Patent EA-000848-B1 (EA)
Title: Thermoplastic composition
Inventor: GUAITA CESARE
IPC: C08L77/00
Filed: 1996-09-27
Abstract: 1. A thermoplastic composition comprising a thermoplastic polymer matrix and at least one compound that enhances the resilience of thermoplastic compositions selected from a group including ionomers, polymers or copolymers of polyolefins comprising carboxylic, ester, anhydride, glycidic or carboxylate functional groups, characterized in that said matrix consists of a mixture of: at least one first thermoplastic copolymer produced by copolymerising ε-caprolactam with at least one monomer selected from the group which includes: an amino acid having at least nine carbon atoms, or the corresponding lactam, a mixture of hexamethylenediamine and a diacid having at least nine carbon atoms, the weight ratio of the ε-caprolactam to the total amount of hexamethylenediamine and diacid being 4-9; and, at least, one second thermoplastic polymer or copolymer produced by polymerising monomers having at least nine carbon atoms, wherein the amount of second polymer or copolymer in the matrix is 40-80 wt.%, and the amount of resilience modifying compound is 20-50 wt.%, based on the weight of the thermoplastic composition. 2. A composition according to claim 1, characterized in that the second thermoplastic polymer is selected from a group which includes polymers based on polycaproamide, polyhexamethyleneadipamide or their copolyamides. 3. A composition according to claim 1 or 2, characterized in that the amount of resilience modifying compound is 25-45 wt.%, based on the weight of the composition. 4. A composition according to one of the preceding claims, characterized in that comprises a plasticizer of polyamides. 5. A composition according to claim 4, characterized in that the amount of plasticizer comprises less than 15 wt.%, based on the weight of the composition. 6. A composition according to one of the preceding claims, characterized in that monomer of diacid of the first polymer comprises 36 carbon atoms. 7. A composition according to claim 6, characterized in that copolymer comprises functional groups produced by copolymerising of maleic anhydride, metacrylic or acrylic acids. 8. A composition according to claim 6 or 7, characterized in that concentration of a polymer, comprising functional groups, is at least 30 wt%, based on the weight of the composition. 9. A composition according to claim 6, characterized in that comprises a compound modifying resilience and not comprising functional groups has a concentration less than 30.wt%, based on the weight of the composition. 10. A composition according to one of claims 6-9, characterized in that a compound modifying resilience and not comprising functional groups is selected from a group comprising polymers and copolymers of olefins, such as polyethylene, polypropylene, copolymeres of ethylene and propylene, copolymeres of ethylene, propylene and diene monomers (EPDM), elastomeric copolymer of ethylene and propylene (EPR), bloc copolymers or hydrated copolymers of butadiene or styrene, copolymers of olefins and vynyl acetate. 11. An article produced by forming a composition according to one of the preceding claims 1-10. 12. A fuel line for liquids such as fuel oil, diesel oil petrol produced by shaping said composition according to one of the preceding claims 1-10.