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Preparation method of starch adhesive used for artificial board production

A starch adhesive and wood-based panel technology, applied in the direction of starch-derived adhesives, adhesive types, polymer adhesive additives, etc., can solve problems such as endangering the environment and human health, and achieve improved bonding performance and water resistance , The process is simple, and the effect of rapid promotion and application

Active Publication Date: 2012-07-25
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a preparation method of an environmentally friendly starch adhesive with high concentration and low viscosity, good fluidity, fast drying speed, and strong water resistance for wood-based panel production, so as to solve the problems existing in the current wood-based panel manufacturing industry. problems harmful to the environment and human health

Method used

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  • Preparation method of starch adhesive used for artificial board production
  • Preparation method of starch adhesive used for artificial board production
  • Preparation method of starch adhesive used for artificial board production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] formula:

[0020]

[0021] Process: Mix 100g cornstarch with 60mL, 1.5mol / L hydrochloric acid to make starch milk with a concentration of 30g / 100g, add 4g ammonium persulfate, put it into a four-necked flask equipped with a stirrer, and acidify at 60°C After 100 minutes of deoxidation, adjust the pH to 6.5, add 14mL of hexamethoxymethylmelamine, 0.5g of catalyst oxalic acid, add 3g of polyvinyl alcohol after 60 minutes of reaction, then raise the temperature to 90°C and keep it for 30 minutes, slowly cool down to 50°C, add 11mL of styrene-butadiene Latex, heat preservation 30min and discharge to obtain the starch adhesive.

[0022] Corn starch, the prepared starch adhesive, and hexamethoxymethylmelamine were analyzed by infrared spectroscopy, and the results are shown in Figure 1 below. It can be seen from Figure 1 that the infrared spectrum of the reaction product of hexamethoxymethyl melamine and corn starch is roughly similar to that of unmodified corn starch. H...

Embodiment 2

[0027]

[0028] Process: Mix 100g of cornstarch with 60mL, 2mol / L hydrochloric acid to make starch milk with a concentration of 40% (w / w), add 5g of ammonium persulfate, put it into a four-necked flask equipped with a stirrer, and heat it at 60°C After acidolysis and oxidation for 90 minutes, adjust the pH to 7, add 22mL hexamethoxymethyl melamine, 0.85g catalyst citric acid, add 2.5g polyvinyl alcohol after 75 minutes of reaction, then raise the temperature to 85°C and keep it for 30min, then slowly cool down to 50°C, Add 16mL of water-repellent styrene-butadiene latex, keep warm for 30min, and discharge to obtain the prepared starch adhesive. The obtained starch adhesive is applied to the pressing of the particleboard, and the internal bonding strength of the obtained particleboard reaches 0.41MPa, which meets the requirement of ≥0.4MPa in the national standard for particleboard, and the water expansion rate of 7.2% meets the requirement of ≤8% in the national standard for...

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Abstract

The invention provides a preparation method of a starch adhesive used for artificial board production, belonging to the technical field of preparation of adhesives. The invention provides a method for preparing an environment-friendly starch adhesive used for artificial board production by taking starch as a main raw material. The preparation process of the adhesive provided by the invention comprises the following steps of: carrying out acidolysis oxidation pre-treatment on starch milk, then performing cross-linking reaction on the starch milk with hexamethoxy methyl melamine resin under the action of a catalyst, adding polyvinyl alcohol and then warming and pasting, cooling and then adding an appropriate auxiliary, and finally obtaining environment-friendly non-toxic starch adhesive used for an artificial board. The adhesive prepared by adopting the preparation method provided by the invention has the advantages of high bonding strength, high water resistance, strong flowability and fast drying speed and can be widely applied to production of the artificial board.

Description

technical field [0001] The invention relates to a preparation method of a starch adhesive for artificial board production, belonging to the technical field of adhesive preparation. Background technique [0002] As the contradiction between timber supply and demand becomes increasingly prominent, it is an effective measure to solve the contradiction between timber supply and demand by increasing the intensity of research on timber processing and utilization in plantations, developing efficient and comprehensive utilization of timber, and making full use of harvesting residues, processing residues and inferior timber to develop wood-based panels. Adhesives play a pivotal role in the production of wood-based panels. [0003] According to different raw materials, wood-based panels can be divided into fiberboard, particleboard and plywood. At present, the dominant type of glue used in the production of wood-based panels is still trialdehyde glue (urea-formaldehyde resin, phenoli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J103/10C09J129/04C09J11/08
Inventor 顾正彪程力王鹏李兆丰洪雁
Owner JIANGNAN UNIV
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