METHOD FOR PRODUCING A COMPOSITE MATERIAL

• Main Authors: SAINT-LOUP, René, AMEDRO, Hélène, CORPART, Jean-Marc, JACQUEL, Nicolas
• Format: Patent
• Language: English; French; German
• Published: 07.02.2024
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

A process for producing a composite material, said process comprising the following steps of a) providing a polymer, b) providing natural fibers, c) preparing a composite material from said fibers and said thermoplastic polymer, said process being characterized in that the polymer is a thermoplastic polyester comprising at least one 1,4: 3,6-dianhydrohexitol unit (A), at least one alicyclic diol unit (B) other than the 1,4: 3,6-dianhydrohexitol units (A), at least one terephthalic acid unit (C), wherein the (A)/[(A)+(B)] ratio is at least 0.05 and at most 0.75, said polyester not containing any aliphatic non-cyclic diol units or comprising a molar amount of aliphatic non-cyclic diol units, relative to all the monomer units of the polyester, of less than 5%, and the reduced viscosity in solution (25° C.; phenol (50% m): ortho-dichlorobenzene (50% m); 5 g/l of polyester) of which is greater than 50 ml/g.