Showing papers on "Triphenyl phosphate published in 1992"

Allergic contact dermatitis from triphenyl phosphate.

Abstract: A 29-year-old man, with no previous allergic or atopic history, had a 6-month history of an itchy fissured psoriasiform dermatitis of both palms. He was a carpenter but tolerated woods well. Asked about hobbies, he described making special figures, such as animals, that would participate in festivals at carnival time. For the last few months, he had been constructing a big bird, the feathers of which were applied meticulously one by one. He used natural feathers of different colours, which he attached carefully with a plastic glue. Positive patch test results of a standard series, balsams, plastics and lacquers (Henna!-Trolab®) were as follows at 4 days. paraben-mix 15% pet. + + cobalt chloride 1% pet. + potassium dichromate 0.5% pet. + + formaldehyde 1% aq. + triphenyl phosphate 5% pet. + + Discussion

Triaryl phosphate ester composition and process for its preparation

Abstract: The invention is a novel composition of alkylated phenyl phosphate esters comprising by weight 1% to 20% trialkylphenyl phosphate, 10% to 50% dialkylphenyl monophenyl phosphate, 15% to 60% monoalkylphenyl diphenyl phosphate and less than 2% triphenyl phosphate and a process for preparing the composition comprising passing the composition at least once through a thin film evaporator at a temperature of about 200° C. to about 250° C. at a pressure sufficiently less than 5 kPa to evaporate about 5% to about 30% of the composition.

Flame-retardant modification of UV-curable resins with monomers containing bromine and phosphorus

Abstract: UV-curable urethane acrylate resin and oligoester acrylate resin have been effectively flame retarded with vinyl-type flame-retardant monomers containing both bromine and phosphorus atoms. Thermogravimetric analysis indicates that the decomposition temperature of flame-retardant monomer is more closely matched to the decomposition temperature of cured oligoester acrylate resin than to that of cured urethane acrylate resin. The efficiency of each flame-retardant monomer in oligoester acrylate resin is higher than in urethane acrylate resin by a factor of ∼ 2.2. The individual and the combined effects of tribromophenyl acrylate and triphenyl phosphate on the oxygen index of UV curable urethane acrylate resin have been studied. The bromine phosphorus synergistic action of the two flame-retardant components is evaluated quantitatively, and a maximum intermolecular bromine phosphorus synergism was observed in a flame-retarded formulation containing a Br/P atom ratio of 2. In the three acrylic monomers containing both bromine and phosphorus atoms, the optimum intramolecular bromine phosphorus synergism was observed at a monomer also containing a Br/P atom ratio of 2.

Cellulose ester film, photosensitive silver halide material and treatment method

Abstract: PURPOSE:To produce the title film excellent in strengths, flame retardance, resistance to bleeding, and storage stability by incorporating a specific plasticizer and a specific degradation preventive into a cellulose ester film contg. triphenyl phosphate as a plasticizer. CONSTITUTION:A cellulose ester film contg. triphenyl phosphate as a plasticizer, another plasticizer of formula I (e.g. a compd. of formula II or III), and at least one degradation preventive selected from the group consisting of a peroxide-decomposing agent (e.g. a compd. of formula IV), a free radical chain transfer inhibitor (e.g. a compd. of formula V), a metal deactivator (e.g. a compd. of formula VI), and an acid acceptor (e.g. a compd. of formula VII) is provided. The plasticizer of formula I prevents bleeding, and the degradation preventive improves the storage stability of the film.

Photochemical behavior of organic phosphate esters in aqueous solutions irradiated with a mercury lamp

Abstract: Pollution by toxic chemicals that are resistant to biological degradation and have a potential for accumulation in biological organisms is becoming a world-wide problem. Organic phosphate esters (OPEs) are widely used as plasticizers, industrial hydraulic fluids, and lubricant additives. Various OPEs have been detected in environmental samples and in industrial and domestic wastewaters. Ultraviolet (UV) irradiation is known as an effective treatment for persistent chemicals in natural water or wastewater. Therefore, in order to develop a means of removal of OPEs in water, some fundamental experiments with UV irradiation were performed with a mercury lamp, and photochemical behaviors and photodecomposition products were examined for 7 OPEs, namely tributyl phosphate(TBP), tris(chloropropyl) phosphate (TCPP), tris(2-chloroethyl) phosphate (TCEP), trioctyl phosphate (TOP), tris(dichloropropyl) phosphate (CRP), triphenyl phosphate (TPP), and tricresyl phosphate (TCP). 12 refs., 2 figs., 1 tab.

Cellulose ester film and its production

Abstract: PURPOSE:To obtain a cellulose ester film improved in flame retardancy, dimensional stability, volatilization resistance, migration resistance and mechanical strengths by casting a dope comprising a cellulose ester, a specified plasticizer and a solvent on a support to form a film. CONSTITUTION:A plasticizer comprising a compound of the formula (wherein R1, R2, R4 and R5 are each a hydrocarbyl such as alkyl or aryl; R3 is alkylene; and (n) is 1-10) is optionally mixed with another plasticizer such as triphenyl phosphate or biphenyl diphenyl phosphate to obtain a plasticizer component (B). 18-35wt.% mixture of a cellulose ester (A) with 5-20wt.%, based on component A, component B is dissolved in a solvent containing 75-87wt.% methylene chloride to obtain a dope. This dope is cast on a support at a surface temperature of 10 deg.C or below to form the title film of a thickness of 10-500mum.