Ciba-geigy Corporation

Rolf Schmid

Friedrich Lohse

Ursula Kreibich

Ferdinand Gutekunst

Werner Stauffer

Willy Fatzer

Hans Batzer

Michael Fischer

Helmut Zondler

Andre Schmitter

Hans Lehmann

Alfred Renner

Sameer H Eldin

Abdul-Cader Zahir

Dieter Baumann

Ewald Forster

Heinz Rembold

Guiseppe Lottanti

Heat-curable compositions of matter which are stable on storage and which contain

Curable epoxy resin compositions of matter containing a thermoplastic

Storage-stable heat-curable mixtures are described which contain

Mixtures containing polymides alkenyphenols and either epoxide

There are described novel imidazolides (N-acylimidazoles) of the formula I ##STR1## wherein R.sub.1 is methyl, ethyl or isopropyl,

Novel imidazolides and their use as curing agents for polyepoxide

Heat-curable mixtures, containing (a) an epoxide resin having on average more than one epoxide group in the molecule, (b) an allyl-substituted or methallyl-substituted imide of the formula I ##STR1## in which E is allyl or methallyl, G is hydrogen or methyl, n is 1 or 2, and R is hydrogen, alkyl, alkenyl, cycloalkyl, aryl, benzyl or arylene, and (c) a curing catalyst, have good storage stability and processability and produce moulded materials having high mechanical strength values and good resistance to heat.

Curable mixtures containing an epoxide resin, an imide and a curing

One-component systems which are stable on storage and can be converted to crosslinked epoxide resins on heating and which contain a crystalline epoxide resin with, on average, more than one epoxide group per molecule and a melting point between 40.degree. and 150.degree. C., and, homogeneous distribution, a curing catalyst.

One component systems based on crystalline epoxide resins

One-component systems based on crystalline epoxide resins

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

The use of compounds of the formula ##STR1## in which m is a number from 3 to 10, X is a grouping of the formula in which R is an alkyl having 4 to 10 C atoms or a phenyl which is unsubstituted or substituted by chlorine, bromine or alkyl or alkoxy each having 1 to 3 C atoms, and Y is a hydrogen atom or has the meaning defined for X, which are obtained by adding on 1 or 2 mols of an aliphatic or aromatic monoglycidyl ether to 1 mol of a dimethylaminoalkylamine, as a curing catalyst for epoxide resins or as a curing accelerator in curable mixtures consisting of epoxide resins and polycarboxylic anhydrides or polyhydric phenols.

Curable epoxide resin mixtures

Apparatus comprising a solar collector, three heat exchangers operating at different temperature levels and connected in series on the service-water side, a latent-heat store, various lines and valves, a circulating pump and an electrical operation-control circuit responsive to the temperatures sensed by various temperature sensors located in the above mentioned components. The two heat-exchangers operating at the higher temperature levels are each by-passed by a mixing valve on the service-water side. Depending on the solar radiation or the temperature of the circulating medium, the heat exchangers at the higher or lower temperature level or combinations thereof are successively connected to the circulating medium.

Apparatus for heating water by solar heat

The mixture contains as reinforcing agent needle-shaped crystals insoluble in epoxide resin, the crystals being for example of aluminium oxide or hydroxide and acetic acid, propionic acid, benzoic acid, adipic acid or sebacic acid. These crystals improve specific mechanical properties of the elastomeric polymers obtained by curing the epoxide resin/curing agent mixture, without the elastomeric properties being lost.

Curable mixture for producing reinforced elastomeric plastics based on

Storable, solid mixture of (a) a long-chain epoxide resin which is free from ester groups and has a high epoxide equivalent weight, (b) an epoxide resin which is free from ester groups, contains cyclic structure and two to three epoxide groups in the molecule and has a low epoxide equivalent weight, (c) a triphenol and (d) a curing accelerator and, if desired, a blowing agent. Laminates, foams, compression moulded articles and adhesive bonds which are stable to hydrolysis, resistant to heat distortion and flexible are obtained on heating.

Storable, solid mixture for the preparation of plastics which are based

The invention relates to the use of crystalline resins as storage material in latent heat accumulators. Crystalline synthetic resins replace the crystalline inorganic salt of the known latent heat reservoirs. Preferably epoxide resins, polyurethane resins and polyester resins, which contain very specific long-chain polyester molecule moieties, are used. The crystalline synthetic resins have one or more, preferably two, crystallite melt temperatures.

Use of crystalline, crosslinked synthetic resins as a storage material

Mixtures of approximately equivalent amounts of (a) a glycidylated hydantoin and (b) a mononuclear phenol with 2 or 3 phenolic hydroxyl groups, at least one of the components (a) or (b) being trifunctional. They additionally contain a curing accelerator and on heating form mechanically good and flexible plastics which are stable to hydrolysis and can be used as building materials and foams, for the finishing and coating of textile material and for the preparation of water-permeable membranes.

Mixtures of glycidylated hydantoins and polyhydric phenols and the use

A liquid mixture of a glycidyl ether of a phenol novolac with, on average, more than 2 glycidyl groups in the molecule and a dihydric phenol in approximately equivalent amounts. The mixture is used to prepare cured hydrolysis-resistant plastics by casting the resin mixture or laminating, impregnating or bonding substrates.

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Gelterkinden, Switzerland

Rolf Schmid