# US 7,608,322 B2 · Impact resistive composite materials and methods for making same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,608,322 B2 - Document ID: US7608322B2 - Status: Granted - Kind: B2 - Application number: 11/950,709 - Filed: 2007-12-05 - Published: 2009-06-11 - Granted: 2009-10-27 - Earliest claimed: 2007-12-05 - Assignees: Air Products and Chemicals, Inc. - Inventors: Courtney T. Thurau; Mark David Conner - Web page: https://patentgrep.com/patent/US7608322B2 ## CPC - F41H 5/0428: {Ceramic layers in combination with additional layers made of fibres, fabrics or plastics} - F41H 5/04: composed of more than one layer {(outerwear resistant to mechanical aggressions A41D31/24; layered products B32B; shaping reinforced articles B29C67/00)} - F41H 5/0457: {Metal layers in combination with additional layers made of fibres, fabrics or plastics} - Y10S 428/911: Penetration resistant layer - Y10T 428/249939: Two or more layers - Y10T 442/2615: Coating or impregnation is resistant to penetration by solid implements - Y10T 442/2623: Ballistic resistant - F41H: ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A composite material that is suitable for the protection of personnel and/or property from impact due to ballistic projectiles and method for making same are disclosed herein. In one embodiment, there is provided composite for resisting impact from an oncoming projectile having a front strike face and a back wear face comprising: an elastomer; and an impact resistive substrate wherein at least a portion of the impact resistive substrate is coated by the elastomer to provide the composite having a front strike face coating and a back wear face coating and wherein a ratio of weight of front strike face coating to back wear face coating ranges from 1:1.2 to 1:100. ## Claims ### Claim 1 A composite for resisting impact from an oncoming projectile having a front strike face and a back wear face comprising: an elastomer; and an impact resistive substrate wherein at least a portion of the impact resistive substrate is coated by the elastomer to provide the composite having a front strike face coating and a back wear face coating and wherein a weight ratio of front strike face coating to back wear face coating ranges from 1:1.2 to 1:100. ### Claim 2 (depends on 1) The composite of claim 1 further comprising an adhesion promotion layer disposed between at least one surface of the elastomer and at least one surface of the impact resistive substrate. ### Claim 3 (depends on 1) The composite of claim 1 wherein the elastomer comprises at least one selected from the group consisting of a polyurethane, a polyurea, and combinations thereof. ### Claim 4 (depends on 3) The composite of claim 3 wherein the elastomer comprises polyurea. ### Claim 5 (depends on 4) The composite of claim 4 wherein the impact resistive substrate comprises at least one selected from the group consisting of a ceramic, a metal, an aramid ballistic fabric, a polymer, and combinations thereof. ### Claim 6 (depends on 5) The composite of claim 5 wherein the impact resistive substrate comprises the ceramic. ### Claim 7 (depends on 6) The composite of claim 6 wherein the ceramic is at least one selected from the group consisting of aluminum oxide, boron carbide, boron nitride, silicon carbide, silicon nitride, zirconium oxide, and combinations thereof. ### Claim 8 (depends on 7) The composite of claim 7 wherein the ceramic comprises aluminum oxide. ### Claim 9 (depends on 1) The composite of claim 1 wherein the weight ratio ranges from 1:1.2 to 1:20. ### Claim 10 A composite for resisting impact from an oncoming projectile having a front strike face and a back wear face comprising: an elastomer selected from the group consisting of at least one selected from the group consisting of a polyurethane, a polyurea, and combinations thereof; an impact resistive substrate selected from the group consisting of a ceramic, a metal, an aramid ballistic fabric, a polymer, and combinations thereof, wherein at least a portion of the impact resistive substrate is coated by the elastomer to provide the composite having a front strike face coating and a back wear face coating and wherein a weight ratio of front strike face coating to back wear face coating ranges from 1:1.2 to 1:100; and optionally an adhesion promotion layer disposed between at least one surface of the elastomer and at least one surface of the impact resistive substrate. ### Claim 11 (depends on 10) The composite of claim 10 wherein the weight ratio ranges from 1:1.2 to 1:20. ### Claim 12 A composite for resisting impact from an oncoming projectile having a front strike face and a back wear face comprising: an elastomer comprising a polyurea; and an impact resistive substrate comprising a ceramic wherein at least a portion of the impact resistive substrate is coated by the elastomer to provide the composite having a front strike face coating and a back wear face coating and wherein a weight ratio of front strike face coating to back wear face coating ranges from 1:1.2 to 1:100 and wherein the ceramic comprises aluminum oxide. ### Claim 13 A composite for resisting impact from an oncoming projectile having a front strike face and a back wear face comprising: an elastomer comprising a polyurea; an impact resistive substrate comprising a ceramic wherein the ceramic comprises aluminum oxide, wherein at least a portion of the impact resistive substrate is coated by the elastomer to provide the composite having a front strike face coating and a back wear face coating and wherein a weight ratio of front strike face coating to back wear face coating ranges from 1:1.2 to 1:100; and optionally an adhesion promotion layer disposed between at least one surface of the elastomer and at least one surface of the impact resistive substrate.