Abstract: A high-efficiency organic luminous element by which blue luminescence with high luminance and high color purity becomes possible, which comprises at least one compound represented by general formula (A): wherein Ra, Rb, Rc and Rd each represents a hydrogen atom or a substituent group, with the proviso that at least one substituent group of Ra, Rb, Rc and Rd is a group represented by general formula (B): wherein Re and Rf each represents a hydrogen atom or a substituent group, and Ara represents an aryl group, a heteroaryl group or an alkenyl group; and when at least two substituent groups of Ra, Rb, Rc and Rd are groups represented by general formula (B), the groups represented by general formula (B) may be the same or different.

Abstract: Silane compositions are described which comprise (A) a silane coupling agent; and (B) a tris(silylorgano)amine or alkane characterized by the formulae [(RO)3SiR1]3N  (I) or [(RO)3SiR1]3CR2  (II) wherein each R is independently an alkyl, alkoxyalkyl, aryl, aralkyl or cycloalkyl group of less than 20 carbon atoms; R1 is a divalent hydrocarbon or polyether group of less than 20 carbon atoms; and R2 is a functional group represented by CnH2nX wherein n is from 0 to 20 and X is selected from the group consisting of amino, amido, hydroxy, alkoxy, halo, mercapto, carboxy, acyl, vinyl, allyl, styryl, epoxy, isocyanato, glycidoxy, and acryloxy groups. The silane compositions of the present invention are adhesive compositions providing improved bonding of surfaces such as glass, metal and metal oxides to thermosetting resins. The silane compositions also exhibit improved moisture resistance.

Abstract: A Heat-curable silicone rubber composition comprising (A) 100 weight parts organopolysiloxane with the average unit formula RXSiO(4−x)/2 each R is independently selected from the group consisting of hydroxyl and substituted and unsubstituted monovalent hydrocarbon groups and x has a value from 1.9 to 2.1 and containing at least 2 silicon-bonded alkenyl groups in each molecule, (B) 10 to 100 weight parts reinforcing filler, (C) 0.1 to 10 weight parts carboxiloxane dendrimer that contains at least 3 silicon-bonded hydrogen atoms in each molecule, and (D) 0.1 to 10 weight parts organoperoxide.

Abstract: Precursor materials useful for making organic electroluminescent devices such as anthracene derivatives having the structure: ##STR1## R.sub.40 -R.sub.43 and R.sub.44 -R.sub.47 are selected independently from the group consisting of hydrogen, alkyl, aryl, heteroalkyl, heteroaralkyl, nitro, cyano, hydroxy, alkoxy, aryloxy, thio, alkylthio, arylthio, amino, halogen, dialkylamino, diarylamino, diaralkylamino, arylamino, alkylamino, arylalkylamino, carbonyloxy, carbonylalkoxy, carbonylalkyloxy, alkylcarbonyloxy, arylcarbonyloxy, alkoxylcarbonyloxy, sulfonyl, sulfonyloxy. R.sub.48 and R.sub.49 are selected independently from the group consisting of trialkoxysilyl, dialkoxysilyl, trichlorosilyl, dichlorosilyl, heptachlorotrisiloxy, and pentachlorodisiloxy.

Abstract: A process for preparing bis-cyclopentadienyl compounds bridged by a methylene group is reported, said process comprising reacting formaldehyde with a cyclopentadienyl compound in the presence of a base and of a solvent having a dielectric constant (.epsilon.), measured at 25.degree. C., higher than 7. The bridged compounds, obtainable in high yields with this simple single-step process, can be used to prepare ansa-metallocenes, active as catalyst components in the polymerization of olefins.

Abstract: The following class of glycidyl and allyl ethers are found to cure at room temperature much faster than their glycidyl and allyl analogs: ##STR1## where: R.sub.1 is selected from the group consisting of:(a) an aliphatic hydrocarbon group containing 2 to 10 carbon atoms; and(b) a group having the formula ##STR2## wherein n=1 to 3,m=0 to 5R.sub.2 and R.sub.2 ' are each selected from the group consisting of an alkyl group containing 1 to 4 carbon atoms, an unsubstituted aryl group, and a substituted aryl group, and R.sub.

Abstract: An organic silicon polymer is purified by washing at least once a solution of an organic silicon polymer with aqueous hydrochloric acid having a concentration of at least 0.001 N, and washing the solution at least twice with ultrapure water having a resistivity of at least 10 M.OMEGA./cm. Metal impurities can be removed from the organic silicon polymer to a sufficient level for use as electronic material without detracting from the polymer's own properties.

Abstract: It is possible to prepare in high yield and purity the racemic and meso forms of bridged chiral metallocenes with a stereoselective method, by synthesizing the sylil-, germyl- or stannyl-substituted ligands. These compounds can be prepared in their racemic and meso forms, and then selectively transformed in the corresponding metallocenes.

Abstract: Carborane-silane/siloxane compounds having unsaturated organic end groups e represented by the formula: ##STR1## wherein: u and x are independently selected positive integers, v and w are independently selected integers greater than or equal to zero, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are independently selected from the group consisting of alkyl, aryl, alkylaryl, haloalkyl, haloaryl and mixtures thereof; A and E are independently selected from the group consisting of O, an aliphatic bridge, an aryl bridge and mixtures thereof; and R.sup.9 and R.sup.10 are unsubstituted or substituted vinyl or ethynyl groups.

Abstract: Photoluminescent polydisilacyclobutanes are made by reacting a dialkenyldihalocarbosilane with an organolithium reagent in the presence of a solvent at 0-25 .degree. C.

Abstract: The present invention relates to new carbosilane dendrimers comprising Si--O-metal bonds, to a method of preparing them and to their use.

Abstract: Novel methods and compositions for improving the flame retardant capabilities of aromatic-based polymers like polycarbonate are disclosed. Other important polymer properties are substantially maintained, such as transparency. One aspect of the invention is directed to a flame retardance additive which comprises a copolymer of an aryl-containing silicone compound and a diorganic polysiloxane compound. In some preferred embodiments, the aryl-containing silicone compound is triphenyl- or diphenyl-based. This invention is also directed to new polymer compositions, which comprise an aromatic-based polymer and the flame retardance additive described above. The polymer compositions can be molded into a variety of articles which have a very useful combination of properties.

Abstract: The present invention relates to a process for the preparation of SiOH-functional carbosilane dendrimers.

Abstract: This invention relates to a new class of novel linear inorganic-organic hybrid polymers of varying molecular weight that are useful for making high temperature, oxidatively stable thermosets, and these novel linear polymers are in themselves oxidatively stable at high temperatures between 600.degree.-1000.degree. C. These new materials have repeat units that contain at least one alkynyl group and at least one siloxanyl group within the backbone of these novel linear polymers. These novel linear polymers can be further polymerized to form thermosets and ceramics.

Abstract: The present invention provides asymmetric bidentate silane reagents from modifying the surface of liquid chromatography supports, the supports and methods of making and using the same. When bonded to the surface of a support material, the resulting modified support material provides improved properties, such as better separations and more stable support materials, especially when used in liquid chromatography. These bidentate silanes have the general structure: R.sub.1 SiMe(NMe.sub.2)--(CH.sub.2).sub.n --SiMeR.sub.2 (NMe.sub.2). R.sub.1 is an alkyl group having from 1 to 30 carbon atoms, and R.sub.2 is an alkyl group having from 8 to 18 carbon atoms. R.sub.1 is a different alkyl group than R.sub.2. Me is a methyl group, and n has a value 2 or 3. In certain embodiments, R.sub.2 includes at least one functional group. When reacted with a silica surface, the resulting modified surface has a structure: PSiO--?R.sub.1 SiMe--(CH.sub.2).sub.n --SiMeR!--OSiP. PSiO is a surface reacted silica.

Abstract: Utilization of thermodynamic ratios to produce pure rac and pure meso isomers or a mixture thereof.

Abstract: Photoluminescent bicyclic polydisilacyclobutanes are made by reacting a dialkenyldihalocarbosilane with an organolithium reagent in the presence of a solvent at 0.degree.-25.degree. C.

Abstract: Non-naturally occuring dynemicin analogs are provided, which are useful as DNA cleaving agents, cytotoxic agents, and/or anti-tumor compounds. Methods of making dynemicin analogs are also provided.

Abstract: This invention pertains to polycarbosilane hydroxides which contain units of the formula ##STR1## where R is a hydrocarbon having from 1 to 20 carbon atoms and to methods for their manufacture. The polycarbosilane hydroxides may be prepared by the oxidation of a polycarbosilane.

Abstract: A method for preparing an .alpha.,.omega.-silyl terminated branched polyalkenylenes and polyolefins is provided. The method involves:(I) reacting a mixture comprising(A) at least one branched acyclic diene, and(B) at least one alkenylsilane in the presence of an acid free metathesis catalyst system to produce an .alpha.,.omega.-silyl terminated branched polyalkenylene; or(I) reacting a mixture of(A) at least one cycloolefin, and(B) at least one alkenylsilane in the presence of an acid free metathesis catalyst system to produce an .alpha.,.omega.-silyl terminated branched polyalkenylene. The .alpha.,.omega.-silyl terminated branched polyalkenylene produced by these methods may be hydrogenated to produce an .alpha.,.omega.-silyl terminated branched polyolefin.

Abstract: Polyalkylated benzenes containing chlorosilyl groups represented by formula III ##STR1## wherein R.sub.1 represents hydrogen or alkyl; R.sub.2 represents hydrogen or alkyl; R' represents methyl or chloro; and n=3-6.

Abstract: Organosilicon compounds are described which contain a cyclic organic moiety between at least two reactive silane groups. The compounds are useful in coatings, adhesives, and sealants, and the like.

Abstract: The present invention is a compound having the formula:R.sup.1 --Ac.sup.1 --Ar.sup.1 --M--Ar.sup.2 --Ac.sup.2 --R.sup.2where R.sup.1 and R.sup.2 are independently selected from the group consing of hydrogen, unsubstituted alkyl groups, substituted alkyl groups, unsubstituted aryl groups, and substituted aryl groups, where Ac.sup.1 and Ac.sup.2 are independently selected alkynyl groups having at least 1 carbon-carbon triple bond, where Ar.sup.1 and Ar.sup.2 are independently selected substituted or unsubstituted aromatic diradicals, and where M has the structure ##STR1## where m is a positive integer, wherein x, p, y, r, n, and z are independently selected integers, where z.noteq.0 when n.noteq.0, and where R.sup.3 through R.sup.14 are independently selected from the group consisting of hydrogen, unsubstituted alkyl groups, substituted alkyl groups, unsubstituted aryl groups, and substituted aryl groups.

Abstract: The present invention relates to novel functional carbosilane-dendrimers, organic-inorganic carbosilane-hybrid materials, methods for manufacturing them, methods for manufacturing coatings from the functional carbosilane-dendrimers and the use thereof.

Abstract: Cyclopentadineyl compounds of the formula II ##STR1## and formula III ##STR2## their preparation and their use as intermediates in the preparation of metallocene complexes of the formula I.

Abstract: In order to reduce the rate of coke formation during the industrial pyrolysis of hydrocarbons, the interior surface of a reactor is coated with a thin layer of a ceramic material, the layer being deposited by thermal decomposition of a non-oxygen containing silicon-nitrogen precursor in the vapor phase, tin an inert or reducing gas atmosphere in order to minimize the formation of oxide ceramics.

Abstract: A multifunctional initiator is prepared by contacting an organo-alkali metal compound with a silane represented by the formula: ##STR1## wherein the R' are generally lower alkyl groups such as methyl and the R" is generally an .paren open-st.CH.sub.2 .paren close-st..sub.n group with n=2. Superior results are obtained presumably because of the separation of the vinyl groups and the greater solubility of the compound because of the R' groups. The resulting catalyst initiates polymerization of monomers such as conjugated dienes and monovinyl substituted aromatic compounds to give relatively monodispersed polymers with little or no crosslinking.

Abstract: A process for the preparation of alkylsilanes and alkenyl silanes by hydrosilylation of their corresponding silanes and unsaturated hydrocarbons in the presence or absence of a catalyst. A process for the preparation of polyalkenylsilanes (some of which are novel high molecular compounds) by the anionic coordination polymerization, radical polymerization or ionic polymerization of the alkenylsilanes. A process for the production of silicon carbide by using these polyalkenylsilanes as prepolymers.

Abstract: Metallocene complexes of the general formula I ##STR1## where the substituents Y, M, x, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.6, R.sup.7, R.sup.8, and R.sup.9 are as described in the disclosure, and ligand systems of the general formula II ##STR2## as intermediates.

Abstract: Bis(bis-silylalkyl) dicarboxylates, especially maleates and fumarates, are prepared by a three-step process including esterification of malaic or fumaric acid or a functional derivative thereof with a branched dienol such as 1,6-heptadien-4-ol to form an alkadienol ester, reaction of the olefinic groups in said ester with a chlorosilane and alcoholysis of the chlorine atoms attached to silicon. The products are useful as adhesion promoters in addition curable polyorganosiloxane compositions.

Abstract: Single component inorganic/organic network materials incorporating the physical properties of glasses with the flexibility of organic materials of empirical formula X(SiO.sub.1.5).sub.n wherein X is one or more flexible organic linkages and n is greater than or equal to 2, as well as precursors thereof, are disclosed.

Abstract: There is disclosed an improved method for preparing a hybrid organodisilanol compound having the formulaHO--R.sup.1 R.sup.2 SiC.sub.n H.sub.2n RC.sub.n H.sub.2n SiR.sup.1 R.sup.2 --OH (I)said method comprising:(A) reacting a dihydridosilane of the formulaR.sup.1 R.sup.2 SiH.sub.2 (II)with a diene of the formulaC.sub.n H.sub.2n-1 RC.sub.n H.sub.2n-1 (III)to provide a dihydrido compound of the formulaH--R.sup.1 R.sup.2 SiC.sub.n H.sub.2n RC.sub.n H.sub.2n SiR.sup.1 R.sup.2 --H (IV); and(B) reacting said dihydrido compound (IV) with a buffered water solution in the presence of a palladium catalyst.

Abstract: This invention relates to bis(dichloroorganosilyl)alkenes represented by the formula III and a process for the preparation of the compounds of formula III which comprises hydrosilylating bis(dichlorosilyl)methanes of formula I with organoolefins or organosilylolefins of formula II in the presence of chloroplatinic acid catalyst; ##STR1## wherein R.sup.1 and R.sup.2 are same or different and can be --(CH.sub.2).sub.2 R.sup.3 (wherein R.sup.3 represents Ph, --CH.sub.2 Cl, --(CH.sub.2).sub.y CH.sub.3 (y=0-15), --CF.sub.3, --CH.sub.2 CF.sub.3, --SiMe.sub.m Cl.sub.3-m (m=0-3), --CN, --CH.sub.2 CN, --(p-Ph)CH.sub.2 Cl or 3-cyclohexenyl group) or (X--Ph)CH(CH.sub.3)CH.sub.2 -- (wherein X represents hydrogen, C.sub.1 -C.sub.4 alkyl, phenyl, fluoro, chloro or bromo group); or R.sup.1 is --CH.sub.3 or --(CH.sub.2).sub.2 R.sup.3 (wherein R.sup.3 is same as defined above) and R.sup.2 is (X--Ph)CH(CH.sub.3)CH.sub.2 -- (wherein X is same as defined above); A is --(CH.sub.2).sub.n -- (n=1, 2, 3, 6, 8), or --(CH.sub.2).sub.

Abstract: Fluorinated silylated aromatic compounds, their intermediates, methods of use in treating diseases associated with deficiencies of cholinergic transmission in the central nervous system and methods for their preparation are disclosed.

Abstract: This invention includes di- and tri(alkoxysilylalkyl)- or haloalkoxysilylalkylcyclic pentanes, which may have substituents thereon, including vinyl groups, and their use as waterproofing agents, as crosslinking agents in room temperature vulcanizing silicone caulks, in coating compositions and as surface treatments. The cyclic hydrocarbons are pentane (C.sub.s). The silane groups are attached to the ring through an alkyl group, which may have substituents thereon. Multiple silane groups may be attached to the ring. The silanes may have the standard substituents thereon, including alkoxy and halogens.The specific silanes contemplated herein have the following formula:R.sub.a X.sub.3-a Si(CR'.sub.2).sub.n !.sub.b cycloC.sub.5 R".sub.

Abstract: The present invention relates to organosiloxane compositions that are reaction products of 1) a silane containing at least 3 hydrolyzable groups per molecule, 2) a monohydric or polyhydric alcohol containing at least one organofunctional group and 3) a polyhydric alcohol containing no organofunctional groups or ethylenic unsaturation, wherein said reaction products contain at least two silicon atoms. The organosiloxane compositions are particularly useful as adhesion promoting additives for curable organosiloxane compositions, particularly those that cure by a platinum group metal-catalyzed hydrosilation reaction.

Abstract: A novel fluorinated organosilicon compound, exhibiting excellent solvent resistance, chemical resistance and mold release, which is represented by general formula (1): ##STR1## wherein Rf is a divalent group represented by general formula (2): ##STR2## wherein Y is a fluorine atom or CF.sub.3 group; l is an integer of 0-8; k and m are integers of 0-4; j and n are integers of 0 or 1; except when j=k=l=m=n=0.

Abstract: The present invention relates to an improved method for preparing a fluorinated silane having the formulaR.sup.1.sub.4 Si (I)or the formulaR.sup.2.sub.3 Si(R.sup.3 SiR.sup.4.sub.2).sub.z R.sup.3 SiR.sup.2.sub.3(II)said method comprising reacting the corresponding halide-functional or alkoxy-functional silane with lithium aluminum hydride or sodium borohydride to form a hydride-functional silane and then reacting the latter with a vinyl-terminated fluorotelomer or an allyl-terminated fluorotelomer, wherein at least three R.sub.1 of said silane (I), at least two of the R.sup.2 and at least one R.sup.4 of said silane (II) are selected from derivatives of fluorotelomers or fluorocotelomers, z has an average value of 0 to 4 and R.sup.3 is a derivative of an alkylene-terminated telechelic divalent telomer or cotelomer.

Abstract: There is disclosed a method for effectively producing a silicon-containing pentacyclic compound, wherein the method comprises reacting (a) a 1,2-bis(hydrosilyl)benzene with (b) a cyclic diyne in the presence of (c) a platinum compound. There is also disclosed a method for effectively producing a silicon-containing ladder polymer having a complete ladder structure, wherein the method comprises reacting (a) a 1,2,4,5-tetrakis(hydrosilyl)benzene with (b) a cyclic diyne in the presence of (c) a platinum compound.

Abstract: A process for synthesizing enediynes is provided. Specifically, the formed enediynes contain a hex-3-ene-1,5-diynyl group. Production of the enediynes involves adding a base to a propargylic halide in the presence of a chelating agent, which causes a carbenoid coupling-elimination sequence of the propargylic halides. A carbenoid destabilizing agent can also be added to the reaction mixture in order to enhance yield. Acyclic and cyclic enediynes can be synthesized according to this process. The enediynes are useful compounds that can be used in a variety of applications including use in the production of anti-tumor agents.

Abstract: This invention is directed to the use of polysiloxane acrylates in solid electrolytes containing a solid polymeric matrix. The solid electrolytes are used in electrochemical cells for secondary batteries.

Abstract: Adhesion additives for curable organosiloxane compositions comprise (I) a silane containing at least one alkoxy or enoloxy group, the remaining valences of the silicon atom being satisfied by groups bonded to silicon through oxygen and containing at least one H.sub.2 C.dbd.CR-- radical, where R is hydrogen or monovalent hydrocarbon, and (II) at least one organosilicon compound comprising (a) at least one group capable of participating in a hydrosilation reaction, and (b) at least one silicon-bonded alkoxy, enoloxy or silanol group.

Abstract: Silicon-containing organic compounds useful as starting materials of functional polymer materials, as well as a process for preparing the same, are provided. The silicon-containing organic compounds are represented by the following general formula: ##STR1## where R.sup.1 is a .pi. conjugated type divalent organic group having 2 to 30 carbon atoms, R.sup.2 is a hydrocarbon group having 1 to 30 carbon atoms, X.sup.1 is a halogen atom, m and n satisfy the conditions of 1.ltoreq.m.ltoreq.2 and n.gtoreq.2, respectively. A compound of the above general formula is prepared by reacting an organometallic compound of the following general formula:M.sup.1 -R.sup.1 -M.sup.2where M.sup.1 and M.sup.2 are each a metal selected from Group 1, 2 and 12 metals in the Periodic Table, with a silane compound of the following general formula: ##STR2## where R.sup.2 is a hydrocarbon group having 1 to 30 carbon atoms, X.sup.1, X.sup.2 and X.sup.3 are each a halogen atom.

Abstract: Alkenylchlorosilane of formula I and a direct synthesis thereof are disclosed, wherein silicon metal is reacted with mixed gas comprising alkenyl chloride of formula II and hydrogen chloride or alkyl chloride of formula III in the presence of copper catalyst at a temperature range from 220.degree. C. to 350.degree. C. ##STR1## In formula I, R.sub.1 represents hydrogen, methyl, SiHCl.sub.2, SiCl.sub.3 or CH.sub.2 SiCl.sub.3 and R.sub.2 represents hydrogen or chlorine. ##STR2## In formula II, R.sub.3 represents hydrogen or chlorine and R.sub.2 represents hydrogen, methyl or CH.sub.2 Cl.Cl--R.sub.5 (III)In formula III, R.sub.5 represents hydrogen, C.sub.1 -C.sub.4 alkyl or CH.sub.2 CH.sub.2 Cl.

Abstract: The present invention relates to a method for preparing a platinum-organosiloxane complex which comprises (I) reacting (a) a platinous halide having an average crystal size of less than 2500 Angstroms and (b) an organosiloxane having from 2 to 4 silicon- bonded organic groups having from 2 to 6 carbon atoms and having terminal olefinic unsaturation, the remaining silicon- bonded organic substituents being selected from alkyl groups having from 1 to 6 carbon atoms and phenyl groups, wherein said reaction is carried out in the presence of a polar organic liquid which is at least a partial solvent for platinous halide, and (II) neutralizing the reaction mixture of (I). The complexes of the instant invention are useful as catalysts for hydrosilylation reactions.

Abstract: A process for preparing 1.alpha.,25(R),26-trihydroxy-22E-ene-cholecalciferol and 1.alpha.,25(S),26-trihydroxy-22E-ene-cholecalciferol.

Abstract: Chloromethyltrichlorosilane is converted to polychlorocarbosilane and in turn to a polycarbosilane polymer that has utility as a precursor to silicon carbide ceramics.

Abstract: There is provided a process for preparing a hydrogensiloxane of the following general formula (2): ##STR1## wherein Rf is a perfluoropolyether or perfluoroalkylene group, n is equal to 1, 2 or 3, and p is equal to 0 or 1, said process comprising the step of hydrolyzing a chlorosilane of the following general formula (1): ##STR2## wherein Rf, n and p are as defined above, along with 1,1,3,3-tetramethyldisiloxane.

Abstract: According to the present invention, a lamination of organic monomolecular films is formed by a chemical adsorption technique. The representative example of the chemical adsorbent used in this invention is a hydrocarbon having trichlorosilyl group at one molecular end, and dialkylsilyl group at the other end. This chemical adsorbent binds to a base plate through silioxane linkage to form a first monomolecular film. It also binds to the first monomolecular film through siloxane linkage to form a second monomolecular film. As a result, a lamination of organic monomolecular films with desirable properties can be formed.

Abstract: Coupling agent and primer compositions comprising a conventional silane coupling agent (1), and a disilyl crosslinker compound (II) of the general formula(RO).sub.3 SiR'Si(OR).sub.3where RO denotes a hydrolyzable group, R' denotes a divalent organic radical, and the weight ratio of (I) to (II) is between 1:99 and 99:1 inclusive.