Surface layer polyurethane resin for waterproof and moisture permeable synthetic leather and preparation method of polyurethane resin
A waterproof and moisture-permeable, synthetic leather technology, applied in polyurea/polyurethane coatings, coatings, textiles and papermaking, etc., can solve problems such as technical deficiencies, and achieve excellent wear resistance, excellent waterproof and moisture-permeable performance effects
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Example Embodiment
[0037] Example 1
[0038] The raw materials and weights used in this example are shown in Table 1.
[0039] Table 1
[0040]
[0041] The preparation method is as follows:
[0042] (1) Mix 0.039g Chinox 1010, 100g polytetrahydrofuran ether glycol, 100g polyethylene oxide glycol, 0.1072g trimethylolpropane, 7.44g ethylene glycol, and 79.81g dimethylformamide at 60°C ;
[0043] (2) Then add 133.65g isophorone diisocyanate, heat up to 105°C, prepolymerize for 3 hours, then lower the temperature to 40°C, add 319.24g dimethylformamide and 253.94g toluene, and stir for 30 minutes;
[0044] (3) Add 47.68g isophorone diamine, react at 40°C for 5 hours, add 72.55g isopropanol and 1.72g γ-aminopropyltriethoxysilane, stir for 30 minutes and add 0.039g Chisorb 320 to obtain The surface layer polyurethane resin for waterproof and moisture-permeable synthetic leather.
Example Embodiment
[0045] Example 2
[0046] The raw materials and weights used in this example are shown in Table 2.
[0047] Table 2
[0048]
[0049] The preparation method is as follows:
[0050] (1) Combine 0.55g Chinox 1035, 300g polytetrahydrofuran propylene oxide copolyether glycol, 900g polytetrahydrofuran ethylene oxide copolyether glycol, 6g trihydroxy polyether, 28.8g butanediol, 998.88g dimethyl ethyl Mix the amide uniformly at 50℃;
[0051] (2) Then add 336.72g hexamethylene diisocyanate, heat up to 95°C, prepolymerize for 2 hours, then lower the temperature to 30°C, add 2330.72g dimethylacetamide and 1664.8g methyl ethyl ketone, and stir for 25 minutes;
[0052] (3) Add 269.26g 4,4'-diaminodicyclohexylmethane, react at 30°C for 4 hours, add 554.93g isobutanol and 6.6g γ-aminopropyltrimethoxysilane, stir for 30 minutes and add 1.85g Chisorb 292, the polyurethane resin for the surface layer of the waterproof and moisture-permeable synthetic leather can be obtained.
Example Embodiment
[0053] Example 3
[0054] The raw materials and weights used in this example are shown in Table 3.
[0055] table 3
[0056]
[0057] The preparation method is as follows:
[0058] (1) Combine 0.2g Chinox 1010, 200g polytetrahydrofuran ether glycol, 360g polytetrahydrofuran ethylene oxide copolyether glycol, 0.86g trihydroxypolyether, 20.25g butanediol, and 408.34g dimethylformamide in 60 ℃ mix well;
[0059] (2) Then add 267.36g isophorone diisocyanate, heat up to 95°C, prepolymerize for 3 hours, then lower the temperature to 30°C, add 1225.02g dimethylformamide and 466.68g ethyl acetate, and stir for 25 minutes ;
[0060] (3) Add 141.99g 4,4'-diaminodicyclohexylmethane, react at 40°C for 4 hours, add 233.34g isopropanol and 4.38g γ-aminopropyltriethoxysilane, stir for 30 minutes and add 4.97g Chisorb 292 can obtain the surface layer polyurethane resin for waterproof and moisture permeable synthetic leather.
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