Abstract: A support material for photosensitive substances, useful in the production of offset-printing plates, is disclosed. The support material comprises mechanically, chemically or electrochemically roughened aluminum or an aluminum alloy in the form of a sheet, a foil or a web, and which is coated on at least one side with a hydrophilic polymer which comprises (a) at least 2 mol% of units having acidic side groups and (b) at least 2 mol% of units having basic side groups which are capable of being protonated.

Abstract: The invention relates to a hydrophilic copolymer having the general structure:. . . --(A).sub.m -- . . . --(B).sub.n -- . . . --(C).sub.o -- . . . --(D).sub.p -- . . .in whichA is at least one polymerizable monomer having an acidic side group,B is at least one polymerizable monomer having a basic side group,C is at least one polymerizable monomer having a non-polar, non-hydrophilic side group, andD is at least one polymerizable monomer capable of increasing the hydrophilic character of monomer A or to form a chelate with monomer A,m, n, o and p are the monomer contents of monomers A, B, C and D, respectively, in mol %, with m+n+o+p=100 mol %, with the proviso that m and n are each.gtoreq.2 mol % and p is .gtoreq.1 mol %,wherein the copolymer is a linear copolymer having a random structure of the monomers. The copolymer is useful as a hydrophilizing agent for lithographic and offset printing plates, and as a binder in light-sensitive lithographic layers.

Abstract: The invention relates to a hydrophilic copolymer having the general structure: ##STR1## in which R.sup.1 denotes H, CH.sub.3 or C.sub.2 H.sub.5,R.sup.2 denotes an alkyl or cycloalkyl radical having 1 to 17 carbon atoms,R.sup.3 denotes CH.sub.3, C.sub.2 H.sub.5 or C.sub.3 H.sub.7,m is 2, 3 or 4 andn, o, p denote the fractions of the monomer units having acidic side groups, neutral, non-ionizable monomer units and monomer units having basic side groups respectively, in mol %, with n+o+p =100 mol %, with the proviso that n and p are each .gtoreq.5 mol %,wherein the copolymer is a linear copolymer having a random structure of monomer units. The copolymer is useful as a hydrophilizing agent for lithographic and offset printing plates.

Abstract: The invention relates to a hydrophilic copolymer having the general structure: ##STR1## in which R.sup.1 denotes H, CH.sub.3 or C.sub.2 H.sub.5,R.sup.2 denotes an alkyl or cycloalkyl radical having 1 to 17 carbon atoms,R.sup.3 denotes CH.sub.3, C.sub.2 H.sub.5 or C.sub.3 H.sub.7,m is 2, 3 or 4 andn, o, p denote the fractions of the monomer units having acidic side groups, neutral, non-ionizable monomer units and monomer units having basic side groups respectively, in mol %, with n+o+p=100 mol %, with the proviso that n and p are each .gtoreq.2 mol %,wherein the copolymer is a linear copolymer having a random structure of monomer units. The copolymer is useful as a hydrophilizing agent for lithographic and offset printing plates.

Abstract: The invention relates to a thermally crosslinkable hydrophilic copolymer have the general structure:. . . --(A).sub.m --. . . --(B).sub.n --. . . --(C).sub.o --. . . --(D).sub.p --. . .in whichA is at least one polymerizable monomer having an acidic side group,B is at least one polymerizable monomer having a basic side group,C is at least one polymerizable monomer having a non-polar, non-hydrophilic side group, andD is N-butoxymethylmethacrylamide,m, n, o and p are the monomer contents of monomers A, B, C and D, respectively, in mol %, with m+n +o+p=100 mol %, with the proviso that the sum of m+n=about 5 to 90 mol %, m and n are each .gtoreq.2 mol % and p is .gtoreq.1 mol %,wherein the copolymer is a linear copolymer having a random structure of the monomers. The copolymer is useful as a hydrophilizing agent for lithographic and offset printing plates.

Abstract: This invention relates to an improvement in a photochemical process for the preparation of printing plates wherein a printing plate comprising a photosensitive composition coated on a support is exposed to a pattern of laser light, the intensity of which is modulated in accordance with an input source of information and said printing plate is subsequently developed by removal from said support of that portion of the photosensitive coating composition which is not exposed to said pattern of laser light, the improvement comprising utilizing a pattern of laser light generated by a laser at a wavelength greater than about 450 nm, and utilizing as a photosensitive composition a negative-working condensate of a para-aminobenzene diazonium compound, said compound being present in a quality of at least 25% of the total coating weight.

Abstract: This invention relates to a light-sensitive transfer material, comprising a flexible temporary support and a thermoplastic photopolymerizable layer which layer comprises a polymeric, thermoplastic binder which is soluble or at least swellable in aqueous-alkaline solutions, a polyurethane with two terminal acrylic acid or methacrylic acid ester groups which is capable of addition polymerization, and a photoinitiator, the polyurethane corresponding to Formula I ##STR1## wherein --X-- is one of the groups ##STR2## --C.sub.k H.sub.2k --O-- and --C.sub.r H.sub.2r-2 --O-- Y is a saturated aliphatic or cycloaliphatic group with 2 to 12 carbon atoms, andZ ##STR3## and wherein R.sub.1, R.sub.2 and R.sub.3 are hydrogen atoms or methyl groups,n is a whole number from 2 to 15,m is a whole number from 2 to 4,p is a whole number from 1 to 4,k is a whole number from 2 to 12, andr is a whole number from 4 to 12.

Abstract: This invention relates to a photopolymerizable mixture comprising a polymeric binder which is soluble or at least swellable in aqueous-alkaline solutions, a photoinitiator, and a polyurethane with two terminal acrylic acid or methacrylic acid ester groups which is capable of addition polymerization, and corresponds to the following general Formula I ##STR1## wherein --X-- is one of the groups ##STR2## --C.sub.k H.sub.2k --O-- and --C.sub.r H.sub.2r-2 --O--,Y is a saturated aliphatic or cycloaliphatic group with 2 to 12 carbon atoms, andZ is ##STR3## and wherein R.sub.1, R.sub.2, and R.sub.3 are hydrogen atoms or methyl groups,n is a whole number from 2 to 15,m is a whole number from 2 to 4,p is a whole number from 1 to 4,k is a whole number from 2 to 12, andr is a whole number from 4 to 12.The invention also relates to a light-sensitive transfer material employing the photopolymerizable mixture.

Abstract: This invention relates to a photopolymerizable mixture comprising a polymeric binder which is soluble or swellable in aqueous-alkaline solutions, a photoinitiator, a compound with at least two terminal acrylic or methacrylic acid ester groups and a boiling point above 100.degree. C. which is capable of addition polymerization, and a polyurethane corresponding to the following Formula I ##STR1## wherein --X-- is one of the following groups: ##STR2## Y is a saturated aliphatic or cycloaliphatic group with 2 to 12 carbon atoms,Z is ##STR3## R.sub.1 is R.sub.4 or CONH--R.sub.4, R.sub.2 and R.sub.3 are hydrogen atoms or methyl groups,R.sub.4 is a saturated aliphatic group with 1 to 20 carbon atoms,n is zero or a whole number from 1 to 15,m is a whole number from 2 to 4,p is zero or a whole number from 1 to 4,k is a whole number from 2 to 12,r is a whole number from 4 to 12,n+p is a whole number from 1 to 19, and whereinR.sub.1 is R.sub.4 if p=0, and R.sub.1 is CONH--R.sub.4 if n=0.

Abstract: This invention relates to an improvement in a photochemical process for the preparation of printing plates wherein a printing plate comprising a photosensitive composition coated on a support is exposed to a pattern of laser light, the intensity of which light is modulated in accordance with an input source of information, and said printing plate is subsequently developed by removal from said support of that portion of the photosensitive coating composition which is not exposed to said pattern of laser light, the improvement comprising utilizing a pattern of laser light generated by a laser, and utilizing as a photosensitive composition a mixture consisting essentially of: (1) a negative-working condensate of a para-amino benzene diazonium compound present in an effective amount sufficient to sensitize said photosensitive composition to laser light, and (2) a colorant capable of absorbing light in the spectral range between about 450 -550 nm, said colorant selectively sensitizing the condensate to said laser

Abstract: This invention relates to an improvement in a photopolymerizable mixture, comprising a polymeric binder which is soluble or at least swellable in aqueous-alkaline solutions, a compound with at least two acrylic or methacrylic acid ester groups and a boiling point above 100.degree. C. which is capable of addition polymerization, a photoinitiator, and a plasticizer, the improvement being that the plasticizer is a compound corresponding to Formula I ##STR1## wherein R.sub.1 is a hydrogen or halogen atom or an alkyl group with 1 to 4 carbon atoms, R.sub.2 is a hydrogen atom, an OH group, or an alkyl group with 1 to 4 carbon atoms, R.sub.3 is a hydrogen atom or a methyl group, R.sub.4 is an alkyl or alkenyl group with 1 to 20 carbon atoms, and n is zero or a whole number from 1 to 20, and wherein R.sub.4 has at least 4 carbon atoms if n is zero or 1. The invention also relates to a light-sensitive transfer material including the photopolymerizable mixture.

Abstract: This invention relates to a photopolymerizable copying composition comprising at least one binder, at least one photoinitiator, and at least one polymerizable compound having the formula ##STR1## wherein X is a saturated hydrocarbon group having 2 to 12 carbon atoms or an arylene group having 6 to 10 carbon atoms,R.sub.1 is an alkyl group having 1 to 3 carbon atoms, R.sub.4 or --CH.sub.2 R.sub.4R.sub.2 and R.sub.3 are H, CH.sub.3, or --CH.sub.2 R.sub.4,R.sub.4 is --O--CO--CR.sub.5 .dbd.CH.sub.2R.sub.5 is H or CH.sub.3, andn and m are integers from 0 to 4,R.sub.4 being present in at least one of the groups R.sub.1, R.sub.2, and R.sub.3.