Unlock instant, AI-driven research and patent intelligence for your innovation.

Flame retardant cellulosic man-made fibres

A cellulose and artificial technology, applied in the manufacture of flame-retardant fibers, single-component cellulose artificial filaments, fire-resistant and flame-retardant filaments, etc., can solve economic disadvantages, obstacles to the successful commercialization of lyocell fibers, and closed-loop systems Incompatibility and other issues

Active Publication Date: 2020-06-19
LENZING AG
View PDF34 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] 2,2'-Oxybis[5,5-dimethyl-1,3,2-dioxaphosphorinane]-2,2'-disulfide is used in the production of flame-retardant cellulose artificial The use of fibers in the Lyocell process fails due to the fact that it has a high yield loss, which not only has an economically disadvantageous effect, but is especially incompatible with the closed-loop system characteristic of this process
Thus, the successful commercialization of lyocell fibers that are inherently flame retardant by incorporation of such flame retardants has hitherto been hampered

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Flame retardant cellulosic man-made fibres
  • Flame retardant cellulosic man-made fibres
  • Flame retardant cellulosic man-made fibres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Example 1: Production of a flame retardant dispersion using a MicroJet Reactor (MJR) and subsequent spinning into flame retardant fibers according to the viscose process:

[0070] The precondensate was prepared analogously to AT 510 909 A1, in which tetrakishydroxymethylphosphonium chloride (THPC) was used instead of tetrakishydroxymethylphosphonium sulfate as the starting component for the reaction with urea.

[0071] The resulting precondensate is subsequently crosslinked with ammonia in a microfluidic reactor. For this purpose, the precondensate obtained in the form of a 10% by weight solution was metered continuously at a pressure of 11 bar as a precondensate stream after addition of 12% by weight, based on the precondensate, of polyvinylpyrrolidone (Duralkan INK 30) Joined on position R1 of MJR. As the ammonia stream, a 1.5% by weight ammonia solution was metered in continuously at position R2 at a pressure of 11 bar. Collect the reaction product exiting on the p...

Embodiment 2

[0076] Example 2: Production of a flame retardant dispersion using a MicroJet Reactor (MJR) and subsequent spinning into flame retardant fibers according to the Lyocell process:

[0077] The precondensate was prepared analogously to AT 510 909 A1, in which tetrakishydroxymethylphosphonium chloride (THPC) was used instead of tetrakishydroxymethylphosphonium sulfate as the starting component for the reaction with urea.

[0078] The resulting precondensate is subsequently crosslinked with ammonia in a microfluidic reactor. For this purpose, the precondensate was obtained in the form of a 10% by weight solution as a precondensate stream at a pressure of 11 bar after addition of 5% by weight, based on the precondensate, of esterified polycarboxylate (Viscocrete P-510) Continuous metering into position R1 of the MJR. As the ammonia stream, a 1.5% by weight ammonia solution was metered in continuously at position R2 at a pressure of 11 bar. Collect the reaction product exiting on t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for producing an oxidised polymer from a tetrakishydroxyalkylphosphonium compound having NH3 or at least one nitrogen compound, comprising at least one NH2 or at least two NH groups, or NH3, comprising the steps of (a) reacting at least one tetrakishydroxyalkylphosphonium compound with NH3 or at least one nitrogen compound, in order to obtain a precondensate, themolar ratio of the tetrakishydroxyalkylphosphonium compound to the nitrogen compound being in the range of 1:(0.05 to 2.0), preferably in the range of 1:(0.5 to 1.5), particularly preferably in the range of 1:(0.65 to 1.2), (b) crosslinking the precondensate obtained in method step (a) using ammonia to form a crosslinked polymer, (c) oxidation of the crosslinked polymer obtained in step (b) by adding an oxidising agent to the oxidised polymer, the precondensate from step (a) and the ammonia each being sprayed, in step (b), by means of a nozzle into a reactor chamber surrounded by a reactor housing and onto a common collision point.

Description

[0001] The present invention relates to a process for the production of oxidized polymers from tetrakishydroxyalkylphosphonium compounds and at least one nitrogen compound, comprising the steps of: reacting at least one tetrakishydroxyalkylphosphonium compound with at least one nitrogen compound to obtain a precondensate , wherein the molar ratio of the tetrahydroxyalkylphosphonium compound to the nitrogen compound is in the range of 1:(0.05 to 2.0), preferably in the range of 1:(0.5 to 1.5), particularly preferably in the range of 1:(0.65 to 1.2); crosslinking the previously obtained precondensate by means of ammonia to form a crosslinked polymer; and oxidizing the previously obtained crosslinked polymer to an oxidized polymer by adding an oxidizing agent. Furthermore, the present invention relates to a method for producing flame-resistant cellulosic artificial products from dopes, the method comprising providing polymers from tetrakishydroxyalkylphosphonium compounds and mixing...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/00D06M13/322B01F5/02D01F1/07
CPCD06M13/322D01F1/07D01F2/00B01F25/23D06M2200/30D01F2/08D06M2101/06B01F2101/2805
Inventor H.菲戈C.比贾克
Owner LENZING AG