Abstract: Quaternary salts having a pyrido-[1,2-a]-indole nucleus are useful optical brightening agents for synthetic and natural fibers and fabrics. The quaternary salts are especially useful optical brighteners for paper and acrylic fibers.

Abstract: A large particle sized silica sol and a fluorescent dye are mixed together and applied as a coating to a substrate with the application monitored during coating by a light which renders the fluorescent dye visible; if the coating is blotched or uneven, corrections can be made during the run to provide a uniform coating.

Abstract: The present invention relates generally to charge image storage tubes having a direct viewing storage target including a storage dielectric of phosphor material capable of bistable storage of a charge image and which emits a light image corresponding to such charge image, and in particular to an improved storage dielectric of phosphor particles coated with smaller particles of a high secondary electron emissive material bonded to such phosphor particles and to a method of manufacture thereof. A small amount of secondary emissive material is employed efficiently to increase the writing speed and useful lifetime of the storage dielectric without greatly decreasing the brightness of the light image emitted by the phosphor. In one embodiment using 3.5 per cent of magnesium oxide secondary emissive material with 96.5 per cent of manganese activated zinc orthosilicate phosphor material, a writing speed of 400,000 centimeters per second and a light image brightness of 3.5 foot-lamberts was obtained.

Abstract: Benzodifuran compounds of the formula ##SPC1##WhereinR represents alkoxy, aralkoxy, aryloxy, cycloalkoxy, hydroxyl, an oxygen atom linked to the radical Ar, or the group ##EQU1## R.sub.1 and R.sub.2 independently of one another denote hydrogen, alkyl, aralkyl or aryl, or together denote a saturated carbocyclic or heterocyclic ring and Ar denotes an aromatic-carbocyclic or aromatic-heterocyclic radical, with the proviso that Ar denotes a substituted benzene radical if R represents C.sub.1 -C.sub.2 -alkyl,Are suitable as optical brightening agents and UV-absorber for organic materials.

Abstract: Disclosed are stilbene compounds of formula I, ##SPC1##in whichR.sub.1 signifies hydrogen, halogen or C.sub.1-6 alkyl,R.sub.2 signifies hydrogen or methyl,R.sub.3 signifies cyano or a radical --CONR.sub.7 R.sub.8 in which either R.sub.7 and R.sub.8, independently, each signifies hydrogen, C.sub.1-6 alkyl or C.sub.2-6 hydroxyalkyl, or R.sub.7 and R.sub.8, together with the nitrogen atom, signify a pyrrolidine, piperidine or morpholine radical,Either R.sub.4 and R.sub.5, independently, each signifiesC.sub.1-6 alkyl or C.sub. 2-6 hydroxyalkyl, or R.sub.4 and R.sub.5, together with the nitrogen atom, form a radical (a) ##EQU1## in which --X-- signifies --CH.sub.2 --, --O--, --S--, a direct bond, or --NR.sub.9 --, in which R.sub.9 signifies C.sub. 1-6 alkyl or C.sub.2-6 hydroxy-alkyl,R.sub.6 signifies hydrogen or C.sub.1-6 alkyl, unsubstituted or substituted by hydroxy, cyano or aminocarbonyl,M signifies hydrogen or a non-chromophoric cation,A.sup.

Abstract: Disclosed are compounds of formula I, ##SPC1##in which R.sub.1 signifies hydrogen, fluorine, bromine, chlorine, C.sub.1-6 alkyl, C.sub.1-6 alkoxy or --SO.sub.3 M,R.sub.2 signifies cyano or --CONR.sub.3 R.sub.4,in which either R.sub.3 and R.sub.4, independently, each signify hydrogen, C.sub.1-6 alkyl or C.sub.2-6 hydroxyalkyl,Or R.sub.3 and R.sub.4, together with the nitrogen atom to which they are attached, signify a pyrrolidino, piperidino or morpholino ring, andM signifies hydrogen or a non-chromophoric cation,Their production and use as optical brightening agents, particularly for cellulosic substrates such as paper and cotton.

Abstract: The present invention provides new bis-s-triazinylamino-stilbene-2,2'-disulphonic acids of the formula ##SPC1##And the alkali metal, alkaline earth metal, earth metal, ammonium or amine salt thereof.The new compounds are valuable optical brighteners, especially for whitening paper in combination with the surface finishing.

Abstract: Disclosed are compounds of formula I ##SPC1##in which n signifies 2 or 3,Their production and use as optical brighteners, particularly for polymeric and textile substrates.

Abstract: An elastomer-based heat sealable adhesive composition and method of making the same having an improved balance of physical and chemical properties including improved peel adhesion, tack, and creep resistant characteristics, together with the capability to selectively vary such characteristics. The composition is adapted for formation in situ on a substrate by the chemical formation of an elastomer base material in the presence of a compatible resin material. The elastomer material comprises the reactive product of a reactive component and a coreactive component with the reactive component, including a liquid diene telechelic polymer material and with the coreactive component including an organic coreactive material which is capable of reacting with the diene telechelic polymer material.

Abstract: A benzofuran compound of the formula ##SPC1##Where X.sup.- denotes HSO.sub.4.sup.- , CH.sub.3 SO.sub.4.sup.- , Cl.sup.-, Br.sup.-, 1/2 2ZnCl.sub. 4.sup.-.sup.- or CH.sub.3 COO.sup.-. The said compounds are dyes for synthetic textile material.