Bromine Compounds Limited

Icl-ip America Inc.

Bk Giulini Gmbh

Mark Gelmont

Ron Frim

Andrew M Piotrowski

Joseph Zilberman

Jeffrey Stowell

Eran Gluz

Zhihao Chen

Mayank Singh

David Yoffe

Michael Yuzefovich

Michael R Peled

Yoav Bar-Yaakov

Yaniv Hirschsohn

Dina Alon

Jakob Oren

Thomas Staffel

Michael Schmitt

Michael Yuzefovitch

Dorit Peled

Orly Cohen

Renata Yelizarov

Joseph Bercovici

Lior Melamed

Andrew Piotrowski

Lucas Zimmermann

The present invention provides fire-retarded rigid polyurethane foam comprising the reaction product of polyol and isocyanate foam forming components and a dialkyl phosphorus-containing compound, namely a reactive mono-hydroxyl-functional dialkyl phosphinates, as flame retardant, serving as highly efficient reactive flame retardant in said rigid polyurethane foam.

Rigid polyurethane foam containing reactive flame retardant

The present invention provides dialkyl phosphorus-containing compounds, namely reactive mono-hydroxyl-functional dialkyl phosphinates, serving as highly efficient reactive flame retardants in flexible polyurethane foams. The invention further provides fire-retarded polyurethane compositions comprising said the reaction product of the mono-hydroxyl-functional dialkyl phosphinates with polyol and isocyanate foam forming components.

Reactive flame retardants for flexible polyurethane foams

The present invention provides novel cyclic phosphorus-containing compounds, namely hydroxyl-functional phospholene-1-oxides, serving as highly efficient reactive flame retardants in urethane systems, particularly in flexible polyurethane foams, semi-rigid and rigid polyurethane and polyisocyanurate foams. The invention further provides fire-retarded polyurethane compositions comprising said hydroxyl-functional phospholene-1-oxides.

Reactive flame retardants for polyurethane and polyisocyanurate foams

The present invention provides novel cyclic phosphorus-containing compounds, namely hydroxyl-functional phospholene-1-oxides, serving as highly efficient reactive flame retardants in urethane systems, particularly in flexible polyurethane foams, rigid polyurethane foams and rigid polyisocyanurate foams. The invention further provides fire-retarded polyurethane compositions comprising said hydroxyl-functional phospholene-1-oxides.

The invention relates to a process for preparing bromine-containing polymer, comprising a Friedel-Crafts alkylation reaction of tetrabromoxylylene dihalide, or tetrabromoxylylene dihalide in combination with pentabromobenzyl halide, with a reactant having one or more six-membered aromatic rings, wherein the reaction takes place in a solvent in the presence of a Friedel-Crafts catalyst, and isolating from the reaction mixture the bromine-containing polymer. The so-formed polymers and their use as flame retardants form additional aspects of the invention.

Bromine-containing polymers useful as flame retardants

Preparation of bromine-containing polymers useful as flame retardants

The invention provides a process for preparing bromine-containing polymers, comprising a Friedel-Crafts alkylation reaction of pentabromobenzyl halide with a polymer reactant which contains one or more six-membered aromatic ring(s) in its repeat unit, in the presence of at least one Friedel-Crafts catalyst. The so-formed bromine-containing polymers, having pendent &#x2014;CHCBrgroups attached to at least a portion of the six-membered aromatic rings of the polymer, with a carbon ring atom of said six-membered aromatic ring being bonded to the aliphatic carbon of said &#x2014;CHCBrpendent group, are also provided. These bromine-containing polymers are useful as flame retarding agents.

Preparation of bromine-containing polymers and their application as flame retardants

The invention relates to compounds of the formula Ar(&#x2014;CHCBr), wherein Ar indicates a structure comprising one or more six-membered aromatic ring(s) and &#x2014;CHCBrindicates a pentabromobenzyl group, characterized in that at least one carbon atom of said six-membered aromatic ring(s) is bonded to the benzylic carbon of said &#x2014;CHCBrgroup, wherein y, which indicates the number of the &#x2014;CHCBrgroups in said compound, is not less than 1. Processes for preparing the compounds and their use as flame retardants are also disclosed.

Preparation of bromine-containing aromatic compounds and their application as flame retardants

A liquid flame retardant composition which comprises one or more flame retarding agents, which are the epoxides obtainable by reacting tetrabromobisphenol A with epichlorohydrin and their end-capped derivatives represented by Formula (1) is provided. The liquid composition is especially useful in the preparation of rigid polyurethane foams.

Flame retardant composition

The invention relates to compounds of the formula Ar(&#x2014;CH2C6Br5)y, wherein Ar indicates a structure comprising one or more six-membered aromatic ring(s) and &#x2014;CHCBrindicates a pentabromobenzyl group, characterized in that at least one carbon atom of said six-membered aromatic ring(s) is bonded to the benzylic carbon of said &#x2014;CHCBrgroup, wherein y, which indicates the number of the &#x2014;CHCBrgroups in said compound, is not less than 1. Processes for preparing the compounds and their use as flame retardants are also disclosed.

The invention provides pentabromobenzyl moiety containing hydroxy-functional compounds which are useful as flame-retardants in flexible and rigid polyurethane foams and also in rigid polyisocyanurate foams. Processes for preparing the compounds, polyurethane and polyisocyanurate foams containing the compounds are also provided by the invention.

Flame retardants, processes for their preparation and uses thereof in polyurethane and polyisocyanurate foams

A liquid flame retardant composition having one or more flame retarding agents, which are the epoxides obtainable by reacting tetrabromobisphenol A with epichlorohydrin and their end-capped derivatives represented by Formula (1), is provided. The liquid composition is especially useful in the preparation of rigid polyurethane foams.

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&deg; C., with preference to reaction temperatures of 50 to 55&deg; 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. The reaction temperatures are between about 50 to 80&deg; C. with preference to reaction temperatures of 55 to 65&deg; C.

Processes for the preparation of 3-bromoanisole and 3-bromonitrobenzene

A process for the preparation of 5-hydroxyisophthalic acid (5-HIPA) that comprises hydrolyzing a starting material chosen from among 5-bromoisophthalic acid (5-BIPA), mixtures of 5-BIPA and dibromoisophthalic acid isomers, and salts of thereof in an aqueous alkaline solution, in the presence of a catalytically effective amount of a copper compound catalyst and in a temperature range of between 100.degree. and 270.degree. C.

Growing community of inventors

Haifa, Israel

Mark Gelmont