JPS6130262B2 - - Google Patents
Info
- Publication number
- JPS6130262B2 JPS6130262B2 JP7844776A JP7844776A JPS6130262B2 JP S6130262 B2 JPS6130262 B2 JP S6130262B2 JP 7844776 A JP7844776 A JP 7844776A JP 7844776 A JP7844776 A JP 7844776A JP S6130262 B2 JPS6130262 B2 JP S6130262B2
- Authority
- JP
- Japan
- Prior art keywords
- offset printing
- photoconductive layer
- electrophotographic copying
- printing plates
- melamine resin
- 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
- 229920000877 Melamine resin Polymers 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 21
- 238000007645 offset printing Methods 0.000 claims description 21
- 239000004640 Melamine resin Substances 0.000 claims description 19
- 150000007974 melamines Chemical class 0.000 claims description 13
- -1 alkyl phosphate ester Chemical class 0.000 claims description 11
- 229910019142 PO4 Inorganic materials 0.000 claims description 10
- 239000010452 phosphate Substances 0.000 claims description 10
- 230000002378 acidificating effect Effects 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 239000000049 pigment Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 238000000576 coating method Methods 0.000 description 19
- 239000011248 coating agent Substances 0.000 description 18
- 238000007639 printing Methods 0.000 description 15
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 10
- 239000011230 binding agent Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- 239000011787 zinc oxide Substances 0.000 description 5
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 239000004925 Acrylic resin Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000004816 latex Substances 0.000 description 3
- 229920000126 latex Polymers 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229920000180 alkyd Polymers 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 235000011187 glycerol Nutrition 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- 239000004254 Ammonium phosphate Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 229920003180 amino resin Polymers 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- 235000019289 ammonium phosphates Nutrition 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- QHIWVLPBUQWDMQ-UHFFFAOYSA-N butyl prop-2-enoate;methyl 2-methylprop-2-enoate;prop-2-enoic acid Chemical compound OC(=O)C=C.COC(=O)C(C)=C.CCCCOC(=O)C=C QHIWVLPBUQWDMQ-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012776 electronic material Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical compound O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000013053 water resistant agent Substances 0.000 description 1
Landscapes
- Photoreceptors In Electrophotography (AREA)
Description
【発明の詳細な説明】
本発明は、オフセツト印刷版用電子写真複写材
料において、プレコート層の主成分である親水性
結合剤と反応して架橋反応物を形成するメラミン
樹脂を含有してなる光導電層を設けたオフセツト
印刷版用電子写真複写材料に関するものである。Detailed Description of the Invention The present invention provides an electrophotographic copying material for offset printing plates containing a melamine resin that reacts with a hydrophilic binder, which is a main component of a precoat layer, to form a crosslinking reaction product. This invention relates to an electrophotographic copying material for offset printing plates provided with a conductive layer.
前記オフセツト印刷版用電子写真複写材料は導
電性支持体上に感光層を設けたもので、通常感光
層はキシレン、トルエン等の溶剤にアルキド樹
脂、シリコーン樹脂、アクリル樹脂などの適当な
絶縁性樹脂を溶解した液に、光導電性物質の酸化
亜鉛を分散し、これを裏面に導電性処理を施した
支持体上に塗布して乾燥することによつて製造さ
れる。このようにして得られるオフセツト印刷版
用電子写真複写材料は、一般の電子写真複写材料
の特性の他にオフセツト印刷版としての特性が要
求される。即ち画像形成後に非画像部を表面処理
液で不感樹脂化し、印刷中においては、複写材料
の表面を多量の処理液で湿潤する必要があるた
め、複写材料は優れた耐水性が要求されると共に
印刷中に光導電層が剥離しないこと、即ち良好な
耐刷性が要求される。 The electrophotographic copying material for offset printing plates has a photosensitive layer on a conductive support, and the photosensitive layer is usually made of a suitable insulating resin such as alkyd resin, silicone resin, or acrylic resin in a solvent such as xylene or toluene. It is manufactured by dispersing zinc oxide, a photoconductive substance, in a solution of dissolving zinc oxide, coating the dispersion on a support whose back surface has been subjected to a conductive treatment, and drying the dispersion. The thus obtained electrophotographic copying material for offset printing plates is required to have properties suitable for offset printing plates in addition to the properties of general electrophotographic copying materials. That is, after image formation, the non-image area is made into an insensitive resin with a surface treatment liquid, and during printing, the surface of the copy material must be wetted with a large amount of treatment liquid, so the copy material is required to have excellent water resistance and It is required that the photoconductive layer does not peel off during printing, that is, good printing durability is required.
従来のオフセツト印刷版用電子写真複写材料
は、光導電層の塗面強度、湿潤状態での耐剥離性
即ち耐刷性、苛酷な条件下での折曲げ耐久性、耐
水性等において必ずしもすべてを満足するものは
なかつた。このような要求される特性を付与する
ために従来から種々の提案がなされている。 Conventional electrophotographic copying materials for offset printing plates do not necessarily meet all the requirements such as coating strength of the photoconductive layer, peeling resistance in wet conditions, that is, printing durability, bending durability under harsh conditions, and water resistance. Nothing satisfied me. Various proposals have been made in the past to provide such required characteristics.
例えば、光導電層と親水性皮膜であるプレコー
ト層との間に中間層として光導電層塗工シンナー
に湿潤もしくは膨潤する合成樹脂を塗工したもの
（特公昭40−7332）、プレコート層の親水性結合剤
をアミノプラスツ初期縮合物で架橋耐水化すると
共に、プレコート層中に重合体ラテツクスを含有
せしめ耐水性、耐刷性を向上させたもの（特公昭
40−18708）などである。しかしながら、光導電
層と親水性結合剤層、即ちプレコート層との間に
中間層を設けることは塗工程上、１工程増し製造
上の不利を免れない。またプレコート層に重合体
ラテツクスを含有させたものでは、耐刷性が必ず
しも十分に得られない、等の欠点があつた。 For example, a synthetic resin that wets or swells with the photoconductive layer coating thinner is coated as an intermediate layer between the photoconductive layer and the hydrophilic precoat layer (Japanese Patent Publication No. 40-7332), and the precoat layer is hydrophilic. In addition to crosslinking the adhesive binder with an aminoplast initial condensate to make it water resistant, the precoat layer contains polymer latex to improve water resistance and printing durability (Tokuko Showa).
40-18708). However, providing an intermediate layer between the photoconductive layer and the hydrophilic binder layer, that is, the precoat layer, inevitably adds one step to the coating process, which is disadvantageous in production. In addition, when the precoat layer contains a polymer latex, there are drawbacks such as insufficient printing durability.
本発明の目的は上述の欠点を除去し耐刷性にす
ぐれたオフセツト印刷版用電子写真複写材料を提
供することにある。 An object of the present invention is to provide an electrophotographic copying material for offset printing plates which eliminates the above-mentioned drawbacks and has excellent printing durability.
更に、本発明の他の目的は、酸性アルキルリン
酸エステルを用いて再現性の良い安定した耐刷力
をもつオフセツト印刷版用電子写真複写材料を提
供することにある。 Still another object of the present invention is to provide an electrophotographic copying material for offset printing plates that uses an acidic alkyl phosphate ester and has stable printing durability with good reproducibility.
本発明の好ましい態様例としては、酸化亜鉛
100部に対して、絶縁性結着剤を15〜25部好まし
くは15〜18部、及びメラミン樹脂を0.5〜6.0部、
好ましくは1.5〜4.5部を有機溶剤に溶解し、さら
に必要に応じて酸化アルキルリン酸エステルを
0.1部以下、好ましくは0.02〜0.05部を溶解した溶
液に酸化亜鉛を分散したものをプレコート層の上
に塗布して光導電層を形成してなる。 As a preferred embodiment of the present invention, zinc oxide
To 100 parts, 15 to 25 parts of insulating binder, preferably 15 to 18 parts, and 0.5 to 6.0 parts of melamine resin.
Preferably, 1.5 to 4.5 parts are dissolved in an organic solvent, and if necessary, an alkyl oxide phosphate ester is added.
A photoconductive layer is formed by coating a precoat layer with zinc oxide dispersed in a solution containing 0.1 part or less, preferably 0.02 to 0.05 part.
本発明において、メラミン樹脂を光導電層に含
有させることによつて、プレコート層の主成分で
ある極性官能基を有する親水性結合剤及びこれを
耐水化する目的でプレコート層に含有される耐水
化剤と光導電層中のメラミン樹脂が架橋反応物を
形成し光導電層とプレコート層との間の接着を強
固にさせる効果が得られる。さらに光導電層中に
酸性アルキルリン酸エステルを含有させることに
よつてメラミン樹脂と親水性結合剤及び耐水化剤
との架橋反応を促進することが可能となり、安定
な接着強度を持つたオフセツト印刷版用電子写真
複写材料が提供される。 In the present invention, by including a melamine resin in the photoconductive layer, the hydrophilic binder having a polar functional group, which is the main component of the precoat layer, and the water resistance contained in the precoat layer for the purpose of making it waterproof. The agent and the melamine resin in the photoconductive layer form a crosslinking reaction product, resulting in the effect of strengthening the adhesion between the photoconductive layer and the precoat layer. Furthermore, by including an acidic alkyl phosphate ester in the photoconductive layer, it is possible to promote the crosslinking reaction between the melamine resin, the hydrophilic binder, and the water-resistant agent, resulting in offset printing with stable adhesive strength. A plate electrophotographic reproduction material is provided.
本発明に使用出来るメラミン樹脂の最も好まし
い例としては、溶剤タイプのメチル化メラミン樹
脂及びブチル化メラミン樹脂を挙げることが出来
る。 The most preferred examples of melamine resins that can be used in the present invention include solvent-type methylated melamine resins and butylated melamine resins.
この様なメラミン樹脂には例えば、住友化学社
製品として「スミマール40S」「スミマール55」
という商品名で、また日立化成社製品として「メ
ラン28」という商品名で市販されているものがあ
る。また、本発明に使用出来る光導電層の絶縁性
結着剤は公知のものが制限されることなく使用出
来、例えばアルキド樹脂、アクリル樹脂、等があ
る。また、本発明に使用される酸性アルキルリン
酸エステルとしては、一般式(1)で示されるものが
好ましい。 Examples of such melamine resins include "Sumimar 40S" and "Sumimar 55" manufactured by Sumitomo Chemical.
It is also commercially available under the trade name ``Melan 28'' as a product of Hitachi Chemical. Further, as the insulating binder for the photoconductive layer that can be used in the present invention, any known insulating binder can be used without limitation, such as alkyd resins, acrylic resins, and the like. Furthermore, as the acidic alkyl phosphate ester used in the present invention, those represented by general formula (1) are preferable.
式中R1及びR2はC1〜C4のアルキル基、OH基を
示す。但しR1R2が同時にOH基になることはな
い。この様な酸性アルキルリン酸エステルには、
城北化学社製品「JP504」という商品名で市販さ
れているものがある。 In the formula, R 1 and R 2 represent a C 1 to C 4 alkyl group or an OH group. However, R 1 R 2 does not become an OH group at the same time. Such acidic alkyl phosphate esters include
There is a product sold by Johoku Kagakusha under the trade name ``JP504''.
以下に本発明を実施例により詳細に説明する
が、これらに限定されるものではない。 EXAMPLES The present invention will be explained in detail by examples below, but is not limited thereto.
実施例 １
支持体として坪量100ｇ/m2の紙に下記組成の導
電層形成用塗液を支持体の裏面に乾燥塗布量が約
９ｇ/m2となるように塗布した。Example 1 A coating liquid for forming a conductive layer having the following composition was applied to the back surface of a paper having a basis weight of 100 g/m 2 as a support so that the dry coating amount was about 9 g/m 2 .
＜導電層形成用塗液＞
クレー35％水分散液 300 部
ポバール（クラレ社製PVA−117）10％水溶液
300 部
塩化ナトリウム 15 部
グリセリン ５ 部
メラミン−ホルマリン樹脂（住友化学社製スミレ
ツ613） ７ 部
硬化触媒（リン酸アンモニウム） ３ 部
酢酸ビニルラテツクス 80 部
水 160 部
ローズベンガル（増感色素） 0.1部
さらに上記導電性支持体表面に下記組成からな
るプレコート層を乾燥塗布量が７ｇ/m2となるよ
うに塗布した。<Coating liquid for forming conductive layer> Clay 35% aqueous dispersion 300 parts Poval (PVA-117 manufactured by Kuraray) 10% aqueous solution
300 parts Sodium chloride 15 parts Glycerin 5 parts Melamine-formalin resin (Sumiretsu 613 manufactured by Sumitomo Chemical) 7 parts Curing catalyst (ammonium phosphate) 3 parts Vinyl acetate latex 80 parts Water 160 parts Rose Bengal (sensitizing dye) 0.1 part Furthermore, a precoat layer having the following composition was applied to the surface of the conductive support so that the dry coating amount was 7 g/m 2 .
＜プレコート液＞
ポバール（クラレ社製PVA117）10％水溶液
300部
グリセリン ５部
メラミン−ホルムアルデヒド樹脂（住友化学社製
スミレツ613） ７部
プラスチツクピグメント（ダウケミカル社製
DPP722） 90部
水 140部
さらに、上記、導電性電子写真用紙のプレコー
ト層上に下記組成からなる光導電層を乾燥塗布量
が26ｇ/m2となる様に塗布した。<Pre-coat liquid> Poval (PVA117 manufactured by Kuraray) 10% aqueous solution
300 parts glycerin 5 parts melamine-formaldehyde resin (Sumiretsu 613 manufactured by Sumitomo Chemical Company) 7 parts plastic pigment (manufactured by Dow Chemical Company)
DPP722) 90 parts Water 140 parts Furthermore, a photoconductive layer having the following composition was coated on the precoat layer of the conductive electrophotographic paper so that the dry coating amount was 26 g/m 2 .
＜光導電層塗液＞
アクリル樹脂（固型分50％） 70 部
酸化亜鉛 200 部
ブチル化メラミン樹脂（日立化成社製メラン28）
4.5 部
酸化アルキルリン酸エステル（城北化学社製
JP504） 0.05部
キシレン 250 部
この様にして得られたオフセツト印刷版用電子
写真複写材料を周知の電子写真方法で画像形成
し、加熱定着の後、不感樹脂化液で表面処理し
た。小型オフセツト印刷機で、繰返し印刷テスト
を行い、7000枚まで印刷したが光導電層は全く破
壊されなかつた。これに対して、光導電層にブチ
ル化メラミン樹脂あるいはブチル化メラミン樹脂
と酸性アルキルリン酸エステルのいずれをも含ま
ないものでは、いずれも1000放程度の印刷で光導
電層が破壊され、版トビ現象が観察された。又、
酸性アルキルリン酸エステルを含まないもので
は、繰返し印刷テストで4000〜7000枚以上の印刷
が可能であつた。<Photoconductive layer coating liquid> Acrylic resin (solid content 50%) 70 parts Zinc oxide 200 parts Butylated melamine resin (Melan 28 manufactured by Hitachi Chemical Co., Ltd.)
4.5% alkyl phosphate ester (manufactured by Johoku Kagaku Co., Ltd.)
JP504) 0.05 parts xylene 250 parts An image was formed on the thus obtained electrophotographic copying material for an offset printing plate by a well-known electrophotographic method, and after heat fixing, the surface was treated with a desensitizing resin solution. Repeated printing tests were conducted using a small offset printing machine, and up to 7,000 sheets were printed without any damage to the photoconductive layer. On the other hand, when the photoconductive layer does not contain either a butylated melamine resin or a butylated melamine resin and an acidic alkyl phosphate ester, the photoconductive layer is destroyed after about 1000 prints, and the plate edge is phenomenon was observed. or,
In a repeat printing test, it was possible to print 4,000 to 7,000 sheets or more with a product that did not contain acidic alkyl phosphate.
実施例 ２
実施例１の導電性電子写真用紙のプレコート層
上に、実施例１のブチル化メラミン樹脂をメチル
化メラミン樹脂（住友化学社製「スミマール
40S」）2.0部に変更した他は同様の組成の光導電
層塗液を乾燥塗布量が26ｇ/m2になる様に塗布し
た。実施例１と同様の方法で印刷した結果7000枚
印刷しても光導電層の破壊は観察されなかつた。Example 2 On the precoat layer of the conductive electrophotographic paper of Example 1, the butylated melamine resin of Example 1 was coated with a methylated melamine resin (Sumimar, manufactured by Sumitomo Chemical Co., Ltd.).
A photoconductive layer coating solution having the same composition except that the amount was changed to 2.0 parts (40S) was applied so that the dry coating amount was 26 g/m 2 . As a result of printing in the same manner as in Example 1, no destruction of the photoconductive layer was observed even after printing 7000 sheets.
実施例 ３
実施例１のプレコート液の組成が、プラスチツ
クピグメントを酢酸ビニルエマルジヨン（ダイセ
ル社製セビアンA522）100部に変更した他は同様
の組成のプレコート液を乾燥塗布量が８ｇ/m2に
なる様に塗布した導電性電子写真用紙に実施例１
の光導電層液を乾燥塗布量が26ｇ/m2となる様に
塗布した。この様にして得られたオフセツト印刷
版用電子写真複写材料を実施例１と同様にして小
型オフセツト印刷機で印刷したところ5000枚印刷
しても光導電層は何ら破壊されなかつた。光導電
層にブチル化メラミン樹脂あるいはブチル化メラ
ミン樹脂と酸性アルキルリ酸エステルのいずれか
をも含まないものでは、いずれも500枚程度の印
刷で光導電層が破壊され版トビが観察された。Example 3 The composition of the pre-coat liquid in Example 1 was the same as that of Example 1 except that the plastic pigment was changed to 100 parts of vinyl acetate emulsion (Sevian A522 manufactured by Daicel), but the dry coating amount was 8 g/ m2. Example 1 on conductive electrophotographic paper coated with
The photoconductive layer solution was applied so that the dry coating amount was 26 g/m 2 . When the thus obtained electrophotographic copying material for offset printing plates was printed using a small-sized offset printing machine in the same manner as in Example 1, the photoconductive layer was not destroyed at all even after printing 5,000 copies. When the photoconductive layer did not contain either a butylated melamine resin or a butylated melamine resin and an acidic alkyl phosphate, the photoconductive layer was destroyed after about 500 sheets were printed, and plate offset was observed.
実施例 ４
実施例１のプレコート液の組成が、メラミン−
ホルムアルデヒド樹脂を変性ポリアミド−ホルマ
リン樹脂（デイツクハーキユレス社製エピノツク
スP9007Y）15部に変更した他は同様の組成のプ
レコート液を乾燥塗布量が８ｇ/m2になる様に塗
布した導電性電子写真用紙に実施例１の光導電層
液が乾燥塗布量が26ｇ/m2となる様に塗布した。
この様にして得られたオフセツト印刷版用電子写
真複写材料を用いて実施例１と同様にしたところ
10000枚印刷しても光導電層の破壊は観察されな
かつた。光導電層にブチル化メラミン樹脂あるい
はブチル化メラミン樹脂と酸可アルキルリン酸エ
ステルのいずれかをも含まない他は同様の組成の
光導電層を前記導電性電子写真用紙に乾燥塗布量
が26ｇ/m2となる様に塗布した。得られたオフセ
ツト印刷版用電子写真複写材料を印刷したとこ
ろ、いずれも1000枚程度の印刷で光導電層の破壊
が観察され版トビが見られた。Example 4 The composition of the precoat liquid of Example 1 was melamine-
A conductive electronic material was prepared by applying a pre-coating solution with the same composition to a dry coating amount of 8 g/ m2 , except that the formaldehyde resin was changed to 15 parts of modified polyamide-formalin resin (Epinox P9007Y, manufactured by Deitz Hercules). The photoconductive layer solution of Example 1 was coated on photographic paper at a dry coating weight of 26 g/m 2 .
The same procedure as in Example 1 was carried out using the thus obtained electrophotographic copying material for offset printing plates.
No destruction of the photoconductive layer was observed even after printing 10,000 sheets. A photoconductive layer having the same composition except that the photoconductive layer does not contain either a butylated melamine resin or a butylated melamine resin and an acidable alkyl phosphate ester is applied to the conductive electrophotographic paper in a dry coating amount of 26 g/ It was applied so that it was 2 m2. When the obtained electrophotographic copying materials for offset printing plates were printed, destruction of the photoconductive layer was observed after printing about 1000 sheets, and plate blanking was observed.
Claims (1)
導電層を形成してなるオフセツト印刷版用電子写
真複写材料において、上記光導電層にメラミン樹
脂を含有することを特徴とするオフセツト印刷版
用電子写真複写材料。 ２ メラミン樹脂がブチル化メラミン樹脂である
特許請求の範囲第１項記載のオフセツト印刷版用
電子写真複写材料。 ３ メラミン樹脂がメチル化メラミン樹脂である
特許請求の範囲第１項記載のオフセツト印刷版用
電子写真複写材料。 ４ 光導電層に酸性アルキルリン酸エステルを含
有させた特許請求の範囲第１項、第２項又は第３
項記載のオフセツト印刷版用電子写真複写材料。 ５ プレコート層が、プラスチツクピグメント及
び変性ポリアミド−ホルマリン樹脂を含有する特
許請求の範囲第１項、第２項、第３項又は第４項
記載のオフセツト印刷版用電子写真複写材料。[Scope of Claims] 1. An electrophotographic copying material for offset printing plates in which a photoconductive layer is formed on the surface of a conductive support via a precoat layer, characterized in that the photoconductive layer contains a melamine resin. Electrophotographic copying material for offset printing plates. 2. The electrophotographic copying material for offset printing plates according to claim 1, wherein the melamine resin is a butylated melamine resin. 3. The electrophotographic copying material for offset printing plates according to claim 1, wherein the melamine resin is a methylated melamine resin. 4 Claims 1, 2, or 3 in which the photoconductive layer contains an acidic alkyl phosphate ester
Electrophotographic copying material for offset printing plates as described in . 5. The electrophotographic copying material for offset printing plates according to claim 1, 2, 3, or 4, wherein the precoat layer contains a plastic pigment and a modified polyamide-formalin resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7844776A JPS534601A (en) | 1976-07-01 | 1976-07-01 | Electroophotographic copying material for offset printing plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7844776A JPS534601A (en) | 1976-07-01 | 1976-07-01 | Electroophotographic copying material for offset printing plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS534601A JPS534601A (en) | 1978-01-17 |
| JPS6130262B2 true JPS6130262B2 (en) | 1986-07-12 |
Family
ID=13662284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7844776A Granted JPS534601A (en) | 1976-07-01 | 1976-07-01 | Electroophotographic copying material for offset printing plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS534601A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62266568A (en) * | 1986-05-14 | 1987-11-19 | Nippon Foil Mfg Co Ltd | Aqueous solution composition for forming surface layer of lithographic printing plate |
-
1976
- 1976-07-01 JP JP7844776A patent/JPS534601A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS534601A (en) | 1978-01-17 |
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