Quick-drying high-strength carpenter's glue and preparation method thereof
A wood glue, high-strength technology, applied in the direction of polymer adhesive additives, non-polymer adhesive additives, monocarboxylate copolymer adhesives, etc., can solve problems such as complex production processes, and achieve adhesion High strength, good water resistance, good creep resistance
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[0061] A preparation method of quick-drying high-strength wood glue, comprising the following steps:
[0062] Step 1, prepare raw materials;
[0063] Step 2. Add deionized water and antifreeze to the reaction kettle, stir slowly and add polyvinyl alcohol powder, thickener, and plasticizer, and wait for 20-30 minutes to fully infiltrate the polyvinyl alcohol powder;
[0064] Step 3. Next, pass steam while stirring to raise the temperature of the mixture to 60°C to swell the PVA. After adding half of the defoamer, raise the temperature to 95°C, keep the temperature constant for 30-60 minutes, and stir until the solution is uniform;
[0065] Step 4, cool down while stirring, and cool down to 55 o C. Add the remaining half of the defoamer, slowly add polyvinyl acetate emulsion, stir for 10-30 minutes, add water-based polyurethane, stir for another 10-30 minutes, add silicone modifier and filler, and stir for 10-30 minutes;
[0066] Step 5. Add surfactant, cool down to below 50 d...
Embodiment 1
[0070] Step 1, prepare raw materials according to the following weight percentages:
[0071] Deionized water: 18.9%, polyvinyl acetate emulsion: 60%, polyvinyl alcohol (PVA): 4%, silane coupling agent: 0.5%, dipropylene glycol dibenzoate: 1.0%, xanthan gum: 0.8 %, glycerin: 3.0%, BIT: 0.20%, defoamer: 0.3%, surfactant: 0.3%, coalescent: 1%, waterborne polyurethane: 8%, silica 2%;
[0072]Step 2, add deionized water and glycerin (antifreeze) in the reactor, slowly stir and add polyvinyl alcohol powder, xanthan gum (thickener), dipropylene glycol dibenzoate (plasticizer), Wait for 20 minutes to fully infiltrate the polyvinyl alcohol powder;
[0073] Step 3. Next, pass steam while stirring to raise the temperature of the mixed solution to 60°C to swell the PVA. After adding half of the defoamer, raise the temperature to 95°C, keep the temperature constant for 30 minutes, and stir until the solution is uniform;
[0074] Step 4, cool down while stirring, and cool down to 55 o C,...
Embodiment 2
[0078] Step 1, prepare raw materials according to the following weight percentages:
[0079] Deionized water: 16.9%, polyvinyl acetate emulsion: 60%, polyvinyl alcohol (PVA): 4%, silane coupling agent: 0.5%, dipropylene glycol dibenzoate: 1.0%, xanthan gum: 0.8 %, glycerin: 3.0%, BIT: 0.20%, defoamer: 0.3%, surfactant: 0.3%, coalescent: 1%, waterborne polyurethane: 10%, kaolin 2%;
[0080] Step 2, add deionized water and glycerin (antifreeze) in the reactor, slowly stir and add polyvinyl alcohol powder, xanthan gum (thickener), dipropylene glycol dibenzoate (plasticizer), Wait for 30 minutes to fully infiltrate the polyvinyl alcohol powder;
[0081] Step 3. Next, pass steam while stirring to raise the temperature of the mixed solution to 60°C to swell the PVA. After adding half of the defoamer, raise the temperature to 95°C, keep the temperature constant for 30 minutes, and stir until the solution is uniform;
[0082] Step 4, cool down while stirring, and cool down to 55 o ...
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