Patent · US Expired

Fire resistant laminar cushioning material

US4948648A · kind A · utility

8Cited by

3References

29Claims

0Family size

Assignee

Ethyl Corporation · US

Inventors

Billie B. Dadgar · Baton Rouge, US
Thomas Walter · Penzberg, DE

Key dates

Filing date	Dec 11, 1989
Grant date	Aug 14, 1990
Priority date	—
Expiry date	Dec 11, 2009

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/249981
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A composite fire resistant laminar cushioning material is disclosed. The material comprises a foamed polyphosphazene upper lamella and a foamed polyurethane lower lamella. The foamed polyphosphazene further comprises a lamelliform substantially unfoamed outer first layer and a substantially foamed second layer. The cushioning material is capable of passing the Cal-133 flammability test.

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