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Cationic dye dyeable polyester and application thereof

A cationic dye, polyester technology, applied in conjugated synthetic polymer rayon, chemical characteristics of fibers, textiles and papermaking, etc., can solve the problems of low production efficiency, troublesome switching of varieties and batches, and inability to obtain good results, etc. Achieve the effect of low production cost, excellent dyeing performance and fiber properties, and flexibility of production equipment

Inactive Publication Date: 2012-05-23
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are differences between batches of polyester produced by this method, which affects the final performance of polyester. At the same time, the production efficiency is low, and the batch number of the product produced is single. It is troublesome to switch the variety batch number during production. In addition, at the same time, the requirements for the production process Relatively high, which increases the production cost; as far as the current market technology is concerned, some manufacturers use cationic dye-dyeable polyester masterbatches to blend with matrix polyester to obtain multiple batches of products, but they still cannot solve the problem of cationic dye-dyeable polyester masterbatches. The problem of low yarn physical properties after mixing polyester masterbatch and matrix polyester
[0004] Regarding the problem of low physical properties of yarn after mixing cationic dyeable polyester masterbatch and matrix polyester, some literatures have also mentioned the use of dispersants and other substances to improve the problem of low physical properties of yarn after mixing, but with the new The addition of components reduces the thermal performance of the polyester after blending, especially in industrial continuous production, still can not get good results
[0005] There are few reports on the flexible application of existing continuous polymerization equipment and tank polymerization equipment to produce polyester

Method used

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  • Cationic dye dyeable polyester and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Take 13.9 parts by weight of dimethyl terephthalate, 10.4 parts by weight of ethylene glycol and 1.2 parts by weight of dimethyl isophthalate-5-sodium sulfonate, add them to the reaction kettle with heating and stirring, and then add After 0.3% by weight of manganese acetate and 2.4% by weight of lithium acetate relative to the polyester, the temperature is gradually raised to carry out the transesterification reaction, and methanol is gradually distilled out. When the distilled methanol amount reaches more than 95% of the theoretical amount, the transesterification reaction is completed. , move the reaction product to the polymerization tank, add the phosphorus compound trimethyl phosphate, antioxidant IR1010, antifoaming agent silicone oil, etc., then gradually raise the temperature to about 280-290 degrees, and reduce the pressure to below 100Pa to react for 1-3 hours After reaching the required polymer viscosity, spit out, cool and cut into pellets, the cationic dyea...

Embodiment 2

[0054] In the preparation process of cationic dye-dyeable polyester masterbatch, the sulfur element content in polyester masterbatch was increased to 0.89wt% by changing the addition amount of dimethyl isophthalate-5-sodium sulfonate. In the process of blending with the base polyester, add CBT-100 accounting for 10wt% of the total amount of cationic dye-dyeable polyester, the ratio of cationic dye-dyeable polyester masterbatch to base polyester is 1:2, other steps With embodiment 1.

Embodiment 3

[0056] In the preparation process of cationic dye-dyeable polyester masterbatch, the content of sulfur element in polyester masterbatch was increased to 0.89wt% by changing the addition amount of dimethyl isophthalate-5-sodium sulfonate. During the blending process of polyester masterbatch and matrix polyester, CBT-100, which accounts for 0.1wt% of the total amount of cationic dye-dyeable polyester, is added, and the ratio of cationic dye-dyeable polyester masterbatch to matrix polyester is 1: 2, other steps are the same as in Example 1.

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Abstract

The invention discloses a cationic dye dyeable polyester and an application thereof. The cationic dye dyeable polyester is prepared by the following the steps of: (1) synthesizing a cationic dye dyeable polyester master batch: copolymerizing a m-phthalic acid sulfonate unit with an aromatic dibasic acid unit and a dihydric alcohol unit to obtain the cationic dye dyeable polyester master batch; and (2) preparing the cationic dye dyeable polyester: melting and mixing the cationic dye dyeable polyester master batch, a substrate polyester and a low-molecular-weight annular polyester in equipment with a mixer to obtain the cationic dye dyeable polyester. The cationic dye dyeable polyester can be applied to preparation of cationic dye dyeable fibers. The prepared polyester has the advantages of excellent performance, superior physical property, simple manufacturing method, wide equipment application range and low production cost.

Description

technical field [0001] The invention relates to a cationic dye-dyeable polyester and its use for preparing fibers. Background technique [0002] Polyethylene terephthalate in polyester has outstanding properties and is widely used in the fields of fibers and films, especially in the fields of clothing and industrial materials. [0003] Generally, the common dyeing of polyester fiber is dyed with disperse dyes according to the molecular structure. This kind of dyeing process not only requires high dyeing temperature, but also it is difficult to obtain brightly dyed textiles. In order to improve the dyeing performance of polyester fiber, the current technology has been researched for a long time on the subject of especially giving polyester fiber the dyeability of cationic dyes. Among them, improving polymer properties through copolymerization technology is one of the main means; mainly by adding ethylene glycol isophthalate-5-sodium sulfonate (SIPE) during the polymerization...

Claims

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Application Information

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IPC IPC(8): C08L67/00C08L67/02C08G63/688D01F8/14D01F1/10
Inventor 柏立军李旭望月克彦
Owner TORAY FIBER RES INST(CHINA) CO LTD
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