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    • 1. 发明授权
    • Process for the continuous production of monoisocyanates
    • 连续生产单异氰酸酯的方法
    • US4195031A
    • 1980-03-25
    • US965648
    • 1978-12-20
    • Wolfgang ReichmannKlaus KonigJohannes Koster
    • Wolfgang ReichmannKlaus KonigJohannes Koster
    • C07C265/02C07C20060101C07C67/00C07C241/00C07C263/04C07C265/04C07C118/00
    • C07C263/04
    • The instant invention relates to an improved process for the continuous production of an aliphatic monoisocyanate from the corresponding N-alkyl carbamic acid aryl ester. More particularly, the invention is directed to a process for the continuous production of monoisocyanates corresponding to the formulaR--NCOin whichR represents an aliphatic hydrocarbon radical containing 1 to 3 carbon atoms comprising thermally decomposing the corresponding N-alkylcarbamic acid aryl esters corresponding to the formulaR--NH--CO--O--R'in whichR has the meaning above andR' represents a radical of the type obtained by removing the hydroxyl group from a monophenol having a boiling point below 250.degree. C. at normal pressure, and separating the decomposition products by decomposition, further characterized in that(a) a solution of the N-alkylcarbamic acid aryl ester in an organic solvent, which solvent is inert under the reaction conditions and has a boiling point lying at least 20.degree. C. above the boiling point of the monoisocyanate to be formed, is heated to a temperature of from 160.degree. C. to 250.degree. C. at normal pressure or at slightly reduced pressure within the range of 200 to 1013 mbar, thereby resulting in the decomposition of the ester into the corresponding monoisocyanate and the corresponding phenol, as well as the evaporation of the solvent and the decomposition products, and(b) the vapors formed are fed into a distillation column with the monoisocyanate obtained at the head of the column and with the phenol and at least a major portion of the solvent obtained from a side stream or from several side streams.
    • 本发明涉及从相应的N-烷基氨基甲酸芳基酯连续制备脂族单异氰酸酯的改进方法。 更具体地说,本发明涉及连续制备相应于式R-NCO的单异氰酸酯的方法,其中R代表含有1至3个碳原子的脂族烃基,包括热分解相应的N-烷基氨基甲酸芳基酯 式R-NH-CO-OR'其中R具有上述含义,R'表示通过在常压下从沸点低于250℃的单酚除去羟基得到的类型的基团,并且分离 分解产物,其特征还在于(a)N-烷基氨基甲酸芳基酯在有机溶剂中的溶液,该溶剂在反应条件下是惰性的,并且沸点至少在20℃以上 要形成的单异氰酸酯的沸点在常压或稍微减压的范围内加热到160℃至250℃的温度 e为200至1013毫巴,从而导致酯分解成相应的单异氰酸酯和相应的苯酚,以及溶剂和分解产物的蒸发,和(b)所形成的蒸气进料到蒸馏塔 与在柱的头部和苯酚获得的单异氰酸酯以及从侧流或从多个侧流获得的至少大部分溶剂。
    • 10. 发明授权
    • Polyurethane-based thickeners for aqueous compositions
    • 用于水性组合物的聚氨酯类增稠剂
    • US5612408A
    • 1997-03-18
    • US593036
    • 1996-01-29
    • Klaus KonigJurgen SchwindtJan MazanekJosef PedainManfred DietrichGerhard KleinKarl-Roland Jerg
    • Klaus KonigJurgen SchwindtJan MazanekJosef PedainManfred DietrichGerhard KleinKarl-Roland Jerg
    • C09K3/00C08G18/28C08G18/48C08G65/28C08L75/00C08L75/08C09D7/00C09D175/00C09D175/04C08G18/12C08G18/42
    • C08G18/4833C08G18/283C09D7/002C08L75/04
    • The present invention relates to a process for the preparation of polyurethanes suitable for use as thickeners for aqueous compositions by reacting at an NCO/OH equivalent ratio of 0.9:1 to 1.2:1a) a polyether component having an OH number of 10 to 30 mg KOH/g and obtained by the alkoxylation of a mixture ofa1) 30 to 80 mole % of a monofunctional alcohol or alkylphenol having 8 to 30 carbon atoms,a2) 2 to 10 mole % of sodium hydroxide or potassium hydroxide,a3) 10 to 60 mole % of water anda4) 0 to 10 mole % of a trihydric to hexahydric alcohol having a molecular weight of 92 to 600, with ethylene oxide or a mixture of ethylene oxide with up to 20 mole %, based on the total moles of alkylene oxides, of propylene oxide, in which the percentages of a1) to a4) add up to 100,withb) a polyisocyanate component containing at least one organic diisocyanate, optionally in admixture with up to 20 mole %, based on the total moles of component b), of higher than difunctional polyisocyanates.The invention also relates to the polyurethanes obtainable by this method and their use, optionally in combination with other thickeners, for the thickening of aqueous systems.
    • 本发明涉及一种制备适合用作水性组合物增稠剂的聚氨酯的方法,其通过以0.9:1至1.2:1的NCO / OH当量比反应a)OH数为10至30的聚醚组分 mg KOH / g,通过a1)30〜80摩尔%的单官能醇或碳原子数为8〜30的烷基酚的混合物的烷氧基化得到,a2)2〜10摩尔%的氢氧化钠或氢氧化钾,a3)10 至60摩尔%的水和a4)0至10摩尔%的分子量为92至600的三元至六元醇与环氧乙烷或环氧乙烷的混合物至多20摩尔%,基于总摩尔数 的环氧丙烷,其中a1)至a4)的百分比加到100,其中b)含有至少一种有机二异氰酸酯的多异氰酸酯组分,任选地与至多20摩尔%的混合物,基于总计 组分b)的摩尔数高于双官能多异氰酸酯。 本发明还涉及通过该方法获得的聚氨酯,以及它们用于任选与其它增稠剂组合的用于增稠水性体系的用途。