Ciba-geigy Corporation

Ciba Specialty Chemicals Corporation

Vantico Limited

Giba-geigy Corporation

Sameer H Eldin

Martin Roth

Friedrich Stockinger

Peter Flury

Abul Iqbal

Friedrich Lohse

Qian Tang

Robert Peter Peyer

Peter Grieshaber

Alfred Renner

Frans Setiabudi

Sheik A Zahir

Carl W Mayer

Kazuhiko Kunimoto

Charles E Monnier

Wolfgang Seiz

Junji Otani

Ewald Forster

Brian Gerrard Devlin

Francedillaois Rime

Klaus Petschel

Dean Tallak Behm

Andreas Kramer

Zhimin Hao

Kurt Dietliker

Rolf Schmid

Abdul-Cader Zahir

Bruno Schreiber

Bernd Lamatsch

Takashi Deno

Urs Gruber

Milos Rusek

Claus W Rabener

Hanspeter Gysin

Jurg Maurer

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.

Hardeners for epoxy resins

Core/shell particles comprising a core comprising an elastomer having a T,value of <0&deg; 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.

Core/shell particles, and curable epoxy resin composition comprising same

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.

Fluorescent host-guest-system

Curable suspensions of an epoxy resin formulation comprising

Core/shell polymer toughener suspended in epoxy resin

Diketopyrrolopyrroles of formula I ##STR1## wherein R.sub.1 is a radical of formula II

Polymerizable diketopyrrolopyrroles

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').

Fluorescent compositions and their use

Heterogeneous photo-initiators, photopolymerizable compositions and

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

Polymerizable diketopyrrolopyrroles and polymers prepared therewith

Core/shell particles comprising a core comprising an elastomer having a T.sub.G value of &lt;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.

Core/shell particles, and curable epoxy resin compositions comprising

Reaction products of amine and a carboxyl functional microgel

Polymerisable diketopyrrolopyrroles

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.

Epoxy resin with anhydride, toughener and active hydrogen-containing

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,

The present invention relates to a curable mixture which is useful in the formation of castings and which contains (a) an epoxy resin and (b) a mixture of oligomeric cyanoguanidines obtained by the reaction between a monoisocyanate and a diisocyanate to give a carbodiimide which is subsequently reacted with cyanamide.

Oligomeric cyanoguanidines

Growing community of inventors

Fribourg, Switzerland

Sameer H Eldin