Feb 3, 2026

US12540799 - Lightweight ballistic glasses

Lightweight ballistic glasses are provided that provide effective protection from ballistic attack while also being lightweight enough for use in armored vehicles and aircraft. In addition to other embodiments, a multilayered lightweight ballistic glass is provided that meets the CEN 1063 Level BR7 standard while having a weight of no greater than about 155 kilograms per square meter (kg/m 2 ), and a total thickness of less than about 75 mm.

Assignee: SABIC Global Technologies B.V.
Inventors: Abdulrhman Mohammad Alfawzan, Waleed Fahad Allafi, Mohannad Abulghaith Alhaidari
Filing date: 2023-09-20

ballisticglassesdefense

The patent describes lightweight ballistic glasses designed to provide effective protection against ballistic threats while maintaining a low weight suitable for use in armored vehicles and aircraft. The innovative multilayer construction includes borosilicate glass and polycarbonate layers, achieving compliance with the CEN 1063 Level BR7 standard while remaining under specified weight and thickness limits.

Claim 1

1 . A lightweight ballistic glass comprising: an exterior side comprising an exterior surface of the ballistic glass and an interior side comprising an interior surface of the ballistic glass; a plurality of borosilicate glass layers, one of the plurality of borosilicate glass layers forming the exterior surface of the ballistic glass; a plurality of exterior aliphatic polyurethane film layers, each of the plurality of borosilicate glass layers separated from an adjacent borosilicate glass layer by at least one of the plurality of exterior aliphatic polyurethane film layers, each of the plurality of exterior aliphatic polyurethane layers in contact with a surface of at least one of the plurality of borosilicate glass layers; an interior polycarbonate sheet having a first surface and a second surface, the second surface of the interior polycarbonate sheet forming the interior surface of the ballistic glass; an interior aliphatic polyurethane film layer in contact with the first surface of the interior polycarbonate sheet, the interior aliphatic polyurethane film layer positioned to separate the first surface of the polycarbonate sheet from a surface of a borosilicate glass layer; and a first exterior polycarbonate sheet, and a second exterior polycarbonate sheet, each exterior polycarbonate sheet having a thickness from about 0.5 mm to about 1.5 mm, the first exterior polycarbonate sheet separated from the second exterior polycarbonate sheet by at least two borosilicate glass layers, each of the at least two borosilicate glass layers having a thickness from about 7.5 mm to about 10.5 mm; wherein each of the exterior polycarbonate sheets are separated from the interior polycarbonate sheet by at least three borosilicate glass layers, each of the at least three borosilicate glass layers having a thickness from about 7.5 mm to about 19.5 mm; and wherein each of the exterior polycarbonate sheets is in contact with two of the plurality of exterior aliphatic polyurethane film layers. an exterior side comprising an exterior surface of the ballistic glass and an interior side comprising an interior surface of the ballistic glass; a plurality of borosilicate glass layers, one of the plurality of borosilicate glass layers forming the exterior surface of the ballistic glass; a plurality of exterior aliphatic polyurethane film layers, each of the plurality of borosilicate glass layers separated from an adjacent borosilicate glass layer by at least one of the plurality of exterior aliphatic polyurethane film layers, each of the plurality of exterior aliphatic polyurethane layers in contact with a surface of at least one of the plurality of borosilicate glass layers; an interior polycarbonate sheet having a first surface and a second surface, the second surface of the interior polycarbonate sheet forming the interior surface of the ballistic glass; an interior aliphatic polyurethane film layer in contact with the first surface of the interior polycarbonate sheet, the interior aliphatic polyurethane film layer positioned to separate the first surface of the polycarbonate sheet from a surface of a borosilicate glass layer; and a first exterior polycarbonate sheet, and a second exterior polycarbonate sheet, each exterior polycarbonate sheet having a thickness from about 0.5 mm to about 1.5 mm, the first exterior polycarbonate sheet separated from the second exterior polycarbonate sheet by at least two borosilicate glass layers, each of the at least two borosilicate glass layers having a thickness from about 7.5 mm to about 10.5 mm; wherein each of the exterior polycarbonate sheets are separated from the interior polycarbonate sheet by at least three borosilicate glass layers, each of the at least three borosilicate glass layers having a thickness from about 7.5 mm to about 19.5 mm; and wherein each of the exterior polycarbonate sheets is in contact with two of the plurality of exterior aliphatic polyurethane film layers.

Google Patents

https://patents.google.com/patent/US12540799

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12540799