じ）、及び５０重量％のゾルが平均粒径１００nmである、Eka Chemicalsからのアニオン性シリカゾルNyacol（商標）9950であった。結合剤として、実施例１と同じ量及び同じ種類のＰＶＡを使用した。２０重量％の総顔料含有量を有する２つの被覆配合物を調製した。
Ａ）乾燥シリカゲル（Sylojet（商標）P612）を、Nyacol（商標）9950 １０ｇ、１０重量％ＰＶＡ ２０ｇ、及び水１５ｇを含有する溶液に、UltraTurrax（商標）混合下（１００００rpm）で分散した。
Ｂ）１つのビーカー中で、乾燥シリカゲル（Sylojet（商標）P612）５ｇを、Nyacol（商標）9950 １０ｇ及び１０重量％ＰＶＡ ２０ｇを含有する溶液に、UltraTurrax（商標）混合下（１００００rpm)で分散した。別のビーカー中で、Locron（商標）３ｇを水７ｇと混合した。次に最初のビーカーのスラリーを、UltraTurrax（商標）混合下で Locron（商標）溶液に移し、その後、水３．５ｇによる前希釈の後で、ポリＤＡＤＭＡＣ（実施例１と同じもの）１．５ｇを加えた。
Example 2: In these formulations, a pigment blend with an equal part (dry / dry) of the gel-type silica used is Sylojet ™ P612 (same as Example 1), and 50 wt% sol An anionic silica sol Nyacol ™ 9950 from Eka Chemicals with an average particle size of 100 nm. As the binder, the same amount and the same type of PVA as in Example 1 were used. Two coating formulations were prepared having a total pigment content of 20% by weight.
A) Dry silica gel (Sylojet ™ P612) was dispersed in a solution containing 10 g Nyacol ™ 9950, 20 g 10% wt PVA and 15 g water under UltraTurrax ™ mixing (10000 rpm).
B) In one beaker, 5 g of dry silica gel (Sylojet ™ P612) was dispersed in a solution containing 10 g of Nyacol ™ 9950 and 20 g of 10 wt% PVA under UltraTurrax ™ mixing (10000 rpm). . In a separate beaker, 3 g of Locron ™ was mixed with 7 g of water. The first beaker slurry is then transferred to a Locron ™ solution under UltraTurrax ™ mixing, followed by 1.5 g of polyDADMAC (same as Example 1) after pre-dilution with 3.5 g of water. Was added.
実施例１と同様の手順に従って、これらの被覆物を紙に塗布し、乾燥して、２台のプリンタにより評価した。これらの結果を以下の表に示す。 According to the same procedure as in Example 1, these coatings were applied to paper, dried and evaluated by two printers. These results are shown in the table below.
被覆配合物Ｂが、両方のプリンタでより良好な印刷品質を与えたと思われる。 It appears that Coating Formulation B gave better print quality with both printers.
実施例３：この試験では、５０重量％のゾルが平均直径４０nmである、Eka Chemicalsからのアニオン性シリカゾルBindzil（商標）50/80を顔料として使用した。２つの配合物をＰＶＡ結合剤を何も用いないで調製した。
Ａ）３０重量％に希釈した Bindzil（商標）50/80
Ｂ）Locron（商標）６ｇを水２０ｇで希釈し、Bindzil（商標）50/80 ６０ｇを、激しい混合下（UltraTurrax（商標））で加えた。この混合を、ポリＤＡＤＭＡＣ（実施例１と同じもの）３ｇ及び水１１ｇの添加の間続けた。シリカの最終濃度は３０重量％となった。
Example 3 In this test, an anionic silica sol Bindzil ™ 50/80 from Eka Chemicals, in which 50% by weight of the sol has an average diameter of 40 nm, was used as the pigment. Two formulations were prepared without any PVA binder.
A) Bindzil ™ 50/80 diluted to 30% by weight
B) 6 g of Locron ™ was diluted with 20 g of water and 60 g of Bindzil ™ 50/80 was added under vigorous mixing (UltraTurrax ™). This mixing was continued during the addition of 3 g of polyDADMAC (same as in Example 1) and 11 g of water. The final silica concentration was 30% by weight.
実施例１と同様の手順に従って、これらの被覆物を紙に塗布し、乾燥して（被覆重量８〜９g/m2）、２台のプリンタにより評価した。これらの結果を以下の表に示す。 According to the same procedure as in Example 1, these coatings were applied to paper, dried (coating weight 8-9 g / m 2 ) and evaluated by two printers. These results are shown in the table below.
被覆配合物ＡがEpsonで僅かに良好な域量を与えたが、配合物Ｂは、HPで著しく良好であり、したがって、最良の総合的な結果を与えたと考えることができる。また可視判断が、良好な線の鮮鋭度、及び色むらの傾向がないことを明らかにした。 Although coating formulation A gave slightly better dosages with Epson, formulation B was significantly better with HP and could therefore be considered to have given the best overall results. In addition, the visual judgment revealed that there was no good line sharpness and no color unevenness tendency.
実施例４：４つの被覆配合物を調製した。アニオン性シリカゾル、Bindzil（商標）50/80と、カオリン、被覆粘土（SPS（商標）、Imerys, UK）の等しい部分（乾燥／乾燥）を持つ顔料組成物を、全ての配合物で使用した。実施例３と同様に、ＰＶＡのような外部の結合剤をいずれの配合物にも使用しなかった。
Ａ）Bindzil（商標）50/80、SPS（商標）粘土及び水を、UltraTurrax（商標）中で混合して、３０重量％の顔料濃度にした。
Ｂ）Bindzil（商標）１５ｇ（乾燥）及びSPS粘土１５ｇを含有する顔料スラリーを、Locron（商標）６ｇ（そのまま）を含有する水溶液に、UltraTurrax（商標）混合下で加え、最終顔料濃度が３０重量％になった。
Ｃ）ポリＤＡＤＭＡＣ（実施例１と同じもの）３ｇを水で希釈し、 Bindzil（商標）（乾燥）１５ｇ及びSPS（商標）粘土１５ｇを含有する顔料スラリーに、UltraTurrax（商標）混合下で加えて、固形分３０重量％の顔料とした。
Ｄ）顔料スラリーをLocron（商標）溶液と、Ａと同様に混合した。UltraTurrax混合を続け、ポリＤＡＤＭＡＣ（実施例１と同じもの）３ｇを水で希釈し、Locron処理顔料スラリーに加えて、最終顔料含有量３０重量％を得た。
Example 4: Four coating formulations were prepared. A pigment composition with an anionic silica sol, Bindzil ™ 50/80, and an equal portion (dry / dry) of kaolin, coated clay (SPS ™, Imerys, UK) was used in all formulations. As in Example 3, no external binder such as PVA was used in any of the formulations.
A) Bindzil ™ 50/80, SPS ™ clay and water were mixed in an UltraTurrax ™ to a pigment concentration of 30% by weight.
B) A pigment slurry containing 15 g Bindzil ™ (dry) and 15 g SPS clay is added to an aqueous solution containing 6 g (as is) Locron ™ under mixing UltraTurrax ™, resulting in a final pigment concentration of 30 wt. %Became.
C) 3 g of polyDADMAC (same as in Example 1) is diluted with water and added to a pigment slurry containing 15 g Bindzil ™ (dry) and 15 g SPS ™ clay under UltraTurrax ™ mixing. A pigment having a solid content of 30% by weight was obtained.
D) The pigment slurry was mixed with the Locron ™ solution as in A. UltraTurrax mixing was continued and 3 g of polyDADMAC (same as Example 1) was diluted with water and added to the Locron treated pigment slurry to give a final pigment content of 30% by weight.
実施例１と同様の手順に従って、これらの被覆物を紙に塗布し、乾燥して（被覆重量８〜９g/m2）、２台のプリンタにより評価した。これらの結果を以下の表に示す。 According to the same procedure as in Example 1, these coatings were applied to paper, dried (coating weight 8-9 g / m 2 ) and evaluated by two printers. These results are shown in the table below.
アルミニウム塩とカチオン性低分子ポリマーの両方を含有する配合物Ｄが、両方のプリンタで最良の結果を与えたと思われる。 Formulation D containing both an aluminum salt and a cationic low molecular weight polymer appears to give the best results with both printers.
Claims (17)
（ｂ）少なくとも１つの水溶性アルミニウム塩と、
（ｃ）約２０００〜約１００００００の分子量及び約０．２〜約１２meq/gの電荷密度を有する少なくとも１つのカチオン性ポリマーと
を含む、水性分散液の形態の顔料組成物。 (A) synthetic amorphous silica or aluminosilicate pigment particles;
(B) at least one water-soluble aluminum salt;
(C) a pigment composition in the form of an aqueous dispersion comprising: at least one cationic polymer having a molecular weight of from about 2000 to about 1000000 and a charge density of from about 0.2 to about 12 meq / g.
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| JP2017512164A (en) * | 2014-03-14 | 2017-05-18 | ストラ エンソ オーワイジェイ | Method for producing packaging material and packaging material produced by the method |
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| US7682438B2 (en) | 2005-11-01 | 2010-03-23 | International Paper Company | Paper substrate having enhanced print density |
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