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Soybean meal-based adhesive for wood and preparation method thereof

A technology of adhesives and soybean meal, which is applied in the field of soybean meal-based adhesives for wood and its preparation, can solve the problems of prolonged curing time, increased difficulty of production process, and increased production cost, so as to increase the water-resistant handover performance, increase the added value of products, and save The effect of production costs

Inactive Publication Date: 2014-12-03
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example: 1) Although the use of low molar ratio modified urea-formaldehyde resin adhesives can effectively reduce the formaldehyde emission of wood-based panel products, the bonding strength of the products is often reduced, which cannot meet the requirements of use; and it can lead to prolonged curing time and reduced production efficiency; 2) Adding formaldehyde scavenger to urea-formaldehyde resin adhesives for wood-based panels can effectively reduce the release of free formaldehyde from wood-based panels, but it often reduces the bonding strength of wood-based panels at the same time; at the same time, the price of general formaldehyde scavenger is often much higher than that of urea-formaldehyde resin adhesives. Adding improves product cost and reduces product competitiveness; 3) Carry out post-processing to wood-based panels, as the invention patent application with publication number CN1526528 discloses a method for preparing E1 / EO grade environment-friendly wood-based panels using ammonia vacuum method. Manufacturing process; the utility model patent with publication number CN2394770 discloses a treatment device for reducing formaldehyde emission from wood-based panels. These post-processing methods not only make the manufacturing process of wood-based panels complicated, but also require huge investment in post-processing equipment and significantly increase production costs. ; 4) The use of other environmentally friendly adhesives, such as isocyanate adhesives, has led to a substantial increase in the production cost of wood-based panels and increased difficulty in the production process, which is difficult for enterprises and users to accept; Unglue
In summary, although the above measures can effectively reduce the release of free formaldehyde from wood-based panels, they cannot completely solve the problem of formaldehyde release, or cannot be popularized due to reasons such as high production costs.
[0005] In addition, the currently widely used wood-based panel adhesives also have the problem of dependence on fossil resources of raw materials, which do not meet the requirements of sustainable development

Method used

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  • Soybean meal-based adhesive for wood and preparation method thereof
  • Soybean meal-based adhesive for wood and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A soybean meal-based adhesive for wood, prepared from the following raw materials by weight:

[0028] Demineralized water 68kg

[0029] Sodium dodecylbenzenesulfonate 1 kg

[0030] Defatted Soy Protein Powder 26kg

[0031] Cross-linking enhancer 3 kg

[0032] Sodium Benzoate 2kg

[0033] A preparation method of the above-mentioned soybean meal-based adhesive for wood, comprising the following steps:

[0034] 1) Weigh each raw material according to the above weight ratio;

[0035] 2) Add all the demineralized water, soy protein powder and sodium dodecylbenzenesulfonate into the reaction kettle equipped with agitator, thermometer and condensing device, and stir evenly;

[0036] 3) Heat in a water bath to 40-45°C and keep warm for 3 hours;

[0037] 4) The temperature of the reactant is lowered to 30°C to obtain a uniform soy protein mucus;

[0038] 5) Add the enhancer to the obtained soybean protein mucilage, mix well, and then add sodium benzoate to make the soybea...

Embodiment 2

[0043] A soybean meal-based adhesive for wood, prepared from the following raw materials by weight:

[0044] Demineralized water 64 kg

[0045] Sodium dodecylbenzenesulfonate 2 kg

[0046] Defatted Soy Protein Powder 29 kg

[0047] Enhancer 5kg

[0048] Sodium Benzoate 4kg

[0049] A preparation method of the above-mentioned soybean meal-based adhesive for wood, comprising the following steps:

[0050] 1) Weigh each raw material according to the above weight ratio;

[0051] 2) Add all the demineralized water, soy protein powder and sodium dodecylbenzenesulfonate into the reaction kettle equipped with agitator, thermometer and condensing device, and stir evenly;

[0052] 3) Heat in a water bath to 40-45°C and react for 6 hours;

[0053] 4) The temperature of the reactant is lowered to 30°C to obtain a uniform soy protein mucus;

[0054] 5) Add the enhancer to the obtained soybean protein mucilage, mix well, and then add sodium benzoate to make the soybean protein adhesiv...

Embodiment 3

[0059] A soybean meal-based adhesive for wood, prepared from the following raw materials by weight:

[0060] Demineralized water 62 kg

[0061] Sodium dodecylbenzenesulfonate 2 kg

[0062] Defatted Soy Protein Powder 29 kg

[0063] Enhancer 7kg

[0064] Sodium Benzoate 3kg

[0065] A preparation method of the above-mentioned soybean meal-based adhesive for wood, comprising the following steps:

[0066] 1) Weigh each raw material according to the above weight ratio;

[0067] 2) Add all the demineralized water and soybean protein powder into the reaction kettle equipped with agitator, thermometer and condensing device, and stir evenly;

[0068] 3) Heat in a water bath to 65-70°C and react for 5 hours;

[0069] 4) The temperature of the reactant is lowered to 30°C to obtain a uniform soy protein mucus;

[0070] 5) Add the enhancer to the obtained soybean protein mucilage, mix well, and then add sodium benzoate to make the soybean protein adhesive.

[0071] The cross-linki...

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Abstract

The invention discloses a soybean meal-based adhesive for wood and a preparation method thereof. The soybean meal-based adhesive is prepared from the following materials in parts by weight: 60-70 parts of dispersing medium, 20-35 parts of defatted soybean protein powder, 0.5-2 parts of sodium dodecyl benzene sulfonate, 1-8 parts of cross-linking reinforcing agent and 1-8 parts of sodium benzoate. The preparation method comprises the following steps: adding the defatted soybean protein powder and the sodium dodecyl benzene sulfonate to a dispersing medium; uniformly stirring, and keeping temperature at 60-80 DEG C for 3-6 hours; and then reducing the temperature of an obtained mixture to 25-35 DEG C, adding the cross-linking reinforcing agent and the sodium benzoate, and uniformly stirring. The preparation method disclosed by the invention has the advantages of simple process and convenience for operation; and the produced adhesive is free of formaldehyde, and main raw materials are derived from renewable substances, and thus safety and environmental friendliness are achieved.

Description

technical field [0001] The invention relates to an adhesive, in particular to a soybean meal-based adhesive for wood and a preparation method thereof, belonging to the field of adhesives. Background technique [0002] With the improvement of people's living standards and the continuous and stable development of construction, decoration, packaging and other industries, the output of wood-based panels in my country has grown rapidly. In 2013, the total output of wood-based panels in my country was 272 million m 3 , accounting for about 50% of the world's total production. Among them, the particle board is 13.58 million m 3 , a year-on-year increase of 5.3%; fiberboard 59.83 million m 3 , a year-on-year increase of 4.0%; plywood 157 million m 3 , an increase of 10.5% year-on-year. The total output of wood-based panels, plywood, furniture, and wood flooring has ranked first in the world for many years in a row. [0003] The adhesives commonly used in the production of wood...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00C09J133/26C09J11/06C08J3/24C08L33/26C08K5/07
Inventor 罗晶高强李建章张世锋周文瑞张伟陈惠
Owner BEIJING FORESTRY UNIVERSITY
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