Abstract:
An improved method for detoxifying waste materials contaminated with halogenated aromatic hydrocarbons is disclosed. The method provides for detoxification of halogenated aromatic compounds by electrophilic aromatic substitution. The method also provides for the dehalogenation of the lower congeners of such halogenated aromatic compounds, as a result of chemical activation via electrophilic aromatic substitution, followed by nucleophilic aromatic dehalogenation. In addition, the method provides for the more complete dehalogenation of mixtures of halogenated aromatic compounds that contain both higher and lower congeners by increasing the efficiency of dehalogenation of the lower congeners.
Abstract:
Amino-s-triazine salts of bis-(pentaerythritol phosphate) phosphoric acid. The salts are effective flame-retardant additives in a number of different types of polymers.
Abstract:
Compositions comprising ABS and bis(beta-pentabromophenoxyethyl) succinate have good flame retardance and are self-extinguishing in the UL-94 vertical burn test. The compositions may be further compounded with a conventional synergist such as antimony oxide.
Abstract:
Metal complexes and especially nickel EDTA is decomposed by adding an oxidizing agent to an aqueous solution containing metal complexes to define an oxidizable aqueous solution. The oxidizable aqueous solution is then exposed to a source of ultraviolet radiation in the range of from 185-300 nanometers for a period of time sufficient to destroy the complex portion of the metal complex. The remaining metal is recovered.
Abstract:
An improved method for detoxifying waste materials contaminated with halogenated hydrocarbons is disclosed. The method achieves dehalogenation of such halogenated hydrocarbons in a manner as efficient as previous methods, but at a considerably lower cost. The economic advantages of the present invention arise from the use of lower temperatures and/or smaller quantities of reagents, which in turn is made possible by the discovery of a surprisingly superior reagent, 2-methoxyethanol, and superior catalysts, the crown ethers, which allow reagents other than 2-methoxyethanol to function very efficiently in dehalogenation reactions.
Abstract:
A spirodiphosphoamidate-type composition is provided, wherein the composition is represented by the general formula: ##STR1## wherein A and A' are independently selected from the group consisting of oxygen and sulfur; R.sup.1 and R.sup.3 are independently selected from the group consisting of hydrogen, aliphatic, oxyaliphatic, polyoxyaliphatic, cycloaliphatic and aromatic moieties; and R.sup.2 and R.sup.4 are independently selected from the group consisting of C.sub.13 and larger aliphatic, oxyaliphatic, polyoxyaliphatic and aliphatic substituted aryl groups.
Abstract translation:提供螺二磷酸酯型组合物,其中组合物由以下通式表示:其中A和A'独立地选自氧和硫; R 1和R 3独立地选自氢,脂族,脂族,脂族,脂环族和芳族部分; 并且R 2和R 4独立地选自C 13和更大的脂族,脂族,聚氧脂脂族和脂族取代的芳基。
Abstract:
Thermoplastic polyurethane elastomer compositions comprising a polyurethane elastomer, a pentate salt of an amino-s-triazine, and optionally a polyol are flame retardant and intumescent and may be compounded to be self-extinguishing.
Abstract:
Compositions comprising 2,6,7-trioxa-1-phosphobicyclo [2.2.2.] octane -4-methanol-1-oxide and a nitrogen compound selected from the group melamine, ammeline, benzoguanidine, guanidine, urea and salts thereof, are intumescent and are readily adapted to flame retard a variety of dissimilar resins including polyolefins, polyvinylaromatic resins, polycarbonates, polyacrylates, polyamides, PVC and blends thereof.
Abstract:
Thermoplastic polyester compositions comprising a polyester such as polybutylene terephthalate, a pentate salt of an amino-s-triazine, and optionally a polyol are flame retardant and intumescent and may be compounded to be self-extinguishing.
Abstract:
An improved method for detoxifying waste materials contaminated with halogenated hydrocarbons is disclosed. The method achieves dehalogenation of such halogenated hydrocarbons in a manner as efficient as previous methods, but at a considerably lower cost. The economic advantages of the present invention arise from the use of lower temperatures and/or smaller quantities of reagents, which in turn are made possible by the discovery of a surprisingly superior reagent, 2-methoxyethanol.