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Thermotropic flame-retardant anti-dripping aromatic liquid crystal copolyester and preparation method thereof

An aromatic, anti-melting droplet technology, applied in liquid crystal materials, chemical instruments and methods, etc., can solve the problems of increasing production costs, expensive liquid crystal polyarylate monomers, etc., achieve low melting processing temperature, reduce droplet phenomenon, The effect of excellent flame retardant and anti dripping performance

Active Publication Date: 2021-04-06
上海航永光电新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, if the main chain of liquid crystal polyarylate is a rigid linear structure, it needs to be melted at a higher temperature (above 300°C) before it can be formed, and the monomer of liquid crystal polyarylate is relatively expensive, which will further increase the production capacity. cost

Method used

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  • Thermotropic flame-retardant anti-dripping aromatic liquid crystal copolyester and preparation method thereof
  • Thermotropic flame-retardant anti-dripping aromatic liquid crystal copolyester and preparation method thereof
  • Thermotropic flame-retardant anti-dripping aromatic liquid crystal copolyester and preparation method thereof

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Embodiment 1

[0046] The thermotropic flame retardant and droplet resistant aromatic liquid crystal copolyester of this embodiment has the following chemical structural formula:

[0047]

[0048] Wherein, n=2~20, m=90~100;

[0049]Add 4,4'-dihydroxybiphenyl, terephthalic acid, 2,6-naphthalene dicarboxylic acid, terephthalic acid, and Hydroxybenzoic acid, PET particles, N-(3-carboxyphenyl)-4-phenylethynylphthalimide and N-(3-hydroxyphenyl)-4-phenylethynylphthalimide Imide; 150 ml of acetic anhydride was added, with 0.1 wt % potassium acetate as catalyst; the flask was equipped with a sealed glass paddle stirrer, a nitrogen inlet tube and an insulated distillation head. Nitrogen flow was introduced, and the reaction mixture was acetylated at 120°C for 30 minutes in a quicksand bath, and then the temperature was raised to 340°C at a rate of 1.5°C / min for 1 hour of transesterification. At this point, the reaction system was slowly evacuated to a vacuum degree of 1 mbar and the temperature ...

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Abstract

The invention discloses a thermotropic flame-retardant anti-dripping aromatic liquid crystal copolyester and a preparation method thereof. The aromatic liquid crystal copolyester comprises a main chain formed by copolymerization of rigid mesogenic elements and polyester granules, and an end-capping group is phenylacetylene or norbornene acetylene group, a mesogenic unit is composed of a wholly aromatic diphenol monomer, a wholly aromatic diacid monomer and an AB-type wholly aromatic monomer containing a terminal carboxyl group A and a terminal hydroxyl group B at the same time. The aromatic liquid crystal copolyester disclosed by the invention has lower melting processing temperature and flame-retardant and anti-dripping properties, can effectively reduce life and property loss caused by fire disasters, has a wide application prospect in the fields of civil textiles and high-temperature protective materials, is controllable in molecular weight in the polymerization process, is simpler, more convenient, efficient and environment-friendly in the preparation process, and generates no harmful gas during combustion.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a thermotropic flame-retardant and droplet-resistant aromatic liquid crystal copolyester and a preparation method thereof. Background technique [0002] As a widely used high polymer material, semi-aromatic polyester has been widely used in civil and industrial fields due to its high strength, high modulus, and low water absorption characteristics. Polyester fiber, also known as polyester, occupies most of the chemical fiber industry. The types of polyesters that have been marketed include PET, PBT, PTT and so on. Because the polymer will undergo reactions such as oxidation and degradation at high temperatures, once it is burned, it is easy to form a fire, which will seriously affect the safety of people's lives and properties. Therefore, it is of great significance to improve the flame retardancy of polyester materials. [0003] The more mature polyester flame retardant modif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/685C09K19/38
CPCC08G63/6856C09K19/3809
Inventor 陈导刘萍
Owner 上海航永光电新材料有限公司
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