Plasticizers dimethyl phthalate

Physical and thermal properties CA polymer is rigid and requires plasticizers. Dimethyl phthalate, triacetin and triphenyl phosphate have been used commercially. CA is tough and it is thermoplastic. CA is not as effective as fully-synthetic polymers in electrical insulation. 

Additives used in final products Plasticizer dimethyl phthalate Stabilizer pentaerythritol Wbng, J Lu, Y Yuan, H, Polym.-Plast. Technol. Eng., 46,461-68, 2007. 

Fig. 40. Correlation between electrically and mechanically determined transition temperatures for PVC with different amounts of plasticizers , dimethyl phthalate A, n-dioctyl phthalate o, diethyl phthalate -I-, tricresyl phosphate x, dibutyl phthalate V, dibutyl sebacate and , unplasticized.

Phthalate esters are used widely as plasticizers in commercial polymers and plastic endproducts such as PVC. One phthalate classified as a priority pollutant is suspected to be present in three pesticide processes. Dimethyl phthalate is known to be a raw material in two products. 

Lewis and Patton (16) have furnished more detailed information on plasticizer analysis by gas chromatography. They analyzed a number of plasticizers of the ester type, present in technical mixtures and in plastics, using a glass column (length 120 cm. diameter 0.5 cm.) heated to 283° C. by the vapor from boiling dimethyl phthalate. The column was packed with apiezone oil on Celite 545 helium flow was 50 ml./min. 

Dibutyl phthalate is used in pharmaceutical formulations as a plasticizer in film-coatings. It is also used extensively as a solvent particularly in cosmetic formulations such as anti-perspirants, hair shampoos and hair sprays. In addition to a number of industrial applications, dibutyl phthalate is used as an insect repellent, although it is not as effective as dimethyl phthalate. 

Dimethyl phthalate is used in pharmaceutical applications as a solvent and plasticizer for film-coatings such as hydroxypropyl methylcellulose, cellulose acetate and cellulose acetate-butyrate mixtures. ... 

Ethylcellulose is compatible with the following plasticizers dibutyl phthalate diethyl phthalate dibutyl sebacate triethyl citrate tributyl citrate acetylated monoglyceride acetyl tributyl citrate triacetin dimethyl phthalate benzyl benzoate butyl and glycol esters of fatty acids refined mineral oils oleic acid stearic acid ethyl alcohol stearyl alcohol castor oil corn oil and camphor. 

Plasticizer solution containing 20% methyl ethyl ketone peroxide, stabilized with dimethyl phthalate and and a proprietary safety diluent, used principally in the curing of promoted unsaturated polyester resins where an extended catalyst is desired for improved concentration control. 

Use Alkyd resins, plasticizers, hardener for resins, polyesters, synthesis of phenolphthalein and other phthaleins, many other dyes, chlorinated products, pharmaceutical intermediates, insecticides, diethyl phthalate, dimethyl phthalate, laboratory reagent. 

The curve for the x value as a function of alcohol chain in di-n-alkyl phthalate plasticizers is shown in Figure 5. According to theory, compatibility is assured when the x value is below 0.5 above this the plasticizer becomes incompatible. In substantiation, dimethyl phthalate and di-n-dodecyl phthalate are both incompatible. 

The cellulose acetate most suitable for coatings have acetyl contents ranging from about 38 to 40% and a hydroxyl range between 3.0 and 4.0%. The lacquer-type cellulose acetates possess certain fundamental characteristics that have made them difficult to formulate as coatings, yet it is exactly these characteristics that make them valuable in certain areas of the protective coating field. The cellulose acetates are soluble only in very strong solvents (Table IV). They respond well to latent solvents, but they have very low tolerance for hydrocarbons. Compatibility with resins is poor, only a dozen or so commercially available resins are compatible. Only very active plasticizers like dimethyl phthalate, triacetin, or dimethoxyethy1 phthalate will remain in the film without exudation. 

It has already been mentioned that a large number of components are used for the construction of wood-based furniture. In addition to the compounds described earlier, a large spectrum of volatile organics can be found in emission studies (Salthammer, 1997b). The main sources for formaldehyde (which is not considered here), phenol and acetic acid are substrates such as particle board and MDF. BHT is a common antioxidant. Volatile plasticizers include dimethyl phthalate (DMP), dibutyl phthalate (DBP), as well as esters of adipic acid and sebacic acid. Further important compound groups are amines, siloxanes, carboxylic acids and naphthalenes. The identification of special substances does not only require suitable analytical equipment. Both experience and detailed knowledge of the chemical composition of furniture are also necessary. 

OTHER COMMENTS used in the manufacture of phthaleins, phthalates, benzoic acid, synthetic indigo, and artificial resins used as a chemical intermediate for dioctyl phthalates, phthalate plasticizers, and many phthalate esters used as a hardener for resins and polyesters employed in the synthesis of phenolphthalein, chlorinated products, diethyl phthalate, dimethyl phthalate, and pharmaceutical intermediates. 

Dimethyl phthalate (DMP) also has high dissolving capacity for CN. It has good compatibility with cellulose esters and are used in celluloid made fi-om CN and plastic compounds or films made from other cellulosic polymers, cellulose acetate (CA), cellulose acetate-butyrate (CAB), cellulose acetate-propionate (CAP), and cellulose propionate (CP). It is light stable but highly volatile. Diethyl phthalate (DEP) possesses properties similar to DMP and is slightly less volatile. 

Chem. Descrip. Dimethyl phthalate CAS 131-11-3 EINECS/ELINCS 205-011-6 Uses Plasticizer for cellulose acetate, nitrocellulose, nail polishes, deodorants, paints, varnishes Features Lightfast readily gelling Pale 4 [CasChem]... 

Multiwax W-145A plasticizer, cellophane lacquers Dicyclohexyl phthalate, Edenol DCHP plasticizer, cellulose 1,2,4-Butan l plasticizer, cellulose acetate 4-t-Butylphenot, Citroflex 2 Diethyl phthalate. Dimethyl phthalate, Palatinol A Palatinol K Palatinol M Phosflex 4 Plasticizer CEL Rit-Cizer 8 TBP Uniplex 108... 

Isoamyl butyrate Phenoxyethanol plasticizer, cellulose acetate lacquers Dimethyl phthalate plasticizer, cellulose acetate, nitrate 2-Nitro-1,1 -biphenyl plasticizer, cellulose compounds N,N-Butyl benzene sulfonamide plasticizer, cellulose ester N-(2-Hydroxypropyl) benzenesulfonamide plasticizer, cellulose ester plastics Dihexyl phthalate... 

Samples of cellttlose acetate plasticized with dimethyl phthalate are subjected to laboratory molding at 200°C for 10 min. dscosity change is measured to estimate the effect of molding on material. Optical density can also be used to determine the effect of molding. ... 

Figure 11.26. Initial decomposition temperature of polyimide membrane of different types and amounts of plasticizers. DGD — diethylene glycol dibenzoate, DMP — dimethyl phthalate. [Data from Totu E ...

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