Patent · US Expired

Oxazolidinone structures-containing prepolymeric epoxy mixture

US5527874A · kind A · utility

0Cited by

1References

17Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Helmut Markert · Nuremberg, DE
Armin Datz · Baiersdorf, DE
Peter Donner · Espoo, FI
Michael Schreyer · Weisendorf, DE

Key dates

Filing date	Mar 27, 1995
Grant date	Jun 18, 1996
Priority date	—
Expiry date	Mar 27, 2015

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29C48/87
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

In a process for producing a prepolymer epoxy resin mixture with oxazolidinone structures, an insoluble reaction resin powder which has no isocyanate groups and consists of an epoxy resin mixture containing a reaction accelerator and filler and having isocyanurate structures, is fed to a continuously working reactor and reacted at temperatures up to 200.degree. C., with reactor temperature at 140.degree.-190.degree. C., and then the extruded material is cooled down to a temperature of <50.degree. C. with the aid of a cooling device mounted at the outlet die of the reactor.

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