Patent · US Active

Process of making flame retardant cellulosic man-made fibers

US9988743B2 · kind B2 · utility

1Cited by

35References

9Claims

0Family size

Assignee

LENZING AKTIENGESELLSCHAFT · AT

Inventors

Hartmut Ruf · Rötteln, DE
Clemens Bisjack · Vöcklabruck, AT
Gert Kroner · Seewalchen, AT

Key dates

Filing date	Dec 9, 2011
Grant date	Jun 5, 2018
Priority date	—
Expiry date	Nov 21, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T442/696
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The invention relates to flame-retardant cellulosic man-made fibers containing a flame-retardant substance in the form of an oxidized condensate of a tetrakis hydroxyalkyl phosphonium salt with ammonia and/or a nitrogenous compound which contains one or several amine groups whereby the fiber has a tenacity of more than 18 cN/tex in a conditioned state. Production process and the use of the fibers according to the invention are further objects of the invention.

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