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Non-formaldehyde albumin adhesive and preparation method thereof

An adhesive and protein glue technology, which is used in the preparation of protein adhesives, animal glue or gelatin, and adhesives, etc., can solve the problem of formaldehyde release from gluing wood-based panels, inability to use wood-based panels for outdoor use, and poor water resistance. and other problems, to achieve the effect of uniform adhesive system, good stability and good water retention

Inactive Publication Date: 2019-03-22
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, urea-formaldehyde resin also has obvious disadvantages, such as poor aging resistance, poor water resistance, and cannot be used to prepare wood-based panels for outdoor use.
[0003] If feather powder is used as raw material to prepare adhesives for wood-based panels, the problem of free formaldehyde emission from wood-based panels can be solved. However, hydrolyzed feather powder has a large amount of silicified cuticles and a large protein molecular weight, resulting in poor water resistance, poor emulsification, and poor solubility. and other problems, it is difficult to apply to the production of wood-based panels

Method used

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  • Non-formaldehyde albumin adhesive and preparation method thereof

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preparation example Construction

[0047] Above-mentioned curing agent is hydroxyethyl melamine; The preparation method of described curing agent comprises the following steps:

[0048]Put 160kg of 30% glyoxal solution into the reaction kettle, adjust the pH value to 9.0, heat to 60°C, add 55kg of melamine into the reaction solution, raise the temperature to 80°C, keep it warm for 30 minutes, adjust the pH value to 6.0, and react 10 minutes, adjust the pH value to 10.0 and react for 30 minutes, low temperature distillation to 50% solid content, cool down and discharge.

[0049] The above-mentioned dispersion medium water is selected from ordinary tap water or demineralized water.

[0050] The adhesive prepared by the preparation method of the present invention, the aldehyde-free protein adhesive has small molecular weight, high activity, good solubility, self-reinforcement, high water-resistant bonding performance, and high stability, and the prepared board can meet the requirements of wood-based panels. The w...

Embodiment 1

[0053] An aldehyde-free protein adhesive consisting of the following materials by weight:

[0054] Demineralized water 72 kg;

[0055] Feather meal 35 kg;

[0056] Bromelain 0.1 kg;

[0057] Activator 0.5 kg;

[0058] Ethylene glycol diglycidyl ether 0.3 kg;

[0059] Curing agent 0.9 kg.

[0060] When using the formaldehyde-free protein adhesive in this example: Stir the prepared feather protein adhesive prepolymer and curing agent at room temperature for 10 minutes, and stir well before use.

Embodiment 2

[0062] An aldehyde-free protein adhesive consisting of the following materials by weight:

[0063] Demineralized water 72 kg;

[0064] Feather meal 35 kg;

[0065] Bromelain 0.3 kg;

[0066] Activator 1 kg;

[0067] Ethylene glycol diglycidyl ether 0.5 kg;

[0068] Curing agent 1.2 kg.

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Abstract

The invention discloses a non-formaldehyde albumin adhesive and a preparation method thereof, and relates to the technical field of artificial board adhesives. The non-formaldehyde albumin adhesive isprepared from the following raw materials: feather meal, bromelain, dispersion medium water, an activating agent, ethylene glycol diglycidyl ether and a curing agent. The non-formaldehyde albumin adhesive prepared from the raw materials is small in molecular weight, high in activity, good in solubility, capable of being self-enhanced, high in waterproof adhesion performance and high in stability;a prepared board can meet the requirement on water resistance of the artificial board adhesive; the preparation method is low in cost and easy to implement.

Description

technical field [0001] The invention relates to the technical field of wood-based panel adhesives, in particular to a formaldehyde-free protein adhesive and a preparation method thereof. Background technique [0002] my country has abundant plantation forest resources. The wood-based panels prepared by using plantation forest fast-growing wood and wood adhesives are the main raw materials for furniture floors and interior decoration in the living environment. In recent years, the consumption of wood adhesives in my country is about 40 million tons. (solid content 50%), among which urea-formaldehyde resin and its modified products account for more than 90% of the total output of adhesives, occupying a dominant position. Urea-formaldehyde resin and its modified adhesives are widely used in the wood industry due to their advantages, such as sufficient raw materials, low price, good water solubility, and light color of the glue layer. However, urea-formaldehyde resin also has ob...

Claims

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Application Information

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IPC IPC(8): C09J189/00C09J11/06
CPCC09J11/06C09J189/00C08K5/5435
Inventor 罗晶李建章高强
Owner NANJING FORESTRY UNIV
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