Patent EA-001451-B1 (EA)
Title: Fibres of strongly branched polyamide
Inventor: ARNAUTS JAN EUGEEN FREDERIC
IPC: C08G69/08
Filed: 1997-06-06
Abstract: 1. Polyamide fibre, obtained by high-speed forming, characterized in that the polyamide of which the fibre is made is a star branched polyamide, which comprises a core molecule and branches series and has a molecular weight distribution Mz/Mw of less than 1.5. 2. Polyamide fibre according to claim 1, characterized in that the number of arms of the polyamide is 3-20. 3. Polyamide fibre according to claim 2, characterized in that the number of arms is 3-10. 4. Polyamide fibre according to claim 1 or 3, characterized in that the polyamide arms are joined to a core molecule whose size is smaller than the average length of the polyamide arms. 5. Polyamide fibre according to claim 1, characterized in that the core molecule compound is stable at the melting point of the polyamide. 6. Polyamide fibre according to claim 1, 4 or 5, characterized in that the polyamide arms originate from a core molecule containing at least 3 functional groups in which the functional groups are identical. 7. Polyamide fibre according to claim 6, characterized in that the functional groups are carboxylic groups. 8. Polyamide fibre according to claim 1, characterized in that the polyamide is chosen from the group of polyamides which are produced by polycondensation of α, ω -aminocarboxylic acids or by ring-opening polymerization of lactams. 9. Polyamide fibre, obtained by high-speed forming, characterized in that the polyamide of which the fibre comprises a linear polyamide in addition to a star-branched polyamide and the average chain length of the linear polyamide is at most equal to the average chain length of the polyamide arms in the star-branched polyamide. 10. Polyamide fibre according to claim 9, characterized in that the linear polyamide content is lower than the star-branched polyamide content. 11. Polyamide fibre according to claim 1, characterized in that the number-average molecular weight of the arms is at least 4000. 12. Polyamide fibre according to claim 8, characterized in that the polyamide is poly-ε-caprolactam. 13. Polyamide fibre according to claim 1, characterized in that the core molecule has at least 3 carboxyl groups. 14. Polyamide fibre according to claim 13, characterized in that the carboxylic groups are not spatially hindered. 15. Polyamide fibre according to claim 7, characterized in that the core molecule compound also contains alkaline sites which are not reactive. 16. Polyamide fibre according to claim 15, characterized in that the core molecule compound contains at least one heteroatom. 17. Polyamide fibre according to claim 16, characterized in that the core molecule compound contains at least one secondary-bound or tertiary-bound nitrogen atom. 18. Polyamide fibre according to claim 17, characterized in that the core molecule is chosen from the group comprising secondary or tertiary alkylamines and heterocyclic compounds containing at least one nitrogen atom in the ring. 19. Polyamide fibre according to claim 18, characterized in that the core molecule is a 1,3,5-triazine. 20. Polyamide fibre according to claim 19, characterized in that the core molecule is 2,4,6-trisaminocaproic acid 1,3,5-triazine. 21. Polyamide fibre according to any of claims 1-20, characterized in that the speed of formation in the method of high-speed formingis equal or exceeds 5000 m/min.