Low density polyurethane micropore elastomer added with thermal foamable microsphere and preparation thereof
A microporous elastomer and thermal foaming technology, which is applied in applications, shoe soles, clothing, etc., can solve the problems of unreachable mechanical properties and large molding shrinkage of materials, and achieve excellent processing performance and mechanical properties, small molding shrinkage, and smooth surface whole effect
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Embodiment 1
[0027] Prepare component A, weigh respectively: polyester polyol A1 60 kg, polyester polyol A2 40 kg, chain extender ethylene glycol 7.7 kg, crosslinking agent glycerin 0.15 kg, foam stabilizer DC193 (U.S., Air Products Produced by the company, commercially available) 0.2 kg, thermal foaming microspheres 1.0 kg, foaming agent water 0.5 kg, F-141b (Zhejiang Hangzhou Fushite Chemical Co., Ltd., commercially available) 1.5 kg and catalyst triethylenediamine 1.25 kg . Place the weighed raw materials in a reaction kettle at 20-50°C, mix them well for 2-4 hours, discharge them, and keep them sealed.
[0028] To prepare component B, weigh: 100 kg of diphenylmethane diisocyanate, 45 kg of polyester polyol B1, 5.0 kg of polyether polyol and 1.92 g of phosphoric acid as a side reaction inhibitor. Put the weighed raw materials in the reaction kettle, react at 60-80°C for 2-3 hours, remove air bubbles in a vacuum, lower the temperature to 40-45°C, control the free-NCO content to 18-22% b...
Embodiment 2
[0032] Prepare component A, weigh respectively: polyester polyol A1 90 kg, polyester polyol A2 10 kg, chain extender ethylene glycol 15 kg, crosslinking agent glycerin 0.4 kg, foam stabilizer DC3043 (U.S., Air Products Produced by the company (commercially available) 1.5 kg, 20 kg of thermal foaming microspheres, 0.2 kg of blowing agent water, 0.3 kg of F-141b and 1.0 kg of catalyst triethylenediamine. Place the weighed raw materials in a reaction kettle at 20-50°C, mix them well for 2-4 hours, discharge them, and keep them sealed.
[0033] To prepare component B, weigh: 100 kg of diphenylmethane diisocyanate, 40 kg of polyester polyol B1, 15 kg of polyether polyol and 4.5 g of phosphoric acid as a side reaction inhibitor. Put the weighed raw materials in the reaction kettle, react at 60-80°C for 2-3 hours, remove air bubbles in a vacuum, lower the temperature to 40-45°C, control the free-NCO content to 18-22% by weight, and discharge , sealed and preserved.
[0034] The pre...
Embodiment 3
[0037] Prepare component A and weigh separately: polyester polyol A1 65 kg, polyester polyol A2 35 kg, chain extender ethylene glycol 8.7 kg, cross-linking agent glycerin 0.15 kg, foam stabilizer DC193 0.2 kg, thermal hair 1.5 kg of bubble microspheres, 0.5 kg of blowing agent water, 0.2 kg of F-141b and 1.25 kg of catalyst triethylenediamine. Place the weighed raw materials in a reaction kettle at 20-50°C, mix them well for 2-4 hours, discharge them, and keep them sealed.
[0038] To prepare component B, weigh: 100 kg of diphenylmethane diisocyanate, 30 kg of polyester polyol B1, 25 kg of polyether polyol and 0.45 g of phosphoric acid as a side reaction inhibitor. Put the weighed raw materials in the reaction kettle, react at 60-80°C for 2-3 hours, remove air bubbles in a vacuum, lower the temperature to 40-45°C, control the free-NCO content to 18-22% by weight, and discharge , sealed and preserved.
[0039] The preparation process is the same as in Example 1.
[0040] The...
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