Unitex Chemical Corporation

Other

Miles Inc.

Bayer Corporation

James J Good

James F Day

Brian L Thompson

Charles W Sandefur

Mark A Putnam

Margaret D Ellis

Joseph C Catlin

John G Skabardonis

Samuel S Murphree

Tanya T Harper

Donald V Wood

Neal E Tonks

A highly flame retardant plasticized polyvinyl chloride compound (PVC) comprises a mixture of dialkyl tetrachlorophthalate and dialkyl tetrabromophthalate and is characterized by an absence of brittleness, and substantial flexibility at low temperatures as required for PVC formed jackets and insulation for wire and cable products.

Plasticized polyvinyl chloride compound

A process for the preparation of dialkyl tetrahalophthalates. A tetrahalophthalic anhydride or acid is dissolved in excess C -C alkanols. Residual sulfuric acid is removed by treatment with magnesium acetate or multiple water washes. The mass is esterified with a tetraalkyl titanate, and residual acidic components are removed by treatment with magnesium silicate. These treatments improve processability, production cycle time, product color, clarity and purity.

A process for the preparation of dialkyl tetrahalophthalates. A tetrahalophthalic anhydride or acid is dissolved in excess C.sub.1 -C.sub.18 alkanols. Residual sulfuric acid is removed by treatment with magnesium acetate or multiple water washes. The mass is esterified with a tetraalkyl titanate, and residual acidic components are removed by treatment with magnesium silicate. These treatments improve processability, production cycle time, product color, clarity and purity.

Process for preparing dialkyl tetrahalophthalates

This invention relates to a process for the preparation of storage-stable dye dispersions of alkali metal salts of anionic azo direct dyes by (a) preparing an aqueous slurry of an alkali metal salt of an azo direct dye, said salt having a solubility in water at 25.degree. C. of about 0.1 to about 15% by weight, by azo coupling one or more aromatic diazonium salts with one or more couplers while maintaining a pH of at least about 5 by adding a basic alkali metal compound in the absence of a nitrogen-containing base; (b) optionally, stirring the aqueous slurry at a temperature of about 5.degree. C. to about 100.degree. C. for up to about six hours; (c) optionally, adjusting the temperature of the aqueous slurry to about 5.degree. C. to about 40.degree. C.; and (d) adding to the aqueous slum/a viscosity enhancing agent in an amount sufficient to obtain a viscosity, determined at a temperature of about 20.degree. to about 25.degree. C., of about 500 to about 5000 centipoise (preferably 800 to 1500 centipoise) and 0 to about 10% by weight, based on the total weight of the dye dispersion, of a humectant.

Process for the preparation storage-stable dye dispersions

This invention relates to a process for removing copper ions from highly acidic waste water generated during the manufacture of dyes or pigments or intermediates thereof. The waste water is exposed at a pH less than about 1 to a bed of suspended iron particles, preferably a fluidized bed of iron particles, having a particle size of from about 200 to about 950 micrometers.

Process for removal of copper ions from aqueous effluent

This invention relates to a process for preparing trimethine dyestuffs of the formula ##STR1## wherein R.sup.1 is lower alkyl; R.sup.2 is hydrogen, alkyl, cycloalkyl, aryl, aralkyl, alkoxy, cycloalkoxy, aryloxy, aralkoxy, fluorinated alkyl, alkanoyl, aroyl, alkoxycarbonyl, aryloxycarbonyl, aralkoxycarbonyl, alkanoylamino, aroylamino, alkylaminocarbonyl, arylaminocarbonyl, alkoxycarbonylamino, alkylsulfonyl, arylsulfonyl, halogen, cyano, nitro, carbamoyl, or sulfonamido, or two R.sup.2 together form a fused benzene ring; n is an integer of from 1 to 4; and A.sup.- is an anion, by reacting a mixture of

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Charleston, SC, United States of America

James J Good