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| Number | Title | Issue Date |
| 7378449 | Poly(bromoaryl)alkane additives and methods for their preparation and use An additive mixture useful as a flame retardant is described. The mixture is comprised of (i) a poly(bromophenyl)alkane having in the molecule in the range of 13 to 60 carbon atoms and in the range of two to four aryl groups and (ii) a poly(bromophenyl)bromoalkane h... | 05/27/2008 |
| 7312350 | Process for preparing arylalkynes The invention relates to a process for preparing arylvinyl halides and sulphonates and arylalkynes by reacting haloaromatics or aryl sulphonates with vinyl halides or sulphonates in the presence of a palladium catalyst and a base and, if appropriate, subsequent elim... | 12/25/2007 |
| 7255927 | Laminate composition This invention concerns a thermosetting resin system that is useful in the manufacture of high performance prepreg, laminate and composite materials as well as, prepregs, laminates and composites made from the thermosetting resin composition. ... | 08/14/2007 |
| 7179950 | Bromination process This invention relates to a novel process which comprises feeding a mixture formed from diphenylethane and bromine to a stirrable reaction mass comprised of bromine and a bromination catalyst to yield a decabromodiphenylethane wet cake which can be most economically... | 02/20/2007 |
| 7109387 | Production of α-chloroisopropyl-substituted aromatics α-Chloroisopropyl-substituted aromatics are obtained in high yield by treating isopropenyl-substituted aromatics with hydrogen chloride gas in the absence of a solvent. The α-chloroisopropyl-substituted aromatics serve as initiators for the cationic polymerization... | 09/19/2006 |
| 7090924 | Thermosetting resin composition for high performance laminates This invention concerns a thermosetting resin system that is useful in the manufacture of high performance prepreg, laminate and composite materials as well as the prepregs, laminates and composites made from the thermosetting resin composition. ... | 08/15/2006 |
| 7060862 | Method for the preparation of α,α,α′,α′-tetrachloro-p-xylene with high purity A method of synthesizing a high purity product of α,α,α′,α′-tetrachloro-p-xylene is disclosed. The method includes carrying out a first stage reaction of terephthaldicarboxaldehyde with a mixture of SOCl2 and dimethylformamide (DMF) to obtain a pr... | 06/13/2006 |
| 6992231 | Method for the preparation of α,α, α′,α′-tetrachloro-p-xylene A synthesis method of α,α,α′,α′-tetrachloro-p-xylene is disclosed. The method includes reacting terephthaldicarboxaldehyde with a mixture of SOCl2 and dimethylformamide (DMF) to obtain a product mixture containing α,α,α′,α′-tetrachloro-p-x... | 01/31/2006 |
| 6958423 | Bromination process This invention relates to a novel process which comprises feeding a mixture formed from diphenylethane and bromine to a stirrable reaction mass comprised of bromine and a bromination catalyst to yield a decabromodiphenylethane wet cake which can be most economically... | 10/25/2005 |
| 6844032 | Liquid crystal compounds having bis(trifluoromethyl) phenyl rings, liquid crystal compositions and liquid crystal display devices The compound (1) having 2,3-bis(trifluoromethyl)-1,4-phenylene is stable chemically and has excellent miscibility with other liquid crystal compounds, large and negative dielectric anisotropy and proper optical anisotropy. A liquid crystal composition comprising the... | 01/18/2005 |
| 6841707 | Method and apparatus for producing decabromodiphenyl alkanes A method of producing decabromodiphenyl alkanes includes the steps of charging a reaction vessel with bromine and a bromination catalyst and introducing a diphenyl alkane into the vessel at a location above the level of the charge bromine and catalyst. A dip tube ap... | 01/11/2005 |
| 6753444 | Method for producing 2,3,5,6-tetrahalogen-xylyidene compounds The invention relates to a process for preparing 2,3,5,6-tetrahaloxylylidene compounds of formula (I) where each Hal is independently fluorine or chlorine, and X is fluorine, chlorine, bromine, —O—R, or —O—C(═O... | 06/22/2004 |
| 6743825 | Poly(bromoaryl)alkane additives and methods for their preparation and use An additive mixture useful as a flame retardant is described. The mixture is comprised of (i) a poly(bromophenyl)alkane having in the molecule in the range of 13 to 60 carbon atoms and in the range of two to four aryl groups and (ii) a poly(bromophenyl)bromoalkane h... | 06/01/2004 |
| 6610219 | Functional materials for use in optical systems Functional optical materials for optical systems that are typically useful in optical waveguides, optical switching systems, optical modulators, optical computing systems and the like. Included are polymer systems and electrooptical chromophores. Polymers... | 08/26/2003 |
| 6407298 | Process for the preparation of (p-chlorophenyl)propanol derivatives A process for the preparation of an alcohol compound (1), characterized by subjecting p-iodochlorobenzene to Pd coupling with allyl alcohol in the presence of tetramethylammonium chloride, followed by reduction, and a process for the preparation of a comp... | 06/18/2002 |
| 6403789 | Method of halogenating hydroxyl group A halogenating agent of the formula (1) and a method of halogenating hydroxyl group ##STR1## wherein R1 and R2 are the same or different and are each ethyl, propyl, isopropyl, butyl, isobutyl or allyl; X is chlorine atom or bromine ... | 06/11/2002 |
| 6384289 | Process for production of 1,4-bis(difluoroalkyl)benzene derivative A process is provided which allows a 1,4-bis(difluoroalkyl)benzene derivative to be produced inexpensively by a simple procedure without requiring any special facility. This process comprises causing a compound (A) of the following formula (1): ##STR... | 05/07/2002 |
| 6329529 | Nitrogen-based halogenating agents and process for preparing halogen-containing compounds Disclosed are a fluorinating agent represented by the general formula (1): ##STR1## wherein R1 to R4 are a substituted or unsubstituted, saturated or unsaturated alkyl group or a substituted or unsubstituted aryl group, and can be th... | 12/11/2001 |
| 6313337 | Method of making benzoyl halides and nitriles A method of making a benzoyl halide is disclosed. Into a reactor is placed a reaction mixture of a benzotrihalide and a benzaldehyde having the respective general formulas ##STR1## where each A is independently selected from halogen, CF3, R, or... | 11/06/2001 |
| 6194567 | Halogenating agent and process for halogenating hydroxyl group A halogenating agent of the formula (1) and a method of halogenating hydroxyl group ##STR1## wherein R1 and R2 are the same or different and are each ethyl, propyl, isopropyl, butyl, isobutyl or allyl; X is chlorine atom or bromine ... | 02/27/2001 |
| 6133468 | Method for preparing substituted benzyl bromides Substituted benzyl bromides of the formula I ##STR1## where at least one substituent R1-5 is an electron-attracting group such as fluorine, chlorine, bromine, C1 -C4 -alkoxycarbonyl, cyano or nitro, and the other subs... | 10/17/2000 |
| 6063852 | Brominated polyphenylmethanes, process for their preparation and fire retardant compositions containing them Novel brominated polyphenylmethanes, such as poly(tetrabromobenzyl bromide), are provided in a one step process by reacting a benzyl halide and bromine in the presence of a Friedel Crafts catalyst. The brominated polyphenylmethanes can be added to flammab... | 05/16/2000 |
| 5981789 | Preparation of nuclear chlorinated aromatic compounds Disclosed is a method of preparing an aromatic compound having the general formula ##STR1## where R is CF3, OCF3, OC2 F5, CN, NCO, or COCl, m is 0, 1, or 2, n is 0, 1, or 2, q is 1 or 2, and q+m+n is an int... | 11/09/1999 |
| 5977419 | Process for the preparation of substituted phenylpropenes The invention relates to novel processes for the preparation of phenyl acetic acid derivatives of the formula (I) some of which are known ##STR1## in which R1, R2 and R3 independently of each other each represent hydr... | 11/02/1999 |
| 5504173 | Chemical process Process for preparing the (E)-isomer of a compound (II) by contacting the (E) or (Z) isomer of the 2-methylphenyl precursor, or a mixture of both, with bromine in an organic solvent, in the presence of a polymeric base and light. ##STR1##... | 04/02/1996 |
| 5489717 | Glutamate (NMDA) receptor antagonists Novel naphthyl-substituted -amino acid derivatives, pharmaceutical compositions containing the same and a method of using the same, for the blockade of aspartate and glutamate receptors, are described. Novel intermediates of the napthyl-substituted... | 02/06/1996 |
| 5487846 | Rust inhibitor A general-purpose organic rust initiator which can effectively prevent corrosion of metals comprising a compound of formula (1): ##STR1## wherein R1 is a perfluoroalkyl group having 1 to 6 carbon atoms; R2 is a hydrogen atom or ... | 01/30/1996 |
| 5449801 | Reactive distillation process for free radical halogenation A process for the selective high yield halogenation R--CH3 wherein R is ##STR1## Si(Cl)m (CH3)n, wherein m is 1 to 3, n is 1 to 3 and m+n is 3; phenyl; or phenyl substituted with Cl, Br, F, OR1, ... | 09/12/1995 |
| 5401890 | Process and apparatus for heat treating halogenated compounds This invention relates to an improved process and apparatus for preparing a product predominant in decabromodiphenylethane, the process comprising heat treating the product in a product treating and storage system for a period of time and at a temperature... | 03/28/1995 |
| 5371284 | Phenyl acetylenic acetals Phenyl acetylenic acetals and thioacetals and their use in the treatment of allergy, asthma, inflammation, arthritis, hyperproliferative skin disease, psoriasis or contact dermatitis are disclosed. Also disclosed are intermediates useful for producing sai... | 12/06/1994 |
| 5334370 | Compositions of alkylbenzenes in film-forming materials for visualization of the gastrointestinal tract Disclosed are x-ray contrast compositions for oral or retrograde examination of the gastrointestinal tract comprising a polymeric material capable of forming a coating on the gastrointestinal tract and an x-ray producing agent of the formula ##STR1##... | 08/02/1994 |
| 5308607 | Compositions of alkylbenzenes for visualization of the gastrointestinal tract using X-ray contrast Disclosed are contrast agents of the formula ##STR1## contained in aqueous compositions and methods for their use in diagnostic radiology of the gastrointestinal tract wherein R=C1 -C25 alkyl, cycloalkyl, unsaturated allyl or ha... | 05/03/1994 |
| 5302768 | Process for decarbromodiphenylalkane predominant product This invention relates to a process for preparing a white or at least near white product which is predominant in decabromodiphenylalkane, and which contains a minor amount of dodecabromodiphenylalkane.... | 04/12/1994 |
| 5188759 | Haloacetylene derivatives The invention relates to a liquid crystalline medium having at least two components, where at least one component is a haloacetylene derivatives of the formula I R1 --A1 --Z1 --(A2 --Z2)m --A | 02/23/1993 |
| 5136107 | Process for halogenating aromatic compounds A process for producing a mixture of ar-brominated polyphenyl compounds with an average of from about 3 to about 4 bromine atoms per aromatic ring utilizing a novel catalytic system for at least a portion of the bromination reaction so as to obtain an ar-... | 08/04/1992 |
| 5126461 | Process for opening cyclopropane rings Process for ring opening compounds of the formula ##STR1## in which R1 is heteroaryl or aryl, R2 is a leaving group, R3, R4, R5 and R6 are independently selected from hydrogen, alkyl, ... | 06/30/1992 |
| 5064518 | Method for the selective alpha halogenation of alkylaromatic compounds Inorganic and organic hypohalites are used to obtain good selectivity to alpha halogenation of alkyl aromatic compounds. Alkali and alkaline earth hypohalites must be used in conjunction with a phase transfer medium. Useful organic hypohalites are the ter... | 11/12/1991 |
| 5053162 | Difluoroalkylcyclohexylbenzonitrile derivative A liquid crystalline compound having a small Ɗn value; suitable for preparing a liquid crystal display element having a broad viewing angle; having a large positive Ɗ&3xb5; value; and suitable for preparing a liquid crystal composition having a low driv... | 10/01/1991 |
| 4992151 | Method for the selective alpha halogenation of alkylaromatic compounds Inorganic and organic hypohalites are used to obtain good selectivity to alpha halogenation of alkyl aromatic compounds. Alkali and alkaline earth hypohalites must be used in conjunction with a phase transfer medium. Useful organic hypohalites are the ter... | 02/12/1991 |
| 4956055 | Preparation of bidentate ligands A process is disclosed for preparing bidentate ligands of the formula: ##STR1## wherein: each Ar is independently selected from aromatic ring compounds having 6 up to 14 carbon atoms, e.g., phenyl, naphthyl, phenanthryl and anthracenyl; the x bonds a... | 09/11/1990 |
