Radiation sensitive recording material
AssigneeAgfa-Gevaert
InventorsGunther Arnold, Gabor Paal, Alfred Wilhelm, Kurt Halfar, Hans Peter Vollmer
Life of this patent
Estimating the term…
Abstract
A radiation sensitive recording material contains a layer of a layer-forming substance and incorporated therein an organic halogen compound capable of producing hydrogenhalide when struck by high energy radiation, and a chromogenic arylvinyl pyran or arylvinylthio pyran which changes its color by reaction with hydrolide. The material provides records with high stability.
Claims7
Radiation sensitive recording material comprising a sheet comprised of a radiation sensitive organic halogen compound capable of producing hydrohalide by the action of ultraviolet light and an organic chromogenic compound capable of changing its color by reaction with hydrohalide and a layer forming substance containing a polymer for forming said organic halogen compound and said organic chromogenic compound in a layer wherein the improvement comprises the chromogenic compound is an arylvinylpyran or arylvinylthiopyran of the formula ##SPC3##
- wherein
- Ar represents a phenyl or naphthyl group;
- both a's taken together represent a group necessary for completing an aryl group condensed to the pyran or thiopyran ring;
- Y represents oxygen or sulfur
- R.sub.1 represents hydrogen, alkyl, alkenyl or aryl
- R.sub.2 and R.sub.3 are the same or different and represent each hydrogen, alkyl, phenyl or both together an alkylene bridge.
Radiation sensitive recording material comprising a sheet comprised of a radiation sensitive organic halogen compound capable of producing hydrohalide by the action of ultraviolet light and an organic chromogenic compound capable of changing its color by reaction with hydrohalide, a polymeric layer forming substance containing a polymer for forming a layer with the organic halogen compound and said organic chromogenic compound wherein the improvement comprises the chromogenic compound is an arylvinylpyran or arylvinylthiopyran of the formula ##SPC4##
- wherein
- Ar represents phenyl or naphthyl;
- both a's taken together represent a group necessary for completing an aryl group condensed to the pyran or thiopyran ring;
- Y represents oxygen or sulfur
- R.sub.1 represents hydrogen, alkyl, alkenyl or aryl
- R.sub.2 and R.sub.3 are the same or different and represent each hydrogen, alkyl, phenyl, or both together an alkylene bridge.
Radiation sensitive recording material comprising a sheet comprised of a radiation sensitive organic halogen compound capable of producing hydrohalide by the action of long wave light and an organic chromogenic compound capable of changing its color by reaction with hydrohalide and a layer forming substance containing a polymer for forming said organic halogen compound and said organic chromogenic compound in a layer wherein the improvement comprises the chromogenic compound is an arylvinylpyran or arylvinylthiopyran of the formula ##SPC5##
- wherein
- Ar represents a phenyl or naphthyl group;
- both a's taken together represent a group necessary for completing an aryl group condensed to the pyran or thiopyran ring;
- Y represents oxygen or sulfur
- R.sub.1 represents hydrogen, alkyl, alkenyl or aryl
- R.sub.2 and R.sub.3 are the same or different and represent each hydrogen, alkyl, phenyl, or both together an alkylene bridge, and the layer contains a sensitizing substance for long wave light.
Dependencies are inferred from the claim text.