The resorcinol resin needs to be mixed with POM powder to produce the last adhesive used to glue the sheet. Usually, how much harmful substance will be produced in industrial production?
Resorcinol formaldehyde resin slurry by 1 mol 0.6~0.66 Moore resorcinol and formaldehyde, reaction in the presence of acid or alkaline catalyst, without catalyst, required reaction at 100 to 150 DEG C, cooling after dilution with ethanol, stabilizing the. Before use, add formaldehyde (paraformaldehyde), so that the ratio of phenol to aldehyde is 1:1 ~ 2, which can be cured at room temperature. The adhesive is water-soluble and is most stable at pH 3~4 and the gelation rate is fastest when pH is 6~10. As filler, there are sawdust, walnut shell powder, etc., as modifier or additive of corn protein, cement, polyvinyl alcohol and so on.
Resorcinol formaldehyde resin; formaldehyde and resorcinol polymer 1,3Resorcinol is much more hydroxyl than phenol, so it reacts faster with formaldehyde, even at room temperature.
For wood adhesion, excellent adhesion strength, and water resistance, durability and heat resistance characteristics. And the advantages of room temperature curing. Therefore, in water resistance requirements of wood processing and wood bonding, such as water resistant plywood, water resistant wood chip board, wooden keel and senior ski, and so on, has a very important position.
