Water-based polymer-polyurethane prepolymer preparation method and application
A polyurethane prepolymer, water-based polymer technology, applied in the direction of polyurea/polyurethane adhesives, adhesive types, adhesives, etc. The effect of increased added value and increased bond strength
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Embodiment 1
[0038] (1) Preparation of component A
[0039] Crush the recovered PET, dry the moisture to below 0.5% by mass, and sieve out solids such as sand, stones, metals, etc.; add 100kg of recycled and broken PET, 5kg of diethylene glycol, and monobutyl esterification catalyst to the reactor. Tin oxide 0.5kg, and the stirrer was turned on, alcoholysis of PET occurred with microwave radiation with output power of 500W for 3min; 10kg of succinic anhydride was added to the reactor, and microwave radiation with output power of 500W for 3min; Aqueous solution of ammonia 165kg, adjust pH to 8.0, disperse the resin to obtain PET water-based polymer emulsion, which is component A, cool to room temperature, and discharge.
[0040] (2) Preparation of component B
[0041] Blend toluene diisocyanate and castor oil at a mass ratio of 100:50, heat at 70-80°C for 100 minutes, periodically take the reactant and carry out chemical titration until the percentage of isocyanate group (NCO%) is constant...
Embodiment 2
[0044] (1) Preparation of component A
[0045] Crush the recovered PET, dry the moisture to below 0.5% by mass, and sieve out solids such as sand, stones, metals, etc.; add 100kg of recycled and broken PET, 7kg of diethylene glycol, and monobutyl esterification catalyst to the reactor. Tin oxide 0.8kg, and the stirrer was turned on, alcoholysis of PET occurred with microwave radiation with output power of 500W for 8min; succinic anhydride 15kg was added to the reactor, and microwave radiation with output power of 500W for 8min; Aqueous solution of ammonia 170kg, adjust pH to 8.0, disperse resin to obtain PET water-based polymer emulsion, which is component A, cool to room temperature, and discharge.
[0046] (2) Preparation of component B
[0047] Blend toluene diisocyanate and castor oil at a mass ratio of 100:75, heat at 80-90°C for 90 minutes, and periodically detect the reactants by infrared spectroscopy until the percentage of isocyanate groups (NCO%) is constant. Cooli...
Embodiment 3
[0050] (1) Preparation of component A
[0051] Crush the recovered PET, dry the moisture to below 0.5% by mass, and sieve out solids such as sand, stones, metals, etc.; add 100 kg of recovered and broken PET, 6 kg of diethylene glycol, and esterification catalyst monobutyl to the reactor. Tin oxide 0.7kg, and the stirrer was turned on, and the PET was alcoholysed with microwave radiation with an output power of 500W for 5 minutes; 13 kg of succinic anhydride was added to the reactor, and the microwave radiation with an output power of 500W was used for 6 minutes; Aqueous solution of ammonia 167kg, adjust pH to 8.0, make resin disperse and obtain PET water-based polymer emulsion, namely A component, cool to room temperature, discharge.
[0052] (2) Preparation of component B
[0053] Blend toluene diisocyanate and castor oil in a mass ratio of 100:60, heat at 70-80°C for 120 minutes, periodically take the reactant and carry out chemical titration until the percentage of isocya...
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Abstract
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