Patent ID: 11958220
Assignee: LAWRENCE LIVERMORE NATIONAL SECURITY, LLC
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC B  A  C | IPC A  B  C

Claim 14:
15. A system comprising:
a polyurethane shape memory polymer (SMP) foam;
first and second cells, included in the SMP foam, which directly contact each other;
wherein (a)(i) the first and second cells share and directly contact a ring of struts that provides structural support for the first and second cells, (a)(ii) a membrane directly contacts the ring of struts, and (a)(iii) the membrane is partially reticulated but not fully reticulated;
wherein the partially reticulated membrane includes: (b)(i) a void that forms a fluid path between the first and second cells, (b)(ii) an interface, between the partially reticulated membrane and the void, which is rough and uneven;
wherein the SMP foam includes a reaction product of glycerol and hexamethylene diisocyanate (HDI).