Robert H Brady

US Patent:

52604144, Nov 9, 1993

Filed:

Jun 25, 1992

Appl. No.:

7/904096

Inventors:

Allison M. Sikes - Martinsville VA
Robert F. Brady - Gaithersburg MD

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

C08G 6308

US Classification:

528354

Abstract:

This invention is directed to a thermoplastic polymer that is solid at room temperature and which expands on further polymerization, to form a crosslinked polymer, and to a process for preparing the polymer and the crosslinked polymer. In a preferred embodiment the polymer is prepared by polymerizing 10-90 but preferably 20-80 mole percent of a lower alkyl acrylic monomer containing a spirobislactone moiety, 10-90 but preferably 20-80 mole percent of a lower alkyl acrylic monomer containing an epoxide moiety, and 0. 1-5 but preferably 0. 5-1 mole percent of a lower alkyl acrylic monomer containing a functional moiety chosen from primary amino, secondary amino, mercaptan, and hydroxyl groups which can initiate crosslinking with the spirobislactone moiety. The crosslinked polymer is devoid of a spirobislactone carbonyl absorption band and is insoluble in conventional organic solvents.