Societe Nationale Des Poudres Et Explosifs

Office National D'etudes Et De Recherches Aerospatiales

Societe Nationale D'etude Et De Construction De Moteurs D'aviation

Marcel Ropars

Bertrand Bloch

Michel Vaultier

Michel Parlier

Jean-Claude Cavalier

Jean-Marie Jouin

Eric Framery

Textile preforms sheathed in a boron nitride coating, composites incorporating them and their preparation

The object of the present invention are new thermoset resins having quickened curing, a process for their preparation, and their applications. The resins according to the invention consist, at least in part, of the products resulting from the polycondensation of one or more pyridine derivatives containing at least two methyl groups in the 2, 4 or 6 positions, with one or more aromatic dialdehydes, and the addition of one or more additives consisting of phenol compounds. These resins are used to the fabrication of composite materials.

Thermoset polymers and prepolymers with rapid curing, obtained by

The object of the invention are new thermoset polymers and prepolymers, a process for their preparation, and their uses. The new thermoset prepolymers consist, at least in part, of the polycondensation products of one or more pyridine derivatives containing at least two activated methyl groups with one or more aromatic monoaldehydes containing at least one hydroxyl group. These prepolymers are used to prepare composite materials, in particular laminates, that can be used at high temperatures.

Thermoset polymers and prepolymers obtained by polycondensation of alkyl

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Rocquencourt, France

Marcel Ropars