Self-healing laminate system

Patent metadata

Field	Value
Publication number	US-9415575-B2
Application number	US-35963109-A
Country	US
Kind code	B2
Filing date	Jan 26, 2009
Priority date	Jan 25, 2008
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

Abstract

A laminate material may include a first flexible layer, and a self-healing composite layer in contact with the first flexible layer. The composite layer includes an elastomer matrix, a plurality of first capsules including a polymerizer, and a corresponding activator for the polymerizer. The laminate material may self-heal when subjected to a puncture or a tear.

First claim

What is claimed is:

1. A flexible laminate material comprising:
a first flexible multilayered composite comprising a first barrier layer and a first fabric layer,
a second flexible multilayered composite comprising a second barrier layer and a second fabric layer, and
a self-healing composite layer between the first and second flexible multilayered composites, the self-healing composite layer having a thickness greater than 0.5 ram,
where the self-healing composite layer is able to withstand a strain of more than 10% without delamination and comprises:
an elastomer matrix,
a plurality of first capsules comprising a polymerizer for an elastomer and having an average diameter less than 500 micrometers, and
a plurality of second capsules comprising a corresponding activator for the polymerizer, and
where the first and second barrier layers may be the same or different, and the first and second fabric layers may be the same or different,
where the first and second fabric layers are positioned on the top and bottom sides of the laminate material,
and wherein the flexible laminate material further comprises an adhesion promoter between the first barrier layer and the self-healing composite layer and/or an adhesion promoter between the second barrier layer and the self-healing composite layer.

2. The laminate material of claim 1 , where the elastomer matrix comprises at least one member selected from the group consisting of elastomer polymers, copolymer elastomers, block copolymer elastomers and polymer blend elastomers.

3. The laminate material of claim 1 , where the elastomer matrix comprises a polysiloxane.

4. The laminate material of claim 1 , where the polymerizer comprises a polymerizer for a polysiloxane.

5. The laminate material of claim 1 , where the plurality of first capsules has an aspect ratio of 1:1 to 1:2.

6. The laminate material of claim 1 , where the corresponding activator is a catalyst.

7. The laminate material of claim 1 , where the corresponding activator and the elastomer matrix are a homogeneous mixture.

8. The laminate material of claim 1 , where the corresponding activator is present as a phase separated solid in the elastomer matrix.

9. The laminate material of claim 1 , where the plurality of second capsules has an aspect ratio of 1:1 to 1:2.

10. The laminate material of claim 1 , where the first and second barrier layers, independently of one another, are selected from the group consisting of: high density polyethylene; low density polyethylene; polypropylene; polystyrene; poly(vinyl chloride); poly(vinylidene chloride); copolymers of poly(vinylidene chloride) with monomer units derived from vinyl chloride; acrylate and acrylonitrile monomers; poly(chlorotrifluoroethylene); poly(ethylene-co-vinyl alcohol); poly(hydroxy amino ethers); nitrile polymers; polyesters; polyamides; polyurethanes, siloxanes; rubbers; crystalline polymers; and blends and copolymers thereof.

11. The laminate material of claim 1 , where the first and second fabric layers are the same or different polyamides.

Assignees

• Beiermann Brett A
• Keller Michael W
• White Scott R
• Sottos Nancy R
• Univ Illinois

Inventors

• Beiermann Brett A
• Keller Michael W
• White Scott R
• Sottos Nancy R

Classifications

• B32B2309/105

  Thickness · CPC title

• B32B2307/7242

  Non-permeable · CPC title

• B29C73/163

  Sealing compositions or agents, e.g. combined with propellant agents · CPC title

• B32B37/12 Primary

  characterised by using adhesives · CPC title

• B32B2250/24

  All layers being polymeric · CPC title