Synthetic adhesive using papermaking black liquor as raw material and its production method

A papermaking black liquor and adhesive technology, which is applied in the field of wood board adhesives to achieve the effects of reducing costs, protecting the environment and reducing waste discharge

Inactive Publication Date: 2017-05-10
广西星岛科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, one of the raw materials for the production of urea-formaldehyde resin or modified urea-formaldehyde resin is formaldehyde. Therefore, the wood-based panels using urea-formaldehyde resin or modified urea-formaldehyde resin as adhesives will inevitably release formaldehyde.

Method used

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  • Synthetic adhesive using papermaking black liquor as raw material and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The adhesive is synthesized by using papermaking black liquor as a raw material, and consists of the following raw materials in parts by weight:

[0033] 50 parts of papermaking black liquor;

[0034] 100 parts of phenolic resin;

[0035] 1 part of coupling agent;

[0036] 1 part of auxiliary agent;

[0037] 1 part of treatment agent.

[0038] The papermaking black liquor is bagasse papermaking black liquor; the solid weight content of the papermaking black liquor is 25%.

[0039] The preparation method of the phenolic resin is as follows: according to the molar ratio of formaldehyde and phenol as 1.1:1, under the condition of NaOH basic catalyst, the phenolic resin prepolymer with a molecular weight of 1400 can be generated through heating and polymerization.

[0040] The coupling agent is γ-mercaptopropyltriethoxysilane.

[0041] The auxiliary agent is a leveling agent polyether modified polydimethylsiloxane.

[0042] The treatment agent is ozone.

[0043] Pape...

Embodiment 2

[0048] The adhesive is synthesized by using papermaking black liquor as a raw material, and consists of the following raw materials in parts by weight:

[0049] 150 parts of papermaking black liquor;

[0050] 150 parts of phenolic resin;

[0051] 4 parts of coupling agent;

[0052] 5 parts of auxiliary agent;

[0053] 3 parts of treatment agent.

[0054] The papermaking black liquor is a mixture of concentrated lignin separated from bagasse papermaking black liquor by acid precipitation and acid precipitation solution according to the patent application (CN 104153232A) of Guangxi Xingdao Technology Development Co., Ltd.; The solid weight content of the papermaking black liquor is 30%.

[0055] The preparation method of the phenolic resin is as follows: according to the molar ratio of formaldehyde and phenol as 3:1, under the condition of NaOH basic catalyst, the phenolic resin prepolymer with a molecular weight of 1600 can be generated by heating and polymerizing.

[0056...

Embodiment 3

[0064] The adhesive is synthesized by using papermaking black liquor as a raw material, and consists of the following raw materials in parts by weight:

[0065] 300 parts of papermaking black liquor;

[0066] 250 parts of phenolic resin;

[0067] 7 parts of coupling agent;

[0068] 8 parts of auxiliary agent;

[0069] Treatment agent 4 parts.

[0070] The papermaking black liquor is bagasse papermaking black liquor; the solid weight content of the papermaking black liquor is 35%.

[0071] The preparation method of the phenolic resin is as follows: according to the molar ratio of formaldehyde and phenol as 4:1, under the condition of NaOH basic catalyst, the phenolic resin prepolymer with a molecular weight of 1800 can be produced by heating and polymerizing.

[0072] The coupling agent is γ-mercaptopropyltriethoxysilane.

[0073] The auxiliary agent is N-methylpyrrolidone solution of anti-settling agent modified polyurea.

[0074] The treatment agent is sulfonated cobalt...

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PUM

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Abstract

The invention discloses an adhesive synthesized by using papermaking black liquor as a raw material and a production method thereof. The adhesive is composed of the following raw materials in parts by weight: 50-500 parts of papermaking black liquor, 100-300 parts of phenolic resin, 1-10 parts of a coupling agent, 1-10 parts of an assistant and 1-5 parts of a processing agent. The production method includes the following steps: (1) putting the papermaking black liquor into a reaction still, adding a chlorhydric acid or sulphuric acid aqueous solution while stirring to adjust the pH of the solution to be 4-8, then heating, and when the temperature becomes stable at 60-90 DEG C, reacting for 10 minute to 2 hours; (2) after the step (1) is ended, adding phenolic resin, the coupling agent and the assistant, and then adding a NaOH aqueous solution until phenolic resin, the coupling agent and the assistant are dissolved, adjusting the pH value of the solution to be 11-14, and carrying out a polymerization reaction at 90-110 DEG C for 20 minutes to 3 hours; (3) after the step (2) is ended, adding the processing agent, stirring and reacting for 10-20 minutes. According to the invention, the papermaking black liquor is used as the main raw material to react with phenolic resin, and is combined with the coupling agent and the assistant, so that the gluing property of the adhesive is remarkably improved, and the papermaking black liquor is turned into treasure from waste.

Description

technical field [0001] The invention relates to the field of wood board adhesives, in particular to a wood board adhesive synthesized by using papermaking black liquor as a raw material and a production method thereof. Background technique [0002] As a treatment method for papermaking black liquor, the waste liquor is generally concentrated and burned as fuel, and then the cooking medicine is extracted from the burned ash for secondary use. In recent years, some factories have dried the papermaking black liquor as a lignin product and combined it with carbon, metal, fertilizer and other powders to make cheap adhesives. As for the lignin products made from papermaking black liquor, the purity of lignin itself is usually only 20-50%, and it contains a lot of sugars, sugar decomposition products, organic acid salts and inorganic acid acid salts. However, since sugars and sugar decomposition products are sticky, they are effective as inexpensive binders even if the lignin cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J161/14C09J11/06C09J11/08C08G8/28
Inventor 李晓李保国
Owner 广西星岛科技发展有限公司
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