NOVEL ONIUM SALTS AND THE USE THEREOF AS PHOTOINITIATORS

• Main Authors: SAEVA, FRANKLIN DONALD, BRESLIN, DAVID THOMAS
• Format: Patent
• Language: English; French; German
• Published: 25.09.1991
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; APPARATUS SPECIALLY ADAPTED THEREFOR; AUXILIARY PROCESSES IN PHOTOGRAPHY; CHEMISTRY; CINEMATOGRAPHY; COLOUR PRINTING; ELECTROGRAPHY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HOLOGRAPHY; LINING MACHINES; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING,INKING, DAMPING, OR THE LIKE; MATERIALS THEREFOR; METALLURGY; ORGANIC CHEMISTRY; ORIGINALS THEREFOR; PERFORMING OPERATIONS; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES; PHOTOGRAPHY; PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES; PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHYSICS; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM; PRINTING; PRINTING PLATES OR FOILS; PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; STAMPS; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; TRANSPORTING; TYPEWRITERS

Les sels de sulfonium, sélénonium, arsonium, amonium et phosphonium, utiles en tant que photoamorces, comprennent: un chromophore absorbant les rayonnements visibles, le chromophore (1) ayant un ion d'hydrogène positif pouvant être éliminé et (2) présentant une orbite moléculaire occupée dont l'énergie est supérieure à celle d'au moins un autre substituant fixé à l'atome S, Se, As, N ou P du sel; un groupe reliant le chromophore à l'atome S, Se, As, N ou P du sel, le groupe empêchant partiellement la résonnance pi entre le chromophore et les autres substituants se trouvant dans le sel; au moins un substituant comprenant un groupe de retrait d'électrons et présentant une orbite moléculaire inoccupée inférieure à celle du chromophore; et, un anion; les sels étant capables, lors d'une exposition à un rayonnement visible, de former un acide de Bronsted. Sulfonium, selenonium, arsonium, ammonium and phosphonium salts, useful as photoinitiators, comprise: a chromophore which absorbs visible radiation, the chromophore (1) having a removable positive hydrogen ion and (2) exhibiting a higher energy occupied molecular orbital than at least one other substituent attached to the S, Se, As, N or P atom of the salt; an insulating group which links the chromophore to the S, Se, As, N or P atom of the salt, the insulating group essentially preventing pi resonance between the chromophore and the other substituents in the salt; at least one substituent comprising an electron withdrawing group and exhibiting a lower unoccupied molecular orbital than the chromophore; and, an anion; the salts being capable, upon exposure to visible radiation, of forming a Bronsted acid.