Cation dyeable flame-retardant polyester and preparation method thereof

A flame-retardant polyester and cationic technology, applied in the direction of single-component polyester rayon, rayon manufacturing, and fiber chemical characteristics, can solve the problems of poor color tone, poor light resistance, and low polymerization performance of polymers, and achieve Excellent color tone, good spinning performance and low DEG content

Active Publication Date: 2013-05-29
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polymer obtained by the above method has disadvantages such as poor color tone and poor light resistance, and when the flame retardant is added too much, it will lead to low polymerization performance.

Method used

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  • Cation dyeable flame-retardant polyester and preparation method thereof
  • Cation dyeable flame-retardant polyester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] First, the phosphorus compound B shown in the following formula 6 is esterified with ethylene glycol at 230° C. to obtain an ethylene glycol solution with an esterification rate of 90% and a flame retardant A concentration of 60% shown in formula 5.

[0056] Formula 6

[0057] Formula 5

[0058] A certain amount of dimethyl terephthalate and ethylene glycol, dimethyl isophthalate-5-sodium sulfonate, catalyst antimony trioxide, alkali metal compound lithium acetate, and cobalt acetate are added to the first reaction tank, The reaction was carried out for 4 to 6 hours. Wherein the addition of dimethyl isophthalate-5-sodium sulfonate is 0.17wt% of sulfur element relative to the total amount of polyester, and the addition amount of catalyst antimony trioxide is based on antimony element relative to the total amount of polyester 334ppm, the addition amount of alkali metal compound lithium acetate was 34ppm as lithium element relative to the total amount of polyester, a...

Embodiment 2～6

[0061] Change the addition amount of substance, other is with embodiment 1, specifically see attached table 1 and 2.

Embodiment 7～10

[0063] The catalyst used is tetrabutyl titanate, and its addition amount is 8ppm in terms of titanium element relative to the total amount of polyester. Others are the same as in Example 1. See attached tables 1 and 2 for details.

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Abstract

The invention discloses normal-pressure cation dyeable flame-retardant polyester and a preparation method thereof. The preparation method includes: subjecting monomer aromatic dicarboxylic acid or derivatives thereof, alkylidence diol and isophthalic acid containing metal sulfonate or derivatives thereof to polycondensation under conditions of phosphorous based flame retardant, catalyst and auxiliaries, wherein the phosphorous flame retardant is reactive phosphorous flame retardant, phosphorous content in polyester is 2000-20000ppm in the total polyester. The tone value b of the polyester is smaller than 6, the DEG (diethylene glycol) content is lower than 2.5wt%, light fastness of fabric obtained by spinning and high-order processing the polyester can be up to the fouth or above level. The normal-pressure cation dyeable flame-retardant polyester has lasting and excellent flame retardancy is high in thermal stability, good in spinnability, excellent in tone and good in light fastness.

Description

technical field [0001] The invention relates to a cationic dyeable flame-retardant polyester and a manufacturing method thereof. Background technique [0002] Polyester, especially polyethylene terephthalate, is widely used in fiber, film and other fields because of its outstanding performance, and is favored by people. [0003] However, because PET has a regular molecular structure, is easy to crystallize, and has no easy-to-dye functional groups, although it can be dyed with disperse dyes under high temperature and high pressure, the production conditions are harsh and the cost is high. In terms of flame retardancy, the limiting oxygen index of ordinary PET is 20-24. Under normal conditions, it is easy to burn when exposed to an open flame, and its flame retardancy is poor. [0004] The flame retardants used for flame-retardant modification of polyester are mainly halogen-containing and phosphorus-containing flame retardants. Since halogen belongs to the gas-phase flame-r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/692C08G63/688C08G63/78C08K5/098C08K5/521D01F6/92D01F1/10
Inventor 成娟李旭望月克彦
Owner TORAY IND INC
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