Biological oil-starch-glyoxal resin adhesive for artificial board and preparation method of biological oil-starch-glyoxal resin adhesive

A technology of glyoxal resin and adhesive, applied in starch-derived adhesives, adhesive types and other directions, can solve the problems of high dependence on fossil resources, poor environmental protection and degradable performance, etc., to reduce costs and realize rational utilization , the effect of good bonding performance

Inactive Publication Date: 2012-08-15
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, to propose a bio-oil-starch-glyoxal resin adhesive for wood-based panels and a preparation method thereof, to solve the problem that the raw materials of the adhesive for wood-based panels are highly dependent on fossil resources , poor environmental protection and degradable performance

Method used

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  • Biological oil-starch-glyoxal resin adhesive for artificial board and preparation method of biological oil-starch-glyoxal resin adhesive
  • Biological oil-starch-glyoxal resin adhesive for artificial board and preparation method of biological oil-starch-glyoxal resin adhesive

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preparation example Construction

[0025] The preparation method of the bio-oil-starch-glyoxal resin adhesive that the present invention proposes comprises the following steps:

[0026] Step 1: Add 50 parts of water to 30~50 parts of starch that has been mechanically activated for 30~110 minutes to prepare a 35~50% starch emulsion, heat it up to 55~65°C and keep it warm;

[0027] Step 2: Add 0.8~1.0 parts of oxidizing agent to the starch emulsion, adjust the pH to 3-4 with 3% hydrochloric acid, acidolysis and oxidation at a temperature of 55~65°C for 40~60min, and obtain the acidolysis oxidized starch emulsion;

[0028] Step 3: Add 20~40 parts of bio-oil to the acid-decomposed oxidized starch emulsion, adjust the pH to 4~6 with 8% sodium hydroxide solution, and react at 55~65°C for 50~70 minutes; then add 10~ 20 parts of glyoxal, control the pH between 4~5, and continue the reaction at 55~65°C for 60~80min;

[0029] Step 4: Add 8-12 parts of oxalic acid in batches within 80-100 minutes, that is, alternately ad...

Embodiment 1

[0033] Step 1: Add 50 parts of water to 30 parts of cornstarch that has been mechanically activated for 30 minutes to prepare a 37.5% starch emulsion, heat it up to 55°C and keep it warm;

[0034] The second step: add 0.8 parts of ammonium persulfate oxidant to the starch emulsion, adjust the pH to 3-4 with 3% hydrochloric acid, and acid-hydrolyze and oxidize at 55°C for 40 minutes to obtain acid-hydrolyzed oxidized starch emulsion;

[0035] Step 3: Add 20 parts of bio-oil to the acid-decomposed oxidized starch emulsion, adjust the pH to 4 with 8% sodium hydroxide solution, and react at 55°C for 50 minutes; then add 10 parts of glyoxal to control the pH at 4 ~5, continue to react at 55°C for 60 minutes;

[0036] Step 4: Add 8 parts of oxalic acid in batches within 80 minutes, that is, add oxalic acid and lye alternately every 20 minutes, that is, add 8% sodium hydroxide lye to make the pH rise to 6, and then add ethanedioic acid The diacid lowers the pH to 4, and lye and oxal...

Embodiment 2

[0039] Step 1: Add 50 parts of water to 40 parts of cassava starch mechanically activated for 50 minutes to prepare a 44.4% starch emulsion, heat it up to 60°C and keep it warm;

[0040] The second step: add 0.9 parts of potassium persulfate oxidant to the starch emulsion, adjust the pH to 3-4 with 3% hydrochloric acid, and acid-hydrolyze and oxidize at 60°C for 50 minutes to obtain acid-hydrolyzed oxidized starch emulsion;

[0041] Step 3: Add 30 parts of bio-oil to the acid-decomposed oxidized starch emulsion, adjust the pH to 5 with 8% sodium hydroxide solution, and react at 60°C for 60 minutes; then add 15 parts of glyoxal to control the pH at 4~ 5, continue to react at 60°C for 65 minutes;

[0042] Step 4: Add 10 parts of oxalic acid in batches within 90 minutes, that is, add oxalic acid and lye alternately every 20 minutes, that is, add 8% sodium hydroxide lye to make the pH rise to 6, and then add ethanedioic acid The diacid lowers the pH to 4, and lye and oxalic acid ...

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Abstract

The invention relates to a biological oil-starch-glyoxal resin adhesive for an artificial board and a preparation method of the biological oil-starch-glyoxal resin adhesive, belonging to the technical field of an adhesive of the artificial board. The adhesive is prepared by adding an additive consisting of curing agent and filler into a main agent prepared from the biological oil, mechanical activation starch, the glyoxal, oxalic acid, oxidizing agent and water. The method comprises the following steps of: preparing starch emulsion by the mechanical activation starch and water, heating and then keeping the temperature; adjusting pH to obtain acidolysis oxidized starch emulsion; adding the biological oil, adjusting pH and then adding the glyoxal; alternatively adding the oxalic acid and alkali liquor in batches until all the oxalic acid is filled, reducing the temperature and discharging to obtain the main agent; adding the curing agent and the filler into the main agent to obtain the biological oil-starch-glyoxal resin adhesive. The biological oil-starch-glyoxal resin adhesive solves the problems that the current adhesive material used by the artificial board highly depends on petrochemical resources, the environmental friendliness and the degradable performance are poor and the like, and has the characteristics of low cost, high performance and environmental friendliness.

Description

technical field [0001] The invention belongs to the technical field of wood-based panel adhesives, and relates to a method for preparing a formaldehyde-free bio-oil-starch-glyoxal resin adhesive for wood-based panels, in particular to a low-cost, high-performance, green and environmentally friendly starch-based adhesive for wood-based panels method of preparation. technical background [0002] The current adhesives used in the wood-based panel industry are mainly "trialdehyde" adhesives (urea-formaldehyde resin adhesives, phenolic resin adhesives, melamine-formaldehyde co-condensation resin adhesives), and the main raw materials of "trialdehyde" adhesives are heavily dependent on non-renewable fossil resources; During the production of "trialdehyde" adhesives, the manufacture of wood-based panels and their preparation and use, toxic and harmful substances such as formaldehyde and phenol will be released, causing pollution in production workshops and indoor spaces, and endang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J103/10C09J103/04C08B31/18C08B31/00
Inventor 常建民张继宗张琪伊江平姚思旭高雪景苟进胜任学勇吴佳欢黄宇翔
Owner BEIJING FORESTRY UNIVERSITY
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