Patent · US Expired

Porous polytetrafluoroethylene and a process for the production thereof

US5403524A · kind A · utility

12Cited by

9References

6Claims

0Family size

Inventors

Wolfgang Burger · Burgrain, DE
Richard Witzko · Günzburg, DE

Key dates

Filing date	Mar 16, 1994
Grant date	Apr 4, 1995
Priority date	—
Expiry date	Mar 16, 2014

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2427/00
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A new porous polytetrafluoroethylene (PTFE) and a process for the production thereof is provided. Both the PTFE and the process excel by the fact that polytetrafluoroethylene is radiation-chemically degraded, the degraded polytetrafluoroethylene is mixed with a high-molecular emulsion polymerisate of polytetrafluoroethylene and the mixture is extruded, stretched and may additionally be sintered.

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