Polyurethane foam based ballistic armor

1. A multi-layered ballistic armor comprising:

a layer of a polyurethane foam material, wherein the polyurethane foam material comprises a polyurethane formed from an isocyanate and a polyol, a polymerization reaction initiator that is an isoprenoid compound, and a polymerization reaction accelerator, wherein the polyurethane foam material further comprises a polyorganosiloxane and a polymerization catalyst, and wherein the polyurethane and the polyorganosiloxane are cross-linked to one another in a common layer using a cross-linker; and

a ballistic impact absorption layer.

2. The multi-layered ballistic armor of claim 1 , wherein the ballistic impact absorption layer is a composite multi-layer assembly comprising two or more layers wherein each layer independently comprises a member selected from the group consisting of para-amid synthetic fiber, ballistic ceramic, metal, ultrahigh molecular weight polyethylene fiber woven fabrics, synthetic woven fiber, graphene, and combinations thereof.

3. The multi-layered ballistic armor of claim 2 , wherein the composite multi-layer assembly comprises a ballistic ceramic layer and a metal layer.

4. The multi-layered ballistic armor of claim 3 , wherein the layer of the polyurethane foam material is adjacent to the ballistic ceramic layer on a strike side of the armor, and the metal layer is a titanium layer sandwiched between two ultrahigh molecular weight polyethylene (UHMWPE) fiber woven fabric layers.

5. The multi-layered ballistic armor of claim 3 , wherein the ballistic ceramic layer comprises a member selected from the group consisting of alumina, silicon carbide, boron carbide, titanium diboride, aluminum oxide, and combinations thereof.

6. The multi-layered ballistic armor of claim 3 , wherein the metal layer is segmented having a gap of less than 2 mm between layer segments to increase flexibility of the armor.

7. The multi-layered ballistic armor of claim 1 , further comprising a second layer of the polyurethane foam material oriented such that the ballistic impact absorption layer is between the layer of the polyurethane foam material and the second layer of the polyurethane foam material.

8. The multi-layered ballistic armor of claim 1 , wherein the ballistic impact absorption layer is a woven para-amid synthetic fiber fabric.

9. The multi-layered ballistic armor of claim 1 , wherein the polyurethane is present in a first portion, and the polyorganosiloxane is present in a second portion adjacent to the first portion and the polyurethane and the polyorganosiloxane are cross-linked together to form a composite material.

10. The multi-layered ballistic armor of claim 9 , wherein the first portion has a density of about 4 lbs/ft 3 and the second portion has a density of about 15 lbs/ft 3 .

11. The multi-layered ballistic armor of claim 1 , wherein the polyurethane foam material comprises from about 66 wt. % to about 87 wt. % of the polyurethane and from about 8 wt. % to about 25 wt. % of the polyorganosiloxane.

12. The multi-layered ballistic armor of claim 1 , wherein the polymerization reaction initiator is abietic acid.

13. The multi-layered ballistic armor of claim 1 , wherein the polymerization reaction accelerator comprises a member selected from the group consisting of charcoal, activated carbon, diamonds, fullerenes, graphites, coke, coal, and combinations thereof.

14. The multi-layered ballistic armor of claim 1 , wherein the polyurethane foam material further comprises at least one of: a gelling agent, an emulsification control agent, a reinforcement filler, and a reinforcement polymer.

15. The multi-layered ballistic armor of claim 14 , wherein the emulsification control agent is fumed silica and the reinforcement filler cross-links with the polyurethane foam.

16. The multi-layered ballistic armor of claim 1 , wherein the polyurethane foam further comprises a polysulfide.

17. The multi-layered ballistic armor of claim 1 , wherein the polyurethane foam is a hard foam and has a compressive modulus of about 275 psi to about 425 psi.

18. The multi-layered ballistic armor of claim 1 , wherein the polyurethane foam is a soft foam and has a compressive modulus of about 10 psi to about 50 psi.

19. A bullet proof vest having a receiving pocket in which the multi-layered ballistic armor of claim 1 is oriented.

20. The multi-layered ballistic armor of claim 1 , wherein the multi-layered layered ballistic armor has an armor level rating of IIIA, III, or IV per NIJ-Standard-0101.6, published July 2008, as established by the National Institutes of Justice Ballistic-Resistance Body Standards and Testing Program.

21. A method of coating a material with a polyurethane foam to form a multi-layered ballistic armor, comprising:

applying the polyurethane foam as an exterior coating to the material to form a coated material,

wherein the material comprises a ballistic impact absorption material,

wherein the polyurethane foam is formed from a polyurethane formed of an isocyanate and a polyol; a polymerization reaction initiator comprising an isoprenoid compound; and a polymerization reaction accelerator, wherein the polyurethane foam further comprises a polyorganosiloxane and a polymerization catalyst, and wherein the polyurethane and the polyorganosiloxane are cross-linked to one another in a common layer using a cross-linker.

22. A multi-layered ballistic armor comprising:

a layer of a polyurethane foam material, wherein the polyurethane foam material comprises a polyurethane formed from an isocyanate and a polyol, a polymerization reaction initiator that is an isoprenoid compound, and a polymerization reaction accelerator; and

a ballistic impact absorption layer,

wherein the polyurethane foam is either a) a hard foam and has a compressive modulus of about 275 psi to about 425 psi, or b) a soft foam and has a compressive modulus of about 10 psi to about 50 psi.