Self-healing laminate system

• US 9,415,575 B2
• Filed: 01/26/2009
• Issued: 08/16/2016
• Est. Priority Date: 01/25/2008
• Status: Active Grant

• Current Assignee: Board of Trustees of The University of Illinois
• Original Assignee: Board of Trustees of The University of Illinois
• Inventors: Beiermann, Brett A., Keller, Michael W., White, Scott R., Sottos, Nancy R.
• Primary Examiner(s): Choi, Peter Y
• Application Number:
  US12/359,631
• Publication Number:
  US 20090191402A1
• Time in Patent Office: 2,759 Days
• Field of Search: 428/221, 428/323, 442/64, 442/181
• US Class Current: 1/1
• CPC Class Codes: B29C 73/163 Sealing compositions or agents, e.g. combined with propellant agents
• CPC Class Codes: B29C 73/22 the article containing elements including a sealing composition, e.g. powder being liberated when the article is damaged
• CPC Class Codes: B32B 2037/1253 curable adhesive
• CPC Class Codes: B32B 2250/05 5 or more layers
• CPC Class Codes: B32B 2250/24 All layers being polymeric
• CPC Class Codes: B32B 2250/40 Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
• CPC Class Codes: B32B 2262/0261 Polyamide fibres
• CPC Class Codes: B32B 2307/51 Elastic
• CPC Class Codes: B32B 2307/7242 Non-permeable
• CPC Class Codes: B32B 2307/7246 Water vapor barrier
• CPC Class Codes: B32B 2307/7265 Non-permeable
• CPC Class Codes: B32B 2307/762 Self-repairing, self-healing
• CPC Class Codes: B32B 2309/027 Ambient temperature
• CPC Class Codes: B32B 2309/08 Dimensions, e.g. volume
• CPC Class Codes: B32B 2309/105 Thickness
• CPC Class Codes: B32B 2571/00 Protective equipment
• CPC Class Codes: B32B 27/12 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 27/18 characterised by the use of special additives
• CPC Class Codes: B32B 27/283 comprising polysiloxanes
• CPC Class Codes: B32B 27/40 comprising polyurethanes
• CPC Class Codes: B32B 37/12 : characterised by using adhesives
• CPC Class Codes: B32B 5/02 : characterised by structural features of a fibrous or filamentary layer layer formed of metallic wires B32B15/02; layer formed of natural mineral fibres B32B19/02; layer formed of wood fibres B32B21/02
• CPC Class Codes: B32B 5/022 : Non-woven fabric
• CPC Class Codes: B32B 5/024 : Woven fabric
• CPC Class Codes: B32B 7/12 : using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: Y10T 156/10 : Methods of surface bonding and/or assembly therefor
• CPC Class Codes: Y10T 428/249921 : Web or sheet containing structurally defined element or component
• CPC Class Codes: Y10T 428/25 : Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles

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.

Claims

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.