Abstract: Compounds of the Formula (I) wherein x is an integer from 1-4; p is an integer from 1-3; q is an integer from 0-3; Ar is phenyl, naphthyl, anthryl or phenanthryl each of which optionally is substituted by one or more Cl, CN, OR5, C3-C5alkenyl or C1-C6alkyl which optionally is substituted by one or more OR6, COOR or halogen; R1 if x is 1, is OR7, O—X+, NR8R9, C1-C20alkyl optionally substituted by one or more COOR10, or is C2-C20alkyl interrupted by one ore more O, or is C2-C5alkenyl or phenyl-C1-C4alkyl; R1 if x is 2, is for example C1-C20alkylene; R1 if x is 3, is for example a tri-valent radical; R1 if x is 4, is for example a tetravalent radical; R2 and R3 are hydrogen or C1-C8alkyl, or R2 and R3 together are O, C1-C3alkylene or CH?CH; R4 is C1-C4alkyl; R5, R6, R7, R8, R9 and R10 are for example hydrogen or C1-C4alkyl; and X is a x-valent cationic counter ion; are in particular suitable as photoinitiators for the curing with UV-A light (320-450 nm).

Abstract: The present invention provides organometallic latent catalyst compounds, which are suitable as catalysts in polyaddition or polycondensation reactions which are catalysed by a Lewis acid type catalyst, in particular for the crosslinking of a blocked or unblocked isocyanate or isothiocyanate component with a polyol or polythiolto form a polyurethane (PU).

Abstract: The present invention provides organometallic latent catalyst compounds, which are suitable as catalysts in polyaddition or polycondensation reactions which are catalysed by a Lewis acid type catalyst, in particular for the crosslinking of a blocked or unblocked isocyanate or isothiocyanate component with a polyol or polythiolto form a polyurethane (PU).

Abstract: The invention relates to novel photoinitiators of formula (I) wherein each of the substituents is given the definition as set forth in the Specification and the claims. The photoinitiators can be used to prepare multifunctional photoinitiators.

Abstract: The invention relates to novel photoinitiators of formula (I) wherein A is —O—, —CH2?, CH(CH3)— or —C(CH3)2?, and R is methyl or trimethylsilyl, and R may in addition be hydrogen when A is simultaneously the group —C(CH3)2?. The invention relates also to compositions comprising (A) at least one ethylenically unsaturated compound, (B) a photoinitiator of formula (I), (C) optionally further binders or additives, (D) optionally further photoinitiators or co-initiators. Compositions comprising (A) an ethylenically unsaturated compound that contains at least one aminoacrylate, (B) a photoinitiator of formula (II) or (III), (C) optionally further binders or additives, (D) optionally further photoinitiators or co-initiators.

Abstract: Compounds of the Formula (I) wherein x is an integer from 1-4; p is an integer from 1-3; q is an integer from 0-3; Ar is phenyl, naphthyl, anthryl or phenanthryl each of which optionally is substituted by one or more Cl, CN, OR5, C3-C5alkenyl or C1-C6alkyl which optionally is substituted by one or more OR6, COOR or halogen; R1 if x is 1, is ORS, O—X+, NR8R9, C1-C20alkyl optionally substituted by one or more COOR10, or is C2-C20alkyl interrupted by one ore more O, or is C2-C5alkenyl or phenyl-C1-C4alkyl; R1 if x is 2, is for example C1-C20alkylene; R1 if x is 3, is for example a tri-valent radical; R1if x is 4, is for example a tetravalent radical; R2and R3are hydrogen or C1-C8alkyl, or R2and R3 together are O, C1-C3alkylene or CH?CH; R4 is C1-C4alkyl; R5, R6, R7, R8, R9 and R10 are for example hydrogen or C1-C4alkyl; and X is a x-valent cationic counter ion; are in particular suitable as photoinitiators for the curing with UV-A light (320-450 nm).

Abstract: The invention provides a uv-curable colored composition, comprising (a) at least one selected ethylenically unsaturated photopolymerizable compound; (b) at least one selected curing agent; and (c) at least one selected colorant.

Abstract: The invention relates to novel photoinitators of formulae (I), (II), (III), (IV), (V) and (VI) wherein R1 and R2 are each independently of the other C1-C8alkyl; C1-C4alkyl substituted by OH, C1-C4alkoxy, —COO(C1-C8alkyl), (C1-C4alkyl)-COO—, —CN, benzyl, phenyl or by —N(R15)(R16); C3-C6alkerlyl, benzyl, —CH2—C6H4—(C1-C4alkyl) or phenyl; or R1 and R2 together are unbranched or branched C2-C9alkylene or C3-C6-oxa- or -azaalkylene; R3, R4, R5 and R6 are each independently of the others hydrogen, C1-C8alkyl, C3-C6alkenyl, benzyl, —CH2—C6H4—(C1-C4alkyl) or phenyl; R3 and R4 together and/or R5 and R6 together are unbranched or branched C2-C9alkylene; A is CI, Br, —O—R9, —N(R11)(R12) or —S—R18, A? is —O—, —NH— or —NR11—; A? is CI, Br, —O—R9, —N(R11)(R12) or —S—R18 or hydrogen, X is —O—R10 or —N(R13)(R14), n is an integer from 1 to 10, preferably an integer from 1 to 4, especially 1, 2 or 3; R7 is a linker; R8 is a bivalent C2-C3alkylele radical.

Abstract: Compounds of formula I Y is, for example, C3-C12alkylene, butenylene, butynylene, or C4-C12alkylene interrupted one or more times by non-consecutive —O— or —NR2—; R1 is a reactive group selected from OH, SH, NR3R4, —(CO)—OH, —(CO)—NH2, SO3H, —C(R5)?CR6R7, oxiranyl, —O—(CO)—NH—R8—NCO and —O—(CO)—R9—(CO)—X; R2 is hydrogen, C1-C4alkyl or C2-C4hydroxyalkyl; R3 and R4 are each independently of the other hydrogen, C1-C4alkyl or C2-C4hydroxyalkyl; R5, R6 and R7 are each independently of the others hydrogen or methyl; R8 is, for example, linear or branched C4-C12alkylene, or phenylene; R9 is, for example, linear or branched C1-C16alkylene, —CH?CH—, —CH?CH—CH2—, C6-cycloalkylene, phenylene or naphthylene; and X, X1 and X2 are each independently of the others OH, Cl, OCH3 or OC2H5; are suitable as photoinitiators that can be incorporated in a formulation to be cured.

Abstract: The Invention relates to novel ketones of formulae (I) and (II) wherein R1, R2, R3 and R4 are, for example, C1-C8alkyl, R5 is, for example, hydrogen, A is CI, Br, -0-R7, —NR8R9 or —S—R16, A? is —O—, —NH— or —NR8—, X and Y are each independently of the other —O—R10 or —N(R11)(R12), n is an integer from 1 to 10, R6 is, for example, an n-valent radical of linear or branched C2-C20alkyl the carbon chain of which may be interrupted by cyclohexanediyl, phenylene, —CH(OH)—, —C(C2H5)(CH2—CH2—OH)—, —C(CH3)(CH2—CH2—OH)—, —C(CH2—CH2—OH)2—, —N(CH3)—, —N(C2H5)—, —N(CH2—CH2—OH)—, —CO—O—, —O—CO—, —P(CH2—CH2—OH)—, —P(O)(CH2—CH2—OH)—, -0-P(O—CH2—CH2—OH)—O—, -0-P(O)(0-CH2—CH2—OH)—O—, —O-cyclohexanediyl-C(CH3)2-Cyclohexanediyl-O—, —O-phenylene-C(CH3)2-phenylene-O—, —O-phenylene-CH2-phenylene-O—, —Si(CH3)2—, -0-Si(CH3)2—O—, —O—Si(CH3)(0-CH3)—O—, —Si(CH3)(R17)—O—Si(CH3)(R18)—, 5-(2-hydroxyethyl)-[1,3,5]triazinane-2,4,6-trione-1,3-diyl and/or by from one to nine oxygen atoms.

Abstract: The invention relates to a process for the preparation of a crystalline isomeric mixture of compounds of formulae (I) and (II) which process comprises the following steps: a) the slow addition of aluminium chloride, in portions, to a solution comprising 1,1,3-trimethyl-3-phenylindan and isobutyric acid halide in a suitable solvent at a reaction temperature of from ?20° C. to 20° C., an isomeric mixture consisting of compounds of formulae (Ia) and (IIa) being obtained; b) enol chlorination of compounds (Ia) and (IIa), an isomeric mixture consisting of compounds of formulae (Ib) and (IIb) being obtained; c) hydrolysis of the chlorinated isomeric mixture from step b). The invention relates also to the preparation of the individual compounds (I) and (II).

Abstract: The invention relates to ?-hydroxy ketones of formula I or IIa; or mixtures of compounds of formula I and II; or mixtures of compounds of formulae Ia and IIa

Abstract: A novel process for the preparation of compounds of formula I by aminolysis of a p-halophenyl alkyl ketone of formula II with a cyclic amine of formula III in water at a temperature of at least 130° C., in which formulae X is a halogen atom and R1, R2 and R3 are as claimed in claim 1, as well as the novel compounds of formula I and their use for the preparation of photoinitiators for the photopolymerisation of ethylenically unsaturated compounds.