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Production method of low aldehyde anti-mold urea-formaldehyde resin adhesive

An aldehyde-mildew-proof urea-formaldehyde resin and adhesive technology, which is applied in the directions of adhesives, adhesive additives, aldehyde/ketone condensation polymer adhesives, etc. and other problems, to avoid the gel effect, prevent air-conditioning disease, and prevent moth-eaten effects.

Active Publication Date: 2017-01-25
容县润达家具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] If wooden products are not kept well ventilated in rainy days, they are easily deformed due to air humidity, and even moldy and rotten, resulting in serious indoor musty smell, and the water resistance of wooden products is poor. Plate warpage

Method used

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  • Production method of low aldehyde anti-mold urea-formaldehyde resin adhesive

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Production method of modified urea-formaldehyde resin:

[0031] Pre-polymerization stage: Add formaldehyde solution to the polymerization reactor at one time, adjust the pH value to 8.5-9 with 30% sodium hydroxide solution, add the first batch of urea, and keep the temperature at 80-82℃ for 35-37min. Adjust the pH value to 5.5-6 with formic acid, and react at 80-82°C for 35-40 min. When the required viscosity is 22Pa.s, adjust the pH value to 8~8.2 with 30% sodium hydroxide solution;

[0032] Polymerization stage: After the pre-polymerization stage is over, add the second batch of urea and 3.5 parts of hydroxy acrylate resin, keep at 80-82℃ for 30-32min, cool to 70-72℃, adjust pH to 6-6.2, and React at 70~72℃ for 30~32min;

[0033] The late stage of polymerization: the temperature is raised to 80-82°C, the third batch of urea is added, and the reaction is carried out at 80-82°C for 35-40 minutes. After the three-stage reaction is over, the total ratio of the amount of urea ...

Embodiment 2

[0036] Production method of modified urea-formaldehyde resin:

[0037] Pre-polymerization stage: Add formaldehyde solution to the polymerization reactor at one time, adjust the pH value to 8.5-9 with 30% sodium hydroxide solution, add the first batch of urea, and keep the temperature at 80-82℃ for 35-37min. Adjust the pH value to 5.5-6 with formic acid, and react at 80-82°C for 35-40 min. When the required viscosity is 23Pa.s, adjust the pH value to 8~8.2 with 30% sodium hydroxide solution;

[0038] Polymerization stage: After the pre-polymerization stage is over, add the second batch of urea and 4 parts of hydroxy acrylate resin, keep it at 80~82℃ for 30~32min, cool to 70~72℃, adjust the pH value to 6~6.2, and React at 70~72℃ for 30~32min;

[0039] The late stage of polymerization: the temperature is raised to 80-82°C, the third batch of urea is added, and the reaction is carried out at 80-82°C for 35-40 minutes. After the three-stage reaction is over, the total ratio of the amou...

Embodiment 3

[0042] Production method of modified urea-formaldehyde resin:

[0043] Pre-polymerization stage: Add formaldehyde solution to the polymerization reactor at one time, adjust the pH value to 8.5-9 with 30% sodium hydroxide solution, add the first batch of urea, and keep the temperature at 80-82℃ for 35-37min. Adjust the pH value to 5.5-6 with formic acid, and react at 80-82°C for 35-40 min. When the required viscosity is 24Pa.s, adjust the pH value to 8~8.2 with 30% sodium hydroxide solution;

[0044] Polymerization stage: the pre-polymerization stage is over, add the second batch of urea and 6 parts of hydroxy acrylate resin, keep at 80-82℃ for 30-32min, cool to 70-72℃, adjust the pH value to 6-6.2, and React at 70~72℃ for 30~32min;

[0045] The late stage of polymerization: the temperature is raised to 80-82°C, the third batch of urea is added, and the reaction is carried out at 80-82°C for 35-40 minutes. After the three-stage reaction is over, the total ratio of the amount of ure...

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Abstract

The invention provides a low-formaldehyde mildewproof urea-formaldehyde resin adhesive which comprises the following raw materials in parts by weight: 60 parts of urea, 36-42 parts of formaldehyde, 5-12 parts of an adsorbent, 20-30 parts of a filling material, 3.5-6 parts of hydroxyl acrylic resin and 2-5 parts of an insect-resisting agent. The production method of the low-formaldehyde mildewproof urea-formaldehyde resin adhesive comprises the following steps of firstly preparing urea-formaldehyde resin, wherein the formaldehyde is fed once, and the urea is fed three times, the production of the urea-formaldehyde resin is carried outin three stages, namely pre-polymerization, polymerization and later polymerization; adding the hydroxyl acrylic resin in the stage of polymerization; and after later stage polymerization, putting the modified urea-formaldehyde resin in a planetary stirring machine, adding the adsorbent, the filling material and the insect-resisting agent to be uniformly mixed with the modified urea-formaldehyde resin, and then grinding for 20-30min by a three-roll grinder to obtain the low-formaldehyde mildewproof urea-formaldehyde resin adhesive. The low-formaldehyde mildewproof urea-formaldehyde resin adhesive produced by the method has residual urea-formaldehyde resin residue amount, is used for bonding various artificial boards, can prevent moth damage, effectively restrains the reproduction of mildew and microbes, and meanwhile can generate anions.

Description

Technical field [0001] The invention relates to a urea-formaldehyde resin adhesive, especially a urea-formaldehyde resin adhesive with good anti-mold performance and low formaldehyde residue, and a production method thereof. Background technique [0002] Wood is a natural polymer material with environmental characteristics such as vision, touch and hearing that no other material can match. With the rapid development of my country's economy and the rapid improvement of people's quality of life, people's demand for natural wood materials is increasing. In recent years, wood products such as parquet, plywood, blockboard, furniture and interior decoration materials have been used more and more widely in human living spaces. [0003] However, most wood products use formaldehyde adhesives, and the most commonly used adhesives are urea-formaldehyde resins or modified urea-formaldehyde resins. One of the raw materials for the production of urea-formaldehyde resin or modified urea-formald...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J161/32C09J11/04C09J11/06C09J11/08C08G12/40
Inventor 马云马广吴定超陈宏玲秦文雄
Owner 容县润达家具有限公司
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