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Method of preparing prepolymer particle

A technology of prepolymers and particles, which is applied in the preparation of carboxylic acid amides, chemical instruments and methods, and the preparation of organic compounds, etc. It can solve problems such as carbonization or degradation, melting of condensation polymers, and decolorization of condensation polymers

Inactive Publication Date: 2015-03-18
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is concern that condensation polymers such as nylon resins etc. may suffer discoloration after contact with oxygen at high temperatures
Additionally, condensation polymers have a high potential to melt, carbonize, or degrade

Method used

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  • Method of preparing prepolymer particle
  • Method of preparing prepolymer particle
  • Method of preparing prepolymer particle

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preparation example Construction

[0032]The method for preparing prepolymer particles according to the present invention adopts a bottom-up type flash evaporation process, which can ensure sufficient cooling time of prepolymer particles. For this reason, discoloration, melting, carbonization or degradation of the prepolymer particles due to the temperature used to heat the flash reactor and the latent heat of the final prepolymer particles can be reduced or suppressed.

[0033] Therefore, the method for producing prepolymer particles according to the present invention can omit post-treatment after producing prepolymer particles, thereby providing economical feasibility. When prepolymer particles are used in solid state polymerization, the final polymer obtained has good yield and color.

Embodiment 1 to 3

[0038] To a 1-liter autoclave, terephthalic acid (TPA), adipic acid (AA) and isophthalic acid (IPA) were added as dicarboxylic acid components in the amounts listed in Table 1, and as diamine The 1,6-hexamethylenediamine (HDMA) of component, then based on 100 molar parts of dicarboxylic acid component and diamine component, add 1.5 molar parts of acetic acid as a capping agent, 0.1 weight part of sodium phosphinate (sodium hypophosphinate) as a catalyst and 38 parts by weight of water (based on 100 parts by weight of dicarboxylic acid component and diamine component), and then purged with nitrogen. Next, the obtained material was stirred at 210° C. for 60 minutes, then heated to 230° C. for 1 hour, and then reacted for 1 hour while maintaining a pressure of 20 bar to 30 bar to prepare a prepolymer in a solution state. Subsequently, through the flash reactor (internal temperature: 25 ° C, internal pressure: 0 bar to 2 bar, cylindrical shape, height: 5m, volume: 4m 3 , see fig...

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Abstract

Disclosed herein is a method of preparing prepolymer particles. The method includes injecting a prepolymer in a solution state by bottom-up type injection to form prepolymer particles by removing a solvent from the prepolymer in a solution state. The method can prepare prepolymer particles, which can be used in solid-state polymerization, using a bottom-up type flash process.

Description

technical field [0001] The present invention relates to a process for the preparation of prepolymer particles. More specifically, the present invention relates to a method for preparing prepolymer particles that can be used for solid-state polymerization using a bottom-up type flash method (bottom-up type flash method). Background technique [0002] In the aerosol method or the flash method, which are widely known polymerization methods, a low-molecular-weight polymer is polymerized in a solution state, and then subjected to granulation (crystallization) by injection from high pressure to normal pressure. More specifically, the flash evaporation method involves subjecting a polymer (liquid prepolymer) that has been polymerized to a certain extent under high temperature and high pressure conditions to normal-pressure injection through an orifice or the like to evaporate a solvent used in polymer polymerization, The granulated (granulated) polymer from which the solvent has e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/12B01D1/18
CPCC07C231/02C08G69/265C08G69/28C08J3/12C07C233/78B01J2/02B01J19/00
Inventor 金秦圭权素煐任相均李基渊全锡珉裴国建
Owner SAMSUNG SDI CO LTD