JPH0256234B2 - - Google Patents
Info
- Publication number
- JPH0256234B2 JPH0256234B2 JP7340782A JP7340782A JPH0256234B2 JP H0256234 B2 JPH0256234 B2 JP H0256234B2 JP 7340782 A JP7340782 A JP 7340782A JP 7340782 A JP7340782 A JP 7340782A JP H0256234 B2 JPH0256234 B2 JP H0256234B2
- Authority
- JP
- Japan
- Prior art keywords
- inositohexaphosphate
- potassium
- nickel
- treatment liquid
- desensitizing
- 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.)
- Expired
Links
- 239000007788 liquid Substances 0.000 claims description 19
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 8
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 8
- 229910000008 nickel(II) carbonate Inorganic materials 0.000 claims description 7
- ZULUUIKRFGGGTL-UHFFFAOYSA-L nickel(ii) carbonate Chemical compound [Ni+2].[O-]C([O-])=O ZULUUIKRFGGGTL-UHFFFAOYSA-L 0.000 claims description 7
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 7
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910052700 potassium Inorganic materials 0.000 claims description 4
- 239000011591 potassium Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- -1 Hexasodium triethylenetetramine hexane Chemical compound 0.000 claims description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 12
- 239000000243 solution Substances 0.000 description 11
- 150000001875 compounds Chemical class 0.000 description 7
- 238000007645 offset printing Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 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
- 150000002148 esters Chemical class 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003975 dentin desensitizing agent Substances 0.000 description 2
- 238000000586 desensitisation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 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
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 description 1
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- ODEGFPCTGGIJCF-UHFFFAOYSA-A P(=O)([O-])([O-])[O-].P(=O)([O-])([O-])[O-].P(=O)([O-])([O-])[O-].P(=O)([O-])([O-])[O-].P(=O)([O-])([O-])[O-].P(=O)([O-])([O-])[O-].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+] Chemical compound P(=O)([O-])([O-])[O-].P(=O)([O-])([O-])[O-].P(=O)([O-])([O-])[O-].P(=O)([O-])([O-])[O-].P(=O)([O-])([O-])[O-].P(=O)([O-])([O-])[O-].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+].[K+] ODEGFPCTGGIJCF-UHFFFAOYSA-A 0.000 description 1
- 239000004288 Sodium dehydroacetate Substances 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
- 150000001412 amines Chemical class 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- YAGKRVSRTSUGEY-UHFFFAOYSA-N ferricyanide Chemical class [Fe+3].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] YAGKRVSRTSUGEY-UHFFFAOYSA-N 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- WPPVJSFNBNUTHQ-UHFFFAOYSA-H hexasodium N'-[2-(2-aminoethylamino)ethyl]ethane-1,2-diamine hexaacetate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].CC([O-])=O.CC([O-])=O.CC([O-])=O.CC([O-])=O.CC([O-])=O.CC([O-])=O.NCCNCCNCCN WPPVJSFNBNUTHQ-UHFFFAOYSA-H 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000001630 malic acid Substances 0.000 description 1
- 235000011090 malic acid Nutrition 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229940079839 sodium dehydroacetate Drugs 0.000 description 1
- 235000019259 sodium dehydroacetate Nutrition 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- DSOWAKKSGYUMTF-GZOLSCHFSA-M sodium;(1e)-1-(6-methyl-2,4-dioxopyran-3-ylidene)ethanolate Chemical compound [Na+].C\C([O-])=C1/C(=O)OC(C)=CC1=O DSOWAKKSGYUMTF-GZOLSCHFSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N3/00—Preparing for use and conserving printing surfaces
- B41N3/08—Damping; Neutralising or similar differentiation treatments for lithographic printing formes; Gumming or finishing solutions, fountain solutions, correction or deletion fluids, or on-press development
Landscapes
- Printing Plates And Materials Therefor (AREA)
Description
本発明はオフセツト印刷版用処理液に関し、詳
しくは電子写真法で画像を形成させた電子写真複
写材料をオフセツト印刷原版とする際に用いる不
感脂化処理液に関する。
酸化亜鉛のごとき光導電性粉末と樹脂結着剤を
感光層とする電子写真オフセツト印刷原版（以下
マスターと称する）は、感光層面に帯電、露光、
現像及び定着の操作を施して親油性画像を形成さ
せ、不感脂化処理液で処理してつくられる。
一般に、オフセツト印刷ではマスター表面に処
理液を塗布して非画像部に親水性被膜を形成せし
め、油性インキの付着を防ぎ、一方画像部には油
性インキを付着せしめ、このインキによつて形成
された画像を紙に転写する印刷方法であることは
周知の通りである。
従来、このような不感脂化処理液としてはフエ
ロシアン化合物及びフエリシアン化合物を主成分
とするものが公知であり、これらの処理液は不感
脂化力が強く有効なものであるが、フエロシアン
イオン及びフエリシアンは熱や光に対して不安定
であり、またシアンイオンを含むため遊離のシア
ンとして検出されるので公害上種々の問題を提起
することになる。
しかるに本発明は、公害上問題となり且つ熱、
光によつて劣化するフエロシアン化合物及びフエ
リシアン化合物を含まず、無害の物質のみをその
構成成分とする優れた不感脂化処理液を提供する
ものである。
すなわち本発明は、イノシツトヘキサリン酸エ
ステルと炭酸カリウムおよび炭酸ニツケルを反応
させて生成したイノシツトヘキサリン酸カリウム
塩およびイノシツトヘキサリン酸ニツケル塩の混
合物にヘキサソジウムトリエチレンテトラミンヘ
キサアセテート（以下TTHA−6Na）とポリア
クリル酸ナトリウムを含有することを特徴とする
不感脂化処理液である。
従来、イノシツトヘキサリン酸エステルおよび
その塩は金属とキレート化合物をつくることは周
知の通りであるが、単独でオフセツト印刷用の不
感脂化剤として用いても弱い不感脂化力しかな
く、マスター基材の非画像部の親水化を充分にな
し得ないため不感脂化処理剤としての実用性は乏
しい。
本発明の処理液はイノシツトヘキサリン酸エス
テルと金属の異なる２種類の炭酸塩を特定のモル
比でそれぞれ反応させ、TTHA−6Na、および
ポリアクリル酸ナトリウムを含有させることによ
つて、オフセツトマスター表面上に存在する酸化
亜鉛の如き多価金属の酸化物との反応性を著しく
向上させたものである。
具体的には、イノシツトヘキサリン酸エステル
と炭酸カリウムとのモル比が１：0.05〜１のイノ
シツトヘキサリン酸カリウム塩と、イノシツトヘ
キサリン酸エステルと炭酸ニツケルとのモル比が
１：0.01〜0.5のイノシツトヘキサリン酸ニツケ
ル塩を配合させ、多価金属の酸化物との反応促進
剤としてTTHA−6Naを0.01〜0.5重量％、さら
にポリアクリル酸ナトリウムを20〜30重量％併用
した水溶液であり、そのPH値は４〜５の範囲内に
あることを特徴とするオフセツト印刷用不感脂化
処理液である。
ヘキサリン酸エステルと炭酸塩との反応モル比
は最適比が存在し、特に重要である。ヘキサリン
酸エステルと炭酸カリウムのモル比は１：0.5〜
１特に好ましくは１：0.1〜0.3であり、ヘキサリ
ン酸エステルと炭酸ニツケルのモル比は１：0.01
〜0.5特に好ましくは１：0.05〜0.1の範囲である。
上記ヘキサリン酸カリウム塩とヘキサリン酸ニ
ツケル塩の混合物の比率は１〜５：１であり、こ
れらが固形分濃度として不感脂化処理液中に５〜
15重量％の範囲で含有される場合が適しており、
これ以外の範囲では印刷特性が悪くなる。
また、ポリアクリル酸ナトリウムは重合度500
〜3000のものが好ましい。
本発明の処理液には、上記成分の他にPH調整剤
としてクエン酸、マロン酸、リンゴ酸、グレコー
ル酸等の有機酸、リン酸、硫酸等の無機酸、水酸
化カリウム、水酸化カルシウム等の塩基性水酸化
物、PH緩衝剤としてリン酸のアンモニウム塩、ナ
トリウム塩、カリウム塩等、湿潤剤としてエチレ
ングリコール、グリセリン、ソルビトール等、防
腐剤としてサリチル酸、デヒドロ酢酸ナトリウム
等、また防錆剤としてアミン類、EDTA等、適
当量添加して使用できる。
本発明の処理液を実施するにあたり、処理液の
PH値は４〜５の範囲が適正値であり、最も不感脂
化効果が発揮される。また本処理液は２〜10倍に
希釈して湿し水として使用することもできる。
上記の如く本発明の処理液は、公害上問題とな
り、かつ熱や光によつて経時劣化するフエロシア
ン化合物及びフエリシアン化合物を一切含まず無
毒性分質のみをその機械成分とするものである。
従来のヘキサリン酸エステルの金属塩を主体にし
た処理液に比べて、マスター表面の金属酸化物と
の反応性が著しく速くなり、従つて短時間で不感
脂化処理ができ、かつ保水性が大巾に向上したも
のである。
以下実施例、比較例にて説明する。
実施例 １
イノシツトヘキサリン酸エステル／炭酸カリウ
ム（モル比１／0.1）50ｇ、イノシツトヘキサリ
ン酸エステル／炭酸ニツケル（モル比１／0.1）
50ｇ、TTHA−6Na0.15ｇ、およびポリアクリ
ル酸ナトリウム20ｇを水1000ｇに溶解し、水酸化
カリウムでPHを4.4に調整して処理液とした。
実施例 ２
イノシツトヘキサリン酸エステル／炭酸カリウ
ム（モル比１／0.3）50ｇ、イノシツトヘキサリ
ン酸エステル／炭酸ニツケル（モル比１／0.05）
50ｇ、TTHA−6Na5ｇ、クエン酸ニアンモン10
ｇ、およびポリアクリル酸ナトリウム30ｇを水
1000ｇに溶解し、水酸化ナトリウムでPHを4.6に
調整して処理液とした。
比較例 １
イノシツトヘキサリン酸カリウム塩50ｇを水
1000ｇに溶解し、水酸化カリウムでPHを4.4に調
整して処理液とした。
比較例 ２
イノシツトヘキサリン酸ニツケル塩100ｇ、お
よびポリアクリル酸ナトリウム20ｇを水1000ｇに
溶解し、水酸化ナトリウムでPHを4.4に調整して
処理液とした。
比較例 ３
イノシツトヘキサリン酸エステル／炭酸カリウ
ム（モル比１／0.1）50ｇ、イノシツトヘキサリ
ン酸エステル／炭酸ニツケル（モル比１／0.1）
50ｇを水1000ｇに溶解し、水酸化カリウムでPHを
4.4に調整して処理液とした。
次に、市販の酸化亜鉛〜樹脂分散系の電子写真
感光材料に、常法により画像を形成させた後、上
記の各々の処理液を自動エツチング装置（リコー
プロセツサー）に入れて、感光層をエツチングし
てオフセツト印刷原版とし、湿し水には各々の処
理液を５倍に希釈したものを用いて印刷を行つ
た。その結果を表に示す。
The present invention relates to a treatment liquid for offset printing plates, and more particularly to a desensitization treatment liquid used when an electrophotographic copying material on which an image has been formed by electrophotography is used as an offset printing original plate. An electrophotographic offset printing original plate (hereinafter referred to as a master) whose photosensitive layer is a photoconductive powder such as zinc oxide and a resin binder has a photosensitive layer surface that is charged, exposed, and exposed to light.
It is produced by performing development and fixing operations to form a lipophilic image, which is then treated with a desensitizing treatment liquid. In general, in offset printing, a treatment liquid is applied to the surface of the master to form a hydrophilic film on the non-image area to prevent oil-based ink from adhering to it, while an oil-based ink is applied to the image area and the area formed by this ink is It is well known that this is a printing method that transfers an image onto paper. Hitherto, as such desensitizing treatment liquids, those containing ferrocyan compounds and ferricyan compounds as main components have been known, and these treatment liquids have strong desensitizing power and are effective, but they do not contain ferrocyan ions and ferricyanide compounds. Felician is unstable to heat and light, and since it contains cyanide ions, it is detected as free cyanide, which poses various problems in terms of pollution. However, the present invention poses a problem in terms of pollution and heat,
An object of the present invention is to provide an excellent desensitizing treatment liquid that does not contain ferrocyanic compounds and ferricyanic compounds that are degraded by light, and which contains only harmless substances as constituent components. That is, the present invention involves adding hexasodium triethylenetetramine hexaacetate ( This is a desensitizing treatment liquid characterized by containing TTHA-6Na) and sodium polyacrylate. It is well known that inositohexalic acid esters and their salts form chelate compounds with metals, but even when used alone as a desensitizing agent for offset printing, they have only a weak desensitizing effect, and cannot be mastered. Since the non-image area of the base material cannot be made sufficiently hydrophilic, it has poor practicality as a desensitizing agent. The treatment liquid of the present invention is produced by reacting inositohexalic acid ester with two types of carbonates of different metals at specific molar ratios, and by containing TTHA-6Na and sodium polyacrylate. It has significantly improved reactivity with polyvalent metal oxides such as zinc oxide present on the master surface. Specifically, potassium inositohexaphosphate has a molar ratio of inositohexaphosphate to potassium carbonate of 1:0.05 to 1, and a molar ratio of inositohexaphosphate to nickel carbonate is 1:1. 0.01 to 0.5 of nickel inositohexaphosphate was blended, and 0.01 to 0.5% by weight of TTHA-6Na and 20 to 30% by weight of sodium polyacrylate were used as reaction accelerators with polyvalent metal oxides. This is a desensitizing liquid for offset printing, which is an aqueous solution and has a pH value within the range of 4 to 5. The reaction molar ratio of hexaphosphate and carbonate has an optimum ratio and is particularly important. The molar ratio of hexaphosphate and potassium carbonate is 1:0.5~
1 Particularly preferably 1:0.1 to 0.3, and the molar ratio of hexaphosphate to nickel carbonate is 1:0.01.
-0.5, particularly preferably 1:0.05-0.1. The ratio of the mixture of potassium hexaphosphate and nickel hexaphosphate is 1 to 5:1, and the solid content of these is 5 to 5:1 in the desensitizing solution.
It is suitable if the content is in the range of 15% by weight.
In a range other than this, the printing characteristics deteriorate. In addition, sodium polyacrylate has a polymerization degree of 500.
~3000 is preferred. In addition to the above ingredients, the treatment liquid of the present invention includes organic acids such as citric acid, malonic acid, malic acid, and glycolic acid, inorganic acids such as phosphoric acid and sulfuric acid, potassium hydroxide, calcium hydroxide, etc. as pH adjusters. basic hydroxide, ammonium salt, sodium salt, potassium salt of phosphoric acid as a PH buffer, ethylene glycol, glycerin, sorbitol, etc. as a wetting agent, salicylic acid, sodium dehydroacetate, etc. as a preservative, and as a rust preventive agent. Appropriate amounts of amines, EDTA, etc. can be added. When implementing the treatment liquid of the present invention, the treatment liquid
The appropriate pH value is in the range of 4 to 5, and the most desensitizing effect is achieved. This treatment liquid can also be diluted 2 to 10 times and used as a dampening solution. As mentioned above, the treatment liquid of the present invention does not contain any ferrocyan compounds or ferricyan compounds which cause pollution problems and deteriorate over time due to heat and light, and has only non-toxic substances as its mechanical components.
Compared to conventional treatment solutions based on metal salts of hexaphosphate esters, the reactivity with metal oxides on the master surface is significantly faster, allowing desensitization treatment to be carried out in a shorter period of time and with greater water retention. This is a huge improvement. This will be explained below using Examples and Comparative Examples. Example 1 50 g of inositohexaphosphate/potassium carbonate (molar ratio 1/0.1), inositohexaphosphate/nickel carbonate (molar ratio 1/0.1)
50 g of TTHA-6Na, 0.15 g of TTHA-6Na, and 20 g of sodium polyacrylate were dissolved in 1000 g of water, and the pH was adjusted to 4.4 with potassium hydroxide to prepare a treatment liquid. Example 2 Inositohexaphosphate/potassium carbonate (mole ratio 1/0.3) 50g, inositohexaphosphate/nickel carbonate (mole ratio 1/0.05)
50g, TTHA-6Na5g, Niammon citrate 10
g, and 30 g of sodium polyacrylate in water.
The solution was dissolved in 1000 g, and the pH was adjusted to 4.6 with sodium hydroxide to obtain a treatment solution. Comparative Example 1 50g of potassium inositohexaphosphate was added to water.
The solution was dissolved in 1000 g, and the pH was adjusted to 4.4 with potassium hydroxide to obtain a treatment solution. Comparative Example 2 100 g of nickel inositohexaphosphate and 20 g of sodium polyacrylate were dissolved in 1000 g of water, and the pH was adjusted to 4.4 with sodium hydroxide to prepare a treatment liquid. Comparative Example 3 Inositohexaphosphate/potassium carbonate (mole ratio 1/0.1) 50g, inositohexaphosphate/nickel carbonate (mole ratio 1/0.1)
Dissolve 50g in 1000g of water and adjust the pH with potassium hydroxide.
The treatment solution was adjusted to 4.4. Next, an image is formed on a commercially available electrophotographic material containing a zinc oxide/resin dispersion system by a conventional method, and each of the above-mentioned processing solutions is put into an automatic etching device (Ricoh Processor) to form a photosensitive layer. was etched to prepare an offset printing original plate, and printing was performed using a 5-fold dilution of each treatment solution as a dampening solution. The results are shown in the table.
【表】
上記の如く、実施例１〜２はいずれも10000枚
の印刷でマスター版および印刷物に地汚れは全く
なく、インキ着肉性の良好な印刷物が得られた。
しかし比較例１〜３はインキ分離性が悪く、100
枚以上の印刷は不可能であつた。[Table] As described above, in each of Examples 1 and 2, there was no scumming on the master plate or printed matter after 10,000 sheets were printed, and printed matter with good ink receptivity was obtained.
However, Comparative Examples 1 to 3 had poor ink separation, and 100
It was impossible to print more than one sheet.
Claims (1)
ウムおよび炭酸ニツケルを反応させて生成したイ
ノシツトヘキサリン酸カリウム塩およびイノシツ
トヘキサリン酸ニツケル塩の混合物にヘキサソジ
ウムトリエチレンテトラミンヘキサアセテートと
ポリアクリル酸ナトリウムを含有することを特徴
とする不感脂化処理液。 ２ イノシツトヘキサリン酸エステルと炭酸カリ
ウムとのモル比が１：0.05〜１のイノシツトヘキ
サリン酸カリウム塩と、イノシツトヘキサリン酸
エステルと炭酸ニツケルとのモル比が１：0.01〜
0.5のイノシツトヘキサリン酸ニツケル塩との混
合物を含有することを特徴とする特許請求の範囲
第１項記載の不感脂化処理液。[Scope of Claims] 1 Hexasodium triethylenetetramine hexane is added to a mixture of potassium inositohexaphosphate and nickel inositohexaphosphate produced by reacting inositohexaphosphate with potassium carbonate and nickel carbonate. A desensitizing liquid characterized by containing acetate and sodium polyacrylate. 2 Potassium inositohexaphosphate salt with a molar ratio of inositohexaphosphate to potassium carbonate of 1:0.05 to 1, and a molar ratio of inositohexaphosphate to nickel carbonate of 1:0.01 to 1.
The desensitizing treatment liquid according to claim 1, characterized in that it contains a mixture of 0.5% and nickel inositohexaphosphate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7340782A JPS58191196A (en) | 1982-05-04 | 1982-05-04 | Desensitizing liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7340782A JPS58191196A (en) | 1982-05-04 | 1982-05-04 | Desensitizing liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58191196A JPS58191196A (en) | 1983-11-08 |
| JPH0256234B2 true JPH0256234B2 (en) | 1990-11-29 |
Family
ID=13517304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7340782A Granted JPS58191196A (en) | 1982-05-04 | 1982-05-04 | Desensitizing liquid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58191196A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6144697A (en) * | 1984-08-10 | 1986-03-04 | Mitsubishi Paper Mills Ltd | Direct drawing type offset printing plate |
| US5565290A (en) * | 1991-07-30 | 1996-10-15 | Fuji Photo Film Co., Ltd. | Desensitizing solution for offset printing |
-
1982
- 1982-05-04 JP JP7340782A patent/JPS58191196A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58191196A (en) | 1983-11-08 |
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