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    • 1. 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。
    • 5. 发明授权
    • Stabilized gamma irradiated polyolefins
    • 稳定的γ照射聚烯烃
    • US06872764B2
    • 2005-03-29
    • US10372751
    • 2003-02-24
    • Roswell E. King, III
    • Roswell E. King, III
    • C08K5/16C08K5/51C08K5/3435C08K5/1535C08K5/3477
    • C08K5/16C08K5/51C08L23/02
    • Certain essentially phenol antioxidant-free stabilizer systems that comprise either a binary hindered amine/hydroxylamine or nitrone or amine oxide or benzofuranone system or a ternary hindered amine/hydroxylamine or nitrone or amine oxide or benzofuranone/organic phosphite or phosphonite system are especially effective towards protecting polyolefins against the deleterious effects of gamma irradiation. Polyolefin articles such as medical packaging, hospital garments, draperies, woven and non-woven fiber products, surgery utensils, blow-molded I.V. bottles, hypodermic syringes, needle shields, laboratory ware such as trays, funnels, Petri dishes and filters, and hygiene related articles may be sterilized with gamma irradiation and are stabilized according to the present invention.
    • 包含二元受阻胺/羟胺或硝酮或氧化胺或苯并呋喃酮体系或三元受阻胺/羟胺或硝酮或氧化胺或苯并呋喃酮/有机亚磷酸酯或亚膦酸盐体系的某些基本上无酚类抗氧化剂的稳定剂体系对于保护是特别有效的 聚烯烃抵抗γ照射的有害影响。 聚烯烃制品如医疗包装,医院服装,布帘,纺织和无纺布纤维制品,手术器具,吹塑成型I.V。 瓶子,皮下注射器,针罩,实验室用品如托盘,漏斗,培养皿和过滤器以及与卫生有关的物品可以用γ射线灭菌并且根据本发明是稳定的。