Patent · US Active

Transparent light-weight safety glazings

US7919175B2 · kind B2 · utility

14Cited by

61References

24Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

Stephen J. Bennison · Wilmington, US
David F. Kristunas · Townsend, US
Andres Ovalle · Bogota, CO

Key dates

Filing date	Nov 13, 2009
Grant date	Apr 5, 2011
Priority date	—
Expiry date	Nov 13, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31649
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

Provided is a transparent and light-weight ballistic resistant safety glazing comprising an ionomer sheet. The ionomer sheet comprises an ionomer derived from a parent acid copolymer that comprises copolymerized units of an α-olefin having 2 to 10 carbon atoms and, based on the total weight of the acid copolymer, about 20 to about 30 wt % of copolymerized units of an α,β-ethylenically unsaturated carboxylic acid having 3 to 8 carbon atoms. The ionomer is neutralized to a level of about 5% to about 90%, based on the total carboxylic acid content of the acid copolymer, and further comprises at least one cation. Further provided are articles comprising the light-weight ballistic resistant safety glazing.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.