A kind of reactive polyurethane hot melt adhesive and preparation method thereof
A polyurethane hot melt adhesive, reactive technology, applied in the chemical field, can solve the problems of slow curing speed, poor thermal shock resistance, poor aging resistance, etc.
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Embodiment 1
[0028] Add 21 parts of polyether polyol PPG2100 and 43 parts of polyester polyol POL-356T into the reaction kettle, vacuum dehydrate at 120°C for 2 hours, and keep the vacuum at -0.09MPa. Then cool to 80°C, add 10 parts of reactive plasticizer "Nikanol" resin and 14 parts of 4,4'diphenylmethane diisocyanate MDI while stirring, then slowly raise the temperature, control the temperature at 80°C, and fill with nitrogen at the same time Protection, reaction for 2.5 hours. After sampling and analysis, the NCO% content reaches the design value of 2.5%, then add 11 parts of terpene resin, 2 parts of latent curing agent ALT-101, and 0.2 parts of catalyst triethylenediamine. Under the condition that the temperature is 100°C, vacuumize until no air bubbles appear, then discharge, and seal the package. Obtain the PUR glue of the present invention and place it for use.
Embodiment 2
[0030] Add 10 parts of polyether polyol PPG220 and 50 parts of polyester polyol XCP-3000H into the reaction kettle, vacuum dehydrate at 110°C for 2.5 hours, and keep the vacuum at -0.08MPa. Then cool to 80°C, add 8 parts of reactive plasticizer "Nikanol" resin and 13 parts of toluene diisocyanate TDI80 / 20 while stirring, then slowly raise the temperature, control the temperature at 70°C, and fill with nitrogen protection at the same time, react for 2.5 hours . After sampling and analysis, the NCO% content reaches the design value of 2.0%, then add 6 parts of petroleum tackifying resin, 3 parts of latent curing agent ALT-101, and 0.1 part of catalyst dibutyltin dilaurate. Under the condition that the temperature is 90° C., vacuumize until no air bubbles appear, and then discharge the material and seal the package. Obtain the PUR glue of the present invention and place it for use.
Embodiment 3
[0032] Add 30 parts of polyether polyol PPG204 and 30 parts of polyester polyol POL-356T into the reactor, vacuum dehydrate at 110°C for 3.5 hours, and keep the vacuum at -0.09MPa. Then cool to 80°C, add 18 parts of reactive plasticizer "Nikanol" resin and 16 parts of 4,4'diphenylmethane diisocyanate MDI while stirring, then slowly raise the temperature, control the temperature at 80°C, and fill with nitrogen at the same time Protection, reaction for 2.5 hours. After sampling and analysis, the NCO% content reaches the design value of 2.8%, then add 10 parts of terpene tackifying resin and 10 parts of petroleum tackifying resin, 1 part of latent curing agent ALT-101, 0.1 part of catalyst dibutyltin dilaurate and three 0.3 parts of ethylene diamine. Under the condition that the temperature is 110° C., vacuumize until no air bubbles appear, and then discharge the material and seal the package. Obtain the PUR glue of the present invention and place it for use.
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