Formaldehyde-free adhesive based on acrylate
An acrylate and adhesive technology, applied in the direction of adhesives, acidic copolymer adhesives, adhesive types, etc., can solve the problems of not meeting the needs of the wood-based panel production process, short opening time, etc., and achieve excellent cohesive strength, The effect of good water absorption and good adhesion
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Embodiment 1
[0025] 23% sodium polyacrylate solution 48.2 parts
[0026] Ethylene-vinyl acetate copolymer emulsion 20 parts
[0027] Ammonium persulfate 0.1 part
[0028] Silane coupling agent 1.5 parts
[0029] Defoamer 0.1 part
[0030] 30 servings of wheat flour
[0031] Antiseptic bactericide 0.1 part.
[0032] First add the formula amount of sodium polyacrylate solution, ethylene-vinyl acetate copolymer emulsion, ammonium persulfate, silane coupling agent into the reaction kettle, stir for 10-15 minutes to make it evenly mixed, and then add the formula amount of defoamer and antiseptic sterilization Continue stirring for 5-10 minutes, then slowly add the wheat flour while stirring, so that the wheat flour is fully swollen and mixed until the appearance is uniform and no visible particles are visible, and then continue to stir for 10 minutes.
[0033] The open time of the obtained formaldehyde-free wood-based panel adhesive can reach 6 hours, and the type II water-resistant adhesi...
Embodiment 2
[0035] 30% calcium acrylate solution 63.25 parts
[0036] Ethylene-vinyl acetate copolymer emulsion 10 parts
[0037] Azobisisobutyronitrile 0.05 part
[0038] Silane coupling agent 1.5 parts
[0039] Defoamer 0.1 part
[0040] 20 servings of wheat flour
[0041] 5 parts bentonite
[0042] Antiseptic bactericide 0.1 part.
[0043] First add calcium acrylate solution and ethylene-vinyl acetate copolymer emulsion, azobisisobutyronitrile, silane coupling agent in the reaction kettle, stir for 10-15 minutes to make them evenly mixed, and then add the antifoaming agent and Continue to stir for 5-10 minutes, and then slowly add the mixture of wheat flour and bentonite while stirring, so that the wheat flour and bentonite are fully swollen and mixed until the appearance is uniform and there are no visible particles, and then continue to stir for 10 minutes.
[0044] The open time of the obtained formaldehyde-free wood-based panel adhesive can reach 8 hours, and the type II wate...
Embodiment 3
[0046] 30% magnesium polyacrylate solution 43.2 parts
[0047] 18% polyvinyl alcohol solution 30 parts
[0048] Azobisisobutyronitrile 0.05 part
[0049] Epoxy resin 2.5 parts
[0050] Defoamer 0.1 part
[0051] 20 servings of wheat flour
[0052] Antiseptic bactericide 0.1 part.
[0053] First add calcium polyacrylate solution, ethylene-vinyl acetate copolymer emulsion, azobisisobutyronitrile, epoxy resin in the reaction kettle, stir for 15-25 minutes to make them evenly mixed, then add the defoamer and Continue to stir for 5-10 minutes, then slowly add wheat flour while stirring, so that the wheat flour and bentonite are fully swollen and mixed until the appearance is uniform without visible particles, and then continue to stir for 10 minutes.
[0054] The obtained formaldehyde-free wood-based panel adhesive has an open time of 4 hours, a type II water-resistant adhesive strength of 1.2 MPa, and a dry strength of 2.8 MPa.
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