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Aldehyde-free cement for wood-based panel

A technology of adhesives and wood-based panels, applied in the field of resin adhesives, can solve problems such as endangering the health of operators, high concentration of formaldehyde, irritating eyes and respiratory system, etc.

Inactive Publication Date: 2006-12-27
DEHUA TB NEW DECORATION MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, in the process of using urea-formaldehyde resin adhesives to make wood-based panels, the concentration of formaldehyde released is high, which irritates people's eyes and respiratory system, and endangers the health of operators.

Method used

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  • Aldehyde-free cement for wood-based panel

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Embodiment Construction

[0006] Refer to attached figure 1 5-15% of polyvinyl alcohol, 8-15% of YH-complexing agent, 15-20% of oxidized starch, 8-20% of BPA cross-linking agent and 45-60% of water are taken by weight. Add the measured water and polyvinyl alcohol into the reaction kettle, heat up and dissolve, keep it at 85-80°C for 1 hour, then lower it to 65°C, add oxidized starch and YH-1 complexing agent, and adjust the pH value to 5.0-6.0 , the temperature rises to 70-75°C for heat preservation reaction, about 0.5 hours to the end of the reaction, cools down to 50°C, adds BPA crosslinking agent, heats the reaction for 40 minutes, until it is completely emulsified, adjusts the pH value to 6.0-7.0, and the temperature drops to 40°C After discharging, the formaldehyde-free adhesive for wood-based panels of the present invention is obtained. Appearance of the present invention: pale yellow homogeneous liquid without impurities. The pH value is 7.0, the viscosity is 660cp, no free formaldehyde, and t...

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Abstract

The invention discloses adhesive agent without aldehyde, comprising polyvinyl alcohol, YH- complex builder, complex builder, and BPA cross linking agent. The method comprises the following steps: feeding, adjusting pH, heating, cooling, discharging, and getting product. The invention uses polyisocyanates as curing agent. When use it, mix the host crystal and curing agent, and stir them. The invention has the advantages of non irritant odor, high strength and non formaldehyde. So the invention modifies the environment.

Description

technical field [0001] The invention relates to a resin adhesive, in particular to an adhesive used in the manufacture of wood-based panels without harmful substance formaldehyde. Background technique [0002] With the development of social economy, people's living standards are improving day by day, and the awareness of environmental protection is getting stronger and stronger. All countries in the world are paying more and more attention to environmental quality, and my country is no exception. In view of the serious impact of formaldehyde on the environment and human health, the country has made strict regulations on the amount of formaldehyde released in wood-based panel products, which was promulgated on January 1, 2002. The mandatory standard GB18580-2001 of "Formaldehyde Release Limits in Wood-Based Panels and Their Products for Interior Decoration and Renovation Materials" was promulgated. Since July 1, 2002, the market has stopped selling products that do not meet th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J129/04C09J103/02
Inventor 丁鸿敏张晓伟郑兴龙孙朝坤唐善学沈金祥吴华冲
Owner DEHUA TB NEW DECORATION MATERIAL CO LTD
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