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A modifier for efficiently eliminating free formaldehyde and its preparation method

A technology for eliminating free and modifying agents, applied in non-polymer adhesive additives, aldehyde/ketone condensation polymer adhesives, adhesives, etc., can solve problems such as affecting popularization and application, high cost, secondary pollution, etc. To achieve the effect of simple preparation process and use method, low cost and no secondary pollution

Active Publication Date: 2015-08-12
湖南宏润科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, many achievements have been made at home and abroad in solving the environmental protection problems of using adhesives for wood-based panels, such as the use of soybean glue, isocyanate glue, etc. Although the control of formaldehyde emission has been improved, due to its high cost , which directly affects its popularization and application; some schemes improve the release of free formaldehyde while increasing the release of other volatiles, and even the release of other carcinogenic and teratogenic chemical volatiles, resulting in new secondary pollution

Method used

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  • A modifier for efficiently eliminating free formaldehyde and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh the following raw materials according to the following weights: 60 kg of zeolite powder, 30 kg of magnesium-calcium powder, 100 kg of nano-silica (the aforementioned three inorganic materials have been surface-modified), 260 kg of sodium sulfite, 210 kg of ammonium sulfate, and 70 kg of acid dihydrazide, 6.7 kg of copper hydroxide, 290 kg of oxidized modified starch enhancer, and 100 kg of aminoacetic acid, add the above raw materials into the twin-screw conical mixer in turn, start the mixer to stir, and continue to Stir until it is completely dispersed and mixed evenly, and then unload and seal the package to obtain the modifier.

Embodiment 2

[0020] Weigh the following raw materials according to the following weights: 60 kg of zeolite powder, 50 kg of magnesium-calcium powder, 80 kg of nano-silica (the aforementioned three inorganic materials have been surface-modified), 300 kg of sodium sulfite, 170 kg of ammonium sulfate, and 60 kg of acid dihydrazide, 5 kg of copper hydroxide, 320 kg of oxidized modified starch enhancer, and 80 kg of aminoacetic acid, add the above raw materials into the twin-screw conical mixer in turn, start the mixer to stir, and continue to Stir until it is completely dispersed and mixed evenly, and then unload and seal the package to obtain the modifier.

Embodiment 3

[0022] Weigh the following raw materials according to the following weights: 50 kg of zeolite powder, 40 kg of magnesium-calcium powder, 90 kg of nano-silica (the aforementioned three inorganic materials have been surface-modified), 270 kg of sodium sulfite, 200 kg of ammonium sulfate, and 80 kg of acid dihydrazide, 10 kg of copper hydroxide, 300 kg of oxidized modified starch enhancer, and 90 kg of aminoacetic acid, add the above raw materials into the twin-screw conical mixer in turn, start the mixer to stir, and continue to Stir until it is completely dispersed and mixed evenly, and then unload and seal the package to obtain the modifier.

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Abstract

The invention discloses a modifying agent for efficiently removing free formaldehyde. The modifying agent is used for modifying a urea-formaldehyde resin adhesive. The modifying agent is a mixture consisting of the following components in weight ratio: 170-210 parts of inorganic filler, 290-320 parts of reinforced modifier, 430-510 parts of salt compound, 60-80 parts of hydrazide compound, 80-100 parts of glycine and 5-10 parts of copper hydroxide. The invention further discloses a preparation method of the modifying agent. The raw materials are respectively weighed according to the weight ratio of all the components and sequentially added into a double-screw conical mixer, a blender is started to stir and continuously stirs after all the raw materials are completely added until the raw materials are completely dispersed and uniformly mixed, and the mixture only needs to be discharged, sealed and packaged. The modified urea-formaldehyde resin adhesive is suitable for various plates, the free formaldehyde released from the plates can be effectively reduced, and moreover, the strength of the plate adhesive is improved, in particular to the wet strength.

Description

technical field [0001] The invention relates to a modifier for efficiently eliminating free formaldehyde used for modifying urea-formaldehyde resin adhesives and a preparation method thereof. Background technique [0002] With the improvement of people's material life, home decoration is becoming more and more common, which leads to the extensive use of man-made panels in the decoration process, especially the increasing shortage of natural wood, which leads to the increase in the use of man-made panels, such as large core boards (joiner board), plywood, veneer, especially the large core board, but the artificial board must use adhesives in the manufacturing process. Due to the low cost of urea-formaldehyde resin and its good adhesive performance, most manufacturers currently use urea-formaldehyde resin as adhesive. However, during the preparation and use of urea-formaldehyde resin, free formaldehyde will be released, and the artificial boards produced with urea-formaldehyd...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J11/04C09J11/06C09J161/24
Inventor 谭志刚
Owner 湖南宏润科技发展有限公司
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