Aerospatiale Societe Nationale Industrielle

Ciba-geigy Corporation

Patrice Dourthe

Yves Camberlin

Nicole Pastureau

Evelyne Chataignier

Daniel Beziers

Daniele Beziers

Frederic Alexandre Boursereau

The invention relates to compositions of ionization-setting maleic resins and their use for manufacture of composite materials with a fibrous reinforcement. These compositions comprise a maleic resin and a reactive diluent made up of at lest one compound chosen from among dipentaerythritol pentacrylate and hydroxyethyl methacrylate, the total quantity of reactive diluent being between 10 and 70 parts by weight per 100 parts by weight of maleic resin. They may also comprise a plasticizer such as bis-allylic resin. With these compositions it is possible to obtain composite materials set by ionization without additional post heat treatment.

Compositions of maleic resins that can be set by ionization and their

Process for the hardening, curing or setting of a bis-maleimide resin and a composite material using said resin. The setting process according to the invention of a basic resin A having at least one bis-maleimide monomer consists of adding to the basic resin A, prior to the use thereof, at least one reactive diluent B consisting of a monomer having a copolymerizable vinyl termination with the basic resin A when subjecting the mixture of the basic resin A and the diluent B to the action of ionizing radiation (34), the total quantity of the diluent B being such that the maleimide functions of the basic resin A are consumed following the ionizing radiation action and being chosen in the range 10 to 50 parts by weight for 100 parts by weight of the basic resin A. This resin is more particularly intended for the production of a composite material (16, 18) having a fibrous reinforcement (26, 28, 30, 32) by filamentary winding.

Process for the hardening under ionizing radiation of a bis-maleimide

Prepolymers having imide groups

A mandrel for manufacturing a hollow composite material body. The mandrel is formed by a homogeneous graphite felt block whose fibers are embedded in a pyrolysis carbon matrix. The densification of the arrangement of fibers forming the hollow body is carried out in a neutral atmosphere.

Mandrel for manufacturing a hollow composite material body

A mandrel for manufacturing a hollow composite material body. The mandrel is formed by an homogeneous graphite felt block whose fibers are embedded in a pyrolysis carbon matrix. The densification of the arrangement of fibers forming the hollow body is carried out in a neutral atmosphere.

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Rion des Landes, France

Patrice Dourthe