摘要:
The invention relates to a positive-working radiation-sensitive mixture and a copying material produced therefrom on a layer support. The mixture contains as essential constituents a 1,2-quinone diazide or a combination of:1) a compound forming strong acid when exposed to actinic radiation and2) a compound containing at least one acid-cleavable C--O--C bond,and a binder with repeating units of the general formula I ##STR1## wherein R.sub.1 denotes a hydrogen or halogen atom, or a cyanide or an alkyl group,R.sub.2, R.sub.3, R.sub.4 are identical or different and denote hydrogen, or alkyl or aryl groups,R.sub.5, R.sub.6 and optionally R.sub.7 are identical or different and denote hydrogen or halogen atoms, or alkyl, aryl or alkoxy groups, andX denotes the atoms necessary to complete a mononuclear or polynuclear carbocyclic aromatic ring system, andn is 1, 2 or 3.The mixture according to the invention yields lithographic printing plates with a high print run which can be thermally post-cured and have good resistance to chemicals, also photoresists with high heat resistance.
摘要:
An electrophotographic recording material comprising: an electrically conductive base layer; a photoconductive layer which can be de-coated with alkaline solutions, the photoconductive layer comprising an organic photoconductor, a sensitizer and a binder comprising a mixture of: a) a copolymer comprising units composed of a first vinyl aromatic compound and units composed of maleic anhydride and/or a maleic partial ester, and b) a copolymer comprising units composed of a second vinyl aromatic compound and units of (meth)acrylic acid.
摘要:
A process for developing irradiated radiation-sensitive recording materials using an aqueous-alkaline developer which contains compounds of the formula (I) ##STR1## wherein A is H, Na, K, NH.sub.4 or NR.sub.4, where R is a substituted or unsubstituted alkyl radical, W and X, independently of one another are H or --CH.sub.2 --COOA, Y is H or COOA and Z is H or OH, wherein the compound of the formula (I) contains at least 3 COOA units.
摘要:
The invention relates to a non-continuous matte layer that can be used with a recording material having a substrate and a radiation-sensitive layer which contains a 1,2-naphthoquinone-2-diazide and an organic, polymeric binder which is insoluble in water but soluble in aqueous alkaline solutions. This matte layer comprises 100 to 10,000 particles per square centimeter which have a mean diameter of less than 40 .mu.m and a maximum diameter of less than 80 .mu.m and a mean height of 2 to 6 .mu.m and a maximum height of 10 .mu.m, and contains a resin which has up to 0.80 mmol of acid groups and/or salt groups per gram. The matte layer is obtained by spraying on and drying an aqueous, anionically or anionically/nonionically stabilized dispersion of the resin.
摘要:
A photosensitive recording material is described which has a layer base, a negative-working photosensitive layer containing a diazonium salt and a water-insoluble polymeric binder which is soluble or swellable in aqueous alkaline solutions, and a discontinuous top layer which forms a rough surface and which is composed of particles of a water-insoluble polymer which is dispersible in water in the presence of anionic or anionic/nonionic dispersants and which has a content of free acid groups or acid groups neutralized by salt formation of less than 0.8 mmol/g, the mean height of the particles being 2 to 6 .mu.m, the maximum height less than 10 .mu.m, the mean horizontal diameter less than 40 .mu.m, the maximum diameter less than 80 .mu.m and the number of particles being 100 to 10,000 per cm.sup.2. The material is suitable for the production of planographic printing plates and requires only short vacuum times in a vacuum-operated copying frame. The material can be developed without residue after exposure, the rough surface remaining intact at the image areas.
摘要:
A process for developing irradiated radiation-sensitive recording materials using an aqueous-alkaline developer which contains compounds of the formula (I) ##STR1## wherein A is H, Na, K, NH.sub.4 or NR.sub.4, whereR is a substituted or unsubstituted alkyl radical,W and X, independently of one another are H or --CH.sub.2 --COOA,Y is H or COOA andZ is H or OH,wherein the compound of the formula (I) contains at least 3 COOA units.
摘要:
The invention relates to a positive-working colored photosensitive recording material for the production of a color test image, composed of a temporary layer carrier, a photosensitive layer containing dyestuff or pigment, binder and quinonediazide compound and an adhesive layer which can be activated by means of heat, wherein a release layer based on polyvinyl alcohol is present on the surface of the temporary layer carrier, the photosensitive layer comprises, as the quinonediazide compound, an esterification product of a compound containing one or more phenolic hydroxyl groups and o-quinonediazide-sulfonyl chloride, and, as the binder, a novolak-free phenolic polymer resin and/or a reaction product of the phenolic polymer resin with a monoisocyanate, and the adhesive layer comprises a alkali-insoluble organic polymer and an alkali-soluble polyester. The invention also relates to a process for the production of a color test image using the recording material described.
摘要:
A radiation-sensitive mixture, a radiation-sensitive recording material produced from themixture, and a process for producing heat-resistant and chemical-resistant relief copies using the recording material are disclosed. The normally positive-working radiation-sensitive mixture contains(1) a water-insoluble polymeric binder which is soluble in aqueous alkaline solutions, and(2) a 1,2-quinone diazide and/or a combination ofa compound which forms strong acid when exposed to actinic radiation anda compound containing at least one acid-cleavable C--O--C bond.The polymeric binder has a molecular weight of between about 5,000 and 100,000 and a content of phenolic hydroxyl groups of about 1 to 15, preferably about 2 to 10, mmol/g of polymer. It has a content of --CH.sub.3-n X.sub.n units of at least 0.1, preferably about 0.5 to 2, mmol/g of polymer, X being halogen such as chlorine, bromine or iodine and n being 1, 2 or 3. Lithographic plates are produced with the mixture which are thermally postcurable, have a high print run and have good resistance to chemicals. Photoresists having high heat resistance can also be produced with the mixture.
摘要:
A positive-working radiation-sensitive mixture and recording material are disclosed. The mixture contains, as essential constituents, a 1,2-quinone diazide and/or a combination of a compound which forms strong acid on exposure to actinic radiation and a compound containing at least one cleavable C--O--C bond and a polymeric binder containing repeating units of formula I ##STR1## in which R.sub.1 is a hydrogen or halogen atom, or a cyanide or an alkyl group, R.sub.2, R.sub.3 are identical or different and are hydrogen, or alkyl or aryl groups, R.sub.4, R.sub.5 are identical or different and are and R.sub.6 hydrogen or halogen atoms, or alkyl, alkoxy or aryl groups, X represents the atoms necessary to complete a monocyclic or polycyclic carbocyclic aromatic ring system, and is 1, 2 or 3. The mixture yields lithographic plates having high print runs which can be thermally post-cured and which have good resistance to chemicals. The mixture also produces photoresists having good heat resistance.
摘要:
A process for producing negative copies is disclosed in which a light-sensitive or radiation-sensitive recording material comprising a layer support and a normally positive-working light-sensitive or radiation-sensitive layer applied thereto is irradiated imagewise, thermally treated, irradiated overall and then developed with an alkaline developer. Thermal treatment is carried out with water or with an aqueous solution, at temperatures in the range from about 50.degree. to 100.degree. C., preferably from 60.degree. to 90.degree. C., within a period of time varying between about 1 second and 5 minutes, preferably between 5 seconds and 1 minute, overall irradiation is performed on the optionally still hot recording material and development is thereafter carried out within a period of time varying between about 10 seconds and 2 minutes, preferably between 15 seconds and 1 minute. The process can be carried out according to the customary procedure known in the practice of positive processing, and results in perfect printing stencils.