Abstract:
This invention relates to a radiation-sensitive copying composition comprising a compound (1) which splits-off an acid upon irradiation and a compound (2) having at least one group selected from the group consisting of a carboxylic ortho acid ester group and a carboxylic acid amide acetal group, which composition, upon irradiation, forms an exposure product having a higher solubility in a liquid developer than the non-irradiated composition.
Abstract:
PURPOSE: To enhance the storage stability, thermal stability and the light absorptivity within the chemical ray region of a compsn. by incorporating specific dyes therein. CONSTITUTION: The above positive type photosensitive compsn. contains a photosensitive compd. (A), a binder (B) which is insoluble in water and swells in an aq. alkaline soln. and the dyes of the formula which absorbs the light within the chemical ray region. In the formula, R1 denotes H, alkyl,aryl, etc.; R2 , R3 denote H, hydroxyl, alkyl, etc.; R4 to R7 denote H, hydroxy, aryl, etc. The compd. having an absorption peak within a range of 365 to 436nm is preferably used as the dyes of the formula. An o-quinonediazide compd. is preferably used as the compd. A and a novolak condensed resin as the binder B.
Abstract:
A positive-functioning radiation-sensitive mixt. (A) is claimed, contg. (a) a polymeric binder with acid-labile gps., contg. units of formula (I), (II) and (III) and (b) a cpd. which forms a strong acid when irradiated; R OH (I), R -O-CO2OR (II), R -O-CH2-CHR -OH (III): R = opt. substd. Ph attached to a polymer main or side chain; R = 3-11C alkyl or alkenyl, or 7-11C aralkyl; R = H, opt. substd. alkyl or aryl, phthalimidomethyl, or -CH2OR (with R = H, or opt. substd. aliphatic, cycloaliphatic or aromatic gp.). Also claimed is a recording material with a substrate and a radiation-sensitive layer consisting of compsn. (A).
Abstract:
Light-sensitive compounds are described which have the formula (I) wherein R1 and R2 denote H or alkyl, R3 and R4 denote H or 4,6-bis-trichloromethyl-s-triazin-2-yl, R5 and R6 denote H or halogen, alkyl, alkenyl or alkoxy, and Ar denotes a mononuclear to trinuclear aromatic group. These compounds are suitable as photoinitiators for free-radical polymerizations or as photolytic acid donors for acid-cleavable compounds, and for cross-linking and color formation reactions. They are distinguished by a high sensitivity in various spectral ranges.
Abstract:
Hoe 79/K 031 RADIATION-SENSITIVE MIXTURE AND PROCESS FOR THE PRODUCTION OF RELIEF IMAGES A radiation-sensitive mixture is described which contains (a) a compound which forms an acid under the action of actinic radiation, and (b) a polymeric compound having recurrent orthocarboxylic acid ester groupings, and which comprises a polymeric compound which is built up from recurrent units of the formula I: (I) wherein R1 is a hydrogen atom or an alkyl, cycloalkyl or aryl group, R2, R3 and R5 are identical or different and denote hydrogen atoms or alkyl or aryl groups, R4 denotes an alkylene group or - if a1 = a2 = 1 - also an alkyleneoxy group, it being possible for the alkylene groups to be interrupted by hetero-atoms or by unsaturated or cyclic groups, R6 denotes a hydrogen atom or a methyl group, a1 and a2 each denote 0, 1 or 2, a1 + a2 Hoe 79/K 031 denotes 1 or 2 and m denotes a number from 3 to 200. The mixtures are suitable for the production of reprographic materials, in particular printing plates, of high photosensitivity.
Abstract:
A positive-working light-sensitive mixture for the preparation of printing plates, in particular planographic printing plates, and photoresists is described, which comprises an alkali-soluble binder, preferably a novolak, and an o-naphthoquinone diazide of the formula (I) in which R1, R1', R2 and R2' are identical or different and represent hydrogen, chlorine or bromine atoms, alkyl, alkoxy or alkoxyalkyl groups having 1 to 6 carbon atoms or alkenyl groups having 2 to 6 carbon atoms, R3 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, R4 represents a hydrogen atom, an optionally substituted alkyl group, the carbon chain of which can be interrupted by ether oxygen atoms, an optionally substituted cycloalkyl group having 5 to 16 carbon atoms or an optionally substituted alkenyl group having 2 to 16 carbon atoms, n represents zero or an integer from 1 to 4 and D represents a 1,2naphthoquinone-2-diazide-sulfonyl group. The new naphthoquinone diazides are distinguished by a high solubility in organic solvents and by good reprographic properties.
Abstract:
This invention relates to a radiation-sensitive copying composition comprising a compound (1) which splits-off an acid upon irradiation and a compound (2) having at least one C-O-C-bond capable of being split by acid, said compound (2) capable of being split by acid being a compound having at least one group selected from the group consisting of a carboxylic ortho acid ester group and a carboxylic acid amide acetal group.