Hutchinson

Matthieu Vatan

Philippe Sonntag

Nicolas Garois

Jacques Drouvroy

Grégory Martin

A process for preparing a reinforced and reactive thermoplastic composition having a continuous phase based on a thermoplastic polymer and dispersed therein is a discontinuous phase based on a reactive reinforcing agent that may be immiscible with the thermoplastic polymer is provided. A composition obtained by this process is also provided. The reinforcing agent is selected from the group consisting of epoxy resins, polyorganosiloxanes having SiH functional group(s), diisocyanates or polyisocyanates and mixtures thereof, comprises a grafting, a branching and/or a crosslinking, that are carried out in situ, by reactive compounding of these phases with a shear rate greater than 10s, of the reinforcing agent onto the chain of the thermoplastic polymer, so that the discontinuous phase is dispersed homogeneously in the continuous phase in the form of nodules having a number-average size of less than 5 &#x3bc;m.

Process for preparing a reinforced and reactive thermoplastic composition, and this composition

The invention relates to a process for preparing a reinforced and reactive thermoplastic composition having a continuous phase which is based on at least one thermoplastic polymer and dispersed in which is a discontinuous phase based on at least one reactive reinforcing agent that may be immiscible with said at least one thermoplastic polymer, and also to a composition obtained by this process. A process according to the invention for preparing this thermoplastic composition in which said at least one reinforcing agent is selected from the group consisting of epoxy resins, polyorganosiloxanes having SiH functional group(s), diisocyanates or polyisocyanates and mixtures thereof, comprises a grafting, a branching and/or a crosslinking, that are carried out in situ, by reactive compounding of these phases with a shear rate greater than 10s, of said at least one reinforcing agent onto the chain of said at least one thermoplastic polymer, so that said discontinuous phase is dispersed homogeneously in said continuous phase in the form of nodules having a number-average size of less than 5 &#x3bc;m.

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Puiseaux, France

Matthieu Vatan