초록 ▼

A photoinitiator mixture comprising the components (a) a compound of the formula (I) wherein Ar1 and Ar2 independently of each other are  or naphthyl which is unsubstituted or substituted one or more times by R1, R2, R3 or R′; R1 and R3 in-dependently of each other are C1-C4alkyl, C1-C4alkoxy or ha

A photoinitiator mixture comprising the components (a) a compound of the formula (I) wherein Ar1 and Ar2 independently of each other are  or naphthyl which is unsubstituted or substituted one or more times by R1, R2, R3 or R′; R1 and R3 in-dependently of each other are C1-C4alkyl, C1-C4alkoxy or halogen; R2 is hydrogen, C1-C4alkyl, halogen, C1-C4alkoxy or C2-C20alkoxy which is interrupted by one or more O; Q is C1-C4alkylene; R4 is methyl or ethyl; R′ and R″ independently of each other are hydrogen or PG-Y—R′″—X—; PG is a polymerizable group or methyl or ethyl; Y is a direct bond, O or S; X is a direct bond, O or S; R′″ is a direct bond, C1-C20alkylene or C2-C20alkylene which is interrupted by one or more O;(b) one or more compounds of the formula (II) wherein Ar1, Ar2 and Q are as defined above, and R5 is for example C3-C30alkyl which is unsubstituted or substituted and(c) optionally a compound of the formula (III) R5—OH  (III), wherein R5 is as defined above; provides a liquid photointiator.

대표청구항 ▼

1. A liquid photoinitiator mixture comprising the components (a) a compound of the formula (I)  wherein Ar1 and Ar2 independently of each other are  or naphthyl which is unsubstituted or substituted one or more times by R1, R2, R3 or R′;R1 and R3 independently of each other are C1-C4alkyl, C1-C4alko

1. A liquid photoinitiator mixture comprising the components (a) a compound of the formula (I)  wherein Ar1 and Ar2 independently of each other are  or naphthyl which is unsubstituted or substituted one or more times by R1, R2, R3 or R′;R1 and R3 independently of each other are C1-C4alkyl, C1-C4alkoxy or halogen;R2 is hydrogen, C1-C4alkyl, halogen, C1-C4alkoxy or C2-C20alkoxy which is interrupted by one or more O;Q is C1-C4alkylene;R4 is methyl or ethyl;R′ and R″ independently of each other are hydrogen or PG-Y—R′″—X—;PG is a polymerizable group or methyl or ethyl;Y is a direct bond, O or S;X is a direct bond, O or S;R′″ is a direct bond, C1-C20alkylene or C2-C20alkylene which is interrupted by one or more O;(b) one or more compounds of the formula (II)  wherein Ar1, Ar2 and Q are as defined above, andR5 is C3-C30alkyl which is unsubstituted or substituted by one or more of the groups selected from OH and or R5 is C2-C28alkyl which is interrupted by one or more O or C3-C8cycloalkylene and which interrupted C2-C28alkyl is unsubstituted or substituted by one or more of the groups selected from OH and  and(c) optionally a compound of the formula (III) R5—OH  (III), wherein R5 is as defined above. 2. The liquid photoinitiator mixture according to claim 1, wherein the mixture comprises 0.1-25% of component (a), 75-99.9% of component (b) and 0-25% of component (c). 3. The liquid photoinitiator mixture according to claim 1, wherein the compounds of the formula (I), (II) and (III) R1, R2 and R3 are C1-C4alkyl;R′ and R″ are hydrogen;Q is methylene, andR5 is C3-C30alkyl which is unsubstituted or substituted by  or R5 is C2-C28alkyl which is interrupted by C3-C8cycloalkylene and which interrupted C3-C28alkyl is substituted by 4. The liquid photoinitiator mixture according to claim 1, further comprising a further photoinitiator (C). 5. A photopolymerizable composition comprising (A) at least one monomeric or oligomeric ethylenically unsaturated photopolymerizable compound and(B) at least one liquid photoinitiator mixture according to claim 1. 6. The photopolymerizable composition according to claim 5, which further comprises at least one component selected from the group consisting of a photoinitiator (C) and other customary additives (D). 7. The photopolymerizable composition according to claim 6, wherein the additional photoinitiator (C) is selected from the group consisting of alpha-hydroxy ketones, benzophenone, substituted benzophenone compounds, benzildimethylketal, phenylglyoxylate compounds and alpha-amino ketone compounds. 8. The photopolymerizable composition according to claim 5, comprising 0.05 to 15% by weight of the liquid photoinitiator mixture (B) or the photoinitiators (B)+(C), based on the composition. 9. A process for the photopolymerization of monomeric, oligomeric or polymeric compounds containing at least one ethylenically unsaturated double bond, which comprises adding to the above mentioned compounds a liquid photoinitiator mixture according to claim 1 and irradiating the resulting composition with electromagnetic radiation. 10. A process according to claim 9 for producing coatings, printing inks, printing plates, adhesives, dental compositions, gel coats, photoresists for electronics, for encapsulating electrical and electronic components, for producing magnetic recording materials, for producing micromechanical parts, waveguides, optical switches, plating masks, etch masks, colour proofing systems, glass fibre cable coatings, screen printing stencils, for producing three-dimensional objects by a rapid prototyping or additive manufacturing technology based on a photolithographic or polymer jetting process using light curable materials, for producing image recording material, for holographic recording, for producing microelectronic circuits or for producing decolorizing materials. 11. A coated substrate which is coated on at least one surface with the composition according to claim 5 and irradiated with electromagnetic radiation. 12. A polymerized or crosslinked composition obtained by curing the polymerizable composition according to claim 5. 13. A process for the preparation of the liquid photoinitiator mixture as defined in claim 1, comprising reacting the compound of the formula (I), with an alcohol of the formula (III) R5—OH  (III), wherein R5 is as defined in claim 1,in the presence of a catalyst and taking means to remove the alcohol of the formula (IV) which is formed during the reaction R4—OH  (IV), wherein R4 is methyl or ethyl. 14. The photopolymerizable composition according to claim 5, comprising 0.1 to 5% by weight of the liquid photoinitiator mixture (B) or the photoinitiators (B)+(C), based on the composition.