公开(公告)号：US20170342268A1

公开(公告)日：2017-11-30

申请号：US15535536

申请日：2015-12-21

Applicant: RHODIA OPERATIONS

Inventor： Gilles ORANGE ,  Christiane PREBET ,  Didier TUPINIER ,  Stéphane JEOL

IPC: C08L77/06 ,  C08J5/04

Abstract: The invention relates to a thermoplastic composition having improved fluidity in the molten state, comprising at least: (a) a polyamide that has a melt viscosity greater than or equal to 50 Pa·s, and (b) a non-evolutive polyamide having a melt viscosity lower than the melt viscosity of said polyamide (a), above 0.8 Pa·s, and having a number-average molecular weight Mn lower than that of said polyamide (a), said composition having a melt viscosity that is stabilized at a value below the melt viscosity of said polyamide (a), said polyamide (b) having: a concentration of amine end groups (AEG) and/or of carboxyl end groups (CEG) less than or equal to 20 meq/kg, or a concentration of amine end groups (AEG) greater than or equal to 25 meq/kg; a concentration of acid end groups (CEG) greater than or equal to 25 meq/kg; and a concentration of blocked end groups (BEG) greater than or equal to 25 meq/kg.

公开(公告)号：US20180257318A1

公开(公告)日：2018-09-13

申请号：US15536953

申请日：2015-12-21

Applicant: RHODIA OPERATIONS ,  CENTRE TECHNIQUE DES INDUSTRIES MECANIQUES (CETIM)

Inventor： Gilles ORANGE ,  Didier TUPINIER ,  Philippe PAPIN ,  Mickaeel AUBRY ,  Jean-Michel LEBRUN ,  Sébastien COMAS-CARDONA

IPC: B29C70/52 ,  B29C70/06

CPC classification number: B29C70/523 ,  B29C70/06 ,  B29C70/527 ,  B29C70/528 ,  B29K2077/00 ,  B29K2105/0809 ,  B29K2913/02

Abstract: The invention relates to a method for continuous production of a composite material profile by injection-pultrusion from at least one reinforcing fabric and at least one thermoplastic polymer having high fluidity, said method being characterized in that: i) said fabric is continuously pulled with a pulling speed of at least 0.4 m·min−1 in the course of said process; ii) the impregnation stage is performed by injection of a polymeric composition having high fluidity through the fabric; iii) the profile is then shaped with a specific thermal profile. The invention also relates to a profile obtained according to the method of the invention and a composite article comprising such a profile the curvature whereof may be modified in its curvature by bending and/or its profile by rotational molding.

公开(公告)号：US20170342267A1

公开(公告)日：2017-11-30

申请号：US15534829

申请日：2015-12-21

Applicant: RHODIA OPERATIONS

Inventor： Gilles ORANGE ,  Didier TUPINIER

IPC: C08L77/06 ,  B29C70/48 ,  C08J5/24 ,  B29C70/52 ,  B29K105/06 ,  B29K77/00

Abstract: The invention concerns a thermoplastic composition having high fluidity in the molten state, comprising at least: (a) one thermoplastic polymer matrix; (b) one oligomer selected from cyclic ester oligomers, ether oligomers and mixtures thereof, said oligomer having a degree of polymerization of between 2 and 25; and (c) one phenolic polymer; said compounds (b) and (c) being present in a weight ratio (c)/(b) varying from 0.25 to 6, and preferably from approximately 0.75 to 2.75. The invention also concerns a process for producing a composite article from such a composition by impregnating a reinforcement such as a fabric or a preform, the composite article obtained according to this process, and the use of an oligomer (b) in combination with at least one phenolic polymer (c), as a plasticizing additive in a thermoplastic polymer matrix.