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Water-resistant bio-based formaldehyde-free adhesive for wood and preparation method thereof

An aldehyde adhesive, bio-based technology, applied in the field of aldehyde-free adhesive preparation, can solve the problems of unfavorable industrialization of soybean protein adhesives, high cost of soybean protein adhesives, high solid content, etc. The effect of reducing the amount, reducing the processing energy consumption and increasing the solid content

Active Publication Date: 2015-05-20
茌平县金大通木业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of the above-mentioned water-soluble crosslinking modifier is relatively large, resulting in higher cost of the soybean protein adhesive; on the other hand, the reactivity of the above-mentioned water-soluble crosslinking modifier is relatively high. not too high
[0008] Patent CN201410305729.X uses the composite reactant of maleic anhydride and polyethyleneimine (PEI) as the cross-linking agent of soybean protein adhesive, and the effect is comparable to that of PAE, but PEI is expensive, which is not conducive to the adhesion of soybean protein industrialization

Method used

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  • Water-resistant bio-based formaldehyde-free adhesive for wood and preparation method thereof
  • Water-resistant bio-based formaldehyde-free adhesive for wood and preparation method thereof
  • Water-resistant bio-based formaldehyde-free adhesive for wood and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0034] Synthesis example 1 (polycondensation product of polyol and dialdehyde)

[0035] 80 parts by mass of water, 30 parts by mass of sorbitol, and 50 parts by mass of glutaraldehyde were added to the reaction flask, the temperature was raised to 70°C, and the temperature was kept for 3 hours to obtain a mixture of polyol and dialdehyde with an active ingredient content of 50%. Aqueous polycondensate solution, labeled N-1.

Synthetic example 2

[0036] Synthesis example 2 (polyamide uret epoxy adduct)

[0037] Add 5 parts by mass of water, 50 parts by mass of spermidine, and 40 parts by mass of adipic acid into the reaction flask, raise the temperature to 160°C for 30 minutes, then slowly raise the temperature to 190°C, and continue the reaction for 2 hours under vacuum. After the vacuum was broken, the temperature was lowered to 100° C., 10 parts by mass of urea was added, and the temperature was raised to 130° C. for 1.5 h. After lowering the temperature to 100°C again, 100 parts by mass of water was added to obtain an aqueous solution of polyamide urea. At 35°C, add 25 parts by mass of epichlorohydrin, slowly raise the temperature to 60°C, and react for 3 hours to obtain an aqueous solution of polyamide uret epoxy adduct with an active ingredient content of 50%, marked as N-2.

Synthetic example 3

[0038] Synthesis example 3 (polyamide uret epoxy adduct)

[0039] Only spermidine is replaced by spermidine mixture, epichlorohydrin is replaced by ethylene glycol diglycidyl ether, the rest is the same as in Synthesis Example 2, and the obtained aqueous solution of polyamide uret epoxy adduct with an active ingredient content of 50% , labeled N-3.

[0040] The commercially available active ingredient is 30% KR-005 ammonium zirconium carbonate (Lishui City Kairun Chemical Co., Ltd.), marked as N-4.

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Abstract

The invention discloses a water-resistant bio-based formaldehyde-free adhesive for wood and a preparation method thereof, belonging to the technical field of adhesives. The water-resistant bio-based formaldehyde-free adhesive comprises a protein-containing material, a biological enzyme, a preservative, a water-resistance enhancement modifier, water and the like. The preparation method comprises the following steps: adding the water into a reaction kettle while controlling the temperature at 30-55 DEG C; sequentially adding the biological enzyme and soybean protein, stirring uniformly, regulating the pH value to 4-6.5, and carrying out enzymolysis for 20-70 minutes; and regulating the pH value to 7.5-10, adding the preservative and water-resistance enhancement modifier, and stirring uniformly. The water-resistant bio-based formaldehyde-free adhesive for wood has the advantages of environment friendliness, high storage stability, high solid content, lower energy consumption, favorable adhesion strength and favorable water resistant; the consumption of the water-resistant bio-based formaldehyde-free adhesive for wood is obviously lowered; and the cost is obviously lowered.

Description

technical field [0001] The invention discloses a water-resistant bio-based formaldehyde-free adhesive for wood and a preparation method thereof, belonging to the technical field of formaldehyde-free adhesive preparation. Background technique [0002] The wood processing industry has a great demand for adhesives, and the annual consumption of adhesives accounts for about 60% of the total adhesive dosage. The wood adhesives on the market are mainly "trialdehyde glues" (urea-formaldehyde glue, phenolic glue, etc.) , Melamine-formaldehyde glue), especially urea-formaldehyde glue. Urea-formaldehyde resin has the characteristics of simple production process, low raw material price, high initial viscosity, high bonding strength, colorless and transparent, and does not pollute wood products. Its consumption once accounted for about 80% of the total glue consumption in the wood processing industry. However, the use of "trialdehyde glue" to prepare plywood will release formaldehyde d...

Claims

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Application Information

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IPC IPC(8): C09J189/00C09J11/08C09J11/06C09J11/04
Inventor 张博张学廷张平
Owner 茌平县金大通木业有限公司
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