摘要:
Titanocenes with .pi.-cyclopentadienyl ligands, in which one or two carbocyclic or heterocyclic aromatic rings are bonded to the metal, the aromatic rings being substituted in at least one of the two ortho-positions relative to the metal-carbon bonds by CF.sub.2 Z (Z=F or substituted or unsubstituted alkyl), are suitable as photoinitiators for the photopolymerization of ethylenically unsaturated compounds. They are distinguished by a high radiation sensitivity, stability to air and thermal effects, and high effectiveness in the range from UV light to visible light.
摘要:
Titanocenes with .pi.-cyclopentadienyl ligands, in which one or two carbocyclic or heterocyclic aromatic rings are bonded to the metal, the aromatic rings being substituted in at least one of the two ortho-positions relative to the metal-carbon bonds by CF.sub.2 Z (Z=F or substituted or unsubstituted alkyl), are suitable as photoinitiators for the photopolymerization of ethylenically unsaturated compounds. They are distinguished by a high radiation sensitivity, stability to air and thermal effects, and high effectiveness in the range from UV light to visible light.
摘要:
The present invention relates to compositions comprising(a) a titanocene photoinitiator of the formula I ##STR1## (b) a 3-ketocoumarin of the formula II ##STR2## in which both R.sup.1, R.sup.2 and R.sup.3 are as defined in claim 1, R.sup.4 is a radical of the formula V ##STR3## R.sup.5 is C.sub.1 -C.sub.20 alkyl, cycloalkyl having 5-7 ring carbon atoms, phenyl or naphthyl which are unsubstituted or substituted by one to three C.sub.1 -C.sub.6 alkyl groups, C.sub.1 -C.sub.6 alkoxy groups or halogen atoms or by one diphenylamino or C.sub.1 -C.sub.6 dialkylamino group, or is C.sub.7 -C.sub.9 aralkyl, a radical --(CH.dbd.CH).sub.a --C.sub.6 H.sub.5 or a radical of the formula V, a is 1 or 2, preferably 1, and R.sup.10, R.sup.11, R.sup.12, R.sup.13 and R.sup.14 independently of one another are hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, phenyl, tolyl, xylyl or benzyl, and R.sup.11 can additionally also be a group --NR.sup.15 R.sup.16 or --OR.sup.15, wherein R.sup.15 and R.sup.16 independently of one another are hydrogen or C.sub.1 -C.sub.6 alkyl, it also being possible for two or three of the radicals R.sup.10, R.sup.11, R.sup.12 and R.sup.13 together with the ring carbon atoms, to which they are attached, to form a fused ring having 5 or 6 ring atoms or a fused ring system having 5-membered or 6-membered rings. The photoinitiator mixtures can be used in combination with ethylenically unsaturated monomers, preferably with photopolymerizable precursors of thermally stable polymers. These mixtures can be processed especially on substrates having surfaces which are strongly scattering or strongly reflecting, to give relief structures with high resolution.
摘要:
A hardenable composition containing:a) a material polymerizable by free radical or cationic polymerization,b) at least one iron compound of the formula I ##EQU1## wherein a is 1 or 2 and q is 1, 2 or 3,L is a divalent to heptavalent metal or non-metal,Q is a halogen atom,m is an integer corresponding to the sum of the values of L and q,R.sup.1 is an unsubstituted or substituted .eta..sup.6 -benzene andR.sup.2 is an unsubstituted or substituted cyclopentadienyl anion, andc) at least one sensitizer for the compound of the formula I,and, in the case of materials polymerizable by free radical polymerization, also d) an electron acceptor as an oxidizing agent, which is also advantageously used concomitantly for the material polymerizable by cationic polymerization. The composition is suitable for the production of protective layers and photographic images.
摘要:
Iron (II)-aromatic compound complexes mixed with electron acceptors as an oxidizing agent are suitable initiators for the polymerization by irradiation of organic material which can be polymerized by cations and/or free radicals. The composition composed of the polymerizable material and of the initiator mixture is suitable for the production of protective coatings and can be used as a photographic recording material.
摘要:
A hardenable composition containing:a) a material polymerizable by free radical or cationic polymerization,b) at least one iron compound of the formula I ##EQU1## wherein a is 1 or 2 and q is 1, 2 or 3,L is a divalent to heptavalent metal or non-metal,Q is a halogen atom,m is an integer corresponding to the sum of the values of L and q,R.sup.1 is an unsubstituted or substituted .eta..sup.6 -benzene andR.sup.2 is an unsubstituted or substituted cyclopentadienyl anion, andc) at least one sensitizer for the compound of the formula I,and, in the case of materials polymerizable by free radical polymerization, also d) an electron acceptor as an oxidizing agent, which is also advantageously used concomitantly for the material polymerizable by cationic polymerization. The composition is suitable for the production of protective layers and photographic images.
摘要:
A process for the production of a protective layer or a relief image on a substrate, wherein a radiation-sensitive layer, consisting of a solid film-forming epoxy resin containing a photoinitiator, which can be activated by radiation, for the polyaddition reaction, is transferred from a support to a substrate, then exposed directly or under a photomask and hardened by the action of heat, after which, if appropriate, the unexposed parts are developed with a solvent. The process is suitable, for example, for the production of printed circuits, solder resist masks and offset printing plates.
摘要:
Novel epoxy acrylates and carboxyl group-containing epoxy acrylates of formulae II and III of the claims that are relatively highmolecular and are chemically crosslinkable can be used in photoresist formulations with the additional use of highly polymerised polymer binders. Such resist formulations are used in particular in the field of printed circuit boards and printing plates, are applicable from aqueous medium, are almost tack-free and have very good edge coverage, especially on conductors.
摘要:
A process for ensuring a neutral vehicle handling during cornering and a simultaneous load change is provided by the operation of a vehicle system having at least one driven axle, an axle differential gear, wheel brakes for the selective deceleration of an individual wheel, a device for recognizing a cornering and a device for recognizing a coasting operation and for generating a signal corresponding to the intensity of the coasting operation. The problem of rear-wheel driven and front-wheel driven vehicles is the vehicle handling during cornering in the coasting operation. As a result, depending on the method of operation, an oversteering or understeering of the vehicle is caused. The process avoids these problems in that, during a cornering, a wheel of the driven axle is decelerated at least as a function of the coasting operation signal such that the moment generated thereby, such as a counter-yawing moment, compensates the yawing moment caused by the cornering during the coasting operation.
摘要:
The invention relates to mixtures containing:a) a cationically polymerizable compound andb) a compound of the formula I[R.sup.1 (Fe.sup.II R.sup.2).sub.a ].sub.q.sup..sym.an anX.sup..crclbar.q (I)in which a is 1 or 2, n is 1 or 2, R.sup.1 is a substituted or unsubstituted .pi.-arene, R.sup.2 is a substituted or unsubstituted .pi.-arene or cyclopentadienyl anion or indenyl anion, q is an integer from 1 to 3 and X is FSO.sub.3.sup.- or a q-valent anion of an organic sulfonic acid or of a carboxylic acid; R.sup.1 can also be a polymeric, aromatic ligand. The invention also relates to the novel compounds of the formula I. The curable mixtures can be processed in particular for the production of coatings having a good resistance to heat.