Special high-temperature resistant waterproof air and moisture permeable resin for coating printing and preparation method thereof
A waterproof, breathable and high temperature resistant technology, applied in textiles, papermaking, fiber processing, etc., can solve the problems of easy precipitation, poor mechanical properties, etc., and achieve the effect of good reactivity, good compatibility and soft paint film
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Embodiment 1
[0028] 180 parts by weight of polypropylene glycol and polyethylene glycol with a molecular weight of 2000, the mass ratio of the two is 1.5:1, 40 parts by weight of HDI and IPDI are a mixture of 1:1 by weight, 50 parts by weight of toluene and two A mixture of methyl acetamide with a weight ratio of 1:1 is added dropwise with 0.1% organic bismuth by the total weight of the above mixture, and 10 parts by weight of 1,4-butanediol chain extender is added, and the above materials are mixed and reacted at 65°C for 1 hour to obtain Prepolymer, then add the dihydroxy-heptaphenyl cage silsesquioxane of 7% by weight of the prepolymer to react for 4h, then add 0.5 parts by weight of methanol terminator, 2 parts by weight of UV-327 stabilizer, use toluene Adjust the material to a solid content of 30% with a solvent with a weight ratio of 1:1 to ethyl acetate, the viscosity of the material is 60000cps / 25°C, and the molecular weight is 50000g / mol. Stir evenly and let it cool down.
[002...
Embodiment 2
[0031] A mixture of 180 parts by weight of polypropylene glycol and polyethylene glycol with a molecular weight of 3000 and a mass ratio of 1.5:1. 44 parts by weight of HDI and IPDI in a weight ratio of 1:1. 50 parts by weight of toluene and dimethylacetamide 1:1 mixture, add 0.1% organic bismuth by weight of the above mixture, 1 part by weight of 1,4 butanediol chain extender, mix the above materials and react at 65°C for 1h , to obtain a prepolymer, then add 10% of the weight of the prepolymer dihydroxy-heptaphenyl cage silsesquioxane, react at 65°C for 4h, add 0.5 parts by weight of methanol terminator, 2 parts by weight of UV-531 to stabilize agent, with toluene and ethyl acetate at a weight ratio of 1:1 to adjust the solid content of the material to 30%, the viscosity of the material to 80000cps / 25°C, and the molecular weight to 60000g / mol. Stir evenly and let it cool down.
[0032] The material prepared in Example 2 was coated according to the method of Example 1, and t...
Embodiment 3
[0034] 220 parts by weight of molecular weight are polypropylene glycol and polyethylene glycol of 3000, the mass ratio of the two is 1:3, 43 parts by weight of HDI and IPDI mixture of 1:2 by weight, 50 parts by weight of toluene and diethylene glycol A 1:1 mixture of methyl acetamide, add 0.1% organic bismuth by weight of the above mixture dropwise, 5 parts by weight of neopentyl glycol chain extender, mix the above materials and react at 65°C for 1 hour to obtain a prepolymer, and then add Dihydroxy-heptaphenyl cage silsesquioxane with 10% weight of the prepolymer was reacted at 65° C. for 5 h, and 0.5 parts by weight of methanol terminator and 2 parts by weight of UV-510 stabilizer were added in a weight ratio of 1: 1 Toluene and ethyl acetate are adjusted to a material with a solid content of 30%, a viscosity of 95,000 cps / 25°C, and a molecular weight of 80,000 g / mol. Stir evenly and let it cool down.
[0035] The material prepared in Example 3 was coated according to th...
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