Patent · US Expired

Acrylic precursor fibers suitable for preparing carbon or graphite fibers

US4336022A · kind A · utility

14Cited by

14References

3Claims

0Family size

Assignee

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

Inventors

Charles E. Lynch · Camden, US
William K. Wilkinson · Waynesboro, US

Key dates

Filing date	Jan 30, 1981
Grant date	Jun 22, 1982
Priority date	—
Expiry date	Jan 30, 2001

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F220/46
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

An acrylic fiber useful in the preparation of precursor fibers for the preparation of carbon or graphite fibers contains 93.0-99.4 mol percent acrylonitrile, 0.6-4.0 mol percent of ammonium or amine having a pKb of 5 or less as neutralizing cations for sulfonate and sulfate end groups derived from the initiator and activator and as neutralizing cations for sulfonate groups derived from one or more sulfonic acid containing comonomers and 0-3.0 mol percent of one or more comonomers selected from the group consisting of simple acrylate or methacrylate esters, simply vinyl esters, styrene, vinyl chloride and vinylidene chloride, the fiber containing no more than 0.3 mol percent of cations other than ammonium or amine.

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