Abstract: Compounds of formula (I), in which X is oxygen or sulfur, R.sub.1, R.sub.2 and R.sub.3 independently of one another are a group (a), C.sub.2 -C.sub.8 alkenyl, phenyl which is unsubstituted or is substituted from one to four times with C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.12 alkoxy, C.sub.1 -C.sub.6 alkylthio and/or halogen, or are naphthyl which is unsubstituted or is substituted from one to four times with C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.12 alkoxy, C.sub.1 -C.sub.6 alkylthio and/or halogen, or are biphenyl which is unsubstituted or is substituted from one to four times with C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.12 alkoxy, C.sub.1 -C.sub.6 -alkylthio and/or halogen, or R.sub.1, R.sub.2 and R.sub.3 independently of one another are an O-, S- or N-containing 5- or 6-membered heterocyclic ring, R.sub.1 is in addition a group of formula (II), or R.sub.1 and R.sub.2 are linked to form a ring containing 4 to 10 carbon atoms which is unsubstituted or substituted by 1 to 6 C.sub.1 -C.sub.

Abstract: Ethylenically unsaturated polymerisable compounds can be cured with daylight or with light sources equivalent to daylight by using as hardener a photoinitiator of formula I ##STR1## wherein R.sub.1 is C.sub.1 -C.sub.12 alkyl, cyclopentyl, cyclohexyl, unsubstituted phenyl, naphthyl or biphenyl,R.sub.2 and R.sub.3 are each independently of the other C.sub.1 -C.sub.12 alkyl,R.sub.4 is hydrogen or C.sub.1 -C.sub.12 alkyl, andR.sub.5 is hydrogen or methyl.

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: Compounds of the formula I ##STR1## in which R.sub.1 is C.sub.1 -C.sub.18 alkyl, cyclopentyl or cyclohexyl, and R.sub.2 and R.sub.3, independently of one another, are phenyl which is unsubstituted or monosubstituted to tetrasubstituted by halogen, C.sub.1 -C.sub.4 alkyl and/or C.sub.1 -C.sub.4 alkoxy, with the proviso that R.sub.1 is not decyl if R.sub.2 and R.sub.3 are chlorine-substituted phenyl, are suitable for the photopolymerisation of compounds containing ethylenically unsaturated double bonds.

Abstract: Compounds of the formula I ##STR1## in which R.sub.1 is C.sub.1 -C.sub.18 alkyl, cyclopentyl or cyclohexyl, and R.sub.2 and R.sub.3, independently of one another, are phenyl which is unsubstituted or monosubstituted to tetrasubstituted by halogen, C.sub.1 -C.sub.4 alkyl and/or C.sub.1 -C.sub.4 alkoxy, with the proviso that R.sub.1 is not decyl if R.sub.2 and R.sub.3 are chlorine-substituted phenyl, are suitable for the photopolymerization of compounds containing ethylenically unsaturated double bonds.

Abstract: A radiation curable composition contains as light stabiliser a UV absorber of formula I ##STR1## wherein R is hydrogen or C.sub.1 -C.sub.18 alkyl, R.sub.1 and R.sub.2 are each independently of the other H, OH, C.sub.1 -C.sub.12 alkyl, halogen or halomethyl,R.sub.3 and R.sub.4 are each independently of the other H, OH, C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.18 alkoxy or halogen, andR.sub.5 and R.sub.6 are each independently of the other H, C.sub.1 -C.sub.12 alkyl or halogen. These UV absorbers are substantially non-yellowing.

Abstract: Bisacylphosphine sulfides of formula I ##STR1## wherein R.sub.1 is unsubstituted C.sub.1 -C.sub.18 or C.sub.1 -C.sub.8 alkyl which is substituted by phenyl, --CN, C.sub.1 -C.sub.12 alkoxy or halogen, C.sub.2 -C.sub.18 alkenyl, unsubstituted C.sub.5 -C.sub.8 cycloalkyl or C.sub.5 -C.sub.8 cycloalkyl which is substituted by C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.12 alkoxy or halogen, unsubstituted C.sub.6 -C.sub.12 aryl or C.sub.6 -C.sub.12 aryl which is substituted by halogen, C.sub.1 -C.sub.12 alkyl or C.sub.1 -C.sub.12 alkoxy, or a 5- or 6-membered aromatic heterocyclic radical which contains oxygen, sulfur and/or nitrogen and is unsubstituted or substituted by halogen, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy, andR.sub.2 and R.sub.3 are each independently of the other unsubstituted C.sub.1 -C.sub.18 alkyl or C.sub.1 -C.sub.8 alkyl which is substituted by phenyl, halogen or C.sub.1 -C.sub.12 alkoxy, C.sub.2 -C.sub.6 alkenyl, unsubstituted C.sub.5 -C.sub.8 cycloalkyl or C.sub.5 -C.sub.

Abstract: An electric motor possesses a motor housing, preferably a pressure-resistant one, wherein a stator is installed and a rotor is journaled for rotation. The pressure-resistant motor housing is preferably filled with gas, more particularly a gas under high pressure of preferably between 5 and 150 bar or greater. In order to reduce heat dissipation in the interior of the electric motor, a capsule is provided, which surrounds the rotor rods at the drive end and/or at the non-drive end.

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 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: Ketones of the formula II ##STR1## with Ar, R.sup.1 and R.sup.2 as indicated below, can be hydroxylated, readily and in high yields, in the .alpha.-position using tetrahalogenomethanes and alkali metal hydroxides under phase-transfer conditions.