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    • 9. 发明申请
    • Method For Producing Polyurethane And Polyisocyanurate Rigid Foam
    • 聚氨酯和聚异氰脲酸酯刚性泡沫的生产方法
    • US20080188582A1
    • 2008-08-07
    • US11911544
    • 2006-04-11
    • Pit LehmannPeter von MalotkiRainer HensiekLars Schon
    • Pit LehmannPeter von MalotkiRainer HensiekLars Schon
    • C08G18/10
    • C08G18/4288C08G18/10C08G18/664
    • The invention relates to a process for producing rigid polyurethane and polyisocyanurate foams by reacting polyisocyanates a) with compounds having at least two hydrogen atoms which are reactive toward isocyanate groups b) in the presence of blowing agents c), wherein prepolymers which comprise isocyanate groups and have an NCO content in the range from 25 to 31% by weight, based on the weight of the prepolymer, and are prepared by reacting ai) mixtures of monomeric and polymeric diphenylmethane diisocyanate with at least one compound having more than one hydrogen atom which is reactive toward isocyanate groups aii) are used as polyisocyanates a) and the compounds having at least two hydrogen atoms which are reactive toward isocyanate groups b) comprise at least one polyester alcohol bi) which comprises at least one starting component which is hydrophobic.
    • 本发明涉及一种生产硬质聚氨酯和聚异氰脲酸酯泡沫的方法,该方法是使多异氰酸酯a)与具有至少两个对异氰酸酯基反应的氢原子的化合物b)在发泡剂c)存在下,其中包含异氰酸酯基团和 基于预聚物的重量,NCO含量在25〜31重量%的范围内,并且通过使ai)单体和聚合二苯基甲烷二异氰酸酯的混合物与至少一种具有多于一个氢原子的化合物 对异氰酸酯基团反应的aii)用作多异氰酸酯a),并且具有至少两个对异氰酸酯基团具有反应性的氢原子的化合物b)包含至少一种聚酯醇bi),其包含至少一种疏水性的起始成分。