Abstract: A process for the formation of a di(hydroxyalkylaryl) aryl phosphate is disclosed which comprises the reaction of an o-alkyl substituted aromatic diol, e.g., an o-alkyl substituted hydroquinone such as o-t-butylhydro-quinone, and monoaryl dihalophosphate, such as monophenyl dichlorophosphate. This process can, in particular, be used to make certain di(hydroxy-o-alkylphenyl) phenyl phosphate compounds, preferably those that are p-hydroxy, such as di(p-hydroxy-o-t-butylphenyl) phenyl phosphate.

Abstract: A process for the formation of a di(hydroxyalkylaryl) aryl phosphate is disclosed which comprises the reaction of an o-alkyl substituted aromatic diol, e.g., an o-alkyl substituted hydroquinone such as o-t-butylhydro-quinone, and monoaryl dihalophosphate, such as monophenyl dichlorophosphate. This process can, in particular, be used to make certain di(hydroxy-o-alkylphenyl) phenyl phosphate compounds, preferably those that are p-hydroxy, such as di(p-hydroxy-o-t-butylphenyl) phenyl phosphate.

Abstract: A process for the formation of a di(hydroxyalkylaryl) aryl phosphate is disclosed which comprises the reaction of an o-alkyl substituted aromatic diol, e.g., an o-alkyl substituted hydroquinone such as o-t-butylhydro-quinone, and monoaryl dihalophosphate, such as monophenyl dichlorophosphate. This process can, in particular, be used to make certain di(hydroxy-o-alkylphenyl) phenyl phosphate compounds, preferably those that are p-hydroxy, such as di(p-hydroxy-o-t-butylphenyl) phenyl phosphate.

Abstract: A process for the synthesis of a hydrocarbyl bis(dihydrocarbyl phosphate), such as a hydrocarbyl bis(diaryl phosphate), comprises the reaction of an unstable hydrocarbyl-containing diol, such as an aromatic group-containing diol, with a dihydrocarbyl halophosphate, such as diphenyl chlorophosphate, in the presence of a Lewis acid catalyst, such as magnesium dichloride, in the additional presence of an effective amount (e.g., up to about 100% by weight of diol and halophosphate) of a liquid hydrocarbon, such as an aliphatic hydrocarbon, like heptane, or an aromatic hydrocarbon, such as toluene, to enhance the removal of hydrogen halide by-product and thereby increase the yield of hydrocarbyl bis(dihydrocarbyl phosphate).

Abstract: The thermostability of an aromatic polyphosphate composition an be improved by the addition of an effective amount of a hydroxy-terminated aromatic polyphosphate composition for such.

Abstract: The present invention is a process for forming monohydroxy-terminated aromatic oligomeric phosphates by the reaction of a diaryl halophosphate, such as diphenyl chlorophosphate, optionally in the presence of some monoaryl dihalophosphate, with an aromatic diol, such as resorcinol, to form the monohydroxy-terminated aromatic oligomeric phosphate. The reaction preferably employs a Lewis acid catalyst, such as magnesium dichloride.

Abstract: A process for forming a composition containing over, for example, about 90% by weight of an alkylene-arylene bridging group-containing bis(diphenyl phosphate) compound and less than, for example, 10%, by weight, of monophosphate by-product. This process involves the reaction of a composition containing a diphenyl halophosphate and an alkylene-arylene bridging group-containing diol, in the presence of a catalytic amount of a Lewis acid catalyst, utilizing a means, during the course of the reaction, for removal of hydrohalide by-product. The preferred means that are used for removal of hydrohalide by-product include:performing the reaction in a hydrocarbon solvent;utilizing vacuum to remove such by-product;utilizing sparging with an inert gas; andcompatible combinations of one or more of the foregoing means.

Abstract: The present invention is a process for forming monohydroxy-terminated aromatic oligomeric phosphates by the reaction of a diaryl halophosphate, such as diphenyl chlorophosphate, optionally in the presence of some monoaryl dihalophosphate, with an aromatic diol, such as resorcinol, to form the monohydroxy-terminated aromatic oligomeric phosphate. The reaction preferably employs a Lewis acid catalyst, such as magnesium dichloride.

Abstract: The present application relates to a flame retarded polycarbonate resin composition containing for flame retardancy a hydroxy-terminated aromatic oligomeric phosphate composition of the formula: ##STR1## where R is a hydrocarbyl group derived from an aliphatic or aromatic diol, Ar is an alkyl-substituted or unsubstituted phenyl group, n is from about 0 to about 10, and the phosphate composition contains a predominant amount of phosphate where n ranges from 0 to 1.

Abstract: Novel flame retardant compounds for polymers are disclosed that include 1,4-cyclohexanedimethanol bis(diphenyl phosphate)s. These can be synthesized by reacting 1,4-cyclohexanedimethanol and a diphenyl halophosphate, such as diphenyl chlorophosphate, in the presence of a catalyst, such as magnesium chloride, in an appropriate solvent, such as hexane.

Abstract: The present invention is a process for forming hydroxy-terminated aromatic oligomeric phosphates by the initial reaction of a monoaryl dihalophosphate, such as monophenyl dichlorophosphate, with an aromatic diol, such as resorcinol, to form a halo-terminated aromatic oligomeric phosphate and the subsequent reaction of that halo-terminated phosphate with aromatic diol to form the hydroxy-terminated aromatic oligomeric phosphate. The initial and subsequent reactions preferably employ a Lewis acid catalyst, such as magnesium dichloride.

Abstract: Arylene poly(diarylphosphate) compositions can be formed by a process which comprises:(a) forming a reaction mixture comprising diaryl halophosphate and, as by-products, a mixture of monoaryl dihalophosphate and triarylphosphate, by reaction of phosphorus oxyhalide and a phenol in a first reactor;(b) if a preponderance of lower oligomers is desired, optionally transferring the reaction mixture from (a) to a subsequent reactor where at least a portion of the monoaryl dihalophosphate is recycled to the first reactor for reaction with the phenol contained therein to form additional diaryl halophosphate in the first reactor and the reaction mixture in (b) becomes enriched with diaryl halophosphate to ultimately favor the ultimate formation of a product of lower molecular weight distribution; and(c) reacting the product from (a) or (b), as selected, with an aromatic diol to form the arylene poly(diarylphosphate) product.

Abstract: Hydrocarbyl bisphosphate compounds containing hindered aryl substituents in the phosphate groups can be formed by: (a) reacting a hindered phenol, e.g., xylenol, with a phosphorus oxytrihalide, e.g., phosphorus oxytrichloride, to form a reaction product mixture; and (b) combining the reaction product, without distillation of the product from the reaction product mixture, from (a) mixture with a hydrocarbyl diol, e.g., one containing a phenyl ring such as hydroquinone or resorcinol.

Abstract: Phenolphthalein bis(dihydrocarbyl phosphates), optionally substituted with chloro or bromo atoms, can be used as fire retardant additives for polymers.

Abstract: Glycol bisphosphate compounds are formed by first hydrolytically condensing a dihydrocarbylhalophosphate to form a tetrahydrocarbyl pyrophosphate and then reacting the pyrophosphate with a cyclic ether to form the glycol bisphosphate.

Abstract: Glycol bisphosphate compounds are formed by first hydrolytically condensing a dihydrocarbylhalophosphate to form a tetrahyrocarbyl pyrophosphate and then reacting the pyrophosphate with a cyclic ether to form the glycol bisphosphate.

Abstract: The present invention relates to a process for the preparation of alkyl semicarbazides by reaction of a dithiocarbamate and hydrazine in a weakly basic reaction media using a metal rearrangement catalyst.

Abstract: S-substituted phosphorodichloridothiolates such as S-alkyl, cycloalkyl, aralkyl, and arylphosphorodichloridothiolates are prepared by reacting a sulfuryl chloride and a mercaptan or disulfide with phosphorus trichloride and a carboxylic acid anhydride.

Abstract: Isothiocyanates are formed by oxidizing, with gaseous oxygen or air, in the presence of a metal oxidation catalyst a dithiocarbamate with appropriate control of the pH of the reaction medium to suppress the formation of by-products. Optionally a quaternary ammonium halide catalyst can be used to increase product yield.