Vetrotex France

Saint-Gobain Vetrotex France S.a.

Michel Gonthier

Jean-Marc Bain

Anne Avena

The invention relates to glass strands coated with an essentially aqueous sizing composition which comprises the combination in which:R, R, R, R, Rand R, which are identical or different, represent a C-C, preferably C-C, alkyl radical,Z represents a C-Chydrocarbonaceous chain which can comprise one or more N, O and/or S heteroatoms, The glass strands obtained exhibit an improved ability to be cut which renders them capable of being used to reinforce polymers, in particular by moulding by simultaneous spraying.

Sized glass yarns, sizing composition and composites comprising said yarns

A method of moulding, notably injection or compression moulding, of a composite product from an impregnation paste based upon thermosetting resin or resins and a reinforcement of glass threads, by supplying the moulds with an impregnation paste and reinforcement in the form of coated chopped direct rovings incorporated into the paste, the coating material of which includes an adhesive agent based upon polyurethane or polyurethanes.

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