Blocked high-temperature resistant integrated solvent-free polyurethane resin for leather, and preparation method and application thereof
A solvent-free polyurethane and high-temperature-resistant technology, which is applied in polyurea/polyurethane coatings, textiles, papermaking, and coatings, can solve the problems that are unfavorable for the transformation and development of synthetic leather manufacturers, and achieve improved production operability, simple and convenient processes, and The effect of saving production cost
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Embodiment 1
[0045] Embodiment 1 (sealing agent is 3-hydroxyquinoline)
[0046] 20.00kg of polyether ester polyol-toluene diisocyanate prepolymer (number average molecular weight is 10000, functionality is 2), 73.35kg of polyethylene glycol propylene glycol phthalate diol (number average molecular weight is 1000) , 1.65kg of poly(ethylene glycol) glycerol phthalate polyol (functionality is 2.80, number average molecular weight is 280), heated to 120 ℃, dehydration under -0.01MPa vacuum condition for 6h, after Cool down to 30°C, add 2.10kg of ethylene glycol, 0.90kg of trimethylolpropane, 0.70kg of silicone foam stabilizer, 0.30kg of deionized water, 0.65kg of ultraviolet absorber UV-320, 0.30kg of Light stabilizer 292, 0.05kg of antioxidant 245 and 0.30kg of organotin metal catalyst were mixed and stirred for 2 hours, and the hydroxyl value and moisture content were detected. When the hydroxyl value reached 161.8mgKOH / g and the moisture content was 0.3%, resin A was prepared Components, s...
Embodiment 2
[0049] Embodiment 2 (sealing agent is sodium bisulfite)
[0050] 35.00kg of polyether ester polyol-isophordione polyisocyanate prepolymer (number average molecular weight is 10000, functionality is 4), 58.00kg of polybutylene glycol isophthalate ( The number average molecular weight is 2000), 2.00kg of polydiethylene glycol glycerol isophthalate (functionality 2.05, number average molecular weight is 1000), heated to 140 ° C, dehydrated under vacuum conditions of -0.06MPa After 5 hours, cool down to 50°C, add 2.47kg of 1,4-butanediol, 0.13kg of trimethylolpropane, 0.30kg of silicone foam stabilizer, 0.30kg of deionized water, and 0.45kg of ultraviolet absorber UV -320, 0.36kg of light stabilizer 292, 0.09kg of antioxidant 245 and 0.90kg of organic tin metal catalyst were mixed and stirred for 2 hours, and the hydroxyl value and moisture content were detected. When the hydroxyl value reached 93.8mgKOH / g and the moisture content was 0.3%. , sealed and packaged to obtain resin c...
Embodiment 3
[0053] Embodiment 3 (sealing agent is hexanethiol)
[0054] 33.40kg of polyether ester polyol-diphenylmethane diisocyanate prepolymer (number average molecular weight is 30000, functionality is 3), 40.00kg of polyethylene terephthalate diol (number Average molecular weight is 3000), 15.00kg polydiethylene glycol trimethylolpropane isophthalate polyol (functionality is 2.3, number average molecular weight is 3000) is heated up to 130 ℃, the vacuum of-0.04MPa Dehydrate under the conditions for 5 hours, then lower the temperature to 40°C, add 4.50kg of ethylene glycol, 0.50kg of trimethylolpropane, 2.00kg of silicone foam stabilizer, 2.00kg of deionized water, and 0.64kg of ultraviolet absorber UV -320, 0.64kg of light stabilizer 292, 0.32kg of antioxidant 245 and 1.00kg of organic tin metal catalyst were mixed and stirred for 3 hours, and the hydroxyl value and moisture content were detected. When the hydroxyl value reached 235.7mgKOH / g and the moisture content was 2.0%. Seal t...
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