Additive agent of urea-formaldehyde resin adhesive and preparation method thereof

A urea-formaldehyde resin and additive technology, which is applied in the directions of polymer adhesive additives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems of unfavorable utilization rate of urea-formaldehyde resin, reduce the amount of formaldehyde released, and reduce the price. , a wide range of effects

Inactive Publication Date: 2013-01-02
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is detrimental to increasing the utilization rate of urea-formaldehyde resin

Method used

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  • Additive agent of urea-formaldehyde resin adhesive and preparation method thereof
  • Additive agent of urea-formaldehyde resin adhesive and preparation method thereof
  • Additive agent of urea-formaldehyde resin adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The preparation of embodiment 1 urea-formaldehyde resin adhesive

[0058] 1) Disperse 10kg of wheat starch in 100kg of water and heat to 60°C to form a uniform paste solution, then dry at 105°C for 2 hours to obtain modified starch, the obtained modified starch has a water content of 4% and a fineness of 100 mesh.

[0059] 2) Mix the modified starch, polyacrylamide, sodium dodecylbenzenesulfonate, and desulfurized gypsum obtained in step 1 in a mixer according to the weight ratio of 100:1:0.1:300 to obtain urea-formaldehyde resin additive. The fineness of the desulfurized gypsum is 200 mesh.

[0060] 3) Mix the prepared urea-formaldehyde resin additive according to the weight ratio of urea-formaldehyde resin: urea-formaldehyde resin additive: ammonium chloride = 100:20:1 to obtain the urea-formaldehyde resin adhesive of the present invention.

Embodiment 2

[0061] The preparation of embodiment 2 urea-formaldehyde resin adhesive

[0062] 1) Disperse 10kg of wheat starch in 100kg of water and heat to 60°C to form a uniform paste solution, then dry at 105°C for 2 hours to obtain modified starch, the obtained modified starch has a moisture content of 6% and a fineness of 200 mesh.

[0063] 2) Mix the modified starch obtained in step 1, polyacrylamide, sodium lauryl sulfate, and desulfurized gypsum in a mixer according to the weight ratio of 100:5:2:500 to obtain a urea-formaldehyde resin additive. The fineness of the desulfurized gypsum is 300 mesh.

[0064] 3) Mix the prepared urea-formaldehyde resin additive according to the weight ratio of urea-formaldehyde resin: urea-formaldehyde resin additive: ammonium chloride = 100:30:2 to obtain the urea-formaldehyde resin adhesive of the present invention.

Embodiment 3

[0065] The preparation of embodiment 3 urea-formaldehyde resin adhesive

[0066] 1) Disperse 10kg of wheat starch in 100kg of water and heat to 60°C to form a uniform paste solution, then dry at 105°C for 2 hours to obtain modified starch, the obtained modified starch has a water content of 10% and a fineness of 300 mesh.

[0067] 2) Mix the modified starch, polyacrylamide, benzalkonium chloride and desulfurized gypsum obtained in step 1 uniformly in a mixer according to the weight ratio of 100:2:1.5:350 to obtain a urea-formaldehyde resin additive. The fineness of the desulfurized gypsum is 300 mesh.

[0068] 3) Mix the prepared urea-formaldehyde resin additive according to the weight ratio of urea-formaldehyde resin: urea-formaldehyde resin additive: ammonium chloride = 100:30:2 to obtain the urea-formaldehyde resin adhesive of the present invention.

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Abstract

The invention provides an additive agent of urea-formaldehyde resin adhesive and a preparation method thereof. The additive agent of the urea-formaldehyde resin adhesive is prepared from the following components in parts by weight: 100 parts of modified starch, 1-5 parts of polymer compound, 300-500 parts of desulfurization gypsum, and 0.1-2 parts of swelling agent which are mixed uniformly to obtain the additive agent. The additive agent of the urea-formaldehyde resin can replace flour to be added into urea-formaldehyde resin, the adhesive is endowed with favorable prepressing when artificial plates are prepared, the high production efficiency of the artificial plates is ensured, simultaneously the formaldehyde emission of the artificial plates can be reduced effectively, the problem of volume reduction in the process of preparing the urea-formaldehyde resin adhesive is solved, and the physical mechanical property of the artificial plates is improved.

Description

technical field [0001] The invention relates to an additive for an adhesive, in particular to an additive for a urea-formaldehyde resin adhesive for a wood-based panel and a preparation method thereof. Background technique [0002] Over the past 30 years, my country's wood industry has developed rapidly. In 2009, the total output of wood-based panels in my country was 115.46 million cubic meters, the output of plywood was 44.5124 million cubic meters, and the output of blockboard was 14.7871 million cubic meters. The total output of wood-based panels, plywood and blockboard ranks first in the world. Only plywood and blockboard consume up to 6 million tons of adhesives (50% solid content) per year. In the production process of plywood and blockboard, 20-30% of the total weight of flour is often added to the adhesive as a filler to improve the pre-pressing performance of the adhesive, improve production efficiency, reduce the amount of adhesive, reduce production costs, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/04C09J11/08C09J11/04C09J11/06C09J161/24
Inventor 李建章张世锋高强周文瑞
Owner BEIJING FORESTRY UNIVERSITY
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