Showing papers on "Triphenyl phosphate published in 1985"

Fungal metabolism of tert-butylphenyl diphenyl phosphate.

Abstract: The fungal metabolism of tert-butylphenyl diphenyl phosphate (BPDP) was studied. Cunninghamella elegans was incubated with BPDP for 7 days, and the metabolites formed were separated by thin-layer, gas-liquid, or high-pressure liquid chromatography and identified by 1H nuclear magnetic resonance and mass spectral techniques. C. elegans metabolized BPDP predominantly at the tert-butyl moiety to form the carboxylic acid 4-(2-carboxy-2-propyl)triphenyl phosphate. In addition, 4-hydroxy-4'-(2-carboxy-2-propyl)triphenyl phosphate, triphenyl phosphate, diphenyl phosphate, 4-(2-carboxy-2-propyl)diphenyl phosphate, 2-(4-hydroxyphenyl)-2-methyl propionic acid, and phenol were detected. Similar metabolites were found in the 28 fungal cultures which were examined for their ability to metabolize BPDP. Experiments with [14C]BPDP indicated that C. elegans metabolized 70% of the BPDP after 7 days and that the ratio of organic-soluble metabolites to water-soluble metabolites was 8:2. The results indicate that fungi preferentially oxidize BPDP at the alkyl side chain and at the aromatic rings to form hydroxylated derivatives. The trace levels of mono- and diaryl metabolites and the low level of phosphotriesterase activity measured in C. elegans indicate that phosphatase cleavage is a minor pathway for fungal metabolism of BPDP.

Production of reclaimed solution of polyurethane foam

Abstract: PURPOSE:To produce a reclaimed solution of a polyurethane foam, by adding an amine based catalyst, tin based catalyst, etc. to a phosphoric acid ester based plasticizer, adding shredded waste of the polyurethane foam, etc. to the resultant decomposition solution, heating the mixture under stirring, and dissolving the waste, etc. CONSTITUTION:One or more of an amine based catalyst, e.g. triethylenediamine, tin based catalyst, e.g. dibutyltin dilaurate, aliphatic organic acid, e.g. stearic acid, surfactant, e.g. quaternary ammonium salt or phosphate in the total amount of 0.5pts.wt. or more are added to a mixture solution of 100pts.wt. phosphoric acid ester based plasticizer, e.g. triphenyl phosphate, with up to 2,000pts.wt. polyether polyol, preferably bi- - tetrafunctional polyether polyol having about 1,000-5,000 molecular weight and if necessary a polyhydroxy compound added thereto to prepare a decomposition solution. Up to 800pts.wt., preferably 100- 300pts.wt. shredded waste of polyurethane foam, etc. is added thereto, heated under stirring and dissolved to give the aimed reclaimed solution.

Flame-retardant clear polyolefin resin composition

Abstract: PURPOSE:To provide a polyolefin resin compsn. excellent in physical properties, flame retardant properties, and clarity, well suited for heat-shrinkable tubings, etc., by incorporating a phosphorus-based flame retardant without destroying clarity and triphenylantimony in a polyethylene resin. CONSTITUTION:A polyethylene resin or a copolymer resin consisting mainly of ethylene (e.g., ethylene/propylene copolymer) is incorporated with a phosphorus- based flame retardant without destroying clarity of the resin (e.g., triphenyl phosphate, ammonium polyphosphate) and triphenylantimony as a flame retardant auxiliary to yield the intended flame-retardant clear polyolefin resin compsn. The proper amt. of the phosphorus-based flame retardant and triphenylantimony to be added is about 20-100pts.wt. and about 0.5pts.wt., respectively, based on 100pts.wt. said resin. Further, a heat stabilizer, antioxidant, filler, etc. without destroying clarity of the resin may be incorporated.