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A kind of urea-formaldehyde resin for e1 level melamine modified solid wood floor substrate

A technology of melamine and solid wood flooring, applied in the direction of aldehyde/ketone condensation polymer adhesives, adhesive types, adhesives, etc., can solve the problems of short storage period of products, complicated operation of adhesives, and high technical requirements, and achieve storage period Long, easy to implement, and simple production process

Active Publication Date: 2018-01-02
GUANGXI NANNING QIAOSHENG WOOD
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

In addition, traditional adhesives are complicated to operate, require high technology, and the products produced have a short storage period.

Method used

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Embodiment Construction

[0018] Now in conjunction with embodiment the present invention is described in detail:

[0019] A urea-formaldehyde resin for E1 grade melamine-modified solid wood floor substrates, the technical proposal is that the resin is composed of formaldehyde, urea, melamine, polyvinyl alcohol, caustic soda, and ammonium chloride.

[0020] The specific implementation is as follows:

[0021] 1. Composition and ratio of raw materials: 530 kg of formaldehyde, 275 kg of urea, 100 kg of melamine, 2 kg of polyvinyl alcohol, appropriate amount of caustic soda, and appropriate amount of ammonium chloride.

[0022] 2. Preparation method: The first step is to detect and measure formaldehyde first, then add it to the reaction kettle, then start it up and stir, and add an appropriate amount of caustic soda and ammonium chloride to adjust the pH value of the reaction solution to 3.8-4.0, then add the above-mentioned melamine, Polyvinyl alcohol and the first urea, and finally the temperature of th...

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Abstract

The invention relates to urea resin for an E1-grade melamine modified solid wood floor base material. The urea resin is prepared from formaldehyde, urea, melamine, polyvinyl acid, caustic soda and ammonium chloride. The preparation process comprises the following steps: first combining the formaldehyde, the melamine, the polyvinyl acid and the primary urea; then adding an appropriate amount of caustic soda and ammonium chloride in different steps to adjust the PH of a reaction solution according to different temperatures of the reaction solution, beginning to lower the temperature when the temperature of the reaction solution is increased to 92 DEG C, re-adding urea into the reaction solution in three steps, and after all the materials are combined completely, and when the temperature of the reaction solution is dropped to 43 DEG C, obtaining a finished product. Compared with a traditional adhesive product, the urea resin is simple in formula; the application of free formaldehyde is reduced, and both the environmental protection and the cost conservation are realized. In addition, by implementing the technical solution of the invention, the formed urea resin finished product is environment-friendly, low in cost and long in storage life.

Description

technical field [0001] The invention belongs to a method for preparing a resin, and in particular relates to a urea-formaldehyde resin for E1 grade melamine-modified solid wood floor substrates. technical background [0002] Wood-based panels are boards or molded products that are made of wood or other non-wood plants, separated into various unit materials by certain mechanical processing, and then combined with adhesives. Common wood-based panels include plywood, blockboard, particleboard, fiberboard, and laminated wood. [0003] Plywood is a kind of plywood, which is laminated by miscellaneous veneer and glue through heating. Generally, horizontal and firm cross lamination are used for lamination. The purpose is to play a role in increasing strength. Generally, the thickness of 12 centimeters and above requires more than 9 layers, and the thickness of 10 centimeters is more than 5 layers. There are 4 types of plywood by category, namely, weather-resistant and moisture-r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/38C09J161/30
CPCC08G12/38C09J161/30
Inventor 黄祚忠李宁胡海
Owner GUANGXI NANNING QIAOSHENG WOOD
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