Abstract: Methacrylate (co)polymers containing carbazolyl side groups contain or are composed of repeating units of the general formula (I) ##STR1## where m is an integer of from 3 to 11. The novel methacrylate (co)polymers containing carbazolyl side groups can advantageously be used as photoconductors in photoconductive layers, in particular of electrophotographic recording elements.

Abstract: Methacrylate (co)polymers containing carbazolyl side groups contain or are composed of repeating units of the general formula (I) ##STR1## where m is an integer of from 3 to 11. The novel methacrylate (co)polymers containing carbazolyl side groups can advantageously be used as photoconductors in photoconductive layers, in particular of electrophotographic recording elements.

Abstract: Novel 2-[(meth)acrylamidomethyl]-1,3-diketones have the general formula (I) ##STR1## where R is hydrogen or methyl,R.sup.1 is hydrogen, methyl or ethyl,R.sup.2 and R.sup.3 are each alkyl of from 1 to 6 carbon atoms or unsubstituted or substituted aryl of from 6 to 20 carbon atoms, R.sup.2 and R.sup.3 being identical to or different from each other.

Abstract: Novel 2-[(meth)acrylamidomethyl]-1,3-diketones have the general formula (I) ##STR1## where R is hydrogen or methyl,R.sup.1 is hydrogen, methyl or ethyl,R.sup.2 and R.sup.3 are each alkyl of from 1 to 6 carbon atoms or unsubstituted or substituted aryl of from 6 to 20 carbon atoms, R.sup.2 and R.sup.3 being identical to or different from each other.

Abstract: Novel 4-[(meth)acrylamidomethyl]-pyrazoles and -isoxazoles of the general formula ##STR1## where R is hydrogen or methyl, R.sup.1 is hydrogen, methyl or ethyl, R.sup.2 and R.sup.3 may be identical or different and are each alkyl of 1 to 6 carbon atoms or unsubstituted or substituted aryl of 6 to 20 carbon atoms, and X is oxygen or an NR.sup.4 group where R.sup.4 is hydrogen or a radical having the meanings of R.sup.2 or R.sup.3, a process for their preparation, and the use of these compounds in particular for polymerization and the preparation of homopolymers and copolymers, are described.

Abstract: The surface of plates, foils or ribbons consisting of aluminum or aluminum alloys are anodically oxidized in an aqueous electrolyte as the anodizing bath by a process in which the electrolyte used may contain organic and inorganic acids together with further additives. The aqueous electrolyte must contain one or more silanes I of the formula IX--(CH.sub.2).sub.y --Si(R.sup.1).sub.n (OR.sup.2).sub.3-n Iwhere y is an integer from 1 to 4, n, independently of y, is 0, 1 or 2, R.sup.1 and R.sup.2 are each C.sub.1 -C.sub.9 -alkyl or C.sub.6 -C.sub.12 -aryl, X is selected from X.sup.1 to X.sup.11 ##STR1## where R.sup.3 is hydrogen, C.sub.1 -C.sub.9 -alkyl, an alkanecarboxylic acid group of 1 to 9 carbon atoms or a carboxylic anhydride ring obtained by reacting one of the said alkanecarboxylic acid groups of 1 to 9 carbon atoms with the methylenecarboxylic acid group ##STR2## bonded to R.sup.3, R.sup.4 and R.sup.5 are each C.sub.1 -C.sub.9 -alkyl or C.sub.6 -C.sub.12 -aryl, R.sup.6 is hydrogen, C.sub.1 -C.sub.

Abstract: Novel 4-[(meth)acrylamidomethyl]-pyrazoles and -isoxazoles of the general formula ##STR1## where R is hydrogen or methyl, R.sup.1 is hydrogen, methyl or ethyl, R.sup.2 and R.sup.3 may be identical or different and are each alkyl of 1 to 6 carbon atoms or unsubstituted or substituted aryl of 6 to 20 carbon atoms, and X is oxygen or an NR.sup.4 group where R.sup.4 is hydrogen or a radical having the meanings of R.sup.2 or R.sup.3, a process for their preparation, and the use of these compounds in particular for polymerization and the preparation of homopolymers and copolymers, are described.

Abstract: A sensitized lithographic printing plate is produced from an aluminum base which has been mechanically, chemically and/or electrochemically pretreated and anodically oxidized in a conventional manner and a photosensitive copying layer which is applied to this base, by a process in which a thin layer which imparts hydrophilic properties and consists of a hydrolysis product or condensate of one or more silanes is applied between the base and the copying layer.These lithographic printing plates are particularly useful for offset printing.

Abstract: An electrophotographic recording element consisting of an aluminum base, which is mechanically, chemically and/or electrochemically pretreated in a conventional manner, and a photoconductive layer which is applied to this base is produced by a process in which a thin layer which imparts hydrophilic properties and consists of a hydrolysis product or condensate of a silane is applied between the base and the photoconductive layer.These recording elements are particularly useful for electrophotographic offset printing.