A formaldehyde-free bean pulp protein adhesive and a preparing method thereof
An aldehyde-free soybean meal and adhesive technology, which is used in the preparation of protein adhesives, animal glue or gelatin, and adhesives, etc. Adhesive wood-based panel formaldehyde release and other issues, to achieve the effect of increasing the number and type, increasing the type and quantity, and reducing internal stress
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Embodiment 1
[0048] A kind of aldehyde-free soybean meal protein adhesive, is made up of the raw material of following weight:
[0049] Demineralized water 70 kg;
[0050] Defatted soy protein powder 35 kg;
[0051] Trypsin 0.1kg;
[0052] Soybean chitinase 0.1kg;
[0054] Triethylenetetramine 0.2kg;
[0055] Glycerol triglycidyl ether 0.3kg;
[0056] Curing agent 0.6kg.
[0057] The preparation method of the soybean meal protein adhesive in this embodiment: Stir the prepared soybean meal protein adhesive prepolymer and the curing agent at room temperature for 10 minutes, stir well and then use.
Embodiment 2
[0059] A kind of aldehyde-free soybean meal protein adhesive, is made up of the raw material of following weight:
[0060] Demineralized water 70 kg;
[0061] Defatted soy protein powder 35 kg;
[0062] Trypsin 0.3kg;
[0063] Soybean chitinase 0.3kg;
[0065] Triethylenetetramine 0.5kg;
[0066] Glycerol triglycidyl ether 0.8kg;
[0067] Curing agent 1kg.
Embodiment 3
[0069] A preparation method of formaldehyde-free soybean meal protein adhesive, comprising the following steps:
[0070] (1) According to the weight ratio in the above-mentioned formaldehyde-free soybean meal protein adhesive, weigh each component and prepare raw materials;
[0071] (2) Evenly disperse soybean meal powder, water, trypsin and chitinase in the dispersion medium water, raise the temperature of the water bath to 40°C and stir for 30 minutes, then raise the temperature to 80°C for 10 minutes to inactivate the enzyme;
[0072] (3) Add sodium periodate to the mixture obtained in step 3, raise the temperature to 50°C, adjust the pH value to 4.0, react for 3 hours, add triethylenetetramine and react at 50°C for 2 hours, then raise the temperature to 90°C, and react for 5 hours ;
[0073] (4) Heating the mixture in step 3 to 80°C, adjusting the pH value to 10, adding glycerol triglycidyl ether to react for 1 hour, cooling down and discharging, and obtaining the formald...
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