Triphenyl phosphate

About: Triphenyl phosphate is a research topic. Over the lifetime, 579 publications have been published within this topic receiving 6681 citations. The topic is also known as: phenyl phosphate & TPP.

Cellulose ester film and production of cellulose ester film

Abstract: PROBLEM TO BE SOLVED: To obtain a film having excellent mechanical strengths without using any chlorine-containing solvent by casting a solution containing a cellulose ester and a fluorophenol. SOLUTION: This film is produced by casting a solution containing a cellulose ester desirably having a degree of acetylation of 58.0-62.5% [e.g. cellulose triacetate having a degree of polymerization (viscosity-average) of 220-500] and a fluorophenol or methyl acetoacetate. The fluorophenol or the methyl acetoacetate needs to be used in an amount of 10 wt.%, desirably, 50% or above based on the total solvent amount of the cellulose acetate solution. It is desirable that the cellulose ester solution contains 2-40 wt.%, based on the total solvent of the solution, poor solvent (e.g. ethanol). Further, it is desirable that the solution contains 6-30 wt.%, based on the cellulose ester, plasticizer (e.g. triphenyl phosphate).

Method for manufacturing para-chlorophenol

Abstract: A monochlorophenol containing a preponderating proportion of p-chlorophenol is prepared by converting phenol into triphenyl phosphate, chlorinating the triphenyl phosphate with elementary chlorine and hydrolysing the product to remove the phosphate group. The hydrolysis may be effected with acid or alkaline reagents, some of which are specified, at atmospheric or raised pressure. Examples are given. Triphenyl phosphate for use in the process may be obtained by (1) reacting phenol with phosphorus trichloride, suitably at 70-150 DEG C. in a solvent, e.g. toluene, xylene or halogenated benzene, to yield triphenyl phosphite, which is then oxidized, e.g. with hydrogen peroxide, nitric oxide, sulphuric acid, persulphuric acid, vanadium oxide or barium peroxide, to yield triphenyl phosphate; or (2) reacting phenol with phosphorus oxychloride at 60-200 DEG C. without a solvent but in the presence of a catalyst, e.g. aluminium chloride, magnesium chloride, zinc chloride, phosphorus pentachloride or magnesium oxide. Chlorination products of triphenyl phosphate, for use in the process, are prepared by treating triphenyl phosphate with elementary chlorine either in the absence of a solvent at a temperature above 110 DEG C. or in the presence of a solvent, e.g. acetic acid, carbon tetrachloride or carbon disulphide, at - 10-100 DEG C. In either event, a chlorination catalyst may be present, e.g. ferric chloride, aluminium trichloride, antimony chloride, phosphorus chloride, sulphur chloride, bromine, iodine, sulphur, active carbon or activated clay.

Resin composition and molded article obtained therefrom

Abstract: PROBLEM TO BE SOLVED: To provide a resin composition which satisfies the requirements for sliding characteristics, color tone and appearance at the same time by blending a resin composition consisting of a polycarbonate resin and a polytetrafluoroethylene with a polycaprolactone and/or a phosphoric ester, and a glass filler SOLUTION: A resin composition consisting of 70-98wt% polycarbonate resin and 30-2wt% polytetrafluoroethylene is blended in an amount of 100 ptswt with 05-12 ptswt polycaprolactone and/or phosphoric ester, and 0-45 ptswt glass filler The polycarbonate resin used comprises an aromatic polycarbonate resin obtained by reacting a dihydric phenol with a carbonate precursor The polytetrafluoroethylene used comprises a fine powder with a particle diameter of 01-100μm, preferably having a melting point of at least 320 degC The polycaprolactone used preferably comprises one having a molecular weight of 3,000 to 30,000 The phosphoric ester used preferably comprises triphenyl phosphate The glass filler used preferably comprises a glass flake with a mean diameter of 10-1,000μm and a ratio of mean diameter to thickness of (5 to 500):1

Cellulose triacetate membrane

Abstract: The invention discloses a cellulose triacetate membrane which is prepared from a solution containing cellulose triacetate, a solvent and a plasticizer by using a solution curtain-casting method. The cellulose triacetate membrane is characterized in that the dosage of the plasticizer is 3-15% of weight of the cellulose triacetate; the plasticizer is prepared from a triphenyl phosphate primary plasticizer and an aryl diphosphate coplasticizer; the weight ratio of aryl diphosphate to triphenyl phosphate is 1/6 to 4/5. By adopting the cellulose triacetate membrane, precipitation of the plasticizer caused by fluctuation of a production process condition in a membrane production process is solved; apparent defects of the membrane caused by precipitation of the plasticizer are avoided; the apparent mass, the optical property and the physical and mechanical properties of the membrane are ensured; meanwhile, the cellulose triacetate membrane accords with the environment-friendly emission requirements.

Application of flame retardant microcapsules to polyester and cotton fabrics nanos mikrokapsul z zaviralcem gorenja na poliestrno in bomba@no blago

Abstract: A microencapsulated fire retardant was used with the intention to produce fire retardant textiles. Melamine-formaldehyde polymer-wall microcapsules with a triphenyl phosphate core were applied to both a cotton woven and a polyester nonwoven fabric using impregnation and screen printing. The samples were observed with a scanning electron microscope (SEM). The combustion performance of the textile samples was examined with the limiting oxygen index (LOI) and the vertical burning test. The thermal properties of the microcapsules and fabrics were examined using TGA and DSC analyses. The mass per unit area, rigidity and air permeability of the treated fabrics were tested. The results show that the microcapsules with triphenyl phosphate can be successfully applied to cotton and polyester fabrics using screen printing and impregnation methods, but the fire retardation was successful only at the highest concentration of the microcapsules. At this concentration, the mechanical properties of the starting materials appear to deteriorate.