JPH03197574A - Planographic ink composition - Google Patents
Planographic ink compositionInfo
- Publication number
- JPH03197574A JPH03197574A JP1334898A JP33489889A JPH03197574A JP H03197574 A JPH03197574 A JP H03197574A JP 1334898 A JP1334898 A JP 1334898A JP 33489889 A JP33489889 A JP 33489889A JP H03197574 A JPH03197574 A JP H03197574A
- Authority
- JP
- Japan
- Prior art keywords
- water
- ink
- resin
- ink composition
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 71
- 229920005989 resin Polymers 0.000 claims abstract description 36
- 239000011347 resin Substances 0.000 claims abstract description 36
- 239000002245 particle Substances 0.000 claims abstract description 16
- 239000002250 absorbent Substances 0.000 claims abstract description 14
- 239000002253 acid Substances 0.000 claims abstract description 11
- 150000003839 salts Chemical class 0.000 claims abstract description 11
- 239000010419 fine particle Substances 0.000 claims abstract description 5
- 230000002745 absorbent Effects 0.000 claims description 12
- 229920000180 alkyd Polymers 0.000 abstract description 2
- 239000003086 colorant Substances 0.000 abstract description 2
- 239000003822 epoxy resin Substances 0.000 abstract description 2
- 239000003607 modifier Substances 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 abstract description 2
- 239000005011 phenolic resin Substances 0.000 abstract description 2
- 229920000647 polyepoxide Polymers 0.000 abstract description 2
- 239000000976 ink Substances 0.000 description 56
- 230000000694 effects Effects 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 4
- 229940093915 gynecological organic acid Drugs 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 235000019198 oils Nutrition 0.000 description 4
- 150000007524 organic acids Chemical class 0.000 description 4
- 235000005985 organic acids Nutrition 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 229920000578 graft copolymer Polymers 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 150000007522 mineralic acids Chemical class 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 238000010186 staining Methods 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical class [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 2
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- -1 alkali metal salts Chemical class 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 229920000137 polyphosphoric acid Polymers 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 description 1
- 229920002785 Croscarmellose sodium Polymers 0.000 description 1
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 1
- UEZVMMHDMIWARA-UHFFFAOYSA-N Metaphosphoric acid Chemical compound OP(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 235000011054 acetic acid Nutrition 0.000 description 1
- BAPJBEWLBFYGME-UHFFFAOYSA-N acrylic acid methyl ester Natural products COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- NPERTKSDHFSDLC-UHFFFAOYSA-N ethenol;prop-2-enoic acid Chemical compound OC=C.OC(=O)C=C NPERTKSDHFSDLC-UHFFFAOYSA-N 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- NKHAVTQWNUWKEO-UHFFFAOYSA-N fumaric acid monomethyl ester Natural products COC(=O)C=CC(O)=O NKHAVTQWNUWKEO-UHFFFAOYSA-N 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 235000012208 gluconic acid Nutrition 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 235000021388 linseed oil Nutrition 0.000 description 1
- 239000000944 linseed oil Substances 0.000 description 1
- 235000010187 litholrubine BK Nutrition 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000001630 malic acid Substances 0.000 description 1
- 235000011090 malic acid Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- DHCDFWKWKRSZHF-UHFFFAOYSA-N sulfurothioic S-acid Chemical compound OS(O)(=O)=S DHCDFWKWKRSZHF-UHFFFAOYSA-N 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 239000004034 viscosity adjusting agent Substances 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
「発明の目的」
［産業上の利用分野」
本発明は、平版用インキ組成物に関するものであり、更
に詳しくは湿し水が少なくても１
汚れの発生し難い平版用インキ組成物に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Object of the invention] [Industrial application field] The present invention relates to an ink composition for lithographic printing, and more specifically to a lithographic printing plate that is resistant to staining even when the amount of dampening water is small. The present invention relates to an ink composition for use in printing.
［従来の技術］
現在、印刷の主流をなす平版印刷においては、水と油性
インキとが互いに反発するのを利用して、親水性の非画
線部には湿し水を供給してインキを反発させ、親油性の
画線部には油性インキを付着させてから画線部上の油性
インキを被印刷物に転移させて印刷をおこなっている。[Prior art] In lithographic printing, which is currently the mainstream printing method, water and oil-based ink repel each other, and dampening water is supplied to hydrophilic non-image areas to ink. Printing is performed by causing repulsion, and applying oil-based ink to the lipophilic image area, and then transferring the oil-based ink on the image area to the printing material.
そして、非画線部にインキ等が１４着することによる汚
れは湿し水中に混入されている酸等の働きにより除去し
ていた。The stains caused by ink and the like deposited on the non-image areas were removed by the action of acids and the like mixed in the dampening water.
つまり、平版印刷法においては湿し水は重要な働きをし
ており、インキと湿し水との供給量の最適なバランスが
求められていた。In other words, dampening water plays an important role in lithographic printing, and an optimal balance between the supply amounts of ink and dampening water is required.
しかし、実際には印刷物の図柄やインキの量との関係は
かりてはなく印刷速度、室温、湿度、紙質、重ね刷り条
件なとの変化に応して湿し水の供給量も変化さぜねはな
らないので、そのコントロールが困難であり、湿し水が
少なすぎれば、親水柱部分のインキの汚れが除去出来な
くなってしまい、逆に多すぎるとインキの流動性等の印
刷適性が劣化して地汚れとなり、またインキの転移性が
不良となって印刷画像が不鮮明になり色調が変化するな
どの問題が生し易かった。However, in reality, there is no relationship between the design of the printed material and the amount of ink, and the amount of dampening water supplied changes depending on changes in printing speed, room temperature, humidity, paper quality, overprinting conditions, etc. If there is too little dampening water, it will not be possible to remove the ink stains in the hydrophilic column, and if there is too much dampening water, the printability such as the fluidity of the ink will deteriorate. Problems such as background smearing and poor ink transfer properties tend to cause printed images to become unclear and change in color tone.
このインキと湿し水との供給バランスの調整には、高度
な技術と経験が必要とされており、印刷物の品質の均質
性を保ち難かったので、印刷機上において湿し水の供給
量に多少の変化があっても汚れを発生させず、當に安定
して良好な印刷物が得られるような、いわゆる水幅適性
の良好なインキが求められていた。Adjusting the supply balance between ink and dampening water requires advanced technology and experience, and it has been difficult to maintain uniform quality of printed matter, so the amount of dampening water supplied on the printing press has to be adjusted. There has been a need for an ink that has good water width suitability, which does not cause staining even when there is some change, and allows stable and good printed matter to be obtained.
従来、この問題を解決するための他の方法として、イン
キ中にあらかじめ界面活性剤や多価アルコール等の湿潤
性液体と水とを加えたＷ１０型エマルジョンが提案され
た。Conventionally, as another method for solving this problem, a W10 type emulsion was proposed in which a wetting liquid such as a surfactant or polyhydric alcohol and water were added in advance to the ink.
これは、インキ中に水分を含有させておくことにより、
平版の非画線部へのインキの付着性を低下させて、湿し
水の供給量が不足した際も汚れの発生を防止しようとい
うものであるが、これまで３−
に提案されたエマルジョンインキは、界面活性剤や、特
別なフェノを使用したり、アルミニュウＪ１キレート化
合物を添加したり、高粘度な湿潤性液体を使用したりす
る等の方法であり、いずれの方法も、これらの添加剤の
配合によりインキの性能や物性が変化して印刷適性が不
良となり易く、また、水分の含有量が増えるにつれてエ
マルションの安定性が悪くなり経時変化により水分が分
離し易くなるので必要量の水分を含有させることか出来
ず、効果を得るまでには至らなかった。This is achieved by keeping moisture in the ink.
The idea is to reduce the adhesion of ink to the non-image areas of the lithographic plate and prevent staining even when the supply of dampening water is insufficient. These methods include using surfactants, special phenols, adding Aluminum J1 chelate compounds, and using high viscosity wetting liquids. The performance and physical properties of the ink change depending on the formulation of the agent, which tends to cause poor printability.Also, as the water content increases, the stability of the emulsion deteriorates and water tends to separate over time, so it is necessary to keep the necessary amount of water. However, it was not possible to incorporate it, and it was not possible to obtain any effects.
［発明が解決しようとする課題］
各種印刷条件が変化し、湿し水の供給量が不足ぎみにな
ったときでも汚れを発生させないで、常に良好な印刷適
性を保持することが出来る平版インキ組成物を提供する
ことを目的とするものである。[Problem to be solved by the invention] A lithographic ink composition that does not generate stains and can always maintain good printability even when various printing conditions change and the supply of dampening water becomes insufficient. The purpose is to provide something.
「発明の構成」
［課題を解決するための手段］
高吸水性樹脂微粉末は、自重の数百倍の水分を吸収して
もゲル状にならずに真球状を維持したよ４−
まシャーベットのような状態を形成している性質に着目
し、特定のＰＨに調整した水を特定量吸収させた高吸水
性樹脂微粉末をインキ中に添加混合させることにより、
インキの物性をあまり変化させずに望みの量の水分をイ
ンキ中に混合させることが可能になった。"Structure of the Invention" [Means for Solving the Problems] The super-absorbent resin fine powder maintains its true spherical shape without becoming gel-like even after absorbing several hundred times its own weight of water. Focusing on the properties that form a state like this, by adding and mixing into the ink a super absorbent resin fine powder that has absorbed a specific amount of water adjusted to a specific pH,
It has become possible to mix the desired amount of water into the ink without significantly changing the physical properties of the ink.
このインキ中に分散されている高吸水性樹脂微粉末に吸
収されている特定のＰＨ範囲に調整された水分は、印刷
機のインキローラー間をインキが移動する間に、理由は
不明ではあるが、一部の水分が分離・放出されてインキ
中で乳化状態となり、次に、版面に供給されている湿し
水中のアルコールがインキ中に混入されると、その影響
で更に多量の水分が分離・放出されるようになる。Although the reason is unknown, the water adjusted to a specific pH range that is absorbed by the super absorbent resin fine powder dispersed in this ink is absorbed while the ink moves between the ink rollers of the printing machine. , some of the water is separated and released and becomes emulsified in the ink.Next, when the alcohol in the dampening water supplied to the plate is mixed into the ink, even more water is separated.・Starts to be released.
この放出された水分は、酸またはその塩類でＰＨが２．
０〜７．０に調整されているので版の非画線部の汚れを
除去する作用、つまり整面作用があるので、外部より供
給されている湿し水の量が不足がちなときに非画線部に
発生し易い地汚れを容易に除去し、かつ防止することが
出来ることを見−
出し本発明を完成させた。すなわち、酸またはその塩類
でＰＨ２，０〜７．０に調整した水を自重の５０倍以下
の量となるように吸収している高吸水性樹脂からなる微
粒子を３〜５０重量％含有していることを特徴とする平
版用インキ組成物である。This released moisture is acid or its salts and has a pH of 2.
Since it is adjusted between 0 and 7.0, it has the effect of removing dirt from the non-printing areas of the plate, that is, it has a surface leveling effect, so it can be used when the amount of dampening water supplied from the outside tends to be insufficient. The inventors have discovered that it is possible to easily remove and prevent background stains that tend to occur in printed areas, and have completed the present invention. In other words, it contains 3 to 50% by weight of fine particles made of a super absorbent resin that absorbs water adjusted to pH 2.0 to 7.0 with an acid or its salt in an amount of 50 times its own weight or less. This is a lithographic ink composition characterized by comprising:
本発明で使用する高吸水性樹脂は、架橋ポリアクリル酸
ソーダ、酢酸ビニル・アクリル酸メチル共重合体ケン化
物、酢酸ビニル・マレイン酸モノメチル共重合体ケン化
物、イソブチレン・無水マレイン酸共重合体ケン化物、
でん粉・アクリル酸グラフト重合体、多糖類・アクリル
酸グラフト重合体、でん粉・アクリルニトリルグラフト
重合体の加水分解物、ＣＭＣの架橋物、架橋ポリエチレ
ンオキサイド等や、その他市販されている高吸水性樹脂
のなかから選ばれた各種のものが使用出来る。The super absorbent resins used in the present invention include cross-linked sodium polyacrylate, saponified vinyl acetate/methyl acrylate copolymer, saponified vinyl acetate/monomethyl maleate copolymer, and saponified isobutylene/maleic anhydride copolymer. monster,
Starch/acrylic acid graft polymer, polysaccharide/acrylic acid graft polymer, starch/acrylic acid graft polymer hydrolyzate, crosslinked CMC, crosslinked polyethylene oxide, etc., and other commercially available super absorbent resins. Various types selected from among them can be used.
本発明でいう高吸水性樹脂とは、水と接触すると水に溶
解はしないが、樹脂１ｇ当り４００ｇ以上の極めて多く
の水分を吸収するものであり、しかも吸水速度が速いビ
ーズ状自己架橋型樹脂を指６−
本発明で使用する高吸水性樹脂は、その粒径が５ミクロ
ン以下の球状の一次粒子か、または適当な粉砕機によっ
て５ミクロン以下に微粉砕され、篩分けされたものが使
用できる。The superabsorbent resin used in the present invention is a bead-shaped self-crosslinking resin that does not dissolve in water when it comes into contact with water, but absorbs an extremely large amount of water, 400 g or more per 1 g of resin, and has a high water absorption rate. Finger 6 - The superabsorbent resin used in the present invention is either a spherical primary particle with a particle size of 5 microns or less, or one that has been pulverized to 5 microns or less by an appropriate pulverizer and sieved. can.
５ミクロン以上のものを使用すると、印刷物に汚れが生
し易くなり品質が低下するで不適当である。If the diameter is 5 microns or more, it is unsuitable because the prints tend to become stained and the quality deteriorates.
また、自重の５０倍程度の水を吸収させても、その粒径
が１５０ミクロン以下であるような、吸水後のゲル強度
の強いものが使用できる。Further, it is possible to use a material that has a strong gel strength after water absorption, such that the particle size is 150 microns or less even when it absorbs about 50 times its own weight of water.
吸水後の粒径が１５０ミクａン以上にもなるような樹脂
を使用すると、印刷物に斑点状の白抜き部分か発生する
ようになるので不適当である。If a resin with a particle size of 150 microns or more after water absorption is used, it is not suitable because it will result in speckled white areas on printed matter.
本発明で、高吸水性樹脂粒子に吸収させる水としては、
酸またはその塩類でＰＨ２，０〜７．０に調整した水が
使用出来る。In the present invention, water to be absorbed by super absorbent resin particles includes:
Water adjusted to pH 2.0 to 7.0 with an acid or its salt can be used.
酸またはその塩類としては、ｐＨの調整のために通常の
湿し水で使用されている酸や、その塩類は全て使用でき
るが、例えば、無機酸としては、一
燐酸、メタ燐酸、ポリ燐酸等の縮合燐酸や、硝酸、亜硝
酸、硫酸、亜硫酸、チオ硫酸、はう酸などが使用でき、
有機酸としては、グリコール酸、酢酸、クエン酸、グル
コン酸、酒石酸、乳酸、林檎酸、アスコルビン酸、スル
フアニン酸等があり、無機塩としては、前期無機酸のア
ンモニュウム塩やアルカリ金属塩などが使用でき、有機
酸の塩としては、前記有機酸のアンモニウユム塩やアル
カリ金属塩などがあげられる。As acids or their salts, all acids and their salts that are used in normal dampening water for pH adjustment can be used, but for example, as inorganic acids, monophosphoric acid, metaphosphoric acid, polyphosphoric acid, etc. Condensed phosphoric acid, nitric acid, nitrous acid, sulfuric acid, sulfurous acid, thiosulfuric acid, oxalic acid, etc. can be used.
Organic acids include glycolic acid, acetic acid, citric acid, gluconic acid, tartaric acid, lactic acid, malic acid, ascorbic acid, sulfanic acid, etc., and inorganic salts include ammonium salts and alkali metal salts of earlier inorganic acids. Examples of the salts of organic acids include ammonium salts and alkali metal salts of the organic acids.
Ｐ Ｈが ２，０以下では、版の非画像部を損傷させる
恐れがあり、 ７．０以上では版の整面効果が低下する
ので不適当である。If P H is less than 2.0, there is a risk of damaging the non-image area of the plate, and if it is more than 7.0, the flattening effect of the plate will deteriorate, which is inappropriate.
本発明によりＰＩ（２，０〜７．０に調整した水を自重
の５０倍以下、好ましくは２〜３０倍の水を吸収させれ
ばよい。According to the present invention, water adjusted to PI (2.0 to 7.0) may absorb up to 50 times its own weight, preferably 2 to 30 times its own weight.
２倍以下では水分量が少なすぎるため高吸水性樹脂から
の水分の放出がさせ難くなり、５０倍以」−では水分が
分離し易くなるので不適当である。If it is less than 2 times, the water content is too small and it becomes difficult to release water from the superabsorbent resin, and if it is more than 50 times, the water content becomes easy to separate, which is inappropriate.
インキの主成分としては、従来型油性インキに使用され
ているアルキド樹脂、フェノール樹脂、エポキシ樹脂、
ロジン変性フェノール樹脂、石油樹脂なとの各種公知の
ものが使用できる。The main components of ink are alkyd resins, phenolic resins, epoxy resins, which are used in conventional oil-based inks,
Various known resins such as rosin-modified phenolic resin and petroleum resin can be used.
着色剤としては、高吸水性樹脂の含有水分の安定性に悪
影響を与えないものならば、従前より印刷インキ用とし
て使用されてきた公知の各種有機系や無機系顔料のほか
に、一部の染料も使用することが出来る。As colorants, in addition to various well-known organic and inorganic pigments that have been used for printing inks, as long as they do not adversely affect the stability of the water content of the superabsorbent resin, some pigments can be used. Dyes can also be used.
このほかに、本発明の目的を害さない程度ならば、各種
公知のインキ変性剤類、例えは湿潤剤、粘度調整剤用コ
ンパウンド、皮張防止剤、体質顔料などを添加してもよ
い。In addition, various known ink modifiers, such as wetting agents, viscosity modifier compounds, anti-skinning agents, extender pigments, etc., may be added to the extent that they do not impede the purpose of the present invention.
本発明で使用されるインキは、３本ロール機、フラッシ
ャ−機、ビーズミル機などにより常法に従ってヘースイ
ンキを先ず製造し、次に、酸また塩類でＰＨ２，０〜７
．０に調整した水を自重の５０倍以下の量となるように
吸収している高吸水性樹脂からなる微粒子を１〜３０重
量％の範囲内になるようにベースインキ中に配合してか
ら、プレート型攪拌機等により高吸水性樹脂粒子から脱
水しないように低速度で攪拌して分散混合させる。The ink used in the present invention is prepared by first producing a haese ink using a three-roll machine, a flasher machine, a bead mill, etc. in accordance with a conventional method, and then adding an acid or salt to a pH of 2.0 to 7.
．． Fine particles made of a super absorbent resin that absorbs water adjusted to zero in an amount of 50 times its own weight or less are blended into the base ink in a range of 1 to 30% by weight, and then Dispersion is mixed by stirring at a low speed using a plate type stirrer or the like so as not to dehydrate the super absorbent resin particles.
−
インキ中に分散される高吸水性樹脂粒子は、吸収してい
る水分の重量との合計で１〜３０重量％、好ましくは２
〜２０重量％となるように添加すれはよい。- The superabsorbent resin particles dispersed in the ink are 1 to 30% by weight, preferably 2% by weight, including the weight of absorbed water.
It is preferable to add it in an amount of up to 20% by weight.
１重量％以下では、水分量が少なすぎるため地汚れ防止
効果が不十分てあり、３０重量％以上では、水分放出量
が多すぎてインキの転移性が減少して印刷物の濃度が低
下してしまうので不適当なのである。If it is less than 1% by weight, the water content is too small and the scumming prevention effect is insufficient, and if it is more than 30% by weight, the amount of water released is too large, reducing the transferability of the ink and reducing the density of printed matter. It's inappropriate because it puts it away.
添加量が２〜２０重量％の範囲なら地汚れ防止効果も高
く、しかもインキの転移性も低下しないので良好な濃度
を有する印刷物が得られるようになるので最も好ましい
。If the amount added is in the range of 2 to 20% by weight, it is most preferable because the scumming prevention effect is high and the transferability of the ink does not decrease, making it possible to obtain printed matter with good density.
本発明によるインキ中には、整面性の高い無機、有機の
酸・塩類でＰＨ２，０〜７．０に調整した水を含有した
高吸水性樹脂が配合されているので、印刷時には最適な
水量が版面に放出されて版面の非画像部にインキが付着
する地汚れを防止する効果が高くなったので、供給する
湿し水の量を低下させることが可能になった。The ink of the present invention contains a highly water-absorbing resin containing water whose pH is adjusted to 2.0 to 7.0 with inorganic and organic acids and salts that have high leveling properties, so it is optimal for printing. Since the amount of water released onto the printing plate is more effective in preventing scumming, where ink adheres to non-image areas of the printing plate, it has become possible to reduce the amount of dampening water to be supplied.
１〇−
インキ中の水分は、高吸水性樹脂により吸着されている
ので、インキの貯蔵中には分離する恐れはないので、長
期間の貯蔵に耐えるようになり、また、各種印刷条件の
変化にもかかわらず、インキと湿し水の量的バランスを
常時コントロールする必要もなくなり、常に安定した品
質の印刷物が得られるようになるという思いがけない効
果が得られるようになった。10- Since the water in the ink is adsorbed by the superabsorbent resin, there is no risk of the ink separating during storage, so it can withstand long-term storage, and it can also withstand changes in various printing conditions. Despite this, there is no need to constantly control the quantitative balance of ink and dampening water, and the unexpected effect is that printed matter can always be of stable quality.
［実施例］
以下に実施例を示すが、本発明は以下の実施例により限
定されるものではない。[Example] Examples are shown below, but the present invention is not limited by the following examples.
なお、実施例中の部は重量部を、％は重量％を示す。In the examples, parts indicate parts by weight, and % indicates weight %.
実施例１〜５、比較例１〜６゜ 実施例と、比較例との配合比率を第１表に示す。Examples 1 to 5, Comparative Examples 1 to 6° Table 1 shows the blending ratios of Examples and Comparative Examples.
ベースインキは、ロジン変性フェノール樹脂タマノール
３５０（荒用化学工業社商品名）とアマニ油とを主成分
とせるワニスに、顔料としてカーミン６Ｂ（大同化成社
製）を１５％混合して溶剤で粘度を調整しながら三本ロ
ールミルにて練肉す１１−
ることにより製造した。このベースインキは実施例、比
較例の各インキに共通して使用した。The base ink is made by mixing 15% Carmine 6B (manufactured by Daido Kasei Co., Ltd.) as a pigment with a varnish whose main components are rosin-modified phenolic resin Tamanol 350 (trade name of Arayo Kagaku Kogyo Co., Ltd.) and linseed oil. It was manufactured by kneading it in a three-roll mill while adjusting the ingredients. This base ink was used in common for each ink of Examples and Comparative Examples.
ＰＨは蒸留水中にポリ燐酸及びそのナトリュウム塩と硝
酸及びそのナトリュウム塩を１：１で混合したものを添
加することにより１．０，３．０゜５．０，８．０に調
整した溶液を作ってから、高吸水性樹脂スミカゲル（住
友化学工業社商品名）微粉末に、ＰＨが１．０，５．０
，８．０の溶液は樹脂の自重の１０倍となるように含有
させ、ＰＨ３，０のみは、樹脂の自重の２０倍、４０倍
、６０倍となるように含有させたものを使用した。The pH was adjusted to 1.0, 3.0°, 5.0, 8.0 by adding a 1:1 mixture of polyphosphoric acid and its sodium salt and nitric acid and its sodium salt to distilled water. After making it, add super absorbent resin Sumikagel (product name of Sumitomo Chemical Industries, Ltd.) to fine powder with a pH of 1.0 and 5.0.
, 8.0 was contained in an amount 10 times the weight of the resin itself, and only PH 3.0 was used in a concentration 20 times, 40 times, and 60 times the weight of the resin itself.
含水後の高吸水性樹脂は、その樹脂粒子の直径が５μ以
下のもののみを使用したが、ＰＨ３，０に調整した水を
自重の４０倍含有させた高吸水性樹脂の場合だけは、含
水後の樹脂粒子の直径が１５０μ以上のものも使用した
。We used only super absorbent resins whose resin particles had a diameter of 5μ or less after being hydrated. The latter resin particles having a diameter of 150 μm or more were also used.
各実施例、比較例についてインキ安定性、地汚れ性、印
刷濃度、印刷物の白抜きの状況などについて観察し、良
好は○、やや不良はΔ、不良は×の三点法で評価した。For each Example and Comparative Example, the ink stability, background smudge resistance, printing density, white outline of the printed matter, etc. were observed and evaluated using a three-point system of ○ for good, Δ for slightly poor, and × for poor.
その結果を第２表に示す。The results are shown in Table 2.
２
インキ安定性は、インキ製造後２５°Ｃ１湿度６５％で
３ケ月保存した後に、水の分離状態や、インキの流動
性等の変化を測定した。2. Ink stability was determined by storing the ink at 25° C. and 65% humidity for 3 months after manufacture, and then measuring changes in water separation state, ink fluidity, etc.
印刷は、コンベンショナル型の湿し水供給装置を有する
リスロン４５（小森印刷機械社商品名）の印刷機で水目
盛りは標準より３つ下げ、コニカ社製ポジ型ＰＳ版を使
用して、毎時 １１，０００枚の速度で印刷し、刷り出
し後１時間、及び３時間後の地汚れの状態を測定した。Printing was carried out using a Lithrone 45 (trade name, Komori Printing Machinery Co., Ltd.) printing machine with a conventional dampening water supply device, the water scale was 3 levels lower than the standard, and a Konica positive PS plate at a rate of 11 per hour. ,000 sheets, and the state of scumming was measured 1 hour and 3 hours after printing.
第 １
表
１３−
１４
第
２
表
そして、印刷時の強圧により最適な量の整面液がインキ
中より常時放出されるので、湿し水の量が不足すること
により生ずる地汚れを防止することが可能になった。Table 1 Table 13-14 Table 2 And, since the optimum amount of surface leveling liquid is constantly released from the ink due to the strong pressure during printing, it is possible to prevent scumming caused by insufficient amount of dampening water. is now possible.
そのため、湿し水の供給量のコントロールが容易となる
ばかりか、湿し水の供給量を著しく減少させることが出
来るので、大幅な印刷画質の改善が可能になるなと、そ
の産業上の効果は大きなものがある。Therefore, it is not only easier to control the amount of dampening water supplied, but also the amount of dampening water supplied can be significantly reduced, making it possible to significantly improve print image quality. There is something big.
［発明の効果］
以上説明したとおり、本発明による平版インキ組成物は
、整面効果の有るＰＨ２，０〜７．０の範囲に調整され
た水を最適な量となるように高吸水性樹脂に吸収させた
ものをインキ中に特定の量になるように分散させである
ので、従来のエマルジョンインキ等とは異なり、長期間
保存しても極めて安定で、水が分離するようなことはな
く、インキの流動性なとの物性を変化させる恐れはなく
なった。[Effects of the Invention] As explained above, the lithographic ink composition according to the present invention contains an optimal amount of water adjusted to a pH range of 2,0 to 7.0, which has a surface smoothing effect, and a super water absorbent resin. The ink is absorbed by water and dispersed in a specific amount in the ink, so unlike conventional emulsion inks, it is extremely stable even when stored for long periods of time, and there is no chance of water separating. There is no longer any fear of changing the fluidity or other physical properties of the ink.
Claims (2)
た水を自重の５０倍以下の量となるように吸収している
高吸水性樹脂からなる微粒子を１〜３０重量％含有して
いることを特徴とする平版インキ組成物。(1) Contains 1 to 30% by weight of fine particles made of a super absorbent resin that absorbs water adjusted to pH 2.0 to 7.0 with an acid or its salt in an amount of 50 times its own weight or less. A lithographic ink composition characterized by:
クロン以下であり、自重の５０倍程度の水を吸収させて
も、その粒径が１５０ミクロン以下であるような微粒子
である特許請求の範囲第１項記載の平版インキ組成物。(2) The superabsorbent resin is a fine particle whose particle size is 5 microns or less before adding water, and whose particle size is 150 microns or less even after absorbing about 50 times its own weight of water. A lithographic ink composition according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1334898A JPH03197574A (en) | 1989-12-26 | 1989-12-26 | Planographic ink composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1334898A JPH03197574A (en) | 1989-12-26 | 1989-12-26 | Planographic ink composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03197574A true JPH03197574A (en) | 1991-08-28 |
Family
ID=18282471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1334898A Pending JPH03197574A (en) | 1989-12-26 | 1989-12-26 | Planographic ink composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03197574A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009114358A (en) * | 2007-11-07 | 2009-05-28 | Sakata Corp | Ink composition for offset printing for computer-to-plate (ctp) plate |
-
1989
- 1989-12-26 JP JP1334898A patent/JPH03197574A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009114358A (en) * | 2007-11-07 | 2009-05-28 | Sakata Corp | Ink composition for offset printing for computer-to-plate (ctp) plate |
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