Preparation method of furan resin

A technology of furan resin and lignin, which is applied in the field of resin production, can solve the problems of limited application range of furan resin, poor bonding strength and toughness, etc., achieve good curing effect, reduce brittleness, and increase product strength

Pending Publication Date: 2021-11-02
山东永创材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, although the furan resin provided by the prior art has a certain strength, its b

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In the embodiment of the present invention, a kind of preparation method of furan resin comprises the following steps:

[0031] (1) Preparation of raw materials: The weight ratio of the raw materials for the preparation of the furan resin is: 20 parts of lignin, 4 parts of maleic anhydride, 6 parts of xylitol, 15 parts of graphene, 15 parts of furfuryl alcohol, 4 parts of furfuryl ketone, 30 parts of solid formaldehyde, 0.5 parts of coupling agent, 4 parts of urea, 0.5 parts of metal salt, 2 parts of boric acid, 0.1 part of benzoic acid;

[0032] (2) Preparation of modified lignin: weigh lignin, maleic anhydride and xylitol respectively in proportion, put them in a mixer, heat up to 90°C, and stir at 90°C for 30 minutes to prepare modified lignin; The purity of the lignin is above 92%, and the lignin of coniferous species is used; the xylitol is extracted by corn cobs;

[0033] (3) Prepare graphene dispersant: mix graphene and furfuryl alcohol to obtain graphene disper...

Embodiment 2

[0040] In the embodiment of the present invention, a kind of preparation method of furan resin comprises the following steps:

[0041] (1) Preparation of raw materials: The weight ratio of the raw materials for the preparation of the furan resin is: 30 parts of lignin, 6 parts of maleic anhydride, 8 parts of xylitol, 25 parts of graphene, 25 parts of furfuryl alcohol, 6 parts of furfuryl ketone, 45 parts of solid formaldehyde, 0.75 parts of coupling agent, 6 parts of urea, 0.65 parts of metal salt, 3 parts of boric acid, 0.1 part of benzoic acid;

[0042] (2) Preparation of modified lignin: weigh lignin, maleic anhydride and xylitol respectively in proportion, put them in a mixer, heat up to 100°C, and stir at 100°C for 25 minutes to prepare modified lignin; The purity of the lignin is more than 92%, and the broad-leaved lignin is used; the xylitol is extracted by straw;

[0043] (3) Prepare graphene dispersant: mix graphene and furfuryl alcohol to obtain graphene dispersant;...

Embodiment 3

[0050] In the embodiment of the present invention, a kind of preparation method of furan resin comprises the following steps:

[0051](1) Prepare raw materials: The weight ratio of the raw materials for the preparation of the furan resin is: 40 parts of lignin, 7 parts of maleic anhydride, 10 parts of xylitol, 35 parts of graphene, 35 parts of furfuryl alcohol, 7 parts of furfuryl ketone, 55 parts of solid formaldehyde, 1.5 parts of coupling agent, 8 parts of urea, 0.75 parts of metal salt, 4 parts of boric acid, 0.25 parts of benzoic acid;

[0052] (2) Preparation of modified lignin: weigh lignin, maleic anhydride and xylitol respectively in proportion, put them in a mixer, raise the temperature to 105°C, and stir at 105°C for 20 minutes to prepare modified lignin; The purity of the lignin is above 92%, and the plant lignin is used; the xylitol is extracted from sugarcane;

[0053] (3) Prepare graphene dispersant: mix graphene and furfuryl alcohol to obtain graphene dispersa...

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Abstract

The invention discloses a preparation method of furan resin. The preparation method comprises the following steps: (1) preparing raw materials; (2) preparing modified lignin; (3) preparing a graphene dispersant; (4) putting solid formaldehyde and urea into a reaction kettle, and adding boric acid; (5) adding a graphene dispersing agent and furfuryl ketone, and carrying out a catalytic reaction; (6) adding a sodium hydroxide solution to adjust the pH value to 7-9, adding modified lignin, and reacting for 1 hour; (7) adding a coupling agent, and stirring; and (8) adding metal salt, and stirring to finally obtain a finished product. The solid formaldehyde and furfuryl ketone are adopted for reaction, formaldehyde generated in the generation process can be consumed, the free formaldehyde content of the product can be reduced to 0.09%, boric acid is added, the graphitization degree of furan resin is improved, the wear resistance and thermal shock resistance of the furan resin are improved, the brittleness of the furan resin is reduced, and the furan resin has good toughness and bonding strength.

Description

technical field [0001] The invention relates to the technical field of resin production, in particular to a preparation method of furan resin. Background technique [0002] Furan resin is a thermosetting resin with furfuryl alcohol and furfural as the main raw materials. Furan resin has the characteristics of high strength at room temperature, good toughness, and low toxicity, and the raw materials are easily available and cheap. It is one of the most widely used resins. Furan resin is by far the most widely used polycondensation resin in foundry production, and the annual consumption has reached more than 500,000 tons. Furan resin refers to the general term for resins produced with furfuryl alcohol having a furan ring as a raw material. It solidifies into an insoluble and infusible solid in an acidic medium. The main raw materials for producing furan resin are furfuryl alcohol, formaldehyde and urea. Because furan resin It has outstanding excellent characteristics, but wh...

Claims

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Application Information

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IPC IPC(8): C08G16/04C08G16/02C08K3/38C08K3/04
CPCC08G16/04C08G16/0262C08G16/0293C08G16/0225C08K3/38C08K3/042
Inventor 孙志勇潘月宝孙之兰刘萌孙笃新罗啸侯学臻郑金鹏
Owner 山东永创材料科技有限公司
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