Polymer material useful for medical devices
A copolymer is described comprising a first repeating unit from a compound selected from the consisting of a pentadecalactone and a dioxanone in combination with a second repeating unit derived from at least one additional ester repeating unit-yielding monomer, wherein the copolymer does not comprise any further repeating units except for said first and second repeating units, a melting temperature of at least 70° C., and a crystalline content selected from the group consisting of an overall crystalline content of at least 25% and a crystalline content of the first repeating unit of at least 20%.
1. A copolymer, comprising:
a first repeating unit derived from a compound selected from the group consisting of a pentadecalactone and a dioxanone in combination with a second repeating unit derived from at least one additional ester repeating unit yielding monomer, wherein the copolymer does not comprise any further repeating units except for said first and said second repeating units,
a melting temperature of at least 70° C., and
a crystalline content selected from the group consisting of an overall crystalline content of at least 25% and a crystalline content of the first repeating unit of at least 20%.
2. The copolymer of claim 1 , wherein the first repeating unit and the second repeating unit are distributed within the copolymer in distinct blocks.
3. The copolymer of claim 1 , wherein the copolymer has a number average of the molecular weight of at least 50000 g/mol.
4. The copolymer of claim 1 , wherein the copolymer has a melting temperature of at least 80° C.
5. The copolymer of claim 1 , wherein the copolymer has a crystallinity of at least 35%.
6. The copolymer of claim 1 , wherein the copolymer is a polyester urethane, comprising blocks of the first repeating unit and blocks of the second repeating unit connected with a divalent urethane segment.
7. The copolymer of claim 6 , wherein a block derived from pentadecalactone has a number average of the molecular weight of 1000 to 20000 g/mol.
8. The copolymer of claim 1 , wherein the first repeating unit of pentadecalactone comprises 10 wt % to 90 wt %.
9. The copolymer of claim 1 , wherein the at least one additional ester repeating units yielding monomer is selected from the group consisting of caprolactone, para-dioxanone and mixtures thereof.
10. A surgical article, comprising a copolymer of claim 1 .
11. The surgical article of claim 10 , wherein the surgical article is selected from the group consisting of sutures, surgical nets and measures.
12. A filament, prepared from a copolymer of claim 1 , wherein the filament has an average diameter from 500 μm to 40 μm.
13. The filament of claim 12 , wherein the filament has at least one quality selected from the group consisting of an elastic modulus of more than 1000 Mpa and a tensile strength of more than 100 MPa at an elongation of less than 1200%.
14. The surgical article of claim 11 , wherein the sutures, surgical nets and measures are adapted for a use selected from the group consisting of hernia repair, prosthetic tendons and prosthetic ligaments.
15. A method of making a filament comprising the steps of:
a) selecting a copolymer of claim 1 ,
b) melting the copolymer,
c) extruding the molten copolymer through a spinning nozzle to form a filament,
d) cooling of the filament, and
e) winding the filament onto a suitable device.
16. The method of claim 15 , further comprising a step of admixing the copolymer with a conventional additive, between step a) and step b).
17. The method of claim 15 , further comprising a step of admixing the copolymer with a conventional additive, between step b) and step c).