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Preparation method of special multi-functional polyester resin

A polyester resin, multi-functional technology, applied in the field of preparation of special multi-functional polyester resin, can solve the problems of complex production process and high production cost

Inactive Publication Date: 2015-12-09
上海深容化学技术有限公司
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Problems solved by technology

[0002] Most of the existing preparation methods of modified polyester resins are to use dibasic arylic acid and dibasic alcohol to react to generate polyester, and then add a third monomer for modification. The defects of this process are mainly that the production process is complicated and the production cost high

Method used

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  • Preparation method of special multi-functional polyester resin
  • Preparation method of special multi-functional polyester resin
  • Preparation method of special multi-functional polyester resin

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preparation example

[0014] The principle is to use a reversible esterification reaction to react polyester or modified polyester with polyether polyols of different molecular weights, and carry out molecular rearrangement. The rearrangement polycondensation under vacuum is directly prepared into a multifunctional resin. Modification needs to add self-made intermediates, specifically including the following reaction steps:

[0015] For the preparation of intermediates, add 150g of isophthalic acid, 168 grams of ethylene glycol, and 0.01㎎ of butyl titanate into a 500ml round-bottomed flask, and react at 200°C for 1 hour to form monomer bishydroxyethyl isophthalate ester.

[0016] Next, use 7g of self-made monomer bishydroxyethyl isophthalate, polyester chips (PET) 12g, polyethylene glycol (PEG) 150060g, add a titanium catalyst and react for 2-3 hours under anaerobic conditions at 270 degrees In the later stage, the EG generated by the reaction is evaporated under the vacuum condition gradually inc...

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Abstract

The invention belongs to a new chemical process, relates to a novel synthetic method of a traditional material, and particularly relates to a novel preparation method of a special multi-functional polyester resin; the novel preparation method is characterized in that a reversible esterification reaction is applied, polyester or modified polyester undergoes a reaction together with polyether polyols with different molecular weights, molecular rearrangement is carried out, rearrangement condensation polymerization is carried out under the action of vacuum to prepare the multi-functional resin directly, and a self-made intermediate can be added according to requirements of modification. Compared with a traditional process, the novel preparation method is simple in process, lowers costs, and has good effects.

Description

[technical field] [0001] The patent of the present invention belongs to a new chemical process and is a new synthesis method of traditional materials, specifically a new preparation method of a special multifunctional polyester resin. [Background technique] [0002] Most of the existing preparation methods of modified polyester resins are to use dibasic arylic acid and dibasic alcohol to react to generate polyester, and then add a third monomer for modification. The defects of this process are mainly that the production process is complicated and the production cost high. [Content of the invention] [0003] The purpose of the present invention is to overcome the defects and difficulties in the prior art, adopt a new synthetic method to obtain special multifunctional polyester resin, and greatly improve the efficiency. [0004] In order to achieve the above object, a preparation method of a special multifunctional polyester resin is designed, which is characterized in that...

Claims

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Application Information

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IPC IPC(8): C08G63/672C08G63/688C08G63/85
Inventor 尚俊杰
Owner 上海深容化学技术有限公司
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