Preparation method of pyrolysis oil resorcinol formaldehyde resin adhesive for wood structure building materials

Abstract

The present invention relates to a preparing method of pyrolytic tar resorcinol formaldehyde resin tackifier for use in timberwork building materials, and is thus the timberwork building material and tackifier domain. Add water and sodium hydroxide into the reaction kettle, add the resorcinol while stirring and after it dissolves, add the first formaldehyde solution; add the biomass pyrolytic tar to absolute methanol to make pyrolytic tar - methanol solution; add first pyrolytic tar- methanol solution and the second methanol solution to the reaction kettle and stir it evenly till it fully reacts and then add the second pyrolytic tar - methanol solution and another 10-20 parts of methanol solution, stir it evenly and it warms up and reacts till the mixture reaches the required viscosity, thus the tackifier base is obtained; prior to the use, add paraformaldehyde and filler wood flour into the base to get the pyrolytic tar resorcinol formaldehyde resin tackifier for use in timberwork building materials. The tackifier prepared using this method uses renewable raw materials and it not only costs less but also has good invasion and strong adhesion to the wood.

Description

technical field [0001] The invention relates to a preparation method of a pyrolysis oil resorcinol formaldehyde resin adhesive for wood structure building materials, belonging to the field of wood structure building materials and adhesives. Background technique [0002] Wood has natural low-carbon and environmental protection characteristics. Compared with steel structures and brick-concrete structures, wood structures have a unique function of regulating temperature and humidity in the living environment, and are convenient for construction and have a short construction period. Therefore, they are widely used in residential buildings, schools, office buildings, gymnasiums, There are more and more applications in large public buildings such as exhibition halls, landscape tourism buildings and some industrial buildings. With the rapid development of wood structure construction and other industries, the demand for adhesives for wood structure building materials with high bondi...

AI Technical Summary

Problems solved by technology

However, due to the high price of resorcinol raw materials and the fact that the main raw materials are derived from petrochemical resources, the use range and application fields of this adhesive are limited.

Researchers have tried to use phenol, rosin, cardanol, etc. to modify resorcinol formaldehyde resin, but because the modified raw materials are relatively expensive, resorcinol formaldehyde resin adhesives can reduce production costs, improve environmental performance and There is a lot of room for development in optimizing the production process

[0004] Biomass pyrolysis oil is a liquid product obtained by pyrolysis and liquefaction of agricultural and forestry wastes as raw materials. It is rich in phenols, aldehydes, ketones, acids, esters, and pyrolytic lignin. The raw materials come from a wide range of sources. , environmental protection and low production cost, have been successfully applied in phenolic resin (ZL200910088172.8), urea-formaldehyde resin (ZL201210135672.4) and starch adhesive (ZL201310065226.5). The application of adhesives for wood structure building materials has not been reported yet

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