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    • 4. 发明授权
    • Process for the production of semirigid foams containing urethane groups
with improved flow properties
    • 用于生产含有具有改善的流动性质的氨基甲酸酯基团的半刚性泡沫的方法
    • US5416125A
    • 1995-05-16
    • US325715
    • 1994-10-19
    • Ulrich LimanPeter Gansen
    • Ulrich LimanPeter Gansen
    • C08J9/02B32B5/20C08G18/40C08G18/65C08G18/76C08G101/00C08J9/00C08J9/14C08L75/04C08G18/06C08J9/08
    • C08G18/7664C08G2101/0016C08G2101/0083
    • The present invention relates to a process for the production of semi-rigid foams containing urethane groups which exhibit very good flow properties during the production process. These semi-rigid foams are produced by reacting a reaction mixture of:1) polyisocyanates,2) organic compounds containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight in the range from 400 to 10,000, and3) water and/or organic blowing agents.In particular, the polyisocyanates comprise a mixture of:a) 55 to 87% by weight, based on 100% by weight of the mixture, of 4,4'-diphenylmethane diisocyanate,b) 8 to 40% by weight, based on 100% by weight of the mixture, of 2,4'-diphenylmethane diisocyanate,c) 0.1 to 4% by weight, based on 100% by weight of the mixture, of 2,2'-diphenylmethane diisocyanate, andd) 5 to 35% by weight, based on 100% by weight of the mixture, of polyphenyl polymethylene polyisocyanates.
    • 本发明涉及一种生产含有氨基甲酸酯基团的半刚性泡沫的方法,在生产过程中表现出非常好的流动性。 这些半刚性泡沫体通过以下反应混合物制备:1)多异氰酸酯,2)含有至少两个异氰酸酯反应性氢原子并且分子量在400至10,000的有机化合物,和3)水和/ 或有机发泡剂。 特别地,多异氰酸酯包括以下混合物:a)基于100重量%的混合物的55-87重量%的4,4'-二苯基甲烷二异氰酸酯,b)8至40重量%,基于100 混合物的重量%,2,4'-二苯基甲烷二异氰酸酯,c)0.1至4重量%,基于100重量%的混合物,2,2'-二苯基甲烷二异氰酸酯,和d)5至35 基于100重量%的混合物的重量%的聚苯基多亚甲基多异氰酸酯。
    • 9. 发明授权
    • Production of di- and polyisocyanates of the diphenylmethane series with defined acidity
    • 生产具有确定酸度的二苯基甲烷系列的二异氰酸酯和多异氰酸酯
    • US07205430B2
    • 2007-04-17
    • US11048667
    • 2005-02-01
    • Ulrich LimanHeinz-Herbert MüllerRobert VielerRalf Echterhoff
    • Ulrich LimanHeinz-Herbert MüllerRobert VielerRalf Echterhoff
    • C07C263/00C07C249/00
    • C07C263/10C07C263/20C08G18/7664C07C265/14
    • The invention relates to a process for the production of di- and polyisocyanates of the diphenylmethane series and mixtures thereof, in which aniline and formaldehyde are reacted in the presence of an acid catalyst to form di- and polyamines of the diphenylmethane series; the di- and polyamines of the diphenylmethane series are phosgenated, optionally in the presence of a solvent, to obtain a crude di- and polyisocyanate; from the crude di- and polyisocyanate, at least one fraction containing at least 5 wt. % 3-ring and multi-ring MDI and at least one fraction containing at least 95 wt. % 2-ring MDI are separated by distillation, and the acidities of the fraction containing at least 5 wt. % 3-ring MDI and multi-ring MDI, and/or the fraction containing at least 95 wt. % 2-ring MDI are determined analytically; and an acidic compound is added to the fraction containing at least 5 wt. % 3-ring MDI and multi-ring MDI, and/or the fraction containing at least 95 wt. % 2-ring MDI, so that the desired acidity is achieved.
    • 本发明涉及二苯基甲烷系列的二异氰酸酯和多异氰酸酯的制造方法及其混合物,其中苯胺和甲醛在酸催化剂的存在下反应形成二苯基甲烷系列的二胺和多胺; 任选在溶剂存在下,将二苯基甲烷系列的二胺和多胺光气化,得到粗二异氰酸酯和多异氰酸酯; 从粗二异氰酸酯和多异氰酸酯,至少含有至少5wt。 %3环和多环MDI和至少一个含有至少95wt。 %2环MDI通过蒸馏分离,并且含有至少5wt。 %3环MDI和多环MDI,和/或含有至少95重量% %2环MDI是分析确定的; 并将酸性化合物加入到含有至少5wt。 %3环MDI和多环MDI,和/或含有至少95重量% %2环MDI,从而达到所需的酸度。
    • 10. 发明授权
    • Production of mixtures of diisocyanates and polyisocyanates from the diphenylmethane series with high contents of 4,4′-methylenediphenyl diisocyanate and 2,4′-methylenediphenyl diisocyanate
    • 从二苯基甲烷系列与高含量的4,4'-亚甲基二苯基二异氰酸酯和2,4'-亚甲基二苯基二异氰酸酯制备二异氰酸酯和多异氰酸酯的混合物
    • US07038002B2
    • 2006-05-02
    • US10896129
    • 2004-07-21
    • Hans-Georg PirklUlrich LimanRobert VielerRalf Echterhoff
    • Hans-Georg PirklUlrich LimanRobert VielerRalf Echterhoff
    • C08G18/00C08G18/32
    • C07C263/10C07C263/20C07C265/14
    • A fraction of diisocyanates of the diphenylmethane series containing at least 95 wt. % binuclear methylenediphenyl diisocyanate is obtained by a) reacting aniline and formaldehyde in the presence of an acid catalyst to produce diamines and polyamines of the diphenylmethane series containing binuclear methylenediphenyl diamine, b) phosgenating the diamines and polyamines produced in a), optionally in the presence of a solvent, to produce a crude diisocyanate and polyisocyanate, and c) separating a fraction containing at least 95 wt. % binuclear methylenediphenyl diisocyanate with a 4,4′-MDI content of over 60 wt. %, a 2,4′-MDI content of 4 to 35 wt. % and a 2,2′-MDI content of 0.01 to 10 wt. %, relative to the mass of the fraction, and a maximum of 20 ppm phenyl isocyanate and optionally a maximum of 50 ppm solvent from the crude diisocyanate and polyisocyanate produced in b) in a single distillation step with optional upstream and/or downstream separation of low-boiling components.
    • 二苯基甲烷系列的二异氰酸酯的一部分含有至少95wt。 通过以下方法获得%双核亚甲基二苯基二异氰酸酯:a)在酸催化剂存在下使苯胺和甲醛反应,生成含有双核亚甲基二苯基二胺的二苯基甲烷系列的二胺和多胺,b)使a)中产生的二胺和多胺光气化, 的溶剂,以产生粗二异氰酸酯和多异氰酸酯,和c)分离含有至少95重量% 具有超过60重量%的4,4'-MDI含量的双核亚甲基二苯基二异氰酸酯。 %,2,4'-MDI含量为4〜35wt。 %和2,2'-MDI含量为0.01〜10wt。 相对于馏分的质量,最大值为20ppm的苯基异氰酸酯和任选的最大值为50ppm的溶剂,来自粗制二异氰酸酯和b)中产生的多异氰酸酯,在单一蒸馏步骤中具有任选的上游和/或下游分离 低沸点组分。