Albemarle Corporation

Rajeev S Mathur

John Y Lee

Jamie R Strickler

Chi Hung Cheng

Bruce C Berris

Richard A Holub

David W Owens

Jon S Reed

Daniel A De Schryver

Milind M Pradhan

Donald W Imhoff

John Randall Chaya

Jon Shannon Reed

This invention provides aqueous flame retardant dispersions comprising water, a brominated flame retardant containing aromatically-bound bromine, at least one dispersant, at least one wetting agent, and at least one thickener. The brominated flame retardant has an average particle size of about 20 μm or less. The flame retardant dispersion contains about 50 wt % or more of brominated polymeric flame retardant, based on the total weight of the dispersion. Also provided are coating compositions, processes for forming flame retardant dispersions, processes for forming coating compositions, and processes for applying the coating compositions to textile substrates.

Flame retardants for textile applications

This invention provides processes for forming halomagnesium tetrakis(aryl)borates, which processes comprise bringing together, in an anhydrous liquid organic medium, at least one boron trihalide; at least onearyl Grignard reagent; and at least one copper compound. Also provided are processes for forming halomagnesium tetrakis(aryl)borates, which processes comprise bringing together, in an anhydrous liquid organic medium, at least one boron trihalide; at least one copper compound; magnesium metal; and at least one polyhaloaromatic compound.

[object Object]

This invention provides a process for reducing the amount of soluble halide in a solution comprising a liquid organic medium, at least one viscosity reducing agent, at least one dihydrocarbylmagnesium compound, and an initial amount of soluble halide. The process comprises mixing at least one alkali metal with the solution at a mole ratio of alkali metal to magnesium of less than about 1:2.5, thereby forming precipitated soluble halides. Also provided by this invention is a process for reducing the amount of soluble halide in a slurry comprising a liquid organic medium, at least one viscosity reducing agent, at least one dihydrocarbylmagnesium compound, solids from the formation of said dihydrocarbylmagnesium compound, and an initial amount of soluble halide. This process comprises mixing at least one alkali metal with the slurry at a mole ratio of alkali metal to magnesium of less than about 1:1.25, thereby forming precipitated soluble halides.

Halide reduction in dihydrocarbylmagnesium mixtures

The liquid ethereal medium or liquid hydrocarbyl medium of a solution or slurry of an alkali metal tetrakis(aryl)borate is substituted with at least one halogenated hydrocarbon, without isolating the alkali metal tetrakis(aryl)borate, to form a new slurry or solution. At least a portion of the new solution is mixed together with a salt selected from a) a protic ammonium salt, b) an onium salt, and c) a triarylmethyl salt, to produce a protic ammonium tetrakis(aryl)borate, an onium tetrakis(aryl)borate, or a triarylmethyl tetrakis(aryl)borate.

The liquid ethereal medium or liquid hydrocarbyl medium of a solution or slurry of an alkali metal tetrakis( aryl)borate is substituted with at least one halogenated hydrocarbon, without isolating the alkali metal tetrakis( aryl)borate, to form a new slurry or solution. At least a portion of the new solution is mixed together with a salt selected from a) a protic ammonium salt, b) an onium salt, and c) a triarylmethyl salt, to produce a protic ammonium tetrakis( aryl)borate, an onium tetrakis( aryl)borate, or a triarylmethyl tetrakis( aryl)borate.

Process for producing tetrakis(Faryl)borate salts

Lithiated haloarenes, although useful as intermediates in the synthesis of various end products, can be hazardous to prepare since unstable, shock sensitive compounds can be formed during lithiation of haloarenes. To avoid this problem, a reaction of a polyhaloarene with a hydrocarbyl lithium compound is conducted in the presence of another reactant so that the lithiated haloarene, if formed at all, exists as a transitory intermediate in low concentration. In this way, transitory lithiated haloarene which may be, and presumably is, formed in the reaction is converted into a non-hazardous functionally-substituted haloarene essentially as soon as such lithiated haloarene is formed. Thus, an arene having a halogen atom of atomic number greater than 9 substituted on at least two non-adjacent carbon atoms is concurrently reacted with a non-fluoro halotrihydrocarbylsilane and a hydrocarbyl lithium compound, in proportions such that a haloarene having at least one trihydrocarbylsilyl ring substituent is formed.

Growing community of inventors

Baton Rouge, LA, United States of America

Rajeev S Mathur