Industrial production process of liquid crystal polyester film

A liquid crystal polyester and polyimide film technology, which is applied in applications, household appliances, flat products, etc., can solve problems such as low production efficiency and poor product performance, and achieve the goal of improving rigidity, toughness, and crystallinity Effect

Active Publication Date: 2019-08-30
陈祚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The invention provides an industrial production process of liquid crystal polyester film, the purpose of which is to overcome defects such as poor product performance and low production efficiency caused by the current production process of liquid crystal polyester film

Method used

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  • Industrial production process of liquid crystal polyester film
  • Industrial production process of liquid crystal polyester film
  • Industrial production process of liquid crystal polyester film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047]A part of hydroquinone, terephthaloyl chloride and chloroform are added to the stirred tank at a molar ratio of 1.0:1.0:3.3, and the reaction is carried out under the condition that the lid of the stirred tank is vacuumed and the reaction temperature is controlled at -3.0°C. 45min, where the vacuum degree is -0.066MPa, gradually increase the temperature of the stirred tank to 58°C, and under the condition of a stirring speed of 93rpm, until the material in the stirred tank becomes 1.0mm granular under the action of the stirring blade When adding p-hydroxybenzoic acid, hydroquinone terephthalic acid, 2-hydroxy-6-naphthoic acid, acetic anhydride and trifluoromethanesulfonic acid, all p-hydroxybenzoic acid and hydroquinone in the stirred tank , terephthalic acid, terephthaloyl chloride, 2-hydroxyl-6-naphthoic acid, acetic anhydride, the mol ratio of trifluoromethanesulfonic acid raw materials become 0.6: 0.15: 0.075: 0.15: 0.10: 1.06: 0.33; gradually Raise the temperature o...

Embodiment 2

[0052] Add a part of hydroquinone, terephthaloyl chloride and chloroform into the stirred tank at a molar ratio of 1.0:1.0:3.3, and react for 18 minutes under the condition that the lid of the stirred tank is vacuumed and the reaction temperature is controlled at 3.0°C. , where the vacuum degree is -0.048MPa, gradually raise the temperature of the stirring tank to 68°C, and under the condition of a stirring speed of 61rpm, until the material in the stirring tank becomes 1.0mm granular under the action of the stirring blade , add p-hydroxybenzoic acid, hydroquinone terephthalic acid, 2-hydroxyl-6-naphthoic acid, acetic anhydride, trifluoromethanesulfonic acid, make all p-hydroxybenzoic acid, hydroquinone, The mol ratio of terephthalic acid, terephthaloyl chloride, 2-hydroxy-6-naphthoic acid, acetic anhydride, trifluoromethanesulfonic acid raw material becomes 0.8: 0.07: 0.05: 0.04: 0.06: 1.09: 0.48; The temperature of the stirred tank was raised to 158°C, and kept for 1 hour at...

Embodiment 3

[0057] A part of hydroquinone, terephthaloyl chloride and chloroform are added to the stirred tank at a molar ratio of 1.0:1.0:3.3, and the reaction is carried out under the condition that the lid of the stirred tank is vacuumed and the reaction temperature is controlled at -1.0°C. 23min, where the vacuum degree is -0.051MPa, gradually increase the temperature of the stirred tank to 61°C, and under the condition of a stirring speed of 66rpm, until the material in the stirred tank becomes 1.3mm granular under the action of the stirring blade When adding p-hydroxybenzoic acid, hydroquinone terephthalic acid, 2-hydroxy-6-naphthoic acid, acetic anhydride and trifluoromethanesulfonic acid, all p-hydroxybenzoic acid and hydroquinone in the stirred tank , terephthalic acid, terephthaloyl chloride, 2-hydroxyl-6-naphthoic acid, acetic anhydride, the mol ratio of trifluoromethanesulfonic acid raw materials become 0.68: 0.11: 0.06: 0.10: 0.10: 1.07: 0.38; gradually Raise the temperature ...

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Abstract

The invention discloses an industrial production process of a liquid crystal polyester film. The process uses p-hydroxybenzoic acid, hydroquinone, terephthalic acid, terephthaloyl chloride, 2-hydroxy-6-naphthoic acid, acetic anhydride and trifluoromethanesulfonic acid as raw materials to synthesize a prepolymer for a liquid crystal polyester copolymer, the prepolymer is extruded to form prepolymersheets, the prepolymer sheets are subjected to crushing, dicing and drying process, after internal mixing, a melt is extruded into a sandwich structure containing polyimide film-liquid crystal polyester melt-polyimide film through a T-shaped mold, and then the sandwich structure is cooled to form a primary liquid crystal polyester film containing a liquid crystal polyester copolymer; after bidirectional stretching, the primary liquid crystal polyester film is cooled and shaped to form a sandwich structure containing the liquid crystal polyester copolymer film, then the polyimide film on the surface is separated and removed from the surface of the liquid crystal polyester film, and the stripped liquid crystal polyester film is coiled to form a liquid crystal polyester film. The liquid crystal polyester film produced by adopting the technology is widely applied to the fields of electronics, electric appliances, automobiles, machinery, aviation, aerospace, chemical industry and the like.

Description

technical field [0001] The invention belongs to the field of industrial production of liquid crystal polyester new materials, and in particular relates to an industrial production process of liquid crystal polyester film. Background technique [0002] The English name of liquid crystal polymer is LIQUID CRYSTAL POLYMER, or LCP for short. It is a new type of polymer material, which is generally isotropic in the molten state and has excellent heat resistance and molding processability. Mainly, fully aromatic LCP is mostly supplemented by solid-state polycondensation to produce high molecular weight products. Non-completely aromatic LCP materials are often produced by one-step or two-step melt polymerization, and the technology of continuous melt polycondensation to produce high molecular weight LCP has been developed. , tensile strength and flexural modulus can exceed the developed various thermoplastic engineering plastics, mechanical properties, dimensional stability, optica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C69/00B29C48/08B29C71/02B29C65/02B29C55/12B29B7/00B29B9/04B29L7/00B29L9/00
CPCB29B7/002B29B9/04B29C71/02B29L2007/00B29L2009/00B29C48/0018B29C48/0021B29C48/08B29C48/885
Inventor 陈祚
Owner 陈祚
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