公开(公告)号：US4945072A

公开(公告)日：1990-07-31

申请号：US457120

申请日：1989-12-11

申请人： Gary T. Burns ,  Gregg A. Zank

发明人： Gary T. Burns ,  Gregg A. Zank

IPC分类号： C04B35/571 ,  C08G77/60 ,  C08G79/00

CPC分类号： C08G77/60 ,  C04B35/571 ,  C08G79/00

摘要： A process for the preparation of preceramic metallopolysilanes is described. The process consists of reacting polysilanes with metallic compounds from which can be generated open coordination sites associated with the metallic element. Such open coordination sites can be generated by the reduction of the metallic compound with an alkali metal reducing agent, or by heating a metallic compound which has thermally labile ligands, or by the UV irradiation of a carbonyl-containing metallic compound. The metals which can be incorporated into the polysilane include aluminum, boron, chromium, molybdenum, tungsten, titanium, zirconium, hafnium, vanadium, niobium, and tantalum. These metallopolysilanes are useful, when fired at high temperatures, to form metal-containing ceramic materials.

摘要翻译： 描述了制备前陶瓷金属多硅烷的方法。 该方法包括使聚硅烷与金属化合物反应，由此可以产生与金属元素相关的开放配位点。 可以通过用碱金属还原剂还原金属化合物，或加热具有热不稳定性配体的金属化合物，或通过含有羰基的金属化合物的紫外线照射来产生这种开放的配位点。 可以结合到聚硅烷中的金属包括铝，硼，铬，钼，钨，钛，锆，铪，钒，铌和钽。 当在高温下焙烧时，这些金属多晶硅是有用的，以形成含金属的陶瓷材料。

公开(公告)号：US4921917A

公开(公告)日：1990-05-01

申请号：US103275

申请日：1987-10-01

申请人： Gary T. Burns

发明人： Gary T. Burns

IPC分类号： C08G77/60

CPC分类号： C08G77/60

摘要： An improvement in pre-ceramic methylpolysilanes that utilizes the reaction of methylpolysilanes with multiple-unsaturated compounds to reduce the number of ternary and highly reduced silicon atoms in the polymer matrix. Polymers thus modified are generally easier to process into ceramic fibers than prior art methylpolysilanes.

摘要翻译： 利用甲基聚硅烷与多不饱和化合物的反应来减少聚合物基体中三元和高度还原的硅原子的数量，改进了前陶瓷甲基聚硅烷。 如此改性的聚合物通常比现有技术的甲基聚硅烷更容易加工成陶瓷纤维。

公开(公告)号：US4761458A

公开(公告)日：1988-08-02

申请号：US85826

申请日：1987-08-17

申请人： Gary T. Burns ,  Paul P. Lu ,  Gregg A. Zank

发明人： Gary T. Burns ,  Paul P. Lu ,  Gregg A. Zank

IPC分类号： C04B35/571 ,  C08G77/48 ,  C08G77/60 ,  C08F283/00

CPC分类号： C08G77/60 ,  C04B35/571

摘要： Halogenated polycarbosilanes are prepared by reacting a polycarbosilane containing at least 0.1 weight percent Si-H groups with a halogenating reagent selected from the group consisting of chlorine, bromine, phosphorous pentachloride, phosphorous pentabromide, antimony pentachloride, N-chlorosuccinimide, N-bromosuccinimide, sulfonyl chloride, and mixtures of CH.sub.e X.sub.f and a free radical initiator where e is 0 or 1, f is 3 or 4, the sum (e+f) is 4, and X is chlorine or bromine. The halogenated polycarbosilanes can be further treated to produce other derivatized polycarbosilanes. The halogenated and derivatized polycarbosilanes can be converted to silicon carbide-containing ceramic materials by pyrolysis at elevated temperatures under an inert atmosphere.

公开(公告)号：US20120231186A1

公开(公告)日：2012-09-13

申请号：US13511344

申请日：2010-11-24

申请人： Gary T. Burns ,  Robert J. Harmer

发明人： Gary T. Burns ,  Robert J. Harmer

IPC分类号： C01B33/037 ,  B32B1/00

CPC分类号： C01B33/037 ,  Y10T428/13

摘要： In various embodiments, provided are methods of refining silicon wherein impurities of different densities are separated and concentrated using centrifugal force, and controlled crystallization of molten silicon provides further purification through concentration of impurities at a solid/liquid interface.

摘要翻译： 在各种实施方案中，提供了精制硅的方法，其中使用离心力分离和浓缩不同密度的杂质，并且熔融硅的受控结晶通过在固/液界面处浓缩杂质进一步提纯。

公开(公告)号：US5395908A

公开(公告)日：1995-03-07

申请号：US262702

申请日：1994-06-20

申请人： Debora F. Bergstrom ,  Gary T. Burns ,  Patricia A. Giwa-Agbomeirele

发明人： Debora F. Bergstrom ,  Gary T. Burns ,  Patricia A. Giwa-Agbomeirele

IPC分类号： C08G77/04 ,  C08G77/06 ,  C08L83/04 ,  C08G77/08

CPC分类号： C08L83/04 ,  C08G77/16 ,  C08G77/18

摘要： A method for preparing in situ reinforced silicone elastomers and the compositions prepared by the method. The method comprises forming a mixture comprising a diorganosiloxane polymer having reactive end-terminal functionality, a stoichiometric excess of a reactive siloxane selected from a group consisting of triorganosilyl endblocked reactive siloxanes and reactive cyclosiloxanes, and a tin salt catalyst and contacting the mixture with water to effect curing. The resulting silicone elastomers are in situ reinforced to provide high strength.

摘要翻译： 一种制备原位增强的有机硅弹性体的方法和通过该方法制备的组合物。 该方法包括形成包含具有反应性末端官能团的二有机硅氧烷聚合物，选自三有机甲硅烷基封端的反应性硅氧烷和反应性环硅氧烷的反应性硅氧烷的化学计量过量的混合物和锡盐催化剂，并将该混合物与水接触 效果固化。 所得到的有机硅弹性体原位加强以提供高强度。

公开(公告)号：US5290901A

公开(公告)日：1994-03-01

申请号：US074512

申请日：1993-06-14

申请人： Gary T. Burns ,  Gary T. Decker ,  Aroop K. Roy

发明人： Gary T. Burns ,  Gary T. Decker ,  Aroop K. Roy

IPC分类号： C08G77/06 ,  C07F7/08 ,  C08G77/14 ,  C08G77/16 ,  C08G77/22 ,  C08G77/38 ,  C08G77/04

CPC分类号： C08G77/16 ,  C07F7/0847 ,  C08G77/14

摘要： The present invention is a method for the preparation of carbinol-functional organosiloxanes and carbinol-functional organosiloxane resins. The method comprises contacting a cyclic silyl ether with an organosiloxane or an organosiloxane resin at a temperature within a range of about 25.degree. C. to 150.degree. C. The method may be conducted in the presence of an inert organic solvent to facilitate dissolution and contact of the reactants.

摘要翻译： 本发明是一种制备甲醇官能的有机硅氧烷和甲醇官能的有机硅氧烷树脂的方法。 该方法包括使环甲硅烷基醚与有机硅氧烷或有机硅氧烷树脂在约25℃至150℃的温度范围内接触。该方法可以在惰性有机溶剂的存在下进行以促进溶解和接触 的反应物。

公开(公告)号：US5049611A

公开(公告)日：1991-09-17

申请号：US422211

申请日：1989-10-16

申请人： Ronald H. Baney ,  Carl J. Bilgrien ,  Gary T. Burns ,  Lawrence D. Fiedler ,  Chi-long Lee

发明人： Ronald H. Baney ,  Carl J. Bilgrien ,  Gary T. Burns ,  Lawrence D. Fiedler ,  Chi-long Lee

IPC分类号： C08G77/04 ,  C08G77/06 ,  C08G77/50 ,  C08K5/00

CPC分类号： C08G77/50 ,  C08G77/04 ,  C08K5/0025

摘要： The silacyclobutane functional polydiorganosiloxane copolymers of the invention have the following structure: ##STR1## wherein M is selected from ##STR2## wherein R.sup.a, R.sup.b, R.sup.c, R.sup.d, R.sup.e, and R.sup.f are independently monovalent radicals selected from the group consisting of hydrogen, hydrocarbon, or substituted hydrocarbon; m and x are integers of from 0 or more; n is equal to 1; and p is an integer greater than 0; with the proviso that there is at least one silacyclobutane group in the copolymer. The copolymer can be made by reacting a hydroxyl endblocked polydiorganosiloxane with either a difunctional chain extending silacyclobutane or with a monofunctional chain stopper, or a mixture of chain extender and chain stopper. The copolymer can be made into curable compositions by use of suitable catalyst.

公开(公告)号：US5025075A

公开(公告)日：1991-06-18

申请号：US222897

申请日：1988-07-22

申请人： Gary T. Burns

发明人： Gary T. Burns

IPC分类号： C04B35/571 ,  C08G77/48 ,  C08G77/60

CPC分类号： C04B35/571 ,  C08G77/60

摘要： A process for the preparation of a methylpolysilane having a controlled carbon content is provided which includes the steps of heating together to form a reaction mixture at least one alkoxy-functional disilane selected from the group consisting of disilanes having two, three, and four alkoxy groups bonded to the silicon atoms, and mixtures thereof, with either an alkoxy-functional silane having at least one unsaturated substituent or an unsaturated hydrocarbon compound in an amount effective to increase the carbon content of the resulting polymer. The reaction is carried out in the presence of a catalyst which is a source of alkoxide ions. The methylpolysilane polymers produced may be pyrolyzed to form ceramic compositions having increased carbon contents. The ceramics may find use as films, fibers, and coatings, as well as the many other uses to which silicon carbide ceramics have heretofore been put.

摘要翻译： 提供了一种制备具有受控碳含量的甲基聚硅烷的方法，其包括以下步骤：一起加热以形成反应混合物，所述反应混合物至少一种烷氧基官能的乙硅烷选自具有2,3和4个烷氧基的二硅烷 与具有至少一个不饱和取代基的烷氧基官能硅烷或具有有效增加所得聚合物的碳含量的不饱和烃化合物的硅原子及其混合物结合。 反应在作为醇盐离子源的催化剂存在下进行。 所生产的甲基聚硅烷聚合物可以被热解以形成具有增加的碳含量的陶瓷组合物。 陶瓷可以用作膜，纤维和涂层，以及迄今为止已经将碳化硅陶瓷所用的许多其它用途。

公开(公告)号：US5023307A

公开(公告)日：1991-06-11

申请号：US223012

申请日：1988-07-22

申请人： Gary T. Burns

发明人： Gary T. Burns

IPC分类号： C01B31/36 ,  C04B35/571 ,  C08G77/48 ,  C08G77/60 ,  D01F9/10

CPC分类号： C04B35/571 ,  C08G77/60

摘要： A process for the preparation of a methylpolysilane having a controllable rheology, including a controllable glass transition temperature is provided which includes the steps of heating together at least one alkoxy-functional disilane selected from the group consisting of disilane having three and four alkoxy groups bonded to the silicon atoms, and mixtures thereof, with an amount of a dialkoxy disilane effective to control the glass transition temperature of the resulting polymer within the range of from about 0.degree. to about 200.degree. C. The reaction is carried out in the presence of a catalyst which is a source of alkoxide ions to catalyze the redistribution reaction. The redistribution reaction produces oligomer and longer chain polymeric silanes having greater than seven silicon atoms in the polymer chain. Methylpolysilanes formed in accordance with the practice of the present invention may then be readily formed into fibers by a conventional spinning process. Alternatively, the methylpolysilanes of the present invention may also find use as binders, coatings, and films for ceramic compositions. The methylpolysilanes may be pyrolyzed to form ceramic compositions.

摘要翻译： 提供了一种制备具有可控流变性的甲基聚硅烷的方法，其包括可控的玻璃化转变温度，其包括以下步骤：将至少一种烷氧基官能的乙硅烷加热，所述烷氧基官能的硅烷选自具有三个和四个烷氧基的乙硅烷基， 硅原子及其混合物与一定量的二烷氧基乙硅烷有效地将所得聚合物的玻璃化转变温度控制在约0℃至约200℃的范围内。该反应在 催化剂，其是烷氧基离子的来源以催化再分布反应。 再分布反应产生聚合物链中具有大于7个硅原子的低聚物和长链聚合硅烷。 然后根据本发明的实践形成的甲基聚硅烷可以通过常规的纺丝方法容易地形成纤维。 或者，本发明的甲基聚硅烷也可用作陶瓷组合物的粘合剂，涂料和膜。 甲基聚硅烷可以被热解以形成陶瓷组合物。

公开(公告)号：US4929573A

公开(公告)日：1990-05-29

申请号：US249036

申请日：1988-09-26

申请人： William H. Atwell ,  Gary T. Burns ,  Chandan K. Saha

发明人： William H. Atwell ,  Gary T. Burns ,  Chandan K. Saha

IPC分类号： C04B35/571 ,  C04B35/575 ,  C08K3/34 ,  C08L83/04

CPC分类号： C04B35/575 ,  C04B35/571

摘要： The preparation of highly densified ceramic bodies by the sintering of certain organopolysiloxanes filled with silicon carbide powders, and metal-containing sintering aids is described. Such highly densified ceramic bodies can be prepared by either a pressureless sintering process or a hot press sintering process. The compositions of this invention can be formed into desired shapes and then sintered to form ceramic, shaped bodies with high densities. One advantage of the present invention is that the green bodies have relative high strengths and thus can be easily handles and, if desired, machined before sintered. The organopolysiloxanes useful in this invention must yield a ceramic char which contains free or excess carbon in addition to carbon in the form of silicon carbide upon pyrolysis to elevated temperatures.