Application of hyperbranched polyamide in removing formaldehyde in urea-formaldehyde resin adhesive

Abstract

The invention relates to the technical field of removal of formaldehyde in urea-formaldehyde resin adhesives for artificial boards, particularly preparation and application of hyperbranched polyamide. The hyperbranched polyamide is synthesized by the following steps: carrying out reaction on butanedioic anhydride and diethylenetriamine used as raw materials to generate two AB2 monomers, and carrying out reaction on the two AB2 monomers under certain reaction conditions to obtain the hyperbranched polyamide. The hyperbranched polymer has multiple branches and multiple terminal amino groups, and thus, has multiple reaction active sites and can sufficiently react with formaldehyde. The hyperbranched polymer has low viscosity, has the three-dimensional structure, does not have intermolecular entanglement, and thus, can implement high utilization value after being added into the urea-formaldehyde resin adhesive. The hyperbranched polyamide is an environment-friendly formaldehyde catcher, thereby reducing the hazards to the human health and satisfying the requirements for national green material production.

Description

technical field [0001] The invention relates to the technical field of formaldehyde removal in urea-formaldehyde glue, in particular to the synthesis and application of an amino-terminated hyperbranched polyamide. Background technique [0002] Urea-formaldehyde resin adhesive has good performance, relatively low price, easy to use, and high bonding strength, so it is widely used in the manufacture of fiberboard, plywood and other wood-based panels and wood processing industries, and has become the largest amount of adhesives. Variety. Urea-formaldehyde resin and its modified products account for about 90% of the total amount of adhesives. However, there is a problem of formaldehyde release in the manufacture and use of wood-based panels made of urea-formaldehyde resin, which seriously pollutes the environment and damages the physical and mental health of producers and consumers. As people have higher and higher requirements on the living environment, it is imperative to us...

AI Technical Summary

Problems solved by technology

[0005] Aiming at some problems of the traditional formaldehyde scavenger itself, the present invention introduces a hyperbranched structure mainly because the hyperbranched polymer has a three-dimensional network structure, many branches, rich active groups, and has good compatibility with polymers. It solves some problems caused by the traditional formaldehyde scavenger with small molecular weight and few active groups, and effectively reduces the content of free formaldehyde in urea-formaldehyde resin adhesives.

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