Thermoplastic composition having high fluidity

• Main Authors: Orange, Gilles, Tupinier, Didier
• Format: Patent
• Language: English
• Published: 12.03.2020
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

The invention concerns a thermoplastic composition having high fluidity in the molten state, comprising at least: (a) one thermoplastic polymer matrix; (b) one oligomer chosen from the cyclic ester oligomers, the ether oligomers and mixtures thereof, said oligomer having a degree of polymerisation of between 2 and 25; and (c) a 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 method for producing a composite item from such a composition by impregnating a reinforcement such as a fabric or a preform, the composite item obtained according to said method, and the use of an oligomer (b) in association with at least one phenolic polymer (c), as a plasticiser in a thermoplastic polymer matrix.