Waterproof reinforcing agent for urea-formaldehyde adhesive for boiling-resistant artificial board

Abstract

A waterproof reinforcing agent for a urea-formaldehyde adhesive for a boiling-resistant artificial board comprises the components as follows: 30% of aluminum sulfate, 20% of calcium hydroxide, 20% of stearic acid, 5% of potassium dichromate, 20% of aluminum silicate and 5% of 1,2,3-triphenyl cyclopropane. According to the waterproof reinforcing agent, in a condensation process of formaldehyde and urea, hydrophilic groups such as OH-, urea bonds and the like can be removed effectively and radically in a condensation process of the urea-formaldehyde adhesive under the action of the temperature and acid-base catalysts, the defect that application effects cannot be realized due to the fact that prepared traditional urea-formaldehyde adhesives are modified by melamine to be waterproof or become waterproof through paraffin is overcome, the waterproof performance is realized during production of the urea-formaldehyde adhesive, fm copolymers are produced through cross-linking reactions, effects of 3N heterocyclic rings in the urea bonds and MUF (melamine-urea-formaldehyde) copolymers are eliminated, and the dosage of the melamine of the traditional modified urea-formaldehyde adhesives can be saved by 60%.

Description

technical field [0001] The title of the invention relates to a new technology to replace melamine-modified urea-formaldehyde resin glue, and specifically relates to a boiling-resistant artificial urea-formaldehyde resin glue that can greatly reduce the amount of melamine in urea-formaldehyde resin glue by 60%, low cost, reliable quality, good water resistance, and strong boiling resistance. Board urea-formaldehyde glue waterproof enhancer. Background technique [0002] Usually, phenolic resin glue is used to make plywood people's board, because it is expensive, more than 7,000 yuan per ton, so the product price is high and has no market competitiveness. Manufacturers use polyvinyl alcohol melamine modified urea-formaldehyde resin glue instead of phenolic Resin glue produces building templates, and the cost of resin glue per ton is 2,000 yuan, which reduces production costs. Due to the price increase of melamine, the current market price is as high as 13,000 yuan / t. The modi...

AI Technical Summary

Problems solved by technology

Due to the price increase of melamine, the current market price is as high as 13,000 yuan / t. The modified urea-formaldehyde resin glue produced by polyvinyl alcohol melamine consumes a large amount of melamine. 150kg of melamine is used per ton of formaldehyde, and the cost of resin glue per ton is as high as 2,800 yuan.

[0003] At present, the traditional method is based on the principle of modifying and sealing the hydrophilic group of urea-formaldehyde glue with polyvinyl alcohol, melamine and paraffin, which is not only expensive, but also fails to achieve the waterproof application effect of wood-based panels.

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