| US 7,538,163 B2 | ||
| Modification of thermoplastic polymers | ||
| Deon Bezuidenhout, Cape Town (South Africa); Jacobus P. Theron, Stellenbosch (South Africa); Lawrence J. Higham, Durbanville (South Africa); and Peter P. Zilla, Cape Town (South Africa) | ||
| Assigned to Medtronic, Inc., Minneapolis, Minn. (US) | ||
| Filed on Mar. 24, 2006, as Appl. No. 11/388,317. | ||
| Claims priority of provisional application 60/664767, filed on Mar. 24, 2005. | ||
| Prior Publication US 2006/0223955 A1, Oct. 05, 2006 | ||
| Int. Cl. C08F 283/04 (2006.01) | ||
| U.S. Cl. 525—455 | 36 Claims |
| 1. A method of preparing a polymer, the method comprising:
providing a thermoplastic polymer comprising urethane groups having backbone carbamate nitrogen atoms, and optionally urea
groups having backbone urea nitrogen atoms; and
reacting at least one backbone carbamate nitrogen atom and/or optional backbone urea nitrogen atom of the thermoplastic polymer
with a modification agent to form a modified polymer; wherein the modification agent has a formula X—R—(Y)a,
wherein X is —COR1, and
wherein R1 is chlorine;
R is a bond or an organic group;
each Y is independently a crosslinkable group; and
a is 1 to 3;
with the proviso that Y does not include a silane or substituted silane group.
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