Abstract: 1,2-Disulfones are particularly suitable as thermally and photochemically activatable latent acid catalysts for binder systems which contain at least one acid-curable component.

Abstract: 1,2-Disulfones are particularly suitable as thermally and photochemically activatable latent acid catalysts for binder systems which contain at least one acid-curable component.

Abstract: Compounds of the formulaRG--A--INwherein IN is a photoinitiator basic structure A is a spacer group and RG is a functional reactive group can be employed as coreactive photoinitiators for photo-polymerization of systems containing ethylenically unsaturated compounds.

Abstract: Compounds of the formulaRG--A--INwhereinIN is a photoinitiator basic structureA is a spacer group andRG is a functional reactive group can be employed as coreactive photoinitiators for photopolymerization of systems containing ethylenically unsaturated compounds.

Abstract: 1,2-Disulfones are particularly suitable as thermally and photochemically activatable latent acid catalysts for binder systems which contain at least one acid-curable component.

Abstract: Compounds of the formulaRG--A--INwhereinIN is a photoinitiator basic structureA is a spacer group andRG is a functional reactive groupcan be employed as coreactive photoinitiators for photopolymerization of systems containing ethylenically unsaturated compounds.

Abstract: The invention relates to a microdroplet or network system which is provided with active matrix addressing and whose liquid-crystal mixture contains one or more compounds of the formula I and in which the polymerization of the optically transparent medium is initiated by a photoinitiator which forms free radicals.

Abstract: Radiation-curable two-layer systems containing immobilized photoinitiators are suitable for the production of coatings of constant thickness and good adhesion, and relief structures of high resolution and edge steepness.

Abstract: The invention relates to photoinitiators having a combined structure ##STR1## and their use as photoinitiators in the photopolymerization of ethylenically unsaturated compounds or binder systems containing them.

Abstract: Compounds of the general formula I ##STR1## wherein Z is CR.sup.1 R.sup.2 (OR.sup.3) or phenyl,R.sup.1 being H, C.sub.1-6 -alkyl or phenyl,R.sup.2 being H, C.sub.1-6 -alkyl or C.sub.1-6 -alkoxy andR.sup.3 being H, C.sub.1-6 -alkyl or C.sub.1-6 -alkanoyl andZ' is Y-[(CH.sub.2).sub.m -X].sub.n -,X being CH.sub.2 or 0,Y being OH; COOH or SO.sub.3 H including the alkali metal, alkaline earth metal or ammonium salts thereof and also the salts thereof with organic nitrogen bases; or NRR' in which R and R' are in each case H, C.sub.1-20 -alkyl or C.sub.1-4 -hydroxyalkyl, if appropriate quaternized or in the form of the acid addition salts, andn and m each being the numbers 1-4, are excellently suitable as photoinitiators for the photopolymerization of ethylenically unsaturated compounds, in particular in aqueous systems.

Abstract: The invention relates to aqueous photoinitiator dispersions for incorporation into aqueous dispersions of radiation-curable binder systems.

Abstract: The invention relates to copolymerizable photoinitiators of the general formula I ##STR1## in which R.sup.1 and R.sup.2 are each H, C.sub.1 -C.sub.6 -alkyl or phenyl,R.sup.3 is H, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkanoyl or the group Z,R.sup.4 is H, halogen, C.sub.1 -C.sub.12 -alkyl, C.sub.1 -C.sub.12 -alkoxy, C.sub.1 -C.sub.12 -alkylthioor the group --X[(CH.sub.2 --CH.sub.2 --O).sub.n --Z].sub.m andX os O, S or Nn is an integer from 0 to 4,m is the integer 1 for X=O and S or the integer 1 or 2 for X=N,Z is the group --CO--CR.dbd.CR'R"with R, R', R" each being H or CH.sub.3, always at least one of the R.sup.3 or R.sup.4 groups containing the group Z.

Abstract: Radiation-curable two-layer systems containing immobilized photoinitiators are suitable for the production of coatings of constant thickness and good adhesion, and relief structures of high resolution and edge steepness.

Abstract: Compounds of the general formula I ##STR1## wherein Z is CR.sup.1 R.sup.2 (OR.sup.3) or phenyl,R.sup.1 being H, C.sub.1-6 -alkyl or phenyl,R.sup.2 being H, C.sub.1-6 -alkyl or C.sub.1-6 -alkoxy andR.sup.3 being H, C.sub.1-6 -alkyl or C.sub.1-6 -alkanoyl andZ' is Y--[(CH.sub.2).sub.m --X].sub.n --,X being CH.sub.2 or 0,Y being OH; COOH or SO.sub.3 H including the alkali metal, alkaline earth metal or ammonium salts thereof and also the salts thereof with organic nitrogen bases; or NRR' in which R and R' are in each case H, C.sub.1-20 -alkyl or C.sub.1-4 -hydroxyalkyl, if appropriate quaternized or in the form of the acid addition salts, andn and m each being the numbers 1-4,are excellently suitable as photoinitiators for the photopolymerization of ethylenically unsaturated compounds, in particular in aqueous systems.

Abstract: Radiation curable adhesives which are based on ionically polymerizable epoxide systems and ionic photoinitiators of the triarylsulfonium complex salt type additionally also contain at least one ethylenically unsaturated substance which can be polymerized by free radicals and at least one free radical photoinitiator. These exhibit particular advantages in the gluing of optical glass components. The gluing can be partially hardened with UV radiation until fixing of the glass components is achieved. In this partially hardened state, the components can be adjusted. Complete hardening is then carried out with UV radiation.

Abstract: Hydroxyalkylphenones of formula I ##STR1## wherein R is hydrogen, halogen, alkyl of 1 to 18 C atoms, alkoxy of 1 to 4 C atoms or ##STR2## R.sub.a is hydrogen, halogen or alkyl of 1 to 4 C atoms; R.sup.1 and R.sup.2 (a) are each alkyl of up to 14, together 4 to 16, C atoms or together are alkylene of 4 to 8 C atoms, if R is hydrogen, halogen, alkyl of 1 to 6 C atoms or alkoxy of 1 to 4 C atoms, or (b) are each alkyl of 1 to 6 C atoms or together are alkylene of 2 to 8 C atoms, if R is alkyl of 3 to 18 C atoms or ##STR3## R.sup.3 and R.sup.4 are each alkyl of 1 to 6 C atoms or together are alkylene of 2 to 8 C atoms and Z is --CO--, --CH.sub.2 --, --O-- or --S--; are suitable as initiators for radiation curing aqueous prepolymer dispersions. They have good stability in aqueous systems and also upon removal of the water from these systems, and they have a considerably increased reactivity in their ability to initiate the curing of aqueous systems curable by radiation.

Abstract: Pigmented substantially crack-free casein plastic compositions containing a minor, luster-imparting quantity of coated mica platelets, wherein at least 75% of the pigment particles possess an average platelet size of below 10 .mu.m., a thickness of about 0.1 to 0.7 .mu.m. and a ratio of diameter to thickness of about 10 to 200.