Albemarle Corporation

Hickory Springs Manufacturing Company

Jeffrey Todd Aplin

Arthur G Mack

Charles H Kolich

William J Layman, Jr

Techen Tsao

Elbert F Feske

Hoover Chew

Nelson E Clark

John F Balhoff

Douglas W Luther

John Kirby Kendall

Saadat Hussain

William R Brown

The present invention relates to the use of low triphenyl phosphate, high phosphorous content aryl phosphates with high ortho alkylation as flame retardants in polyurethane or polyisocyanurate foams or polyurethane or polyisocyanurate foam formulations.

Use of low triphenylphosphate, high phosphorous content isopropyl phenyl phosphates as flame retardants in polyurethane or polyisocyanurate foams

The present invention relates to low triphenyl phosphate, high phosphorous content aryl phosphates with high ortho alkylation that are suitable for use as flame retardant compositions, processes for their preparation, and their use as flame retardants.

Low triphenylphosphate, high phosphorous content isopropyl phenyl phosphates with high ortho alkylation

Preparing brominated styrenic polymer by maintaining a mixture formed from (i) brominating agent, (ii) a solvent solution of styrenic polymer, and (iii) aluminum halide catalyst, at &#x2212;20 to +20&#xb0; C., and terminating bromination in 20 minutes or less. New brominated anionic styrenic polymers have better melt flow and/or lower initial &#x394;E values than the best previously-known brominated anionic styrenic polymers. Other features of such new polymers include high thermal stabilities at 320&#xb0; C. and/or very low initial color values. Brominated styrenic polymers, especially brominated anionic styrenic polymers, are useful as flame retardants for thermoplastic polymers.

Brominated styrenic polymers and their preparation

Flame retardant formulations comprised of at least one bromine-containing polyol are produced by a process which comprises:

Flame retardants with high halogen content and low viscosity

Provided are new flame retardants and liquid flame retardant additive compositions of low viscosity for use in flexible polyurethane foams. The new flame retardants are the reaction product of at least one brominated aromatic diester diol with at least one alcohol-reactive agent. Preferred liquid flame retardant additive compositions are capable of minimizing visible scorching of the foam during its production. Flexible flame retardant polyurethane foams and methods for their production are also provided. The flame retardant additive compositions are formed at least from a) at least one reaction product of a brominated aromatic diester diol and an alcohol-reactive agent; b) at least one hindered amine antioxidant; and c) at least one phenolic antioxidant in which the phenolic ring is substituted by an alkanoic acid alkyl ester group in which alkanoic acid moiety has in the range of 2 to about 4 carbon atoms and the alkyl group has in the range of about 6 to about 16 carbon atoms.

Flame retardant, additive compositions, and flame retardant polyurethanes

A flame retardant formulation which is the combination of at least (1) at least one bromine-containing polyol flame retardant formed from the reaction of (a) tetrabromophthalic anhydride, (b) an aliphatic polyol, and (c) an epoxide, and (2) at least one aliphatic diester of an alkane dicarboxylic acid, with the proviso that the formulation has a viscosity at 25&#xb0; C. of about 20,000 cps or less, and a bromine content of at least about 40 wt %. A flame retardant compound formed from A) tetrabromophthalic anhydride; B) diethylene glycol; C) at least one alpha-omega alkane diol, or at least one alpha-omega alkane diol and at least one aliphatic monool; and D) at least one alkylene oxide; with the proviso that the compound has a viscosity at 25&#xb0; C. of about 60,000 cps or less, and a bromine content of at least about 43 wt %. Polymer compositions formed from (a) a polyurethane or a polyisocyanurate and (b) a formulation of the invention.

This invention relates to the production of an hexabromocyclododecane product, which process comprises brominating cyclododecatriene in the presence of a 1,4-dioxane and water based solvent and from about 0.5 to about 30 wt % bromide ion in the liquid phase of the reaction mass. Optional post-reaction heat treatment in a finishing step increases process yields if needed. The hexabromocyclododecane product is unrecrystallized and contains no more than about 1.5 wt % tetrabromocyclododecene impurities.

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Baton Rouge, LA, United States of America

Jeffrey Todd Aplin