Ciba-geigy Corporation

Ciba-geigy Ag

Willy Fatzer

Friedrich Lohse

Rolf Schmid

Hans Batzer

Jurgen Habermeier

Daniel Porret

Dieter Baumann

Aluminium monohydroxide salts of a carboxylic acid which are free from water of crystallization and have the formula ##STR1## or contain the structural element of the formula ##STR2## in which R is methyl, ethyl or phenyl or R.sup.1 is the divalent group --C.sub.n H.sub.2n --, in which n is a number from 3 to 10, and which can also be in the form of a dimer, have an acicular to rod-shaped crystal form. They are suitable as fillers for polymers, especially as reinforcing fillers for elastomeric epoxide resins.

Acicular aluminium salts of carboxylic acids and processes for their

Adducts containing epoxide groups, which have been (so-called) 'advanced' with polyesters containing rings are obtained by reacting adducts containing epoxide groups, which have been obtained by reaction of certain long-chain aliphatic polyesters with diepoxide compounds in excess, with polyesterdicarboxylic acids, containing carbocyclic or heterocyclic rings, while heating, 0.3 - 0.5 carboxyl group equivalent of the polyester-dicarboxylic acid containing rings being employed per 1 epoxide equivalent of the adduct containing epoxide groups. Curing of the (so-called) 'advanced' adducts containing epoxide groups gives flexible moulded materials which are distinguished, in particular, by high tear propagation resistance.

Adducts, containing epoxide groups, based on polyesterdicarboxylic acids

Curable epoxide resin mixtures based on long-chain adducts containing epoxide groups, which are obtained by reaction of certain long-chain aliphatic polyesters with an excess of diepoxide compounds, polycarboxylic acid anhydrides and linear polyester-dicarboxylic acids containing carbocyclic or heterocyclic rings, which mixtures contain, per 1 equivalent of epoxide groups, 0.2-0.8 mol of polycarboxylic acid anhydride and 0.8-0.2 equivalent of carboxyl groups of the polyester-dicarboxylic acid. Curing of these epoxide resin mixtures gives flexible moulding materials which are distinguished by high tear propagation resistance.

Composition of epoxide resins, polycarboxylic acid anhydrides and

New diglycidyl compounds of mononuclear, five-membered or six-membered, unsubstituted or substituted, hydroxyalkylated N-heterocyclic compounds, produced by addition of formaldehyde or acetaldehyde to mononuclear, five-membered or six-membered, unsubstituted or substituted, N-heterocyclic compounds, for example hydantoin or dihydrouracil, to monohydroxyalkyl compounds, and subsequent glycidylation of the OH group and NH group to give the corresponding glycidyl compounds.

Diglycidyl compounds of N-heterocyclic compounds

Curable epoxide resin mixtures based on adducts, containing epoxide groups, which are obtained by reaction of certain long-chain aliphatic polyesters with an excess of diepoxide compounds, and linear or slightly branched polyesters, containing carbocyclic or heterocyclic rings and possessing 3 or 4 terminal carboxyl groups, and having an average molecular weight of 600 - 6,000, 0.7 - 1.2 equivalents of carboxyl groups being present in the curable mixture per 1 equivalent of epoxide groups. Curing these epoxide resin mixtures gives flexible moulded materials which are distinguished by high tear propagation resistance.

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Bottmingen, Switzerland

Willy Fatzer