Polyurea composite armor

US8580387B1 · kind B1 · utility

Assignee

• United States of America as represented by the Secretary of the Air Force · US

Inventors

• Jeffry J. Fedderly · Ellicott City, US
• Gilbert F. Lee · Greenbelt, US
• Curtis A. Martin · Damascus, US
• Edward Balizer · Bethesda, US

Key dates

• Filing date: Sep 27, 2011
• Grant date: Nov 12, 2013
• Expiry date: Feb 16, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31551
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A composite armor including a ballistic armor layer and a directly attached polyurea layer. The polyurea layer is the cured reaction product of an isocyanate curing agent and a mixture of diamines having the general formula:H2N-Ph-(C═O)—O—(CH2—CH2—CH2—CH2—O)n—(C═O)-Ph-NH2,wherein in the mixture n in the ranges from 3 to 14 and the weight average value of n is about 9 to 10. Ph represents phenyl. In a preferred embodiment, the polyurea layer is the strike face. The composite armor is useful for light armor applications in which weight is a factor such as military vehicle armor and military boat armor.