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Myrica tannin extract modified phenolic resin and its preparation method and application

A technology of bayberry tannin extract and phenolic resin, which is applied in the directions of adhesives, aldehyde/ketone condensation polymer adhesives, adhesive types, etc. The effect of production, alleviation of environmental pollution problems, and simple and mature preparation process

Active Publication Date: 2020-06-05
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] So far, only the Chinese patent literature with publication number CN 102093770 discloses the use of bayberry extract to prepare marine antifouling agents, and the Chinese patent literature with publication number CN 1422928 discloses the use of bayberry extract as an additive for thermosetting wood adhesives , there is no report about the application of bayberry extract in the modified preparation of extract-phenol-formaldehyde resin adhesive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A modified phenolic resin of bayberry extract of the present invention is mainly prepared by reacting phenol, formaldehyde solution, bayberry extract and degradation agent, the mass ratio of phenol and formaldehyde solution is 1: 1.34, the mass ratio of phenol and bayberry extract is 1:0.43, and the mass ratio of bayberry extract to degradation agent is 1:0.3.

[0041] In this example, the formaldehyde solution is commercially available, with a mass fraction of 37%-40%, chemically pure, and the solvent is water.

[0042] In this embodiment, the tannin content in bayberry extract is not less than 60%, and the tannin content in commercially available bayberry extract is 63%-77%.

[0043] In this embodiment, the degradation agent is compounded by sodium sulfite and sodium bisulfite in a mass ratio of 3:1.

[0044] A kind of preparation method of the bayberry extract modified phenolic resin of above-mentioned present embodiment, comprises the following steps:

[0045] Mix...

Embodiment 2

[0050] A kind of modified phenolic resin of bayberry extract of the present invention is mainly prepared by reacting phenol, formaldehyde solution, bayberry extract and degradation agent, the mass ratio of phenol and formaldehyde solution is 1: 1.6, the mass ratio of phenol and bayberry extract is 1:0.43, and the mass ratio of bayberry extract to degradation agent is 1:0.3.

[0051] In this embodiment, the mass concentration of the formaldehyde solution can be 37%-40%.

[0052] In this embodiment, the content of tannin in bayberry extract can be no less than 60%, usually in the range of 63% to 77%.

[0053] A kind of preparation method of the bayberry extract modified phenolic resin of above-mentioned present embodiment, comprises the following steps:

[0054] After mixing 56g of formaldehyde solution and 35g of phenol, adjust the pH=9.89 with solid NaOH, react at 90°C for 1.5h, then cool down to 70°C, add 15g of bayberry extract, 4.5g of sodium sulfite and sodium bisulfite a...

Embodiment 3

[0059] A kind of modified phenolic resin of bayberry extract of the present invention is mainly prepared by reacting phenol, formaldehyde solution, bayberry extract and degradation agent, the mass ratio of phenol and formaldehyde solution is 1: 1.6, the mass ratio of phenol and bayberry extract is 1:0.43, and the mass ratio of bayberry extract to degradation agent is 1:0.3.

[0060] In this embodiment, the mass concentration of the formaldehyde solution can be 37%-40%.

[0061] In this embodiment, the content of tannin in bayberry extract can be no less than 60%, usually in the range of 63% to 77%.

[0062] A kind of preparation method of the bayberry extract modified phenolic resin of above-mentioned present embodiment, comprises the following steps:

[0063] Mix 56g of formaldehyde solution and 35g of phenol, adjust the pH=9.89 with solid NaOH, react at 90°C for 1.0h, then cool down to 70°C, add 15g of bayberry extract, 4.5g of sodium sulfite and sodium bisulfite according ...

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Abstract

The invention discloses a tanning agent myrica modified phenolic resin, and a preparation method and an application thereof. The tanning agent myrica modified phenolic resin is mainly prepared througha reaction of phenol, a formaldehyde solution, tanning agent myrica and a degrading agent, a mass ratio of the phenol to the formaldehyde solution is 1:(1.2-3.0), a mass ratio of the phenol to the tanning agent myrica is 1:(0.2-1.5), and a mass ratio of the tanning agent myrica to the degrading agent is 1:(0.1-0.4). The preparation method comprises: a primary reaction of the phenol and the formaldehyde solution, and a secondary reaction after the addition of the tanning agent myrica and the degrading agent. The tanning agent myrica modified phenolic resin is mixed with a curing agent and a filler to prepare a tanning agent myrica modified phenolic resin adhesive. The tanning agent myrica modified phenolic resin and its adhesive can reduce the use amount of the phenol, shorten the reactiontime, reduce the cost, shorten the curing time and prolong the working life of a glue solution on the premise of meeting national standards of Structural Glued Laminated Timber, and also have the advantages of low toxicity and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of application of bayberry extract, and in particular relates to a modified phenolic resin of bayberry extract and a preparation method and application thereof. Background technique [0002] Tannin extract is a product obtained by extracting and concentrating tannin-rich plant material. The tannin in the extract has a polyphenolic structure, which can participate in the reaction in the synthesis of phenolic resin. The reaction process is easy to control. It can replace phenol to reduce the cost of phenolic resin raw materials and improve the resin bonding performance. It provides a high value-added approach for the utilization of forest waste in my country, and at the same time reduces the dependence of phenolic resin raw materials on petrochemical products. Tannin extract is a green and renewable resource. With the depletion of non-renewable resources such as petroleum, the development of forest product in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/34C09J161/14C09J11/08
CPCC08G8/34C09J11/08C09J161/14C08L3/02
Inventor 吴志平覃族谢力生周先雁李贤军贺丹
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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