Thioxanthone derivatives, and their use as cationic photoinitiators

Photoinitiator compounds of formula (I): {where: A represents a direct bond or a group of formula -[O(CHR7CHR6)a]y-, -[O(CH2)bCO]y-, or -[O(CH2)bCO](y-1)-[O(CHR7CHR6)a]-, where one of R6 and R7 is hydrogen and the other is hydrogen or methyl; a is a number from 1 to 2; b is a number from 4 to 5; Q i...

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Bibliographische Detailangaben
Hauptverfasser:	DAVIDSON ROBERT S, HERLIHY SHAUN L
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES APPARATUS SPECIALLY ADAPTED THEREFOR CHEMICAL PAINT OR INK REMOVERS CHEMISTRY CINEMATOGRAPHY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON CORRECTING FLUIDS DYES ELECTROGRAPHY FILLING PASTES HETEROCYCLIC COMPOUNDS HOLOGRAPHY INKS MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS MATERIALS THEREFOR METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS ORIGINALS THEREFOR PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PHOTOGRAPHY PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES PHYSICS POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	Photoinitiator compounds of formula (I): {where: A represents a direct bond or a group of formula -[O(CHR7CHR6)a]y-, -[O(CH2)bCO]y-, or -[O(CH2)bCO](y-1)-[O(CHR7CHR6)a]-, where one of R6 and R7 is hydrogen and the other is hydrogen or methyl; a is a number from 1 to 2; b is a number from 4 to 5; Q is a residue of a polyhydroxy compound having 2 to 6 hydroxy groups; x is a number greater than 1 but no greater than the number of available hydroxyl groups in Q; y is a number from 1 to 10; R1, R2, R3 and R4 are individually the same or different and each is hydrogen, hydroxy, or alkyl; or R1 and R3 are joined to form a fused ring system with the benzene rings to which they are attached; and R5 represents a direct bond, an oxygen atom or a methylene group} are useful as cationic photoinitiators, especially for use in surface coating applications, such as printing inks and varnishes, and which are intended to be cured by polymerisation initiated by radiation.