Photochromic composition containing polyhalogenated hydrocarbon,spiropyran compound and poly-n-vinylcarbazole and the use thereof

Abstract

Abstract A PHOTOGRAPHIC PROCESS WHEREIN A CISIBLE IMAGE IS FORMED BY PRINT-OUT OR OPTICAL DEVELOPMENT IN A RECORDING MATERIAL COMPRISING IN INTIMATE ADMIXTURE A SPIROPYRAN COMPOUND, AN ULTRAVIOLET LIGHT-SENSITIVE COMPOUND CAPABLE OF PRODUCING ON EXPOSURE WITH ULTRAVIOLET LIGH WITH THE SPIROPYRAN A DYE SALT AND AS SENSITIZIING AGENT A POLYMERIC COMPOUND CONTAINING RECURRING UNITS OF THE FOLLOWING GENERAL STRUCTURE: -C(-R1)(-A-N<(-C(-Q1)=C(-Q2)-(Z)(N-1)-C(-Q4)=C(-Q3)-))- CH(-R2)- WHEREIN: Z REPRESENTS A SULPHUR ATOM OR A SINGLE BOND, A REPRESENTS A SINGLE BOND OR A -CH2-GROUP, R1 REPRESENTS HYDROGEN OR A LOER ALKYL RADICAL, R2 REPRESENTS HYDROGEN OR A LOWER ALKYL RADICAL, Q1 AND Q2 EACH REPRESENT A HYDROGEN ATOM OR TOGETHER THE NECESSARY ATOMS TO CLOSE AN ADJACENT CARBOYCLIC RING OR RING SYSTEM INCLUDING SUCH RING OR RING SYSTEM IN SUBSTITUTED FORM, Q3 AND Q4 EACH REPRESENT A HYDROGEN ATOM OR TOGETHER THE NECESSARY ATOMS TO CLOSE AN ADJACENT CARBOCYCLIC NUCLEUS OR RING SYSTEM INCLUDING SUCH A RING OR RING SYSTEM IN SUBSTITUTED FORM, N REPRESENTS 1 OR 2. PREFERRED RECORDING MATERIALS CONTAIN A SPIRODINAPHTHOPYRAN COPOUND, CARBON TETRABROMIDE AND/OR IODOFORM AND AS SENSITIZING AGENT POLY-N-VINYLCARBAZOLE ACTING AS A BINDER AND A TRIARYL STIBINE AS ANTIFOGGING AGENT.

Inventors

• 👤 U Laridon
• 👤 Den Houte J Van

Bibliographic Details