Green, safe and environmentally friendly process for industrialized continuous large-scale production of aldehyde-free water-based adhesives

Abstract

The invention relates to a green, safe and environment-friendly process for industrialized continuous large-scale production of aldehyde-free water-based adhesives, comprising: monomers with carbon-carbon unsaturated double bonds and acid anhydride groups, at least one other carbon-carbon unsaturated double The monomer of the bond is used as the raw material, and the polymerization reaction is carried out with the participation of the solvent and the initiator; the polymerization reaction liquid is subjected to solid-liquid separation under the action of high-temperature inert carrier gas, the solvent is vaporized, and returned to the polymerization reaction after condensation; the solid material is used as the polymer The intermediate is subjected to a gas-solid reaction with the mixed gas of ammonia and air to obtain a solid formaldehyde-free water-based adhesive product. The green, safe and environment-friendly production process of the aldehyde-free water-based adhesive provided by the present invention has the advantages of green, safe, environmental protection, simple process, mild reaction conditions, good atom economy, etc., and can realize the automatic control of the whole process, save labor, and is suitable for non-toxic Continuous industrial production of aldehyde water-based adhesives.

Description

Green, safe and environmentally friendly process for industrialized continuous large-scale production of aldehyde-free water-based adhesives technical field The present invention relates to the technical field of adhesive for wood-based panels, specifically, relate to a kind of aldehyde-free water-based adhesive green Color safety and environmental protection production process Background technique In current wood-based panel production, "trialdehyde glue" (urea-formaldehyde resin, phenolic resin and trialdehyde resin) prepared with formaldehyde as raw material Polycyanamide formaldehyde resin) occupies a large proportion, more than 80%. The board using "trialdehyde glue" will release free formaldehyde for a long time, Pollute the indoor environment and seriously threaten the health of residents. With the improvement of people's living standards, the consumption rationale for green ecology More and more people agree and pay more and more attention to the environmen...

AI Technical Summary

Problems solved by technology

However, during the polymer preparation process, a combination of solvent precipitation and centrifugation or filtration separation is used to produce a large amount of solid-liquid mixed solvent, and the separation and recovery pressure is relatively high. At the same time, the mother liquor after centrifugation or filtration contains a considerable proportion of low molecular weight polymers. It cannot be reused, resulting in a large amount of hazardous waste, which does not conform to the reaction principle of atomic economy and the production goal of green chemistry, and is not suitable for industrial continuous large-scale production

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