Ciba-geigy Corporation

Bruno Schreiber

Alfred Renner

Theobald Haug

Ewald Forster

Wolfgang Seiz

Hermann Diethelm

Sameer H Eldin

Jurgen Habermeier

Friedrich Lohse

Andre Schmitter

Imre Forgo

Polymers formed from anhydrides of the formula I ##STR1## in which R.sub.1 and R.sub.2 independently of one another are hydrogen or methyl. The novel polymers are suitable for use as curing agents for polyepoxide compounds.

Polymers formed from allyl-substituted or methallyl-substituted,

The invention relates to epoxy resin moulding compositions containing

Self-extinguishing, track-resistant epoxy resin moulding composition and

The invention relates to heat curable epoxy resin compositions consisting of an epoxy resin containing, on average, more than one epoxide group per molecule, an aromatic onium salt as catalyst, a copper complex compound as co-catalyst, and a light stabilizer. These compositions are less sensitive to UV irradiation and have a good shelf life at room temperature as well as a good high temperature reactivity.

Heat curable epoxy resin compositions

The invention relates to epoxy molding compositions consisting of diglycidyl ethers of bisphenols, anhydride hardeners and reinforcing fillers. At least half the total amount of filler consists of wollastonite. These molding compositions have greater resistance to cracking, which is particularly advantageous in encasing metal parts.

Crack-resistant epoxy resin molding composition with wollastonite

A moulding composition consisting of an epoxy resin adduct of a low molecular diglycidyl ether of bisphenols and an aromatic diamine together with a filler, an accelerator, and an aromatic polyol as hardener. Mouldings having excellent resistance to cracking can be obtained from this moulding composition.

Epoxy resin moulding compositions

According to the invention, polyaddition products containing imide groups are manufactured by reacting certain polyimides (preferably maleimides) with polyhydric phenols in the presence of basic compounds. The preferred embodiment (A) relates to the use of catalysts as basic compounds. In particular, tertiary, secondary or mixed tertiary-secondary amines can be used. A further embodiment (B) relates to the use of primary polyamines as basic compounds. In the latter case, the polyamine participates in the polyaddition mechanism, that is to say the molecules are incorporated into the polyaddition products. In this latter case, catalysts can also be used additionally. The invention can be utilized particularly in the fields of surface protection, the electrical industry, laminating processes and the manufacture of foamed plastics, and in the building industry.

Process for the manufacture of polyaddition products containing imide

Reaction products, containing phenolic hydroxyl groups, of polysiloxanes and polyphenols are obtained by reacting alkoxy-terminated or acyloxy-terminated polysiloxane compounds with polyphenols at elevated temperature, employing 1.2 to 10 equivalents of phenolic hydroxyl groups per 1 equivalent of alkoxy group or acyloxy group. The reaction products containing hydroxyl groups can be used for curing and modifying epoxide resins and give flexible, hydrophobic plastics of valuable mechanical and dielectric properties.

Reaction products of polysiloxanes and polyphenols

Storage-stable epoxide moulding compositions containing solid pre-adducts of triglycidyl isocyanurate and amine curing agents, fillers and release agents. After curing, these compositions form tracking-resistant plastics of high heat distortion point.

Storage-stable epoxide moulding compositions

The invention relates to storage-stable, quick-curing epoxide resin moulding materials containing:

Storage-stable, quick-curing epoxide resin moulding materials

Storage-Stable moulding compositions which contain solid adducts, containing epoxide groups, of triglycidyl-bis-hydantoins or triglycidyl-bis-dihydrouracils and organic compounds possessing several active hydrogen atoms, solid adducts, containing amino groups, of cycloaliphatic, heterocyclic or aromatic polyamines as curing agents, and fillers. The moulding compositions are used for the manufacture of light-stable and tracking-resistant plastics.

Growing community of inventors

Aesch, Switzerland

Bruno Schreiber