Environment-friendly polyurethane water shutoff material and preparation method thereof
A polyurethane, environment-friendly technology, applied in the field of environment-friendly polyurethane water blocking materials and its preparation, can solve problems such as poor reinforcement and complicated operation, and achieve low steam pressure, good permeability, adjustable foaming speed and curing speed Effect
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[0036] Example 1
[0037] Preparation of polyurethane prepolymer: 15 kg of polyether polyol a (functionality 3, hydroxyl value 370), polyether polyol b (functionality 2, hydroxyl value 380) 5 kg, polyether polyol c (functionality 2.7, Hydroxyl value 167) 2kg, vacuum dehydration at 120°C for 2.5 hours, cooling to 45°C, adding to the synthesis reactor, nitrogen protection, adding 0.1kg of water remover ALT-201 (Anxiang Elite Chemical), while stirring Slowly add 50kg of polyphenyl polymethylene polyisocyanate PM200 (Yantai Wanhua), heat up to 80°C, react for 2.5 hours, the synthesis reaction is completed, and the NCO content in the system is no longer reduced after sampling, and the polyurethane prepolymer can be obtained. body;
[0038] Preparation of additives: add 3 kg of dibutyl phthalate, 5 kg of tributyl citrate, 3 kg of tris (1-chloro-2-propyl) phosphate, 0.3 kg of dibutyl tin dilaurate, and bismorpholino diethyl 0.5kg of base ether, 1kg of H-3625 (Zhongshan Shandong Jun Chem...
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[0042] Example 2
[0043] Preparation of polyurethane prepolymer: 25kg of polyether polyol a (functionality 3, hydroxyl value 450), polyether polyol b (functionality 2, hydroxyl value 280) 10kg, polyether polyol c (functionality 2. Hydroxyl value 110) 5kg, vacuum dehydration at 110°C for 3 hours, cooling to 40°C, adding to the synthesis reactor, nitrogen protection, adding water remover ALT-201 (Anxiang Elite Chemical) 0.5kg, While stirring, slowly add 50kg of polyphenyl polymethylene polyisocyanate PM200 (Yantai Wanhua), 25kg of polyphenyl polymethylene polyisocyanate M20S (BASF), heat to 85°C, react for 2.0 hours, and the synthesis reaction is complete After the NCO content in the sampling detection system is qualified, the polyurethane prepolymer can be obtained;
[0044] Additives: add 10kg of dioctyl phthalate, 15kg of triethyl citrate, 5kg of triethyl phosphate, 1kg of bismorpholinyl diethyl ether, 1kg of stannous octoate, 3kg of H-3971 (Zhongshan Shandong Jun Chemical Indus...
Example Embodiment
[0048] Example 3
[0049] Polyurethane prepolymer is made of the following parts by weight of raw materials: 15-25 parts of polyether polyol a, 5-10 parts of polyether polyol, 2-5 parts of polyether polyol, 0.1-0.5 parts of water scavenger, isocyanate 50-75 copies;
[0050] Polyether polyol a has a functionality of 3-4 and a hydroxyl value of 300-500,
[0051] Polyether polyol b has a functionality of 2-3 and a hydroxyl value of 200-400,
[0052] Polyether polyol c has a functionality of 2-3 and a hydroxyl value of 100-200;
[0053] The additives are made of the following raw materials in parts by weight: 3-10 parts of plasticizer, 5-15 parts of diluent, 3-5 parts of flame retardant, 0.3-2 parts of catalyst and 1-3 parts of surfactant.
[0054] Preparation of polyurethane prepolymer: Polyether polyol a (functionality 4, hydroxyl value 500) 20kg, polyether polyol b (functionality 3, hydroxyl value 200) 8kg, polyether polyol c (functionality 3, Hydroxyl value 200) 4kg, vacuum dehydrated ...
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