Patent · US Expired

Flame-resistant polymethacrylimide foams

US5698605A · kind A · utility

4Cited by

5References

16Claims

0Family size

Assignee

Roehm GmbH Chemische Fabrik · DE

Inventors

Manfred Krieg · Darmstadt, DE
Werner Geyer · Heilbad Heiligenstadt, DE
Wolfgang Pip · Darmstadt, DE

Key dates

Filing date	Feb 24, 1997
Grant date	Dec 16, 1997
Priority date	—
Expiry date	Feb 24, 2017

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2463/00
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A composition includes a polymethacrylimide polymer which is polymerized in the presence of an epoxy resin and a flame-inhibiting agent. Further, a process is described for making flame-resistant polymethacrylimide, which includes mixing an epoxy resin and a flame-inhibiting agent with a methacrylic acid and methacrylonitrile, and polymerizing. A polymethacrylimide foam so prepared has an LOI value of at least 25 and retains the good mechanical properties that are associated with polymethacrylimide foams.

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