Ionic monomer containing benzo heterocyclic sulfonate structure, ionomer using same for flame resistance and molten resistance, and preparation method and application thereof

A technology of heterocyclic sulfonates and ionic monomers, applied in the manufacture of fire-retardant and flame-retardant filaments, one-component copolyester rayon, organic chemistry, etc., can solve the problems of affecting the cost and introducing a large amount of monomers, etc. , to achieve the effect of increasing the melt strength, suppressing the droplet phenomenon, and improving the ability to resist the droplet effect.

Active Publication Date: 2019-07-30
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN 108395526 A discloses another kind of flame retardant and anti-melt drop copolyester containing benzimidazole structure. The copolyester has good flame retardant and anti-melt drop performance. The V-0 level of the vertical combustion test, the limiting oxygen index reaches 34.0%, but the above two copolyesters have the problem of introducing more monomers, which will affect their cost

Method used

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  • Ionic monomer containing benzo heterocyclic sulfonate structure, ionomer using same for flame resistance and molten resistance, and preparation method and application thereof
  • Ionic monomer containing benzo heterocyclic sulfonate structure, ionomer using same for flame resistance and molten resistance, and preparation method and application thereof
  • Ionic monomer containing benzo heterocyclic sulfonate structure, ionomer using same for flame resistance and molten resistance, and preparation method and application thereof

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Effect test

Embodiment 1

[0059] In the reaction vessel, add 40g of isophthalic acid-5-sodium sulfonate, 75g of methyl 3,4-diaminobenzoate, 63.5g of EDCI (condensing agent), 45g of HOBT (condensing agent) and 4.500L of DMF, and stir at room temperature for 24h , the obtained clear solution was evaporated to remove the solvent, 2L of glacial acetic acid was added, and a white solid was precipitated under reflux at 140°C, filtered by suction, washed with water, and dried to obtain 1,3-bis(5-(4-methoxy Sodium carbonyl-1H-benzimidazol-2-yl)-5-benzenesulfonate.

Embodiment 2

[0061] In the reaction vessel, add 85g of isophthalic acid-5-potassium sulfonate and disperse it in thionyl chloride and reflux for 3h to prepare the corresponding acid chloride, and then slowly drop it into 150g of 4-amino-3-hydroxybenzoic acid formic acid In the DMF solution of the ester, stir at room temperature for 12 hours, add dehydrating agent p-toluenesulfonic acid, reflux and stir at 120-160°C for 8 hours, pour the solution into a large amount of deionized water while it is hot, and precipitate a large amount of solids, filter with suction, wash with water, and wash with alkali. After washing with water and drying, potassium 1,3-bis(5-(4-methoxycarbonyl-1H-benzoxazol-2-yl)-5-benzenesulfonate can be obtained.

Embodiment 3

[0063] In the reaction vessel, add 40g sodium 2,4-dicarboxybenzenesulfonate, 75g methyl 3,4-diaminobenzoate, 63.5g EDCI (condensing agent), 45g HOBT (condensing agent) and 4.5L DMF, and stir at room temperature for 24h , the obtained clear solution was evaporated to remove the solvent, added 2L glacial acetic acid, refluxed at 140°C, a white solid precipitated, filtered with suction, washed with water, and dried to obtain 1,3-bis(5-(4-methoxy Sodium carbonyl-1H-benzimidazol-2-yl)-4-benzenesulfonate.

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Abstract

The invention discloses an ionic monomer containing a benzo heterocyclic sulfonate structure, an ionomer using the same for flame resistance and molten resistance, and a preparation method and application thereof. The ionomer for flame resistance and molten resistance is prepared by esterifying a copolyester monomer of dibasic acid or ester thereof and C2-C8 polyol, a catalyst and the ionic monomer containing the benzo heterocyclic sulfonate structure with a structural general formula as shown in the specification by a direct esterification method or an ester exchange method through a polycondensation reaction, wherein the ionic monomer containing the benzo heterocyclic sulfonate structure can form an ionic cluster in a molecular chain of the ionomer to form a stable physical crosslinkingnetwork; In addition, the ionomer has good carbon-forming property, when the ionomer is introduced with a low content, not only can the melt strength of the polymer be increased, but also stable and compact carbon layer can be formed to restrain the molten drop phenomenon, so that the ionomer can be used to prepare textile fibers and cationic dyeable polyester textiles, engineering plastics and packaging materials at room temperature. The preparation method is mature, simple and convenient, and industrial production can be easily achieved.

Description

technical field [0001] The invention belongs to the technical field of reactive monomers and their flame-retardant and anti-droplet copolyester ionomers and their preparation. Specifically, the invention relates to an ionic monomer containing a benzoheterocyclic sulfonate structure 1. Using the flame-retardant anti-droplet copolyester ionomer and its preparation method and application. Background technique [0002] Semi-aromatic polyesters, such as polyethylene terephthalate (PET), are widely used in packaging materials, textile fibers, Engineering plastics and other fields. However, pure PET is a flammable material with violent combustion and high calorific value. At the same time, a large number of molten droplets will be produced during combustion, which also limits the further application of this polyester. [0003] Usually, the flame-retardant modification of polyester is mainly based on adding phosphorus-based flame retardants, because phosphorus-based flame retardan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/688C08G63/86D01F6/84D01F1/07C08J5/18C07D235/18C07D263/57C08L67/02
CPCC08G63/6886C08G63/866D01F6/84D01F1/07C08J5/18C07D235/18C07D263/57C08J2367/02
Inventor 王玉忠吴万寿倪延朋陈琳付腾汪秀丽段平慧
Owner SICHUAN UNIV
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