Dry planographic printing plate

Claim 2

A DRY PLANOGRAPHIC PRINTING PLATE COMPRISING A SUPPORT WITH A SURFACE HAVING A. A PRINTING PORTION RECEPTIVE TO PRINTING INK, AND B. A NONPRINTING PORTION WHICH REPELS PRINING INK, THE NONPRINTING PORTION SELECTED FROM THE GROUP CONSISTING OF I. A FLUORINE-CONTAINING COMPOUND HAVING AFLUORINSTED RADICAL AT ONE END, AND A POLAR RADICAL AT THE OTHER END, AND II. A FLUORINE-CONTAINING COMPOUND THAT IS A POLYMER OF A COMPOUND HAVING A FLUORINATED RADICAL LINKED TO A RADICAL HAVING A POLYMERIZABLE CARBON-TO-CARBON LINKAGE, THE NONPRINTING PORTION OF THE PLATE BEING CHARACTERIZED BY A CRITICAL SURFACE TENSION AT 25*C. OF UP TO ABOUT 15.4 DYNES/CM. AS DETERMINED BY ADVANCING CONTACT ANGLES AND UP TO ABUT 16.1 DYNES/CM. AS DETERMINED BY RECEDING CONTACT ANGLES THE ADVANCING AND RECEDING CONTACT ANGLES DETERMINED, RESPECTIVELY, BY OBSERVING AN EXPANDING AND CONTRACTING DROP OF AN N-ALKANETEST LIQUID ON THE NON-PRINTING PAORTION OF THE PLATE.

Claim 3

A printing plate according to claim 1 wherein the nonprinting portion of the surface is a fluorine-containing compound having a fluorinated radical at one end and a polar radical at the other end.

Claim 4

A printing plate according to claim 2 wherein the fluroine-containing compound is (F(CF2)f(CH2)gO)mP(O)(OH)3 m where f is 6, 8, 10 or 12, where g is 1 to 12 and m is 1 to 2, or mixtures thereof.

Claim 5

A printing plate according to claim 2 wherein the fluorine-containing compound is a hydrolysis product of

Claim 6

A printing plate according to claim 4 wherein the fluorine-containing compound has been hydrolyzed in place on the support.

Claim 7

A printing plate according to claim 1 wherein the nonprinting portion of the surface is a fluorine-containing polymer of a compound having a fluorinated radical linked to a radical having a polymerizable carbon-to-carbon linkage.

Claim 8

A printing plate according to claim 6 wherein the polymer is derived from a monomer having the formula CF3(CF2)6CONHCH2CH2SCOC(CH3) CH2.

Claim 9

A printing plate according to claim 6 wherein the polymer is derived from

Claim 10

A printing plate according to claim 6 wherein the polymer is derived from a monomer having the formula F(CF2)6CH2CH2CH(CH2O2CCH CH2)2.

Claim 11

A printing plate according to claim 6 wherein the polymer is derived from CmF2m 1(CH2)p-O-X, H(CF2)n-CH2-OX, or CH3(CF2)q(CH2)r-O-X, wherein m is 4 to 14, p is 1 to 12, r is 1 to 2, h is 8 to 14, q is 9 to 13 and X is -COCH CH2, or, -COC(CH3) CH2.

Claim 12

A printing plate according to claim 6 wherein the polymer is derived from

Claim 13

A printing plate according to claim 6 wherein the polymer is derived from

Claim 14

A printing plate according to claim 1 wherein the nonprinting portion is an overlay on at least a part of the printing portion.

Claim 15

A printing plate according to claim 13 wherein the printing portion is the support.

Claim 16

A printing plate according to claim 13 wherein the printing portion is an overlay on the support.

Claim 17

A printing plate according to claim 1 wherein the printing portion is an overlay on at least a part of the nonprinting portion.

Claim 18

A printing plate according to claim 1 wherein both the printing and the nonprinting portions of the surface are overlays on the surface of the support.

Claim 19

A printing plate according to claim 1 wherein the critical surface tension is up to about 10 dynes/cm. as determined by both advancing and receding contact angles.

Claim 20

A printing plate according to claim 1 wherein the printing portion of the surface has a critical surface tension determined by advancing contact angles of at least 30 dynes/cm. at 20*C.

Claim 21

A printing plate according to claim 19 wherein the printing portion of the surface has a critical surface tension determined by advancing contact angles of at least 40 dynes/cm. at 20*C.

Claim 22

A printing plate according to claim 20 wherein the printing portion of the surface is nylon or aluminum.

Claim 23

A printing plate according to claim 21 wherein the printing portion of the surface is aluminum.

Claim 24

A printing plate according to claim 1 wherein at least one of the printing or nonprinting portions of the surface is a photopolymerization product.

Claim 25

A process for making a planographic printing plate comprising A. treating the surface of a photoexposed but undeveloped lithographic plate having ink-receptive areas of photoconverted photosensitive composition and areas of unconverted photosensitive composition, with a liquid which i. is a solvent for and capable of removing the unconverted photosensitive composition, ii. is nonswelling and a nonsolvent for the ink-receptive photoconverted photosensitive composition, and iii. has dissolved therein the ink-rejecting fluorine-containing compound selected from the group consisting of a. a fluorine-containing compound having a fluorinated radical at one end, and a polar radical at the other end, and b. a fluorine-containing compound that is a polymer of a compound having a fluorinated radical linked to a radical having a polymerizable carbon-to-carbon linkage, and B. removing the liquid of (A) and with it the unconverted photosensitive composition from the surface leaving behind on the areas where the unconverted composition had been, a sufficient residue of the fluorine-containing compound to impart ink-repellency to those areas when dry.

Claim 26

A process for making a planographic printing plate comprising A. treating the surface of a photoexposed but undeveloped lithographic plate having ink-receptive areas of photoconverted photosensitive composition and areas of unconverted photosensitive composition, with a liquid which i. is a solvent for and capable of removing the unconverted photosensitive composition, ii. is nonswelling and a nonsolvent for the ink-receptive photoconverted photosensitive composition, and iii. has dissolved therein the ink-rejecting fluorine-containing compound selected from the group consisting of a. a fluorine-containing compound having a fluorinated radical at one end, and a polar radical at the other end, and b. a fluorine-containing compound that is a polymer of a compound having a fluorinated radical linked to a radical having a polymerizable carbon-to-carbon linkage, and B. removing the liquid of (A) and with it the unconverted photosensitive composition from the surface leaving behind on the areas where the unconverted composition had been, a sufficient residue of the fluorine-containing compound to impart ink-repellency to those areas when dry.

Claim 27

A process for making a planographic printing plate comprising A. coating the surface of a lithographic plate having inherently ink-receptive portions and portions which are ink-receptive when dry but ink-rejecting when wet by a fountain fluid, when a layer of the ink-repellent fluorine-containing compound selected from the group consisting of a. a fluorine-containing compound having a fluorinated radical at one end, and a polar radical at the other end, and b. a fluorine-containing compound that is a polymer of a compound having a fluorinated radical linked to a radical having a polymerizable carbon-to-carbon linkage, and B. treating the coated surface with a liquid which is i. a solvent for and capable of removing the inherently ink-receptive portion of the lithographic plate surface beneath the coating, and ii. a nonsolvent for the ink-repellent fluorinated composition, and C. removing the liquid of (B) from the surface and with it the inherently ink-receptive portions of the lithographic plate beneath the coating and the fluorine-containing compound coating over the inherently ink-receptive portions leaving behind uncoated portions of lithographic plate which are ink-receptive.

Claim 28

A process for making a planographic printing plate comprising A. coating the surface of a lithographic plate having inherently ink-receptive portions and portions which are ink-receptive when dry but ink-rejecting when wet by a fountain fluid, when a layer of the ink-repellent fluorine-containing compound selected from the group consisting of a. a fluorine-containing compound having a fluorinated radical at one end, and a polar radical at the other end, and b. a fluorine-containing compound that is a polymer of a compound having a fluorinated radical linked to a radical having a polymerizable carbon-to-carbon linkage, and B. treating the coated surface with a liquid which is i. a solvent for and capable of removing the inherently ink-receptive portion of the lithographic plate surface beneath the coating, and ii. a nonsolvent for the ink-repellent fluorinated composition, and C. removing the liquid of (B) from the surface and with it the inherently ink-receptive portions of the lithographic plate beneath the coating and the fluorine-containing compound coating over the inherently ink-receptive portions leaving behind uncoated portions of lithographic plate which are ink-receptive.

Claim 29

A process for making a planographic printing plate comprising A. coating an ink-receptive surface with a coating of the photopolymerizable fluorine-containing compound selected from the group consisting of a. a fluorine-containing compound having a fluorinated radical at one end, and a polar radical at the other end, and b. a fluorine-containing compound that is a polymer of a compound having a fluorinated radical linked to a radical having a polymerizable carbon-to-carbon linkage, and B. photopolymerizing a portion of said coating thereby converting it into a polymer, and C. removing the unpolymerized fluorine-containing composition.

Claim 30

A process for making a planographic printing plate comprising A. coating an ink-receptive surface with a coating of the photopolymerizable fluorine-containing compound selected from the group consisting of a. a fluorine-containing compound having a fluorinated radical at one end, and a polar radical at the other end, and b. a fluorine-containing compound that is a polymer of a compound having a fluorinated radical linked to a radical having a polymerizable carbon-to-carbon linkage, and B. photopolymerizing a portion of said coating thereby converting it into a polymer, and C. removing the unpolymerized fluorine-containing composition.

Claim 31

A process according to claim 26 wherein the unpolymerized fluorine-containing composition is removed by volatilizing.

Claim 32

A process for printing with a planographic printing plate according to claim 1, comprising inking the plate while it bears no fountain solution and transferring the pattern of ink received on the plate to a surface to be printed.