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The Arkema patent solves the following problem:
Our analysis of this patent is as follows:
Arkema’s patent US 7151136 B2 deals with Polyamide thermoplastic compositions with improved impact strength properties.
The invention relates to a polyamide-based thermoplastic composition comprising, in weight: 50 to 98 parts of a polyamide (A1) nondiamine; 0.2 to 40 parts, preferably 0.2 to 9 parts, a polyamide (A2) diamine, said polyamide (A2) different from the polyamide (A1) and the mass ratio (A2 ) / (A1) of less than 1; 1 to 60 parts, preferably 1 to 30 parts, of a reactive impact modifier (B) or a combination of modifiers comprising at least one reactive impact modifier (B ) or a combination (B) comprising at least one impact modifier and at least one reactive modifier. It also relates to an impact modifier composition and process for preparing a thermoplastic composition according to the invention in use as an impact modifier composition.
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