Composite curing agent for muf resin adhesive and its application in the production of medium and high density fiberboard
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A composite curing agent and resin adhesive technology, applied in the direction of adhesive additives, adhesives, non-polymer adhesive additives, etc., can solve the problem of few patents of MUF curing agent, achieve excellent latency, improve production efficiency, Long pot life
Active Publication Date: 2021-06-08
大亚木业(肇庆)有限公司 +1
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Problems solved by technology
However, judging from the published patents at home and abroad, there are very few patents on the MUF curing agent used in the production of fiberboard by the pipeline air drying method that is suitable for sizing first and then drying
Method used
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Embodiment 1
[0023] A kind of preparation of composite curing agent for MUF resin adhesive:
[0024] 1. Weigh each component according to the following weight:
[0040] 2. Add the above components into the reaction kettle one by one, and stir evenly.
[0041] The main technical indicators of the obtained composite MUF resin curing agent are as follows:
[0042]
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Abstract
The invention belongs to the field of wood adhesives, and relates to curing agents, in particular to a composite curing agent for MUF resin adhesives, which consists of the following components by weight percentage: ammonium persulfate 15-35wt%, hexamethylenetetramine 20-28wt%, p-toluenesulfonic acid 18-27wt%, ethanolamine 18-27wt%. The present invention also applies the composite curing agent for the MUF resin adhesive to the production of medium and high density fiberboards. The composite curing agent disclosed by the invention has excellent latent properties, high hydrogen ion release initial temperature, but can promote fast curing of resin at high temperature; excellent curing performance; long pot life and the like. After the curing agent is blended with the adhesive, it can effectively prevent the pre-curing problem of the adhesive in the pipeline air-drying process, and can quickly release hydrogen ions during the high-temperature hot-pressing process, so that the adhesive can be quickly cured. Therefore, not only the comprehensive performance of the plate is improved, but also the production efficiency is greatly improved.
Description
technical field [0001] The invention belongs to the field of wood adhesives and relates to curing agents, in particular to a composite curing agent for MUF resin adhesives and its application in the production of medium and high density fiberboards. Background technique [0002] Urea-formaldehyde resin (UF) adhesives are widely used in the wood adhesive industry, but the shortcomings of high free formaldehyde content, easy aging and brittle cured products limit the further promotion of UF adhesives. Therefore, it is urgent to develop high-performance and low-toxicity adhesives. Low free UF. Melamine is alkaline, and after copolymerization and modification with UF, it forms melamine urea-formaldehyde resin (MUF), which can block the hydrophilic groups in urea-formaldehyde resin, increase the triazine benzene ring, and effectively improve the water resistance and heat resistance of the resin; Reacts with formaldehyde to form methylol melamine, reducing the free formaldehyde c...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information
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