Soybean meal adhesive for blockboards, and preparation method thereof

A technology for blockboard and adhesive, applied in the field of boards, can solve the problems of limited industrial application of wood-based panels, such as durability, free formaldehyde release, poor water-resistant bonding performance, etc. performance, the effect of improving the initial viscosity

Active Publication Date: 2020-09-18
DEHUA TB NEW DECORATION MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of soybean meal adhesives to prepare wood-based panels can effectively solve the problem of free formaldehyde release from wood-based panels. The Chinese patent with the publication number CN201710505045.8 discloses an adhesive for wooden furniture, but its water-resistant bonding performance is poor and its manufacturability is poor. , easy to mildew and other problems, limiting its industrial application and the durability of the prepared wood-based panels

Method used

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  • Soybean meal adhesive for blockboards, and preparation method thereof

Examples

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Effect test

Embodiment 1

[0029] A soybean meal adhesive for blockboard, comprising the following components: 22g soybean meal powder, 86g distilled water, 2g trypsin, 1g composite viscosity modifier, 2g branched polymer crosslinking agent, 0.04g calcium phosphate;

[0030] The preparation method of described branched polymer crosslinking agent comprises the steps:

[0031] S1. After reacting phthalic acid, maleic anhydride, and diethylenetriamine at 150°C, cool down and dilute to obtain a hyperbranched amino polymer;

[0032] S2. After mixing epichlorohydrin, solvent, and the hyperbranched amino polymer at 60°C for reaction, adjust the pH to 8 to obtain the branched polymer crosslinking agent;

[0033] The composite viscosity regulator includes polyvinyl alcohol, sodium carboxymethylcellulose, and bentonite at a mass ratio of 1:1:5.

Embodiment 2

[0035] A soybean meal adhesive for blockboards, comprising the following components: 26g of soybean meal powder with a protein content of 43%-45% and a particle size of 160 meshes, 86g of distilled water with a pH of 7.3-7.5, 3g of trypsin, and 2g of compound viscosity Regulator, 3g branched polymer crosslinking agent, 0.08g calcium phosphate;

[0036] The preparation method of described branched polymer crosslinking agent comprises the steps:

[0037] S1. After reacting 0.9mol phthalic acid, 0.1mol maleic anhydride, and 1.4mol diethylenetriamine at 150°C for 3 hours, cool down and dilute with water to obtain a hyperbranched amino polymer, add water to dilute to a hyperbranched amino polymer The mass fraction of is 25%;

[0038] S2. Mix 25g of epichlorohydrin, 50g of water, and 50g of the hyperbranched amino polymer with a mass fraction of 25% and react at 60°C, then adjust the pH to 8 to obtain the branched polymer crosslinking agent.

[0039] The composite viscosity regula...

Embodiment 3

[0041] A soybean meal adhesive for blockboard, comprising the following components: 25g protein content is 43%-45%, particle size is 160 mesh soybean meal powder, 86g pH is 7.3-7.5 distilled water, 2.5g trypsin, 1.5g Compound viscosity modifier, 2.5g branched polymer crosslinking agent, 0.06g calcium phosphate;

[0042] The preparation method of described branched polymer crosslinking agent comprises the steps:

[0043] S1. After reacting 1.8mol phthalic acid, 0.2mol maleic anhydride, and 2.8mol diethylenetriamine at 150°C for 3 hours, cool down and dilute with water to obtain a hyperbranched amino polymer, add water to dilute to a hyperbranched amino polymer The mass fraction of is 30%;

[0044] S2. Mix 50g of epichlorohydrin, 100g of water, and 100g of the hyperbranched amino polymer with a mass fraction of 25% and react at 60°C, then adjust the pH to 8 to obtain the branched polymer crosslinking agent.

[0045] The composite viscosity regulator includes polyvinyl alcohol,...

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Abstract

The invention discloses a soybean meal adhesive for blockboards, and a preparation method thereof. The adhesive comprises, by mass, 22-26 parts of soybean meal powder, 86 parts of a dispersing agent,2-3 parts of trypsin, 1-2 parts of a composite viscosity regulator, 2-3 parts of a branched polymer cross-linking agent and 0.04-0.04 part of calcium phosphate. The preparation method comprises the following steps: K1, performing plasma treatment on the soybean meal powder in a nitrogen atmosphere, then adding calcium chloride and the dispersing agent, performing ultrasonic treatment, adding trypsin, performing treatment at 50-60 DEG C for 20 minutes, cooling, adding phosphoric acid, and performing uniform stirring to obtain a first mixture; and K2, adding calcium phosphate and the branched polymer cross-linking agent into the first mixture, uniformly stirring, adding the composite viscosity regulator, mixing, and regulating the pH value to 9.0 to obtain the soybean meal adhesive for the blockboards. The adhesive is good in water-resistant adhesive property, and ensures the practical performance of the adhesive and the durability of the blockboards.

Description

technical field [0001] The invention relates to the technical field of boards, in particular to a soybean meal adhesive for blockboards and a preparation method thereof. Background technique [0002] my country has abundant artificial forest resources, but it cannot be directly used as furniture and other materials. The artificial board prepared by using artificial forest fast-growing wood through adhesive is the main raw material for furniture flooring and interior decoration in the living environment. In recent years, my country's joinery The output of board is 16 million cubic meters per year, 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 adhesives are widely used in the wood industry due to the advantages of sufficient raw materials, low price, and good water solubility, but there is a problem of formaldehyde release from products. With the i...

Claims

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Application Information

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IPC IPC(8): C09J189/00C09J11/08C09J11/04C08G83/00
CPCC08G83/005C08K2003/325C08L2205/025C08L2205/035C08L2312/00C09J11/04C09J11/08C09J189/00C08L89/00C08L29/04C08L1/286C08L87/00C08K3/346C08K3/32
Inventor 高强李建章詹先旭贾焕亮杨勇
Owner DEHUA TB NEW DECORATION MATERIAL CO LTD
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