A waterproof and moisture-permeable polyurethane material and its preparation method
A polyurethane material, waterproof and moisture-permeable technology, which is applied in the field of polyol-modified silica hybrid polyurethane materials and its preparation, can solve the problems of water-based intelligent waterproof and moisture-permeable polyurethane with few literature reports, and achieve a strong spatial network structure, Enhanced water resistance and low production cost
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Embodiment 1
[0029] 1. Synthesis of Ethylene Glycol Modified Nano Silica
[0030] In a 100 mL three-necked flask, add 2 g of dry commercially available silica with a particle size of 40 nm, 20 mL of dry toluene and 20 g of toluene diisocyanate. in N 2 Under atmosphere, the mixture was ultrasonically dispersed for 20 min. in N 2 Stir and react at 50°C for 10 h under protection, then cool to room temperature, wash and filter with suction to obtain toluene diisocyanate-modified nano-silica. Get 2g of modified nano-silica in a 100mL two-necked flask, add 6g of ethylene glycol, and 2 Stir the reaction at 50°C for 10 h under protection, then cool to room temperature, wash and filter with suction to obtain the product.
[0031] 2. Synthesis of Ethylene Glycol-Modified Nano-Silica Hybrid Polyurethane
[0032] Add 100g of butanediol adipate diol and 2.6g of 1,6-hexanediol into a 1000ml three-necked flask, distill and stir under reduced pressure at 90°C for 30min to remove water vapor. Add 60 g ...
Embodiment 2
[0041] 1. Synthesis of Propylene Glycol-Modified Nano Silica
[0042] In a 100 mL three-necked flask, 2 g of dry commercially available silica with a particle size of 100 nm, 20 mL of dry toluene and 70 g of diphenylmethane diisocyanate were added. in N 2 Under atmosphere, the mixture was ultrasonically dispersed for 20 min. in N 2 Stir and react at 50°C for 10 h under protection, then cool to room temperature, wash and filter with suction to obtain nano-silica modified with diphenylmethane diisocyanate. Get modified nano-silica 2g in 100mL two-necked flask, add 7g 1,3-propanediol, in N 2 Stir the reaction at 90°C under protection for 7h, then cool to room temperature, wash and filter with suction to obtain the product.
[0043] 2. Synthesis of Propylene Glycol-Modified Nano-Silica Hybrid Polyurethane
[0044] Add 100g of polyoxyethylene glycol and 2.6g of 1,6-hexanediol into a 1000ml three-necked flask, distill and stir under reduced pressure at 90°C for 30min to remove ...
Embodiment 3
[0046] 1. Synthesis of Butanediol-Modified Nano Silica
[0047] In a 100 mL three-necked flask, add 2 g of dry commercially available silica with a particle size of 100 nm, 20 mL of dry toluene and 30 g of toluene diisocyanate. in N 2 Under atmosphere, the mixture was ultrasonically dispersed for 20 min. in N 2 Stir and react at 50°C for 10 h under protection, then cool to room temperature, wash and filter with suction to obtain nano-silica modified with toluene diisocyanate. Get modified nano-silica 2g in a 100mL two-necked flask, add 20g1,4-butanediol, in N 2 Stir the reaction at 60°C for 10 h under protection, then cool to room temperature, wash and filter with suction to obtain the product.
[0048] 2. Synthesis of Butanediol-Modified Nano-Silica Hybrid Polyurethane
[0049] Add 100g of polyoxypropylene diol and 2.6g of 1,6-hexanediol into a 1000ml three-necked flask, and distill and stir under reduced pressure at 90°C for 30min to remove water vapor. Add 60 g of but...
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