Self-healing polymer materials for wire insulation, polyimides, flat surfaces, and inflatable structures

• US 10,174,198 B2
• Filed: 06/14/2012
• Issued: 01/08/2019
• Est. Priority Date: 06/16/2011
• Status: Active Grant

• Current Assignee: United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration
• Original Assignee: United States of America as represented by the Administrator of NASA
• Inventors: Jolley, Scott T., Williams, Martha K., Gibson, Tracy L., Smith, Trent M., Caraccio, Anne J., Li, Wenyan
• Primary Examiner(s): Shosho, Callie E
• Assistant Examiner(s): Shukla, Krupa
• Application Number:
  US13/523,806
• Publication Number:
  US 20120321828A1
• Time in Patent Office: 2,399 Days
• Field of Search: 428212, 428220, 428 366, 524104, 525418, 528 38, 528 68
• CPC Class Codes: B32B 2379/08 Polyimides
• CPC Class Codes: B32B 2457/04 Insulators
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/34 comprising polyamides
• CPC Class Codes: B32B 7/022 Mechanical properties
• CPC Class Codes: B32B 7/04 Interconnection of layers
• CPC Class Codes: C08G 18/5024 containing primary and/or secondary amino groups
• CPC Class Codes: C08G 18/61 Polysiloxanes
• CPC Class Codes: C08G 18/755 and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
• CPC Class Codes: C08G 18/7621 being toluene diisocyanate including isomer mixtures
• CPC Class Codes: C08K 9/10 Encapsulated ingredients
• CPC Class Codes: C08L 75/02 Polyureas
• CPC Class Codes: C08L 79/08 Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
• CPC Class Codes: H01B 3/306 Polyimides or polyesterimides
• CPC Class Codes: Y10T 428/1379 Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit
• CPC Class Codes: Y10T 428/24942 including components having same physical characteristic in differing degree

Abstract

Materials based on low melt polyimide, polyurea, or polyurethane chemistry have been developed which exhibit self-healing properties. These high performance polymers can be utilized either by themselves or in combination with microcapsule technology to deliver self-healing properties to electrical wire insulation or in other high performance, thin wall technologies such as inflatable structures.

Claims

1. A polymer material comprising:

a polymer matrix that flows at approximately 23°

C., or about room temperature, wherein the polymer of the polymer matrix is formed by polymerization of monomers comprising;

(a) a diamine monomer comprising repeating alkyleneoxy segments of 2 to 6 carbon atoms or repeating siloxy segments and having a molecular weight of between 250 and 3,000; and

(b) a dianhydride monomer;

wherein the polymer material is a film or layer 50 microns to 5 mm thick and when the film or layer is cut into two pieces, and the two pieces placed laterally in contact with or near to each other, the pieces of the film or layer flow back together at approximately 23°

C., or about room temperature within 30 days and molecularly combine.

2. The polymer material of claim 1, wherein the dianhydride monomer is an aromatic dianhydride.

3. The polymer material of claim 1, wherein the dianhydride monomer is bisphenol A dianhydride (BPADA), biphenyl dianhydride (BPDA), or benzophenone-3,3′

,4,4′

-tetracarboxylic dianhydride.

4. The polymer material of claim 3, wherein the monomers further comprise an aromatic diamine monomer selected from the group consisting of ODA, TDA, and DASO.

5. The polymer material of claim 3, wherein the dianhydride monomer is BPADA.

6. The polymer material of claim 5, wherein the monomers further comprise an end capping group that is a monoamine or a monoanhydride.

7. The polymer material of claim 1, wherein the monomers further comprise an aromatic diamine monomer.

8. The polymer material of claim 7, wherein the aromatic diamine monomer is oxydianiline (ODA), thiodianiline (TDA), or dianilinesulfone (DASO).

9. The polymer material of claim 1, wherein the monomers further comprise an end capping group.

10. The polymer material of claim 9, wherein the end capping group is not cross-linkable.

11. The polymer material of claim 9, wherein the end capping group is a monoamine or monoanhydride.

12. The polymer material of claim 11, wherein the end capping group is maleic anhydride (MAA), succinic anhydride (Succan), or C8-succinic anhydride (C8Succan).

13. The polymer material of claim 12, wherein the end capping group is MAA.

14. The polymer material of claim 1, wherein the monomers further comprise ODA, TDA, DASO, or diaminododecane (DAD).

15. The polymer material of claim 1, wherein the monomers further comprise a diamine selected from the group consisting of ODA, TDA, DASO, and diaminododecane (DAD);

and the monomers further comprise a monoamine or monoanhydride.