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    • 24. 发明申请
    • HYDROPHILIC PREPOLYMER FOR POLYURETHANE FOAMS
    • 用于聚氨酯泡沫的水解制剂
    • WO2016069437A1
    • 2016-05-06
    • PCT/US2015/057295
    • 2015-10-26
    • DOW GLOBAL TECHNOLOGIES LLC
    • SRIVASTAVA, Yasmin N.GAMBOA, RogelioDUGGAL, Rajat
    • C08G18/76C08G18/48C08G101/00
    • C08G18/12A47C27/14A47G9/10A47G2009/1018C08G18/14C08G18/4804C08G18/4812C08G18/4833C08G18/4837C08G18/485C08G18/7671C08G2101/0008C08G2101/0058C08G2101/0083C08G2350/00C08J9/00C08J2375/08C08G18/302
    • A polyurethane foam for comfort application, includes the reaction product of a first composition that includes from 20 wt% to 80 wt% of an aqueous component and from 20 wt% to 80 wt% of a hydrophilic isocyanate-terminated prepolymer component. The aqueous component includes at least 90 wt% of water based on the total weight of the aqueous component and the hydrophilic isocyanate-terminated prepolymer component has a free NCO content from 1 wt% to 15 wt% and is a reaction product of a second composition that includes an isocyanate component and an isocyanate-reactive component. The isocyanate component includes at least 90 wt% of methylenediphenyl diisocyanate (MDI) and a weight ratio of 4,4'-methylene diphenylisocyanate isomer to 2,4'- methylene diphenylisocyanate isomer greater than 1:1 and less than 10:1, the isocyanate-reactive component including polyethylene glycol and a polyoxypropylene-polyoxyethylene polyol having a molecular weight of from 3000 g/mole to 7500 g/mole and a polyoxyethylene content of at least 50 wt%, and the hydrophilic isocyanate terminated prepolymer component having an polyoxyethylene content from 45 wt% to 75 wt%, based on the total weight of the second composition.
    • 用于舒适应用的聚氨酯泡沫包括第一组合物的反应产物,其包含20重量%至80重量%的水性组分和20重量%至80重量%的亲水异氰酸酯封端的预聚物组分。 含水组分包含至少90重量%的水,基于水性组分的总重量,亲水异氰酸酯封端的预聚物组分具有1重量%至15重量%的游离NCO含量,并且是第二组合物的反应产物 其包括异氰酸酯组分和异氰酸酯反应性组分。 异氰酸酯组分包括至少90重量%的亚甲基二苯基二异氰酸酯(MDI)和4,4'-亚甲基二苯基异氰酸酯异构体与2,4'-亚甲基二苯基异氰酸酯异构体的重量比大于1:1且小于10:1, 异氰酸酯反应性成分,包括分子量为3000g / mol〜7500g / mol,聚氧乙烯含量为50重量%以上的聚乙二醇和聚氧丙烯 - 聚氧乙烯多元醇,亲水性异氰酸酯封端的预聚物成分的聚氧乙烯含量 基于第二组合物的总重量从45重量%至75重量%。