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

Patent metadata

Field	Value
Publication number	US-10174198-B2
Application number	US-201213523806-A
Country	US
Kind code	B2
Filing date	Jun 14, 2012
Priority date	Jun 16, 2011
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

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.

First claim

We claim:

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.

Assignees

• Jolley Scott T
• Williams Martha K
• Gibson Tracy L
• Smith Trent M
• Caraccio Anne J
• Li Wenyan
• Nasa

Inventors

• Jolley Scott T
• Williams Martha K
• Gibson Tracy L
• Smith Trent M
• Caraccio Anne J
• Li Wenyan

Classifications

• Y10T428/1379

  Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit · CPC title

• H01B3/306

  Polyimides or polyesterimides · CPC title

• C08L79/08 Primary

  Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors · CPC title

• C08L75/02

  Polyureas · CPC title

• C08K9/10

  Encapsulated ingredients · CPC title