US5166025A — Matric plate for electrophotographic platemaking,…

Claim 1

Independent Claim 143 words

An electrophotographic plate-making quality matrix plate provided on an electroconductive substrate thereof with a photosensitive layer formed of an alkali-soluble binder resin containing an organic photoelectroconductive compound, which matrix plate is characterized by the fact that said organic photoelectroconductive compound is a zinc phthalocyanine represented by the general formula I: ##STR10## wherein R is a --SZ group (where Z is a phenyl group, a phenyl group substituted with an alkyl group of 1 to 5 carbon atoms, or a naphthyl group), and said binder resin is a copolymer obtained by polymerizing a monomer mixture comprising (a) at least one compound selected from the group consisting of hydroxyalkyl acrylates and hydroxyalkyl methacrylates, (b) at least one copolymerizable unsaturated carboxylic acid, (c) at least one styrene compound, and (d) at least one compound selected from among acrylic esters other than said hydroxyalkyl acrylates of (a).

Claim 2

Dependent Claim 143 words

An electrophotographic plate-making quality matrix plate provided on an electroconductive substrate thereof with a photosensitive layer formed of an alkali-soluble binder resin containing an organic photoelectroconductive compound, which matrix plate is characterized by the fact that said organic photoelectroconductive compound is a zinc phthalocyanine represented by the general formula I: ##STR10## wherein R is a --SZ group (where Z is a phenyl group, a phenyl group substituted with an alkyl group of 1 to 5 carbon atoms, or a naphthyl group), and said binder resin is a copolymer obtained by polymerizing a monomer mixture comprising (a) at least one compound selected from the group consisting of hydroxyalkyl acrylates and hydroxyalkyl methacrylates, (b) at least one copolymerizable unsaturated carboxylic acid, (c) at least one styrene compound, and (d) at least one compound selected from among acrylic esters other than said hydroxyalkyl acrylates of (a).

Claim 3

Dependent Claim 30 words

An electrophotographic plate-making matrix plate according to claim 1, wherein said monomer mixture comprises at least one compound selected from among methacrylic esters other than said hydroxyalkyl methacrylates of (a).

Claim 4

Dependent Claim 191 words

An electrophotographic plate-making matrix plate according to claim 2, wherein said binder resin is a copolymer of a number average molecular weight in the range of 1,000 to 50,000 obtained by the polymerization of a monomer mixture composed of (a) 0.5 to 40% by weight of at least one compound selected from the group consisting of hydroxyalkyl acrylates and hydroxyalkyl methacrylates having alkyl groups of 2 to 10 carbon atoms, (b) 10 to 40% by weight of at least one copolymerizable carboxylic acid selected from the group consisting of acrylic acid, methacrylic acid, and itaconic acid, (c) 10 to 70% by weight of at least one styrene compound, (d) 5 to 50% by weight of at least one acrylic ester selected from the group consisting of alkyl acrylates having alkyl groups of 1 to 12 carbon atoms and cycloalkyl acrylates having cycloalkyl groups of 5 to 7 carbon atoms, and (e) 0 to 40% by weight of at least one methacrylic ester selected from the group consisting of alkyl methacrylates having alkyl groups of 1 to 12 carbon atoms and cycloalkyl methacrylates having cycloalkyl groups of 5 to 7 carbon atoms.

Claim 5

Dependent Claim 28 words

An electrophotographic plate-making matrix plate according to any of claims 1 to 3, wherein said photosensitive layer to be used as charged to positive polarity contains a sensitizer.

Claim 6

Dependent Claim 110 words

An electrophotographic plate-making matrix plate according to claim 4, wherein said sensitizer is at least one compound selected from the group consisting of the compounds represented by the following general formulas, III, IV, and V, succinic anhydride, and maleic anhydride: ##STR11## wherein X 1 to X 5 are, either equally or unequally, each hydrogen atom, fluorine atom, --COOH group, or --NO 2 group, ##STR12## wherein Y 1 to Y 4 are, either equally or unequally, each hydrogen atom, fluorine atom, --COOH group, or --NO 2 group, and ##STR13## wherein Z 1 and Z 2 are, either equally or unequally, each hydrogen atom, fluorine atom, --COOH group, or --NO 2 group.

Claim 7

Dependent Claim 46 words

An electrophotographic plate-making matrix plate according to any of claims 1 to 3, wherein said photosensitive layer to be used as charged to negative polarity contains at least one charge transferring substance selected from among oxazole derivatives, oxadiazole derivatives, pyrazoline derivatives, hydrazone derivatives, and triphenylamine derivatives.

Claim 8

Dependent Claim 73 words

An electrophotographic plate-making matrix plate according to claim 6, wherein said charge transferring substance is represented by the following general formula VI: ##STR14## wherein R 1 and R 2 are each is an aryl group or an aralkyl group and R 3 is hydrogen atom, an alkyl group of 1 to 4 carbon atoms, a benzyl group, an alkoxy group of 1 to 4 carbon atoms, a phenoxy group, or a benzyloxy group.

Claim 9

Dependent Claim 28 words

An electrophotographic plate-making matrix plate according to any of claims 1 to 3, wherein said photosensitive layer to be used as charged to negative polarity contains aminotriazine resin.

Claim 10

Dependent Claim 37 words

An electrophotographic plate-making matrix plate according to claim 8, wherein said aminotriazine resin is at least one member selected from the group consisting of benzoguanamine resin compositions, cyclohexylcarboguanamine resin compositions, melamine resin compositions, and acetoguanamine resin compositions.

Claim 11

Dependent Claim 31 words

An electrophotographic plate-making matrix plate according to claim 8, wherein said aminotriazine resin and a composition thereof are respectively the condensate of oxymethylated aminotriazine and the condensate of alkylether oxymethylated aminotriazine.

Claim 12

Independent Claim 151 words

An method for preparing an electrophotographic plate-making quality matrix plate which comprises coating on an electroconductive substrate thereof with a photosensitive layer formed of an alkali-soluble binder resin containing a photoelectroconductive organic compound is characterized by the fact that said photoelectroconductive organic compound is a zinc phthalocyanine represented by the general formula I: ##STR15## wherein R is a --SZ group (where Z is a phenyl group, a phenyl group substituted with an alkyl group of 1 to 5 carbon atoms, or a naphthyl group), and said binder resin is a copolymer obtained by polymerizing a monomer mixture comprising (a) at least one compound selected from the group consisting of hydroxyalkyl acrylates and hydroxyalkyl methacrylates, (b) at least one copolymerizable unsaturated carboxylic acid, (c) at least one styrene compound, and (d) at least one compound selected from among acrylic esters other than said hydroxyalkyl acrylates of (a) and heat-treating said coated substrate.

Claim 13

Independent Claim 151 words

An method for preparing an electrophotographic plate-making quality matrix plate which comprises coating on an electroconductive substrate thereof with a photosensitive layer formed of an alkali-soluble binder resin containing a photoelectroconductive organic compound is characterized by the fact that said photoelectroconductive organic compound is a zinc phthalocyanine represented by the general formula I: ##STR15## wherein R is a --SZ group (where Z is a phenyl group, a phenyl group substituted with an alkyl group of 1 to 5 carbon atoms, or a naphthyl group), and said binder resin is a copolymer obtained by polymerizing a monomer mixture comprising (a) at least one compound selected from the group consisting of hydroxyalkyl acrylates and hydroxyalkyl methacrylates, (b) at least one copolymerizable unsaturated carboxylic acid, (c) at least one styrene compound, and (d) at least one compound selected from among acrylic esters other than said hydroxyalkyl acrylates of (a) and heat-treating said coated substrate.

Claim 14

Dependent Claim 23 words

A method according to claim 11, wherein said heat-treatment is carried out at a temperature in the range of 100° to 160° C.

Claim 15

Dependent Claim 27 words

A method according to claim 11, wherein said monomer mixture comprises at least one compound selected from among methacrylic esters other than said hydroxyalkyl methacrylates of (a).

Claim 16

Dependent Claim 188 words

A method according to claim 13, wherein said binder resin is a copolymer of a number average molecular weight in the range of 1,000 to 50,000 obtained by the polymerization of a monomer mixture composed of (a) 0.5 to 40% by weight of at least one compound selected from the group consisting of hydroxyalkyl acrylates and hydroxyalkyl methacrylates having alkyl groups of 2 to 10 carbon atoms, (b) 10 to 40% by weight of at least one copolymerizable carboxylic acid selected from the group consisting of acrylic acid, methacrylic acid, and itaconic acid, (c) 10 to 70% by weight of at least one styrene compound, (d) 5 to 50% by weight of at least one acrylic ester selected from the group consisting of alkyl acrylates having alkyl groups of 1 to 12 carbon atoms and cycloalkyl acrylates having cycloalkyl groups of 5 to 7 carbon atoms, and (e) 0 to 40% by weight of at least one methacrylic ester selected from the group consisting of alkyl methacrylates having alkyl groups of 1 to 12 carbon atoms and cycloalkyl methacrylates having cycloalkyl groups of 5 to 7 carbon atoms.

Claim 17

Independent Claim 25 words

A method according to any of claims 11 to 14, wherein said photosensitive layer to be used as charged to positive polarity contains a sensitizer.

Claim 18

Dependent Claim 107 words

A method according to claim 15, wherein said sensitizer is at least one compound selected from the group consisting of the compounds represented by the following general formulas, III, IV, and V, succinic anhydride, and maleic anhydride: ##STR16## wherein X 1 to X 5 are, either equally or unequally, each hydrogen atom, fluorine atom, --COOH group, or --NO 2 group, ##STR17## wherein Y 1 to Y 4 are, either equally or unequally, each hydrogen atom, fluorine atom, --COOH group, or --NO 2 group, and ##STR18## wherein Z 1 and Z 2 are, either equally or unequally, each hydrogen atom, fluorine atom, --COOH group, or --NO 2 group.

Claim 19

Independent Claim 43 words

A method according to any of claims 11 to 14, wherein said photosensitive layer to be used as charged to negative polarity contains at least one charge transferring substance selected from among oxazole derivatives, oxadiazole derivatives, pyrazoline derivatives, hydrazone derivatives, and triphenylamine derivatives.

Claim 20

Dependent Claim 70 words

A method according to claim 17, wherein said charge transferring substance is represented by the following general formula VI: ##STR19## wherein R 1 and R 2 are each is an aryl group or an aralkyl group and R 3 is hydrogen atom, an alkyl group of 1 to 4 carbon atoms, a benzyl group, an alkoxy group of 1 to 4 carbon atoms, a phenoxy group, or a benzyloxy group.

Claim 21

Independent Claim 25 words

A method according to any of claims 11 to 14, wherein said photosensitive layer to be used as charged to negative polarity contains aminotriazine resin.

Claim 22

Dependent Claim 34 words

A method according to claim 19, wherein said aminotriazine resin is at least one member selected from the group consisting of benzoguanamine resin compositions, cyclohexylcarboguanamine resin compositions, melamine resin compositions, and acetoguanamine resin compositions.

Claim 23

Dependent Claim 28 words

A method according to claim 19, wherein said aminotriazine resin and a composition thereof are respectively the condensate of oxymethylated aminotriazine and the condensate of alkylether oxymethylated aminotriazine.

Claim 24

Dependent Claim 48 words

A lithographic printing plate obtained by forming a toner image by the electrophotographic process on an electrophotographic plate-making quality matrix plate according to any of claims 1 to 10, fixing said toner image, and then removing the non-image part of said toner image with an alkaline etching liquid.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1995-11-24	1996-05-25	1996-11-24	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1999-11-24	2000-05-25	2000-11-24	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2003-11-24	2004-05-25	2004-11-24	$7700.00	Window Closed / Lapsed

Matric plate for electrophotographic platemaking, production thereof and printing plate

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