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Preparation method of dibasic acid chain extension modified epoxy resin

A technology of epoxy resin and dibasic acid, which is applied in the field of preparation of dibasic acid chain extension modified epoxy resin, which can solve the problem of poor adhesion of matrix resin, unstable storage of emulsion, and poor clustering of tows, etc. problems, to achieve the effect of improving initial adhesion, improving clustering, and improving emulsion stability

Active Publication Date: 2020-08-11
WEIHAI TUOZHAN FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the existing technical deficiencies, to provide a preparation method of dibasic acid chain extension modified epoxy resin, which solves the problem of complex emulsification process of existing carbon fiber sizing agent, unstable storage of emulsion, and silkiness after sizing. Problems such as poor bundling, hard tow, weak adhesion with matrix resin, etc.

Method used

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  • Preparation method of dibasic acid chain extension modified epoxy resin
  • Preparation method of dibasic acid chain extension modified epoxy resin
  • Preparation method of dibasic acid chain extension modified epoxy resin

Examples

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Embodiment 1

[0036] Embodiment 1, a kind of preparation method of dibasic acid chain extension modified epoxy resin, its steps are as follows:

[0037] 1. Add 200 parts by weight of epoxy resin E51 to the reactor, then add 70 parts by weight of polyethylene glycol PEG-1000, heat and stir at 50°C to make it evenly dispersed, and then add an appropriate amount of compound catalyst to raise Temperature to 120°C, react for 2 hours, and the reaction product is polyethylene glycol modified epoxy resin.

[0038] 2. Add an appropriate amount of mixed acid compounded by lauric acid and adipic acid to the product, wherein the molar ratio of lauric acid and adipic acid is 1:2, then add an appropriate amount of compound accelerator, and react at 110°C for 4 hours. The final product is dibasic acid chain extension modified epoxy resin.

Embodiment 2

[0039] Embodiment 2, a kind of preparation method of dibasic acid chain extension modified epoxy resin, its steps are as follows:

[0040] 1. Add 220 parts by weight of epoxy resin E44 to the reactor, then add 60 parts by weight of polyethylene glycol PEG-1500, heat and stir at 50°C to make it evenly dispersed, and then add an appropriate amount of compound catalyst to raise Temperature to 120°C, react for 2 hours, and the reaction product is polyethylene glycol modified epoxy resin.

[0041] 2. Add an appropriate amount of mixed acid compounded with oleic acid and sebacic acid to the product, wherein the molar ratio of oleic acid and sebacic acid is 1:2, then add an appropriate amount of compound accelerator, and react 4 at 110°C Hours, the final product is dibasic acid chain extension modified epoxy resin.

Embodiment 3

[0042] Embodiment 3, a kind of preparation method of dibasic acid chain extension modified epoxy resin, its steps are as follows:

[0043] 1. Add 230 parts by weight of epoxy resin E51 to the reactor, then add 55 parts by weight of polyethylene glycol PEG-1000, heat and stir at 50°C to make it evenly dispersed, and then add an appropriate amount of compound catalyst to raise Temperature to 120°C, react for 2 hours, and the reaction product is polyethylene glycol modified epoxy resin.

[0044] Two, add the compounded mixed acid of appropriate amount of stearic acid and maleic acid in the product again, wherein the mol ratio of stearic acid and maleic acid is 1:1, then add appropriate polymerization inhibitor and compound accelerator, React at 130°C for 3 hours, and the final product obtained is dibasic acid chain extension modified epoxy resin.

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Abstract

The invention relates to the field of high molecular materials, and specifically relates to a preparation method of binary acid chain extension modified epoxy resin. The preparation method comprises the following steps: adding epoxy resin and dihydric alcohol into a reactor, enabling the molar ratio of epoxy resin to poly dihydric alcohol to be (2: 1) to (10: 1), heating and stirring, so that themixture is dispersed uniformly, using a hydrochloric acid-acetone method to measure an initial epoxy number, then adding a catalyst, raising the temperature until 110 to 175 DEG C, reacting for 2 to 3h, using the hydrochloric acid-acetone method to measure an epoxy number remaining after the reaction to reach an expected epoxy number, then adding mixed acid compounded with monobasic acid and binary acid into the product, raising the temperature, stirring and mixing uniformly, enabling the molar ratio of monobasic acid to binary acid is (1: 1) to (1: 5), then adding an accelerant, reacting for3 to 5 h at the temperature of 110 to 150 DEG C, and finally obtaining the product being binary acid chain extension modified epoxy resin. The preparation method solves the problem that an existing carbon fiber sizing agent is complex in emulsification technology, unstable in emulsion storage, low in strand bundling after sizing, hardened in strands, low in adhesiveness with matrix resin and thelike.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a preparation method of dibasic acid chain extension modified epoxy resin. Background technique [0002] As we all know, in the process of making composite materials, carbon fiber must undergo sizing treatment. The sizing agent acts as a transition layer between carbon fiber and matrix resin, so two phase interfaces will be produced, one side is combined with carbon fiber, and the other is One side is bonded to the base resin. The role of the sizing agent is divided into two aspects: on the one hand, the sizing agent can improve the clustering, flexibility, and wear resistance of carbon fibers, and improve the processability during processing; on the other hand, it can well connect the matrix resin, Only when the carbon fiber reinforced composite material is integrated and has good compatibility with the matrix resin can the excellent performance of carbon fiber be fully utilize...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/62C08G59/42
CPCC08G59/4207C08G59/62
Inventor 刘朝周建张雪辉
Owner WEIHAI TUOZHAN FIBER
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