Adhesive for artificial boards, and preparation method and application thereof

A technology for adhesives and wood-based panels, which is applied in the preparation of adhesives, animal glue or gelatin, and the types of adhesives, can solve the problems of increased production costs, increased product costs, and reduced bonding strength, saving production costs and meeting water resistance. Requirement to ensure the effect of bonding strength

Active Publication Date: 2014-04-23
XUZHOU ANLIAN WOOD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these technologies have many disadvantages
For example: 1) Although the use of a low molar ratio modified urea-formaldehyde resin adhesive can effectively reduce the formaldehyde emission of wood-based panel products, the bonding strength of the product is often reduced, which cannot meet the requirements of use; and the curing time is prolonged and the production efficiency is reduced; 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 also reduces the bonding strength of wood-based panels; at the same time, the price of general formaldehyde scavenger is often much higher than that of urea-formaldehyde resin adhesives. , its addition increases product cost and reduces product competitiveness; 3) Carry out post-processing to wood-based panels, such as the invention patent application with publication number CN1526528 (public date: September 8, 2004) discloses a method using The manufacturing process of E1/EO grade environment-friendly wood-based panels prepared by ammonia vacuum method; the utility model patent w

Method used

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  • Adhesive for artificial boards, and preparation method and application thereof
  • Adhesive for artificial boards, and preparation method and application thereof
  • Adhesive for artificial boards, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1) Prepare materials according to the following weight:

[0054]

[0055] 2) Add sodium carbonate and defatted soybean protein powder into demineralized water in a reaction kettle equipped with a stirrer, thermometer and condensing device, and stir evenly;

[0056] 3) Heat the obtained mixture of sodium carbonate, defatted soybean protein powder and demineralized water to 45-47°C and keep it warm for 3 hours;

[0057] 4) Cool down the mixture obtained in the previous step to 30°C to obtain a uniform soy protein mucus;

[0058] 5) Add tannin-glyoxal resin to the soy protein mucilage obtained in the previous step, and stir evenly to make a soy protein adhesive for wood-based panels.

[0059] The performance and quality indicators of the obtained adhesive are shown in Table 1.

Embodiment 2

[0061] 1) Prepare materials according to the following weight:

[0062]

[0063] 2) Add sodium carbonate and defatted soybean protein powder into demineralized water in a reaction kettle equipped with a stirrer, thermometer and condensing device, and stir evenly;

[0064] 3) Heat the obtained mixture of sodium carbonate, defatted soybean protein powder and demineralized water to 4042°C and keep it warm for 6 hours;

[0065] 4) Cool down the mixture obtained in the previous step to 30°C to obtain a uniform soy protein mucus;

[0066] 5) Add tannin-glyoxal resin to the soy protein mucilage obtained in the previous step, and stir evenly to make a soy protein adhesive for wood-based panels.

[0067] The performance and quality indicators of the obtained adhesive are shown in Table 1.

Embodiment 3

[0069] 1) Prepare materials according to the following weight:

[0070]

[0071] 2) Add sodium carbonate and defatted soybean protein powder into demineralized water in a reaction kettle equipped with a stirrer, thermometer and condensing device, and stir evenly;

[0072] 3) Heat the obtained mixture of sodium carbonate, defatted soybean protein powder and demineralized water to 68-70°C and keep it warm for 5 hours;

[0073] 4) Cool down the mixture obtained in the previous step to 30°C to obtain a uniform soy protein mucus;

[0074] 5) Add tannin-glyoxal resin to the soy protein mucilage obtained in the previous step, and stir evenly to make a soy protein adhesive for wood-based panels.

[0075] The performance and quality indicators of the obtained adhesive are shown in Table 1.

[0076] In Table 1, the unit "%" of solid content and free formaldehyde content is mass percentage.

[0077] Table 1: Performance and quality indicators of adhesives

[0078]

[0079] It c...

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Abstract

The invention relates to an adhesive for artificial boards, and a preparation method and application thereof. The adhesive for artificial boards is prepared from a dispersion medium, a protein substance, an alkaline compound and a crosslinking reinforcer, wherein the crosslinking reinforcer is a tannin-glyoxal resin. The adhesive for artificial boards is free of formaldehyde, is mainly prepared from renewable substances, and thus, is an environment-friendly adhesive for artificial boards; the adhesive provided by the invention thoroughly solves the problem of formaldehyde pollution when in use, and ensures water resistance, adhesion strength and other practical properties of the adhesive; compared with the prior art, the components have favorable synergetic effects, so that the effect is enhanced; the preparation method is simple, does not need very long curing time, is convenient to operate and has high production efficiency; and generally, the method comprehensively utilizes the resources, saves the production cost, conforms to the principles of environmental protection and sustainable development, and has favorable application prospects.

Description

technical field [0001] The invention relates to the field of chemical materials, in particular to an adhesive for wood-based panels, its preparation method and application. Background technique [0002] With the rapid development of construction, decoration, packaging and other industries, the output of wood-based panels in my country has increased rapidly. In 2012, the total output of wood-based panels in my country was 286 million square meters, accounting for about 50% of the world's total output. Among them, particleboard was 12.89 million square meters, a year-on-year increase of 7.2%; fiberboard was 55.54 million square meters, a year-on-year increase of 13.1%; plywood was 142 million square meters, a year-on-year increase of 18.3%. The total output of wood-based panels, plywood, furniture and wood flooring has ranked first in the world for many years. [0003] The adhesives commonly used in the production of wood-based panels are formaldehyde-based synthetic resins,...

Claims

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Application Information

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IPC IPC(8): C09J189/00C09J11/08C09J11/04
Inventor 高强李建章张世锋周文瑞张伟陈惠
Owner XUZHOU ANLIAN WOOD
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