Abstract: Reaction products of a microgel that contains carboxylic acid groups with a nitrogen-containing base have a high latency and high stability towards mechanical influences and are suitable as hardeners for one-component epoxy resin systems.

Abstract: Core/shell particles comprising a core comprising an elastomer having a TG value of <0° C., onto which a shell of a crosslinked copolymer is grafted, where the proportion of the crosslinking component in the copolymer of the shell is from 5 to 90% by weight, based on the total amount of the comonomers of the shell copolymer, are suitable as toughening agents for epoxy resins, with which they have good compatibility.

Abstract: Composition comprising a solid organic support material to which either directly or via a bridging group, are covalently linked fluorescent host chromophores and fluorescent guest chromophores, wherein the fluorescence emission spectrum of the host chromophore overlaps with the absorption spectrum of the guest chromophore, wherein the host chromophore is selected from the group consisting of benzo[4,5]imidazo[2,11-a]isoindol-11-ones.

Abstract: Solid-state fluorescent composition comprising at least one host chromophore selected from the group consisting of a benzo[4,5] imidazo[2,1-a]isoindol-11-ones and an effective amount of at least one guest chromophore, and if desired a polymer C, wherein the emission spectrum of the host chromophore overlaps with the absorption spectrum of the guest chromophore, and wherein (a1) the host chromophore is covalently linked to a polymer backbone A ("host polymer"), and/or (a2) the guest chromophore is covalently linked to a polymer backbone B ("guest polymer").

Abstract: 1,4-Diketopyrrolopyrroles of the formula ##STR1## in which A and B independently of one another are a group of the formula ##STR2## R.sub.1 is a long-chain radical containing a reactive group capable of polymerization, andR.sub.2 is C.sub.1 -C.sub.6 alkyl, ##STR3## or R.sub.1. For the definition of the radicals R.sub.3 -R.sub.9, refer to claim 1.The novel diketopyrrolopyrroles are suitable for preparing colored polymers with unexpectedly advantageous color effects.

Abstract: Heterogeneous photoinitiator in microparticle form, which consists of a finely divided substrate material to which identical or different photoinitiators are covalently bonded. The photoinitiators are suitable for the radiation-induced polymerization of photopolymerizable or photocrosslinkable monomers for the production of moldings, protective coats and relief images.

Abstract: Core/shell particles comprising a core comprising an elastomer having a T.sub.G value of <0.degree. C., onto which a shell of a crosslinked copolymer is grafted, where the proportion of the crosslinking component in the copolymer of the shell is from greater than 5 to 90% by weight, based on the total amount of the comonomers of the shell copolymer, are suitable as toughening agents for epoxy resins, with which they have good compatibility.

Abstract: Reaction products of a microgel that contains carboxylic acid groups with a nitrogen-containing base have a high latency and high stability towards mechanical influences and are suitable as hardeners for one-component epoxy resin systems.

Abstract: 1,4-Diketopyrrolopyrroles of the formula ##STR1## in which A and B independently of one another are a group of the formula ##STR2## R.sub.1 is a long-chain radical containing a reactive group capable of polymerization, and R.sub.2 is C.sub.1 -C.sub.6 alkyl, ##STR3## or R.sub.1. The novel diketopyrrolopyrroles are suitable for preparing coloured polymers with unexpectedly advantageous colour effects.

Abstract: 1,4-diketopyrrolopyrroles of the formula ##STR1## in which R.sub.1 and R.sub.2 independently of one another are hydrogen, C.sub.12 -C.sub.24 alkyl, C.sub.6 -C.sub.24 alkyl which is interrupted one or more times by O or S, or are a group of the formula ##STR2## in which R.sub.5 is C.sub.4 -C.sub.18 alkyl or C.sub.5 -C.sub.10 cycloalkyl,R.sub.3 is a polymerizable reactive group,R.sub.4, if R.sub.1 and R.sub.2 are hydrogen, is C.sub.6 -C.sub.24 alkyl which is attached directly or by way of O or S to the benzene ring and is uninterrupted or is interrupted one or more times by O or S, andR.sub.4, if R.sub.1 and/or R.sub.2 are C.sub.12 -C.sub.24 alkyl, is C.sub.6 -C.sub.24 alkyl which is interrupted one or more times by O or S or is a group ##STR3## hydrogen, halogen, methyl, methoxy, CN or phenyl, or is the same as R.sub.3.