Boron Reactant Contains A Nitrogen Atom Patents (Class 528/7)
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Patent number: 5543485Abstract: The present invention relates to novel preceramic oligo- or polyborosilazane compounds having the structural feature Si--N--B, and to a ceramic material based on SiN and BN, to a process for the production thereof and to the use of the polyborosilazanes and the ceramic materials.Type: GrantFiled: December 12, 1994Date of Patent: August 6, 1996Assignee: Bayer AGInventor: Hans-Peter Baldus
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Patent number: 5502142Abstract: Direct thermal syntheses in the absence of catalyst, of poly(borazylenes) and of oligomers of borazine with polyhedral boranes, carboranes or heteroboranes are disclosed. The products of these syntheses are precursors to BN or other boron-containing ceramics.Type: GrantFiled: October 26, 1993Date of Patent: March 26, 1996Assignee: The Trustees of the University of PennsylvaniaInventors: Larry G. Sneddon, Jeffrey S. Beck, Paul J. Fazen
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Patent number: 5399377Abstract: Borazine oligomers in liquid form are produced and used to create composites of fibers bonded to boron nitride as a matrix and also to coat or increase the density of various fiber composites.Type: GrantFiled: December 31, 1992Date of Patent: March 21, 1995Assignee: The Board of Trustees of the University of IllinoisInventors: James Economy, Dong-pyo Kim
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Patent number: 5368935Abstract: Disclosed herein are a heat resistant insulated wire which is not decomposed but maintains insulativity under a high temperature with excellent adhesion of a coating film, and a method of preparing the same. The heat resistant insulated wire includes a base material consisting of an electrical conductor, and an insulating layer provided on its surface. The insulating layer is obtained by heating a second polymer, in which main chains expressed in a chemical formula--[Si(R.sub.1).sub.2 --N(R.sub.2)].sub.n --are cross-linked with each other by chloroborazine through side chains containing trialkylsilyl radicals at a temperature of at least about 300.degree. C. and not more than 500.degree. C.Type: GrantFiled: February 14, 1994Date of Patent: November 29, 1994Assignee: Sumitomo Electric Industries, Ltd.Inventors: Shinji Inazawa, Kouichi Yamada
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Patent number: 5364920Abstract: The present invention describes a novel method for crosslinking polysilazane polymers having Si--H or N--H bonds. The method comprises mixing the polysilazane with a silazane crosslinker having at least 2 boron functional groups which can react with the Si--H or N--H bonds of the polysilazane and then facilitating crosslinking.Type: GrantFiled: August 16, 1993Date of Patent: November 15, 1994Assignee: Dow Corning CorporationInventors: Duane R. Bujalski, Gregg A. Zank, Thomas D. Barnard
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Patent number: 5316986Abstract: Novel boron/nitrogen compounds having the formula (1): ##STR1## and the products of the at least partial reduction thereof, are converted into BN ceramic materials by thermally polymerizing same, whether or not in the presence of suitable polymerization catalyst, and then pyrolyzing the boron/nitrogen polymers thus obtained.Type: GrantFiled: May 17, 1993Date of Patent: May 31, 1994Assignee: Rhone-Poulenc ChimieInventors: Christiane Blanchard, Evelyne Chassagneux, Gerard Mignani, Michel Vaultier
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Patent number: 5256753Abstract: The present invention relates to a method of preparing borazine modified polycarbosilane polymers. The method comprises reacting a polycarbosilane polymer with a material comprising at least borazine ring for a time sufficient to produce the desired polymer. This invention also relates to the novel polymers produced by the above method and the ceramic products derived from heating the novel polymers to greater than about 800.degree. C.Type: GrantFiled: November 2, 1992Date of Patent: October 26, 1993Inventors: Gregg A. Zank, Larry G. Sneddon, Kai Su
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Patent number: 5256487Abstract: Novel polysiloxane-silazane preceramic polymer compositions are prepared by the controlled hydrolysis polymerization of a trimer or tetramer of a monomer of the structure ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are independently alkyl groups containing from 1 to 4 carbon atoms R.sup.a, R.sup.b, R.sup.c, and R.sup.d are independently alkenyl or alkyl groups containing from 2 to 6 carbon atoms with the proviso that at least one of R.sup.a, R.sup.b, R.sup.c, or R.sup.d group is an alkenyl group.Another useful composition is made by reacting the above mentioned monomers with alkoxide or aryloxide compounds of the elements Al, B, Zr, Ti, Si, Hf, and Y in the presence of water to make polysilazoxane polymers modified with said alkoxides or aryloxide compounds. Another useful composition is made by reacting the polysiloxane-silazane polymer with vinyl or allyl substituted compounds of boron or silicon or both.Type: GrantFiled: July 31, 1992Date of Patent: October 26, 1993Assignee: The B. F. Goodrich CompanyInventor: Ronald E. Myers
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Patent number: 5252684Abstract: The present invention relates to a method of preparing borazine modified hydridopolysilazane polymers. The method comprises reacting a hydridopolysilazane polymer with a material comprising at least one borazine ring for a time sufficient to produce the desired polymer. This invention also relates to the novel polymers produced by the above method.Type: GrantFiled: November 2, 1992Date of Patent: October 12, 1993Inventors: Gregg A. Zank, Larry G. Sneddon, Kai Su
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Patent number: 5128286Abstract: A shaped body is disclosed which comprises substantially amorphous, silicon nitride-based ceramic containing Si, N and B as essential components and O, C and H as optional components in amounts providing the following atomic ratios:N/Si: 0.05 to 2.5,B/Si: 0.01-3,O/Si: 2.0 or less,C/Si: 1.5 or less, andH/Si: 0.1 or less.Type: GrantFiled: June 18, 1990Date of Patent: July 7, 1992Assignee: Tonen CorporationInventors: Osamu Funayama, Mikiro Arai, Hiroyuki Aoki, Yuuji Tashiro, Toshio Katahata, Kiyoshi Sato, Takeshi Isoda, Tadashi Suzuki, Ichiro Kohshi
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Patent number: 5118774Abstract: Crosslinked random boron/nitrogen preceramic polymers are prepared by reacting (a) admixture of a trihalogenoborane A and a cyclic boron/nitrogen compound B containing recurring structural units of the following general formula (1): ##STR1## in which A is a halogen atom and R is a hydrogen atom, or a hydrocarbyl, organosilyl or hydrogenoorganosilyl radical, with (b) an amino compound C containing at least one --NH.sub.2 group; the resulting polymers are facilely pyrolyzed into boron nitride ceramic materials.Type: GrantFiled: January 22, 1991Date of Patent: June 2, 1992Assignee: Rhone-Poulenc ChimieInventors: Gerard Mignani, Jean-Jacques Lebrun
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Patent number: 5071935Abstract: Organometallic boron/nitrogen polymers, precursors of boron nitride, include recurring structural units of the formulae (I) and (II): ##STR1## wherein X is N-R.sup.3, Y is NR.sup.1 R.sup.2 and Z is N-R, in which R, R.sup.1, R.sup.2 and R.sup.3, which may be identical or different, are each a hydrogen atom, an optionally substituted hydrocarbon radical, or an organosilyl or hydrogenoorganosilyl radical and are prepared by reacting (a) at least one cyclic compound (compound A) containing recurring structural units of the formula (1): ##STR2## wherein A is a halogen atom and R is a hydrogen atom, an optionally substituted hydrocarbon radical, or an organosilyl or hydrogenoorganosilyl radical, with (b) at least one compound including at least one boron atom to which two halogen atoms are directly bonded (compound B), and (c) at least one compound containing at least one NH.sub.2 group compound C); the resulting organometallic polymers are facilely pyrolyzed into boron nitride ceramic materials.Type: GrantFiled: October 6, 1989Date of Patent: December 10, 1991Assignee: Rhone-Poulenc ChimieInventors: Pierre Ardaud, Gerard Mignani
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Patent number: 4987201Abstract: The present invention relates to a process for the production of an organoborosilicon preceramic polymer of the structure: ##STR1## wherein R.sup.1 is selected from alkyl having from 1 to 10 carbon atoms or phenyl, and x is selected from 0, 1, 2 or 3;which is pyrolyzable to produce a refractory material comprising inorganic compounds of Si, C and B, which process comprises:contacting a silicon containing compound of the structure:(R.sup.1).sub.x --Si (CH.dbd.CH.sub.2).sub.4-x or (R.sup.1).sub.x Si(C.dbd.CH).sub.4-xwith a boron containing compound selected from H.sub.3 B:BH.sub.3, H.sub.3 B:NH.sub.3, BH.sub.3 :N(R.sup.2).sub.3 wherein R.sup.2 is selected from methyl, ethyl, propyl, butyl or phenyl in an inert atmosphere at a temperature of between about 90.degree. and 170.degree. C. for between about 0.1 and 20 hr and recovering the prepolymer. The prepolymer is pyrolyzed to produce a ceramic article useful in high temperature (e.g., aerospace) or extreme environmental applications.Type: GrantFiled: June 5, 1989Date of Patent: January 22, 1991Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Salvatore R. Riccitiello, Ming-ta S. Hsu, Timothy S. Chen
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Patent number: 4731437Abstract: Organoboron nitride polymers are produced by polymerization of organoboron nitride compounds having a cyclic structure of the formula (XBNR).sub.3 wherein R represents hydrogen, a saturated or unsaturated alkyl group or an aryl group and X represents a primary, secondary or tertiary amino group or a silylamino group in the presence of at least one of amine compounds of the formula R.sup.1 NH.sub.2 and amine compounds of the formula R.sup.1 NHR.sup.2 wherein R.sup.1 and R.sup.2 which may be the same or different individually represent an alkyl, aryl or silyl group. The organoboron nitride polymers are suitable as a raw material for the production of boron nitride and as a binder for boron nitride powders.Type: GrantFiled: August 6, 1985Date of Patent: March 15, 1988Inventors: Taniguchi, Isoji, Yoshiharu Kimura, Yamamoto, Kenji
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Patent number: 4550151Abstract: The invention provides a novel organoborosilicon polymer comprising two types of the recurring monomeric units represented by the general formulas of, one, --SiR.sup.1.sub.2 --CH.sub.2 -- and, the other, --BR.sup.2 --NR.sup.3 --, in which R.sup.1, R.sup.2 and R.sup.3 are each a hydrogen atom or a monovalent hydrocarbon group. Such an organoborosilicon polymer is readily prepared by the thermal decomposition polymerization reaction of an organopolysilane compound and a borazine compound at 250.degree. to 500.degree. C. and useful as a precursor of an inorganic ceramic material or inorganic fibers or as a binder of ceramics.Type: GrantFiled: December 5, 1984Date of Patent: October 29, 1985Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Minoru Takamizawa, Taishi Kobayashi, Akira Hayashida, Yoshihumi Takeda
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Patent number: 4444972Abstract: Carboranylmethylene-substituted cyclophosphazenes which can be thermally polymerized into carboranylmethylene-substituted phosphazene polymers, useful as thermally stable coatings and, due to the characteristics of these polymers in acting as a ligand for transition metals, metallocarboranylmethylene phosphazene polymers which can act as immobilized catalyst systems, and are electrically conductive and superconductive.Type: GrantFiled: May 3, 1983Date of Patent: April 24, 1984Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Harry R. Allcock, Angelo G. Scopelianos
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Patent number: 4353999Abstract: Polymerable organic compounds and an epoxide compound are emulsified with aqueous alkali metal silicate solutions then polymerized with a catalyst such as a peroxide type catalyst thereby producing an alkali metal silicate organic plastic which may be used as an adhesive, as molding powder or reacted with an organic diisocyanide to produce polyurethane silicate resins and foams.Type: GrantFiled: March 18, 1982Date of Patent: October 12, 1982Inventor: David H. Blount
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Patent number: 4351915Abstract: 2,2,6,6-Tetramethyl-4-piperidyl spiro aliphatic ethers which are useful as stabilizers for organic polymeric materials, and have the general formula are disclosed: ##STR1## wherein: Y.sub.1 is ##STR2## A.sub.1, A.sub.2, A.sub.3, A.sub.4, A.sub.5, and A.sub.6 are groups which are defined in the specification, at least one pair of A.sub.1 and A.sub.2 ; A.sub.3 and A.sub.4 ; and A.sub.5 and A.sub.6 being taken together to form the group ##STR3## the groups R.sub.1, R.sub.2, R.sub.3 and Z as well as X, p, and m being as defined in the specification.Type: GrantFiled: May 26, 1981Date of Patent: September 28, 1982Assignee: Adeka Argus Chemical Co., Ltd.Inventors: Naohiro Kubota, Toshihiro Shibata, Kazuo Sugibuchi, Motonubu Minagawa
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Patent number: 4342673Abstract: Novel coating systems comprising high-solids content blends of epoxy prepolymers, a catalyst complex comprising a complex iodonium salt and a copper salt, and a conventional pigment. The compositions cure rapidly to highly chemically resistant, tough coatings.Type: GrantFiled: February 2, 1981Date of Patent: August 3, 1982Assignee: General Electric CompanyInventor: Austin A. Wolfrey
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Patent number: 4314917Abstract: Novel coating systems comprising high solids content blends of epoxy prepolymers and a catalyst complex comprising a complex iodonium salt, a copper salt, and a tin salt and a conventional pigment. The compositions cure rapidly to highly chemically resistant, tough coatings.Type: GrantFiled: February 12, 1980Date of Patent: February 9, 1982Assignee: General Electric CompanyInventor: Austin A. Wolfrey
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Patent number: 4288585Abstract: Carboranyl-substituted polyphosphazenes are prepared by heat polymerizing a carboranyl halocyclophosphazene at 250.degree. C. for about 120 hours in the absence of oxygen and moisture. The cyclophosphazene is obtained by allowing a lithium carborane, e.g. the reaction product of methyl-o-carborane with n-butyllithium in ethyl ether, to react with e.g. hexachlorocyclotriphosphazene at ambient temperatures and in anhydrous conditions. For greater stability in the presence of moisture, the chlorine substituents of the polymer are then replaced by aryloxy or alkoxy groups, such as CF.sub.3 CH.sub.2 O--.The new substantially inorganic polymers are thermally stable materials which produce a high char yield when exposed to extreme temperatures, and can thus serve to insulate less heat and fire resistant substances.Type: GrantFiled: March 12, 1980Date of Patent: September 8, 1981Inventors: Robert A. Administrator of the National Aeronatuics and Space Administration, with respect to an invention of Frosch, Harry R. Allcock, John P. O'Brien, Angelo G. Scopelianos, Larry L. Fewell
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Patent number: 4229560Abstract: A thermostable heterocyclic polymer constituted by monomer units of the general formula ##STR1## where R.sup.1 and R.sup.2 denote an organic radical having from 2 to 1000 carbon atoms;a radical having 2 to 1000 carbon atoms, containing:1 to 1000 atoms of Si,and/or 1 to 1000 atoms of F,and/or 1 to 1000 atoms of Cl,and/or 1 to 1000 atoms of Br,and/or 1 to 1000 atoms of N,and/or 1 to 1000 atoms of S,and/or 1 to 1000 atoms of P,and/or 1 to 1000 atoms of B,and/or 1 to 1000 atoms of O,R.sup.1 and R.sup.2 being either the same or different;R.sup.3 .dbd.NH, CH.sub.2 ;R.sup.4 is a radical which, with R.sup.3 .dbd.NH, may be ##STR2## while with R.sup.3 .dbd.CH.sub.Type: GrantFiled: May 30, 1978Date of Patent: October 21, 1980Inventors: Alexei Y. Chernikhov, Mikhail N. Yakovlev, Valentina B. Lysova, Evgeny L. Gefter, Nina N. Shmagina