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Method for continuously and rapidly producing polyester product and application thereof

A polyester and product technology, applied in the field of continuous and rapid production of polyester products, can solve the problems of unfavorable production safety, high melt viscosity, high energy consumption and other problems of finished product enterprises, achieve low working power requirements, optimize process flow, reduce side effects The effect of the reaction

Pending Publication Date: 2022-06-14
江苏睿安应用生物技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chain extenders play a very important role in improving the intrinsic viscosity and mechanical properties of polyester and adhesives in the synthesis of polyesters and adhesives. However, due to different production processes, chain extenders are often accompanied during the preparation process. Harmful side reactions occur, which is detrimental to the quality of finished products and the safe production of enterprises
[0003] CN201410008404 discloses a method for continuous polymerization of chain-extended modified polyester, which has high melt viscosity, high requirements for mixing and stirring equipment, and large energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] 1. The raw materials for the preparation of the esteride are evenly mixed and put into the reactor for esterification reaction;

[0031] 2. The esterification melt is pumped out of the esterification by the melt metering gear pump, and the melt pipe is cooled and injected with a chain spreader into the esterification melt;

[0032] 3. The esterification melt enters the melt mixing device together with the chain spreader and mixes evenly into the homogenizer, and the chain expansion homogenization reaction is carried out in the homogenizer to obtain the first polyester melt;

[0033] 4. The first polyester melt enters the prepolymerization kettle for prepolymerization reaction, and the second polyester melt is obtained;

[0034] 5. The second polyester melt enters the polycondensation kettle for polymerization reaction, and the third polyester melt is obtained;

[0035] 6. The third polyester melt enters the tackifier kettle for tackification reaction, and the fourth polyest...

Embodiment approach

[0044] As an preferred embodiment, the temperature of the melt mixing device is 120-220 ° C.

[0045] Preferably, the temperature of the melt mixing device is 150-200 ° C.

[0046] The applicant found in the actual production that after mixing the chain spreader with the polyester melt, the reaction in advance will often occur in advance due to the high temperature in the pipeline before entering the homogenizer, but the reaction is not carried out in the homogenizer because it cannot be well dispersed, so that the viscosity of the prepared polyester product is uneven, and if the temperature of the melt pipe and the temperature of the melt mixing device are too low, it will make the polyester melt harden, which is not conducive to further homogenization and tacking, therefore, When the temperature of the melt pipe and the temperature of the melt mixing device are 150-200 ° C, it can not only inhibit the early reaction of the chain spreader and the polyester melt, but also maintain...

Embodiment 1

[0087] Example 1 provides a method of continuous rapid production of polyester products, comprising the following steps:

[0088] 1. The raw materials for the preparation of the esteride are evenly mixed and put into the reactor for esterification reaction;

[0089] 2. The esterification melt is pumped out of the esterification by the melt metering gear pump, and the melt pipe is cooled and injected with a chain spreader into the esterification melt;

[0090] 3. The esterification melt enters the melt mixing device together with the chain spreader and mixes evenly into the homogenizer, and the chain expansion homogenization reaction is carried out in the homogenizer to obtain the first polyester melt;

[0091] 4. The first polyester melt enters the prepolymerization kettle for prepolymerization reaction, and the second polyester melt is obtained;

[0092] 5. The second polyester melt enters the polycondensation kettle for polymerization reaction, and the third polyester melt is obt...

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Abstract

The invention relates to the field of polyester, in particular to a method for continuously and rapidly producing a polyester product and application of the method, and the method comprises the following steps: 1, pumping out an esterification melt from an esterified substance by a melt metering gear pump, and injecting a chain extender into the esterification melt after a melt pipeline is cooled; 2, the esterified melt and a chain extender enter a melt mixing device together to be uniformly mixed and then enter a homogenizer, a chain extension homogenization reaction is performed in the homogenizer, and a first polyester melt is obtained; 3, the first polyester melt enters a pre-polymerization kettle to be subjected to a pre-polymerization reaction, and a second polyester melt is obtained; 4, the second polyester melt enters a polycondensation kettle to be subjected to a polymerization reaction, and a third polyester melt is obtained; 5, the third polyester melt enters a tackifying kettle to be subjected to tackifying reaction, and a fourth polyester melt is obtained; and 6, cooling the fourth polyester melt, and granulating to obtain polyester product slices.

Description

Technical field [0001] The present invention relates to the field of polyester, in particular to a method of continuous rapid production of polyester products and applications thereof. Background [0002] Chain expander is a class of substances that can react with functional groups on the linear main chain or branched chain of the polymer, so that the molecular chain of the polymer expands, so that the molecular weight of the polymer increases, usually a low molecular mass polyfunction containing hydroxyl or amino groups of alcohols, amine compounds, epoxy and isocyanates are also more and more widely used. Chain spreaders in the synthesis of polyester and adhesives have a very important role in improving the characteristics of polyester and adhesive viscosity, mechanical properties, etc., but because of the different production processes, chain spreaders are often accompanied by harmful side reactions in the preparation process, which is not conducive to the quality of the finis...

Claims

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Application Information

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IPC IPC(8): C08G63/78
CPCC08G63/78
Inventor 胡立楠叶秀丝郭东生刘晨
Owner 江苏睿安应用生物技术股份有限公司
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