Radiation-sensitive mixture and radiation-sensitive copying...

Details Radiation-sensitive mixture and radiation-sensitive copying... Radiation-sensitive mixture and radiation-sensitive copying...

G - Physics

03

C

96/158

G03C 1/52 (2006.01) G03F 7/105 (2006.01)

Patent

CA 2000052

Abstract of the Disclosure The invention relates to a radiation- or photosensitive mixture and to a radiation-sensitive copying material produced from said mixture, comprising: A) a 1,2-quinonediazide and/or a combination of 1. a compound forming a strong acid under the action of actinic radiation and 2. a compound having at least one acid-cleavable C-O-C bond; B) a binder which is insoluble in water and soluble in aqueous-alkaline solutions; and C) a spiro-indolino-benzopyran of the general formula I Image in which R denotes hydrogen or an alkyl radical having 1 to 6 carbon atoms, R1, R2, R3, R4 are identical to or different from one another and denote hydrogen or halogen, alkyl groups or alkoxy groups having 1 to 4 carbon atoms or hydroxy groups or nitro groups; and R5, R6, R7, and R8 are identical to or different from one another and denote hydrogen or halogen, nitro groups or amino groups, alkyl groups, alkoxy groups or hydroxyalkyl groups having 1 to 5 carbon atoms or aryl groups having 6 to 10 carbon atoms. Upon exposure, the mixture results in a very pronounced color contrast which is maintained even at elevated temperatures.

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