Preparation method of adhesive for making board from straws

[0020] Add 20g of diphenylmethane diisocyanate MDI, 10g of polyether polyol NJ-330 and 10g of acetone into a 500mL four-neck flask equipped with a stirrer, reflux condenser, thermometer and feeding device, stir well to dissolve it, Raise the temperature of the system to 65°C, add 0.02g of T-12 catalyst, raise the temperature of the system to 90°C, react for 1h and then cool down to 50°C, add 10g of hydroxypropyl methacrylate (HPMA) for capping, and stir for 3h , cooled to 35°C. Add 5 g of trifluorooctyl methacrylate monomer to the above system, raise the temperature to 80°C for reaction, add 0.05 g of azobisisobutyronitrile AIBN initiator, and react for 0.5 h. Obtain a special adhesive (MGJNJ-1) that can be used for crop straw board making.

[0022] Add 20g of diphenylmethane diisocyanate MDI, 20g of polyether polyol NJ-330 and 20g of acetone into a 500mL four-necked bottle equipped with a stirrer, reflux condenser, thermometer and feeding device, stir fully to dissolve it, Raise the temperature of the system to 65°C, add 0.03g of T-12 catalyst, raise the temperature of the system to 90°C, react for 3 hours and then cool down to 50°C, add 12g of hydroxypropyl methacrylate (HPMA) for capping, and stir for 3 hours , lower the temperature to 35°C, add 7.5g of dodecafluoroheptyl acrylate monomer to the above system, raise the temperature to 80°C for reaction, add 0.15g of azobisisobutyronitrile AIBN initiator, and react for 1h. Obtain special adhesive (MGJNJ-2) which can be used for crop straw board making.

[0024] Add 20g of diphenylmethane diisocyanate MDI, 30g of polyether polyol NJ-330 and 30g of acetone into a 500mL four-neck flask equipped with a stirrer, reflux condenser, thermometer and feeding device, stir fully to dissolve it, Raise the temperature of the system to 65°C, add 0.04g of T-12 catalyst, raise the temperature of the system to 90°C, react for 2.5h and then cool down to 50°C, add 14g of hydroxypropyl methacrylate (HPMA) for capping, and stir for 3h Afterwards, cool down to 35°C, add 10g of dodecafluoroheptyl methacrylate monomer to the above system, raise the temperature to 80°C for reaction, add 0.02g of azobisisobutyronitrile AIBN initiator, and react for 1.5h. Obtain a special adhesive (MGJNJ-3) that can be used to make boards from crop straw.