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    • 5. 发明授权
    • Method for making polysilazanes
    • 聚硅氮烷的制备方法
    • US4675424A
    • 1987-06-23
    • US841545
    • 1986-03-19
    • Roswell E. King, IIIBernard KannerSteven P. HopperCurtis L. Schilling, Jr.
    • Roswell E. King, IIIBernard KannerSteven P. HopperCurtis L. Schilling, Jr.
    • C04B35/589C07F7/10C08G77/48C08G77/62
    • C08G77/62C04B35/589C07F7/10
    • A method of preparing silazane polymers, with 3 or more repeating units, of the general formula--((CH.sub.3).sub.2 N).sub.e Si(R).sub.a (R'HN).sub.f H.sub.c (NR').sub.g --and a (CH.sub.3).sub.2 NH byproduct group where R is hydrogen, an alkyl group having 1-6 carbon atoms or an aryl group having 6-12 carbon atoms, a=0, or 1, b=2-4, C=0-2, d=0 or 1, e=0-2, f=0-2, g=1-3 and a+c+e+f+g=4 for the polymer units; and R' is hydrogen or methyl, whereby the silazane polymer is substantially free of halide impurities, and wherein this method comprises:transaminating an aminosilane of the general formula (R).sub.a ((CH.sub.3).sub.2 N).sub.b H.sub.c S; where R is defined as above and a+b+c=4 with an amine of the general formula (CH.sub.3).sub.d NH.sub.3-d whereby d is defined as above and the amine has a molecular weight lower than 45 all in the presence of an acid catalyst or the ammonium salt of the acid and thereafter condensing to form the polymer.
    • 制备具有3个以上重复单元的具有通式 - ((CH 3)2 N)e Si(R)a(R'HN)fHc(NR')g - 和(CH 3)2 NH副产物基团)的硅氮烷聚合物的方法 其中R是氢,具有1-6个碳原子的烷基或具有6-12个碳原子的芳基,a = 0或1,b = 2-4,C = 0-2,d = 0或1, 对于聚合物单元,e = 0-2,f = 0-2,g = 1-3和a + c + e + f + g = 4; 并且R'是氢或甲基,由此硅氮烷聚合物基本上不含卤化物杂质,并且其中该方法包括:将通式(R)a((CH 3)2 N)b H c S的氨基硅烷转氨酸; 其中R如上所定义,a + b + c = 4与通式(CH3)dNH3-d的胺反应,其中d如上定义,胺在酸存在下全部分子量低于45 催化剂或酸的铵盐,然后冷凝形成聚合物。
    • 8. 发明授权
    • Polyurethanes and their preparation
    • 聚氨酯及其制备方法
    • US4242466A
    • 1980-12-30
    • US3818
    • 1979-01-16
    • Curtis L. Schilling, Jr.C. Scott Eschbach
    • Curtis L. Schilling, Jr.C. Scott Eschbach
    • C08G77/46C08J9/00C12P13/16
    • C08J9/0061C08G77/46C08J2375/04C08J2483/00
    • Organic ethers including polyethers having two CH.sub.2 .dbd.C(R)CH.sub.2 -- end groups per molecule wherein R is a monovalent hydrocarbon group are reacted with organohydrosiloxanes under hydrosilation reaction conditions in the presence of a platinum catalyst preferably a neutral platinum catalyst, to form very useful nonhydrolyzable siloxane block copolymers. Novel nonhydrolyzable linear block copolymers substantially free of silicon-bonded hydrogen are obtained with linear dihydropolyorganosiloxane reactants and linear ethers or polyethers. The linear block copolymers made with the linear dihydrosiloxanes and polyethers are particularly useful as surfactants and foam stabilizers for the preparation of polyurethane foams. The very low degree (if any) of isomerization of the CH.sub.2 .dbd.C(R)CH.sub.2 -- group to unreactive species during the hydrosilation reaction results in the unexpectedly high molecular weight of the copolymers of the present invention.
    • 在铂催化剂,优选中性铂催化剂的存在下,在氢化硅烷化反应条件下,每分子具有两个CH 2 = C(R)CH 2 - 端基的聚醚的有机醚,其中R是一价烃基,与有机氢硅氧烷反应,形成非常有用的 不可水解的硅氧烷嵌段共聚物。 使用线性二氢聚有机硅氧烷反应物和直链醚或聚醚获得基本上不含硅键合氢的新型不可水解线性嵌段共聚物。 用线性二氢硅氧烷和聚醚制成的线性嵌段共聚物特别可用作用于制备聚氨酯泡沫的表面活性剂和泡沫稳定剂。 在硅氢化反应期间,CH 2 = C(R)CH 2 - 基团与非反应性物质异构化的非常低的程度(如果有的话)导致本发明的共聚物意想不到的高分子量。