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Adhesive for indoor plywood

A technology for adhesives and plywood, applied in adhesives, monocarboxylic acid ester copolymer adhesives, aldehyde/ketone condensation polymer adhesives, etc., can solve the problem of reducing the molar ratio of formaldehyde to urea, unsatisfactory bonding water resistance, Solve problems such as high formaldehyde content, and achieve the effects of good viscosity performance, improved physical and mechanical properties, and high production efficiency

Inactive Publication Date: 2015-07-08
黄琳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Urea-formaldehyde resin adhesive is the most widely used adhesive in the wood industry. Its price is low, but it contains free formaldehyde. The glued products will slowly release formaldehyde gas during use and cause environmental pollution. Secondly, its glued water resistance is not ideal.
At present, the main methods to solve the above problems include: in the preparation process of urea-formaldehyde glue, reduce the molar ratio of formaldehyde to urea, adopt the process of adding urea multiple times, modify with melamine, thiourea, polyvinyl alcohol, etc., or use it in urea-formaldehyde glue Formaldehyde scavenger is sometimes added, but the amount of free formaldehyde contained in the urea-formaldehyde resin adhesive prepared by the above method is still very high

Method used

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  • Adhesive for indoor plywood
  • Adhesive for indoor plywood
  • Adhesive for indoor plywood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh the following raw materials according to the proportion:

[0025]

[0026] The preparation method of described indoor plywood adhesive is as follows:

[0027] Blend the urea-formaldehyde resin with nano-silica, stir mechanically for 10 minutes, then add china clay and silica, continue mechanically stirring for 10 minutes, then add polyvinyl alcohol, stir mechanically for 15 minutes, then add polyvinyl acetate emulsion, stir mechanically for 8 minutes, Calcium sulfoaluminate was added, mechanically stirred for 15 minutes, then silicone rubber, octylphenol polyoxyethylene ether, polyaspartic acid, propylene glycol and sodium stearate were added in sequence, and ultrasonic wave was stirred intermittently for 100 minutes with a frequency of 90KHz and a temperature of 80°C, the adhesive for indoor plywood can be obtained.

Embodiment 2

[0029] Weigh the following raw materials according to the proportion:

[0030]

[0031] The preparation method of described indoor plywood adhesive is as follows:

[0032] Blend urea-formaldehyde resin with nano silicon dioxide, stir mechanically for 13 minutes, then add activated clay and silica, continue mechanical stirring for 9 minutes, then add polyvinyl alcohol, stir mechanically for 16 minutes, then add polyvinyl acetate emulsion, and stir mechanically for 7 minutes , and calcium sulfoaluminate was added, mechanically stirred for 18 minutes, and then silicone rubber, octylphenol polyoxyethylene ether, polyaspartic acid, propylene glycol and sodium stearate were added in sequence, ultrasonic intermittent stirring was carried out for 85 minutes, the frequency was 95KHz, and the temperature at 75°C, the adhesive for indoor plywood is obtained.

Embodiment 3

[0034] Weigh the following raw materials according to the proportion:

[0035]

[0036] The preparation method of described indoor plywood adhesive is as follows:

[0037] Blend the urea-formaldehyde resin with nano-silica, stir mechanically for 15 minutes, then add china clay and silica, continue mechanical stirring for 8 minutes, then add polyvinyl alcohol, stir mechanically for 18 minutes, then add polyvinyl acetate emulsion, stir mechanically for 5 minutes, Calcium sulfoaluminate was added, mechanically stirred for 20 minutes, then silicone rubber, octylphenol polyoxyethylene ether, polyaspartic acid, propylene glycol and sodium stearate were added in sequence, and ultrasonic waves were stirred intermittently for 75 minutes at a frequency of 105 KHz and a temperature of 70°C, the adhesive for indoor plywood can be obtained.

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Abstract

The invention relates to the technical field of adhesive, in particular to adhesive for indoor plywood. The adhesive comprises, by weight, 50-70 parts of urea resin, 10-20 parts of silicone rubber, 8-15 parts of octyl phenol polyoxyethylene ether, 20-30 parts of polyaspartic acid, 2-4 parts of calcium sulphoaluminate, 10-20 parts of propylene glycol, 8-13 parts of sodium stearate, 6-12 parts of porous inorganic filler, 3-8 parts of polyvinyl acetate emulsion, 1-5 parts of nano-silica and 5-10 parts of water. The adhesive for the indoor plywood is good in viscosity, has the antiseptic and anti-static functions and contains lower formaldehyde, the water resistance and aging resistance of the adhesive are improved greatly, and the service life of the adhesive is prolonged by half a year to one year. The adhesive is mainly applied to bonding of the inner plywood.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to an adhesive for indoor plywood. Background technique [0002] With the improvement of people's living standards, people attach great importance to health, and the formaldehyde released by today's indoor plywood poses a serious threat to human health. When the formaldehyde content released by the new indoor plywood is very high, people often use the dilution method to raise a few potted plants in the house, such as pothos and spider plants are very effective, but the absorption speed of these plants cannot keep up with the volatilization of formaldehyde. Speed, so the effect of using plants to remove formaldehyde is very small. In addition, some physical materials are used, such as activated carbon and Maya blue. They themselves have a porous structure and can effectively absorb harmful gases in the air. However, the disadvantage of activated carbon is that it needs to be retur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J161/24C09J183/04C09J179/08C09J171/02C09J131/04C09J129/04C09J11/04C09J11/06
Inventor 黄琳
Owner 黄琳
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