Patents Assigned to Bromine Compounds Ltd.
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Publication number: 20070167550Abstract: The present invention provides a polymer, an aqueous suspension of a polymer, methods for obtaining them, and fire-retardant products comprising a polymer and antimony oxide. The polymer of the invention is made of (i) at least one non-brominated monomer and (ii) at least one brominated monomer having the structure A-B-C, wherein A is a phenyl, substituted with 3-5 bromine atoms, B is a C1 to C4 alkyl, optionally substituted with 1 to 8 bromine atoms, and C is an acrylic or methacrylic group. An example of a suitable brominated monomer is penta bromo methyl acrylate. Preferable polymers have at least 20% w/w bromine. Preferable aqueous suspensions have at least 40% solid content. Fire-retardant products according to the invention comprise a polymer made of at least one bromine-containing monomer and at least one non-brominated monomer. Preferable fire-retardant products include polymers according to the invention.Type: ApplicationFiled: January 25, 2005Publication date: July 19, 2007Applicants: BROMINE COMPOUNDS LTD., B. B. POLYMERS A.C.A. LTD.Inventor: Yifat Bareket
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Patent number: 7217849Abstract: A method is described for producing n-propyl bromide of a high degree of purity, which contains isopropyl bromide in an amount lower than 0.1% w/w, and usually lower than 0.05%. The method is characterized in that n-propanol is reacted with HBr which is in gas form, preferably dry, and which is in excess over the stoichiometric amount, wherein the excess HBr is at the end of the reaction in an aqueous solution formed from the reaction water. The invention further relates to N-propyl bromide of high purity, containing typically less than 500 ppm of isopropyl bromide.Type: GrantFiled: November 11, 2002Date of Patent: May 15, 2007Assignee: Bromine Compounds Ltd.Inventors: Aharon Meirom, Arieh Kampf, Dmitri Grinberg, Sarina Grinberg, legal representative, Mark Grinberg, deceased
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Patent number: 7091270Abstract: The present invention provides novel pentabromobenzyl alkyl ethers serving as highly effective flame retardants in polymers. The invention further provides a fire retarded polymer composition comprising said pentabromobenzyl alkyl ethers.Type: GrantFiled: January 23, 2000Date of Patent: August 15, 2006Assignee: Bromine Compounds Ltd.Inventors: Joseph Zilberman, Alon Tavor, Dorit Canfi, David Ioffe, Grigory Titelman, Samuel Bron, Olga Weinberg
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Publication number: 20050148788Abstract: Suspensions of PBBMA, characterized in that they comprise PBBMA in the form of finely ground particles and contain suspending agents chosen from among xanthene gums, anionic or nonionic purified, sodium modified montmorilonite, naphthalene sulfonic acid-formaldehyde condensate sodium salt, sodium or calcium or ammonium salts of sulfonated lignin, acrylic acids/acrylic acids ester copolymer neutralized—sodium polycarboxyl, and wetting agents chosen from among alkyl ether, alkylaryl ether, fatty acid diester and sorbitan monoester types, polyoxyethylene (POE) compounds.Type: ApplicationFiled: March 8, 2005Publication date: July 7, 2005Applicant: Bromine Compounds Ltd.Inventors: Gad Friedman, Emanuel Buchbinder, Nurit Kornberg
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Publication number: 20050124746Abstract: The present invention provides novel pentabromobenzyl alkyl ethers serving as highly effective flame retardants in polymers. The invention further provides a fire retarded polymer composition comprising said pentabromobenzyl alkyl ethers.Type: ApplicationFiled: January 23, 2003Publication date: June 9, 2005Applicant: Bromine Compounds Ltd.Inventors: Joseph Zilberman, Alon Tavor, Dorit Canfi, David Ioffe, Grigory Titelman, Samuel Bron, Olga Weinberg
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Publication number: 20050069451Abstract: A method for inhibiting or retarding the corrosion of metals in contact with water solutions containing lithium halide comprises introducing into the solution a crystal habit modifier and lithium molybdate.Type: ApplicationFiled: November 12, 2004Publication date: March 31, 2005Applicant: Bromine Compounds Ltd.Inventor: David Itzhak
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Patent number: 6872332Abstract: Suspensions of PBBMA, characterized in that they comprise PBBMA in the form of finely ground particles and contain suspending agents chosen from among xanthane gums, anionic or nonionic purified, sodium modified montmorilonite, naphthalene sulfonic acid-formaldehyde condensate sodium salt, sodium or calcium or ammonium salts of sulfonated lignin, acrylic acids/acrylic acids ester copolymer neutralized—sodium polycarboxyl, and wetting agents chosen from among alkyl ether, alkylaryl ether, fatty acid diester and sorbitan monoester types, polyoxyethylene (POE) compounds.Type: GrantFiled: June 11, 2001Date of Patent: March 29, 2005Assignee: Bromine Compounds Ltd.Inventors: Gad Friedman, Emanuel Buchbinder, Nurit Kornberg
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Publication number: 20050065386Abstract: A method is described for producing n-propyl bromide of a high degree of purity, which contains isopropyl bromide in an amount lower than 0.1% w/w, and usually lower than 0.05%. The method is characterized in that n-propanol is reacted with HBr which is in gas form, preferably dry, and which is in excess over the stoichiometric amount, wherein the excess HBr is at the end of the reaction in an aqueous solution formed from the reaction water. The invention further relates to N-propyl bromide of high purity, containing typically less than 500 ppm of isopropyl bromide.Type: ApplicationFiled: November 11, 2002Publication date: March 24, 2005Applicant: Bromine Compounds Ltd.Inventors: Aharon Meirom, Arieh Kampf, Dmitri Grinberg, Mark Grinberg, Sarina Grinberg
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Publication number: 20050012082Abstract: Suspensions of PBBMA, characterized in that they comprise PBBMA in the form of finely ground particles and contain suspending agents chosen from among xanthene gums, anionic or nonionic purified, sodium modified montmorilonite, naphthalene sulfonic acid-formaldehyde condensate sodium salt, sodium or calcium or ammonium salts of sulfonated lignin, acrylic acids/acrylic acids ester copolymer neutralized-sodium polycarboxyl, and wetting agents chosen from among alkyl ether, alkylaryl ether, fatty acid diester and sorbitan monoester types, polyoxyethylene (POE) compounds.Type: ApplicationFiled: August 11, 2004Publication date: January 20, 2005Applicant: Bromine Compounds Ltd.Inventors: Gad Friedman, Emanuel Buchbinder, Nurit Kornberg
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Publication number: 20050009933Abstract: Suspensions of PBBMA, characterized in that they comprise PBBMA in the form of finely ground particles and contain suspending agents chosen from among xanthene gums, anionic or nonionic purified, sodium modified montmorilonite, naphthalene sulfonic acid-formaldehyde condensate sodium salt, sodium or calcium or ammonium salts of sulfonated lignin, acrylic acids/acrylic acids ester copolymer neutralized-sodium polycarboxyl, and wetting agents chosen from among alkyl ether, alkylaryl ether, fatty acid diester and sorbitan monoester types, polyoxyethylene (POE) compounds.Type: ApplicationFiled: August 11, 2004Publication date: January 13, 2005Applicant: Bromine Compounds Ltd.Inventors: Gad Friedman, Emanuel Buchbinder, Nurit Kornberg
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Publication number: 20040176474Abstract: The stabilization of 3BP throughout its life-cycle is achieved via the use of azeotropic mixtures for dilution and prevention of shock or temperature sensitivity.Type: ApplicationFiled: March 9, 2004Publication date: September 9, 2004Applicant: Bromine Compounds Ltd.Inventor: Ron Frim
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Publication number: 20040161439Abstract: The stabilization of 3BP throughout its life-cycle is achieved via the use of azeotropic mixtures for dilution and prevention of shock or temperature sensitivity.Type: ApplicationFiled: February 13, 2003Publication date: August 19, 2004Applicant: Bromine Compounds Ltd.Inventor: Ron Frim
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Patent number: 6737456Abstract: The present invention relates to A flame-retardant polyolefin composition or to a fiber that are comprised of (i) at least one polyolefin; (ii) a tris(tribromoneopentyl) phosphate; and (iii) afree radical source. The composition may further comprise an additional flame-retarding compound, which may be selected from an inorganic or an organic compound. It may further comprise ultra violet protectants. The invention is also related to a textile object comprised of a plurality of said fibers and to injection or extruded molded articles produced from said flame-retardant compositon.Type: GrantFiled: February 27, 2001Date of Patent: May 18, 2004Assignee: Bromine Compounds Ltd.Inventors: Yoav Bar-Yakov, Smadar Hini
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Patent number: 6632870Abstract: Flame-retarded transparent plastic compositions comprising polyhalgenated trimethylphenyl indan. The polyhalogenated trimethylphenyl indan is a mixture of polyhalogenated trimethylphenyl indanes having each 3 to 9 halogen atoms. The halogen may be bromine or a mixture of bromine and chlorine. The transparent plastic is selected from polycarbonate, polymethylmethacrylate, and polystyrene. The polyhalogenated trimethylphenyl indan is present in an amount of up to about 40% by weight. The transparent plastic flame-retarded material is prepared by mixing the plastic matrix with a flame-retardant effective amount of a polyhalogenated trimethylphenyl indan.Type: GrantFiled: November 29, 2000Date of Patent: October 14, 2003Assignee: Bromine Compounds Ltd.Inventors: Ita Finberg, Lev Utevski
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Publication number: 20030171463Abstract: A process for preparing 4,4′-biphenol phenylphosphate ester products is described. These ester products, having low acid value and low contents of phenol and residual catalyst, being flowable powders, and further having excellent physical properties such as heat and hydrolytic stability, are useful as halogen-free, effective flame retardants, particularly in thermoplastic polymer compositions.Type: ApplicationFiled: January 6, 2003Publication date: September 11, 2003Applicant: Bromine Compounds Ltd.Inventors: Olga Weinberg, Joseph Zilberman
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Publication number: 20030007888Abstract: A method for inhibiting or retarding the corrosion of metals in contact with water solutions containing lithium halide comprises introducing into the solution a crystal habit modifier and lithium molybdate.Type: ApplicationFiled: April 1, 2002Publication date: January 9, 2003Applicant: Bromine Compounds Ltd.Inventor: David Itzhak
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Patent number: 6399835Abstract: Processes for the electrophilic substitution of aromatic compounds, such as alkylation, with a desired substituent are disclosed. The processes include contacting the aromatic compound, a precursor of the desired substituent and an aqueous reagent containing zinc halide at elevated temperatures such as above 50° C.Type: GrantFiled: April 6, 2000Date of Patent: June 4, 2002Assignee: Bromine Compounds Ltd.Inventors: Ariel Ewenson, David Itzhak, Miriam Freiberg Bergstein, Asher Shushan, Bertha Croitoru, David Beneish, Naim Faza
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Patent number: 6380440Abstract: Process for the preparation of 3-bromoanisole comprising methoxydenitrating 3-bromonitrobenzene in the presence of a phase-transfer catalyst (PTC), and the preparation of 3-bromonirtobenzene by the bromination of nitrobenzene with bromine in oleum. The methoxydenitration reagent in an alkali metal methoxide, which is selected from sodium methoxide and potassium methoxide. The amount of methoxide used is 1-1.5 mol per mol of 3-bromonitrobenzene. The alkali methoxide can be a pre-prepared solid or it can be prepared in situ, by the reaction of the corresponding alkali hydroxide and methanol. In the case when pre-prepared solid methoxide is used, the effective amount of alkali hydroxide is between 1.2-1.7 mol per mol of 3-bromonitrobenzebe. The reaction temperatures are between about 40 to 80° C., with preference to reaction temperatures of 50 to 55° C. In the case in which methoxide is prepared in situ, the effective amount of alkali hydroxide is between 2.2-2.4 mol per mol of 3-bromonitrobenzene.Type: GrantFiled: October 5, 2000Date of Patent: April 30, 2002Assignee: Bromine Compounds Ltd.Inventors: Mark Gelmont, Joseph Zilberman
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Patent number: 6288097Abstract: A composition comprising A) an aqueous solution wherein the total content of 3-isothiazolinones is below 8 wt/%, and B) a stabilizing compound of the formula: [RxA—C6H2R1R2]y—Z wherein: R, R1 and R2 each independently represents hydrogen, a straight-chained or branched or cyclic alkyl radical, aralkyl or aryl; A is oxygen or nitrogen; Z represents ARx, R1, R2, alkoxy methylene, methylene or alkylidene; provided that when A is oxygen, x is 0 or 1 and when A is nitrogen, x is 1 or 2; and y is 1 or 2; exhibits improved stability.Type: GrantFiled: June 8, 1993Date of Patent: September 11, 2001Assignee: Bromine Compounds, Ltd.Inventors: Jeane Segall, Leonard Marshall Shorr
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Patent number: 6241864Abstract: A potentiostatic analyzer for active halogens in conducting solutions that contain also the corresponding halide comprises, in combination: a) a concentration-to-current transducer, which is an electrolytic cell; b) means for providing a controlled flow of the solution being analyzed through the cell; and c) a potentiostatic transmitter for controlling the electrodes of the electrolytic cell.Type: GrantFiled: September 28, 1999Date of Patent: June 5, 2001Assignee: Bromine Compounds Ltd.Inventors: Tuvia Tony Bejerano, Chaim N. Yarnitsky, Miriam Freiberg Bergstein