Pressure-and-heat-sensitive copying paper

Abstract

A heat or pressure sensitive copying paper is provided containing a fluoran compound as a color former, said color being developed in said heat or pressure sensitive copying paper through the application of heat or pressure, said fluoran compound being of the formula ##STR1## wherein R 1 is halogen; R 2 is hydrogen or methyl; R 3 is hydrogen, methyl or ethyl; each of R 4 is independently halogen or methyl; R 5 is methyl or ethyl; and n is 0 or an integer from 1 to 4.

I claim: .[.1. A heat or pressure sensitive copying paper containing a fluoran compound as a color former, said color being developed in said heat or pressure sensitive copying paper through the application of heat or pressure, said fluoran compound being of the formula ##STR20## wherein R 1  is halogen; R 2  is hydrogen or methyl; R 3  is hydrogen, methyl or ethyl; each of R 4  is independently halogen or methyl; R 5  is methyl or ethyl; and n is 0 or an integer from 1 to 
     
        4..]. .[.2.  A heat or pressure sensitive copying paper of claim 1 wherein said fluoran is 2-p-chloroanilino-6-diethylaminofluoran..]. .[.3. A heat or pressure sensitive copying paper of claim 1 wherein said fluoran is 2-m-chloroanilino-6-diethylaminofluoran..]. .[.4. A heat or pressure sensitive copying paper of claim 1 wherein said fluoran is 2-o-chloroanilino-6-diethylaminofluoran..]. .[.5. A heat or pressure sensitive copying paper of claim 1 wherein said fluoran is 2-(3',5'-dichloroanilino)-6-diethylaminofluoran..]. .[.6. A heat or pressure sensitive copying paper of claim 1 wherein said fluoran is 2-(3',4'-dichloroanilino)-6-diethylaminofluoran..]. .[.7. A heat or pressure sensitive copying paper of claim 1 wherein said fluoran is 2-p-chloroanilino-3-methyl-6-diethylaminofluoran..]. .[.8. A heat or pressure sensitive copying paper of claim 1 wherein said fluoran is 2-m-chloroanilino-3-methyl-6-diethylaminofluoran..]. .[.9. A heat or pressure sensitive copying paper of claim 1 wherein said fluoran is 
     
     
        2-o-chloroanilino-3-methyl-6-diethylaminofluoran..]. .[.10.  A heat or pressure sensitive copying paper of claim 1 wherein said fluoran is 2-p-bromoanilino-3-methyl-6-diethylaminofluoran..]. .[.11. A heat or pressure sensitive copying paper of claim 1 wherein said fluoran is 2-(4'-chloro-3'-methylanilino)-3-methyl-6-diethylaminofluoran..]. .[.12. A heat or pressure sensitive copying paper of claim 1 wherein said fluoran is 2-(3',5'-dichloroanilino)-3- methyl-6-diethylaminofluoran..]. .[.13. A heat or pressure sensitive copying paper of claim 1 wherein said fluoran is 2-(3',4'-dichloroanilino)-3-methyl-6-diethylaminofluoran..]. .[.14. A heat or pressure sensitive copying paper of claim 1 wherein said fluoran is 2-(2',5'-dichloroanilino)-6-diethylaminofluoran..]. .[.15. A heat or pressure sensitive copying paper of claim 1 wherein said fluoran is 2-(4'-chloro-N-methylanilino)-6-diethylaminofluoran..]. .[.16. A heat or pressure sensitive copying paper of claim 1 wherein said fluoran is 2-(4'-chloro-N-ethylanilino)-6-diethylaminofluoran..]. .[.17. A heat or pressure sensitive copying paper of claim 1 wherein said fluoran is 2-(4'-chloro-3-'-methylanilino)-3-methyl-6-dimethylaminofluoran..]. .[.18. A heat sensitive copying paper of claim 1..]. .[.19. A pressure sensitive copying paper of claim 1..]. .Iadd. 20. A heat or pressure sensitive copying paper containing a fluoran compound as a color former, said color being developed in said heat or pressure sensitive copying paper through the application of heat or pressure, said fluoran compound being selected from the group consisting of 2-m-chloroanilino-6-diethylaminofluoran; 2-o-chloroanilino-6-diethylaminofluoran; 2-(3',5'-dichloroanilino)-6-diethylaminofluoran; 2-(3',4'-dichloroanilino)-6-diethylaminofluoran; 2-p-chloroanilino-3-methyl-6-diethylaminofluoran; 2-m-chloroanilino-3-methyl-6-diethylaminofluoran; 2-o-chloroanilino-3-methyl-6-diethylaminofluoran; 2-p-bromoanilino-3-methyl-6-diethylaminofluoran; 2-(4'-chloro-3'-methylanilino)-3-methyl-6-diethylaminofluoran; 2-(3',5'-dichloroanilino)-3-methyl-6-diethylaminofluoran; 2-(3',4'-dichloroanilino)-3-methyl-6-diethylaminofluoran; 2-(2',5'-dichloroanilino)-6-diethylaminofluoran; 2-(4'-chloro-N-methylanilino)-6-diethylaminofluoran; 2-(4'-chloro-N-ethylanilino)-6-diethylaminofluoran and 2-(4'-chloro-3'-methylanilino)3-methyl-6-dimethylaminofluoran. .Iaddend..Iadd. 21. A heat sensitive copying paper containing a fluoran compound as a color former, said color being developed in said heat sensitive copying paper through the application of heat, said fluoran compound being 2-m-chloroanilino-6-diethylaminofluoran. .Iaddend..Iadd. 22. A heat sensitive copying paper containing a fluoran compound as a color former, said color being developed in said heat sensitive copying paper through the application of heat, said fluoran compound being 2-o-chloroanilino-6-diethylaminofluoran. .Iaddend.